0.9.11-rc-2

Switch from JACK to ALSA audio.

src/AudioDriver.hpp

@@ -0,0 +1,89 @@
+/*
+ * 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 "JackConfiguration.hpp"
+#include <functional>
+
+
+
+
+namespace pipedal {
+
+
+    using ProcessCallback = std::function<void (size_t)>;
+
+
+
+    struct MidiEvent
+    {
+        /* BINARY COMPATIBLE WITH jack_midi_event_t;! (in case we ever want to resurrect Jack support) */
+        uint32_t    time;   /**< Sample index at which event is valid */
+        size_t            size;   /**< Number of bytes of data in \a buffer */
+        uint8_t *buffer; /**< Raw MIDI data */
+
+    };
+
+
+    class AudioDriverHost {
+    public:
+        virtual void OnProcess(size_t nFrames) = 0;
+        virtual void OnUnderrun() = 0;
+        virtual void OnAudioStopped() = 0;
+
+
+    };
+    class AudioDriver {
+    public:
+
+        virtual ~AudioDriver() { }
+
+        virtual float CpuUse() = 0;
+        virtual float CpuOverhead() = 0;
+
+        virtual uint32_t GetSampleRate() = 0;
+
+        virtual size_t MidiInputBufferCount() const = 0;
+        virtual void*GetMidiInputBuffer(size_t channel, size_t nFrames) = 0;
+        virtual size_t GetMidiInputEventCount(void*buffer) = 0;
+        virtual bool GetMidiInputEvent(MidiEvent*event, void*portBuf, size_t nFrame) = 0;
+
+        virtual void FillMidiBuffers() = 0;
+
+        virtual size_t InputBufferCount() const = 0;
+        virtual float*GetInputBuffer(size_t channel, size_t nFrames) = 0;
+
+
+        virtual size_t OutputBufferCount() const = 0;
+        virtual float*GetOutputBuffer(size_t channel, size_t nFrames) = 0;
+
+        virtual void Open(const JackServerSettings & jackServerSettings,const JackChannelSelection &channelSelection) = 0;
+
+        virtual void Activate() = 0;
+        virtual void Deactivate() = 0;
+        virtual void Close() = 0;
+
+    };
+
+};