cuttlefish::AudioMixer Class Reference

#include <audio_mixer.h>

Public Member Functions
	AudioMixer (std::shared_ptr< webrtc_streaming::AudioSink > audio_sink, const AudioMixerSettings &settings)
	~AudioMixer ()
void	Start ()
void	Stop ()
void	OnPlayback (uint32_t stream_id, uint32_t stream_sample_rate, uint8_t stream_channels_count, uint8_t stream_bits_per_channel, float volume, const uint8_t *buffer, size_t size)
void	OnStreamStopped (uint32_t stream_id)

Private Member Functions
void	MixerLoop ()

Private Attributes
const uint8_t	channels_count_
const uint32_t	sample_rate_
const size_t	sample_size_bytes_ = sizeof(int16_t)
const size_t	frame_size_bytes_ = sample_size_bytes_ * channels_count_
const size_t	chunk_frames_count_ = sample_rate_ / 100
std::shared_ptr< webrtc_streaming::AudioSink >	audio_sink_
std::mutex	mutex_
std::vector< uint8_t >	mixed_buffer_
size_t	last_active_frame_ = 0
std::unordered_map< uint32_t, size_t >	next_frame_
std::vector< std::vector< float > >	channles_map
std::thread	mixer_thread_
std::atomic< bool >	stop_mixer_ {false}
std::condition_variable	mixer_cv_

Constructor & Destructor Documentation

AudioMixer()

cuttlefish::AudioMixer::AudioMixer	(	std::shared_ptr< webrtc_streaming::AudioSink >	audio_sink,
		const AudioMixerSettings &	settings
	)

~AudioMixer()

cuttlefish::AudioMixer::~AudioMixer

(

)

Member Function Documentation

MixerLoop()

void cuttlefish::AudioMixer::MixerLoop ( )

private

OnPlayback()

void cuttlefish::AudioMixer::OnPlayback	(	uint32_t	stream_id,
		uint32_t	stream_sample_rate,
		uint8_t	stream_channels_count,
		uint8_t	stream_bits_per_channel,
		float	volume,
		const uint8_t *	buffer,
		size_t	size
	)

OnStreamStopped()

void cuttlefish::AudioMixer::OnStreamStopped

(

uint32_t

stream_id

)

Start()

void cuttlefish::AudioMixer::Start

(

)

Stop()

void cuttlefish::AudioMixer::Stop

(

)

Member Data Documentation

audio_sink_

std::shared_ptr<webrtc_streaming::AudioSink> cuttlefish::AudioMixer::audio_sink_

private

channels_count_

const uint8_t cuttlefish::AudioMixer::channels_count_

private

channles_map

std::vector<std::vector<float> > cuttlefish::AudioMixer::channles_map

private

Initial value:

= {{
      {1, 0, 0, 0, 0, 0},
      {0, 1, 0, 0, 0, 0},
      {0, 0, 1, 0, 0, 0},
      {0, 0, 0, 1, 0, 0},
      {0, 0, 0, 0, 1, 0},
      {0, 0, 0, 0, 0, 1},
  }}

chunk_frames_count_

const size_t cuttlefish::AudioMixer::chunk_frames_count_ = sample_rate_ / 100

private

frame_size_bytes_

const size_t cuttlefish::AudioMixer::frame_size_bytes_ = sample_size_bytes_ * channels_count_

private

last_active_frame_

size_t cuttlefish::AudioMixer::last_active_frame_ = 0

private

mixed_buffer_

std::vector<uint8_t> cuttlefish::AudioMixer::mixed_buffer_

private

mixer_cv_

std::condition_variable cuttlefish::AudioMixer::mixer_cv_

private

mixer_thread_

std::thread cuttlefish::AudioMixer::mixer_thread_

private

mutex_

std::mutex cuttlefish::AudioMixer::mutex_

private

next_frame_

std::unordered_map<uint32_t, size_t> cuttlefish::AudioMixer::next_frame_

private

sample_rate_

const uint32_t cuttlefish::AudioMixer::sample_rate_

private

sample_size_bytes_

const size_t cuttlefish::AudioMixer::sample_size_bytes_ = sizeof(int16_t)

private

stop_mixer_

std::atomic<bool> cuttlefish::AudioMixer::stop_mixer_ {false}

private

---

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

• cuttlefish/host/frontend/webrtc/audio_mixer.h
• cuttlefish/host/frontend/webrtc/audio_mixer.cpp