SDL2 audio backend implementation. More...

#include <audio_backend.h>

Inheritance diagram for yaze::emu::audio::SDL2AudioBackend:

Collaboration diagram for yaze::emu::audio::SDL2AudioBackend:

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Public Member Functions
	SDL2AudioBackend ()=default

	~SDL2AudioBackend () override

bool	Initialize (const AudioConfig &config) override

void	Shutdown () override

void	Play () override

void	Pause () override

void	Stop () override

void	Clear () override

bool	QueueSamples (const int16_t *samples, int num_samples) override

bool	QueueSamples (const float *samples, int num_samples) override

bool	QueueSamplesNative (const int16_t *samples, int frames_per_channel, int channels, int native_rate) override

AudioStatus	GetStatus () const override

bool	IsInitialized () const override

AudioConfig	GetConfig () const override

void	SetVolume (float volume) override

float	GetVolume () const override

void	SetAudioStreamResampling (bool enable, int native_rate, int channels) override

bool	SupportsAudioStream () const override

bool	IsAudioStreamEnabled () const override

std::string	GetBackendName () const override

Public Member Functions inherited from yaze::emu::audio::IAudioBackend
virtual	~IAudioBackend ()=default

Private Attributes
uint32_t	device_id_ = 0

AudioConfig	config_

bool	initialized_ = false

float	volume_ = 1.0f

int	call_count_ = 0

SDL_AudioFormat	device_format_ = AUDIO_S16

int	device_channels_ = 2

int	device_freq_ = 48000

bool	audio_stream_enabled_ = false

int	stream_native_rate_ = 0

SDL_AudioStream *	audio_stream_ = nullptr

std::vector< int16_t >	stream_buffer_

Detailed Description

SDL2 audio backend implementation.

Definition at line 95 of file audio_backend.h.

Constructor & Destructor Documentation

◆ SDL2AudioBackend()

yaze::emu::audio::SDL2AudioBackend::SDL2AudioBackend ( )

default

◆ ~SDL2AudioBackend()

yaze::emu::audio::SDL2AudioBackend::~SDL2AudioBackend ( )

override

Definition at line 78 of file audio_backend.cc.

References Shutdown().

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Member Function Documentation

◆ Initialize()

bool yaze::emu::audio::SDL2AudioBackend::Initialize ( const AudioConfig & config )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 82 of file audio_backend.cc.

References audio_stream_, audio_stream_enabled_, yaze::emu::audio::AudioConfig::buffer_frames, yaze::emu::audio::AudioConfig::channels, config_, device_channels_, device_format_, device_freq_, device_id_, yaze::emu::audio::AudioConfig::format, initialized_, yaze::emu::audio::INT16, LOG_ERROR, LOG_INFO, LOG_WARN, yaze::emu::audio::AudioConfig::sample_rate, Shutdown(), stream_buffer_, and stream_native_rate_.

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◆ Shutdown()

void yaze::emu::audio::SDL2AudioBackend::Shutdown ( )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 156 of file audio_backend.cc.

References audio_stream_, audio_stream_enabled_, device_id_, initialized_, LOG_INFO, stream_buffer_, and stream_native_rate_.

Referenced by Initialize(), and ~SDL2AudioBackend().

◆ Play()

void yaze::emu::audio::SDL2AudioBackend::Play ( )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 178 of file audio_backend.cc.

References device_id_, initialized_, LOG_INFO, and LOG_WARN.

◆ Pause()

void yaze::emu::audio::SDL2AudioBackend::Pause ( )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 190 of file audio_backend.cc.

References device_id_, and initialized_.

◆ Stop()

void yaze::emu::audio::SDL2AudioBackend::Stop ( )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 196 of file audio_backend.cc.

References Clear(), device_id_, and initialized_.

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◆ Clear()

void yaze::emu::audio::SDL2AudioBackend::Clear ( )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 203 of file audio_backend.cc.

References audio_stream_, device_id_, initialized_, and LOG_INFO.

Referenced by Stop().

◆ QueueSamples() [1/2]

bool yaze::emu::audio::SDL2AudioBackend::QueueSamples	(	const int16_t *	samples,
		int	num_samples )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 215 of file audio_backend.cc.

References device_id_, initialized_, LOG_DEBUG, LOG_ERROR, and volume_.

Referenced by QueueSamples(), and QueueSamplesNative().

◆ QueueSamples() [2/2]

bool yaze::emu::audio::SDL2AudioBackend::QueueSamples	(	const float *	samples,
		int	num_samples )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 272 of file audio_backend.cc.

References initialized_, QueueSamples(), and volume_.

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◆ QueueSamplesNative()

bool yaze::emu::audio::SDL2AudioBackend::QueueSamplesNative	(	const int16_t *	samples,
		int	frames_per_channel,
		int	channels,
		int	native_rate )

overridevirtual

Reimplemented from yaze::emu::audio::IAudioBackend.

Definition at line 286 of file audio_backend.cc.

References audio_stream_, audio_stream_enabled_, call_count_, yaze::emu::audio::AudioConfig::channels, config_, device_freq_, device_id_, initialized_, LOG_DEBUG, LOG_ERROR, LOG_WARN, QueueSamples(), SetAudioStreamResampling(), stream_buffer_, and stream_native_rate_.

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◆ GetStatus()

AudioStatus yaze::emu::audio::SDL2AudioBackend::GetStatus ( ) const

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 382 of file audio_backend.cc.

References yaze::emu::audio::AudioConfig::channels, config_, device_id_, yaze::emu::audio::AudioConfig::format, yaze::emu::audio::AudioStatus::has_underrun, initialized_, yaze::emu::audio::INT16, yaze::emu::audio::AudioStatus::is_playing, LOG_WARN, yaze::emu::audio::AudioStatus::queued_bytes, and yaze::emu::audio::AudioStatus::queued_frames.

◆ IsInitialized()

bool yaze::emu::audio::SDL2AudioBackend::IsInitialized ( ) const

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 410 of file audio_backend.cc.

References initialized_.

◆ GetConfig()

AudioConfig yaze::emu::audio::SDL2AudioBackend::GetConfig ( ) const

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 414 of file audio_backend.cc.

References config_.

◆ SetVolume()

void yaze::emu::audio::SDL2AudioBackend::SetVolume ( float volume )

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 467 of file audio_backend.cc.

References volume_.

◆ GetVolume()

float yaze::emu::audio::SDL2AudioBackend::GetVolume ( ) const

overridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 471 of file audio_backend.cc.

References volume_.

◆ SetAudioStreamResampling()

void yaze::emu::audio::SDL2AudioBackend::SetAudioStreamResampling	(	bool	enable,
		int	native_rate,
		int	channels )

overridevirtual

Reimplemented from yaze::emu::audio::IAudioBackend.

Definition at line 418 of file audio_backend.cc.

References audio_stream_, audio_stream_enabled_, yaze::emu::audio::AudioConfig::channels, config_, device_channels_, device_format_, device_freq_, initialized_, LOG_ERROR, LOG_INFO, stream_buffer_, and stream_native_rate_.

Referenced by QueueSamplesNative().

◆ SupportsAudioStream()

bool yaze::emu::audio::SDL2AudioBackend::SupportsAudioStream ( ) const

inlineoverridevirtual

Reimplemented from yaze::emu::audio::IAudioBackend.

Definition at line 122 of file audio_backend.h.

◆ IsAudioStreamEnabled()

bool yaze::emu::audio::SDL2AudioBackend::IsAudioStreamEnabled ( ) const

overridevirtual

Reimplemented from yaze::emu::audio::IAudioBackend.

Definition at line 475 of file audio_backend.cc.

References audio_stream_, and audio_stream_enabled_.

◆ GetBackendName()

std::string yaze::emu::audio::SDL2AudioBackend::GetBackendName ( ) const

inlineoverridevirtual

Implements yaze::emu::audio::IAudioBackend.

Definition at line 125 of file audio_backend.h.

Member Data Documentation

◆ device_id_

uint32_t yaze::emu::audio::SDL2AudioBackend::device_id_ = 0

private

Definition at line 128 of file audio_backend.h.

Referenced by Clear(), GetStatus(), Initialize(), Pause(), Play(), QueueSamples(), QueueSamplesNative(), Shutdown(), and Stop().

◆ config_

AudioConfig yaze::emu::audio::SDL2AudioBackend::config_

private

Definition at line 129 of file audio_backend.h.

Referenced by GetConfig(), GetStatus(), Initialize(), QueueSamplesNative(), and SetAudioStreamResampling().

◆ initialized_

bool yaze::emu::audio::SDL2AudioBackend::initialized_ = false

private

Definition at line 130 of file audio_backend.h.

Referenced by Clear(), GetStatus(), Initialize(), IsInitialized(), Pause(), Play(), QueueSamples(), QueueSamples(), QueueSamplesNative(), SetAudioStreamResampling(), Shutdown(), and Stop().

◆ volume_

float yaze::emu::audio::SDL2AudioBackend::volume_ = 1.0f

private

Definition at line 131 of file audio_backend.h.

Referenced by GetVolume(), QueueSamples(), QueueSamples(), and SetVolume().

◆ call_count_

int yaze::emu::audio::SDL2AudioBackend::call_count_ = 0

private

Definition at line 132 of file audio_backend.h.

Referenced by QueueSamplesNative().

◆ device_format_

SDL_AudioFormat yaze::emu::audio::SDL2AudioBackend::device_format_ = AUDIO_S16

private

Definition at line 136 of file audio_backend.h.

Referenced by Initialize(), and SetAudioStreamResampling().

◆ device_channels_

int yaze::emu::audio::SDL2AudioBackend::device_channels_ = 2

private

Definition at line 138 of file audio_backend.h.

Referenced by Initialize(), and SetAudioStreamResampling().

◆ device_freq_

int yaze::emu::audio::SDL2AudioBackend::device_freq_ = 48000

private

Definition at line 139 of file audio_backend.h.

Referenced by Initialize(), QueueSamplesNative(), and SetAudioStreamResampling().

◆ audio_stream_enabled_

bool yaze::emu::audio::SDL2AudioBackend::audio_stream_enabled_ = false

private

Definition at line 140 of file audio_backend.h.

Referenced by Initialize(), IsAudioStreamEnabled(), QueueSamplesNative(), SetAudioStreamResampling(), and Shutdown().

◆ stream_native_rate_

int yaze::emu::audio::SDL2AudioBackend::stream_native_rate_ = 0

private

Definition at line 141 of file audio_backend.h.

Referenced by Initialize(), QueueSamplesNative(), SetAudioStreamResampling(), and Shutdown().

◆ audio_stream_

SDL_AudioStream* yaze::emu::audio::SDL2AudioBackend::audio_stream_ = nullptr

private

Definition at line 142 of file audio_backend.h.

Referenced by Clear(), Initialize(), IsAudioStreamEnabled(), QueueSamplesNative(), SetAudioStreamResampling(), and Shutdown().

◆ stream_buffer_

std::vector<int16_t> yaze::emu::audio::SDL2AudioBackend::stream_buffer_

private

Definition at line 143 of file audio_backend.h.

Referenced by Initialize(), QueueSamplesNative(), SetAudioStreamResampling(), and Shutdown().

The documentation for this class was generated from the following files:

src/app/emu/audio/audio_backend.h
src/app/emu/audio/audio_backend.cc

	yaze 0.3.2 Link to the Past ROM Editor

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SDL2AudioBackend()

◆ ~SDL2AudioBackend()

Member Function Documentation

◆ Initialize()

◆ Shutdown()

◆ Play()

◆ Pause()

◆ Stop()

◆ Clear()

◆ QueueSamples() [1/2]

◆ QueueSamples() [2/2]

◆ QueueSamplesNative()

◆ GetStatus()

◆ IsInitialized()

◆ GetConfig()

◆ SetVolume()

◆ GetVolume()

◆ SetAudioStreamResampling()

◆ SupportsAudioStream()

◆ IsAudioStreamEnabled()

◆ GetBackendName()

Member Data Documentation

◆ device_id_

◆ config_

◆ initialized_

◆ volume_

◆ call_count_

◆ device_format_

◆ device_channels_

◆ device_freq_

◆ audio_stream_enabled_

◆ stream_native_rate_

◆ audio_stream_

◆ stream_buffer_