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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <atomic>
#include <memory>
#include <span>
#include <string>
#include "audio_core/common/common.h"
#include "audio_core/device/audio_buffers.h"
#include "audio_core/device/device_session.h"
#include "core/hle/service/audio/errors.h"
namespace Core {
class System;
}
namespace Kernel {
class KEvent;
class KProcess;
} // namespace Kernel
namespace AudioCore::AudioOut {
constexpr SessionTypes SessionType = SessionTypes::AudioOut;
struct AudioOutParameter {
/* 0x0 */ s32_le sample_rate;
/* 0x4 */ u16_le channel_count;
/* 0x6 */ u16_le reserved;
};
static_assert(sizeof(AudioOutParameter) == 0x8, "AudioOutParameter is an invalid size");
struct AudioOutParameterInternal {
/* 0x0 */ u32_le sample_rate;
/* 0x4 */ u32_le channel_count;
/* 0x8 */ u32_le sample_format;
/* 0xC */ u32_le state;
};
static_assert(sizeof(AudioOutParameterInternal) == 0x10,
"AudioOutParameterInternal is an invalid size");
struct AudioOutBuffer {
/* 0x00 */ AudioOutBuffer* next;
/* 0x08 */ VAddr samples;
/* 0x10 */ u64 capacity;
/* 0x18 */ u64 size;
/* 0x20 */ u64 offset;
};
static_assert(sizeof(AudioOutBuffer) == 0x28, "AudioOutBuffer is an invalid size");
enum class State {
Started,
Stopped,
};
/**
* Controls and drives audio output.
*/
class System {
public:
explicit System(Core::System& system, Kernel::KEvent* event, size_t session_id);
~System();
/**
* Get the default audio output device name.
*
* @return The default audio output device name.
*/
std::string_view GetDefaultOutputDeviceName() const;
/**
* Is the given initialize config valid?
*
* @param device_name - The name of the requested output device.
* @param in_params - Input parameters, see AudioOutParameter.
* @return Result code.
*/
Result IsConfigValid(std::string_view device_name, const AudioOutParameter& in_params) const;
/**
* Initialize this system.
*
* @param device_name - The name of the requested output device.
* @param in_params - Input parameters, see AudioOutParameter.
* @param handle - Process handle.
* @param applet_resource_user_id - Unused.
* @return Result code.
*/
Result Initialize(std::string device_name, const AudioOutParameter& in_params,
Kernel::KProcess* handle, u64 applet_resource_user_id);
/**
* Start this system.
*
* @return Result code.
*/
Result Start();
/**
* Stop this system.
*
* @return Result code.
*/
Result Stop();
/**
* Finalize this system.
*/
void Finalize();
/**
* Start this system's device session.
*/
void StartSession();
/**
* Get this system's id.
*/
size_t GetSessionId() const;
/**
* Append a new buffer to the device.
*
* @param buffer - New buffer to append.
* @param tag - Unique tag of the buffer.
* @return True if the buffer was appended, otherwise false.
*/
bool AppendBuffer(const AudioOutBuffer& buffer, u64 tag);
/**
* Register all appended buffers.
*/
void RegisterBuffers();
/**
* Release all registered buffers.
*/
void ReleaseBuffers();
/**
* Get all released buffers.
*
* @param tags - Container to be filled with the released buffers' tags.
* @return The number of buffers released.
*/
u32 GetReleasedBuffers(std::span<u64> tags);
/**
* Flush all appended and registered buffers.
*
* @return True if buffers were successfully flushed, otherwise false.
*/
bool FlushAudioOutBuffers();
/**
* Get this system's current channel count.
*
* @return The channel count.
*/
u16 GetChannelCount() const;
/**
* Get this system's current sample rate.
*
* @return The sample rate.
*/
u32 GetSampleRate() const;
/**
* Get this system's current sample format.
*
* @return The sample format.
*/
SampleFormat GetSampleFormat() const;
/**
* Get this system's current state.
*
* @return The current state.
*/
State GetState();
/**
* Get this system's name.
*
* @return The system's name.
*/
std::string GetName() const;
/**
* Get this system's current volume.
*
* @return The system's current volume.
*/
f32 GetVolume() const;
/**
* Set this system's current volume.
*
* @param volume The new volume.
*/
void SetVolume(f32 volume);
/**
* Does the system contain this buffer?
*
* @param tag - Unique tag to search for.
* @return True if the buffer is in the system, otherwise false.
*/
bool ContainsAudioBuffer(u64 tag) const;
/**
* Get the maximum number of usable buffers (default 32).
*
* @return The number of buffers.
*/
u32 GetBufferCount() const;
/**
* Get the total number of samples played by this system.
*
* @return The number of samples.
*/
u64 GetPlayedSampleCount() const;
private:
/// Core system
Core::System& system;
/// Process handle
Kernel::KProcess* handle{};
/// (Unused)
u64 applet_resource_user_id{};
/// Buffer event, signalled when a buffer is ready
Kernel::KEvent* buffer_event;
/// Session id of this system
size_t session_id{};
/// Device session for this system
std::unique_ptr<DeviceSession> session;
/// Audio buffers in use by this system
AudioBuffers<BufferCount> buffers{BufferCount};
/// Sample rate of this system
u32 sample_rate{};
/// Sample format of this system
SampleFormat sample_format{SampleFormat::PcmInt16};
/// Channel count of this system
u16 channel_count{};
/// State of this system
std::atomic<State> state{State::Stopped};
/// Name of this system
std::string name{};
/// Volume of this system
f32 volume{1.0f};
};
} // namespace AudioCore::AudioOut
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