MP3DecoderMAD Class Reference

MP3 Decoder using https://github.com/pschatzmann/arduino-libmad. More...

#include <CodecMP3MAD.h>

Inheritance diagram for MP3DecoderMAD:

Public Member Functions
	MP3DecoderMAD (libmad::MP3DataCallback dataCallback, libmad::MP3InfoCallback infoCB=nullptr)
	MP3DecoderMAD (Print &mad_output_streamput, libmad::MP3InfoCallback infoCB=nullptr)
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
libmad::MadAudioInfo	audioInfoEx ()
	Provides the last valid audio information.
virtual AudioInfo	audioInfoOut ()
bool	begin ()
	Starts the processing.
virtual bool	begin (AudioInfo info) override
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
libmad::MP3DecoderMAD *	driver ()
void	end ()
	Releases the reserved memory.
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 ()
	Returns true as long as we are processing data.
virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.
void	setAudioDataCallback (libmad::MP3DataCallback cb)
	Defines the callback which receives the decoded data.
virtual void	setAudioInfo (AudioInfo from) override
	for most decoders this is not needed
void	setInfoCallback (libmad::MP3InfoCallback cb)
	Defines the callback which receives the Info changes.
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.
void	setOutput (Print &out)
	Defines where the decoded result is written to.
size_t	write (const uint8_t *data, size_t len)
	Makes the mp3 data available for decoding: however we recommend to provide the data via a callback or input stream.
size_t	write (void *data, size_t len)
	Makes the mp3 data available for decoding: however we recommend to provide the data via a callback or input stream.

Static Public Member Functions
static void	audioChangeCallback (libmad::MadAudioInfo &info)

Public Attributes
int	id
	custom id to be used by application

Protected Member Functions
void	notifyAudioChange (AudioInfo info)
void	writeBlocking (Print *out, uint8_t *data, size_t len)

Protected Attributes
AudioInfo	info
bool	is_notify_active = true
libmad::MP3DecoderMAD *	mad
Vector< AudioInfoSupport * >	notify_vector
Print *	p_print = nullptr

Detailed Description

MP3 Decoder using https://github.com/pschatzmann/arduino-libmad.

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

addNotifyAudioChange()

virtual void addNotifyAudioChange ( AudioInfoSupport &  bi )

inlinevirtual

Adds target to be notified about audio changes.

Reimplemented from AudioInfoSource.

audioInfo()

AudioInfo audioInfo ( )

inlineoverridevirtual

provides the actual input AudioInfo

Reimplemented from AudioDecoder.

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 ( )

inlinevirtual

Starts the processing.

Reimplemented from AudioDecoder.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlineoverridevirtualinherited

Reimplemented from AudioWriter.

end()

void end ( )

inlinevirtual

Releases the reserved memory.

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()

operator bool ( )

inlinevirtual

Returns true as long as we are processing data.

Implements AudioWriter.

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]

virtual void setOutput ( AudioOutput &  out_stream )

inlinevirtualinherited

Defines where the decoded result is written to.

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

setOutput() [3/3]

void setOutput ( Print &  out_stream )

inlinevirtual

Defines where the decoded result is written to.

Reimplemented from AudioDecoder.

write()

size_t write ( const uint8_t *  data, size_t  len  )

inlinevirtual

Makes the mp3 data available for decoding: however we recommend to provide the data via a callback or input stream.

Implements AudioWriter.

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

• src/AudioTools/AudioCodecs/CodecMP3MAD.h