SBCDecoder Class Reference

Decoder for SBC. Depends on https://github.com/pschatzmann/arduino-libsbc. Inspired by sbcdec.c. More...

#include <CodecSBC.h>

Inheritance diagram for SBCDecoder:

Public Member Functions
	SBCDecoder (int bufferSize=8192)
	~SBCDecoder ()
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
virtual bool	begin ()
virtual bool	begin (AudioInfo info) override
int	bytesCompressed ()
	Provides the compressed length in bytes (after encoding)
int	bytesUncompressed ()
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
virtual void	end ()
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.
	operator bool ()
virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.
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)
virtual void	setOutput (AudioOutput &out_stream)
	Defines where the decoded result is written to.
virtual void	setOutput (AudioStream &out_stream)
	Defines where the decoded result is written to.
virtual void	setOutput (Print &out_stream)
	Defines where the decoded result is written to.
virtual size_t	write (const uint8_t *data, size_t len)

Public Attributes
int	id
	custom id to be used by application

Protected Member Functions
int	codeSize ()
int	firstWrite (const void *data, size_t length)
	Determines the framelen.
int	frameLength ()
	Provides the compressed length in bytes (after encoding)
bool	isValidFrameLen (int len)
void	notifyAudioChange (AudioInfo info)
void	processByte (uint8_t byte)
	Build decoding buffer and decode when frame is full.
void	setupAudioInfo ()
	Process audio info.
void	setupInputBuffer (int len)
void	writeBlocking (Print *out, uint8_t *data, size_t len)

Protected Attributes
int	framelen
AudioInfo	info
uint8_t *	input_buffer = nullptr
int	input_pos = 0
bool	is_active = false
bool	is_first = true
bool	is_notify_active = true
Vector< AudioInfoSupport * >	notify_vector
Print *	p_print = nullptr
uint8_t *	result_buffer = nullptr
int	result_buffer_size
sbc_t	sbc

Detailed Description

Decoder for SBC. Depends on https://github.com/pschatzmann/arduino-libsbc. Inspired by sbcdec.c.

Author

Phil Schatzmann

Copyright

GPLv3

Constructor & Destructor Documentation

SBCDecoder()

SBCDecoder ( int  bufferSize = 8192 )

inline

~SBCDecoder()

~SBCDecoder ( )

inline

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.

audioInfo()

AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in CodecNOP, DecoderBasic, DSFDecoder, MP3DecoderHelix, MP3DecoderMAD, OpusAudioDecoder, OpusMultiStreamAudioDecoder, 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 MP3EncoderShine, PureDataStream, PWMAudioOutput< PWMDriverT >, ChannelFormatConverterStreamT< T >, ChannelFormatConverterStream, NumberFormatConverterStreamT< TFrom, TTo >, NumberFormatConverterStream, FormatConverterStream, Pipeline, ResampleStream, and ResampleStreamT< TInterpolator >.

begin() [1/2]

virtual bool begin ( )

inlinevirtual

Reimplemented from AudioDecoder.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlineoverridevirtualinherited

Reimplemented from AudioWriter.

Reimplemented in DecoderBasic, and OggContainerDecoder.

bytesCompressed()

int bytesCompressed ( )

inline

Provides the compressed length in bytes (after encoding)

bytesUncompressed()

int bytesUncompressed ( )

inline

clearNotifyAudioChange()

virtual void clearNotifyAudioChange ( )

inlinevirtualinherited

Deletes all change notify subscriptions.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

codeSize()

int codeSize ( )

inlineprotected

end()

virtual void end ( )

inlinevirtual

Reimplemented from AudioDecoder.

firstWrite()

int firstWrite ( const void *  data, size_t  length  )

inlineprotected

Determines the framelen.

frameLength()

int frameLength ( )

inlineprotected

Provides the compressed length in bytes (after encoding)

getOutput()

Print * getOutput ( )

inlineinherited

isNotifyActive()

bool isNotifyActive ( )

inlineinherited

Checks if the automatic AudioInfo update is active.

isResultPCM()

virtual bool isResultPCM ( )

inlinevirtualinherited

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

Reimplemented in CopyDecoder, DecoderNetworkFormat, and ContainerM4A.

isValidFrameLen()

bool isValidFrameLen ( int  len )

inlineprotected

notifyAudioChange()

void notifyAudioChange ( AudioInfo  info )

inlineprotectedinherited

operator bool()

operator bool ( )

inlinevirtual

Implements AudioWriter.

processByte()

void processByte ( uint8_t  byte )

inlineprotected

Build decoding buffer and decode when frame is full.

removeNotifyAudioChange()

virtual bool removeNotifyAudioChange ( AudioInfoSupport &  bi )

inlinevirtualinherited

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

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

setAudioInfo()

void setAudioInfo ( AudioInfo  from )

inlineoverridevirtualinherited

for most decoders this is not needed

Implements AudioWriter.

Reimplemented in DecoderALAC, CodecChain, DSFDecoder, DecoderL8, OpusAudioDecoder, OpusMultiStreamAudioDecoder, CodecNOP, G729Decoder, 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]

virtual void setOutput ( AudioOutput &  out_stream )

inlinevirtualinherited

Defines where the decoded result is written to.

Reimplemented in ADTSDecoder, CodecChain, MTSDecoder, MTSDecoderTSDemux, and MetaDataFilterDecoder.

setOutput() [2/3]

virtual void setOutput ( AudioStream &  out_stream )

inlinevirtualinherited

Defines where the decoded result is written to.

Reimplemented in ADTSDecoder, CodecChain, MTSDecoder, MTSDecoderTSDemux, and MetaDataFilterDecoder.

setOutput() [3/3]

virtual void setOutput ( Print &  out_stream )

inlinevirtual

Defines where the decoded result is written to.

Reimplemented from AudioDecoder.

setupAudioInfo()

void setupAudioInfo ( )

inlineprotected

Process audio info.

setupInputBuffer()

void setupInputBuffer ( int  len )

inlineprotected

write()

virtual size_t write ( const uint8_t *  data, size_t  len  )

inlinevirtual

Implements AudioWriter.

writeBlocking()

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

inlineprotectedinherited

Member Data Documentation

framelen

int framelen

protected

id

int id

inherited

custom id to be used by application

info

AudioInfo info

protectedinherited

input_buffer

uint8_t* input_buffer = nullptr

protected

input_pos

int input_pos = 0

protected

is_active

bool is_active = false

protected

is_first

bool is_first = true

protected

is_notify_active

bool is_notify_active = true

protectedinherited

notify_vector

Vector<AudioInfoSupport*> notify_vector

protectedinherited

p_print

Print* p_print = nullptr

protected

result_buffer

uint8_t* result_buffer = nullptr

protected

result_buffer_size

int result_buffer_size

protected

sbc

sbc_t sbc

protected

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

• src/AudioTools/AudioCodecs/CodecSBC.h