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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <memory>
#include <string>
#include "audio_core/sink/sink_stream.h"
#include "common/common_types.h"
namespace Common {
class Event;
}
namespace Core {
class System;
}
namespace AudioCore::Sink {
constexpr char auto_device_name[] = "auto";
/**
* This class is an interface for an audio sink, holds multiple output streams and is responsible
* for sinking samples to hardware. Used by Audio Render, Audio In and Audio Out.
*/
class Sink {
public:
virtual ~Sink() = default;
/**
* Close a given stream.
*
* @param stream - The stream to close.
*/
virtual void CloseStream(SinkStream* stream) = 0;
/**
* Close all streams.
*/
virtual void CloseStreams() = 0;
/**
* Pause all streams.
*/
virtual void PauseStreams() = 0;
/**
* Unpause all streams.
*/
virtual void UnpauseStreams() = 0;
/**
* Create a new sink stream, kept within this sink, with a pointer returned for use.
* Do not free the returned pointer. When done with the stream, call CloseStream on the sink.
*
* @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.
*
* @return A pointer to the created SinkStream
*/
virtual SinkStream* AcquireSinkStream(Core::System& system, u32 system_channels,
const std::string& name, StreamType type) = 0;
/**
* Get the number of channels the hardware device supports.
* Either 2 or 6.
*
* @return Number of device channels.
*/
u32 GetDeviceChannels() const {
return device_channels;
}
/**
* Get the device volume. Set from calls to the IAudioDevice service.
*
* @return Volume of the device.
*/
virtual f32 GetDeviceVolume() const = 0;
/**
* Set the device volume. Set from calls to the IAudioDevice service.
*
* @param volume - New volume of the device.
*/
virtual void SetDeviceVolume(f32 volume) = 0;
/**
* Set the system volume. Comes from the audio system using this stream.
*
* @param volume - New volume of the system.
*/
virtual void SetSystemVolume(f32 volume) = 0;
protected:
/// Number of device channels supported by the hardware
u32 device_channels{2};
};
using SinkPtr = std::unique_ptr<Sink>;
} // namespace AudioCore::Sink
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