MTSDecoder Class Reference

MPEG-TS (MTS) decoder. Extracts (demuxes) the indicaated 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.
virtual AudioInfo	audioInfo ()
	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)
virtual void	setAudioInfo (AudioInfo from) override
	for most decoders this is not needed
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 indicaated 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

Member Function Documentation

addNotifyAudioChange()

virtual void addNotifyAudioChange ( AudioInfoSupport &  bi )

inlinevirtualinherited

Adds target to be notified about audio changes.

Reimplemented in CodecNOP, MP3DecoderMAD, EncodedAudioOutput, EncodedAudioStream, AACDecoderFDK, DecoderBasic, MP3DecoderHelix, OggContainerDecoder, 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

audioInfo()

virtual AudioInfo audioInfo ( )

inlinevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in CodecNOP, GGWaveDecoder, AACDecoderFDK, AACDecoderHelix, DecoderBasic, MP3DecoderHelix, MP3DecoderMAD, OpusAudioDecoder, WAVDecoder, WavIMADecoder, and OggContainerDecoder.

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, and ResampleStream.

begin() [1/2]

bool begin ( )

inlineoverridevirtual

Start the prcessor.

Reimplemented from AudioDecoder.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlineoverridevirtualinherited

Reimplemented from AudioWriter.

end()

void end ( )

inlineoverridevirtual

Stops the processing.

Reimplemented from AudioDecoder.

isResultPCM()

virtual bool isResultPCM ( )

inlinevirtualinherited

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

Reimplemented in CopyDecoder, and GGWaveDecoder.

operator bool()

virtual operator bool ( )

inlineoverridevirtual

Implements AudioWriter.

parsePES()

void parsePES ( uint8_t *  packet, int  pid  )

inlineprotected

Check for ADTS

Write the data

setAudioInfo()

virtual void setAudioInfo ( AudioInfo  from )

inlineoverridevirtualinherited

for most decoders this is not needed

Implements AudioWriter.

Reimplemented in GGWaveDecoder, DecoderL8, OpusAudioDecoder, CodecNOP, AACDecoderHelix, and G7xxDecoder.

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.

write()

size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtual

Implements AudioWriter.

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

• src/AudioTools/AudioCodecs/CodecMTS.h