AudioOutputWithCallback Class Reference

ESP8266Audio AudioOutput class which stores the data in a temporary buffer. The buffer can be consumed e.g. by a callback function by calling read(); Dependencies: ESP8266Audio Library Dependencies: ESP32-A2DP Library. More...

#include <AudioESP8266.h>

Inheritance diagram for AudioOutputWithCallback:

Public Member Functions
	AudioOutputWithCallback (int bufferSize, int bufferCount)
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
virtual AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
int	available () override
	Returns the available bytes.
virtual int	availableForWrite () override
virtual int	availableForWrite () override
virtual bool	begin ()
	Activates the output.
virtual bool	begin (AudioInfo info)
void	clear ()
	Clears all the data in the buffer.
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
virtual bool	ConsumeSample (int16_t sample[2])
	puts the sample into a buffer
virtual void	end ()
virtual void	end ()
virtual void	flush ()
void	flush () override
	empties the buffer
virtual bool	isDeletable ()
	If true we need to release the related memory in the destructor.
bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.
bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.
virtual	operator bool ()
virtual	operator bool ()
int	peek () override
	peeks a byte - to be avoided
size_t	peekBytes (uint8_t *data, size_t len)
	Provides data w/o consuming.
int	read () override
	reads a byte - to be avoided
size_t	read (Frame *src, size_t len)
	Provides the data from the internal buffer to the callback.
size_t	readBytes (uint8_t *data, size_t len) override
	Use this method !!
virtual size_t	readSilence (uint8_t *buffer, size_t length)
	Source to generate silence: just sets the buffer to 0.
virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.
void	resize (int size)
	Resize the buffer.
virtual void	setAudioInfo (AudioInfo newInfo) override
	Defines the input AudioInfo.
virtual void	setAudioInfo (AudioInfo newInfo) override
	Defines the input AudioInfo.
void	setMinUnbufferedReadSize (size_t size)
	Defines the minimum direct unbuffered read size to the original source (default is 1024)
void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)
void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)
void	setOutput (Print &out) override
	Defines/Changes the output target.
void	setStream (Print &out)
void	setStream (Stream &io) override
	Defines/Changes the input & output.
void	setWriteBufferSize (int size)
virtual bool	stop ()
	stops the processing
size_t	write (const uint8_t *data, size_t len) override
	Use this method: write an array.
virtual size_t	write (const uint8_t *data, size_t len) override=0
size_t	write (uint8_t c) override
	writes a byte to the buffer
virtual size_t	write (uint8_t ch) override
virtual void	writeSilence (size_t len)
virtual void	writeSilence (size_t len)
	Writes len bytes of silence (=0).

Protected Member Functions
virtual int	not_supported (int out, const char *msg="")
void	notifyAudioChange (AudioInfo info)
void	notifyAudioChange (AudioInfo info)
virtual size_t	readExt (uint8_t *data, size_t len)
void	refill ()
	refills the buffer with data from the source
void	refill (size_t len)
	refill only if not enough data
void	refillReadBuffer ()
virtual size_t	writeExt (const uint8_t *data, size_t len)

Protected Attributes
int	_timeout = 10
int	_timeout = 10
bool	active
SingleBuffer< uint8_t >	buffer {0}
NBuffer< Frame > *	callback_buffer_ptr
AudioInfo	cfg
AudioInfo	info
bool	is_active = false
bool	is_notify_active = true
bool	is_notify_active = true
size_t	minReadBufferSize = 1024
Vector< AudioInfoSupport * >	notify_vector
Vector< AudioInfoSupport * >	notify_vector
Stream *	p_in = nullptr
Print *	p_out = nullptr
SingleBuffer< uint8_t >	tmp {MAX_SINGLE_CHARS}
RingBuffer< uint8_t >	tmp_in {0}
RingBuffer< uint8_t >	tmp_out {0}
int	tmpPos = 0
int	write_buffer_size = MAX_SINGLE_CHARS

Detailed Description

ESP8266Audio AudioOutput class which stores the data in a temporary buffer. The buffer can be consumed e.g. by a callback function by calling read(); Dependencies: ESP8266Audio Library Dependencies: ESP32-A2DP Library.

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, EncodedAudioOutput, EncodedAudioStream, AACDecoderFDK, DecoderBasic, CodecChain, MP3DecoderHelix, MP3DecoderMAD, OggContainerDecoder, Pipeline, and Pipeline::ModifyingStreamAdapter.

audioInfo() [1/2]

virtual AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in AdapterPrintToAudioOutput, EncodedAudioOutput, and AdapterAudioStreamToAudioOutput.

audioInfo() [2/2]

virtual AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in JupyterAudioT< T >, MozziStream, TimerCallbackAudioStream, EncodedAudioStream, PureDataStream, AdapterAudioOutputToAudioStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, and InputMerge< T >.

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 >.

available()

int available ( )

inlineoverridevirtualinherited

Returns the available bytes.

Reimplemented from BaseStream.

availableForWrite() [1/2]

virtual int availableForWrite ( )

inlineoverridevirtualinherited

Reimplemented from Print.

Reimplemented in RTSPOutput.

availableForWrite() [2/2]

virtual int availableForWrite ( )

inlineoverridevirtualinherited

Reimplemented from Print.

Reimplemented in UDPStream, A2DPStream, AudioFFTBase, I2SCodecStream, Equalizer3Bands, Equalizer3BandsPerChannel, AbstractURLStream, URLStreamESP32, I2SStream, MeasuringStream, ProgressStream, FrequencyDetectorAutoCorrelation, FrequencyDetectorZeroCrossing, and VolumeStream.

begin() [1/2]

virtual bool begin ( )

inlinevirtual

Activates the output.

Reimplemented from AudioOutput.

begin() [2/2]

virtual bool begin ( AudioInfo  info )

inlinevirtualinherited

Reimplemented in AudioESP32ULP, CsvOutput< T >, and EncodedAudioOutput.

end() [1/2]

virtual void end ( )

inlinevirtualinherited

Reimplemented in PitchShiftOutput< T, BufferT >, EncodedAudioOutput, and OggContainerOutput.

end() [2/2]

virtual void end ( )

inlinevirtualinherited

Reimplemented in FaustStream< DSP >, I2SCodecStream, VS1053Stream, WM8960Stream, ESPNowStream, I2SStream, TimerCallbackAudioStream, AudioFFTBase, AudioKitStream, HLSStreamT< URLStream >, AnalogAudioStream, HttpRequest, ICYStreamT< T >, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, InputMixer< T >, InputMerge< T >, QueueStream< T >, QueueStream< uint8_t >, and Pipeline.

flush() [1/2]

virtual void flush ( )

inlinevirtualinherited

Reimplemented from Print.

flush() [2/2]

void flush ( )

inlineoverridevirtualinherited

empties the buffer

Reimplemented from BaseStream.

isDeletable()

virtual bool isDeletable ( )

inlinevirtualinherited

If true we need to release the related memory in the destructor.

Reimplemented in AdapterPrintToAudioOutput, and AdapterAudioStreamToAudioOutput.

operator bool() [1/2]

virtual operator bool ( )

inlinevirtualinherited

Reimplemented in RTSPOutput, and EncodedAudioOutput.

operator bool() [2/2]

virtual operator bool ( )

inlinevirtualinherited

Reimplemented in A2DPStream, ICYStreamT< T >, I2SStream, MemoryStream, and Pipeline.

readBytes()

size_t readBytes ( uint8_t *  data, size_t  len  )

inlineoverridevirtualinherited

Use this method !!

Reimplemented from AudioStream.

readExt()

virtual size_t readExt ( uint8_t *  data, size_t  len  )

inlineprotectedvirtual

Reimplemented from BufferedStream.

setAudioInfo() [1/2]

virtual void setAudioInfo ( AudioInfo  info )

inlineoverridevirtualinherited

Defines the input AudioInfo.

Implements AudioInfoSupport.

Reimplemented in ChannelsSelectOutput, AdapterPrintToAudioOutput, MultiOutput, AdapterAudioStreamToAudioOutput, CsvOutput< T >, PWMAudioOutput, and EncodedAudioOutput.

setAudioInfo() [2/2]

virtual void setAudioInfo ( AudioInfo  info )

inlineoverridevirtualinherited

Defines the input AudioInfo.

Implements AudioInfoSupport.

Reimplemented in VS1053Stream, WM8960Stream, ChannelFormatConverterStreamT< T >, ChannelFormatConverterStream, VolumeStream, MiniAudioStream, PortAudioStream, I2SCodecStream, MozziStream, SPDIFOutput, AudioLoRa, AnalogAudioStream, I2SStream, TimerCallbackAudioStream, AudioBLEStream, LoRaStream, AudioFFTBase, AudioKitStream, VBANStream, AnalogAudioArduino, Equalizer3Bands, Equalizer3BandsPerChannel, AdapterAudioOutputToAudioStream, TimedStream, MeasuringStream, ProgressStream, CallbackStream, VolumeMeter, FormatConverterStream, FadeStream, GoertzelStream, Pipeline::ModifyingStreamAdapter, PureDataStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, NumberFormatConverterStreamT< TFrom, TTo >, NumberFormatConverterStream, Pipeline, ResampleStream, and ResampleStreamT< TInterpolator >.

setOutput()

void setOutput ( Print &  out )

inlineoverridevirtualinherited

Defines/Changes the output target.

Implements ModifyingStream.

setStream()

void setStream ( Stream &  in )

inlineoverridevirtualinherited

Defines/Changes the input & output.

Implements ModifyingStream.

write() [1/3]

size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtualinherited

Use this method: write an array.

Reimplemented from AudioStream.

write() [2/3]

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

overridepure virtualinherited

Reimplemented from Print.

Implemented in MetaDataOutput, EncodedAudioOutput, OggContainerOutput, AudioServerEx, RTSPOutput, WebSocketOutput, PitchShiftOutput< T, BufferT >, MetaDataFilter, and CsvOutput< T >.

write() [3/3]

size_t write ( uint8_t  c )

inlineoverridevirtualinherited

writes a byte to the buffer

Reimplemented from BaseStream.

writeExt()

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

inlineprotectedvirtual

Reimplemented from BufferedStream.

writeSilence()

virtual void writeSilence ( size_t  len )

inlinevirtualinherited

Writes n 0 values (= silence)

Parameters

len

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

• src/AudioTools/AudioLibs/AudioESP8266.h