MixerStream is mixing the input from Multiple Input Streams. All streams must have the same audo format (sample rate, channels, bits per sample). More...

#include <AudioStreams.h>

Inheritance diagram for InputMixer< T >:

Public Member Functions
void	add (Stream &in, int weight=100)
	Adds a new input stream.

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	available () override

virtual int	availableForWrite () override

virtual bool	begin ()

virtual bool	begin (AudioInfo info)

virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.

void	end () override
	Remove all input streams.

virtual void	flush () override

bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.

virtual	operator bool ()

size_t	readBytes (uint8_t *data, size_t len) override
	Provides the data from all streams mixed together.

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	set (int channel, Stream &in)
	Replaces a stream at the indicated channel.

virtual void	setAudioInfo (AudioInfo newInfo) override
	Defines the input AudioInfo.

void	setLimitToAvailableData (bool flag)

void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)

void	setRetryCount (int retry)

void	setWeight (int channel, int weight)

int	size ()
	Number of stremams to which are mixed together.

virtual 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)
	Writes len bytes of silence (=0).

Protected Member Functions
int	availableBytes ()
	Provides the available bytes from the first stream with data.

virtual int	not_supported (int out, const char *msg="")

void	notifyAudioChange (AudioInfo info)

int	readBytesVector (T *p_data, int byteCount)
	mixing using a vector of samples

void	refillReadBuffer ()

void	resultAdd (float fact)

void	resultClear ()

Protected Attributes
int	_timeout = 10

Vector< T >	current_vect

int	frame_size = 4

AudioInfo	info

bool	is_notify_active = true

bool	limit_available_data = false

Vector< AudioInfoSupport * >	notify_vector

Vector< int >	result_vect

int	retry_count = 5

Vector< Stream * >	streams {0}

RingBuffer< uint8_t >	tmp_in {0}

RingBuffer< uint8_t >	tmp_out {0}

int	total_weights = 0

Vector< int >	weights {0}

Detailed Description

template<typename T>
class audio_tools::InputMixer< T >

MixerStream is mixing the input from Multiple Input Streams. All streams must have the same audo format (sample rate, channels, bits per sample).

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

◆ audioInfo()

virtual AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in JupyterAudioT< T >, MozziStream, TimerCallbackAudioStream, 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, and ResampleStream.

◆ available()

virtual int available ( )

inlineoverridevirtualinherited

Reimplemented from Stream.

Reimplemented in AudioKitStream, A2DPStream, AudioFFTBase, HLSStreamT< URLStream >, I2SCodecStream, TfLiteAudioStream, UDPStream, ICYStreamT< T >, BufferedTaskStream, I2SStream, TimedStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, BufferedStream, ConverterStream< T >, InputMerge< T >, Pipeline::ModifyingStreamAdapter, and VolumeStream.

◆ availableForWrite()

virtual int availableForWrite ( )

inlineoverridevirtualinherited

Reimplemented from Print.

Reimplemented in UDPStream, A2DPStream, AudioFFTBase, I2SCodecStream, AbstractURLStream, URLStreamESP32, I2SStream, MeasuringStream, ProgressStream, and VolumeStream.

◆ begin()

virtual bool begin ( )

inlinevirtualinherited

Reimplemented in AudioOutputWithCallback, HLSStreamT< URLStream >, SPDIFOutput, VS1053Stream, WM8960Stream, ESPNowStream, TimerCallbackAudioStream, QueueStream< T >, QueueStream< uint8_t >, DynamicMemoryStream, AudioFFTBase, AnalogAudioArduino, AnalogAudioStream, MemoryStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, FormatConverterStream, and Pipeline.

◆ end()

template<typename T >

void end ( )

inlineoverridevirtual

Remove all input streams.

Reimplemented from BaseStream.

◆ flush()

virtual void flush ( )

inlineoverridevirtualinherited

Reimplemented from Print.

Reimplemented in ResampleStream, BufferedTaskStream, and BufferedStream.

◆ operator bool()

virtual operator bool ( )

inlinevirtualinherited

Reimplemented in A2DPStream, Pipeline, I2SStream, and MemoryStream.

◆ readBytes()

template<typename T >

size_t readBytes	(	uint8_t *	data,
		size_t	len
	)

inlineoverridevirtual

Provides the data from all streams mixed together.

Reimplemented from AudioStream.

◆ setAudioInfo()

virtual void setAudioInfo ( AudioInfo info )

inlineoverridevirtualinherited

◆ setLimitToAvailableData()

template<typename T >

void setLimitToAvailableData ( bool flag )

inline

Limit the copy to the available data of all streams: stops to provide data when any stream has ended

◆ setRetryCount()

template<typename T >

void setRetryCount ( int retry )

inline

Defines the maximum number of retrys to get data from an input before we abort the read and provide empty data

◆ setWeight()

template<typename T >

void setWeight	(	int	channel,
		int	weight
	)

inline

Dynamically update the new weight for the indicated channel: If you set it to 0 it is muted (and the stream is not read any more). We recommend to use values between 1 and 100

◆ write() [1/2]

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

inlineoverridevirtualinherited

◆ write() [2/2]

virtual size_t write ( uint8_t ch )

inlineoverridevirtualinherited

Reimplemented in BufferedTaskStream, and BufferedStream.

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

src/AudioTools/CoreAudio/AudioStreams.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

◆ addNotifyAudioChange()

◆ audioInfo()

◆ audioInfoOut()

◆ available()

◆ availableForWrite()

◆ begin()

◆ end()

◆ flush()

◆ operator bool()

◆ readBytes()

◆ setAudioInfo()

◆ setLimitToAvailableData()

◆ setRetryCount()

◆ setWeight()

◆ write() [1/2]

◆ write() [2/2]