Project Andio

src/audio_core/sink/cubeb_sink.h

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+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include <cubeb/cubeb.h>
+
+#include "audio_core/sink/sink.h"
+
+namespace Core {
+class System;
+}
+
+namespace AudioCore::Sink {
+class SinkStream;
+
+/**
+ * Cubeb backend sink, holds multiple output streams and is responsible for sinking samples to
+ * hardware. Used by Audio Render, Audio In and Audio Out.
+ */
+class CubebSink final : public Sink {
+public:
+    explicit CubebSink(std::string_view device_id);
+    ~CubebSink() override;
+
+    /**
+     * Create a new sink stream.
+     *
+     * @param system          - Core system.
+     * @param system_channels - Number of channels the audio system expects.
+     *                          May differ from the device's channel count.
+     * @param name            - Name of this stream.
+     * @param type            - Type of this stream, render/in/out.
+     * @param event           - Audio render only, a signal used to prevent the renderer running too
+     *                          fast.
+     * @return A pointer to the created SinkStream
+     */
+    SinkStream* AcquireSinkStream(Core::System& system, u32 system_channels,
+                                  const std::string& name, StreamType type) override;
+
+    /**
+     * Close a given stream.
+     *
+     * @param stream - The stream to close.
+     */
+    void CloseStream(const SinkStream* stream) override;
+
+    /**
+     * Close all streams.
+     */
+    void CloseStreams() override;
+
+    /**
+     * Pause all streams.
+     */
+    void PauseStreams() override;
+
+    /**
+     * Unpause all streams.
+     */
+    void UnpauseStreams() override;
+
+    /**
+     * Get the device volume. Set from calls to the IAudioDevice service.
+     *
+     * @return Volume of the device.
+     */
+    f32 GetDeviceVolume() const override;
+
+    /**
+     * Set the device volume. Set from calls to the IAudioDevice service.
+     *
+     * @param volume - New volume of the device.
+     */
+    void SetDeviceVolume(f32 volume) override;
+
+    /**
+     * Set the system volume. Comes from the audio system using this stream.
+     *
+     * @param volume - New volume of the system.
+     */
+    void SetSystemVolume(f32 volume) override;
+
+private:
+    /// Backend Cubeb context
+    cubeb* ctx{};
+    /// Cubeb id of the actual hardware output device
+    cubeb_devid output_device{};
+    /// Cubeb id of the actual hardware input device
+    cubeb_devid input_device{};
+    /// Vector of streams managed by this sink
+    std::vector<SinkStreamPtr> sink_streams{};
+
+#ifdef _WIN32
+    /// Cubeb required COM to be initialized multi-threaded on Windows
+    u32 com_init_result = 0;
+#endif
+};
+
+/**
+ * Get a list of conencted devices from Cubeb.
+ *
+ * @param capture - Return input (capture) devices if true, otherwise output devices.
+ */
+std::vector<std::string> ListCubebSinkDevices(bool capture);
+
+} // namespace AudioCore::Sink