OpusAudioDecoder Class Reference

Decoder for the Opus audio format. Each Opus frame must be provided with one write() call. Therefore, Opus is usually encapsulated in a container format (e.g., Ogg) that splits the stream into frames. More...

#include <CodecOpus.h>

Inheritance diagram for OpusAudioDecoder:

Public Member Functions
	OpusAudioDecoder ()=default
	Construct a new OpusDecoder object.
	OpusAudioDecoder (Print &out_stream)
	Construct a new OpusDecoder object.
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
bool	begin () override
virtual bool	begin (AudioInfo info) override
bool	begin (OpusSettings settings)
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
OpusSettings &	config ()
	Provides access to the configuration.
OpusSettings &	defaultConfig ()
void	end () override
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 () override
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.
void	setOutput (Print &out_stream) override
	Defines the output Stream.
size_t	write (const uint8_t *data, size_t len) override
	write one full opus frame

Public Attributes
int	id
	custom id to be used by application

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

Protected Attributes
bool	active = false
OpusSettings	cfg
OpusDecoder *	dec = nullptr
Vector< uint8_t >	decbuf {0}
AudioInfo	info
bool	is_notify_active = true
Vector< AudioInfoSupport * >	notify_vector
Vector< uint8_t >	outbuf {0}
Print *	p_print = nullptr
const uint32_t	valid_rates [5] = {8000, 12000, 16000, 24000, 48000}

Detailed Description

Decoder for the Opus audio format. Each Opus frame must be provided with one write() call. Therefore, Opus is usually encapsulated in a container format (e.g., Ogg) that splits the stream into frames.

Depends on https://github.com/pschatzmann/arduino-libopus.git

Author

Phil Schatzmann

Copyright

GPLv3

Constructor & Destructor Documentation

OpusAudioDecoder()

OpusAudioDecoder ( Print &  out_stream )

inline

Construct a new OpusDecoder object.

Parameters

out_stream

Output Stream to which we write the decoded result

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, MP3DecoderHelix, MP3DecoderMAD, OggContainerDecoder, Pipeline, and Pipeline::ModifyingStreamAdapter.

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, ResampleStream, and ResampleStreamT< TInterpolator >.

begin() [1/2]

bool begin ( )

inlineoverridevirtual

Reimplemented from AudioDecoder.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlineoverridevirtualinherited

Reimplemented from AudioWriter.

end()

void end ( )

inlineoverridevirtual

Reimplemented from AudioDecoder.

isResultPCM()

virtual bool isResultPCM ( )

inlinevirtualinherited

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

Reimplemented in CopyDecoder, DecoderNetworkFormat, GGWaveDecoder, and ContainerM4A.

operator bool()

operator bool ( )

inlineoverridevirtual

Implements AudioWriter.

setAudioInfo()

void setAudioInfo ( AudioInfo  from )

inlineoverridevirtual

for most decoders this is not needed

Reimplemented from AudioDecoder.

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.

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]

void setOutput ( Print &  out_stream )

inlineoverridevirtual

Defines the output Stream.

Reimplemented from AudioDecoder.

write()

size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtual

write one full opus frame

Implements AudioWriter.

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

• src/AudioTools/AudioCodecs/CodecOpus.h