MTSDecoder Class Reference

MPEG-TS (MTS) decoder. Extracts (demuxes) the indicated audio/video data from a MPEG-TS (MTS) data stream. You can define the relevant stream types via the API: addStreamType(MTSStreamType). By default, the decoder selects the AUDIO_AAC, AUDIO_AAC_LATM stream types. More...

#include <CodecMTS.h>

Inheritance diagram for MTSDecoder:

Public Member Functions
	MTSDecoder ()=default
	Default constructor.
	MTSDecoder (AudioDecoder &dec)
	Provide the AAC decoder (or MP3 Decoder) to receive the extracted content.
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
void	addStreamType (MTSStreamType type)
	Defines the stream type that should be extracted.
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
bool	begin () override
	Start the prcessor.
virtual bool	begin (AudioInfo info) override
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
void	clearStreamTypes ()
	Clears the stream type filter.
void	end () override
	Stops the processing.
Print *	getOutput ()
bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.
virtual bool	isResultPCM ()
	Returns true to indicate that the decoding result is PCM data.
bool	isStreamTypeActive (MTSStreamType type)
	Checks if the stream type is active.
const char *	mime ()
	Provides the mime type: "video/MP2T";.
virtual	operator bool () override
virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.
void	resizeBuffer (int size)
	Set a new write buffer size (default is 2000)
void	setAudioInfo (AudioInfo from) override
	for most decoders this is not needed
virtual bool	setCodecConfig (const uint8_t *data, size_t len)
	Some decoders need e.g. a magic cookie to provide the relevant info for decoding.
void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)
void	setOutput (AudioOutput &out_stream) override
	Defines where the decoded result is written to.
void	setOutput (AudioStream &out_stream) override
	Defines where the decoded result is written to.
void	setOutput (Print &out_stream) override
	Defines where the decoded result is written to.
size_t	write (const uint8_t *data, size_t len) override

Public Attributes
int	id
	custom id to be used by application

Protected Member Functions
void	addPID (uint16_t pid)
void	demux ()
	demux the available data
int	findSyncWord (const uint8_t *buf, size_t nBytes, uint8_t synch=0xFF, uint8_t syncl=0xF0)
	Finds the mp3/aac sync word.
int	getPayloadStart (uint8_t *packet, bool isPES, bool &payloadUnitStartIndicator)
bool	isPESStartCodeValid (uint8_t *pes)
	check for PES packet start code prefix
void	notifyAudioChange (AudioInfo info)
bool	parse ()
	Parse a single packet and remove the processed data.
void	parsePacket (uint8_t *packet, int pid)
	Detailed processing for parsing a single packet.
void	parsePAT (uint8_t *pat, int len)
void	parsePES (uint8_t *packet, int pid)
void	parsePMT (uint8_t *pmt, int len)
int	syncPos ()
	Find the position of the next sync byte: Usually on position 0.
const char *	toStr (MTSStreamType type)
	Convert the relevant MTSStreamType to a string.
void	writeBlocking (Print *out, uint8_t *data, size_t len)

Protected Attributes
SingleBuffer< uint8_t >	buffer { 2000 }
int	frame_length = 0
AudioInfo	info
bool	is_active = false
bool	is_adts_missing = false
bool	is_notify_active = true
Vector< AudioInfoSupport * >	notify_vector
int	open_pes_data_size = 0
AudioDecoder *	p_dec = nullptr
Print *	p_print = nullptr
size_t	pes_count = 0
Vector< int >	pids {0}
uint16_t	pmt_pid = 0xFFFF
MTSStreamType	selected_stream_type
Vector< MTSStreamType >	stream_types

Detailed Description

MPEG-TS (MTS) decoder. Extracts (demuxes) the indicated audio/video data from a MPEG-TS (MTS) data stream. You can define the relevant stream types via the API: addStreamType(MTSStreamType). By default, the decoder selects the AUDIO_AAC, AUDIO_AAC_LATM stream types.

Author

Phil Schatzmann

Copyright

GPLv3

Constructor & Destructor Documentation

MTSDecoder() [1/2]

MTSDecoder ( )

default

Default constructor.

MTSDecoder() [2/2]

MTSDecoder ( AudioDecoder &  dec )

inline

Provide the AAC decoder (or MP3 Decoder) to receive the extracted content.

Member Function Documentation

addNotifyAudioChange()

virtual void addNotifyAudioChange ( AudioInfoSupport &  bi )

inlinevirtualinherited

Adds target to be notified about audio changes.

Reimplemented in CodecNOP, EncodedAudioOutput, EncodedAudioStream, AACDecoderFDK, DecoderBasic, CodecChain, MP3DecoderHelix, MP3DecoderMAD, OggContainerDecoder, RTSPClient< TcpClient, UdpSocket >, Pipeline, and Pipeline::ModifyingStreamAdapter.

addPID()

void addPID ( uint16_t  pid )

inlineprotected

Add the PID for which we want to extract the audio data from the PES packets

addStreamType()

void addStreamType ( MTSStreamType  type )

inline

Defines the stream type that should be extracted.

audioInfo()

AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in CodecNOP, DecoderBasic, DSFDecoder, MP3DecoderHelix, MP3DecoderMAD, OpusAudioDecoder, VorbisDecoder, WAVDecoder, WavIMADecoder, OggContainerDecoder, and VorbisDecoder.

audioInfoOut()

virtual AudioInfo audioInfoOut ( )

inlinevirtualinherited

provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream

Reimplemented in PureDataStream, PWMAudioOutput, ChannelFormatConverterStreamT< T >, ChannelFormatConverterStream, NumberFormatConverterStreamT< TFrom, TTo >, NumberFormatConverterStream, FormatConverterStream, Pipeline, ResampleStream, and ResampleStreamT< TInterpolator >.

begin() [1/2]

bool begin ( )

inlineoverridevirtual

Start the prcessor.

Reimplemented from AudioDecoder.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlineoverridevirtualinherited

Reimplemented from AudioWriter.

Reimplemented in DecoderBasic, and OggContainerDecoder.

clearNotifyAudioChange()

virtual void clearNotifyAudioChange ( )

inlinevirtualinherited

Deletes all change notify subscriptions.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

clearStreamTypes()

void clearStreamTypes ( )

inline

Clears the stream type filter.

demux()

void demux ( )

inlineprotected

demux the available data

end()

void end ( )

inlineoverridevirtual

Stops the processing.

Reimplemented from AudioDecoder.

findSyncWord()

int findSyncWord ( const uint8_t *  buf, size_t  nBytes, uint8_t  synch = 0xFF, uint8_t  syncl = 0xF0  )

inlineprotected

Finds the mp3/aac sync word.

getOutput()

Print * getOutput ( )

inlineinherited

getPayloadStart()

int getPayloadStart ( uint8_t *  packet, bool  isPES, bool &  payloadUnitStartIndicator  )

inlineprotected

isNotifyActive()

bool isNotifyActive ( )

inlineinherited

Checks if the automatic AudioInfo update is active.

isPESStartCodeValid()

bool isPESStartCodeValid ( uint8_t *  pes )

inlineprotected

check for PES packet start code prefix

isResultPCM()

virtual bool isResultPCM ( )

inlinevirtualinherited

Returns true to indicate that the decoding result is PCM data.

Reimplemented in CopyDecoder, DecoderNetworkFormat, and ContainerM4A.

isStreamTypeActive()

bool isStreamTypeActive ( MTSStreamType  type )

inline

Checks if the stream type is active.

mime()

const char * mime ( )

inline

Provides the mime type: "video/MP2T";.

notifyAudioChange()

void notifyAudioChange ( AudioInfo  info )

inlineprotectedinherited

operator bool()

virtual operator bool ( )

inlineoverridevirtual

Implements AudioWriter.

parse()

bool parse ( )

inlineprotected

Parse a single packet and remove the processed data.

parsePacket()

void parsePacket ( uint8_t *  packet, int  pid  )

inlineprotected

Detailed processing for parsing a single packet.

parsePAT()

void parsePAT ( uint8_t *  pat, int  len  )

inlineprotected

parsePES()

void parsePES ( uint8_t *  packet, int  pid  )

inlineprotected

Check for ADTS

Write the data

parsePMT()

void parsePMT ( uint8_t *  pmt, int  len  )

inlineprotected

removeNotifyAudioChange()

virtual bool removeNotifyAudioChange ( AudioInfoSupport &  bi )

inlinevirtualinherited

Removes a target in order not to be notified about audio changes.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

resizeBuffer()

void resizeBuffer ( int  size )

inline

Set a new write buffer size (default is 2000)

setAudioInfo()

void setAudioInfo ( AudioInfo  from )

inlineoverridevirtualinherited

for most decoders this is not needed

Implements AudioWriter.

Reimplemented in DecoderALAC, CodecChain, DSFDecoder, DecoderL8, OpusAudioDecoder, CodecNOP, and G7xxDecoder.

setCodecConfig()

virtual bool setCodecConfig ( const uint8_t *  data, size_t  len  )

inlinevirtualinherited

Some decoders need e.g. a magic cookie to provide the relevant info for decoding.

Reimplemented in DecoderALAC, and MultiDecoder.

setNotifyActive()

void setNotifyActive ( bool  flag )

inlineinherited

Deactivate/Reactivate automatic AudioInfo updates: (default is active)

setOutput() [1/3]

void setOutput ( AudioOutput &  out_stream )

inlineoverridevirtual

Defines where the decoded result is written to.

Reimplemented from AudioDecoder.

setOutput() [2/3]

void setOutput ( AudioStream &  out_stream )

inlineoverridevirtual

Defines where the decoded result is written to.

Reimplemented from AudioDecoder.

setOutput() [3/3]

void setOutput ( Print &  out_stream )

inlineoverridevirtual

Defines where the decoded result is written to.

Reimplemented from AudioDecoder.

syncPos()

int syncPos ( )

inlineprotected

Find the position of the next sync byte: Usually on position 0.

toStr()

const char * toStr ( MTSStreamType  type )

inlineprotected

Convert the relevant MTSStreamType to a string.

write()

size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtual

Implements AudioWriter.

writeBlocking()

void writeBlocking ( Print *  out, uint8_t *  data, size_t  len  )

inlineprotectedinherited

Member Data Documentation

buffer

SingleBuffer<uint8_t> buffer { 2000 }

protected

frame_length

int frame_length = 0

protected

id

int id

inherited

custom id to be used by application

info

AudioInfo info

protectedinherited

is_active

bool is_active = false

protected

is_adts_missing

bool is_adts_missing = false

protected

is_notify_active

bool is_notify_active = true

protectedinherited

notify_vector

Vector<AudioInfoSupport*> notify_vector

protectedinherited

open_pes_data_size

int open_pes_data_size = 0

protected

p_dec

AudioDecoder* p_dec = nullptr

protected

p_print

Print* p_print = nullptr

protectedinherited

pes_count

size_t pes_count = 0

protected

pids

Vector<int> pids {0}

protected

pmt_pid

uint16_t pmt_pid = 0xFFFF

protected

selected_stream_type

MTSStreamType selected_stream_type

protected

stream_types

Vector<MTSStreamType> stream_types

protected

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

• src/AudioTools/AudioCodecs/CodecMTS.h