R2ROutput Class Reference

Output to R-2R DAC. You need to define the used digital pins in the configuration. Any number of bits is supported on max 2 channels. For a 4 bit single channel, you need to define 4 digital pins. see https://www.electronics-tutorials.ws/combination/r-2r-dac.html The default driver implementation uses Arduino digitalWrite(). You can provide your own optimized driver. More...

#include <R2ROutput.h>

Inheritance diagram for R2ROutput:

Public Member Functions
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
virtual AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
virtual int	availableForWrite () override
bool	begin () override
virtual bool	begin (AudioInfo info)
bool	begin (R2RConfig c)
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
R2RConfig	defaultConfig ()
virtual void	end ()
virtual void	flush ()
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.
virtual	operator bool ()
virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.
virtual void	setAudioInfo (AudioInfo newInfo) override
	Defines the input AudioInfo.
void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)
size_t	write (const uint8_t *data, size_t len) override
virtual size_t	write (uint8_t ch) override
virtual void	writeSilence (size_t len)

Protected Member Functions
void	notifyAudioChange (AudioInfo info)
void	writeValue (int channel)
template<typename T >
void	writeValueT (int channel)

Static Protected Member Functions
static void	r2r_timer_callback (void *ptr)

Protected Attributes
int	_timeout = 10
NBuffer< uint8_t >	buffer {DEFAULT_BUFFER_SIZE, 0}
AudioInfo	cfg
bool	is_active = false
bool	is_notify_active = true
Vector< AudioInfoSupport * >	notify_vector
R2RConfig	rcfg
TimerAlarmRepeating	timer
SingleBuffer< uint8_t >	tmp {MAX_SINGLE_CHARS}
int	tmpPos = 0

Detailed Description

Output to R-2R DAC. You need to define the used digital pins in the configuration. Any number of bits is supported on max 2 channels. For a 4 bit single channel, you need to define 4 digital pins. see https://www.electronics-tutorials.ws/combination/r-2r-dac.html The default driver implementation uses Arduino digitalWrite(). You can provide your own optimized driver.

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, RTSPClient< TcpClient, UdpSocket >, Pipeline, and Pipeline::ModifyingStreamAdapter.

audioInfo()

virtual AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in AdapterPrintToAudioOutput, EncodedAudioOutput, and AdapterAudioStreamToAudioOutput.

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 >.

availableForWrite()

virtual int availableForWrite ( )

inlineoverridevirtualinherited

Reimplemented from Print.

Reimplemented in AudioESP32ULP, RTSPOutput< Platform >, EncodedAudioOutput, AudioServerEx, AudioSyncWriter, AdapterAudioStreamToAudioOutput, CsvOutput< T >, MemoryOutput, and PWMAudioOutput.

begin() [1/3]

bool begin ( )

inlineoverridevirtual

Reimplemented from AudioOutput.

begin() [2/3]

virtual bool begin ( AudioInfo  info )

inlinevirtualinherited

Reimplemented in AudioESP32ULP, RTSPOutput< Platform >, RTTTLOutput< T >, ChannelsSelectOutput, CsvOutput< T >, and EncodedAudioOutput.

begin() [3/3]

bool begin ( R2RConfig  c )

inline

clearNotifyAudioChange()

virtual void clearNotifyAudioChange ( )

inlinevirtualinherited

Deletes all change notify subscriptions.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

defaultConfig()

R2RConfig defaultConfig ( )

inline

end()

virtual void end ( )

inlinevirtualinherited

Reimplemented in AudioESP32ULP, AudioServerEx, AudioSyncWriter, RTSPOutput< Platform >, PitchShiftOutput< T, BufferT >, MetaDataOutput, EncodedAudioOutput, OggContainerOutput, AdapterAudioStreamToAudioOutput, MetaDataFilter, and PWMAudioOutput.

flush()

virtual void flush ( )

inlinevirtualinherited

Reimplemented from Print.

Reimplemented in MultiOutput, and HexDumpOutput.

isDeletable()

virtual bool isDeletable ( )

inlinevirtualinherited

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

Reimplemented in AdapterPrintToAudioOutput, and AdapterAudioStreamToAudioOutput.

isNotifyActive()

bool isNotifyActive ( )

inlineinherited

Checks if the automatic AudioInfo update is active.

notifyAudioChange()

void notifyAudioChange ( AudioInfo  info )

inlineprotectedinherited

operator bool()

virtual operator bool ( )

inlinevirtualinherited

Reimplemented in RTSPOutput< Platform >, EncodedAudioOutput, and AdapterAudioStreamToAudioOutput.

r2r_timer_callback()

static void r2r_timer_callback ( void *  ptr )

inlinestaticprotected

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()

virtual void setAudioInfo ( AudioInfo  info )

inlineoverridevirtualinherited

Defines the input AudioInfo.

Implements AudioInfoSupport.

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

setNotifyActive()

void setNotifyActive ( bool  flag )

inlineinherited

Deactivate/Reactivate automatic AudioInfo updates: (default is active)

write() [1/2]

size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtual

Implements AudioOutput.

write() [2/2]

virtual size_t write ( uint8_t  ch )

inlineoverridevirtualinherited

Reimplemented in MetaDataOutput, and MultiOutput.

writeSilence()

virtual void writeSilence ( size_t  len )

inlinevirtualinherited

Writes n 0 values (= silence)

Parameters

len

writeValue()

void writeValue ( int  channel )

inlineprotected

writeValueT()

template<typename T >

void writeValueT ( int  channel )

inlineprotected

Member Data Documentation

_timeout

int _timeout = 10

protectedinherited

buffer

NBuffer<uint8_t> buffer {DEFAULT_BUFFER_SIZE, 0}

protected

cfg

AudioInfo cfg

protectedinherited

is_active

bool is_active = false

protectedinherited

is_notify_active

bool is_notify_active = true

protectedinherited

notify_vector

Vector<AudioInfoSupport*> notify_vector

protectedinherited

rcfg

R2RConfig rcfg

protected

timer

TimerAlarmRepeating timer

protected

tmp

SingleBuffer<uint8_t> tmp {MAX_SINGLE_CHARS}

protectedinherited

tmpPos

int tmpPos = 0

protectedinherited

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

• src/AudioTools/AudioLibs/R2ROutput.h