Adjust the volume of the related input or output: To work properly the class needs to know the bits per sample and number of channels! AudioChanges are forwareded to the related Print or Stream class. More...

#include <VolumeStream.h>

Inheritance diagram for VolumeStream:

Public Member Functions
	VolumeStream ()=default
	Default Constructor.

	VolumeStream (AudioOutput &out)
	Constructor which assigns Print output.

	VolumeStream (AudioStream &io)
	Constructor which assigns Stream input or output.

	VolumeStream (Print &out)
	Constructor which assigns Print output.

	VolumeStream (Stream &in)
	Constructor which assigns Stream input or output.

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
	Provides the nubmer of bytes we can write.

virtual int	availableForWrite () override
	Provides the nubmer of bytes we can write.

bool	begin () override

bool	begin (AudioInfo cfg)

bool	begin (VolumeStreamConfig cfg)
	starts the processing

virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.

VolumeStreamConfig	defaultConfig ()

void	end () override

virtual void	flush () override

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

virtual	operator bool ()

virtual size_t	readBytes (uint8_t *data, size_t len) override
	Read raw PCM audio data, which will be the input for the volume control.

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	resetVolumeControl ()
	Resets the volume control to use the standard logic.

void	setAudioInfo (AudioInfo cfg) override
	Detines the Audio info - The bits_per_sample are critical to work properly!

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

void	setOutput (Print &out)
	Defines/Changes the output target.

void	setOutput (Stream &in)
	same as setStream

void	setStream (Print &out)
	same as set Output

void	setStream (Stream &in)
	Defines/Changes the input & output.

bool	setVolume (float vol) override
	Defines the volume for all channels: needs to be in the range of 0 to 1.0 (if allow boost has not been set)

bool	setVolume (float vol, int channel)
	Sets the volume for one channel.

void	setVolumeControl (VolumeControl &vc)
	Defines the volume control logic.

float	volume () override
	Provides the current (avg) volume accross all channels.

float	volume (int channel)
	Provides the current volume setting for the indicated channel.

virtual size_t	write (const uint8_t *data, size_t len) override
	Writes raw PCM audio data, which will be the input for the volume control.

virtual size_t	write (uint8_t ch) override

virtual void	writeSilence (size_t len)
	Writes len bytes of silence (=0).

Protected Member Functions
void	applyVolume (const uint8_t *buffer, size_t size)

void	applyVolume16 (int16_t *data, size_t size)

void	applyVolume24 (int24_t *data, size_t size)

void	applyVolume32 (int32_t *data, size_t size)

float	factorForChannel (int channel)

bool	isAllChannelsFullVolume ()

bool	isVolumeUpdate ()

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

void	notifyAudioChange (AudioInfo info)

void	refillReadBuffer ()

VolumeStreamConfig	setupAudioInfo (AudioInfo cfg)
	Provides a VolumeStreamConfig based on a AudioInfo.

void	setupVectors ()
	Resizes the vectors.

void	setupVolumeStreamConfig (VolumeStreamConfig cfg)
	Stores the local variable and calculates some max values.

VolumeControl &	volumeControl ()

float	volumeValue (float vol)

Protected Attributes
int	_timeout = 10

CachedVolumeControl	cached_volume {pot_vc}

Vector< float >	factor_for_channel

VolumeStreamConfig	info

bool	is_notify_active = true

bool	is_started = false

LinearVolumeControl	linear_vc {true}

int	max_channels = 0

float	max_value = 32767

Vector< AudioInfoSupport * >	notify_vector

Stream *	p_in =nullptr

Print *	p_out =nullptr

SimulatedAudioPot	pot_vc

RingBuffer< uint8_t >	tmp_in {0}

RingBuffer< uint8_t >	tmp_out {0}

float	volume_value = 1.0f

Vector< float >	volume_values

Detailed Description

Adjust the volume of the related input or output: To work properly the class needs to know the bits per sample and number of channels! AudioChanges are forwareded to the related Print or Stream class.

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 ( )

inlineoverridevirtual

Provides the nubmer of bytes we can write.

Reimplemented from BaseStream.

◆ availableForWrite()

virtual int availableForWrite ( )

inlineoverridevirtual

Provides the nubmer of bytes we can write.

Reimplemented from BaseStream.

◆ begin()

bool begin ( )

inlineoverridevirtual

Reimplemented from BaseStream.

◆ end()

void end ( )

inlineoverridevirtual

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()

virtual size_t readBytes	(	uint8_t *	data,
		size_t	len
	)

inlineoverridevirtual

Read raw PCM audio data, which will be the input for the volume control.

Reimplemented from AudioStream.

◆ setAudioInfo()

void setAudioInfo ( AudioInfo cfg )

inlineoverridevirtual

Detines the Audio info - The bits_per_sample are critical to work properly!

Reimplemented from AudioStream.

◆ setOutput()

void setOutput ( Print & out )

inlinevirtual

Defines/Changes the output target.

Implements ModifyingStream.

◆ setStream()

void setStream ( Stream & in )

inlinevirtual

Defines/Changes the input & output.

Implements ModifyingStream.

◆ setVolume()

bool setVolume ( float vol )

inlineoverridevirtual

Defines the volume for all channels: needs to be in the range of 0 to 1.0 (if allow boost has not been set)

Reimplemented from VolumeSupport.

◆ volume()

float volume ( )

inlineoverridevirtual

Provides the current (avg) volume accross all channels.

Reimplemented from VolumeSupport.

◆ write() [1/2]

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

inlineoverridevirtual

Writes raw PCM audio data, which will be the input for the volume control.

Reimplemented from AudioStream.

◆ 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/VolumeStream.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()

◆ setOutput()

◆ setStream()

◆ setVolume()

◆ volume()

◆ write() [1/2]

◆ write() [2/2]