Initial VST3 Support (disabled)

Disabled until Steinberg licensing compliance  can be sorted out.

.vscode/c_cpp_properties.json

@@ -4,7 +4,10 @@
             "name": "Linux",
             "includePath": [
                 "${default}",
-                "/usr/include/lilv-0"
+                "${workspaceFolder}",
+                "${workspaceFolder}/src",
+                "/usr/include/lilv-0",
+                "~/src/vst3sdk"
             ],
             "compilerPath": "/usr/bin/gcc",
             "cStandard": "c17",

.vscode/settings.json

@@ -90,9 +90,8 @@
         "span_ext": "cpp",
         "string_span": "cpp",
         "util": "cpp",
-
+        "charconv": "cpp",
-
+        "valarray": "cpp"
-
     },
     "cSpell.words": [
         "Guitarix",

docs/Gemfile.lock

@@ -265,7 +265,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.9)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext

lv2/aarch64/ToobAmp.lv2/ToobDelay.ttl

@@ -77,7 +77,7 @@ A straighforward no-frills digital delay.
                 lv2:minimum 0.0 ;
                 lv2:maximum 100.0 ;
                 units:unit units:pc;
-                rdfs:comment "Attenuation of the first delay";
+                rdfs:comment "Attenuation of the first echo";
 
         ], [
                 a lv2:InputPort ,
@@ -92,7 +92,7 @@ A straighforward no-frills digital delay.
                 lv2:minimum 0.0 ;
                 lv2:maximum 100.0 ;
                 units:unit units:pc;
-                rdfs:comment "Attenuation of subequent delays";
+                rdfs:comment "Attenuation of subequent echoes";
         ],  
         [
                 a lv2:AudioPort ,

react/public/img/vst.svg

@@ -0,0 +1,328 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Layer_1"
+   x="0px"
+   y="0px"
+   viewBox="0 0 123.64451 57.061291"
+   xml:space="preserve"
+   sodipodi:docname="vst.svg"
+   width="123.64451"
+   height="57.061291"
+   inkscape:version="1.0.2 (e86c870879, 2021-01-15)"><metadata
+   id="metadata1016"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+         rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
+   id="defs1014" /><sodipodi:namedview
+   pagecolor="#ffffff"
+   bordercolor="#666666"
+   borderopacity="1"
+   objecttolerance="10"
+   gridtolerance="10"
+   guidetolerance="10"
+   inkscape:pageopacity="0"
+   inkscape:pageshadow="2"
+   inkscape:window-width="1920"
+   inkscape:window-height="1019"
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+   showgrid="false"
+   fit-margin-top="2"
+   fit-margin-left="2"
+   fit-margin-right="2"
+   fit-margin-bottom="2"
+   inkscape:zoom="7.3537604"
+   inkscape:cx="51.146503"
+   inkscape:cy="48.566934"
+   inkscape:window-x="0"
+   inkscape:window-y="0"
+   inkscape:window-maximized="1"
+   inkscape:current-layer="Layer_1" />
+<style
+   type="text/css"
+   id="style849">
+	.st0{fill-rule:evenodd;clip-rule:evenodd;fill:#030304;stroke:#FFFFFF;stroke-width:0.8877;stroke-miterlimit:10;}
+	.st1{fill-rule:evenodd;clip-rule:evenodd;fill:#FFFFFF;}
+	.st2{fill:#030304;}
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+   d="m 96.6,99.2 v -0.6 c -0.1,0.2 -0.5,0.7 -1.2,0.7 -0.4,0 -0.9,-0.2 -1.1,-0.6 C 94.1,98.3 94,98 94,97.3 v -3.9 c 0,-1 0.4,-1.6 1.5,-1.6 1.1,0 1.4,0.7 1.4,1.3 v 1.1 h -0.5 v -0.9 c 0,-0.6 -0.1,-1.1 -1,-1.1 -0.8,0 -1,0.6 -1,1.2 v 3.8 c 0,0.6 0,0.9 0.1,1.2 0.1,0.2 0.3,0.5 0.8,0.5 0.7,0 1,-0.8 1,-1.2 V 96.4 H 95.2 V 96 H 97 v 3.4 h -0.4 z"
+   id="path1001" />
+	<path
+   class="st4"
+   d="m 102.1,99.2 v -4 c 0,-0.5 -0.1,-0.9 -0.7,-0.9 -0.4,0 -0.7,0.3 -0.9,0.6 v 4.2 h -0.4 V 95 c 0,-0.5 -0.2,-0.7 -0.7,-0.7 -0.5,0 -0.8,0.4 -0.8,0.6 v 4.3 H 98.2 V 94 h 0.4 v 0.4 c 0.1,-0.2 0.5,-0.5 1,-0.5 0.6,0 0.8,0.4 0.9,0.6 0.1,-0.2 0.4,-0.6 1.1,-0.6 0.5,0 1,0.3 1,1.2 v 4.2 h -0.5 z"
+   id="path1003" />
+	<path
+   class="st4"
+   d="m 103.7,91.8 h 0.4 v 2.6 c 0.3,-0.4 0.7,-0.5 1,-0.5 0.9,0 1,0.8 1,1.3 v 2.7 c 0,0.5 -0.3,1.2 -1.1,1.2 -0.1,0 -0.6,0 -0.8,-0.5 V 99 h -0.5 z m 0.5,5.9 c 0,0.9 0.6,1 0.8,1 0.5,0 0.7,-0.4 0.7,-1 v -2.6 c 0,-0.2 0,-0.9 -0.7,-0.9 -0.5,0 -0.8,0.4 -0.8,0.9 z"
+   id="path1005" />
+	<path
+   class="st4"
+   d="m 109.6,99.2 v -3.4 h -1.8 v 3.4 h -0.5 v -7 h 0.5 v 3.1 h 1.8 v -3.1 h 0.5 v 7 z"
+   id="path1007" />
+</g>
+<rect
+   style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:4;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+   id="rect1018"
+   width="115.64451"
+   height="49.061291"
+   x="4"
+   y="4" /></svg>

react/public/var/config.json

@@ -1,5 +1,5 @@
 {
-    "socket_server_port": 80,
+    "socket_server_port": 8080,
     "socket_server_address": "*",
     "debug": true,
     "max_upload_size": 1048576,

react/src/LoadPluginDialog.tsx

@@ -228,6 +228,7 @@ export const LoadPluginDialog =
                 let gridWidth = width - this.margin_reserve;
                 let columns = Math.floor((gridWidth) / this.nominal_column_width);
                 if (columns < 1) columns = 1;
+                if (columns > 3) columns = 3;
                 return columns;
             }
 
@@ -388,6 +389,14 @@ export const LoadPluginDialog =
                 // let selectedUri = this.state.selected_uri;
             }
 
+            vst3_indicator(uiPlugin? : UiPlugin)
+            {
+                if (uiPlugin?.is_vst3)
+                {
+                    return (<img alt="vst" src="/img/vst.svg" style={{marginLeft: 8,height: 22, opacity: 0.6,position: "relative",top: -1}} />)
+                }
+                return null;
+            }
             stereo_indicator(uiPlugin?: UiPlugin): string {
                 if (!uiPlugin) return "";
                 if (uiPlugin.audio_inputs === 2 || uiPlugin.audio_outputs === 2) {
@@ -436,7 +445,13 @@ export const LoadPluginDialog =
                 for (let i = 0; i < plugins.length; ++i) {
                     let plugin = plugins[i];
                     if (filterType === PluginType.Plugin || rootClass.is_type_of(filterType, plugin.plugin_type)) {
-                        let score = searchFilter.score(plugin.name, plugin.plugin_display_type, plugin.author_name);
+                        let score:number = 0;
+                        if (plugin.is_vst3)
+                        {
+                            score = searchFilter.score(plugin.name, plugin.plugin_display_type, plugin.author_name,"vst3");
+                        } else {
+                            score = searchFilter.score(plugin.name, plugin.plugin_display_type, plugin.author_name);
+                        }
 
                         if (score !== 0) {
                             if (this.state.favoritesList[plugin.uri]) {
@@ -668,8 +683,9 @@ export const LoadPluginDialog =
                                             <div style={{ display: "flex", justifyContent: "start", alignItems: "center", flex: "1 1 auto", height: "100%", overflow: "hidden" }} >
                                                 <PluginInfoDialog plugin_uri={this.state.selected_uri ?? ""} />
                                                 <Typography display='block' variant='body2' color="textPrimary" noWrap >
-                                                    {this.info_string(selectedPlugin)}
+                                                    {this.info_string(selectedPlugin)} 
                                                 </Typography>
+                                                {this.vst3_indicator(selectedPlugin)}
                                                 <div style={{
                                                     color: isFavorite ? "#F80" : "#CCC", display: (this.state.selected_uri !== "" ? "block" : "none"),
                                                     position: "relative", top: -2

react/src/Lv2Plugin.tsx

@@ -45,6 +45,8 @@ export class  Port implements Deserializable<Port> {
         this.supports_time_position = input.supports_time_position;
         this.port_group = input.port_group;
         this.comment = input.comment;
+        this.is_bypass = input.is_bypass;
+        this.is_program_controller = input.is_program_controller;
         return this;
     }
 
@@ -75,12 +77,17 @@ export class  Port implements Deserializable<Port> {
     supports_time_position: boolean = false;
     port_group:      string = "";
     comment: string = "";
+    is_bypass: boolean = false;
+    is_program_controller: boolean = false;
 }
 
 export class PortGroup {
     deserialize(input: any): PortGroup {
         this.symbol = input.symbol;
         this.name = input.name;
+        this.parent_group = input.parent_group;
+        this.program_list_id = input.program_list_id ?? -1;
+
         return this;
     }
     static deserialize_array(input: any) : PortGroup[] {
@@ -94,6 +101,8 @@ export class PortGroup {
 
     symbol: string = "";
     name: string = "";
+    parent_group: string = "";
+    program_list_id: number = -1;
 };
 
 export class  Lv2Plugin implements Deserializable<Lv2Plugin> {
@@ -223,10 +232,19 @@ export class  UiControl implements Deserializable<UiControl> {
         this.scale_points = ScalePoint.deserialize_array(input.scale_points);
         this.port_group = input.port_group;
         this.units = input.units as Units;
-        this.comment = input.comment;
+
+        this.comment = input.comment ?? "";
+        this.is_bypass = input.is_bypass ? true: false;
+        this.is_program_controller = input.is_program_controller? true: false;
+        this.custom_units = input.custom_units ?? "";
 
         this.controlType = ControlType.Dial;
 
+        if (this.is_bypass)
+        {
+            this.not_on_gui = true;
+        }
+
 
         if (this.enumeration_property && this.scale_points.length === 2)
         {
@@ -234,7 +252,7 @@ export class  UiControl implements Deserializable<UiControl> {
         } else {
             if (this.min_value === 0 && this.max_value === 1)
             {
-                if (this.toggled_property || this.integer_property)
+                if (this.toggled_property || this.integer_property || this.range_steps === 2)
                 {
                     this.controlType = ControlType.OnOffSwitch;
                 }
@@ -276,6 +294,10 @@ export class  UiControl implements Deserializable<UiControl> {
     port_group: string = "";
     units: Units = Units.none;
     comment: string = "";
+    is_bypass: boolean = true;
+    is_program_controller: boolean = true;
+    custom_units: string = "";
+
 
     // Return the value of the closest scale_point.
     clampSelectValue(value: number): number{
@@ -452,6 +474,7 @@ export class UiPlugin implements Deserializable<UiPlugin> {
         this.description = input.description;
         this.controls = UiControl.deserialize_array(input.controls);
         this.port_groups = PortGroup.deserialize_array(input.port_groups);
+        this.is_vst3 = input.is_vst3;
         return this;
 
     }
@@ -501,5 +524,6 @@ export class UiPlugin implements Deserializable<UiPlugin> {
     description: string  = "";
     controls:            UiControl[] = [];
     port_groups:  PortGroup[] = [];
+    is_vst3 :            boolean = false;
 }
 

react/src/PedalBoard.tsx

@@ -67,6 +67,7 @@ export class PedalBoardItem implements Deserializable<PedalBoardItem> {
         this.midiBindings = MidiBinding.deserialize_array(input.midiBindings);
 
         this.controlValues = ControlValue.deserializeArray(input.controlValues);
+        this.vstState = input.vstState ?? "";
         return this;
     }
     deserialize(input: any): PedalBoardItem {
@@ -183,6 +184,7 @@ export class PedalBoardItem implements Deserializable<PedalBoardItem> {
     pluginName?: string;
     controlValues: ControlValue[] = ControlValue.EmptyArray;
     midiBindings: MidiBinding[] = [];
+    vstState: string = "";
 };
 
 

react/src/PedalBoardView.tsx

@@ -62,6 +62,12 @@ const EMPTY_ICON_URL = "img/fx_empty.svg";
 const ERROR_ICON_URL = "img/fx_error.svg";
 const TERMINAL_ICON_URL = "img/fx_terminal.svg";
 
+function CalculateConnection(numberOfInputs: number, numberOfOutputs: number)
+{
+    let result = Math.min(numberOfInputs, numberOfOutputs);
+    if (result > 2) result = 2;
+    return result;
+}
 
 const pedalBoardStyles = (theme: Theme) => createStyles({
     scrollContainer: {
@@ -210,10 +216,9 @@ class PedalLayout {
 
     bounds: Rect = new Rect();
 
-    inputs: number = 0;
+    numberOfInputs: number = 2;
-    outputs: number = 0;
+    numberOfOutputs: number = 2;
-    stereoInput: boolean = false;
+
-    stereoOutput: boolean = false;
     pedalItem?: PedalBoardItem;
 
     // Split Layout only.
@@ -227,8 +232,8 @@ class PedalLayout {
         let t: PedalLayout = new PedalLayout();
         t.uri = START_PEDALBOARD_ITEM_URI;
         t.iconUrl = TERMINAL_ICON_URL;
-        t.inputs = 0;
+        t.numberOfInputs = 0;
-        t.outputs = 1;
+        t.numberOfOutputs = 2;
         return t;
     }
     static End(): PedalLayout {
@@ -236,8 +241,8 @@ class PedalLayout {
         t.pluginType = PluginType.UtilityPlugin;
         t.uri = END_PEDALBOARD_ITEM_URI;
         t.iconUrl = TERMINAL_ICON_URL;
-        t.inputs = 2;
+        t.numberOfInputs = 2;
-        t.outputs = 0;
+        t.numberOfOutputs = 0;
         return t;
     }
     constructor(model?: PiPedalModel, pedalItem?: PedalBoardItem) {
@@ -256,27 +261,27 @@ class PedalLayout {
             this.topChildren = makeChain(model, splitter.topChain);
             this.bottomChildren = makeChain(model, splitter.bottomChain);
 
-            this.inputs = 2;
+            this.numberOfInputs = 2;
-            this.outputs = 2;
+            this.numberOfOutputs = 2;
 
         } else if (pedalItem.isEmpty()) {
 
             this.pluginType = PluginType.UtilityPlugin;
             this.iconUrl = EMPTY_ICON_URL;
-            this.inputs = 2;
+            this.numberOfInputs = 2;
-            this.outputs = 2;
+            this.numberOfOutputs = 2;
 
         } else if (pedalItem.uri === START_PEDALBOARD_ITEM_URI) {
             this.pluginType = PluginType.UtilityPlugin;
             this.iconUrl = TERMINAL_ICON_URL;
-            this.inputs = 0;
+            this.numberOfInputs = 0;
-            this.outputs = PiPedalModelFactory.getInstance().jackSettings.get().inputAudioPorts.length;
+            this.numberOfOutputs = PiPedalModelFactory.getInstance().jackSettings.get().inputAudioPorts.length;
 
         } else if (pedalItem.uri === END_PEDALBOARD_ITEM_URI) {
             this.pluginType = PluginType.UtilityPlugin;
             this.iconUrl = TERMINAL_ICON_URL;
-            this.inputs = PiPedalModelFactory.getInstance().jackSettings.get().outputAudioPorts.length;
+            this.numberOfInputs = PiPedalModelFactory.getInstance().jackSettings.get().outputAudioPorts.length;
-            this.outputs = 0;
+            this.numberOfOutputs = 0;
         }
         else {
             let uiPlugin = model.getUiPlugin(pedalItem.uri);
@@ -284,15 +289,15 @@ class PedalLayout {
                 this.pluginType = uiPlugin.plugin_type;
                 this.iconUrl = SelectIcon(uiPlugin.plugin_type,uiPlugin.uri);
                 this.name = uiPlugin.name;
-                this.inputs = uiPlugin.audio_inputs;
+                this.numberOfInputs = Math.max(uiPlugin.audio_inputs,2);
-                this.outputs = uiPlugin.audio_outputs;
+                this.numberOfOutputs = Math.max(uiPlugin.audio_outputs,2);
             } else {
                 // default to empty plugin.
                 this.pluginType = PluginType.UtilityPlugin;
                 this.name = pedalItem.pluginName??"#error";
                 this.iconUrl = ERROR_ICON_URL;
-                this.inputs = 2;
+                this.numberOfInputs = 2;
-                this.outputs = 2;
+                this.numberOfOutputs = 2;
             }
         }
     }
@@ -677,18 +682,18 @@ const PedalBoardView =
                 // let classes = this.props.classes;
                 let x_ = item.bounds.x + CELL_WIDTH / 2;
                 let y_ = item.bounds.y + CELL_HEIGHT / 2;
-                let isStereo = item.stereoOutput;
+                let numberOfOutputs = item.numberOfOutputs;
                 let color = enabled ? ENABLED_CONNECTOR_COLOR : DISABLED_CONNECTOR_COLOR;
                 let svgPath = new SvgPathBuilder().moveTo(x_, y_).lineTo(x_ + CELL_WIDTH, y_).toString();
 
-                if (isStereo) {
+                if (numberOfOutputs === 2) {
                     output.push((
                         <path d={svgPath} stroke={color} strokeWidth={SVG_STEREO_STROKE_WIDTH} />
                     ));
                     output.push((
                         <path d={svgPath} stroke="white" strokeWidth={SVG_STROKE_WIDTH} />
                     ));
-                } else {
+                } else if (numberOfOutputs === 1) {
                     output.push((
                         <path d={svgPath} stroke={color} strokeWidth={SVG_STROKE_WIDTH} />
                     ));
@@ -712,18 +717,18 @@ const PedalBoardView =
                 let topStartPath = new SvgPathBuilder().moveTo(x_, y_).lineTo(x_, yTop).lineTo(x_ + CELL_WIDTH, yTop).toString();
                 let bottomStartPath = new SvgPathBuilder().moveTo(x_, y_).lineTo(x_, yBottom).lineTo(x_ + CELL_WIDTH, yBottom).toString();
 
-                if (item.stereoInput && item.topChildren[0].stereoInput) {
+                if (item.numberOfInputs === 2 && item.topChildren[0].numberOfInputs === 2) {
                     output.push((<path d={topStartPath} stroke={topColor} strokeWidth={SVG_STEREO_STROKE_WIDTH} />));
                     output.push((<path d={topStartPath} stroke="white" strokeWidth={SVG_STROKE_WIDTH} />));
-                } else {
+                } else if (item.numberOfInputs !== 0 && item.topChildren[0].numberOfInputs !== 0) {
                     output.push((<path d={topStartPath} stroke={topColor} strokeWidth={SVG_STROKE_WIDTH} />));
                 }
 
-                if (item.stereoInput && item.bottomChildren[0].stereoInput) {
+                if (item.numberOfInputs === 2 && item.bottomChildren[0].numberOfInputs === 2) {
                     output.push((<path d={bottomStartPath} stroke={bottomColor} strokeWidth={SVG_STEREO_STROKE_WIDTH} />));
                     output.push((<path d={bottomStartPath} stroke="white" strokeWidth={SVG_STROKE_WIDTH} />));
 
-                } else {
+                } else if (item.numberOfInputs !== 0 && item.bottomChildren[0].numberOfInputs !== 0) {
                     output.push((<path d={bottomStartPath} stroke={bottomColor} strokeWidth={SVG_STROKE_WIDTH} />));
                 }
 
@@ -741,6 +746,8 @@ const PedalBoardView =
 
                 let firstPathStereo: boolean;
                 let secondPathStereo: boolean;
+                let firstPathAbsent: boolean;
+                let secondPathAbsent: boolean;
                 let firstPathEnabled: boolean;
                 let secondPathEnabled: boolean;
                 let xTee: number;
@@ -753,11 +760,13 @@ const PedalBoardView =
 
                 // Third case: L/R stereo output, when both outputs are mono, requires a third stroke.
                 let thirdPath: string | null = null; // for L/R stereo output (which can be stereo even if both outputs are mono)
-                let hasThirdPath = item.stereoOutput && (!lastTop.stereoOutput) && (!lastBottom.stereoOutput);
+                let hasThirdPath = item.numberOfOutputs === 2 && (lastTop.numberOfOutputs !== 2) && (lastBottom.numberOfOutputs !== 2);
 
                 if (hasThirdPath) {
                     firstPathStereo = false;
                     secondPathStereo = false;
+                    firstPathAbsent = lastTop.numberOfOutputs === 0 || item.numberOfOutputs === 0;
+                    secondPathAbsent = lastBottom.numberOfOutputs === 0 || item.numberOfOutputs === 0;
                     xTee = xTee0 - monoAdjustment;
                     firstPath = new SvgPathBuilder().moveTo(xBottom, yBottom).lineTo(xTee, yBottom).lineTo(xTee, y_).toString();
 
@@ -767,10 +776,13 @@ const PedalBoardView =
                     thirdPath= new SvgPathBuilder().moveTo(xTee0,y_).lineTo(xEnd,y_).toString();
                     firstPathEnabled = bottomEnabled;
                     secondPathEnabled = topEnabled;
-                } else if (bottomPathFirst || (topEnabled && lastTop.stereoOutput)) {
+                } else if (bottomPathFirst || (topEnabled && lastTop.numberOfOutputs === 2)) {
                     // draw the bottom path first.
-                    firstPathStereo = item.stereoOutput && lastBottom.stereoOutput;
+                    firstPathStereo = item.numberOfOutputs === 2 && lastBottom.numberOfOutputs === 2;
-                    secondPathStereo = item.stereoOutput && lastTop.stereoOutput;
+                    secondPathStereo = item.numberOfOutputs === 2 && lastTop.numberOfOutputs === 2;
+                    firstPathAbsent = item.numberOfOutputs === 0 || lastBottom.numberOfOutputs === 0;
+                    secondPathAbsent = item.numberOfOutputs === 0 || lastTop.numberOfOutputs === 0;
+
                     xTee = firstPathStereo ? xTee0 : xTee0 - monoAdjustment;
                     firstPath = new SvgPathBuilder().moveTo(xBottom, yBottom).lineTo(xTee, yBottom).lineTo(xTee, y_).toString();
                     xTee = secondPathStereo ? xTee0 : xTee0 - monoAdjustment;
@@ -780,8 +792,10 @@ const PedalBoardView =
                     secondPathEnabled = topEnabled;
                 } else {
                     // draw the top path first.
-                    firstPathStereo = item.stereoOutput && lastTop.stereoOutput;
+                    firstPathStereo = item.numberOfOutputs === 2 && lastTop.numberOfOutputs === 2;
-                    secondPathStereo = item.stereoOutput && lastBottom.stereoOutput;
+                    secondPathStereo = item.numberOfOutputs === 2 && lastBottom.numberOfOutputs === 2;
+                    firstPathAbsent = item.numberOfOutputs === 0 || lastTop.numberOfOutputs === 0;
+                    secondPathAbsent = item.numberOfOutputs === 0 || lastBottom.numberOfOutputs === 0;
 
                     xTee = firstPathStereo ? xTee0 : xTee0 - monoAdjustment;
                     firstPath = new SvgPathBuilder().moveTo(xTop, yTop).lineTo(xTee, yTop).lineTo(xTee, y_).toString();
@@ -804,7 +818,7 @@ const PedalBoardView =
                         output.push((
                             <path d={firstPath} stroke="white" strokeWidth={SVG_STROKE_WIDTH} />
                         ));
-                    } else {
+                    } else if (!firstPathAbsent) {
                         output.push((
                             <path d={firstPath} stroke={firstPathColor} strokeWidth={SVG_STROKE_WIDTH} />
                         ));
@@ -816,7 +830,7 @@ const PedalBoardView =
                         output.push((
                             <path d={secondPath} stroke="white" strokeWidth={SVG_STROKE_WIDTH} />
                         ));
-                    } else {
+                    } else if (!secondPathAbsent) {
                         output.push((
                             <path d={secondPath} stroke={secondPathColor} strokeWidth={SVG_STROKE_WIDTH} />
                         ));
@@ -828,7 +842,7 @@ const PedalBoardView =
                         output.push((
                             <path d={firstPath} stroke={firstPathColor} strokeWidth={SVG_STEREO_STROKE_WIDTH} />
                         ));
-                    } else {
+                    } else if (!firstPathAbsent) {
                         output.push((
                             <path d={firstPath} stroke={firstPathColor} strokeWidth={SVG_STROKE_WIDTH} />
                         ));
@@ -837,7 +851,7 @@ const PedalBoardView =
                         output.push((
                             <path d={secondPath} stroke={secondPathColor} strokeWidth={SVG_STEREO_STROKE_WIDTH} />
                         ));
-                    } else {
+                    } else if (!secondPathAbsent) {
                         output.push((
                             <path d={secondPath} stroke={secondPathColor} strokeWidth={SVG_STROKE_WIDTH} />
                         ));
@@ -1011,126 +1025,130 @@ const PedalBoardView =
                 }
                 return true;
             }
-            canOutputStereo(item: PedalLayout): boolean {
+            getNumberOfInputs(item: PedalLayout): number {
                 if (item.pedalItem) {
                     let plugin = this.model.getUiPlugin(item.pedalItem.uri);
                     if (plugin) {
-                        return plugin.audio_outputs === 2;
+                        return plugin.audio_inputs;
                     }
                 }
-                return true;
+                return 1;
+            }
+            getNumberOfOutputs(item: PedalLayout): number {
+                if (item.pedalItem) {
+                    let plugin = this.model.getUiPlugin(item.pedalItem.uri);
+                    if (plugin) {
+                        return plugin.audio_outputs;
+                    }
+                }
+                return 1;
             }
 
-            markStereoOutputs(layoutChain: PedalLayout[], stereoInput: boolean, stereoOutput: boolean) {
+            markStereoOutputs(layoutChain: PedalLayout[], numberOfInputs: number, numberOfOutputs: number) {
                 // analyze forward flow.
-                this.markStereoForward(layoutChain, stereoInput);
+                this.markStereoForward(layoutChain, numberOfInputs);
                 // mark items that feed a mono effect as mono.
-                this.markStereoBackward(layoutChain, stereoOutput);
+                this.markStereoBackward(layoutChain, numberOfOutputs);
             }
 
-            markStereoBackward(layoutChain: PedalLayout[], stereoOutput: boolean) : boolean
+            markStereoBackward(layoutChain: PedalLayout[], numberOfOutputs: number) : number
             {
                 for (let i = layoutChain.length-1; i >= 0; --i)
                 {
                     let item = layoutChain[i];
                     if (item.isSplitter())
                     {
-                        if (!stereoOutput)
+                        item.numberOfOutputs = CalculateConnection(item.numberOfOutputs, numberOfOutputs)
-                        {
-                            item.stereoOutput = false;
-                        }
-                        this.markStereoBackward(item.topChildren,stereoOutput);
-                        this.markStereoBackward(item.bottomChildren,stereoOutput);
-                        let topStereoInput = item.topChildren[0].stereoInput;
-                        let bottomStereoInput = item.bottomChildren[0].stereoInput;
 
-                        if (! (topStereoInput || bottomStereoInput))
+                        this.markStereoBackward(item.topChildren,numberOfOutputs);
+                        this.markStereoBackward(item.bottomChildren,numberOfOutputs);
+                        let topInputs = item.topChildren[0].numberOfInputs;
+                        let bottomInputs = item.bottomChildren[0].numberOfInputs;
+
+                        let splitItem = item.pedalItem as PedalBoardSplitItem;
+                        if (splitItem.getSplitType() !== SplitType.Lr)
                         {
-                            let splitItem = item.pedalItem as PedalBoardSplitItem;
+                            item.numberOfInputs = CalculateConnection(item.numberOfInputs, Math.max(topInputs,bottomInputs));
-                            if (splitItem.getSplitType() !== SplitType.Lr)
-                            {
-                                item.stereoInput = false;
-                            }
                         }
                     } else if (item.isEnd())
                     {
 
                     } else if (item.isStart())
                     {
-                        if (!stereoOutput)
+                        item.numberOfOutputs = CalculateConnection(item.numberOfOutputs,numberOfOutputs);
-                        {
+                        return item.numberOfOutputs;
-                            item.stereoOutput = false;
-                        }
-                        return item.stereoOutput;
 
                     } else if (item.isEmpty()) {
-                        if (!stereoOutput)
+                        if (numberOfOutputs === 0)
                         {
-                            item.stereoOutput = false;
+                            item.numberOfOutputs = 0;
-                            item.stereoInput = false;
+                            item.numberOfInputs = CalculateConnection(item.numberOfInputs,2);
+                        } else {
+                            item.numberOfOutputs = CalculateConnection(item.numberOfOutputs,numberOfOutputs);
+                            item.numberOfInputs = CalculateConnection(item.numberOfInputs,numberOfOutputs);
                         }
                     } else {
-                        if (!stereoOutput)
+                        item.numberOfOutputs = CalculateConnection(item.numberOfOutputs,numberOfOutputs);
-                        {
-                            item.stereoOutput = false;
-                        }
                     }
-                    stereoOutput = item.stereoInput;
+                    numberOfOutputs = item.numberOfInputs;
                 }
-                return stereoOutput;
+                return numberOfOutputs;
             }
-            markStereoForward(layoutChain: PedalLayout[],stereoInput: boolean): boolean
+            markStereoForward(layoutChain: PedalLayout[],numberOfInputs: number): number
             {
                 if (layoutChain.length === 0) {
-                    return stereoInput;
+                    return numberOfInputs;
                 }
                 for (let i = 0; i < layoutChain.length; ++i) {
                     let item = layoutChain[i];
                     if (item.isSplitter()) {
                         let splitter = item.pedalItem as PedalBoardSplitItem;
-                        item.stereoInput = stereoInput;
+                        item.numberOfInputs = numberOfInputs;
 
-                        let isChainInputStereo = stereoInput;
+                        let chainInputs = numberOfInputs;
                         if (splitter.getSplitType() === SplitType.Lr)
                         {
-                            isChainInputStereo = false;
+                            chainInputs = CalculateConnection(numberOfInputs,1);
                         }
-
+                        let topOutputs = this.markStereoForward(item.topChildren, chainInputs);
-                        let topStereo = this.markStereoForward(item.topChildren, isChainInputStereo);
+                        let bottomOutputs = this.markStereoForward(item.bottomChildren, chainInputs);
-                        let bottomStereo = this.markStereoForward(item.bottomChildren, isChainInputStereo);
 
 
                         if (splitter.getSplitType() === SplitType.Ab) {
                             if (splitter.isASelected()) {
-                                item.stereoOutput = topStereo;
+                                item.numberOfOutputs = topOutputs;
                             } else {
-                                item.stereoOutput = bottomStereo;
+                                item.numberOfOutputs = bottomOutputs;
                             }
                         } else if (splitter.getSplitType() === SplitType.Lr) {
-                            item.stereoOutput = true;   
+                            item.numberOfOutputs = (topOutputs !== 0 && bottomOutputs !== 0) ? 2: 0;
                         } else {
-                            item.stereoOutput = topStereo || bottomStereo;
+                            item.numberOfOutputs = CalculateConnection(topOutputs,bottomOutputs);
                         }
                     } else if (item.isStart())
                     {
-                        item.stereoOutput = (PiPedalModelFactory.getInstance().jackSettings.get().inputAudioPorts.length > 1);
+                        item.numberOfOutputs = Math.min(PiPedalModelFactory.getInstance().jackSettings.get().inputAudioPorts.length,2);
                     } else if (item.isEnd()) {
-                        item.stereoInput = (PiPedalModelFactory.getInstance().jackSettings.get().outputAudioPorts.length > 1) && stereoInput;
+                        item.numberOfInputs = 
-                        return item.stereoInput;
+                            CalculateConnection(
+                                Math.min(PiPedalModelFactory.getInstance().jackSettings.get().outputAudioPorts.length,2),
+                                numberOfInputs);
+                        return item.numberOfInputs;
                     } else if (item.isEmpty()) {
-                        item.stereoInput = stereoInput;
+                        item.numberOfInputs = numberOfInputs;
-                        item.stereoOutput = stereoInput;
+                        if (numberOfInputs === 0)
-                    } else  {
+                        {
-                        if (stereoInput && this.canOutputStereo(item)) {
+                            item.numberOfOutputs = 2;
-                            item.stereoInput = true;
                         } else {
-                            item.stereoInput = false;
+                            item.numberOfOutputs = item.numberOfInputs;
                         }
-                        item.stereoOutput = this.canOutputStereo(item);
+                    } else  {
+                        item.numberOfInputs = CalculateConnection(numberOfInputs,this.getNumberOfInputs(item));
+                        item.numberOfOutputs = this.getNumberOfOutputs(item);
                     }
-                    stereoInput = item.stereoOutput;
+                    numberOfInputs = item.numberOfOutputs;
                 }
-                return stereoInput;
+                return numberOfInputs;
             }
 
             currentLayout?: PedalLayout[];
@@ -1145,7 +1163,7 @@ const PedalBoardView =
                 {
                     layoutChain.splice(0, 0, start);
                     layoutChain.splice(layoutChain.length, 0, end);
-                    this.markStereoOutputs(layoutChain, true, true);
+                    this.markStereoOutputs(layoutChain, 2,2);
                 }
 
                 let layoutSize = this.doLayout(layoutChain);

react/src/PiPedalModel.tsx

@@ -22,7 +22,7 @@ import { UiPlugin, UiControl, PluginType } from './Lv2Plugin';
 import { PiPedalArgumentError, PiPedalStateError } from './PiPedalError';
 
 import { ObservableProperty } from './ObservableProperty';
-import { PedalBoard, ControlValue } from './PedalBoard'
+import { PedalBoard, PedalBoardItem, ControlValue } from './PedalBoard'
 import PluginClass from './PluginClass';
 import PiPedalSocket, { PiPedalMessageHeader } from './PiPedalSocket';
 import { nullCast } from './Utility'
@@ -303,6 +303,13 @@ interface ControlChangedBody {
     symbol: string;
     value: number;
 };
+interface Vst3ControlChangedBody {
+    clientId: number;
+    instanceId: number;
+    symbol: string;
+    value: number;
+    state: string;
+};
 
 export interface FavoritesList {
     [url: string]: boolean;
@@ -634,6 +641,16 @@ class PiPedalModelImpl implements PiPedalModel {
                 controlChangedBody.value,
                 false // do NOT notify the server of the change.
             );
+        } else if (message === "onVst3ControlChanged") {
+            let controlChangedBody = body as Vst3ControlChangedBody;
+            this._setVst3PedalBoardControlValue(
+                controlChangedBody.instanceId,
+                controlChangedBody.symbol,
+                controlChangedBody.value,
+                controlChangedBody.state,
+                false // do NOT notify the server of the change.
+            );
+
         } else if (message === "onJackServerSettingsChanged") {
             let jackServerSettings = new JackServerSettings().deserialize(body);
             this.jackServerSettings.set(jackServerSettings);
@@ -1195,6 +1212,29 @@ class PiPedalModelImpl implements PiPedalModel {
             }
         }
 
+    }
+    _setVst3PedalBoardControlValue(instanceId: number, key: string, value: number, state: string, notifyServer: boolean ): void {
+        let pedalBoard = this.pedalBoard.get();
+        if (pedalBoard === undefined) throw new PiPedalStateError("Pedalboard not ready.");
+        let newPedalBoard = pedalBoard.clone();
+
+        let item: PedalBoardItem = newPedalBoard.getItem(instanceId);
+        let changed = item.setControlValue(key, value);
+        item.vstState = state;
+
+        if (changed) {
+            this.pedalBoard.set(newPedalBoard);
+            if (notifyServer) {
+                this._setServerControl("setControl", instanceId, key, value);
+            }
+            for (let i = 0; i < this._controlValueChangeItems.length; ++i) {
+                let item = this._controlValueChangeItems[i];
+                if (instanceId === item.instanceId) {
+                    item.onValueChanged(key, value);
+                }
+            }
+        }
+
     }
 
     setPedalBoardControlValue(instanceId: number, key: string, value: number): void {
@@ -1232,7 +1272,7 @@ class PiPedalModelImpl implements PiPedalModel {
             clientId: this.clientId,
             pedalBoard: this.pedalBoard.get()
         };
-        this.webSocket?.send("setCurrentPedalBoard", body);
+        this.webSocket?.send("updateCurrentPedalBoard", body);
 
     }
 
@@ -1288,6 +1328,8 @@ class PiPedalModelImpl implements PiPedalModel {
     deletePedalBoardPedal(instanceId: number): number | null {
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+        this.updateVst3State(newPedalBoard);
+
         let result = newPedalBoard.deleteItem(instanceId);
         if (result != null) {
             this.pedalBoard.set(newPedalBoard);
@@ -1301,6 +1343,9 @@ class PiPedalModelImpl implements PiPedalModel {
         if (fromInstanceId === toInstanceId) return;
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+
+        this.updateVst3State(newPedalBoard);
+
         let fromItem = newPedalBoard.getItem(fromInstanceId);
         if (fromItem === null) {
             throw new PiPedalArgumentError("fromInstanceId not found.");
@@ -1317,6 +1362,9 @@ class PiPedalModelImpl implements PiPedalModel {
         if (fromInstanceId === toInstanceId) return;
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+
+        this.updateVst3State(newPedalBoard);
+
         let fromItem = newPedalBoard.getItem(fromInstanceId);
         if (fromItem === null) {
             throw new PiPedalArgumentError("fromInstanceId not found.");
@@ -1334,6 +1382,10 @@ class PiPedalModelImpl implements PiPedalModel {
 
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+
+        this.updateVst3State(newPedalBoard);
+
+
         let fromItem = newPedalBoard.getItem(instanceId);
         if (fromItem === null) {
             throw new PiPedalArgumentError("fromInstanceId not found.");
@@ -1350,6 +1402,9 @@ class PiPedalModelImpl implements PiPedalModel {
 
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+        this.updateVst3State(newPedalBoard);
+
+
         let fromItem = newPedalBoard.getItem(instanceId);
         if (fromItem === null) {
             throw new PiPedalArgumentError("fromInstanceId not found.");
@@ -1371,6 +1426,9 @@ class PiPedalModelImpl implements PiPedalModel {
 
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+        this.updateVst3State(newPedalBoard);
+
+
         let fromItem = newPedalBoard.getItem(fromInstanceId);
         let toItem = newPedalBoard.getItem(toInstanceId);
         if (fromItem === null) {
@@ -1389,6 +1447,9 @@ class PiPedalModelImpl implements PiPedalModel {
     addPedalBoardItem(instanceId: number, append: boolean): number {
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+        this.updateVst3State(newPedalBoard);
+
+
         let item = newPedalBoard.getItem(instanceId);
         if (item === null) {
             throw new PiPedalArgumentError("instanceId not found.");
@@ -1402,6 +1463,8 @@ class PiPedalModelImpl implements PiPedalModel {
     addPedalBoardSplitItem(instanceId: number, append: boolean): number {
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+        this.updateVst3State(newPedalBoard);
+
         let item = newPedalBoard.getItem(instanceId);
         if (item === null) {
             throw new PiPedalArgumentError("instanceId not found.");
@@ -1416,6 +1479,9 @@ class PiPedalModelImpl implements PiPedalModel {
     setPedalBoardItemEmpty(instanceId: number): number {
         let pedalBoard = this.pedalBoard.get();
         let newPedalBoard = pedalBoard.clone();
+        this.updateVst3State(newPedalBoard);
+
+
         let item = newPedalBoard.getItem(instanceId);
         if (item === null) {
             throw new PiPedalArgumentError("instanceId not found.");
@@ -1768,12 +1834,24 @@ class PiPedalModelImpl implements PiPedalModel {
                 this.showAlert(error);
             });
     }
+
+    updateVst3State(pedalBoard: PedalBoard)
+    {
+        // let it = pedalBoard.itemsGenerator();
+        // while (true) {
+        //     let v = it.next();
+        //     if (v.done) break;
+        //     let item = v.value;
+        // }
+    }
+
     setMidiBinding(instanceId: number, midiBinding: MidiBinding): void {
         let pedalBoard = this.pedalBoard.get();
         if (!pedalBoard) {
             throw new PiPedalStateError("Pedalboard not loaded.");
         }
         let newPedalBoard = pedalBoard.clone();
+        this.updateVst3State(newPedalBoard);
         if (newPedalBoard.setMidiBinding(instanceId, midiBinding)) {
             this.pedalBoard.set(newPedalBoard);
             // notify the server.

react/src/PluginControl.tsx

@@ -603,17 +603,23 @@ const PluginControl =
                 let uiControl = this.props.uiControl;
                 if (uiControl) {
                     if (uiControl.range_steps > 1) {
-                        range = Math.round(range * uiControl.range_steps-1) / (uiControl.range_steps-1);
+                        range = Math.round(range * (uiControl.range_steps-1)) / (uiControl.range_steps-1);
                     }
                     let value: number;
-                    if (uiControl.is_logarithmic)
+                    if (uiControl.min_value === uiControl.max_value)
                     {
-                        value = uiControl.min_value*Math.pow(uiControl.max_value/uiControl.min_value,range);
+                        value = uiControl.min_value;
-                    } else {
+                    } else
-                        value = range * (uiControl.max_value - uiControl.min_value) + uiControl.min_value;
+                    {
-                    }
+                        if (uiControl.is_logarithmic)
-                    if (uiControl.integer_property) {
+                        {
-                        value = Math.round(value);
+                            value = uiControl.min_value*Math.pow(uiControl.max_value/uiControl.min_value,range);
+                        } else {
+                            value = range * (uiControl.max_value - uiControl.min_value) + uiControl.min_value;
+                        }
+                        if (uiControl.integer_property) {
+                            value = Math.round(value);
+                        }
                     }
                     return value;
                 }

src/AlsaDriver.cpp

@@ -29,6 +29,7 @@
 #include "AlsaDriver.hpp"
 #include "JackServerSettings.hpp"
 #include <thread>
+#include "RtInversionGuard.hpp"
 
 #include "CpuUse.hpp"
 
@@ -967,7 +968,7 @@ namespace pipedal
 
                 struct sched_param param;
                 memset(&param, 0, sizeof(param));
-                param.sched_priority = 79;
+                param.sched_priority = RT_THREAD_PRIORITY;
 
                 int result = sched_setscheduler(0, SCHED_RR, &param);
                 if (result == 0)

src/CMakeLists.txt

@@ -7,6 +7,37 @@ set (USE_PCH 1)
 
 include(FindPkgConfig)
 
+#################################################################
+# ENABLE/DISABLE VST3 Support.
+# Disabled, pending Steinberg licensing agreement implementation
+# and approval..
+# Do not enable unless you have non-GPL3 access to the Steinberg 
+# SDK.
+#################################################################
+
+set (ENABLE_VST3 0)
+
+
+if (ENABLE_VST3) 
+    set (VST3PATH  "../../vst3sdk")
+    message(STATUS " VST3 Support Enabled")
+    set (VST3_INCLUDES "${VST3PATH}")
+
+    if (CMAKE_BUILD_TYPE MATCHES Debug)
+        add_compile_definitions("DEVELOPMENT")
+    else()
+    add_compile_definitions("RELEASE")
+    endif()
+    add_compile_definitions("ENABLE_VST3" )
+    #add_compile_definitions("_GLIBCXX_USE_CXX11_ABI")
+
+else()
+    message(STATUS " VST3 Support Disabled")
+    set (VST3_INCLUDES "")
+endif()
+
+########### VST 3 SUPPORT #############################################3
+
 
 
 # Can't get the pkg_check to work.
@@ -60,19 +91,27 @@ set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 set (USE_SANITIZE False)
+
+if (!ENABLE_VST3)
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wno-psabi")
+else()
+    set (CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -Wno-multichar -Wno-psabi")
+endif()
+
+
 if (CMAKE_BUILD_TYPE MATCHES Debug)
     message(STATUS "Debug build")
 
-    set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-Wno-psabi -O0 -DDEBUG -Werror" )
+    set (CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -O0 -DDEBUG" )
     if (USE_SANITIZE) 
-        set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-fsanitize=address -static-libasan " )
+        set (CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -fsanitize=address -static-libasan " )
     endif()
 elseif(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
     message(STATUS "RelWithgDebInfo build")
-    set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-Wno-psabi -Werror" )
+    #set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "" )
 else()
     message(STATUS "Release build")
-    set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-Wno-psabi -Werror" )
+    #set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "" )
 endif()
 
 
@@ -84,8 +123,19 @@ message (STATUS "Cxx flags: ${CMAKE_CXX_FLAGS}"  )
 add_definitions(-DBOOST_ERROR_CODE_HEADER_ONLY -DBOOST_BIND_GLOBAL_PLACEHOLDERS -DONBOARDING)
 
  
+if (VST3PATH)
+set (VST3_SOURCES
+    vst3/Vst3Effect.hpp Vst3Effect.cpp
+    vst3/Vst3Host.hpp Vst3Host.cpp
+    Vst3MidiToEvent.hpp
+    vst3/Vst3RtStream.hpp Vst3RtStream.cpp
+    )
+else()
+   set (VST3_SOURCES)
+endif()
 
 set (PIPEDAL_SOURCES
+    RtInversionGuard.hpp
     CpuUse.hpp CpuUse.cpp 
     P2pConfigFiles.hpp
     AvahiService.cpp AvahiService.hpp
@@ -104,7 +154,7 @@ set (PIPEDAL_SOURCES
     WifiDirectConfigSettings.hpp WifiDirectConfigSettings.cpp
     ConfigUtil.hpp ConfigUtil.cpp
 
-    RequestHandler.hpp json.cpp json.hpp Scratch.cpp Lv2Host.hpp Lv2Host.cpp
+    RequestHandler.hpp json.cpp json.hpp Scratch.cpp PiPedalHost.hpp PiPedalHost.cpp
     PluginType.hpp PluginType.cpp
     Lv2Log.hpp Lv2Log.cpp
     PiPedalSocket.hpp PiPedalSocket.cpp
@@ -152,6 +202,7 @@ set (PIPEDAL_SOURCES
     AudioDriver.hpp
     AudioConfig.hpp
 
+    ${VST3_SOURCES}
 )
 
 
@@ -161,16 +212,25 @@ include_directories( ${pipedald_SOURCE_DIR}/. ../build/src)
 set (PIPEDAL_INCLUDES     
     ${LV2DEV_INCLUDE_DIRS}
     ${JACK_INCLUDE_DIRS} ${LILV_0_INCLUDE_DIRS}  ${LIBNL3_INCLUDE_DIRS} ${LVDEV_INCLUDE_DIRS}
+    ${VST3_INCLUDES}
+    .
 )
 
-set(PIPEDAL_LIBS libpipedald pthread atomic stdc++fs asound avahi-common avahi-client systemd
+set(PIPEDAL_LIBS libpipedald 
+    pthread atomic stdc++fs asound avahi-common avahi-client systemd
      ${LILV_0_LIBRARIES} 
      # ${JACK_LIBRARIES} 
-     ${LIBNL3_LIBRARIES}  )
+     ${LIBNL3_LIBRARIES} 
+      )
+
+if (VST3_ENABLED)
+
+    set (PIPEDAL_LIBS vst3_lib ${PIPEDAL_LIBS})
+endif()
 
 
 ##########################
-
+ 
 add_library(libpipedald STATIC ${PIPEDAL_SOURCES})
 
 target_include_directories(libpipedald PRIVATE ${PIPEDAL_INCLUDES}
@@ -226,6 +286,217 @@ target_link_libraries(pipedaltest PRIVATE ${PIPEDAL_LIBS}
     )
 
 
+#########################################################
+#  VST3 Source.
+#
+#  VST3 support is optional, because it poses unfortunate 
+#  licensing problems.
+
+#  There's no easy way to get the VST SDK to build without
+#  GCC c++11 linkage, which is not compatible with  pipedal's
+#  use of C++20 features (strictly a link time breakage).
+#
+#  So pipedal rebuilds the VST3 SDK using pipedal-compatible
+#  compile flags.
+#
+#  The current build supports only Linux builds. Refer to the 
+#  original VST3 SDK build for details on how to build 
+#  for other platforms.
+#
+#########################################################
+if(ENABLE_VST3)
+
+    set (VST3_SRCPATH "${VST3PATH}/public.sdk/source")
+
+    set (VST3_BASEPATH "${VST3PATH}/base")
+    set (VST3_PLUGININTERFACES_BASE_PATH "${VST3PATH}/pluginterfaces/base")
+
+    set(vst3_sources
+
+
+        ${VST3_SRCPATH}/vst/vstpresetfile.cpp
+        ${VST3_SRCPATH}/vst/vstpresetfile.h
+
+        # base files.
+
+
+        ${VST3_BASEPATH}/source/baseiids.cpp
+        ${VST3_BASEPATH}/source/classfactoryhelpers.h
+        ${VST3_BASEPATH}/source/fbuffer.cpp
+        ${VST3_BASEPATH}/source/fbuffer.h
+        ${VST3_BASEPATH}/source/fcleanup.h
+        ${VST3_BASEPATH}/source/fcommandline.h
+        ${VST3_BASEPATH}/source/fdebug.cpp
+        ${VST3_BASEPATH}/source/fdebug.h
+        ${VST3_BASEPATH}/source/fdynlib.cpp
+        ${VST3_BASEPATH}/source/fdynlib.h
+        ${VST3_BASEPATH}/source/fobject.cpp
+        ${VST3_BASEPATH}/source/fobject.h
+        ${VST3_BASEPATH}/source/fstreamer.cpp
+        ${VST3_BASEPATH}/source/fstreamer.h
+        ${VST3_BASEPATH}/source/fstring.cpp
+        ${VST3_BASEPATH}/source/fstring.h
+        ${VST3_BASEPATH}/source/timer.cpp
+        ${VST3_BASEPATH}/source/timer.h
+        ${VST3_BASEPATH}/source/updatehandler.cpp
+        ${VST3_BASEPATH}/source/updatehandler.h
+    
+        ${VST3_BASEPATH}/thread/include/fcondition.h
+        ${VST3_BASEPATH}/thread/include/flock.h
+        ${VST3_BASEPATH}/thread/source/fcondition.cpp
+        ${VST3_BASEPATH}/thread/source/flock.cpp
+    
+
+
+        # sdk_common files.
+        ${VST3_SRCPATH}/common/commoniids.cpp
+        ${VST3_SRCPATH}/common/openurl.cpp
+        ${VST3_SRCPATH}/common/openurl.h
+        ${VST3_SRCPATH}/common/systemclipboard.h
+        ${VST3_SRCPATH}/common/systemclipboard_win32.cpp
+        ${VST3_SRCPATH}/common/threadchecker_linux.cpp
+        ${VST3_SRCPATH}/common/threadchecker_win32.cpp
+        ${VST3_SRCPATH}/common/threadchecker.h
+        ${VST3_SRCPATH}/common/memorystream.cpp
+        ${VST3_SRCPATH}/common/memorystream.h
+
+        # pluginterfaces
+        ${VST3_PLUGININTERFACES_BASE_PATH}/conststringtable.cpp
+        ${VST3_PLUGININTERFACES_BASE_PATH}/conststringtable.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/coreiids.cpp
+        ${VST3_PLUGININTERFACES_BASE_PATH}/falignpop.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/falignpush.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/fplatform.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/fstrdefs.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ftypes.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/funknown.cpp
+        ${VST3_PLUGININTERFACES_BASE_PATH}/funknown.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/funknownimpl.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/futils.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/fvariant.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/geoconstants.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ibstream.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/icloneable.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ierrorcontext.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ipersistent.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ipluginbase.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/istringresult.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/iupdatehandler.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/keycodes.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/pluginbasefwd.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/smartpointer.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/typesizecheck.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ucolorspec.h
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ustring.cpp
+        ${VST3_PLUGININTERFACES_BASE_PATH}/ustring.h
+    
+
+        # sdk files.
+        # ${VST3_SRCPATH}/main/moduleinit.cpp
+        # ${VST3_SRCPATH}/main/moduleinit.h
+        ${VST3_SRCPATH}/vst/utility/audiobuffers.h
+        ${VST3_SRCPATH}/vst/utility/processcontextrequirements.h
+        ${VST3_SRCPATH}/vst/utility/processdataslicer.h
+        ${VST3_SRCPATH}/vst/utility/ringbuffer.h
+        ${VST3_SRCPATH}/vst/utility/rttransfer.h
+        ${VST3_SRCPATH}/vst/utility/sampleaccurate.h
+        ${VST3_SRCPATH}/vst/utility/stringconvert.cpp
+        ${VST3_SRCPATH}/vst/utility/stringconvert.h
+        ${VST3_SRCPATH}/vst/utility/testing.cpp
+        ${VST3_SRCPATH}/vst/utility/testing.h
+        ${VST3_SRCPATH}/vst/utility/vst2persistence.h
+        ${VST3_SRCPATH}/vst/utility/vst2persistence.cpp
+        ${VST3_SRCPATH}/vst/vstaudioeffect.cpp
+        ${VST3_SRCPATH}/vst/vstaudioeffect.h
+        ${VST3_SRCPATH}/vst/vstbus.cpp
+        ${VST3_SRCPATH}/vst/vstbus.h
+        ${VST3_SRCPATH}/vst/vstbypassprocessor.h
+        ${VST3_SRCPATH}/vst/vstcomponent.cpp
+        ${VST3_SRCPATH}/vst/vstcomponent.h
+        ${VST3_SRCPATH}/vst/vstcomponentbase.cpp
+        ${VST3_SRCPATH}/vst/vstcomponentbase.h
+        ${VST3_SRCPATH}/vst/vsteditcontroller.cpp
+        ${VST3_SRCPATH}/vst/vsteditcontroller.h
+        ${VST3_SRCPATH}/vst/vsteventshelper.h
+        ${VST3_SRCPATH}/vst/vsthelpers.h
+        ${VST3_SRCPATH}/vst/vstinitiids.cpp
+        ${VST3_SRCPATH}/vst/vstnoteexpressiontypes.cpp
+        ${VST3_SRCPATH}/vst/vstnoteexpressiontypes.h
+        ${VST3_SRCPATH}/vst/vstparameters.cpp
+        ${VST3_SRCPATH}/vst/vstparameters.h
+        ${VST3_SRCPATH}/vst/vstrepresentation.cpp
+        ${VST3_SRCPATH}/vst/vstrepresentation.h
+
+        # sdk_host.a files.
+
+        ${VST3_SRCPATH}/vst/hosting/connectionproxy.cpp
+        ${VST3_SRCPATH}/vst/hosting/connectionproxy.h
+        ${VST3_SRCPATH}/vst/hosting/eventlist.cpp
+        ${VST3_SRCPATH}/vst/hosting/eventlist.h
+        ${VST3_SRCPATH}/vst/hosting/hostclasses.cpp
+        ${VST3_SRCPATH}/vst/hosting/hostclasses.h
+        ${VST3_SRCPATH}/vst/hosting/module.cpp
+        ${VST3_SRCPATH}/vst/hosting/module.h
+        ${VST3_SRCPATH}/vst/hosting/parameterchanges.cpp
+        ${VST3_SRCPATH}/vst/hosting/parameterchanges.h 
+        ${VST3_SRCPATH}/vst/hosting/pluginterfacesupport.cpp
+        ${VST3_SRCPATH}/vst/hosting/pluginterfacesupport.h
+        ${VST3_SRCPATH}/vst/hosting/plugprovider.cpp
+        ${VST3_SRCPATH}/vst/hosting/plugprovider.h
+        ${VST3_SRCPATH}/vst/hosting/processdata.cpp
+        ${VST3_SRCPATH}/vst/hosting/processdata.h
+        ${VST3_SRCPATH}/vst/utility/optional.h
+        ${VST3_SRCPATH}/vst/utility/stringconvert.cpp
+        ${VST3_SRCPATH}/vst/utility/stringconvert.h
+        ${VST3_SRCPATH}/vst/utility/uid.h
+        ${VST3_SRCPATH}/vst/vstinitiids.cpp
+
+        ${VST3_SRCPATH}/vst/hosting/module_linux.cpp
+
+    # source/audiohost.cpp
+    # source/audiohost.h
+    # source/media/audioclient.cpp
+    # ource/media/audioclient.h
+    # source/media/imediaserver.h
+    # source/media/iparameterclient.h
+    # #source/media/jack/jackclient.cpp
+    # source/media/miditovst.h
+    # source/platform/appinit.h
+    # source/usediids.cpp
+    )
+
+    add_library(vst3_lib STATIC ${vst3_sources})
+
+    target_include_directories(vst3_lib PRIVATE  ${VST3_INCLUDES}
+    )
+
+    
+    add_executable(vst3test Vst3test.cpp
+
+        MemDebug.cpp
+        MemDebug.hpp
+
+        Vst3SdkRepro.cpp
+
+        ${VST3_FILES}
+    
+        #vst3/Vst3PresetFile.hpp Vst3PresetFile.cpp
+        asan_options.cpp
+    )
+
+    target_include_directories(vst3test PRIVATE ${PIPEDAL_INCLUDES} 
+        )
+
+    
+    target_link_libraries(vst3test PRIVATE ${PIPEDAL_LIBS} 
+        vst3_lib dl pthread
+        )
+
+endif(ENABLE_VST3)
+
+
+
+
 # Build machine tests. Run tests that are not dependent on hardware.
 add_test(NAME BuildTest COMMAND pipedaltest "[Build]")
 

src/IEffect.hpp

@@ -23,11 +23,12 @@
 
 namespace pipedal {
     class RealtimeParameterRequest;
+    class RealtimeRingBufferWriter;
 
     class IEffect {
     public:
         virtual ~IEffect() {}
-        virtual long GetInstanceId() const = 0;
+        virtual uint64_t GetInstanceId() const = 0;
         virtual int GetControlIndex(const std::string&symbol) const = 0;
         virtual void SetControl(int index, float value)  = 0;
         virtual float GetControlValue(int index) const = 0;
@@ -35,6 +36,7 @@ namespace pipedal {
         virtual float GetOutputControlValue(int controlIndex) const = 0;
 
 
+
         virtual int GetNumberOfInputAudioPorts() const = 0;
         virtual int GetNumberOfOutputAudioPorts() const = 0;
         virtual float *GetAudioInputBuffer(int index) const = 0;
@@ -43,13 +45,19 @@ namespace pipedal {
         virtual void RequestParameter(LV2_URID uridUri) = 0;
         virtual void GatherParameter(RealtimeParameterRequest*pRequest) = 0;
 
-        virtual std::string AtomToJson(uint8_t*pAtom) = 0;
+        //virtual std::string AtomToJson(uint8_t*pAtom) = 0;
-        virtual std::string GetAtomObjectType(uint8_t*pData) = 0;
+        //virtual std::string GetAtomObjectType(uint8_t*pData) = 0;
 
 
+        virtual void SetAudioInputBuffer(int index, float *buffer) = 0;
         virtual void SetAudioOutputBuffer(int index, float*buffer) = 0;
 
         virtual void Activate() = 0;
+
+        virtual void Run(uint32_t samples, RealtimeRingBufferWriter *realtimeRingBufferWriter) = 0;
+
         virtual void Deactivate() = 0;
+
+        virtual bool IsVst3() const = 0;
     };
 } //namespace

src/JackHost.cpp

@@ -106,6 +106,73 @@ static std::string GetGovernor()
 class JackHostImpl : public JackHost, private AudioDriverHost
 {
 private:
+    IHost *pHost = nullptr;
+
+        class Uris
+        {
+        public:
+            Uris(IHost *pHost)
+            {
+                atom_Blank = pHost->GetLv2Urid(LV2_ATOM__Blank);
+                atom_Path = pHost->GetLv2Urid(LV2_ATOM__Path);
+                atom_float = pHost->GetLv2Urid(LV2_ATOM__Float);
+                atom_Double = pHost->GetLv2Urid(LV2_ATOM__Double);
+                atom_Int = pHost->GetLv2Urid(LV2_ATOM__Int);
+                atom_Long = pHost->GetLv2Urid(LV2_ATOM__Long);
+                atom_Bool = pHost->GetLv2Urid(LV2_ATOM__Bool);
+                atom_String = pHost->GetLv2Urid(LV2_ATOM__String);
+                atom_Vector = pHost->GetLv2Urid(LV2_ATOM__Vector);
+                atom_Object = pHost->GetLv2Urid(LV2_ATOM__Object);
+
+
+                atom_Sequence = pHost->GetLv2Urid(LV2_ATOM__Sequence);
+                atom_Chunk = pHost->GetLv2Urid(LV2_ATOM__Chunk);
+                atom_URID = pHost->GetLv2Urid(LV2_ATOM__URID);
+                atom_eventTransfer = pHost->GetLv2Urid(LV2_ATOM__eventTransfer);
+                patch_Get = pHost->GetLv2Urid(LV2_PATCH__Get);
+                patch_Set = pHost->GetLv2Urid(LV2_PATCH__Set);
+                patch_Put = pHost->GetLv2Urid(LV2_PATCH__Put);
+                patch_body = pHost->GetLv2Urid(LV2_PATCH__body);
+                patch_subject = pHost->GetLv2Urid(LV2_PATCH__subject);
+                patch_property = pHost->GetLv2Urid(LV2_PATCH__property);
+                //patch_accept = pHost->GetLv2Urid(LV2_PATCH__accept);
+                patch_value = pHost->GetLv2Urid(LV2_PATCH__value);
+                unitsFrame = pHost->GetLv2Urid(LV2_UNITS__frame);
+
+            }
+            //LV2_URID patch_accept;
+
+            LV2_URID unitsFrame;
+            LV2_URID pluginUri;
+            LV2_URID atom_Blank;
+            LV2_URID atom_Bool;
+            LV2_URID atom_float;
+            LV2_URID atom_Double;
+            LV2_URID atom_Int;
+            LV2_URID atom_Long;
+            LV2_URID atom_String;
+            LV2_URID atom_Object;
+            LV2_URID atom_Vector;
+            LV2_URID atom_Path;
+            LV2_URID atom_Sequence;
+            LV2_URID atom_Chunk;
+            LV2_URID atom_URID;
+            LV2_URID atom_eventTransfer;
+            LV2_URID midi_Event;
+            LV2_URID patch_Get;
+            LV2_URID patch_Set;
+            LV2_URID patch_Put;
+            LV2_URID patch_body;
+            LV2_URID patch_subject;
+            LV2_URID patch_property;
+            LV2_URID patch_value;
+            LV2_URID param_uiState;
+        };
+
+        Uris uris;
+
+
+
     AudioDriver*audioDriver = nullptr;
 
     inherit_priority_recursive_mutex mutex;
@@ -146,6 +213,30 @@ private:
     std::atomic<std::chrono::system_clock::time_point> lastUnderrunTime =
         std::chrono::system_clock::from_time_t(0);
 
+
+    std::string GetAtomObjectType(uint8_t*pData)
+    {
+        LV2_Atom_Object *pAtom = (LV2_Atom_Object*)pData;
+        if (pAtom->atom.type != uris.atom_Object)
+        {
+            throw std::invalid_argument("Not an Lv2 Object");
+        }
+        return pHost->Lv2UriudToString(pAtom->body.otype);
+
+    }
+
+    void WriteAtom(json_writer &writer, LV2_Atom*pAtom);
+
+    std::string AtomToJson(uint8_t*pData)
+    {
+        std::stringstream s;
+        json_writer writer(s);
+        LV2_Atom *pAtom = (LV2_Atom*)pData;
+
+        WriteAtom(writer,pAtom);
+        return s.str();
+    }
+
     virtual void OnUnderrun()
     {
         ++this->underruns;
@@ -582,7 +673,6 @@ private:
         }
 
     }
-
     
 public:
     JackHostImpl(IHost *pHost)
@@ -592,7 +682,9 @@ public:
           realtimeWriter(&this->outputRingBuffer),
           hostReader(&this->outputRingBuffer),
           hostWriter(&this->inputRingBuffer),
-          eventBufferUrids(pHost)
+          eventBufferUrids(pHost),
+          pHost(pHost),
+          uris(pHost)
     {
 
         #if JACK_HOST 
@@ -758,7 +850,7 @@ public:
                                         }
                                         else
                                         {
-                                            pRequest->jsonResponse = pEffect->AtomToJson(pRequest->response);
+                                            pRequest->jsonResponse = AtomToJson(pRequest->response);
                                         }
                                     }
                                     pRequest->onJackRequestComplete(pRequest);
@@ -802,8 +894,8 @@ public:
                                 IEffect *pEffect = currentPedalBoard->GetEffect(instanceId);
                                 if (pEffect != nullptr &&this->pNotifyCallbacks && listenForAtomOutput)
                                 {
-                                    std::string atomType = pEffect->GetAtomObjectType(&atomBuffer[0]);
+                                    std::string atomType = GetAtomObjectType(&atomBuffer[0]);
-                                    auto json  = pEffect->AtomToJson(&(atomBuffer[0]));
+                                    auto json  = AtomToJson(&(atomBuffer[0]));
                                     this->pNotifyCallbacks->OnNotifyAtomOutput(instanceId,atomType,json);
                                 }
                             }
@@ -1275,6 +1367,148 @@ public:
     }
 };
 
+static std::string UriToFieldName(const std::string&uri){
+    int pos;
+    for (pos = uri.length(); pos >= 0; --pos)
+    {
+        char c = uri[pos];
+        if (c == '#' || c == '/' || c == ':')
+        {
+            break;
+        }
+    }
+    return uri.substr(pos+1);
+}
+
+void JackHostImpl::WriteAtom(json_writer &writer, LV2_Atom*pAtom)
+{
+    if (pAtom->type == uris.atom_Blank)
+    {
+        writer.write_raw("null");
+    }
+    else if (pAtom->type == uris.atom_float)
+    {
+        writer.write(
+            ((LV2_Atom_Float*)pAtom)->body
+        );
+
+    } else if (pAtom->type == uris.atom_Int)
+    {
+        writer.write(
+            ((LV2_Atom_Int*)pAtom)->body
+        );
+    } else if (pAtom->type == uris.atom_Long)
+    {
+        writer.write(
+            ((LV2_Atom_Long*)pAtom)->body
+        );
+    } else if (pAtom->type == uris.atom_Double)
+    {
+        writer.write(
+            ((LV2_Atom_Double*)pAtom)->body
+        );
+    } else if (pAtom->type == uris.atom_Bool)
+    {
+        writer.write(
+            ((LV2_Atom_Bool*)pAtom)->body
+        );
+    } else if (pAtom->type == uris.atom_String)
+    {
+        const char *p = (((const char*) pAtom) + sizeof(LV2_Atom_String));
+        writer.write(
+            p
+        );
+    } else if (pAtom->type == uris.atom_Vector)
+    {
+        LV2_Atom_Vector *pVector = (LV2_Atom_Vector*)pAtom;
+        writer.start_array();
+        {
+            size_t n = (pAtom->size-sizeof(pVector->body))/pVector->body.child_size;
+            char *pItems = ((char*)pAtom) + sizeof(LV2_Atom_Vector);
+            if (pVector->body.child_type == uris.atom_float)
+            {
+                float *p = (float*)pItems;
+                for (size_t i = 0; i < n; ++i)
+                {
+                    if (i != 0) writer.write_raw(",");
+                    writer.write(*p++);
+                }
+            } else if (pVector->body.child_type == uris.atom_Int)
+            {
+                int32_t *p = (int32_t*)pItems;
+                for (size_t i = 0; i < n; ++i)
+                {
+                    if (i != 0) writer.write_raw(",");
+                    writer.write(*p++);
+                }
+            } else if (pVector->body.child_type == uris.atom_Long)
+            {
+                int64_t *p = (int64_t*)pItems;
+                for (size_t i = 0; i < n; ++i)
+                {
+                    if (i != 0) writer.write_raw(",");
+                    writer.write(*p++);
+                }
+            } else if (pVector->body.child_type == uris.atom_Double)
+            {
+                double *p = (double*)pItems;
+                for (size_t i = 0; i < n; ++i)
+                {
+                    if (i != 0) writer.write_raw(",");
+                    writer.write(*p++);
+                }
+            } else if (pVector->body.child_type == uris.atom_Bool)
+            {
+                bool *p = (bool*)pItems;
+                for (size_t i = 0; i < n; ++i)
+                {
+                    if (i != 0) writer.write_raw(",");
+                    writer.write(*p++);
+                }
+            }
+        }
+        writer.end_array();
+    } else if (pAtom->type == uris.atom_Object)
+    {
+        writer.start_object();
+
+        const LV2_Atom_Object *obj = (const LV2_Atom_Object *)pAtom;
+        bool firstMember = true;
+        if (obj->body.id != 0)
+        {
+            std::string id = pHost->Lv2UriudToString(obj->body.id);
+            writer.write_member("id",id.c_str());
+            firstMember = false;
+        }
+
+        if (obj->body.otype != 0)
+        {
+            std::string type =  pHost->Lv2UriudToString(obj->body.otype);        
+            writer.write_member("lv2Type",type.c_str());
+            if (!firstMember)
+            {
+                writer.write_raw(",");
+            }
+            firstMember = false;
+        }
+
+        LV2_ATOM_OBJECT_FOREACH (obj, prop) {
+            if (!firstMember) {
+                writer.write_raw(",");
+            }
+            firstMember = false;
+            std::string key = pHost->Lv2UriudToString(prop->key);
+            key = UriToFieldName(key);
+            writer.write(key);
+            writer.write_raw(": ");
+            LV2_Atom *value = &(prop->value);
+            WriteAtom(writer,value);
+        }
+        writer.end_object();
+        
+    }
+
+}
 
 JackHost *JackHost::CreateInstance(IHost *pHost)
 {

src/LiteralVersion.cpp

@@ -0,0 +1,74 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Robin E. R. Davies
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
+#include "LiteralVersion.hpp"
+#include <sstream>
+#include <cctype>
+
+using namespace pipedal;
+
+LiteralVersion::LiteralVersion()
+{
+}
+LiteralVersion::LiteralVersion(const std::string &version)
+{
+    Parse(version);
+}
+
+bool LiteralVersion::Parse(const std::string &version)
+{
+    int ix = 0;
+
+    while (ix < version.length())
+    {
+        char c = version[ix];
+        int n = 0;
+        if (std::isdigit(c))
+        {
+            while (std::isdigit(c))
+            {
+                c = version[ix++];
+                n = c -'0' + n;
+            }
+            this->versionNumbers.push_back(n);
+
+            if (version[ix] == '.')
+            {
+                ++ix;
+            }
+        } else {
+            std::stringstream t;
+
+            while (ix < version.length())
+            {
+                c = version[ix++];
+                t << c;
+            }
+            suffix = t.str();            
+        }
+    }
+
+    return true;
+}

src/LiteralVersion.hpp

@@ -0,0 +1,45 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include <vector>
+#include <string>
+
+namespace pipedal {
+    class LiteralVersion {
+    public:
+        LiteralVersion();
+        LiteralVersion(const std::string&version);
+
+        bool Parse(const std::string&version);
+
+        const std::vector<int> &getVersionNumbers() const { return versionNumbers; }
+        const std::string&getSuffix() const { return suffix; }
+        int compare(const LiteralVersion&other);
+    private:
+        std::vector<int> versionNumbers;
+        std::string suffix;
+    };
+};

src/Lv2Effect.cpp

@@ -216,7 +216,7 @@ void Lv2Effect::SetAudioInputBuffer(int index, float *buffer)
 
 void Lv2Effect::SetAudioInputBuffer(float *left)
 {
-    if (GetNumberOfInputs() > 1)
+    if (GetNumberOfInputAudioPorts() > 1)
     {
         SetAudioInputBuffer(0, left);
         SetAudioInputBuffer(1, left);
@@ -229,7 +229,7 @@ void Lv2Effect::SetAudioInputBuffer(float *left)
 
 void Lv2Effect::SetAudioInputBuffers(float *left, float *right)
 {
-    if (GetNumberOfInputs() == 1)
+    if (GetNumberOfInputAudioPorts() == 1)
     {
         SetAudioInputBuffer(0, left);
     }
@@ -343,7 +343,7 @@ static inline void CopyBuffer(float *input, float *output, uint32_t frames)
     }
 }
 
-void Lv2Effect::Run(uint32_t samples,uint64_t instanceId, RealtimeRingBufferWriter *realtimeRingBufferWriter)
+void Lv2Effect::Run(uint32_t samples,RealtimeRingBufferWriter *realtimeRingBufferWriter)
 {
     // close off the atom input frame.
     if (this->inputAtomBuffers.size() != 0)
@@ -441,7 +441,7 @@ void Lv2Effect::Run(uint32_t samples,uint64_t instanceId, RealtimeRingBufferWrit
         }
         
     }
-    RelayOutputMessages(instanceId,realtimeRingBufferWriter);
+    RelayOutputMessages(this->instanceId,realtimeRingBufferWriter);
 }
 
 LV2_Worker_Status Lv2Effect::worker_schedule_fn(LV2_Worker_Schedule_Handle handle,
@@ -600,164 +600,5 @@ void Lv2Effect::GatherParameter(RealtimeParameterRequest *pRequest)
     }
 }
 
-std::string Lv2Effect::GetAtomObjectType(uint8_t*pData)
-{
-    LV2_Atom_Object *pAtom = (LV2_Atom_Object*)pData;
-    if (pAtom->atom.type != uris.atom_Object)
-    {
-        throw std::invalid_argument("Not an Lv2 Object");
-    }
-    return pHost->Lv2UriudToString(pAtom->body.otype);
 
-}
-std::string Lv2Effect::AtomToJson(uint8_t*pData)
-{
-    std::stringstream s;
-    json_writer writer(s);
-    LV2_Atom *pAtom = (LV2_Atom*)pData;
 
-    WriteAtom(writer,pAtom);
-    return s.str();
-}
-
-static std::string UriToFieldName(const std::string&uri){
-    int pos;
-    for (pos = uri.length(); pos >= 0; --pos)
-    {
-        char c = uri[pos];
-        if (c == '#' || c == '/' || c == ':')
-        {
-            break;
-        }
-    }
-    return uri.substr(pos+1);
-}
-void Lv2Effect::WriteAtom(json_writer &writer, LV2_Atom*pAtom)
-{
-    if (pAtom->type == uris.atom_Blank)
-    {
-        writer.write_raw("null");
-    }
-    else if (pAtom->type == uris.atom_float)
-    {
-        writer.write(
-            ((LV2_Atom_Float*)pAtom)->body
-        );
-
-    } else if (pAtom->type == uris.atom_Int)
-    {
-        writer.write(
-            ((LV2_Atom_Int*)pAtom)->body
-        );
-    } else if (pAtom->type == uris.atom_Long)
-    {
-        writer.write(
-            ((LV2_Atom_Long*)pAtom)->body
-        );
-    } else if (pAtom->type == uris.atom_Double)
-    {
-        writer.write(
-            ((LV2_Atom_Double*)pAtom)->body
-        );
-    } else if (pAtom->type == uris.atom_Bool)
-    {
-        writer.write(
-            ((LV2_Atom_Bool*)pAtom)->body
-        );
-    } else if (pAtom->type == uris.atom_String)
-    {
-        const char *p = (((const char*) pAtom) + sizeof(LV2_Atom_String));
-        writer.write(
-            p
-        );
-    } else if (pAtom->type == uris.atom_Vector)
-    {
-        LV2_Atom_Vector *pVector = (LV2_Atom_Vector*)pAtom;
-        writer.start_array();
-        {
-            size_t n = (pAtom->size-sizeof(pVector->body))/pVector->body.child_size;
-            char *pItems = ((char*)pAtom) + sizeof(LV2_Atom_Vector);
-            if (pVector->body.child_type == uris.atom_float)
-            {
-                float *p = (float*)pItems;
-                for (size_t i = 0; i < n; ++i)
-                {
-                    if (i != 0) writer.write_raw(",");
-                    writer.write(*p++);
-                }
-            } else if (pVector->body.child_type == uris.atom_Int)
-            {
-                int32_t *p = (int32_t*)pItems;
-                for (size_t i = 0; i < n; ++i)
-                {
-                    if (i != 0) writer.write_raw(",");
-                    writer.write(*p++);
-                }
-            } else if (pVector->body.child_type == uris.atom_Long)
-            {
-                int64_t *p = (int64_t*)pItems;
-                for (size_t i = 0; i < n; ++i)
-                {
-                    if (i != 0) writer.write_raw(",");
-                    writer.write(*p++);
-                }
-            } else if (pVector->body.child_type == uris.atom_Double)
-            {
-                double *p = (double*)pItems;
-                for (size_t i = 0; i < n; ++i)
-                {
-                    if (i != 0) writer.write_raw(",");
-                    writer.write(*p++);
-                }
-            } else if (pVector->body.child_type == uris.atom_Bool)
-            {
-                bool *p = (bool*)pItems;
-                for (size_t i = 0; i < n; ++i)
-                {
-                    if (i != 0) writer.write_raw(",");
-                    writer.write(*p++);
-                }
-            }
-        }
-        writer.end_array();
-    } else if (pAtom->type == uris.atom_Object)
-    {
-        writer.start_object();
-
-        const LV2_Atom_Object *obj = (const LV2_Atom_Object *)pAtom;
-        bool firstMember = true;
-        if (obj->body.id != 0)
-        {
-            std::string id = pHost->Lv2UriudToString(obj->body.id);
-            writer.write_member("id",id.c_str());
-            firstMember = false;
-        }
-
-        if (obj->body.otype != 0)
-        {
-            std::string type =  pHost->Lv2UriudToString(obj->body.otype);        
-            writer.write_member("lv2Type",type.c_str());
-            if (!firstMember)
-            {
-                writer.write_raw(",");
-            }
-            firstMember = false;
-        }
-
-        LV2_ATOM_OBJECT_FOREACH (obj, prop) {
-            if (!firstMember) {
-                writer.write_raw(",");
-            }
-            firstMember = false;
-            std::string key = pHost->Lv2UriudToString(prop->key);
-            key = UriToFieldName(key);
-            writer.write(key);
-            writer.write_raw(": ");
-            LV2_Atom *value = &(prop->value);
-            WriteAtom(writer,value);
-        }
-        writer.end_object();
-        
-    }
-
-}

src/Lv2Effect.hpp

@@ -20,7 +20,7 @@
 
 #pragma once
 
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 #include "PedalBoard.hpp"
 #include <lilv/lilv.h>
 #include "BufferPool.hpp"
@@ -82,7 +82,6 @@ namespace pipedal
 
         LV2_Atom_Forge outputForgeRt;
 
-        void WriteAtom(json_writer &writer, LV2_Atom*pAtom);
 
         class Uris
         {
@@ -167,9 +166,10 @@ namespace pipedal
 
         void BypassTo(float value);
 
+
         virtual void RequestParameter(LV2_URID uridUri);
         virtual void GatherParameter(RealtimeParameterRequest*pRequest);
-
+        virtual bool IsVst3() const { return false; }
         virtual void RelayOutputMessages(uint64_t instanceId,RealtimeRingBufferWriter *realtimeRingBufferWriter);
 
         virtual uint8_t*GetAtomInputBuffer() {
@@ -182,10 +182,6 @@ namespace pipedal
             return (uint8_t*)this->outputAtomBuffers[0];
 
         }
-        virtual std::string AtomToJson(uint8_t*pAtom);
-        virtual std::string GetAtomObjectType(uint8_t*pData);
-
-
 
 
     public:
@@ -196,29 +192,30 @@ namespace pipedal
         ~Lv2Effect();
 
 
+
         virtual void ResetAtomBuffers();
-        virtual long GetInstanceId() const { return instanceId; }
+        virtual uint64_t GetInstanceId() const { return instanceId; }
         virtual int GetNumberOfInputAudioPorts() const { return inputAudioPortIndices.size(); }
         virtual int GetNumberOfOutputAudioPorts() const { return outputAudioPortIndices.size(); }
-        int GetNumberOfInputAtomPorts() const { return inputAtomPortIndices.size(); }
+        virtual int GetNumberOfInputAtomPorts() const { return inputAtomPortIndices.size(); }
-        int GetNumberOfOutputAtomPorts() const { return outputAtomPortIndices.size(); }
+        virtual int GetNumberOfOutputAtomPorts() const { return outputAtomPortIndices.size(); }
-        int GetNumberOfMidiInputPorts() const { return inputMidiPortIndices.size(); }
+        virtual int GetNumberOfMidiInputPorts() const { return inputMidiPortIndices.size(); }
-        int GetNumberOfMidiOutputPorts() const { return outputMidiPortIndices.size(); }
+        virtual int GetNumberOfMidiOutputPorts() const { return outputMidiPortIndices.size(); }
 
         virtual void SetAudioInputBuffer(int index, float *buffer);
-        float *GetAudioInputBuffer(int index) const { return this->inputAudioBuffers[index]; }
+        virtual float *GetAudioInputBuffer(int index) const { return this->inputAudioBuffers[index]; }
 
-        void SetAudioInputBuffer(float *buffer);
+        virtual void SetAudioInputBuffer(float *buffer);
-        void SetAudioInputBuffers(float *left, float *right);
+        virtual void SetAudioInputBuffers(float *left, float *right);
 
         virtual void SetAudioOutputBuffer(int index, float *buffer);
-        float *GetAudioOutputBuffer(int index) const { return this->outputAudioBuffers[index]; }
+        virtual float *GetAudioOutputBuffer(int index) const { return this->outputAudioBuffers[index]; }
 
-        void SetAtomInputBuffer(int index, void *buffer);
+        virtual void SetAtomInputBuffer(int index, void *buffer) { this->inputAtomBuffers[index] = (char*)buffer;}
-        void *GetAtomInputBuffer(int index) const { return this->inputAtomBuffers[index]; }
+        virtual void *GetAtomInputBuffer(int index) const { return this->inputAtomBuffers[index]; }
 
-        void SetAtomOutputBuffer(int index, void *buffer);
+        virtual void SetAtomOutputBuffer(int index, void *buffer) { this->outputAtomBuffers[index] = (char*)buffer; }
-        void *GetAtomOutputBuffer(int index) const { return this->outputAtomBuffers[index]; }
+        virtual void *GetAtomOutputBuffer(int index) const { return this->outputAtomBuffers[index]; }
 
         virtual int GetControlIndex(const std::string &symbol) const;
 
@@ -254,22 +251,10 @@ namespace pipedal
             }
 
         }
-        int GetNumberOfInputs() const
-        {
-            return this->inputAudioPortIndices.size();
-        }
-        int GetNumberOfOutputs() const
-        {
-            return this->outputAudioPortIndices.size();
-        }
-        int GetNumberOfMidiInputs() const
-        {
-            return this->inputMidiPortIndices.size();
-        }
 
-        void Activate();
+        virtual void Activate();
-        void Run(uint32_t samples, uint64_t instanceId,RealtimeRingBufferWriter *realtimeRingBufferWriter);
+        virtual void Run(uint32_t samples, RealtimeRingBufferWriter *realtimeRingBufferWriter);
-        void Deactivate();
+        virtual void Deactivate();
     };
 
 } // namespace

src/Lv2EventBufferWriter.cpp

@@ -19,7 +19,7 @@
 
 #include "pch.h"
 #include "Lv2EventBufferWriter.hpp"
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 
 
 using namespace pipedal;

src/Lv2HostLeakTest.cpp

@@ -24,17 +24,17 @@
 #include <string>
 
 
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 #include "MemDebug.hpp"
 
 using namespace pipedal;
 
 
-TEST_CASE( "Lv2Host memory leak", "[lv2host_leak][Build][Dev]" ) {
+TEST_CASE( "PiPedalHost memory leak", "[lv2host_leak][Build][Dev]" ) {
 
     MemStats initialMemory = GetMemStats();
     {
-        Lv2Host host;
+        PiPedalHost host;
 
         host.Load("/usr/lib/lv2:/usr/local/lib/lv2:/usr/modep/lv2");
     }

src/Lv2PedalBoard.cpp

@@ -21,6 +21,7 @@
 #include "Lv2PedalBoard.hpp"
 #include "Lv2Effect.hpp"
 
+
 #include "SplitEffect.hpp"
 #include "RingBufferReader.hpp"
 #include "VuUpdate.hpp"
@@ -57,7 +58,7 @@ int Lv2PedalBoard::GetControlIndex(uint64_t instanceId, const std::string &symbo
     return -1;
 }
 std::vector<float *> Lv2PedalBoard::PrepareItems(
-    const std::vector<PedalBoardItem> &items,
+    std::vector<PedalBoardItem> &items,
     std::vector<float *> inputBuffers)
 {
     for (int i = 0; i < items.size(); ++i)
@@ -142,9 +143,9 @@ std::vector<float *> Lv2PedalBoard::PrepareItems(
                     }
 
                     this->processActions.push_back(
-                        [pLv2Effect,this,instanceId](uint32_t frames)
+                        [pLv2Effect,this](uint32_t frames)
                         {
-                            pLv2Effect->Run(frames,instanceId,this->ringBufferWriter);
+                            pLv2Effect->Run(frames,this->ringBufferWriter);
                         });
                 }
             }
@@ -197,7 +198,7 @@ std::vector<float *> Lv2PedalBoard::PrepareItems(
     return inputBuffers;
 }
 
-void Lv2PedalBoard::Prepare(IHost *pHost, const PedalBoard &pedalBoard)
+void Lv2PedalBoard::Prepare(IHost *pHost, PedalBoard &pedalBoard)
 {
     this->pHost = pHost;
 

src/Lv2PedalBoard.hpp

@@ -19,7 +19,7 @@
 
 #pragma once
 #include "PedalBoard.hpp"
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 #include "Lv2Effect.hpp"
 #include "BufferPool.hpp"
 #include <functional>
@@ -81,7 +81,7 @@ class Lv2PedalBoard {
 
 
     std::vector<float*> PrepareItems(
-        const std::vector<PedalBoardItem> & items,
+        std::vector<PedalBoardItem> & items,
         std::vector<float*> inputBuffers
         );
 
@@ -95,7 +95,9 @@ public:
     Lv2PedalBoard() { }
     ~Lv2PedalBoard() { }
 
-    void Prepare(IHost *pHost,const PedalBoard&pedalBoard);
+    void Prepare(IHost *pHost,PedalBoard&pedalBoard);
+
+    std::vector<IEffect* > GetEffects() { return realtimeEffects; }
 
     int GetIndexOfInstanceId(uint64_t instanceId) {
         for (int i = 0; i < this->realtimeEffects.size(); ++i)

src/PedalBoard.hpp

@@ -82,10 +82,12 @@ class PedalBoardItem: public JsonWritable {
     std::vector<PedalBoardItem> topChain_;
     std::vector<PedalBoardItem> bottomChain_;
     std::vector<MidiBinding> midiBindings_;
+    std::string vstState_;
 public:
     ControlValue*GetControlValue(const std::string&symbol);
     GETTER_SETTER(instanceId)
     GETTER_SETTER_REF(uri)
+    GETTER_SETTER_REF(vstState);
     GETTER_SETTER_REF(pluginName)
     GETTER_SETTER(isEnabled)
     GETTER_SETTER_VEC(controlValues)

src/PiPedalConfiguration.cpp

@@ -36,4 +36,5 @@ JSON_MAP_REFERENCE(PiPedalConfiguration, logHttpRequests)
 JSON_MAP_REFERENCE(PiPedalConfiguration, maxUploadSize)
 JSON_MAP_REFERENCE(PiPedalConfiguration, accessPointGateway)
 JSON_MAP_REFERENCE(PiPedalConfiguration, accessPointServerAddress)
+JSON_MAP_REFERENCE(PiPedalConfiguration, isVst3Enabled)
 JSON_MAP_END()

src/PiPedalConfiguration.hpp

@@ -47,9 +47,10 @@ private:
     uint64_t maxUploadSize_ = 1024*1024;
     std::string accessPointGateway_;
     std::string accessPointServerAddress_;
+    bool isVst3Enabled_ = true;
 
 public:
-
+    bool IsVst3Enabled() const { return isVst3Enabled_; }
     std::filesystem::path GetConfigFilePath() const {
         return docRoot_ / "config.jason";
     }

src/PiPedalHost.cpp

@@ -18,7 +18,7 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include "pch.h"
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 #include <lilv/lilv.h>
 #include <stdexcept>
 #include <locale>
@@ -85,7 +85,7 @@ namespace pipedal
     static const char *LV2_MIDI_EVENT = "http://lv2plug.in/ns/ext/midi#MidiEvent";
     static const char *LV2_DESIGNATION = "http://lv2plug.in/ns/lv2core#Designation";
 
-    class Lv2Host::Urids
+    class PiPedalHost::Urids
     {
     public:
         Urids(MapFeature &mapFeature)
@@ -96,9 +96,17 @@ namespace pipedal
     };
 }
 
-void Lv2Host::LilvUris::Initialize(LilvWorld *pWorld)
+void PiPedalHost::SetConfiguration(const PiPedalConfiguration &configuration)
 {
-    rdfsComment = lilv_new_uri(pWorld, Lv2Host::RDFS_COMMENT_URI);
+    this->vst3CachePath =
+        std::filesystem::path(configuration.GetLocalStoragePath()) / "vst3cache.json";
+    this->vst3Enabled = configuration.IsVst3Enabled();
+}
+
+
+void PiPedalHost::LilvUris::Initialize(LilvWorld *pWorld)
+{
+    rdfsComment = lilv_new_uri(pWorld, PiPedalHost::RDFS_COMMENT_URI);
     logarithic_uri = lilv_new_uri(pWorld, LV2_PORT_LOGARITHMIC);
     display_priority_uri = lilv_new_uri(pWorld, LV2_PORT_DISPLAY_PRIORITY);
     range_steps_uri = lilv_new_uri(pWorld, LV2_PORT_RANGE_STEPS);
@@ -124,7 +132,7 @@ void Lv2Host::LilvUris::Initialize(LilvWorld *pWorld)
     appliesTo = lilv_new_uri(pWorld, LV2_CORE__appliesTo);
 }
 
-void Lv2Host::LilvUris::Free()
+void PiPedalHost::LilvUris::Free()
 {
     rdfsComment.Free();
     logarithic_uri.Free();
@@ -242,7 +250,7 @@ public:
     }
 };
 
-Lv2Host::Lv2Host()
+PiPedalHost::PiPedalHost()
 {
     pWorld = nullptr;
 
@@ -260,7 +268,7 @@ Lv2Host::Lv2Host()
     this->urids = new Urids(mapFeature);
 }
 
-void Lv2Host::OnConfigurationChanged(const JackConfiguration &configuration, const JackChannelSelection &settings)
+void PiPedalHost::OnConfigurationChanged(const JackConfiguration &configuration, const JackChannelSelection &settings)
 {
     this->sampleRate = configuration.GetSampleRate();
     if (configuration.isValid())
@@ -272,7 +280,7 @@ void Lv2Host::OnConfigurationChanged(const JackConfiguration &configuration, con
     }
 }
 
-Lv2Host::~Lv2Host()
+PiPedalHost::~PiPedalHost()
 {
     delete[] lv2Features;
     lilvUris.Free();
@@ -280,7 +288,7 @@ Lv2Host::~Lv2Host()
     delete urids;
 }
 
-void Lv2Host::free_world()
+void PiPedalHost::free_world()
 {
     if (pWorld)
     {
@@ -288,7 +296,7 @@ void Lv2Host::free_world()
         pWorld = nullptr;
     }
 }
-std::shared_ptr<Lv2PluginClass> Lv2Host::GetPluginClass(const std::string &uri) const
+std::shared_ptr<Lv2PluginClass> PiPedalHost::GetPluginClass(const std::string &uri) const
 {
     auto it = this->classesMap.find(uri);
     if (it == this->classesMap.end())
@@ -296,7 +304,7 @@ std::shared_ptr<Lv2PluginClass> Lv2Host::GetPluginClass(const std::string &uri)
     return (*it).second;
 }
 
-void Lv2Host::AddJsonClassesToMap(std::shared_ptr<Lv2PluginClass> pluginClass)
+void PiPedalHost::AddJsonClassesToMap(std::shared_ptr<Lv2PluginClass> pluginClass)
 {
     this->classesMap[pluginClass->uri()] = pluginClass;
     for (int i = 0; i < pluginClass->children_.size(); ++i)
@@ -306,7 +314,7 @@ void Lv2Host::AddJsonClassesToMap(std::shared_ptr<Lv2PluginClass> pluginClass)
         child->parent_ = pluginClass.get();
     }
 }
-void Lv2Host::LoadPluginClassesFromJson(std::filesystem::path jsonFile)
+void PiPedalHost::LoadPluginClassesFromJson(std::filesystem::path jsonFile)
 {
     std::ifstream f(jsonFile);
     json_reader reader(f);
@@ -320,7 +328,7 @@ void Lv2Host::LoadPluginClassesFromJson(std::filesystem::path jsonFile)
     MAP_CHECK();
 }
 
-std::shared_ptr<Lv2PluginClass> Lv2Host::GetPluginClass(const LilvPluginClass *pClass)
+std::shared_ptr<Lv2PluginClass> PiPedalHost::GetPluginClass(const LilvPluginClass *pClass)
 {
     MAP_CHECK();
 
@@ -328,7 +336,7 @@ std::shared_ptr<Lv2PluginClass> Lv2Host::GetPluginClass(const LilvPluginClass *p
     std::shared_ptr<Lv2PluginClass> pResult = this->classesMap[uri];
     return pResult;
 }
-std::shared_ptr<Lv2PluginClass> Lv2Host::MakePluginClass(const LilvPluginClass *pClass)
+std::shared_ptr<Lv2PluginClass> PiPedalHost::MakePluginClass(const LilvPluginClass *pClass)
 {
     std::string uri = nodeAsString(lilv_plugin_class_get_uri(pClass));
     auto t = this->classesMap.find(uri);
@@ -348,7 +356,7 @@ std::shared_ptr<Lv2PluginClass> Lv2Host::MakePluginClass(const LilvPluginClass *
     return result;
 }
 
-void Lv2Host::LoadPluginClassesFromLilv()
+void PiPedalHost::LoadPluginClassesFromLilv()
 {
     const auto classes = lilv_world_get_plugin_classes(pWorld);
 
@@ -378,7 +386,7 @@ void Lv2Host::LoadPluginClassesFromLilv()
     }
 }
 
-void Lv2Host::Load(const char *lv2Path)
+void PiPedalHost::Load(const char *lv2Path)
 {
 
     this->plugins_.clear();
@@ -390,13 +398,14 @@ void Lv2Host::Load(const char *lv2Path)
 
     free_world();
 
+    Lv2Log::info("Scanning for LV2 Plugins");
+
     setenv("LV2_PATH", lv2Path, true);
-    StdErrorCapture stdoutCapture;  // captures lilv messages written to STDOUT.
+    StdErrorCapture stdoutCapture; // captures lilv messages written to STDOUT.
     pWorld = lilv_world_new();
     {
 
         lilv_world_load_all(pWorld);
-
     }
 
     lilvUris.Initialize(pWorld);
@@ -443,7 +452,7 @@ void Lv2Host::Load(const char *lv2Path)
     }
     auto messages = stdoutCapture.GetOutputLines();
 
-    for (const std::string & s: messages)
+    for (const std::string &s : messages)
     {
         Lv2Log::info("lilv: " + s);
     }
@@ -491,8 +500,35 @@ void Lv2Host::Load(const char *lv2Path)
             }
         }
     }
-}
+
-;
+#if ENABLE_VST3
+    if (vst3Enabled)
+    {
+        Lv2Log::info("Scanning for VST3 Plugins");
+        this->vst3Host = Vst3Host::CreateInstance(
+            this->vst3CachePath);
+        this->vst3Host->RefreshPlugins();
+
+        const auto &vst3PluginList = this->vst3Host->getPluginList();
+        for (const auto &vst3Plugin : vst3PluginList)
+        {
+            // copy not move!
+            ui_plugins_.push_back(vst3Plugin->pluginInfo_);
+        }
+        auto ui_compare = [&collation](
+                              Lv2PluginUiInfo &left,
+                              Lv2PluginUiInfo &right)
+        {
+            const char *pb1 = left.name().c_str();
+            const char *pb2 = right.name().c_str();
+            return collation.compare(
+                       pb1, pb1 + left.name().size(),
+                       pb2, pb2 + right.name().size()) < 0;
+        };
+        std::sort(this->ui_plugins_.begin(), this->ui_plugins_.end(), ui_compare);
+    }
+#endif
+};
 
 class NodesAutoFree
 {
@@ -532,10 +568,10 @@ static std::vector<std::string> nodeAsStringArray(const LilvNodes *nodes)
     return result;
 }
 
-const char *Lv2Host::RDFS_COMMENT_URI = "http://www.w3.org/2000/01/rdf-schema#"
+const char *PiPedalHost::RDFS_COMMENT_URI = "http://www.w3.org/2000/01/rdf-schema#"
-                                        "comment";
+                                            "comment";
 
-LilvNode *Lv2Host::get_comment(const std::string &uri)
+LilvNode *PiPedalHost::get_comment(const std::string &uri)
 {
     NodeAutoFree uriNode = lilv_new_uri(pWorld, uri.c_str());
     LilvNode *result = lilv_world_get(pWorld, uriNode, lilvUris.rdfsComment, nullptr);
@@ -547,7 +583,7 @@ static bool ports_sort_compare(std::shared_ptr<Lv2PortInfo> &p1, const std::shar
     return p1->index() < p2->index();
 }
 
-bool Lv2PluginInfo::HasFactoryPresets(Lv2Host *lv2Host, const LilvPlugin *plugin)
+bool Lv2PluginInfo::HasFactoryPresets(PiPedalHost *lv2Host, const LilvPlugin *plugin)
 {
     NodesAutoFree nodes = lilv_plugin_get_related(plugin, lv2Host->lilvUris.pset_Preset);
     bool result = false;
@@ -559,7 +595,7 @@ bool Lv2PluginInfo::HasFactoryPresets(Lv2Host *lv2Host, const LilvPlugin *plugin
     return result;
 }
 
-Lv2PluginInfo::Lv2PluginInfo(Lv2Host *lv2Host, const LilvPlugin *pPlugin)
+Lv2PluginInfo::Lv2PluginInfo(PiPedalHost *lv2Host, const LilvPlugin *pPlugin)
 {
     const LilvNode *pluginUri = lilv_plugin_get_uri(pPlugin);
 
@@ -664,7 +700,7 @@ Lv2PluginInfo::~Lv2PluginInfo()
 {
 }
 
-bool Lv2PortInfo::is_a(Lv2Host *lv2Plugins, const char *classUri)
+bool Lv2PortInfo::is_a(PiPedalHost *lv2Plugins, const char *classUri)
 {
     return classes_.is_a(lv2Plugins, classUri);
 }
@@ -686,7 +722,7 @@ static bool scale_points_sort_compare(const Lv2ScalePoint &v1, const Lv2ScalePoi
 {
     return v1.value() < v2.value();
 }
-Lv2PortInfo::Lv2PortInfo(Lv2Host *host, const LilvPlugin *plugin, const LilvPort *pPort)
+Lv2PortInfo::Lv2PortInfo(PiPedalHost *host, const LilvPlugin *plugin, const LilvPort *pPort)
 {
     auto pWorld = host->pWorld;
     index_ = lilv_port_get_index(plugin, pPort);
@@ -785,7 +821,7 @@ Lv2PortInfo::Lv2PortInfo(Lv2Host *host, const LilvPlugin *plugin, const LilvPort
     NodeAutoFree unitsValueUri = lilv_port_get(plugin, pPort, host->lilvUris.unitsUri);
     this->units_ = UriToUnits(nodeAsString(unitsValueUri));
 
-    NodeAutoFree commentNode = lilv_port_get(plugin,pPort,host->lilvUris.rdfsComment);
+    NodeAutoFree commentNode = lilv_port_get(plugin, pPort, host->lilvUris.rdfsComment);
     this->comment_ = nodeAsString(commentNode);
 
     NodeAutoFree bufferType = lilv_port_get(plugin, pPort, host->lilvUris.bufferType_uri);
@@ -800,7 +836,7 @@ Lv2PortInfo::Lv2PortInfo(Lv2Host *host, const LilvPlugin *plugin, const LilvPort
                 ((is_input_ || is_output_) && (is_audio_port_ || is_atom_port_ || is_cv_port_));
 }
 
-Lv2PluginClasses Lv2Host::GetPluginPortClass(const LilvPlugin *lilvPlugin, const LilvPort *lilvPort)
+Lv2PluginClasses PiPedalHost::GetPluginPortClass(const LilvPlugin *lilvPlugin, const LilvPort *lilvPort)
 {
     std::vector<std::string> result;
     const LilvNodes *nodes = lilv_port_get_classes(lilvPlugin, lilvPort);
@@ -832,7 +868,7 @@ bool Lv2PluginClass::is_a(const std::string &classUri) const
     }
     return false;
 }
-bool Lv2PluginClasses::is_a(Lv2Host *lv2Plugins, const char *classUri) const
+bool Lv2PluginClasses::is_a(PiPedalHost *lv2Plugins, const char *classUri) const
 {
     std::string classUri_(classUri);
     for (auto i : classes_)
@@ -845,7 +881,7 @@ bool Lv2PluginClasses::is_a(Lv2Host *lv2Plugins, const char *classUri) const
     return false;
 }
 
-bool Lv2Host::is_a(const std::string &class_, const std::string &target_class)
+bool PiPedalHost::is_a(const std::string &class_, const std::string &target_class)
 {
     if (class_ == target_class)
         return true;
@@ -857,7 +893,7 @@ bool Lv2Host::is_a(const std::string &class_, const std::string &target_class)
     return false;
 }
 
-Lv2PluginUiInfo::Lv2PluginUiInfo(Lv2Host *pHost, const Lv2PluginInfo *plugin)
+Lv2PluginUiInfo::Lv2PluginUiInfo(PiPedalHost *pHost, const Lv2PluginInfo *plugin)
     : uri_(plugin->uri()),
       name_(plugin->name()),
       author_name_(plugin->author_name()),
@@ -919,12 +955,12 @@ Lv2PluginUiInfo::Lv2PluginUiInfo(Lv2Host *pHost, const Lv2PluginInfo *plugin)
     }
 }
 
-std::shared_ptr<Lv2PluginClass> Lv2Host::GetLv2PluginClass() const
+std::shared_ptr<Lv2PluginClass> PiPedalHost::GetLv2PluginClass() const
 {
     return this->GetPluginClass(LV2_PLUGIN);
 }
 
-std::shared_ptr<Lv2PluginInfo> Lv2Host::GetPluginInfo(const std::string &uri) const
+std::shared_ptr<Lv2PluginInfo> PiPedalHost::GetPluginInfo(const std::string &uri) const
 {
     for (auto i = this->plugins_.begin(); i != this->plugins_.end(); ++i)
     {
@@ -936,7 +972,7 @@ std::shared_ptr<Lv2PluginInfo> Lv2Host::GetPluginInfo(const std::string &uri) co
     return nullptr;
 }
 
-Lv2PedalBoard *Lv2Host::CreateLv2PedalBoard(const PedalBoard &pedalBoard)
+Lv2PedalBoard *PiPedalHost::CreateLv2PedalBoard(PedalBoard &pedalBoard)
 {
     Lv2PedalBoard *pPedalBoard = new Lv2PedalBoard();
     try
@@ -953,18 +989,18 @@ Lv2PedalBoard *Lv2Host::CreateLv2PedalBoard(const PedalBoard &pedalBoard)
 
 struct StateCallbackData
 {
-    Lv2Host *pHost;
+    PiPedalHost *pHost;
     std::vector<ControlValue> *pResult;
 };
 
-void Lv2Host::fn_LilvSetPortValueFunc(const char *port_symbol,
+void PiPedalHost::fn_LilvSetPortValueFunc(const char *port_symbol,
-                                      void *user_data,
+                                          void *user_data,
-                                      const void *value,
+                                          const void *value,
-                                      uint32_t size,
+                                          uint32_t size,
-                                      uint32_t type)
+                                          uint32_t type)
 {
     StateCallbackData *pData = (StateCallbackData *)user_data;
-    Lv2Host *pHost = pData->pHost;
+    PiPedalHost *pHost = pData->pHost;
     std::vector<ControlValue> *pResult = pData->pResult;
     LV2_URID valueType = (LV2_URID)type;
     if (valueType != pHost->urids->atom_Float)
@@ -974,7 +1010,7 @@ void Lv2Host::fn_LilvSetPortValueFunc(const char *port_symbol,
     pResult->push_back(ControlValue(port_symbol, *(float *)value));
 }
 
-std::vector<ControlValue> Lv2Host::LoadFactoryPluginPreset(
+std::vector<ControlValue> PiPedalHost::LoadFactoryPluginPreset(
     PedalBoardItem *pedalBoardItem, const std::string &presetUri)
 {
 
@@ -1032,15 +1068,15 @@ std::vector<ControlValue> Lv2Host::LoadFactoryPluginPreset(
 
 struct PresetCallbackState
 {
-    Lv2Host *pHost;
+    PiPedalHost *pHost;
     std::map<std::string, float> *values;
     bool failed = false;
 };
 
-void Lv2Host::PortValueCallback(const char *symbol, void *user_data, const void *value, uint32_t size, uint32_t type)
+void PiPedalHost::PortValueCallback(const char *symbol, void *user_data, const void *value, uint32_t size, uint32_t type)
 {
     PresetCallbackState *pState = static_cast<PresetCallbackState *>(user_data);
-    Lv2Host *pHost = pState->pHost;
+    PiPedalHost *pHost = pState->pHost;
 
     if (type == pHost->urids->atom_Float)
     {
@@ -1051,7 +1087,7 @@ void Lv2Host::PortValueCallback(const char *symbol, void *user_data, const void
         pState->failed = true;
     }
 }
-PluginPresets Lv2Host::GetFactoryPluginPresets(const std::string &pluginUri)
+PluginPresets PiPedalHost::GetFactoryPluginPresets(const std::string &pluginUri)
 {
     const LilvPlugins *plugins = lilv_world_get_all_plugins(this->pWorld);
 
@@ -1093,17 +1129,38 @@ PluginPresets Lv2Host::GetFactoryPluginPresets(const std::string &pluginUri)
     return result;
 }
 
-Lv2Effect *Lv2Host::CreateEffect(const PedalBoardItem &pedalBoardItem)
+IEffect *PiPedalHost::CreateEffect(PedalBoardItem &pedalBoardItem)
 {
+    if (pedalBoardItem.uri().starts_with("vst3:"))
+    {
+    #if ENABLE_VST3
+        try
+        {
+            Vst3Effect::Ptr vst3Plugin = this->vst3Host->CreatePlugin(pedalBoardItem, this);
+            return vst3Plugin.release();
+        }
+        catch (const std::exception &e)
+        {
+            Lv2Log::error(std::string("Failed to create VST3 plugin: ") + e.what());
+            throw;
+        }
+    #else
+        Lv2Log::error(std::string("VST3 support not enabled at compile time."));
+        throw PiPedalException("VST3 support not enabled at compile time, SEE ENABLE_VST3 in CMakeList.txt.");
 
-    auto info = this->GetPluginInfo(pedalBoardItem.uri());
+    #endif
-    if (!info)
+    }
-        return nullptr;
+    else
+    {
+        auto info = this->GetPluginInfo(pedalBoardItem.uri());
+        if (!info)
+            return nullptr;
 
-    return new Lv2Effect(this, info, pedalBoardItem);
+        return new Lv2Effect(this, info, pedalBoardItem);
+    }
 }
 
-Lv2PortGroup::Lv2PortGroup(Lv2Host *lv2Host, const std::string &groupUri)
+Lv2PortGroup::Lv2PortGroup(PiPedalHost *lv2Host, const std::string &groupUri)
 {
     LilvWorld *pWorld = lv2Host->pWorld;
 
@@ -1131,47 +1188,45 @@ json_map::storage_type<Lv2ScalePoint> Lv2ScalePoint::jmap{{
     json_map::reference("label", &Lv2ScalePoint::label_),
 }};
 
-json_map::storage_type<Lv2PortInfo> Lv2PortInfo::jmap{{
+json_map::storage_type<Lv2PortInfo> Lv2PortInfo::jmap{{json_map::reference("index", &Lv2PortInfo::index_),
-    json_map::reference("index", &Lv2PortInfo::index_),
+                                                       json_map::reference("symbol", &Lv2PortInfo::symbol_),
-    json_map::reference("symbol", &Lv2PortInfo::symbol_),
+                                                       json_map::reference("index", &Lv2PortInfo::index_),
-    json_map::reference("index", &Lv2PortInfo::index_),
+                                                       json_map::reference("name", &Lv2PortInfo::name_),
-    json_map::reference("name", &Lv2PortInfo::name_),
 
-    json_map::reference("min_value", &Lv2PortInfo::min_value_),
+                                                       json_map::reference("min_value", &Lv2PortInfo::min_value_),
-    json_map::reference("max_value", &Lv2PortInfo::max_value_),
+                                                       json_map::reference("max_value", &Lv2PortInfo::max_value_),
-    json_map::reference("default_value", &Lv2PortInfo::default_value_),
+                                                       json_map::reference("default_value", &Lv2PortInfo::default_value_),
-    json_map::reference("classes", &Lv2PortInfo::classes_),
+                                                       json_map::reference("classes", &Lv2PortInfo::classes_),
 
-    json_map::reference("scale_points", &Lv2PortInfo::scale_points_),
+                                                       json_map::reference("scale_points", &Lv2PortInfo::scale_points_),
 
-    json_map::reference("is_input", &Lv2PortInfo::is_input_),
+                                                       json_map::reference("is_input", &Lv2PortInfo::is_input_),
-    json_map::reference("is_output", &Lv2PortInfo::is_output_),
+                                                       json_map::reference("is_output", &Lv2PortInfo::is_output_),
 
-    json_map::reference("is_control_port", &Lv2PortInfo::is_control_port_),
+                                                       json_map::reference("is_control_port", &Lv2PortInfo::is_control_port_),
-    json_map::reference("is_audio_port", &Lv2PortInfo::is_audio_port_),
+                                                       json_map::reference("is_audio_port", &Lv2PortInfo::is_audio_port_),
-    json_map::reference("is_atom_port", &Lv2PortInfo::is_audio_port_),
+                                                       json_map::reference("is_atom_port", &Lv2PortInfo::is_audio_port_),
-    json_map::reference("is_cv_port", &Lv2PortInfo::is_cv_port_),
+                                                       json_map::reference("is_cv_port", &Lv2PortInfo::is_cv_port_),
 
-    json_map::reference("is_valid", &Lv2PortInfo::is_valid_),
+                                                       json_map::reference("is_valid", &Lv2PortInfo::is_valid_),
 
-    json_map::reference("supports_midi", &Lv2PortInfo::supports_midi_),
+                                                       json_map::reference("supports_midi", &Lv2PortInfo::supports_midi_),
-    json_map::reference("supports_time_position", &Lv2PortInfo::supports_time_position_),
+                                                       json_map::reference("supports_time_position", &Lv2PortInfo::supports_time_position_),
-    json_map::reference("port_group", &Lv2PortInfo::port_group_),
+                                                       json_map::reference("port_group", &Lv2PortInfo::port_group_),
-    json_map::reference("is_logarithmic", &Lv2PortInfo::is_logarithmic_),
+                                                       json_map::reference("is_logarithmic", &Lv2PortInfo::is_logarithmic_),
 
-    MAP_REF(Lv2PortInfo, is_logarithmic),
+                                                       MAP_REF(Lv2PortInfo, is_logarithmic),
-    MAP_REF(Lv2PortInfo, display_priority),
+                                                       MAP_REF(Lv2PortInfo, display_priority),
-    MAP_REF(Lv2PortInfo, range_steps),
+                                                       MAP_REF(Lv2PortInfo, range_steps),
-    MAP_REF(Lv2PortInfo, trigger),
+                                                       MAP_REF(Lv2PortInfo, trigger),
-    MAP_REF(Lv2PortInfo, integer_property),
+                                                       MAP_REF(Lv2PortInfo, integer_property),
-    MAP_REF(Lv2PortInfo, enumeration_property),
+                                                       MAP_REF(Lv2PortInfo, enumeration_property),
-    MAP_REF(Lv2PortInfo, toggled_property),
+                                                       MAP_REF(Lv2PortInfo, toggled_property),
-    MAP_REF(Lv2PortInfo, not_on_gui),
+                                                       MAP_REF(Lv2PortInfo, not_on_gui),
-    MAP_REF(Lv2PortInfo, buffer_type),
+                                                       MAP_REF(Lv2PortInfo, buffer_type),
-    MAP_REF(Lv2PortInfo, port_group),
+                                                       MAP_REF(Lv2PortInfo, port_group),
-    json_map::enum_reference("units", &Lv2PortInfo::units_, get_units_enum_converter()),
+                                                       json_map::enum_reference("units", &Lv2PortInfo::units_, get_units_enum_converter()),
-    MAP_REF(Lv2PortInfo, comment)
+                                                       MAP_REF(Lv2PortInfo, comment)}};
-}};
 
 json_map::storage_type<Lv2PortGroup> Lv2PortGroup::jmap{{
     MAP_REF(Lv2PortGroup, uri),
@@ -1197,21 +1252,19 @@ json_map::storage_type<Lv2PluginInfo> Lv2PluginInfo::jmap{{
     json_map::reference("has_factory_presets", &Lv2PluginInfo::has_factory_presets_),
 }};
 
-json_map::storage_type<Lv2PluginUiInfo> Lv2PluginUiInfo::jmap{{
+json_map::storage_type<Lv2PluginClass> Lv2PluginClass::jmap{{
-    json_map::reference("uri", &Lv2PluginUiInfo::uri_),
+    MAP_REF(Lv2PluginClass, uri),
-    json_map::reference("name", &Lv2PluginUiInfo::name_),
+    MAP_REF(Lv2PluginClass, display_name),
-    json_map::enum_reference("plugin_type", &Lv2PluginUiInfo::plugin_type_, get_plugin_type_enum_converter()),
+    MAP_REF(Lv2PluginClass, parent_uri),
-    json_map::reference("plugin_display_type", &Lv2PluginUiInfo::plugin_display_type_),
+    json_map::enum_reference("plugin_type", &Lv2PluginClass::plugin_type_, get_plugin_type_enum_converter()),
-    json_map::reference("author_name", &Lv2PluginUiInfo::author_name_),
+    MAP_REF(Lv2PluginClass, children),
-    json_map::reference("author_homepage", &Lv2PluginUiInfo::author_homepage_),
+}};
-    json_map::reference("audio_inputs", &Lv2PluginUiInfo::audio_inputs_),
-    json_map::reference("audio_outputs", &Lv2PluginUiInfo::audio_outputs_),
-    json_map::reference("description", &Lv2PluginUiInfo::description_),
-    json_map::reference("has_midi_input", &Lv2PluginUiInfo::has_midi_input_),
-    json_map::reference("has_midi_output", &Lv2PluginUiInfo::has_midi_output_),
-    json_map::reference("controls", &Lv2PluginUiInfo::controls_),
-    json_map::reference("port_groups", &Lv2PluginUiInfo::port_groups_),
 
+json_map::storage_type<Lv2PluginUiPortGroup> Lv2PluginUiPortGroup::jmap{{
+    MAP_REF(Lv2PluginUiPortGroup, symbol),
+    MAP_REF(Lv2PluginUiPortGroup, name),
+    MAP_REF(Lv2PluginUiPortGroup, parent_group),
+    MAP_REF(Lv2PluginUiPortGroup, program_list_id),
 }};
 
 json_map::storage_type<Lv2PluginUiControlPort> Lv2PluginUiControlPort::jmap{{
@@ -1234,18 +1287,26 @@ json_map::storage_type<Lv2PluginUiControlPort> Lv2PluginUiControlPort::jmap{{
 
     json_map::enum_reference("units", &Lv2PluginUiControlPort::units_, get_units_enum_converter()),
     MAP_REF(Lv2PluginUiControlPort, comment),
+    MAP_REF(Lv2PluginUiControlPort, is_bypass),
+    MAP_REF(Lv2PluginUiControlPort, is_program_controller),
+    MAP_REF(Lv2PluginUiControlPort, custom_units),
 
 }};
 
-json_map::storage_type<Lv2PluginClass> Lv2PluginClass::jmap{{
+json_map::storage_type<Lv2PluginUiInfo> Lv2PluginUiInfo::jmap{{
-    MAP_REF(Lv2PluginClass, uri),
+    json_map::reference("uri", &Lv2PluginUiInfo::uri_),
-    MAP_REF(Lv2PluginClass, display_name),
+    json_map::reference("name", &Lv2PluginUiInfo::name_),
-    MAP_REF(Lv2PluginClass, parent_uri),
+    json_map::enum_reference("plugin_type", &Lv2PluginUiInfo::plugin_type_, get_plugin_type_enum_converter()),
-    json_map::enum_reference("plugin_type", &Lv2PluginClass::plugin_type_, get_plugin_type_enum_converter()),
+    json_map::reference("plugin_display_type", &Lv2PluginUiInfo::plugin_display_type_),
-    MAP_REF(Lv2PluginClass, children),
+    json_map::reference("author_name", &Lv2PluginUiInfo::author_name_),
-}};
+    json_map::reference("author_homepage", &Lv2PluginUiInfo::author_homepage_),
+    json_map::reference("audio_inputs", &Lv2PluginUiInfo::audio_inputs_),
+    json_map::reference("audio_outputs", &Lv2PluginUiInfo::audio_outputs_),
+    json_map::reference("description", &Lv2PluginUiInfo::description_),
+    json_map::reference("has_midi_input", &Lv2PluginUiInfo::has_midi_input_),
+    json_map::reference("has_midi_output", &Lv2PluginUiInfo::has_midi_output_),
+    json_map::reference("controls", &Lv2PluginUiInfo::controls_),
+    json_map::reference("port_groups", &Lv2PluginUiInfo::port_groups_),
+    json_map::reference("is_vst3", &Lv2PluginUiInfo::is_vst3_),
 
-json_map::storage_type<Lv2PluginUiPortGroup> Lv2PluginUiPortGroup::jmap{{
-    MAP_REF(Lv2PluginUiPortGroup, symbol),
-    MAP_REF(Lv2PluginUiPortGroup, name),
 }};

src/PiPedalHost.hpp

@@ -30,11 +30,15 @@
 #include "OptionsFeature.hpp"
 #include <filesystem>
 #include <cmath>
+#include <string>
 
 #include "lv2.h"
 #include "Units.hpp"
 #include "PluginPreset.hpp"
 
+#include "IEffect.hpp"
+#include "PiPedalConfiguration.hpp"
+
 
 namespace pipedal {
 
@@ -42,19 +46,23 @@ namespace pipedal {
 // forward declarations
 class Lv2Effect;
 class Lv2PedalBoard;
-class Lv2Host;
+class PiPedalHost;
 class JackConfiguration;
 class JackChannelSelection;
 
+#ifndef LV2_PROPERTY_GETSET
 #define LV2_PROPERTY_GETSET(name) \
     const decltype(name##_) & name() const { return name##_; }; \
     decltype(name##_) & name()  { return name##_; }; \
     void  name(const decltype(name##_) &value) { name##_ = value; }; 
+#endif
 
 
+#ifndef LV2_PROPERTY_GETSET_SCALAR
 #define LV2_PROPERTY_GETSET_SCALAR(name) \
     decltype(name##_) name() const { return name##_;}; \
     void  name(decltype(name##_) value) { name##_ = value; }; 
+#endif
 
 
 
@@ -62,7 +70,7 @@ class JackChannelSelection;
 
 class Lv2PluginClass {
 public:
-    friend class Lv2Host;
+    friend class PiPedalHost;
 private:
     Lv2PluginClass*  parent_ = nullptr; // NOT SERIALIZED!
     std::string parent_uri_;
@@ -72,7 +80,7 @@ private:
     std::vector<std::shared_ptr<Lv2PluginClass>> children_;
 
 
-    friend class ::pipedal::Lv2Host;
+    friend class ::pipedal::PiPedalHost;
     // hide copy constructor.
     Lv2PluginClass(const Lv2PluginClass &other)
     {
@@ -135,7 +143,7 @@ public:
     {
         return classes_;
     }
-    bool is_a(Lv2Host*lv2Plugins,const char*classUri) const;
+    bool is_a(PiPedalHost*lv2Plugins,const char*classUri) const;
 
     static json_map::storage_type<Lv2PluginClasses> jmap;
 
@@ -171,7 +179,7 @@ enum class Lv2BufferType {
 
 class Lv2PortInfo {
 public:
-    Lv2PortInfo(Lv2Host*lv2Host,const LilvPlugin*pPlugin,const LilvPort *pPort);
+    Lv2PortInfo(PiPedalHost*lv2Host,const LilvPlugin*pPlugin,const LilvPort *pPort);
 private:
     friend class Lv2PluginInfo;
 
@@ -276,7 +284,7 @@ public:
 public:
     Lv2PortInfo() { }
     ~Lv2PortInfo() = default;
-    bool is_a(Lv2Host*lv2Plugins,const char*classUri);
+    bool is_a(PiPedalHost*lv2Plugins,const char*classUri);
 
     static json_map::storage_type<Lv2PortInfo> jmap;
     
@@ -294,19 +302,19 @@ public:
     LV2_PROPERTY_GETSET(name);
 
     Lv2PortGroup() { }
-    Lv2PortGroup(Lv2Host*lv2Host,const std::string &groupUri);
+    Lv2PortGroup(PiPedalHost*lv2Host,const std::string &groupUri);
 
     static json_map::storage_type<Lv2PortGroup> jmap;
 };
 
 class Lv2PluginInfo {
 private:
-    friend class Lv2Host;
+    friend class PiPedalHost;
 public:
-    Lv2PluginInfo(Lv2Host*lv2Host,const LilvPlugin*);
+    Lv2PluginInfo(PiPedalHost*lv2Host,const LilvPlugin*);
     Lv2PluginInfo() { }
 private:
-    bool HasFactoryPresets(Lv2Host*lv2Host, const LilvPlugin*plugin);
+    bool HasFactoryPresets(PiPedalHost*lv2Host, const LilvPlugin*plugin);
     std::string uri_;
     std::string name_;
     std::string plugin_class_;
@@ -399,139 +407,151 @@ public:
 
 };
 
-
+    class Lv2PluginUiPortGroup
-class Lv2PluginUiControlPort {
-public:
-    Lv2PluginUiControlPort() {
-    }
-    Lv2PluginUiControlPort(const Lv2PluginInfo *pPlugin,const Lv2PortInfo*pPort)
-    : symbol_(pPort->symbol())
-    , index_(pPort->index())
-    , name_(pPort->name())
-    , min_value_(pPort->min_value())
-    , max_value_(pPort->max_value())
-    , default_value_(pPort->default_value())
-    , range_steps_(pPort->range_steps())
-    , display_priority_(pPort->display_priority())
-    , is_logarithmic_(pPort->is_logarithmic())
-    , integer_property_(pPort->integer_property())
-    , enumeration_property_(pPort->enumeration_property())
-    , toggled_property_(pPort->toggled_property())
-    , not_on_gui_(pPort->not_on_gui())
-    , scale_points_(pPort->scale_points())
-    , comment_(pPort->comment())
-    , units_(pPort->units())
     {
-        // Use symbols to index port groups, instead of uris.
+    private:
-        // symbols are guaranteed to be unique.
+        std::string symbol_;
-        auto &portGroup = pPort->port_group();
+        std::string name_;
-        for (int i = 0; i < pPlugin->port_groups().size(); ++i)
+
+        std::string parent_group_;
+        int32_t program_list_id_ = -1; // used by VST3.
+    public:
+        LV2_PROPERTY_GETSET(symbol)
+        LV2_PROPERTY_GETSET(name)
+        LV2_PROPERTY_GETSET(parent_group)
+        LV2_PROPERTY_GETSET_SCALAR(program_list_id)
+
+    public:
+        Lv2PluginUiPortGroup() {}
+        Lv2PluginUiPortGroup(Lv2PortGroup *pPortGroup)
+            : symbol_(pPortGroup->symbol()), name_(pPortGroup->name())
+        {
+        }
+        Lv2PluginUiPortGroup(
+            const std::string &symbol, const std::string &name,
+            const std::string &parent_group, int32_t programListId)
+        : symbol_(symbol),name_(name),parent_group_(parent_group),program_list_id_(programListId)
         {
 
-            auto &p = pPlugin->port_groups()[i];
+        }
-            if (p->uri() == portGroup)
-            {
-                this->port_group_ = p->symbol();
-                break;
-            }
-            
 
-        }   
+    public:
-    }
+        static json_map::storage_type<Lv2PluginUiPortGroup> jmap;
-private:
+    };
-    std::string symbol_;
-    int index_;
-    std::string name_;
-    float min_value_ = 0, max_value_ = 1,default_value_ = 0;
-    int range_steps_ = 0;
-    int display_priority_ = -1;
-    bool is_logarithmic_ = false;
-    bool integer_property_ = false;
-    bool enumeration_property_ = false;
-    bool toggled_property_ = false;
-    bool not_on_gui_ = false;
-    std::vector<Lv2ScalePoint> scale_points_;
-    std::string port_group_;
-    Units units_ = Units::none;
-    std::string comment_;
-public:
-    LV2_PROPERTY_GETSET(symbol);
-    LV2_PROPERTY_GETSET_SCALAR(index);
-    LV2_PROPERTY_GETSET(name);
-    LV2_PROPERTY_GETSET_SCALAR(min_value);
-    LV2_PROPERTY_GETSET_SCALAR(max_value);
-    LV2_PROPERTY_GETSET_SCALAR(default_value);
-    LV2_PROPERTY_GETSET_SCALAR(range_steps);
-    LV2_PROPERTY_GETSET_SCALAR(display_priority);
-    LV2_PROPERTY_GETSET_SCALAR(is_logarithmic);
-    LV2_PROPERTY_GETSET_SCALAR(integer_property);
-    LV2_PROPERTY_GETSET_SCALAR(enumeration_property);
-    LV2_PROPERTY_GETSET_SCALAR(toggled_property);
-    LV2_PROPERTY_GETSET_SCALAR(not_on_gui);
-    LV2_PROPERTY_GETSET(scale_points);
-    LV2_PROPERTY_GETSET(units);
-    LV2_PROPERTY_GETSET(comment);
 
-public:
+    class Lv2PluginUiControlPort
-    static json_map::storage_type<Lv2PluginUiControlPort> jmap;
-
-};
-
-class Lv2PluginUiPortGroup {
-private:
-    std::string symbol_;
-    std::string name_;
-public:
-    Lv2PluginUiPortGroup() { }
-    Lv2PluginUiPortGroup(Lv2PortGroup *pPortGroup)
-    : symbol_(pPortGroup->symbol())
-    , name_(pPortGroup->name())
     {
-    }
+    public:
-public:
+        Lv2PluginUiControlPort()
-    static json_map::storage_type<Lv2PluginUiPortGroup> jmap;
+        {
+        }
+        Lv2PluginUiControlPort(const Lv2PluginInfo *pPlugin, const Lv2PortInfo *pPort)
+            : symbol_(pPort->symbol()), index_(pPort->index()), name_(pPort->name()), min_value_(pPort->min_value()), max_value_(pPort->max_value()), default_value_(pPort->default_value()), range_steps_(pPort->range_steps()), display_priority_(pPort->display_priority()), is_logarithmic_(pPort->is_logarithmic()), integer_property_(pPort->integer_property()), enumeration_property_(pPort->enumeration_property()), toggled_property_(pPort->toggled_property()), not_on_gui_(pPort->not_on_gui()), scale_points_(pPort->scale_points()), comment_(pPort->comment()), units_(pPort->units())
+        {
+            // Use symbols to index port groups, instead of uris.
+            // symbols are guaranteed to be unique.
+            auto &portGroup = pPort->port_group();
+            for (int i = 0; i < pPlugin->port_groups().size(); ++i)
+            {
 
-};
+                auto &p = pPlugin->port_groups()[i];
+                if (p->uri() == portGroup)
+                {
+                    this->port_group_ = p->symbol();
+                    break;
+                }
+            }
+        }
 
-class Lv2PluginUiInfo {
+    private:
-public:
+        std::string symbol_;
-    Lv2PluginUiInfo() { }
+        int index_;
-    Lv2PluginUiInfo(Lv2Host *pPlugins,const Lv2PluginInfo *plugin);
+        std::string name_;
+        float min_value_ = 0, max_value_ = 1, default_value_ = 0;
+        int range_steps_ = 0;
+        int display_priority_ = -1;
+        bool is_logarithmic_ = false;
+        bool integer_property_ = false;
+        bool enumeration_property_ = false;
+        bool toggled_property_ = false;
+        bool not_on_gui_ = false;
+        std::vector<Lv2ScalePoint> scale_points_;
+        std::string port_group_;
+        Units units_ = Units::none;
+        std::string comment_;
+        bool is_bypass_ = false;
+        bool is_program_controller_ = false;
+        std::string custom_units_;
 
-private:
+    public:
-    std::string uri_;
+        LV2_PROPERTY_GETSET(symbol);
-    std::string name_;
+        LV2_PROPERTY_GETSET_SCALAR(index);
-    std::string author_name_;
+        LV2_PROPERTY_GETSET(name);
-    std::string author_homepage_;
+        LV2_PROPERTY_GETSET(port_group);
-    PluginType plugin_type_;
+        LV2_PROPERTY_GETSET_SCALAR(min_value);
-    std::string plugin_display_type_;
+        LV2_PROPERTY_GETSET_SCALAR(max_value);
-    int audio_inputs_ = 0;
+        LV2_PROPERTY_GETSET_SCALAR(default_value);
-    int audio_outputs_ = 0;
+        LV2_PROPERTY_GETSET_SCALAR(range_steps);
-    int has_midi_input_ = false;
+        LV2_PROPERTY_GETSET_SCALAR(display_priority);
-    int has_midi_output_ = false;
+        LV2_PROPERTY_GETSET_SCALAR(is_logarithmic);
-    std::string description_;
+        LV2_PROPERTY_GETSET_SCALAR(integer_property);
+        LV2_PROPERTY_GETSET_SCALAR(enumeration_property);
+        LV2_PROPERTY_GETSET_SCALAR(toggled_property);
+        LV2_PROPERTY_GETSET_SCALAR(not_on_gui);
+        LV2_PROPERTY_GETSET(scale_points);
+        LV2_PROPERTY_GETSET(units);
+        LV2_PROPERTY_GETSET(comment);
+        LV2_PROPERTY_GETSET_SCALAR(is_bypass);
+        LV2_PROPERTY_GETSET_SCALAR(is_program_controller);
+        LV2_PROPERTY_GETSET(custom_units);
 
-    std::vector<Lv2PluginUiControlPort> controls_;
+    public:
-    std::vector<Lv2PluginUiPortGroup> port_groups_;
+        static json_map::storage_type<Lv2PluginUiControlPort> jmap;
+    };
 
-public:
+    class Lv2PluginUiInfo
-    LV2_PROPERTY_GETSET(uri)
+    {
-    LV2_PROPERTY_GETSET(name)
+    public:
-    LV2_PROPERTY_GETSET(author_name)
+        Lv2PluginUiInfo() {}
-    LV2_PROPERTY_GETSET(author_homepage)
+        Lv2PluginUiInfo(PiPedalHost *pPlugins, const Lv2PluginInfo *plugin);
-    LV2_PROPERTY_GETSET_SCALAR(plugin_type)
+
-    LV2_PROPERTY_GETSET(plugin_display_type)
+    private:
-    LV2_PROPERTY_GETSET_SCALAR(audio_inputs)
+        std::string uri_;
-    LV2_PROPERTY_GETSET_SCALAR(audio_outputs)
+        std::string name_;
-    LV2_PROPERTY_GETSET_SCALAR(has_midi_input)
+        std::string author_name_;
-    LV2_PROPERTY_GETSET_SCALAR(has_midi_output)
+        std::string author_homepage_;
-    LV2_PROPERTY_GETSET_SCALAR(description)
+        PluginType plugin_type_;
-    LV2_PROPERTY_GETSET(port_groups)
+        std::string plugin_display_type_;
+        int audio_inputs_ = 0;
+        int audio_outputs_ = 0;
+        int has_midi_input_ = false;
+        int has_midi_output_ = false;
+        std::string description_;
+        bool is_vst3_ = false;
+
+        std::vector<Lv2PluginUiControlPort> controls_;
+        std::vector<Lv2PluginUiPortGroup> port_groups_;
+
+    public:
+        LV2_PROPERTY_GETSET(uri)
+        LV2_PROPERTY_GETSET(name)
+        LV2_PROPERTY_GETSET(author_name)
+        LV2_PROPERTY_GETSET(author_homepage)
+        LV2_PROPERTY_GETSET_SCALAR(plugin_type)
+        LV2_PROPERTY_GETSET(plugin_display_type)
+        LV2_PROPERTY_GETSET_SCALAR(audio_inputs)
+        LV2_PROPERTY_GETSET_SCALAR(audio_outputs)
+        LV2_PROPERTY_GETSET_SCALAR(has_midi_input)
+        LV2_PROPERTY_GETSET_SCALAR(has_midi_output)
+        LV2_PROPERTY_GETSET_SCALAR(description)
+        LV2_PROPERTY_GETSET(controls)
+        LV2_PROPERTY_GETSET(port_groups)
+        LV2_PROPERTY_GETSET_SCALAR(is_vst3)
+
+        static json_map::storage_type<Lv2PluginUiInfo> jmap;
+    };
 
 
-    static json_map::storage_type<Lv2PluginUiInfo> jmap;
-
-};
 
 class IHost {
 public:
@@ -552,7 +572,7 @@ public:
     virtual std::shared_ptr<Lv2PluginInfo> GetPluginInfo(const std::string&uri) const = 0;
 
 
-    virtual Lv2Effect*CreateEffect(const PedalBoardItem &pedalBoard) = 0;
+    virtual IEffect*CreateEffect(PedalBoardItem &pedalBoard) = 0;
 };
 
 
@@ -583,8 +603,24 @@ public:
     LilvNodePtr&operator=(LilvNode*node) { Free(); this->node = node; return *this;}
 };
 
-class Lv2Host: private IHost {
+}
+
+#if ENABLE_VST3
+#include "vst3/Vst3Host.hpp"
+#endif
+
+
+namespace pipedal{
+
+
+
+
+class PiPedalHost: private IHost {
 private:
+#if ENABLE_VST3
+    Vst3Host::Ptr vst3Host;
+
+#endif
     static const char *RDFS_COMMENT_URI;
     class LilvUris {
     public:
@@ -619,6 +655,8 @@ private:
 
 
     };
+    bool vst3Enabled = true;
+
     LilvUris lilvUris;
 
     LilvNode *get_comment(const std::string &uri);
@@ -631,6 +669,8 @@ private:
     int numberOfAudioOutputChannels = 2;
     double sampleRate = 0;
 
+    std::string vst3CachePath;
+
     LV2_Feature*const*lv2Features = nullptr;
     MapFeature mapFeature;
     LogFeature logFeature;
@@ -678,17 +718,20 @@ private:
     }
     static void PortValueCallback(const char*symbol,void*user_data,const void* value,uint32_t size, uint32_t type);
 
-    virtual Lv2Effect*CreateEffect(const PedalBoardItem &pedalBoardItem);
+    virtual IEffect*CreateEffect(PedalBoardItem &pedalBoardItem);
     void LoadPluginClassesFromLilv();
     void AddJsonClassesToMap(std::shared_ptr<Lv2PluginClass> pluginClass);
 
 public:
-    Lv2Host();
+    PiPedalHost();
-    virtual ~Lv2Host();
+
+    void SetConfiguration(const PiPedalConfiguration&configuration);
+
+    virtual ~PiPedalHost();
 
     IHost* asIHost() { return this;}
 
-    virtual Lv2PedalBoard * CreateLv2PedalBoard(const PedalBoard& pedalBoard);
+    virtual Lv2PedalBoard * CreateLv2PedalBoard(PedalBoard& pedalBoard);
 
     void setSampleRate(double sampleRate)
     {
@@ -719,7 +762,7 @@ public:
 
 
     void LoadPluginClassesFromJson(std::filesystem::path jsonFile);
-    void Load(const char*lv2Path = Lv2Host::DEFAULT_LV2_PATH);
+    void Load(const char*lv2Path = PiPedalHost::DEFAULT_LV2_PATH);
 
     virtual LV2_URID GetLv2Urid(const char*uri)  {
         return this->mapFeature.GetUrid(uri);
@@ -736,5 +779,5 @@ public:
 };
 
 #undef LV2_PROPERTY_GETSET
-
+#undef LV2_PROPERTY_GETSET_SCALAR
 } // namespace pipedal.

src/PiPedalModel.cpp

@@ -43,9 +43,18 @@ T &constMutex(const T &mutex)
     return const_cast<T &>(mutex);
 }
 
-std::string AtomToJson(int length, uint8_t *pData)
+static const char *hexChars = "0123456789ABCDEF";
+
+static std::string BytesToHex(const std::vector<uint8_t> &bytes)
 {
-    return "";
+    std::stringstream s;
+
+    for (size_t i = 0; i < bytes.size(); ++i)
+    {
+        uint8_t b = bytes[i];
+        s << hexChars[(b >> 4) & 0x0F] << hexChars[b & 0x0F];
+    }
+    return s.str();
 }
 
 PiPedalModel::PiPedalModel()
@@ -119,6 +128,7 @@ PiPedalModel::~PiPedalModel()
 void PiPedalModel::Init(const PiPedalConfiguration &configuration)
 {
     this->configuration = configuration;
+    lv2Host.SetConfiguration(configuration);
     storage.SetConfigRoot(configuration.GetDocRoot());
     storage.SetDataRoot(configuration.GetLocalStoragePath());
     storage.Initialize();
@@ -282,7 +292,17 @@ void PiPedalModel::RemoveNotificationSubsription(IPiPedalModelSubscriber *pSubsc
 void PiPedalModel::PreviewControl(int64_t clientId, int64_t pedalItemId, const std::string &symbol, float value)
 {
 
-    jackHost->SetControlValue(pedalItemId, symbol, value);
+    IEffect* effect = lv2PedalBoard->GetEffect(pedalItemId);
+    if (effect->IsVst3())
+    {
+        int index = lv2PedalBoard->GetControlIndex(pedalItemId, symbol);
+        if (index != -1)
+        {
+            effect->SetControl(index,value);;
+        }
+    } else {
+        jackHost->SetControlValue(pedalItemId, symbol, value);
+    }
 }
 
 void PiPedalModel::SetControl(int64_t clientId, int64_t pedalItemId, const std::string &symbol, float value)
@@ -291,6 +311,8 @@ void PiPedalModel::SetControl(int64_t clientId, int64_t pedalItemId, const std::
         std::lock_guard<std::recursive_mutex> guard(mutex);
         PreviewControl(clientId, pedalItemId, symbol, value);
         this->pedalBoard.SetControlValue(pedalItemId, symbol, value);
+        IEffect *pEffect = this->lv2PedalBoard->GetEffect(pedalItemId);
+
         {
 
             // take a snapshot incase a client unsusbscribes in the notification handler (in which case the mutex won't protect us)
@@ -300,9 +322,11 @@ void PiPedalModel::SetControl(int64_t clientId, int64_t pedalItemId, const std::
                 t[i] = this->subscribers[i];
             }
             size_t n = this->subscribers.size();
-            for (size_t i = 0; i < n; ++i)
             {
-                t[i]->OnControlChanged(clientId, pedalItemId, symbol, value);
+                for (size_t i = 0; i < n; ++i)
+                {
+                    t[i]->OnControlChanged(clientId, pedalItemId, symbol, value);
+                }
             }
             delete[] t;
 
@@ -379,6 +403,23 @@ void PiPedalModel::SetPedalBoard(int64_t clientId, PedalBoard &pedalBoard)
         this->SetPresetChanged(clientId, true);
     }
 }
+void PiPedalModel::UpdateCurrentPedalBoard(int64_t clientId, PedalBoard &pedalBoard)
+{
+    {
+        std::lock_guard<std::recursive_mutex> guard(mutex);
+
+        // update vst3 presets if neccessary.
+        // the pedalboard must be a manipualted instance of the current Lv2Pedalboard.
+
+        UpdateVst3Settings(pedalBoard);
+
+        this->pedalBoard = pedalBoard;
+        UpdateDefaults(&this->pedalBoard);
+
+        this->FirePedalBoardChanged(clientId);
+        this->SetPresetChanged(clientId, true);
+    }
+}
 
 void PiPedalModel::SetPedalBoardItemEnable(int64_t clientId, int64_t pedalItemId, bool enabled)
 {
@@ -475,10 +516,35 @@ void PiPedalModel::FirePluginPresetsChanged(const std::string &pluginUri)
     }
 }
 
+void PiPedalModel::UpdateVst3Settings(PedalBoard &pedalBoard)
+{
+    // get the vst3 state bundle from lv2Pedalboard for the current pedalBoard.
+#if ENABLE_VST3
+    PedalBoard pb;
+    for (IEffect *effect : lv2PedalBoard->GetEffects())
+    {
+        if (effect->IsVst3())
+        {
+            PedalBoardItem *item = pedalBoard.GetItem(effect->GetInstanceId());
+            if (item)
+            {
+                Vst3Effect *vst3Effect = (Vst3Effect *)effect;
+                std::vector<uint8_t> state;
+                if (vst3Effect->GetState(&state))
+                {
+                    item->vstState(BytesToHex(state));
+                }
+            }
+        }
+    }
+#endif
+}
+
 void PiPedalModel::SaveCurrentPreset(int64_t clientId)
 {
     std::lock_guard<std::recursive_mutex> guard{mutex};
 
+    UpdateVst3Settings(this->pedalBoard);
     storage.SaveCurrentPreset(this->pedalBoard);
     this->SetPresetChanged(clientId, false);
 }
@@ -517,6 +583,7 @@ int64_t PiPedalModel::SaveCurrentPresetAs(int64_t clientId, const std::string &n
     std::lock_guard<std::recursive_mutex> guard{mutex};
 
     auto pedalboard = this->pedalBoard;
+    UpdateVst3Settings(pedalBoard);
     pedalboard.name(name);
     int64_t result = storage.SaveCurrentPresetAs(pedalboard, name, saveAfterInstanceId);
     FirePresetsChanged(clientId);
@@ -697,14 +764,13 @@ void PiPedalModel::SetWifiConfigSettings(const WifiConfigSettings &wifiConfigSet
     }
 }
 
-
 static std::string GetP2pdName()
 {
     std::string name = "/etc/pipedal/config/pipedal_p2pd.conf";
 
     std::string result;
 
-    if (ConfigUtil::GetConfigLine(name,"p2p_device_name",&result))
+    if (ConfigUtil::GetConfigLine(name, "p2p_device_name", &result))
     {
         return result;
     }
@@ -718,17 +784,15 @@ void PiPedalModel::UpdateDnsSd()
     ServiceConfiguration deviceIdFile;
     deviceIdFile.Load();
 
-
     std::string p2pdName = GetP2pdName();
-    if (p2pdName != "") {
+    if (p2pdName != "")
+    {
         deviceIdFile.deviceName = p2pdName;
     }
 
     if (deviceIdFile.deviceName != "" && deviceIdFile.uuid != "")
     {
         avahiService.Announce(webPort, deviceIdFile.deviceName, deviceIdFile.uuid, "pipedal");
-
-
     }
     else
     {
@@ -820,16 +884,16 @@ void PiPedalModel::RestartAudio()
 
         this->jackHost->Close();
     }
-        // restarting is a bit dodgy. It was impossible with Jack, but
+    // restarting is a bit dodgy. It was impossible with Jack, but
-        // now very plausible with the ALSA audio stack.
+    // now very plausible with the ALSA audio stack.
 
-        // Still bugs wrt/ restarting the circular buffers for the audio thread.
+    // Still bugs wrt/ restarting the circular buffers for the audio thread.
 
-        // for the meantime, just rely on the fact that the admin service will restart
+    // for the meantime, just rely on the fact that the admin service will restart
-        // the process.
+    // the process.
-        //...
+    //...
 
-        // do a complete reload.
+    // do a complete reload.
 
     this->jackHost->SetPedalBoard(nullptr);
 
@@ -839,14 +903,14 @@ void PiPedalModel::RestartAudio()
     {
         JackChannelSelection selection = storage.GetJackChannelSelection(jackConfiguration);
         selection = selection.RemoveInvalidChannels(jackConfiguration);
-
+    }
-    } else {
+    else
+    {
         jackConfiguration.SetErrorStatus("Error");
     }
 
     FireJackConfigurationChanged(jackConfiguration);
 
-
     if (!jackServerSettings.IsValid() || !jackConfiguration.isValid())
     {
         Lv2Log::error("Audio configuration not valid.");
@@ -1223,12 +1287,11 @@ void PiPedalModel::SetJackServerSettings(const JackServerSettings &jackServerSet
     }
     delete[] t;
 
-
 #if ALSA_HOST
     storage.SetJackServerSettings(jackServerSettings);
 
     FireJackConfigurationChanged(this->jackConfiguration);
-    
+
     guard.unlock();
     RestartAudio();
 
@@ -1280,7 +1343,6 @@ void PiPedalModel::SetJackServerSettings(const JackServerSettings &jackServerSet
 #endif
                 }
             });
-
     }
 #endif
 }

src/PiPedalModel.hpp

@@ -19,7 +19,7 @@
 
 #pragma once
 #include <mutex>
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 #include "GovernorSettings.hpp"
 #include "PedalBoard.hpp"
 #include "Storage.hpp"
@@ -52,6 +52,7 @@ public:
     virtual int64_t GetClientId() = 0;
     virtual void OnItemEnabledChanged(int64_t clientId, int64_t pedalItemId, bool enabled) = 0;
     virtual void OnControlChanged(int64_t clientId, int64_t pedalItemId, const std::string &symbol, float value) = 0;
+    virtual void OnVst3ControlChanged(int64_t clientId, int64_t pedalItemId, const std::string &symbol, float value, const std::string&state) = 0;
     virtual void OnPedalBoardChanged(int64_t clientId, const PedalBoard &pedalBoard) = 0;
     virtual void OnPresetsChanged(int64_t clientId, const PresetIndex&presets) = 0;
     virtual void OnPluginPresetsChanged(const std::string&pluginUri) = 0;
@@ -104,7 +105,7 @@ private:
     std::vector<AtomOutputListener> atomOutputListeners;
 
     JackServerSettings jackServerSettings;
-    Lv2Host lv2Host;
+    PiPedalHost lv2Host;
     PedalBoard pedalBoard;
     Storage storage;
     bool hasPresetChanged = false;
@@ -155,6 +156,7 @@ private: // IJackHostCallbacks
     virtual void OnNotifyMidiListen(bool isNote, uint8_t noteOrControl);
     virtual void OnNotifyAtomOutput(uint64_t instanceId, const std::string&atomType,const std::string&atomJson);
 
+    void UpdateVst3Settings(PedalBoard&pedalBoard);
 
     PiPedalConfiguration configuration;
 public:
@@ -173,7 +175,7 @@ public:
     void LoadLv2PluginInfo();
     void Load();
 
-    const Lv2Host& GetLv2Host() const { return lv2Host; }
+    const PiPedalHost& GetLv2Host() const { return lv2Host; }
     PedalBoard  GetCurrentPedalBoardCopy() 
     { 
         std::lock_guard<std::recursive_mutex> guard(mutex);
@@ -191,6 +193,8 @@ public:
     void SetControl(int64_t clientId,int64_t pedalItemId, const std::string&symbol,float value);
     void PreviewControl(int64_t clientId,int64_t pedalItemId, const std::string&symbol,float value);
     void SetPedalBoard(int64_t clientId,PedalBoard &pedalBoard);
+    void UpdateCurrentPedalBoard(int64_t clientId, PedalBoard &pedalBoard);
+
 
     void GetPresets(PresetIndex*pResult);
     PedalBoard GetPreset(int64_t instanceId);

src/PiPedalSocket.cpp

@@ -277,18 +277,18 @@ JSON_MAP_REFERENCE(PedalBoardItemEnabledBody, instanceId)
 JSON_MAP_REFERENCE(PedalBoardItemEnabledBody, enabled)
 JSON_MAP_END()
 
-class SetCurrentPedalBoardBody
+class UpdateCurrentPedalBoardBody
 {
 public:
     int64_t clientId_ = -1;
     PedalBoard pedalBoard_;
 
-    DECLARE_JSON_MAP(SetCurrentPedalBoardBody);
+    DECLARE_JSON_MAP(UpdateCurrentPedalBoardBody);
 };
 
-JSON_MAP_BEGIN(SetCurrentPedalBoardBody)
+JSON_MAP_BEGIN(UpdateCurrentPedalBoardBody)
-JSON_MAP_REFERENCE(SetCurrentPedalBoardBody, clientId)
+JSON_MAP_REFERENCE(UpdateCurrentPedalBoardBody, clientId)
-JSON_MAP_REFERENCE(SetCurrentPedalBoardBody, pedalBoard)
+JSON_MAP_REFERENCE(UpdateCurrentPedalBoardBody, pedalBoard)
 JSON_MAP_END()
 
 class ChannelSelectionChangedBody
@@ -335,6 +335,26 @@ JSON_MAP_REFERENCE(ControlChangedBody, symbol)
 JSON_MAP_REFERENCE(ControlChangedBody, value)
 JSON_MAP_END()
 
+class Vst3ControlChangedBody
+{
+public:
+    int64_t clientId_;
+    int64_t instanceId_;
+    std::string symbol_;
+    float value_;
+    std::string state_;
+
+    DECLARE_JSON_MAP(Vst3ControlChangedBody);
+};
+JSON_MAP_BEGIN(Vst3ControlChangedBody)
+JSON_MAP_REFERENCE(Vst3ControlChangedBody, clientId)
+JSON_MAP_REFERENCE(Vst3ControlChangedBody, instanceId)
+JSON_MAP_REFERENCE(Vst3ControlChangedBody, symbol)
+JSON_MAP_REFERENCE(Vst3ControlChangedBody, value)
+JSON_MAP_REFERENCE(Vst3ControlChangedBody, state)
+JSON_MAP_END()
+
+
 class PiPedalSocketHandler : public SocketHandler, public IPiPedalModelSubscriber
 {
 private:
@@ -940,13 +960,13 @@ public:
             pReader->read(&body);
             model.SetPedalBoardItemEnable(body.clientId_, body.instanceId_, body.enabled_);
         }
-        else if (message == "setCurrentPedalBoard")
+        else if (message == "updateCurrentPedalBoard")
         {
             {
-                SetCurrentPedalBoardBody body;
+                UpdateCurrentPedalBoardBody body;
 
                 pReader->read(&body);
-                this->model.SetPedalBoard(body.clientId_, body.pedalBoard_);
+                this->model.UpdateCurrentPedalBoard(body.clientId_, body.pedalBoard_);
             }
         }
         else if (message == "currentPedalBoard")
@@ -1377,6 +1397,17 @@ public:
         }
     }
 
+    virtual void OnVst3ControlChanged(int64_t clientId, int64_t instanceId, const std::string &key, float value, const std::string &state)
+    {
+        Vst3ControlChangedBody body;
+        body.clientId_ = clientId;
+        body.instanceId_ = instanceId;
+        body.symbol_ = key;
+        body.value_ = value;
+        body.state_ = state;
+        Send("onVst3ControlChanged", body);
+    }
+
     virtual void OnControlChanged(int64_t clientId, int64_t instanceId, const std::string &key, float value)
     {
         ControlChangedBody body;
@@ -1544,7 +1575,7 @@ public:
 
     virtual void OnPedalBoardChanged(int64_t clientId, const PedalBoard &pedalBoard)
     {
-        SetCurrentPedalBoardBody body;
+        UpdateCurrentPedalBoardBody body;
         body.clientId_ = clientId;
         body.pedalBoard_ = pedalBoard;
         Send("onPedalBoardChanged", body);

src/RtInversionGuard.hpp

@@ -0,0 +1,69 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Robin E. R. Davies
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include "ss.hpp"
+#include "Lv2Log.hpp"
+
+namespace pipedal
+{
+
+    constexpr int RT_THREAD_PRIORITY = 80;
+    /**
+     * @brief RAII Priority boost to avoid Rt-thread priority inversion
+     * Boosts current thread to realtime priority for the duration of the current scope.
+     * Do this before acquiring a mutex that the RT thread might block on.
+     *
+     */
+
+    class RtInversionGuard
+    {
+    private:
+        int currentScheduler;
+        struct sched_param currentPriority;
+        ;
+
+    public:
+        RtInversionGuard()
+        {
+            currentScheduler = sched_getscheduler(0);
+            sched_getparam(0, &currentPriority);
+
+            struct sched_param param;
+            memset(&param, 0, sizeof(param));
+            param.sched_priority = RT_THREAD_PRIORITY;
+
+            int result = sched_setscheduler(0, SCHED_RR, &param);
+            if (result != 0)
+            {
+                Lv2Log::error(SS("Failed to set ALSA AudioThread priority. (" << strerror(result) << ")"));
+            }
+        }
+        ~RtInversionGuard()
+        {
+            sched_setscheduler(0, currentScheduler, &currentPriority);
+        }
+    };
+}

src/SplitEffect.cpp

@@ -20,7 +20,7 @@
 #include "pch.h"
 #include "SplitEffect.hpp"
 
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 #include "PedalBoard.hpp"
 
 using namespace pipedal;

src/SplitEffect.hpp

@@ -22,6 +22,7 @@
 #include "IEffect.hpp"
 #include "PiPedalException.hpp"
 #include "PiPedalMath.hpp"
+#include <assert.h>
 
 namespace pipedal
 {
@@ -60,6 +61,18 @@ namespace pipedal
     class SplitEffect : public IEffect
     {
     private:
+
+
+        virtual void SetAudioInputBuffer(int index, float *buffer) 
+        {
+            assert(false); // not used.
+        }
+        virtual void Run(uint32_t samples, RealtimeRingBufferWriter *realtimeRingBufferWriter) 
+        {
+            assert(false); // not used.
+        }
+
+
         const double MIX_TRANSITION_TIME_S = 0.1;
         double sampleRate;
         std::vector<float *> inputs;
@@ -283,6 +296,8 @@ namespace pipedal
         virtual std::string AtomToJson(uint8_t *pAtom) { return ""; }
         virtual std::string GetAtomObjectType(uint8_t*pData) { return "not implemented";}
 
+        virtual bool IsVst3() const { return false; }
+
     public:
         SplitEffect(
             uint64_t instanceId,
@@ -297,7 +312,7 @@ namespace pipedal
         }
 
 
-        virtual long GetInstanceId() const
+        virtual uint64_t GetInstanceId() const
         {
             return instanceId;
         }

src/Units.hpp

@@ -44,6 +44,7 @@ enum class Units  {
     pc,
     s,
     semitone12TET,
+    custom
 
 };
 

src/Vst3Effect.cpp

@@ -0,0 +1,885 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Robin E. R. Davies
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ss.hpp"
+#include <assert.h>
+#include "PiPedalHost.hpp"
+
+#include "vst3/Vst3Host.hpp"
+#include "Lv2Log.hpp"
+#include <unordered_map>
+#include <set>
+#include <unordered_set>
+#include <filesystem>
+
+#include "RingBufferReader.hpp"
+
+#include "public.sdk/source/vst/hosting/module.h"
+#include "public.sdk/source/vst/hosting/hostclasses.h"
+#include "public.sdk/source/vst/hosting/plugprovider.h"
+#include "public.sdk/source/common/memorystream.h"
+#include "pluginterfaces/vst/ivsteditcontroller.h"
+#include "pluginterfaces/vst/ivstaudioprocessor.h"
+#include "pluginterfaces/vst/ivstunits.h"
+#include "public.sdk/source/vst/utility/stringconvert.h"
+#include "public.sdk/source/vst/hosting/eventlist.h"
+#include "public.sdk/source/vst/hosting/parameterchanges.h"
+#include "public.sdk/source/vst/hosting/processdata.h"
+#include "pluginterfaces/vst/ivstaudioprocessor.h"
+#include "pluginterfaces/vst/ivstmidicontrollers.h"
+
+#include "public.sdk/samples/vst-hosting/audiohost/source/media/iparameterclient.h"
+#include "public.sdk/samples/vst-hosting/audiohost/source/media/imediaserver.h"
+
+#include <array>
+
+#include <sstream>
+#include "LiteralVersion.hpp"
+
+#include "Vst3MidiToEvent.hpp"
+
+#include "vst3/Vst3EffectImpl.hpp"
+#include "PiPedalHost.hpp"
+
+using namespace pipedal;
+
+std::unique_ptr<Vst3Effect> Vst3Effect::CreateInstance(uint64_t instanceId, const Vst3PluginInfo &info, IHost *pHost)
+{
+	std::unique_ptr<Vst3EffectImpl> result = std::make_unique<Vst3EffectImpl>();
+
+	result->Load(instanceId, info, pHost);
+
+	return std::move(result);
+}
+
+static double NaNGuard(double value)
+{
+	if (std::isnan(value)) return 0;
+	if (std::isinf(value)) return 0;
+	return value;
+}
+
+static uint32_t GetRefCount(FUnknown *p)
+{
+	p->addRef();
+	return p->release();
+}
+
+//------------------------------------------------------------------------
+// From Vst2Wrapper
+static MidiCCMapping initMidiCtrlerAssignment(IComponent *component, IMidiMapping *midiMapping)
+{
+	MidiCCMapping midiCCMapping{};
+
+	if (!midiMapping || !component)
+		return midiCCMapping;
+
+	int32 busses = std::min<int32>(component->getBusCount(kEvent, kInput), kMaxMidiMappingBusses);
+
+	if (midiCCMapping[0][0].empty())
+	{
+		for (int32 b = 0; b < busses; b++)
+			for (int32 i = 0; i < kMaxMidiChannels; i++)
+				midiCCMapping[b][i].resize(Vst::kCountCtrlNumber);
+	}
+
+	ParamID paramID;
+	for (int32 b = 0; b < busses; b++)
+	{
+		for (int16 ch = 0; ch < kMaxMidiChannels; ch++)
+		{
+			for (int32 i = 0; i < Vst::kCountCtrlNumber; i++)
+			{
+				paramID = kNoParamId;
+				if (midiMapping->getMidiControllerAssignment(b, ch, (CtrlNumber)i, paramID) ==
+					kResultTrue)
+				{
+					// TODO check if tag is associated to a parameter
+					midiCCMapping[b][ch][i] = paramID;
+				}
+				else
+					midiCCMapping[b][ch][i] = kNoParamId;
+			}
+		}
+	}
+	return midiCCMapping;
+}
+
+//------------------------------------------------------------------------
+static void assignBusBuffers(const IAudioClient::Buffers &buffers, HostProcessData &processData,
+							 bool unassign = false)
+{
+	// Set outputs
+	auto bufferIndex = 0;
+	for (auto busIndex = 0; busIndex < processData.numOutputs; busIndex++)
+	{
+		auto channelCount = processData.outputs[busIndex].numChannels;
+		for (auto chanIndex = 0; chanIndex < channelCount; chanIndex++)
+		{
+			if (bufferIndex < buffers.numOutputs)
+			{
+				processData.setChannelBuffer(BusDirections::kOutput, busIndex, chanIndex,
+											 unassign ? nullptr : buffers.outputs[bufferIndex]);
+				bufferIndex++;
+			}
+		}
+	}
+
+	// Set inputs
+	bufferIndex = 0;
+	for (auto busIndex = 0; busIndex < processData.numInputs; busIndex++)
+	{
+		auto channelCount = processData.inputs[busIndex].numChannels;
+		for (auto chanIndex = 0; chanIndex < channelCount; chanIndex++)
+		{
+			if (bufferIndex < buffers.numInputs)
+			{
+				processData.setChannelBuffer(BusDirections::kInput, busIndex, chanIndex,
+											 unassign ? nullptr : buffers.inputs[bufferIndex]);
+
+				bufferIndex++;
+			}
+		}
+	}
+}
+
+//------------------------------------------------------------------------
+static void unassignBusBuffers(const IAudioClient::Buffers &buffers, HostProcessData &processData)
+{
+	assignBusBuffers(buffers, processData, true);
+}
+
+//------------------------------------------------------------------------
+//  Vst3Processor
+//------------------------------------------------------------------------
+Vst3EffectImpl::Vst3EffectImpl()
+{
+	buffers.inputs = nullptr;
+	buffers.outputs = nullptr;
+	componentHandler.setEffect(this);
+}
+
+//------------------------------------------------------------------------
+Vst3EffectImpl::~Vst3EffectImpl()
+{
+	delete[] buffers.inputs;
+	delete[] buffers.outputs;
+	terminate();
+}
+
+//------------------------------------------------------------------------
+
+void Vst3EffectImpl::SetControl(int index, float value)
+{
+	this->parameterValues[index] = value;
+	ParamID paramId = lv2ToVstParam[index];
+
+	double normalizedValue = controller->plainParamToNormalized(paramId, value);
+	this->controller->setParamNormalized(paramId, normalizedValue);
+
+	{
+		RtInversionGuard inversionGuard; // boost priority to prevent priority inversion.
+		std::lock_guard guard{parameterMutex};
+
+		paramTransferrer.addChange(paramId, normalizedValue, 0);
+	}
+	if (!isProcessing)
+	{
+		Run(0, nullptr); // pump parameter changes on UI thread.
+	}
+}
+
+void Vst3EffectImpl::Load(uint64_t instanceId, const Vst3PluginInfo &info, IHost *pHost)
+{
+	processContext = {};
+	processContext.tempo = 120;
+
+
+	this->pHost = pHost;
+	this->instanceId = instanceId;
+	this->info = info;
+
+	size_t nControls = info.pluginInfo_.controls().size();
+
+	inputParameterChanges.setMaxParameters(nControls);
+	outputParameterChanges.setMaxParameters(nControls);
+
+	lv2ToVstParam.resize(nControls);
+	parameterValues.resize(nControls);
+	for (size_t i = 0; i < nControls; ++i)
+	{
+		const auto &control = info.pluginInfo_.controls()[i];
+		ParamID paramId;
+		std::stringstream ss(control.symbol());
+		ss >> paramId;
+
+		assert(i == control.index());
+
+		lv2ToVstParam[control.index()] = paramId;
+
+		parameterValues[control.index()] = control.default_value();
+		if (control.is_bypass())
+		{
+			bypassControl = i;
+		}
+	}
+
+	std::string error;
+	this->module = Module::create(info.filePath_, error);
+
+	if (!module)
+	{
+		throw Vst3Exception(SS("Vst3 load failed: " << error << "(" << info.filePath_ << ")"));
+	}
+	const PluginFactory &factory = module->getFactory();
+
+	ClassInfo myClassInfo;
+	bool foundClassInfo = false;
+
+	VST3::Optional<VST3::UID> myUid = VST3::UID::fromString(info.uid_);
+
+	if (!myUid)
+	{
+		throw Vst3Exception(SS("Invalid UID"));
+	}
+	for (const ClassInfo &classInfo : factory.classInfos())
+	{
+		if (classInfo.category() == kVstAudioEffectClass &&
+			classInfo.ID() == *myUid)
+		{
+			myClassInfo = classInfo;
+			foundClassInfo = true;
+		}
+	}
+	if (!foundClassInfo)
+	{
+		throw Vst3Exception(SS("Vst3 load failed: effect class not found in " << info.filePath_));
+	}
+
+	plugProvider = owned(NEW PlugProvider(factory, myClassInfo, true));
+
+	this->component = plugProvider->getComponent();
+	this->processor = component;
+
+	this->controller = plugProvider->getController();
+	controller->queryInterface(IMidiMapping::iid, (void **)&midiMapping);
+
+	paramTransferrer.setMaxParameters(1000);
+	if (midiMapping)
+		midiCCMapping = initMidiCtrlerAssignment(component, midiMapping);
+
+	setBlockSize((Steinberg::int32)pHost->GetMaxAudioBufferSize());
+	setSamplerate((SampleRate)pHost->GetSampleRate());
+
+	ProcessSetup setup{kRealtime, kSample32, blockSize, sampleRate};
+
+	initProcessData();
+
+	if (processor->setupProcessing(setup) != kResultOk)
+	{
+		throw Vst3Exception(SS(info.pluginInfo_.name() << ": setupProcessing() failed."));
+	}
+
+	if (component->setActive(true) != kResultOk)
+		throw Vst3Exception(SS(info.pluginInfo_.name() << ": setActive() failed."));
+
+	OPtr<IBStream> state = new MemoryStream();
+
+	assert(GetRefCount(state.get()) == 1);
+	this->supportsState = false;
+	if (component->getState(state) == kResultOk)
+	{
+		this->supportsState = true;
+		state->seek(0, IBStream::kIBSeekSet);
+		controller->setComponentState(state);
+		refreshControlValues();
+	}
+	IComponentHandler *handler;
+
+	controller->setComponentHandler(&componentHandler);
+
+	paramTransferrer.setMaxParameters(1000);
+
+	if (midiMapping)
+		midiCCMapping = initMidiCtrlerAssignment(component, midiMapping);
+
+	component->setActive(true);
+
+	for (size_t i = 0; i < this->lv2ToVstParam.size(); ++i)
+	{
+		fireControlChanged(i, (float)(controller->getParamNormalized(lv2ToVstParam[i])));
+	}
+}
+//------------------------------------------------------------------------
+//------------------------------------------------------------------------
+// void Vst3PluginImpl::createLocalMediaServer (const Name& name)
+// {
+// 	mediaServer = createMediaServer (name);
+// 	mediaServer->registerAudioClient (this);
+// 	mediaServer->registerMidiClient (this);
+// }
+
+//------------------------------------------------------------------------
+
+//------------------------------------------------------------------------
+void Vst3EffectImpl::terminate()
+{
+	// mediaServer = nullptr;
+
+	if (!processor)
+		return;
+
+	processor->setProcessing(false);
+	component->setActive(false);
+}
+
+//------------------------------------------------------------------------
+void Vst3EffectImpl::initProcessData()
+{
+	// processData.prepare will be done in setBlockSize
+
+	buffers.numInputs = info.pluginInfo_.audio_inputs();
+	buffers.numOutputs = info.pluginInfo_.audio_outputs();
+	buffers.numSamples = 0;
+	buffers.inputs = new float *[buffers.numInputs + 1];
+	buffers.outputs = new float *[buffers.numOutputs + 1];
+
+	for (size_t i = 0; i < buffers.numInputs + 1; ++i)
+	{
+		buffers.inputs[i] = nullptr;
+	}
+	for (size_t i = 0; i < buffers.numOutputs + 1; ++i)
+	{
+		buffers.outputs[i] = nullptr;
+	}
+
+	processData.inputEvents = &eventList;
+	processData.inputParameterChanges = &inputParameterChanges;
+	processData.outputParameterChanges = &outputParameterChanges;
+	processData.processContext = &processContext;
+
+	setSamplerate(pHost->GetSampleRate());
+	setBlockSize((Steinberg::int32)pHost->GetMaxAudioBufferSize());
+}
+
+//------------------------------------------------------------------------
+IMidiClient::IOSetup Vst3EffectImpl::getMidiIOSetup() const
+{
+	IMidiClient::IOSetup iosetup;
+	auto count = component->getBusCount(MediaTypes::kEvent, BusDirections::kInput);
+	for (int32_t i = 0; i < count; i++)
+	{
+		BusInfo info;
+		if (component->getBusInfo(MediaTypes::kEvent, BusDirections::kInput, i, info) != kResultOk)
+			continue;
+
+		auto busName = VST3::StringConvert::convert(info.name, 128);
+		iosetup.inputs.push_back(busName);
+	}
+
+	count = component->getBusCount(MediaTypes::kEvent, BusDirections::kOutput);
+	for (int32_t i = 0; i < count; i++)
+	{
+		BusInfo info;
+		if (component->getBusInfo(MediaTypes::kEvent, BusDirections::kOutput, i, info) !=
+			kResultOk)
+			continue;
+
+		auto busName = VST3::StringConvert::convert(info.name, 128);
+		iosetup.outputs.push_back(busName);
+	}
+
+	return iosetup;
+}
+
+//------------------------------------------------------------------------
+IAudioClient::IOSetup Vst3EffectImpl::getIOSetup() const
+{
+	IAudioClient::IOSetup iosetup;
+	auto count = component->getBusCount(MediaTypes::kAudio, BusDirections::kOutput);
+	for (int32_t i = 0; i < count; i++)
+	{
+		BusInfo info;
+		if (component->getBusInfo(MediaTypes::kAudio, BusDirections::kOutput, i, info) !=
+			kResultOk)
+			continue;
+
+		for (int32_t j = 0; j < info.channelCount; j++)
+		{
+			auto channelName = VST3::StringConvert::convert(info.name, 128);
+			iosetup.outputs.push_back(channelName + " " + std::to_string(j));
+		}
+	}
+
+	count = component->getBusCount(MediaTypes::kAudio, BusDirections::kInput);
+	for (int32_t i = 0; i < count; i++)
+	{
+		BusInfo info;
+		if (component->getBusInfo(MediaTypes::kAudio, BusDirections::kInput, i, info) != kResultOk)
+			continue;
+
+		for (int32_t j = 0; j < info.channelCount; j++)
+		{
+			auto channelName = VST3::StringConvert::convert(info.name, 128);
+			iosetup.inputs.push_back(channelName + " " + std::to_string(j));
+		}
+	}
+
+	return iosetup;
+}
+
+//------------------------------------------------------------------------
+void Vst3EffectImpl::preprocess(Buffers &buffers, int64_t continousFrames)
+{
+	processData.numSamples = buffers.numSamples;
+	processContext.continousTimeSamples = continousFrames;
+	assignBusBuffers(buffers, processData);
+
+	{
+		std::lock_guard guard{parameterMutex};
+
+		paramTransferrer.transferChangesTo(inputParameterChanges);
+	}
+	outputParameterChanges.clearQueue();
+}
+
+//------------------------------------------------------------------------
+bool Vst3EffectImpl::process(Buffers &buffers, int64_t continousFrames)
+{
+	if (!processor || !isProcessing)
+		return false;
+	buffers.numSamples = continousFrames;
+	preprocess(buffers, continousFrames);
+
+	if (processor->process(processData) != kResultOk)
+		return false;
+
+	postprocess(buffers);
+
+	return true;
+}
+//------------------------------------------------------------------------
+void Vst3EffectImpl::postprocess(Buffers &buffers)
+{
+	eventList.clear();
+	inputParameterChanges.clearQueue();
+	unassignBusBuffers(buffers, processData);
+}
+
+void Vst3EffectImpl::SendControlChanges(RealtimeRingBufferWriter *realtimeRingBufferWriter)
+{
+	for (auto i = 0; i < outputParameterChanges.getParameterCount(); ++i)
+	{
+		IParamValueQueue *queue = outputParameterChanges.getParameterData(i);
+		auto points = queue->getPointCount();
+		if (points != 0)
+		{
+			Steinberg::Vst::ParamValue value;
+			Steinberg::int32 sampleOffset;
+			queue->getPoint(points - 1, sampleOffset, value);
+
+			auto paramId = queue->getParameterId();
+
+			int thisControlId = -1;
+			for (size_t lv2Id = 0; lv2Id < this->lv2ToVstParam.size(); ++lv2Id)
+			{
+				if (lv2ToVstParam[lv2Id] == paramId)
+				{
+					thisControlId = (int)lv2Id;
+					break;
+				}
+			}
+			if (thisControlId != -1)
+			{
+				// realtimeRingBufferWriter->NotifyVst3ControlValue(this->instanceId,thisControlId,(float)value);
+			}
+		}
+	}
+}
+
+//------------------------------------------------------------------------
+bool Vst3EffectImpl::setSamplerate(SampleRate value)
+{
+	if (sampleRate == value)
+		return true;
+
+	sampleRate = value;
+	processContext.sampleRate = sampleRate;
+	if (blockSize == 0)
+		return true;
+	return true;
+}
+
+//------------------------------------------------------------------------
+bool Vst3EffectImpl::setBlockSize(int32 value)
+{
+	blockSize = value;
+	if (sampleRate == 0)
+		return true;
+
+	processData.prepare(*component, blockSize, kSample32);
+	return true;
+}
+
+//------------------------------------------------------------------------
+
+//------------------------------------------------------------------------
+bool Vst3EffectImpl::isPortInRange(int32 port, int32 channel) const
+{
+	return port < kMaxMidiMappingBusses && !midiCCMapping[port][channel].empty();
+}
+
+//------------------------------------------------------------------------
+bool Vst3EffectImpl::processVstEvent(const IMidiClient::Event &event, int32 port)
+{
+	auto vstEvent = midiToEvent(event.type, event.channel, event.data0, event.data1);
+	if (vstEvent)
+	{
+		vstEvent->busIndex = port;
+		if (eventList.addEvent(*vstEvent) != kResultOk)
+		{
+			assert(false && "Event was not added to EventList!");
+		}
+
+		return true;
+	}
+
+	return false;
+}
+
+//------------------------------------------------------------------------
+bool Vst3EffectImpl::processParamChange(const IMidiClient::Event &event, int32 port)
+{
+	auto paramMapping = [port, this](int32 channel, MidiData data1) -> ParamID
+	{
+		if (!isPortInRange(port, channel))
+			return kNoParamId;
+
+		return midiCCMapping[port][channel][data1];
+	};
+
+	auto paramChange =
+		midiToParameter(event.type, event.channel, event.data0, event.data1, paramMapping);
+	if (paramChange)
+	{
+		int32 index = 0;
+		IParamValueQueue *queue =
+			inputParameterChanges.addParameterData((*paramChange).first, index);
+		if (queue)
+		{
+			if (queue->addPoint(event.timestamp, (*paramChange).second, index) != kResultOk)
+			{
+				assert(false && "Parameter point was not added to ParamValueQueue!");
+			}
+		}
+
+		return true;
+	}
+
+	return false;
+}
+
+//------------------------------------------------------------------------
+bool Vst3EffectImpl::onEvent(const IMidiClient::Event &event, int32_t port)
+{
+	// Try to create Event first.
+	if (processVstEvent(event, port))
+		return true;
+
+	// In case this is no event it must be a parameter.
+	if (processParamChange(event, port))
+		return true;
+
+	// TODO: Something else???
+
+	return true;
+}
+
+//------------------------------------------------------------------------
+
+void Vst3EffectImpl::Activate()
+{
+	processor->setProcessing(true); // != kResultOk
+	this->isProcessing  = true;
+}
+
+void Vst3EffectImpl::Deactivate()
+{
+	if (isProcessing)
+	{
+		Run(0, nullptr); // make sure all pending events have been processed.
+		isProcessing = false;
+	}
+}
+
+void Vst3EffectImpl::Prepare(int32_t sampleRate, size_t maxBufferSize, int inputChannels, int outputChannels)
+{
+}
+void Vst3EffectImpl::Unprepare()
+{
+	if (isProcessing)
+	{
+		Deactivate();
+	}
+}
+
+ssize_t Vst3EffectImpl::ParamIdToLv2Id(ParamID id) const
+{
+	for (size_t i = 0; i < this->lv2ToVstParam.size(); ++i)
+	{
+		if (lv2ToVstParam[i] == id)
+		{
+			return (ssize_t)i;
+		}
+	}
+	return -1;
+}
+
+tresult Vst3EffectImpl::beginEdit(ParamID id)
+{
+	return kResultOk;
+}
+tresult Vst3EffectImpl::performEdit(ParamID id, ParamValue valueNormalized)
+{
+	int ix = ParamIdToLv2Id(id);
+	if (ix != -1)
+	{
+		fireControlChanged(ix, (float)valueNormalized);
+	}
+	return kResultOk;
+}
+
+tresult Vst3EffectImpl::endEdit(ParamID id)
+{
+	return kResultOk;
+}
+
+void Vst3EffectImpl::transferControllerStateToComponent()
+{
+	OPtr<IRtStream> bStream = this->streamPool.AllocateBStream();
+	assert(GetRefCount(bStream.get()) == 1);
+
+	RtInversionGuard inversionGuard; // boost priority to prevent priority inversion.
+	std::lock_guard guard{parameterMutex};
+
+	paramTransferrer.removeChanges();
+
+	// assume that parameters are straightforward and uncomplicated if they
+	// didn't provide BStream-based state management
+	// Vst2 used to do this. It's not clear that this is still legal in Vst3.
+
+	for (int index = 0; index < this->lv2ToVstParam.size(); ++index)
+	{
+		ParamID paramId = lv2ToVstParam[index];
+		paramTransferrer.addChange(paramId,
+									controller->plainParamToNormalized(paramId, parameterValues[index]),
+									0);
+	}
+	if (!this->isProcessing)
+	{
+		Run(0,nullptr);
+	}
+}
+
+
+tresult Vst3EffectImpl::restartComponent(int32 flags)
+{
+	if (flags & (RestartFlags::kParamValuesChanged))
+	{
+		refreshControlValues();
+		transferControllerStateToComponent();
+	}
+
+	return kResultOk;
+}
+
+static std::vector<uint8_t> StreamToVec(IBStream *stream)
+{
+	Steinberg::int64 length;
+	stream->seek(0, IBStream::kIBSeekEnd, &length);
+	stream->seek(0, IBStream::kIBSeekSet);
+	std::vector<uint8_t> result;
+	result.resize(length);
+	Steinberg::int32 numRead = 0;
+	stream->read(&result[0], length, &numRead);
+	if (numRead != length)
+	{
+		throw Vst3Exception("Failed to read.");
+	}
+	return result;
+}
+
+void Vst3EffectImpl::CheckSync()
+{
+	OPtr<IBStream> stream{new MemoryStream()};
+
+	if (this->controller->getState(stream) == kResultOk)
+	{
+		std::vector<uint8_t> initialState = StreamToVec(stream);
+		OPtr<IBStream> stream2{new MemoryStream()};
+		this->component->getState(stream2);
+		stream2->seek(0, IBStream::kIBSeekSet);
+		this->controller->setState(stream2);
+
+		OPtr<IBStream> stream3{new MemoryStream()};
+		this->controller->getState(stream3);
+		std::vector<uint8_t> newState = StreamToVec(stream3);
+
+		if (initialState.size() != newState.size())
+		{
+			throw Vst3Exception("State changed.");
+		}
+		for (size_t i = 0; i < newState.size(); ++i)
+		{
+			if (initialState[i] != newState[i])
+			{
+				throw Vst3Exception("State changed.");
+			}
+		}
+	}
+}
+
+bool Vst3EffectImpl::GetState(std::vector<uint8_t>*state)
+{
+	OPtr<IBStream> stream{new MemoryStream()};
+
+	if (component->getState(stream) != kResultOk)
+	{
+		return false;
+	}
+	Steinberg::int64 length = 0;
+	if (stream->seek(0, IBStream::kIBSeekEnd, &length) != kResultOk)
+	{
+		return false;
+	}
+	stream->seek(0, IBStream::kIBSeekSet);
+	std::vector<uint8_t> result;
+
+	result.resize(length);
+	int64 ix = 0;
+	while (length != 0)
+	{
+		int32 thisTime;
+		if (length > 0x10000000)
+		{
+			thisTime = 0x10000000;
+		}
+		else
+		{
+			thisTime = (int32)length;
+		}
+		if (stream->read((void *)(&result[ix]), thisTime, &thisTime) != kResultOk)
+		{
+			throw Vst3Exception(this->info.pluginInfo_.name() + ": Failed to read state.");
+		}
+		if (thisTime == 0)
+		{
+			throw Vst3Exception(this->info.pluginInfo_.name() + ": Unexpected end of file while reading state.");
+		}
+		ix += thisTime;
+		length -= thisTime;
+	}
+	*state = std::move(result);
+	return true;
+}
+void Vst3EffectImpl::SetState(const std::vector<uint8_t> state)
+{
+	OPtr<IBStream> stream{new MemoryStream((void *)(&state[0]), state.size())};
+
+	if (controller->setComponentState(stream) != kResultOk)
+	{
+		throw Vst3Exception(this->info.pluginInfo_.name() + " Failed to restore state.");
+	}
+	refreshControlValues();
+	stream->seek(0,IBStream::kIBSeekSet);
+	if (component->setState(stream) != kResultOk)
+	{
+		transferControllerStateToComponent();
+	}
+}
+
+void Vst3EffectImpl::refreshControlValues()
+{
+	for (size_t i = 0; i < lv2ToVstParam.size(); ++i)
+	{
+		fireControlChanged(i, controller->getParamNormalized(lv2ToVstParam[i]));
+	}
+}
+std::vector<Vst3ProgramList> Vst3EffectImpl::GetProgramList(int32_t programListId)
+{
+	std::vector<Vst3ProgramList> result;
+
+	FUnknownPtr<IUnitInfo> iUnitInfo(controller);
+	if (!iUnitInfo)
+		throw Vst3Exception("Invalid unit info");
+
+	int count = iUnitInfo->getProgramListCount();
+	for (int i = 0; i < count; ++i)
+	{
+		ProgramListInfo programListInfo;
+		if (iUnitInfo->getProgramListInfo(i, programListInfo) != kResultOk)
+		{
+			break;
+		}
+		if (programListInfo.id == programListId)
+		{
+			Vst3ProgramList list;
+
+			list.name = VST3::StringConvert::convert(programListInfo.name);
+
+			for (int prog = 0; prog < programListInfo.programCount; ++prog)
+			{
+				Vst::String128 progName;
+				if (iUnitInfo->getProgramName(programListInfo.id, prog, progName) == kResultOk)
+				{
+					Vst3ProgramListEntry entry;
+					entry.id = prog;
+					entry.name = VST3::StringConvert::convert(progName);
+					list.programs.push_back(std::move(entry));
+				}
+			}
+			result.push_back(std::move(list));
+		}
+	}
+	return result;
+}
+
+void Vst3EffectImpl::fireControlChanged(int control, float normalizedValue)
+{
+	normalizedValue = NaNGuard(normalizedValue);
+	float plainValue = NaNGuard(this->controller->normalizedParamToPlain(this->lv2ToVstParam[control], normalizedValue));
+	if (parameterValues[control] != plainValue)
+	{
+		parameterValues[control] = plainValue;
+		controlChangedHandler(control,plainValue);
+	}
+}
+
+JSON_MAP_BEGIN(Vst3PluginInfo)
+JSON_MAP_REFERENCE(Vst3PluginInfo, filePath)
+JSON_MAP_REFERENCE(Vst3PluginInfo, version)
+JSON_MAP_REFERENCE(Vst3PluginInfo, uid)
+JSON_MAP_REFERENCE(Vst3PluginInfo, pluginInfo)
+
+JSON_MAP_END()

src/Vst3Host.cpp

@@ -0,0 +1,689 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Robin E. R. Davies
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
+#include "ss.hpp"
+#include "PiPedalHost.hpp"
+#include "vst3/Vst3Host.hpp"
+#include "Lv2Log.hpp"
+#include <unordered_map>
+#include <set>
+#include <unordered_set>
+#include <filesystem>
+#include "public.sdk/source/vst/hosting/module.h"
+#include "public.sdk/source/vst/hosting/hostclasses.h"
+#include "public.sdk/source/vst/hosting/plugprovider.h"
+#include "pluginterfaces/vst/ivsteditcontroller.h"
+#include "pluginterfaces/vst/ivstaudioprocessor.h"
+#include "pluginterfaces/vst/ivstunits.h"
+#include "public.sdk/source/vst/utility/stringconvert.h"
+#include "public.sdk/source/vst/hosting/eventlist.h"
+#include "public.sdk/source/vst/hosting/parameterchanges.h"
+#include "public.sdk/source/vst/hosting/processdata.h"
+#include "pluginterfaces/vst/ivstaudioprocessor.h"
+#include "pluginterfaces/vst/ivstmidicontrollers.h"
+
+#include "public.sdk/samples/vst-hosting/audiohost/source/media/iparameterclient.h"
+#include "public.sdk/samples/vst-hosting/audiohost/source/media/imediaserver.h"
+
+#include <array>
+
+#include <sstream>
+#include "LiteralVersion.hpp"
+#include "json.hpp"
+
+using namespace std;
+using namespace pipedal;
+using namespace VST3::Hosting;
+using namespace Steinberg;
+using namespace Steinberg::Vst;
+
+namespace pipedal
+{
+
+	class Vst3HostApplication : public HostApplication
+	{
+	public:
+		Vst3HostApplication() {}
+		//--- IHostApplication ---------------
+		tresult PLUGIN_API getName(String128 name)
+		{
+			return VST3::StringConvert::convert("PiPedal", name) ? kResultTrue : kInternalError;
+		}
+	};
+
+	class Vst3HostImpl : public Vst3Host
+	{
+	private:
+		OPtr<Vst3HostApplication> hostApplication;
+		std::string cacheFilePath;
+
+	public:
+		Vst3HostImpl(const std::string&cacheFilePath);
+
+		const Vst3Host::PluginList &RescanPlugins() override;
+		const Vst3Host::PluginList &RefreshPlugins() override;
+		const Vst3Host::PluginList &getPluginList() override { return pluginList; }
+
+		std::unique_ptr<Vst3Effect> CreatePlugin(long instanceId, const std::string &url, IHost *pHost) override;
+		std::unique_ptr<Vst3Effect> CreatePlugin(PedalBoardItem&pedalBoardItem, IHost*pHost) override;
+
+	private:
+		Lv2PluginUiInfo *GetPluginInfo(const std::string&uri);
+
+		void LoadPluginCache();
+		void SavePluginCache();
+
+		bool havePluginsChanged() const;
+		PluginList pluginList;
+
+		void EnsureContext();
+		std::unique_ptr<Vst3PluginInfo> MakeDetailedPluginInfo(const PluginFactory &factory, const ClassInfo &classInfo, const std::string &path);
+
+		void MakeVst3Info(const std::filesystem::path &path, Vst3Host::PluginList &list);
+	};
+
+	Vst3Host::Ptr Vst3Host::CreateInstance(const std::string&cacheFilePath)
+	{
+		return std::make_unique<Vst3HostImpl>(cacheFilePath);
+	}
+
+	//--------------------------------------------------------------
+
+} // namespace pipedal
+
+Vst3HostImpl::Vst3HostImpl(const std::string&cacheFilePath)
+:cacheFilePath(cacheFilePath)
+{
+	this->hostApplication = new Vst3HostApplication();
+	EnsureContext();
+
+}
+
+
+static bool hasSubCategory(const ClassInfo &classInfo, const std::string &subcategory)
+{
+	for (auto &category : classInfo.subCategories())
+	{
+		if (category == subcategory)
+		{
+			return true;
+		}
+	}
+	return false;
+}
+static PluginType getVst3PluginType(const ClassInfo &classInfo)
+{
+	if (hasSubCategory(classInfo, "Instrument"))
+	{
+		return PluginType::InstrumentPlugin;
+	}
+	if (!hasSubCategory(classInfo, "Fx"))
+	{
+		return PluginType::InvalidPlugin;
+	}
+
+	// kFxAnalyzer			= "Fx|Analyzer";	///< Scope, FFT-Display, Loudness Processing...
+	if (hasSubCategory(classInfo, "Analyzer"))
+	{
+		return PluginType::AnalyserPlugin;
+	}
+	// kFxDelay				= "Fx|Delay";		///< Delay, Multi-tap Delay, Ping-Pong Delay...
+	if (hasSubCategory(classInfo, "Delay"))
+	{
+		return PluginType::DelayPlugin;
+	}
+
+	// kFxDistortion			= "Fx|Distortion";	///< Amp Simulator, Sub-Harmonic, SoftClipper...
+	if (hasSubCategory(classInfo, "Distortion"))
+	{
+		return PluginType::DistortionPlugin;
+	}
+	// kFxDynamics			= "Fx|Dynamics";	///< Compressor, Expander, Gate, Limiter, Maximizer, Tape Simulator, EnvelopeShaper...
+	if (hasSubCategory(classInfo, "Dynamics"))
+	{
+		return PluginType::DynamicsPlugin;
+	}
+	// kFxEQ					= "Fx|EQ";			///< Equalization, Graphical EQ...
+	if (hasSubCategory(classInfo, "EQ"))
+	{
+		return PluginType::EQPlugin;
+	}
+
+	// kFxFilter				= "Fx|Filter";		///< WahWah, ToneBooster, Specific Filter,...
+	if (hasSubCategory(classInfo, "Filter"))
+	{
+		return PluginType::FilterPlugin;
+	}
+
+	// kFx					= "Fx";				///< others type (not categorized)
+	// kFxSpatial				= "Fx|Spatial";		///< MonoToStereo, StereoEnhancer,...
+	if (hasSubCategory(classInfo, "Spatial"))
+	{
+		return PluginType::SpatialPlugin;
+	}
+
+	// kFxGenerator			= "Fx|Generator";	///< Tone Generator, Noise Generator...
+	if (hasSubCategory(classInfo, "Generator"))
+	{
+		return PluginType::GeneratorPlugin;
+	}
+
+	// kFxReverb				= "Fx|Reverb";		///< Reverberation, Room Simulation, Convolution Reverb...
+	if (hasSubCategory(classInfo, "Reverb"))
+	{
+		return PluginType::ReverbPlugin;
+	}
+	// kFxPitchShift			= "Fx|Pitch Shift";	///< Pitch Processing, Pitch Correction, Vocal Tuning...
+	if (hasSubCategory(classInfo, "Pitch Shift"))
+	{
+		return PluginType::PitchPlugin;
+	}
+
+	// kFxModulation			= "Fx|Modulation";	///< Phaser, Flanger, Chorus, Tremolo, Vibrato, AutoPan, Rotary, Cloner...
+	if (hasSubCategory(classInfo, "Modulation"))
+	{
+		return PluginType::ModulatorPlugin;
+	}
+
+	// kFxRestoration			= "Fx|Restoration";	///< Denoiser, Declicker,...
+	if (hasSubCategory(classInfo, "Restoration"))
+	{
+		return PluginType::UtilityPlugin;
+	}
+	// kFxSurround			= "Fx|Surround";	///< dedicated to surround processing: LFE Splitter, Bass Manager...
+	if (hasSubCategory(classInfo, "Surround"))
+	{
+		return PluginType::UtilityPlugin;
+	}
+
+	// kFxTools				= "Fx|Tools";		///< Volume, Mixer, Tuner...
+	if (hasSubCategory(classInfo, "Tools"))
+	{
+		return PluginType::UtilityPlugin;
+	}
+	// kFxMastering			= "Fx|Mastering";	///< Dither, Noise Shaping,...
+	if (hasSubCategory(classInfo, "Mastering"))
+	{
+		return PluginType::UtilityPlugin;
+	}
+
+	// kFxNetwork				= "Fx|Network";		///< using Network
+	if (hasSubCategory(classInfo, "Network"))
+	{
+		return PluginType::UtilityPlugin;
+	}
+	// kFxInstrument			= "Fx|Instrument";	///< Fx which could be loaded as Instrument too
+	// kFxInstrumentExternal	= "Fx|Instrument|External";	///< Fx which could be loaded as Instrument too and is external (wrapped Hardware)
+	if (hasSubCategory(classInfo, "Instrument"))
+	{
+		return PluginType::InstrumentPlugin;
+	}
+	return PluginType::Plugin;
+}
+
+void Vst3HostImpl::EnsureContext()
+{
+	PluginContextFactory::instance().setPluginContext(this->hostApplication);
+}
+
+unique_ptr<Vst3PluginInfo> Vst3HostImpl::MakeDetailedPluginInfo(const PluginFactory &factory, const ClassInfo &classInfo, const std::string &path)
+{
+	IPtr<PlugProvider> plugProvider = owned(NEW PlugProvider(factory, classInfo, true));
+	{
+		OPtr<IComponent> component = plugProvider->getComponent();
+		OPtr<IEditController> controller = plugProvider->getController();
+
+		FUnknownPtr<IMidiMapping> midiMapping(controller);
+
+		FUnknownPtr<IUnitInfo> iUnitInfo(controller);
+
+		unique_ptr<Vst3PluginInfo> info = make_unique<Vst3PluginInfo>();
+
+		info->filePath_ = path;
+		info->version_ = classInfo.version();
+		info->uid_ = classInfo.ID().toString();
+
+		Lv2PluginUiInfo &pluginInfo = info->pluginInfo_;
+
+		pluginInfo.uri(SS("vst3:" << classInfo.ID().toString()));
+
+		pluginInfo.is_vst3(true);
+		pluginInfo.name(classInfo.name());
+		pluginInfo.author_name(classInfo.vendor());
+
+		pluginInfo.plugin_type(
+			getVst3PluginType(classInfo));
+		pluginInfo.plugin_display_type(""); // fill this in later. VSTHost has list of name translations; we don;'t.
+
+		if (iUnitInfo)
+		{
+			auto nUnits = iUnitInfo->getUnitCount();
+			for (int i = 0; i < nUnits; ++i)
+			{
+				Steinberg::Vst::UnitInfo unitInfo;
+				iUnitInfo->getUnitInfo(i, unitInfo);
+				Lv2PluginUiPortGroup portGroup(
+					SS(unitInfo.id), VST3::StringConvert::convert(unitInfo.name), SS(unitInfo.parentUnitId), unitInfo.programListId);
+
+				pluginInfo.port_groups().push_back(portGroup);
+			}
+		}
+
+		auto nParams = controller->getParameterCount();
+		for (int32 param = 0; param < nParams; ++param)
+		{
+			Steinberg::Vst::ParameterInfo info;
+			tresult tErr = controller->getParameterInfo(param, info);
+
+			Lv2PluginUiControlPort port;
+			port.index(param);		  // used for LV2 purposes.
+			port.symbol(SS(info.id)); // Used for VST3 purposes. convert to int to specifiy a vst control id.
+
+			std::string shortTitle = VST3::StringConvert::convert(info.shortTitle);
+			std::string title = VST3::StringConvert::convert(info.title);
+			if (shortTitle.length() == 0)
+			{
+				shortTitle = title;
+			}
+			port.name(shortTitle);
+			port.comment(title);
+
+
+			// guard against NaN value (mda Talkbox)
+			port.display_priority(param);
+
+			bool isList = (info.flags & ParameterInfo::kIsList) != ParameterInfo::kNoFlags;
+			bool canAutomate = (info.flags & ParameterInfo::kCanAutomate) != ParameterInfo::kNoFlags;
+			bool isProgramChange = (info.flags & ParameterInfo::kIsProgramChange) != ParameterInfo::kNoFlags;
+			bool isReadOnly = (info.flags & ParameterInfo::kIsReadOnly) != ParameterInfo::kNoFlags;
+			bool notOnGui = (info.flags & ParameterInfo::kIsHidden) != ParameterInfo::kNoFlags;
+			bool isBypass = (info.flags & ParameterInfo::kIsBypass) != ParameterInfo::kNoFlags;
+
+			port.is_bypass(isBypass);
+
+			port.not_on_gui(isReadOnly | notOnGui);
+
+			port.min_value(controller->normalizedParamToPlain(info.id,0));
+			port.max_value(controller->normalizedParamToPlain(info.id,1));
+
+			double t = controller->normalizedParamToPlain(info.id,info.defaultNormalizedValue);
+			if (std::isnan(t) || std::isinf(t))
+			{
+				t = 0;
+			} 
+
+			port.default_value(t);
+
+			port.range_steps(info.stepCount == 0 ? 0 : info.stepCount + 1);
+			if (isList && !isProgramChange)
+			{
+				port.enumeration_property(true);
+				for (int i = 0; i <= info.stepCount; ++i)
+				{
+					double normalizedValue;
+					if (info.stepCount == 0)
+					{
+						normalizedValue = 0;
+					}
+					else
+					{
+						normalizedValue = i * 1.0 / (info.stepCount);
+					}
+
+					String128 strValue;
+					if (controller->getParamStringByValue(info.id, normalizedValue, strValue) == kResultOk)
+					{
+						Lv2ScalePoint scalePoint((float)controller->normalizedParamToPlain(info.id,normalizedValue), VST3::StringConvert::convert(strValue));
+						port.scale_points().push_back(scalePoint);
+					}
+				}
+			}
+			if (info.unitId != 0)
+			{
+				port.port_group(SS(info.unitId));
+			}
+			std::string units = VST3::StringConvert::convert(info.units);
+			if (units.size() != 0)
+			{
+				if (units == "dB")
+				{
+					port.units(Units::db);
+				} else if (units == "%")
+				{
+					port.units(Units::pc);
+				} else if (units == "Hz")
+				{
+					port.units(Units::hz);
+				} else if (units == "kHz")
+				{
+					port.units(Units::khz);
+				} else if (units == "sec" || units == "s")
+				{
+					port.units(Units::s);
+				} else if (units == "ms")
+				{
+					port.units(Units::ms);
+				} else if (units == "cent")
+				{
+					port.units(Units::cent);
+				} else {
+					port.units(Units::custom);
+					port.custom_units(units);
+				}
+			}
+
+			pluginInfo.controls().push_back(port);
+		}
+
+		auto count = component->getBusCount(MediaTypes::kAudio, BusDirections::kOutput);
+		for (int32_t i = 0; i < count; i++)
+		{
+			BusInfo busInfo;
+			if (component->getBusInfo(MediaTypes::kAudio, BusDirections::kOutput, i, busInfo) ==
+				kResultOk)
+			{
+				auto channelName = VST3::StringConvert::convert(busInfo.name, 128);
+
+				if (busInfo.busType == BusTypes::kMain) // aux channels not currently supported.
+				{
+					pluginInfo.audio_outputs(pluginInfo.audio_outputs() + busInfo.channelCount);
+				}
+			}
+		}
+		count = component->getBusCount(MediaTypes::kAudio, BusDirections::kInput);
+		for (int32_t i = 0; i < count; i++)
+		{
+			BusInfo busInfo;
+			if (component->getBusInfo(MediaTypes::kAudio, BusDirections::kInput, i, busInfo) ==
+				kResultOk)
+			{
+				auto channelName = VST3::StringConvert::convert(busInfo.name, 128);
+
+				if (busInfo.busType == BusTypes::kMain) // aux channels not currently supported.
+				{
+					pluginInfo.audio_inputs(pluginInfo.audio_inputs() + busInfo.channelCount);
+				}
+			}
+		}
+		count = component->getBusCount(MediaTypes::kEvent, BusDirections::kInput);
+		if (count >= 1)
+		{
+			pluginInfo.has_midi_input(1);
+		}
+		count = component->getBusCount(MediaTypes::kEvent, BusDirections::kOutput);
+		if (count >= 1)
+		{
+			pluginInfo.has_midi_output(1);
+		}
+		return info;
+	}
+}
+void Vst3HostImpl::MakeVst3Info(const std::filesystem::path &path, Vst3Host::PluginList &list)
+{
+
+	EnsureContext();
+	unique_ptr<Vst3PluginInfo> result = std::make_unique<Vst3PluginInfo>();
+	result->filePath_ = path;
+
+	string error;
+	Module::Ptr module = Module::create(path.string(), error);
+
+	if (!module)
+	{
+		Lv2Log::error(SS("Vst3 load failed: " << error << "(" << path.string() << ")"));
+		return;
+	}
+	const PluginFactory &factory = module->getFactory();
+
+	for (const ClassInfo &classInfo : factory.classInfos())
+	{
+		if (classInfo.category() == kVstAudioEffectClass)
+		{
+			bool found = false;
+			std::string newUid = classInfo.ID().toString();
+			for (const auto &existingPlugin : list)
+			{
+				if (existingPlugin->uid_ == newUid)
+				{
+					found = true;
+					break; // first instance takes precedence (e.g. ~/.vst3 takes precedence over /usr/lib/vst3 )
+				}
+			}
+			if (!found)
+			{
+				std::unique_ptr<Vst3PluginInfo> pluginInfo = MakeDetailedPluginInfo(factory, classInfo, path);
+
+				list.push_back(std::move(pluginInfo));
+			}
+		}
+	}
+}
+
+bool Vst3HostImpl::havePluginsChanged() const
+{
+
+	std::unordered_set<std::string> modules;
+
+	for (const auto &plugin : pluginList)
+	{
+		if (!std::filesystem::exists(plugin->filePath_))
+		{
+			return true;
+		}
+		modules.insert(plugin->filePath_);
+	}
+	Module::PathList pathList = Module::getModulePaths();
+
+	for (const auto &path : pathList)
+	{
+		if (!modules.contains(path))
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+const Vst3Host::PluginList &Vst3HostImpl::RefreshPlugins()
+{
+	if (cacheFilePath.length() != 0)
+	{
+		LoadPluginCache();
+	}
+	if (havePluginsChanged())
+	{
+		RescanPlugins();
+	}
+	return pluginList;
+}
+
+const Vst3Host::PluginList &Vst3HostImpl::RescanPlugins()
+{
+	Module::PathList pathList = Module::getModulePaths();
+
+	PluginList list;
+
+	//pathList.insert(pathList.begin(),"/home/pi/.vst3/mda-vst3.vst3");
+	
+	for (auto &path : pathList)
+	{
+		if (path == std::string("/home/pi/.vst3/mda-vst3.vst3"))
+		{
+			Lv2Log::debug("Processing MDA plugins");
+		}
+		filesystem::path p{path};
+		MakeVst3Info(p, list);
+	}
+	this->pluginList = std::move(list);
+	SavePluginCache();
+	return pluginList;
+}
+
+static std::string ParseVst3Url(const std::string &url)
+{
+	if (!url.starts_with("vst3:"))
+	{
+		throw Vst3Exception("Not a valid vst3 url.: " + url);
+	}
+	std::string strUrl = url.substr(5);
+	return strUrl;
+}
+
+std::unique_ptr<Vst3Effect> Vst3HostImpl::CreatePlugin(long instanceId, const std::string &url, IHost *pHost)
+{
+	EnsureContext();
+
+	auto uuid = ParseVst3Url(url);
+
+	std::unique_ptr<Vst3Effect> result;
+
+	for (const auto &plugin : pluginList)
+	{
+		if (plugin->uid_ == uuid)
+		{
+			return Vst3Effect::CreateInstance(instanceId, *(plugin.get()), pHost);
+		}
+	}
+	throw Vst3Exception("Plugin not found.");
+}
+
+static inline uint8_t Hex(char c)
+{
+	if (c >= '0' && c <= '9') return c-'0';
+	if (c >= 'a' && c <= 'z') return c-'a'+10;
+	if (c >= 'A' && c <= 'Z') return c-'A'+10;
+
+	throw Vst3Exception("Invalid state bundle.");
+}
+
+static std::vector<uint8_t> HexToByteArray(const std::string&hexState)
+{
+	std::vector<uint8_t> result;
+	result.resize(hexState.length()/2);
+	for (int i = 0; i < result.size(); ++i)
+	{
+		result[i] = Hex(hexState[i*2])*16 + Hex(hexState[i*2+1]);
+	}
+	return result;
+}
+std::unique_ptr<Vst3Effect> Vst3HostImpl::CreatePlugin(PedalBoardItem&pedalBoardItem, IHost*pHost)
+{
+	std::unique_ptr<Vst3Effect> result = CreatePlugin(pedalBoardItem.instanceId(),pedalBoardItem.uri(),pHost);
+	auto pluginInfo = this->GetPluginInfo(pedalBoardItem.uri());
+	if (!pluginInfo)
+	{
+		throw Vst3Exception(SS("Plugin " << pedalBoardItem.pluginName() << " not found."));
+	}
+	if (pedalBoardItem.vstState().length() != 0)
+	{
+		std::vector<uint8_t> state = HexToByteArray(pedalBoardItem.vstState());
+		result->SetState(state);
+
+		for (ControlValue &controlValue: pedalBoardItem.controlValues())
+		{
+			int32_t index = -1;
+			for (size_t i = 0; i < pluginInfo->controls().size(); ++i)
+			{
+				if (pluginInfo->controls()[i].symbol() == controlValue.key())
+				{
+					index = (int32_t)(pluginInfo->controls()[i].index());
+					break;
+				}
+			}
+			if (index != -1)
+			{
+				float value = result->GetControlValue(index);
+				controlValue.value(value);
+			}
+			
+		}
+
+	} else {
+		for (const ControlValue &controlValue: pedalBoardItem.controlValues())
+		{
+			int32_t index = -1;
+			for (size_t i = 0; i < pluginInfo->controls().size(); ++i)
+			{
+				if (pluginInfo->controls()[i].symbol() == controlValue.key())
+				{
+					index = (int32_t)(pluginInfo->controls()[i].index());
+					break;
+				}
+			}
+			if (index != -1)
+			{
+				result->SetControl(index,controlValue.value());
+			}
+			
+		}
+	}
+	return result;
+}
+
+
+#include <fstream>
+
+void Vst3HostImpl::LoadPluginCache()
+{
+	if (cacheFilePath.length() != 0)
+	{
+		std::ifstream f(cacheFilePath);
+		if (f.is_open())
+		{
+			json_reader reader(f);
+
+			reader.read(&(this->pluginList));
+		}
+	
+	}
+}
+void Vst3HostImpl::SavePluginCache()
+{
+	if (cacheFilePath.length() != 0)
+	{
+		std::ofstream f(cacheFilePath);
+		if (f.is_open())
+		{
+			json_writer writer(f);
+
+			writer.write(this->pluginList);
+		}
+		
+	}
+
+}
+
+Lv2PluginUiInfo *Vst3HostImpl::GetPluginInfo(const std::string&uri)
+{
+	for (const auto &pluginInfo: pluginList)
+	{
+		if (pluginInfo->pluginInfo_.uri() == uri)
+		{
+			return &(pluginInfo->pluginInfo_);
+		}
+	}
+	return nullptr;
+}
+		

src/Vst3MidiToEvent.hpp

@@ -0,0 +1,159 @@
+//-----------------------------------------------------------------------------
+// Flags       : clang-format auto
+// Project     : VST SDK
+//
+// Category    : AudioHost
+// Filename    : public.sdk/samples/vst-hosting/audiohost/source/media/miditovst.h
+// Created by  : Steinberg 09.2016
+// Description : Audio Host Example for VST 3
+//
+//-----------------------------------------------------------------------------
+// LICENSE
+// (c) 2022, Steinberg Media Technologies GmbH, All Rights Reserved
+//-----------------------------------------------------------------------------
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistributions of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//   * Neither the name of the Steinberg Media Technologies nor the names of its
+//     contributors may be used to endorse or promote products derived from this
+//     software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+// OF THE POSSIBILITY OF SUCH DAMAGE.
+//-----------------------------------------------------------------------------
+
+#pragma once
+
+#include "public.sdk/source/vst/utility/optional.h"
+#include "pluginterfaces/vst/ivstevents.h"
+#include "pluginterfaces/vst/ivstmidicontrollers.h"
+#include <functional>
+#include <limits>
+
+//------------------------------------------------------------------------
+namespace Steinberg {
+namespace Vst {
+
+const uint8_t kNoteOff = 0x80; ///< note, off velocity
+const uint8_t kNoteOn = 0x90; ///< note, on velocity
+const uint8_t kPolyPressure = 0xA0; ///< note, pressure
+const uint8_t kController = 0xB0; ///< controller, value
+const uint8_t kProgramChangeStatus = 0xC0; ///< program change
+const uint8_t kAfterTouchStatus = 0xD0; ///< channel pressure
+const uint8_t kPitchBendStatus = 0xE0; ///< lsb, msb
+static const uint32 kDataMask = 0x7F;
+
+const float kMidiScaler = 1.f / 127.f;
+
+using MidiData = uint8_t;
+
+float toNormalized (const MidiData& data)
+{
+	return (float)data * kMidiScaler;
+}
+
+using OptionalEvent = VST3::Optional<Event>;
+
+using ParameterChange = std::pair<ParamID, ParamValue>;
+using OptionParamChange = VST3::Optional<ParameterChange>;
+
+OptionalEvent midiToEvent (MidiData status, MidiData channel, MidiData midiData0,
+                           MidiData midiData1)
+{
+	Event new_event = {};
+	if (status == kNoteOn || status == kNoteOff)
+	{
+		if (status == kNoteOff) // note off
+		{
+			new_event.noteOff.noteId = -1;
+			new_event.type = Event::kNoteOffEvent;
+			new_event.noteOff.channel = channel;
+			new_event.noteOff.pitch = midiData0;
+			new_event.noteOff.velocity = toNormalized (midiData1);
+			return std::move (new_event);
+		}
+		else if (status == kNoteOn) // note on
+		{
+			new_event.noteOn.noteId = -1;
+			new_event.type = Event::kNoteOnEvent;
+			new_event.noteOn.channel = channel;
+			new_event.noteOn.pitch = midiData0;
+			new_event.noteOn.velocity = toNormalized (midiData1);
+			return std::move (new_event);
+		}
+	}
+	//--- -----------------------------
+	else if (status == kPolyPressure)
+	{
+		new_event.type = Vst::Event::kPolyPressureEvent;
+		new_event.polyPressure.channel = channel;
+		new_event.polyPressure.pitch = midiData0;
+		new_event.polyPressure.pressure = toNormalized (midiData1);
+		return std::move (new_event);
+	}
+
+	return {};
+}
+
+//------------------------------------------------------------------------
+using ToParameterIdFunc = std::function<ParamID (int32, MidiData)>;
+OptionParamChange midiToParameter (MidiData status, MidiData channel, MidiData midiData1,
+                                   MidiData midiData2, const ToParameterIdFunc& toParamID)
+{
+	if (!toParamID)
+		return {};
+
+	ParameterChange paramChange;
+	if (status == kController) // controller
+	{
+		paramChange.first = toParamID (channel, midiData1);
+		if (paramChange.first != kNoParamId)
+		{
+			paramChange.second = (double)midiData2 * kMidiScaler;
+			return std::move (paramChange);
+		}
+	}
+	else if (status == kPitchBendStatus)
+	{
+		paramChange.first = toParamID (channel, Vst::kPitchBend);
+		if (paramChange.first != kNoParamId)
+		{
+			const double kPitchWheelScaler = 1. / (double)0x3FFF;
+
+			const int32 ctrl = (midiData1 & kDataMask) | (midiData2 & kDataMask) << 7;
+			paramChange.second = kPitchWheelScaler * (double)ctrl;
+			return std::move (paramChange);
+		};
+	}
+	else if (status == kAfterTouchStatus)
+	{
+		paramChange.first = toParamID (channel, Vst::kAfterTouch);
+		if (paramChange.first != kNoParamId)
+		{
+			paramChange.second = (ParamValue) (midiData1 & kDataMask) * kMidiScaler;
+			return std::move (paramChange);
+		};
+	}
+	else if (status == kProgramChangeStatus)
+	{
+		// TODO
+	}
+
+	return {};
+}
+//------------------------------------------------------------------------
+} // Vst
+} // Steinberg

src/Vst3PresetFile.cpp

@@ -0,0 +1,86 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "vst3/Vst3PresetFile.hpp"
+#include "public.sdk/source/vst/vstpresetfile.h"
+using namespace pipedal;
+using namespace Steinberg;
+using namespace Steinberg::Vst;
+
+
+namespace pipedal {
+
+class Vst3PresetFileImpl : public Vst3PresetFile {
+public:
+       virtual ~Vst3PresetFileImpl() { }
+
+
+        virtual void Load(const std::string&path);
+
+        virtual std::vector<Vst3PresetInfo> GetPresets();
+
+        virtual std::vector<uint8_t> GetPresetChunk(uint32_t index);
+private:
+    std::unique_ptr<PresetFile> presetFile;
+ 
+}; 
+
+
+void Vst3PresetFileImpl::Load(const std::string&path)
+{
+    OPtr<IBStream> stream = FileStream::open(path.c_str(),"r");
+    presetFile = std::make_unique<PresetFile>(stream);
+
+}
+
+std::vector<Vst3PresetInfo> Vst3PresetFileImpl::GetPresets()
+{
+    std::vector<Vst3PresetInfo> result;
+    auto count = presetFile->getEntryCount();
+    result.reserve(count);
+
+    for (int i = 0; i < count; ++i)
+    {
+        const PresetFile::Entry& entry = presetFile->at(i);
+    }
+
+    return result;
+}
+
+std::vector<uint8_t> Vst3PresetFileImpl::GetPresetChunk(uint32_t index)
+{
+    return std::vector<uint8_t>(); // STUB
+}
+
+
+
+std::unique_ptr<Vst3PresetFile> Vst3PresetFile::CreateInstance()
+{
+    return std::make_unique<Vst3PresetFileImpl>();
+}
+
+
+
+
+} // namespace pipedal

src/Vst3RtStream.cpp

@@ -0,0 +1,358 @@
+//-----------------------------------------------------------------------------
+// Project     : SDK Core
+//
+// Category    : Common Classes
+// Filename    : public.sdk/source/common/memorystream.cpp
+// Created by  : Steinberg, 03/2008
+// Description : IBStream Implementation for memory blocks
+//
+//-----------------------------------------------------------------------------
+// LICENSE
+// (c) 2022, Steinberg Media Technologies GmbH, All Rights Reserved
+//-----------------------------------------------------------------------------
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+// 
+//   * Redistributions of source code must retain the above copyright notice, 
+//     this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation 
+//     and/or other materials provided with the distribution.
+//   * Neither the name of the Steinberg Media Technologies nor the names of its
+//     contributors may be used to endorse or promote products derived from this 
+//     software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+// IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
+// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
+// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE  OF THIS SOFTWARE, EVEN IF ADVISED
+// OF THE POSSIBILITY OF SUCH DAMAGE.
+//-----------------------------------------------------------------------------
+
+#include "vst3/Vst3RtStream.hpp"
+#include "pluginterfaces/base/futils.h"
+#include <stdlib.h>
+
+namespace pipedal {
+
+//-----------------------------------------------------------------------------
+IMPLEMENT_FUNKNOWN_METHODS (RtStream, IBStream, IBStream::iid)
+static const TSize kMemGrowAmount = 4096;
+
+//-----------------------------------------------------------------------------
+
+//-----------------------------------------------------------------------------
+RtStream::RtStream(RtStreamPool*pool)
+: pool(pool)
+, memory (nullptr)
+, memorySize (0)
+, size (0)
+, cursor (0)
+, ownMemory (true)
+, allocationError (false)
+{
+	FUNKNOWN_CTOR
+}
+
+//-----------------------------------------------------------------------------
+RtStream::~RtStream () 
+{ 
+	if (ownMemory && memory)
+		::free (memory);
+
+	FUNKNOWN_DTOR 
+}
+
+//-----------------------------------------------------------------------------
+tresult PLUGIN_API RtStream::read (void* data, int32 numBytes, int32* numBytesRead)
+{
+	if (memory == nullptr)
+	{
+		if (allocationError)
+			return kOutOfMemory;
+		numBytes = 0;
+	}
+	else
+	{		
+		// Does read exceed size ?
+		if (cursor + numBytes > size)
+		{
+			int32 maxBytes = int32 (size - cursor);
+
+			// Has length become zero or negative ?
+			if (maxBytes <= 0) 
+			{
+				cursor = size;
+				numBytes = 0;
+			}
+			else
+				numBytes = maxBytes;
+		}
+		
+		if (numBytes)
+		{
+			memcpy (data, &memory[cursor], static_cast<size_t> (numBytes));
+			cursor += numBytes;
+		}
+	}
+
+	if (numBytesRead)
+		*numBytesRead = numBytes;
+
+	return kResultTrue;
+}
+
+//-----------------------------------------------------------------------------
+tresult PLUGIN_API RtStream::write (void* buffer, int32 numBytes, int32* numBytesWritten)
+{
+	if (allocationError)
+		return kOutOfMemory;
+	if (buffer == nullptr)
+		return kInvalidArgument;
+
+	// Does write exceed size ?
+	TSize requiredSize = cursor + numBytes;
+	if (requiredSize > size) 
+	{		
+		if (requiredSize > memorySize)
+			setSize (requiredSize);
+		else
+			size = requiredSize;
+	}
+	
+	// Copy data
+	if (memory && cursor >= 0 && numBytes > 0)
+	{
+		memcpy (&memory[cursor], buffer, static_cast<size_t> (numBytes));
+		// Update cursor
+		cursor += numBytes;
+	}
+	else
+		numBytes = 0;
+
+	if (numBytesWritten)
+		*numBytesWritten = numBytes;
+
+	return kResultTrue;
+}
+
+//-----------------------------------------------------------------------------
+tresult PLUGIN_API RtStream::seek (int64 pos, int32 mode, int64* result)
+{
+	switch (mode) 
+	{
+		case kIBSeekSet:
+			cursor = pos;
+			break;
+		case kIBSeekCur:
+			cursor = cursor + pos;
+			break;
+		case kIBSeekEnd:
+			cursor = size + pos;
+			break;
+	}
+
+	if (ownMemory == false)
+		if (cursor > memorySize)
+			cursor = memorySize;
+
+	if (result)
+		*result = cursor;
+
+	return kResultTrue;
+}
+
+//-----------------------------------------------------------------------------
+tresult PLUGIN_API RtStream::tell  (int64* pos)
+{
+	if (!pos)
+		return kInvalidArgument;
+
+	*pos = cursor;
+	return kResultTrue;
+}
+
+//------------------------------------------------------------------------
+TSize RtStream::getSize () const
+{
+	return size;
+}
+
+//------------------------------------------------------------------------
+void RtStream::setSize (TSize s)
+{
+	if (s <= 0)
+	{
+		if (ownMemory && memory)
+			free (memory);
+
+		memory = nullptr;
+		memorySize = 0;
+		size = 0;
+		cursor = 0;
+		return;
+	}
+
+	TSize newMemorySize = (((Max (memorySize, s) - 1) / kMemGrowAmount) + 1) * kMemGrowAmount;
+	if (newMemorySize == memorySize)
+	{
+		size = s;
+		return;
+	}
+
+	if (memory && ownMemory == false)
+	{
+		allocationError = true;
+		return;	
+	}
+
+	ownMemory = true;
+	char* newMemory = nullptr;
+
+	if (memory)
+	{
+		newMemory = (char*)realloc (memory, (size_t)newMemorySize);
+		if (newMemory == nullptr && newMemorySize > 0)
+		{
+			newMemory = (char*)malloc ((size_t)newMemorySize);
+			if (newMemory)
+			{
+				memcpy (newMemory, memory, (size_t)Min (newMemorySize, memorySize));           
+				free (memory);
+			}		
+		}
+	}
+	else
+		newMemory = (char*)malloc ((size_t)newMemorySize);
+
+	if (newMemory == nullptr)
+	{
+		if (newMemorySize > 0)
+			allocationError = true;
+
+		memory = nullptr;
+		memorySize = 0;
+		size = 0;
+		cursor = 0;
+	}
+	else
+	{
+		memory = newMemory;
+		memorySize = newMemorySize;
+		size = s;
+	}
+}
+
+//------------------------------------------------------------------------
+char* RtStream::getData () const
+{
+	return memory;
+}
+
+//------------------------------------------------------------------------
+char* RtStream::detachData ()
+{
+	if (ownMemory)
+	{
+		char* result = memory;
+		memory = nullptr;
+		memorySize = 0;
+		size = 0;
+		cursor = 0;
+		return result;
+	}
+	return nullptr;
+}
+
+//------------------------------------------------------------------------
+bool RtStream::truncate ()
+{
+	if (ownMemory == false)
+		return false;
+
+	if (memorySize == size)
+		return true;
+
+	memorySize = size;
+	
+	if (memorySize == 0)
+	{
+		if (memory)
+		{
+			free (memory);
+			memory = nullptr;
+		}
+	}
+	else
+	{
+		if (memory)
+		{
+			char* newMemory = (char*)realloc (memory, (size_t)memorySize);
+			if (newMemory)
+				memory = newMemory;
+		}
+	}
+	return true;
+}
+
+//------------------------------------------------------------------------
+bool RtStream::truncateToCursor ()
+{
+	size = cursor;
+	return truncate ();
+}
+
+} 
+
+// namespace
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "vst3/Vst3RtStream.hpp"
+
+using namespace Steinberg;
+using namespace pipedal;
+
+
+
+void RtStreamPool::ReleaseStreams()
+{
+    RtStream *freeStreamList;
+    {
+        freeStreamList = this->freeStreamList;
+        this->freeStreamList = nullptr;
+    }
+    while (freeStreamList)
+    {
+        RtStream *next = freeStreamList->next;
+
+        freeStreamList->release();
+        freeStreamList = next;
+    }
+}

src/Vst3SdkRepro.cpp

@@ -0,0 +1,49 @@
+#include <string>
+#include "public.sdk/source/vst/hosting/module.h"
+#include "public.sdk/source/vst/hosting/hostclasses.h"
+#include "public.sdk/source/vst/hosting/plugprovider.h"
+#include "pluginterfaces/vst/ivsteditcontroller.h"
+#include "pluginterfaces/vst/ivstaudioprocessor.h"
+#include "pluginterfaces/vst/ivstunits.h"
+#include "public.sdk/source/vst/utility/stringconvert.h"
+#include "public.sdk/source/vst/hosting/eventlist.h"
+#include "public.sdk/source/vst/hosting/parameterchanges.h"
+#include "public.sdk/source/vst/hosting/processdata.h"
+#include "pluginterfaces/vst/ivstaudioprocessor.h"
+#include "pluginterfaces/vst/ivstmidicontrollers.h"
+
+#include "public.sdk/samples/vst-hosting/audiohost/source/media/iparameterclient.h"
+#include "public.sdk/samples/vst-hosting/audiohost/source/media/imediaserver.h"
+
+using namespace std;
+using namespace VST3::Hosting;
+using namespace Steinberg;
+using namespace Steinberg::Vst;
+
+PluginFactory::ClassInfos GetVst3ClassInfos(const std::string& pluginPath)
+{
+    std::string error;
+    Module::Ptr module = Module::create(pluginPath.c_str(), error);
+
+    if (!module)
+    {
+        assert(false && "Vst3 load failed.");
+    }
+    const PluginFactory &factory = module->getFactory();
+
+    return factory.classInfos();
+}
+
+static std::string HomePath() { return getenv("HOME"); }
+
+void BugReportTest()
+{
+    auto _ = GetVst3ClassInfos(HomePath() + "/.vst3/adelay.vst3");
+    PluginFactory::ClassInfos classInfos = GetVst3ClassInfos(HomePath() + "/.vst3/mda-vst3.vst3");
+
+    // right size.
+    assert(classInfos.size() == 68); // succeeds
+
+    // wrong classInfo (from adelay.vst3)
+    assert(classInfos[0].name() == "mda Ambience"); // actual result "ADelay"
+}

src/Vst3test.cpp

@@ -0,0 +1,149 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "PiPedalHost.hpp"
+#include "vst3/Vst3Host.hpp"
+#include <iostream>
+
+using namespace pipedal;
+using namespace std;
+
+void EnumerateVst3Plugins()
+{
+    cout << "--- Enumeration Test --------" << endl;
+    Vst3Host::Ptr vst3Host = Vst3Host::CreateInstance();
+    vst3Host->RescanPlugins();
+
+
+    vst3Host->RefreshPlugins();
+}
+
+
+void CheckSync(IEffect*effect)
+{
+    Vst3Effect *vst3Effect = (Vst3Effect*)effect;
+
+    vst3Effect->CheckSync();
+}
+
+void TestPrograms(const Vst3PluginInfo &info, Vst3Effect *effect)
+{
+    for (size_t i = 0; i < info.pluginInfo_.port_groups().size(); ++i)
+    {
+        const auto &port_group = info.pluginInfo_.port_groups()[i];
+        if (port_group.program_list_id() != -1)
+        {
+            auto programList = effect->GetProgramList(port_group.program_list_id());
+            for (const auto& programGroup: programList)
+            {
+                cout <<"        " << port_group.program_list_id() << " " << programGroup.name  << " (" << programGroup.programs.size() <<  " programs)" << std::endl;
+                // for (const auto&program: programGroup.programs)
+                // {
+                //     cout << "             " << program.id << " " << program.name << endl;
+                // }
+            }
+        }
+    }    
+}
+
+void RunVsts()
+{
+    cout << "--- RunVsts ----------------" << endl;
+    Vst3Host::Ptr vst3Host = Vst3Host::CreateInstance();
+
+    cout << "Scanning" << endl;
+    const auto & plugins = vst3Host->RescanPlugins();
+
+    PiPedalHost host;
+
+    IHost *pHost = host.asIHost();
+    host.setSampleRate(44100);
+
+    for (const auto & info : plugins)
+    {
+
+        cout << "   Running " << info->pluginInfo_.name() << endl;
+        auto  plugin = vst3Host->CreatePlugin(0,info->pluginInfo_.uri(),pHost);
+
+        int nInputs = info->pluginInfo_.audio_inputs();
+        int nOutputs = info->pluginInfo_.audio_outputs();
+
+        plugin->Prepare(host.GetSampleRate(),pHost->GetMaxAudioBufferSize(),info->pluginInfo_.audio_inputs(), info->pluginInfo_.audio_outputs());
+
+        plugin->Activate();
+
+        std::vector<float*> inputs;
+        std::vector<float*> outputs;
+        inputs.resize(nInputs);
+        for (int i = 0; i < nInputs; ++i)
+        {
+             inputs[i] = new float[512];
+             plugin->SetAudioInputBuffer(i,inputs[i]);
+
+             for (int j = 0; j < 512; ++j)
+             {
+                inputs[i][j] = j / 512.0;
+             }
+        }
+        outputs.resize(nOutputs);
+        for (int i = 0; i < nOutputs; ++i) 
+        {
+            outputs[i] = new float[512];
+            plugin->SetAudioOutputBuffer(i,outputs[i]);
+        }
+
+        plugin->Run(512,nullptr);
+
+        for (int i = 0; i < info->pluginInfo_.controls().size(); ++i)
+        {
+            float v = plugin->GetControlValue(i);
+            plugin->SetControl(i,v);
+
+            plugin->Run(0,nullptr);
+
+            plugin->CheckSync();
+        }
+
+        TestPrograms(*info,plugin.get());
+
+        plugin->Deactivate();
+    }
+
+    
+
+}
+
+void BugReportTest();
+
+int main(int, char**)
+{
+    BugReportTest();
+    
+    RunVsts();
+
+    EnumerateVst3Plugins();
+
+
+    return 0;   
+}

src/asan_options.cpp

@@ -25,6 +25,7 @@ extern "C" {
             "detect_leaks=0"  // undesirable behavior on abnormal termination.
             ":alloc_dealloc_mismatch=0"  // Guitarix components trigger this. It's not actually a problem on GCC.
             ":new_delete_type_mismatch=0"  //GxTuner
+            ":detect_odr_violation=0"
              ":print_stacktrace=1"
              ":halt_on_error=1"
             ; 

src/main.cpp

@@ -27,7 +27,7 @@
 #include "AvahiService.hpp"
 
 #include "PiPedalSocket.hpp"
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 #include <boost/system/error_code.hpp>
 #include <filesystem>
 #include "PiPedalConfiguration.hpp"

src/vst3/Vst3Effect.hpp

@@ -0,0 +1,83 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include "PiPedalHost.hpp"
+#include <functional>
+#include "json.hpp"
+
+
+namespace pipedal {
+    struct Vst3PluginInfo {
+    public:
+
+        std::string filePath_;
+        std::string version_;
+        std::string uid_;
+
+        Lv2PluginUiInfo pluginInfo_;
+
+        DECLARE_JSON_MAP(Vst3PluginInfo);
+
+    };
+
+    struct  Vst3ProgramListEntry {
+        int32_t id;
+        std::string name;
+    };
+
+    struct Vst3ProgramList {
+        std::string name;
+
+        std::vector<Vst3ProgramListEntry> programs;
+        
+    };
+
+    class Vst3Effect: public IEffect {
+    public:
+        using Ptr = std::unique_ptr<Vst3Effect>;
+
+        virtual void Prepare(int32_t sampleRate, size_t maxBufferSize,int inputChannels, int outputChannels) = 0;
+
+        virtual void Activate() = 0;
+        virtual void Deactivate() = 0;
+        virtual void Unprepare() = 0;
+        virtual void CheckSync() = 0; // throw if audioProcessor and controller are not sync (test only)
+
+        virtual bool SupportsState() const = 0;
+        virtual bool GetState(std::vector<uint8_t> *state) = 0;
+
+		virtual void SetState(const std::vector<uint8_t> state) = 0;
+
+        using ControlChangedHandler = std::function<void(int control,float value)>;
+        virtual void SetControlChangedHandler(const ControlChangedHandler& handler) = 0;
+        virtual void RemoveControlChangedHandler() = 0;
+
+        virtual std::vector<Vst3ProgramList> GetProgramList(int32_t programListId) = 0;
+    public:
+        static std::unique_ptr<Vst3Effect> CreateInstance(uint64_t instanceId,const Vst3PluginInfo& info, IHost *pHost);
+    };
+
+}

src/vst3/Vst3EffectImpl.hpp

@@ -0,0 +1,286 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Robin E. R. Davies
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "Vst3Effect.hpp"
+#include <vector>
+
+#include "RtInversionGuard.hpp"
+#include "Vst3RtStream.hpp"
+
+#pragma once
+
+namespace pipedal
+{
+	using namespace std;
+	using namespace pipedal;
+	using namespace VST3::Hosting;
+	using namespace Steinberg;
+	using namespace Steinberg::Vst;
+
+	enum
+	{
+		kMaxMidiMappingBusses = 4,
+		kMaxMidiChannels = 16
+	};
+	using Controllers = std::vector<int32>;
+	using Channels = std::array<Controllers, kMaxMidiChannels>;
+	using Busses = std::array<Channels, kMaxMidiMappingBusses>;
+	using MidiCCMapping = Busses;
+
+	class Vst3EffectImpl : public Vst3Effect,
+						   public IAudioClient,
+						   public IMidiClient
+	{
+	public:
+		//--------------------------------------------------------------------
+		using Name = std::string;
+
+		Vst3EffectImpl();
+		virtual ~Vst3EffectImpl();
+		void Load(uint64_t instanceId, const Vst3PluginInfo &info, IHost *pHost);
+
+		// IEffect
+		virtual bool IsVst3() const { return true; }
+		virtual uint64_t GetInstanceId() const { return instanceId; }
+		virtual int GetControlIndex(const std::string &symbol) const
+		{
+			for (size_t i = 0; i < info.pluginInfo_.controls().size(); ++i)
+			{
+				if (info.pluginInfo_.controls()[i].symbol() == symbol)
+				{
+					return (int)i;
+				}
+			}
+			return -1;
+		}
+
+		bool SupportsState() const { return supportsState; }
+
+		bool GetState(std::vector<uint8_t> *state);
+
+		void SetState(const std::vector<uint8_t> state);
+
+		virtual void CheckSync();
+
+		//- PiPedalHost Interfaces.
+		virtual void SetControl(int index, float value);
+		virtual float GetControlValue(int index) const
+		{
+			return this->parameterValues[index];
+		}
+
+        virtual std::vector<Vst3ProgramList> GetProgramList(int32_t programListId);
+
+		int bypassControl = -1;
+		bool bypassEnable = false;
+
+		virtual void SetBypass(bool enable)
+		{
+			if (bypassControl != -1)
+			{
+				SetControl(bypassControl, enable ? 1 : 0);
+			}
+			else
+			{
+				bypassEnable = enable;
+			}
+		}
+
+		virtual void Activate();
+		virtual void Deactivate();
+
+		virtual float GetOutputControlValue(int controlIndex) const
+		{
+			return this->parameterValues[controlIndex];
+		}
+
+		virtual int GetNumberOfInputAudioPorts() const
+		{
+			return info.pluginInfo_.audio_inputs();
+		}
+		virtual int GetNumberOfOutputAudioPorts() const
+		{
+			return info.pluginInfo_.audio_outputs();
+		}
+		virtual float *GetAudioInputBuffer(int index) const { return buffers.inputs[index]; }
+		virtual float *GetAudioOutputBuffer(int index) const { return buffers.outputs[index]; }
+		virtual void ResetAtomBuffers() {}
+		virtual void RequestParameter(LV2_URID uridUri) {}					// no vst equivalent.
+		virtual void GatherParameter(RealtimeParameterRequest *pRequest) {} // no vst equivalent.
+
+		virtual void SetAudioInputBuffer(int index, float *buffer)
+		{
+			buffers.inputs[index] = buffer;
+		}
+		virtual void SetAudioOutputBuffer(int index, float *buffer)
+		{
+			buffers.outputs[index] = buffer;
+		}
+
+
+		virtual void Run(uint32_t samples, RealtimeRingBufferWriter *realtimeRingBufferWriter)
+		{
+			process(buffers, samples);
+			SendControlChanges(realtimeRingBufferWriter);
+		}
+
+		// Vst3Effect interfaces.
+
+		virtual void Prepare(int32_t sampleRate, size_t maxBufferSize, int inputChannels, int outputChannels);
+		virtual void Unprepare();
+
+		// IAudioClient
+		bool process(Buffers &buffers, int64_t continousFrames) override;
+		bool setSamplerate(SampleRate value) override;
+		bool setBlockSize(int32 value) override;
+		IAudioClient::IOSetup getIOSetup() const override;
+
+		// IMidiClient
+		bool onEvent(const Event &event, int32_t port) override;
+		IMidiClient::IOSetup getMidiIOSetup() const override;
+
+		// IParameterClient
+
+
+		//--------------------------------------------------------------------
+	private:
+		bool supportsState = false;
+		IHost *pHost;
+		Module::Ptr module;
+		IPtr<IMidiMapping> midiMapping;
+		IPtr<PlugProvider> plugProvider;
+
+		RtStreamPool streamPool;
+
+		void SendControlChanges(RealtimeRingBufferWriter *realtimeRingBufferWriter);
+		//--------------------------------------------------------------------
+	private:
+		std::mutex parameterMutex;
+		Buffers buffers;
+		std::vector<ParamID> lv2ToVstParam;
+		std::vector<float> parameterValues;
+
+		// void createLocalMediaServer(const Name &name);
+		uint64_t instanceId;
+		Vst3PluginInfo info;
+		void terminate();
+		void initProcessData();
+		void updateBusBuffers(Buffers &buffers, HostProcessData &processData);
+		void preprocess(Buffers &buffers, int64_t continousFrames);
+		void postprocess(Buffers &buffers);
+		bool isPortInRange(int32 port, int32 channel) const;
+		bool processVstEvent(const IMidiClient::Event &event, int32 port);
+		bool processParamChange(const IMidiClient::Event &event, int32 port);
+
+		SampleRate sampleRate = 0;
+		int32 blockSize = 0;
+		HostProcessData processData;
+		ProcessContext processContext;
+		EventList eventList;
+		ParameterChanges inputParameterChanges;
+		ParameterChanges outputParameterChanges;
+		IComponent *component = nullptr;
+		IEditController *controller = nullptr;
+		FUnknownPtr<IAudioProcessor> processor;
+
+		ParameterChangeTransfer paramTransferrer;
+
+		MidiCCMapping midiCCMapping;
+		// IMediaServerPtr mediaServer;
+		bool isProcessing = false;
+
+		Name name;
+
+	private:
+		ssize_t ParamIdToLv2Id(ParamID id) const;
+
+		class ComponentHandler : public IComponentHandler
+		{
+		private:
+			Vst3EffectImpl *pEffect = nullptr;
+		public:
+			ComponentHandler() { }
+
+			void setEffect(Vst3EffectImpl*effect)
+			{
+				pEffect = effect;
+			}
+			tresult PLUGIN_API beginEdit(ParamID id) override
+			{
+				return pEffect->beginEdit(id);
+			}
+			tresult PLUGIN_API performEdit(ParamID id, ParamValue valueNormalized) override
+			{
+				return pEffect->performEdit(id, valueNormalized);
+			}
+			tresult PLUGIN_API endEdit(ParamID id) override
+			{
+				return pEffect->endEdit(id);
+			}
+			tresult PLUGIN_API restartComponent(int32 flags) override
+			{
+				return pEffect->restartComponent(flags);
+			}
+
+		private:
+			tresult PLUGIN_API queryInterface(const TUID _iid, void ** obj) override
+			{
+				if (_iid == IComponentHandler_iid)
+				{
+					addRef();
+					*((FUnknown**)obj) = this;
+					return kResultOk;
+				}
+
+				return kNoInterface;
+			}
+			uint32 PLUGIN_API addRef() override { return 1000; }
+			uint32 PLUGIN_API release() override { return 1000; }
+		};
+
+		ComponentHandler componentHandler;
+		void transferControllerStateToComponent();
+		void refreshControlValues();
+
+		virtual tresult beginEdit(ParamID id);
+		virtual tresult performEdit(ParamID id, ParamValue valueNormalized);
+		virtual tresult endEdit(ParamID id);
+		virtual tresult restartComponent(int32 flags);
+
+	private:
+		ControlChangedHandler controlChangedHandler = [] (int control,float value) {};
+		void fireControlChanged(int control, float  normalizedValue);
+		
+	public:
+		virtual void SetControlChangedHandler(const ControlChangedHandler& handler) 
+		{
+			controlChangedHandler = handler;
+		}
+        virtual void RemoveControlChangedHandler() {
+			controlChangedHandler = [] (int,float){};
+		}
+
+	};
+
+}

src/vst3/Vst3Host.hpp

@@ -0,0 +1,70 @@
+/*
+ /* MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+#include <vector> 
+#include <stdint.h>
+#include <string>
+#include <exception>
+#include <stdexcept>
+
+#include "public.sdk/source/vst/utility/uid.h"
+
+#include "vst3/Vst3Effect.hpp"
+#include "PedalBoard.hpp"
+
+
+ namespace pipedal {
+
+
+    class Vst3Exception: public std::logic_error {
+    public:
+        Vst3Exception(const std::string&error)
+        :logic_error(error)
+        {
+        }
+    };
+
+    class Vst3Host {
+    
+    public:
+        using Ptr = std::unique_ptr<Vst3Host>;
+		using PluginList = std::vector<std::unique_ptr<Vst3PluginInfo>>;
+
+        virtual ~Vst3Host() {}
+        virtual const PluginList &RescanPlugins() = 0;
+        virtual const PluginList &RefreshPlugins() = 0;
+        virtual const PluginList &getPluginList() = 0;
+
+
+        virtual std::unique_ptr<Vst3Effect> CreatePlugin(long instanceId,const std::string&url, IHost*pHost) = 0;
+        virtual std::unique_ptr<Vst3Effect> CreatePlugin(PedalBoardItem&pedalBoardItem, IHost*pHost) = 0;
+
+
+        static Ptr CreateInstance(const std::string &cacheFilePath = "");
+
+    };
+
+
+ };

src/vst3/Vst3PresetFile.hpp

@@ -0,0 +1,53 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include <cstddef>
+#include <string>
+#include <vector>
+#include <memory>
+
+namespace pipedal {
+    struct  Vst3PresetInfo {
+        uint32_t index;
+        std::string name;
+    };
+    class Vst3PresetFile {
+    protected:
+        Vst3PresetFile() { }
+    public:
+        virtual ~Vst3PresetFile() { }
+
+
+        virtual void Load(const std::string&path) = 0;
+
+        virtual std::vector<Vst3PresetInfo> GetPresets() = 0;
+
+        virtual std::vector<uint8_t> GetPresetChunk(uint32_t index) = 0;
+
+        std::unique_ptr<Vst3PresetFile> CreateInstance();
+    };
+
+}

src/vst3/Vst3RtStream.hpp

@@ -0,0 +1,109 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Robin E. R. Davies
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include "public.sdk/source/common/memorystream.h"
+#include <mutex>
+#include "Vst3RtStream.hpp"
+
+namespace pipedal
+{
+    using namespace Steinberg;
+
+    class IRtStream : public IBStream
+    {
+    public:
+        virtual void QueueForRelease() = 0;
+    };
+
+    class RtStreamPool;
+
+    class RtStream : public IRtStream
+    {
+        friend class RtStreamPool;
+
+        virtual void PLUGIN_API QueueForRelease();
+        RtStream(RtStreamPool *pool);
+
+    public:
+        virtual ~RtStream();
+        //---IBStream---------------------------------------
+        tresult PLUGIN_API read(void *buffer, int32 numBytes, int32 *numBytesRead) SMTG_OVERRIDE;
+        tresult PLUGIN_API write(void *buffer, int32 numBytes, int32 *numBytesWritten) SMTG_OVERRIDE;
+        tresult PLUGIN_API seek(int64 pos, int32 mode, int64 *result) SMTG_OVERRIDE;
+        tresult PLUGIN_API tell(int64 *pos) SMTG_OVERRIDE;
+
+        TSize getSize() const;    ///< returns the current memory size
+        void setSize(TSize size); ///< set the memory size, a realloc will occur if memory already used
+        char *getData() const;    ///< returns the memory pointer
+        char *detachData();       ///< returns the memory pointer and give up ownership
+        bool truncate();          ///< realloc to the current use memory size if needed
+        bool truncateToCursor();  ///< truncate memory at current cursor position
+
+        //------------------------------------------------------------------------
+        DECLARE_FUNKNOWN_METHODS
+    protected:
+        RtStreamPool *pool = nullptr;
+        RtStream *next = nullptr;
+        char *memory;         // memory block
+        TSize memorySize;     // size of the memory block
+        TSize size;           // size of the stream
+        int64 cursor;         // stream pointer
+        bool ownMemory;       // stream has allocated memory itself
+        bool allocationError; // stream invalid
+    };
+
+    class RtStreamPool
+    {
+    public:
+        ~RtStreamPool()
+        {
+            ReleaseStreams();
+        }
+        IRtStream *AllocateBStream()
+        {
+            ReleaseStreams();
+            return new RtStream(this);
+        }
+        void ReleaseStreams();
+
+    private:
+        friend class RtStream;
+
+        RtStream *freeStreamList = nullptr;
+
+        void QueueForRelease(RtStream *pStream)
+        {
+            pStream->next = freeStreamList;
+            freeStreamList = pStream;
+        }
+    };
+
+  
+    inline void RtStream::QueueForRelease()
+    {
+        pool->QueueForRelease(this);
+    }
+};

test/Lv2Test.cpp

@@ -19,7 +19,7 @@
 #include "pch.h"
 #include "catch.hpp"
 #include <string>
-#include "Lv2Host.hpp"
+#include "PiPedalHost.hpp"
 
 using namespace piddle;