Pipewire aux in tests.

src/PipewireInputStream.hpp

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+/*
+ * MIT License
+ *
+ * Copyright (c) 2025 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 <memory>
+#include <string>
+#include <functional>
+
+namespace pipedal
+{
+    class PipeWireInputStream
+    {
+    protected:
+        PipeWireInputStream() {}
+
+    public:
+        virtual ~PipeWireInputStream() {}
+
+        using self = PipeWireInputStream;
+        using ptr = std::shared_ptr<self>;
+
+        using Callback = std::function<void(const float *data, size_t size)>;
+        static ptr Create(const std::string &streamName, int sampleRate, int channels);
+
+        virtual void Activate(Callback &&callback) = 0;
+        virtual void Deactivate() = 0;
+        virtual bool IsActive() const = 0;
+    };
+}