cAudioDecoder - Audio decoder class More...

#include <codec_audio.h>

Public Member Functions
	cAudioDecoder (cSoftHdAudio *)
	Audio decoder class constructor.

	~cAudioDecoder (void)
	Audio decoder class destructor.

void	Open (AVCodecID, AVCodecParameters *=nullptr, AVRational={ .num=1,.den=90000 })
	Open and initiate the audio decoder.

void	Close (void)
	Close the audio decoder.

void	Decode (const AVPacket *)
	Decode an audio packet.

void	FlushBuffers (void)
	Flush the audio decoder.

void	SetPassthrough (int)
	Set audio pass-through mask.

AVCodecID	GetCodecId () const

Private Member Functions
int	DecodePassthrough (const AVPacket , AVFrame )
	Passthrough audio data.

int	UpdateFormat (void)
	Handle audio format changes.

Private Attributes
cSoftHdAudio *	m_pAudio
	audio module

AVCodecContext *	m_pAudioCtx = nullptr
	ffmpeg audio codec context

AVCodecID	m_codecId = AV_CODEC_ID_NONE
	current codec id

AVFrame *	m_pFrame
	decoded ffmpeg audio frame

int64_t	m_lastPts = AV_NOPTS_VALUE
	last seen PTS

int	m_passthroughMask
	passthrough mask to be set

int	m_currentPassthrough
	current passthrough mask

int	m_currentSampleRate
	current sample rate

int	m_currentNumChannels
	current number of channels

int	m_currentHwSampleRate
	current hw sample rate

int	m_currentHwNumChannels
	current number of hw channels

uint16_t	m_spdifOutput [MAX_FRAME_SIZE *2]
	SPDIF output buffer.

int	m_spdifIndex
	index into SPDIF output buffer

int	m_spdifRepeatCount
	SPDIF repeat counter.

Detailed Description

cAudioDecoder - Audio decoder class

Definition at line 76 of file codec_audio.h.

Constructor & Destructor Documentation

◆ cAudioDecoder()

cAudioDecoder::cAudioDecoder ( cSoftHdAudio * audio )

Audio decoder class constructor.

Parameters

audio audio module

Definition at line 46 of file codec_audio.cpp.

References L_CODEC, LOGDEBUG2, LOGFATAL, m_passthroughMask, and m_pFrame.

◆ ~cAudioDecoder()

cAudioDecoder::~cAudioDecoder ( void )

Audio decoder class destructor.

Definition at line 59 of file codec_audio.cpp.

References Close(), and m_pFrame.

Member Function Documentation

◆ Close()

void cAudioDecoder::Close ( void )

Close the audio decoder.

Definition at line 118 of file codec_audio.cpp.

References AV_NOPTS_VALUE, L_CODEC, LOGDEBUG2, m_codecId, m_lastPts, and m_pAudioCtx.

Referenced by cSoftHdDevice::PlayAudio(), and ~cAudioDecoder().

◆ Decode()

void cAudioDecoder::Decode ( const AVPacket * avpkt )

Decode an audio packet.

Parameters

avpkt audio packet to decode

Definition at line 338 of file codec_audio.cpp.

References AV_NOPTS_VALUE, DecodePassthrough(), cSoftHdAudio::Filter(), LOGERROR, m_currentHwNumChannels, m_currentHwSampleRate, m_currentNumChannels, m_currentPassthrough, m_currentSampleRate, m_lastPts, m_passthroughMask, m_pAudio, m_pAudioCtx, m_pFrame, and UpdateFormat().

Referenced by cSoftHdDevice::PlayAudio(), and cSoftHdDevice::PlayAudioPkts().

◆ DecodePassthrough()

int cAudioDecoder::DecodePassthrough	(	const AVPacket *	avpkt,
		AVFrame *	frame
	)

private

Passthrough audio data.

Build spdif headers depending on the codec and send the data to the audio device. Currently supported: AC3, EAC3, DTS

Parameters

avpkt	undecoded audio packet
frame	decoded audio frame

Returns: 0 codec is not supported for passthrough, use Filter to handle the data; -1 sth went wrong, data will be discarded; 1 data accepted if finished, spdif header was created and data was sent to passthrough device

Definition at line 143 of file codec_audio.cpp.

References AC3_FRAME_SIZE, CODEC_AC3, CODEC_DTS, CODEC_EAC3, DTS1_FRAME_SIZE, DTS2_FRAME_SIZE, DTS3_FRAME_SIZE, DTS_PREAMBLE_16BE_1, DTS_PREAMBLE_16BE_2, EAC3_FRAME_SIZE, cSoftHdAudio::Enqueue(), IEC61937_AC3, IEC61937_DTS1, IEC61937_DTS2, IEC61937_DTS3, IEC61937_EAC3, IEC61937_NULL, IEC61937_PREAMBLE1, IEC61937_PREAMBLE2, LOGERROR, m_currentHwSampleRate, m_passthroughMask, m_pAudio, m_pAudioCtx, m_spdifIndex, m_spdifOutput, m_spdifRepeatCount, and cSoftHdAudio::SetTimebase().

Referenced by Decode().

◆ FlushBuffers()

void cAudioDecoder::FlushBuffers ( void )

Flush the audio decoder.

Definition at line 399 of file codec_audio.cpp.

References AV_NOPTS_VALUE, L_CODEC, LOGDEBUG2, m_codecId, m_lastPts, and m_pAudioCtx.

Referenced by cSoftHdDevice::ClearAudio().

◆ GetCodecId()

AVCodecID cAudioDecoder::GetCodecId ( ) const

inline

Definition at line 85 of file codec_audio.h.

References m_codecId.

Referenced by cSoftHdDevice::PlayAudio().

◆ Open()

void cAudioDecoder::Open	(	AVCodecID	codecId,
		AVCodecParameters *	par = `nullptr`,
		AVRational	timebase = `{ .num = 1, .den = 90000 }`
	)

Open and initiate the audio decoder.

Parameters

codecId	audio codec id
par	audio codec parameters
timebase	timebase

Definition at line 73 of file codec_audio.cpp.

References L_CODEC, LOGDEBUG2, LOGERROR, LOGFATAL, m_codecId, m_currentHwNumChannels, m_currentHwSampleRate, m_currentNumChannels, m_currentPassthrough, m_currentSampleRate, m_passthroughMask, and m_pAudioCtx.

Referenced by cSoftHdDevice::PlayAudio(), and cSoftHdDevice::SetAudioCodec().

◆ SetPassthrough()

void cAudioDecoder::SetPassthrough ( int mask )

Set audio pass-through mask.

Parameters

mask	codec to enable (AC-3, E-AC-3, DTS)

Definition at line 414 of file codec_audio.cpp.

References CODEC_AC3, CODEC_DTS, CODEC_EAC3, L_CODEC, LOGDEBUG2, and m_passthroughMask.

Referenced by cSoftHdDevice::SetPassthrough().

◆ UpdateFormat()

int cAudioDecoder::UpdateFormat ( void )

private

Handle audio format changes.

Setup audio, if format changed

Returns: 0 if new audio was correctly set up, otherwise return value of cSoftHdAudio::Setup()

Definition at line 284 of file codec_audio.cpp.

References CODEC_AC3, CODEC_DTS, CODEC_EAC3, L_SOUND, LOGDEBUG2, LOGERROR, m_currentHwNumChannels, m_currentHwSampleRate, m_currentNumChannels, m_currentPassthrough, m_currentSampleRate, m_passthroughMask, m_pAudio, m_pAudioCtx, m_spdifIndex, m_spdifRepeatCount, and cSoftHdAudio::Setup().

Referenced by Decode().

Member Data Documentation

◆ m_codecId

AVCodecID cAudioDecoder::m_codecId = AV_CODEC_ID_NONE

private

current codec id

Definition at line 90 of file codec_audio.h.

Referenced by Close(), FlushBuffers(), GetCodecId(), and Open().

◆ m_currentHwNumChannels

int cAudioDecoder::m_currentHwNumChannels

private

current number of hw channels

Definition at line 98 of file codec_audio.h.

Referenced by Decode(), Open(), and UpdateFormat().

◆ m_currentHwSampleRate

int cAudioDecoder::m_currentHwSampleRate

private

current hw sample rate

Definition at line 97 of file codec_audio.h.

Referenced by Decode(), DecodePassthrough(), Open(), and UpdateFormat().

◆ m_currentNumChannels

int cAudioDecoder::m_currentNumChannels

private

current number of channels

Definition at line 96 of file codec_audio.h.

Referenced by Decode(), Open(), and UpdateFormat().

◆ m_currentPassthrough

int cAudioDecoder::m_currentPassthrough

private

current passthrough mask

Definition at line 94 of file codec_audio.h.

Referenced by Decode(), Open(), and UpdateFormat().

◆ m_currentSampleRate

int cAudioDecoder::m_currentSampleRate

private

current sample rate

Definition at line 95 of file codec_audio.h.

Referenced by Decode(), Open(), and UpdateFormat().

◆ m_lastPts

int64_t cAudioDecoder::m_lastPts = AV_NOPTS_VALUE

private

last seen PTS

Definition at line 92 of file codec_audio.h.

Referenced by Close(), Decode(), and FlushBuffers().

◆ m_passthroughMask

int cAudioDecoder::m_passthroughMask

private

passthrough mask to be set

Definition at line 93 of file codec_audio.h.

Referenced by cAudioDecoder(), Decode(), DecodePassthrough(), Open(), SetPassthrough(), and UpdateFormat().

◆ m_pAudio

cSoftHdAudio* cAudioDecoder::m_pAudio

private

audio module

Definition at line 88 of file codec_audio.h.

Referenced by Decode(), DecodePassthrough(), and UpdateFormat().

◆ m_pAudioCtx

AVCodecContext* cAudioDecoder::m_pAudioCtx = nullptr

private

ffmpeg audio codec context

Definition at line 89 of file codec_audio.h.

Referenced by Close(), Decode(), DecodePassthrough(), FlushBuffers(), Open(), and UpdateFormat().

◆ m_pFrame

AVFrame* cAudioDecoder::m_pFrame

private

decoded ffmpeg audio frame

Definition at line 91 of file codec_audio.h.

Referenced by cAudioDecoder(), Decode(), and ~cAudioDecoder().

◆ m_spdifIndex

int cAudioDecoder::m_spdifIndex

private

index into SPDIF output buffer

Definition at line 100 of file codec_audio.h.

Referenced by DecodePassthrough(), and UpdateFormat().

◆ m_spdifOutput

uint16_t cAudioDecoder::m_spdifOutput[MAX_FRAME_SIZE *2]

private

SPDIF output buffer.

Definition at line 99 of file codec_audio.h.

Referenced by DecodePassthrough().

◆ m_spdifRepeatCount

int cAudioDecoder::m_spdifRepeatCount

private

SPDIF repeat counter.

Definition at line 101 of file codec_audio.h.

Referenced by DecodePassthrough(), and UpdateFormat().

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

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ cAudioDecoder()

◆ ~cAudioDecoder()

Member Function Documentation

◆ Close()

◆ Decode()

◆ DecodePassthrough()

◆ FlushBuffers()

◆ GetCodecId()

◆ Open()

◆ SetPassthrough()

◆ UpdateFormat()

Member Data Documentation

◆ m_codecId

◆ m_currentHwNumChannels

◆ m_currentHwSampleRate

◆ m_currentNumChannels

◆ m_currentPassthrough

◆ m_currentSampleRate

◆ m_lastPts

◆ m_passthroughMask

◆ m_pAudio

◆ m_pAudioCtx

◆ m_pFrame

◆ m_spdifIndex

◆ m_spdifOutput

◆ m_spdifRepeatCount