VolumeStream Class Reference

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) override
	Defines/Changes the output target.
void	setOutput (Stream &in)
	same as setStream
void	setStream (Print &out)
	same as set Output
void	setStream (Stream &in) override
	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.
void	setWriteBufferSize (int size)
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 ()
	Refill small read buffer (e.g. 8 bytes) to avoid single byte reads when calling read()
void	resizeVectors (int channels)
	Resizes the vectors.
void	setVolumeStreamConfig (VolumeStreamConfig cfg)
	Stores the local variable and calculates some max values.
VolumeStreamConfig	toVolumeStreamConfig (AudioInfo cfg)
	Provides a VolumeStreamConfig based on a AudioInfo.
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}
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
int	write_buffer_size = MAX_SINGLE_CHARS

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

Constructor & Destructor Documentation

VolumeStream() [1/5]

VolumeStream ( )

default

Default Constructor.

VolumeStream() [2/5]

VolumeStream ( Print &  out )

inline

Constructor which assigns Print output.

VolumeStream() [3/5]

VolumeStream ( Stream &  in )

inline

Constructor which assigns Stream input or output.

VolumeStream() [4/5]

VolumeStream ( AudioOutput &  out )

inline

Constructor which assigns Print output.

VolumeStream() [5/5]

VolumeStream ( AudioStream &  io )

inline

Constructor which assigns Stream input or output.

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.

applyVolume()

void applyVolume ( const uint8_t *  buffer, size_t  size  )

inlineprotected

applyVolume16()

void applyVolume16 ( int16_t *  data, size_t  size  )

inlineprotected

applyVolume24()

void applyVolume24 ( int24_t *  data, size_t  size  )

inlineprotected

applyVolume32()

void applyVolume32 ( int32_t *  data, size_t  size  )

inlineprotected

audioInfo()

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()

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() [1/3]

bool begin ( )

inlineoverridevirtual

Reimplemented from BaseStream.

begin() [2/3]

bool begin ( AudioInfo  cfg )

inline

begin() [3/3]

bool begin ( VolumeStreamConfig  cfg )

inline

starts the processing

clearNotifyAudioChange()

virtual void clearNotifyAudioChange ( )

inlinevirtualinherited

Deletes all change notify subscriptions.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

defaultConfig()

VolumeStreamConfig defaultConfig ( )

inline

end()

void end ( )

inlineoverridevirtual

Reimplemented from BaseStream.

factorForChannel()

float factorForChannel ( int  channel )

inlineprotected

flush()

virtual void flush ( )

inlineoverridevirtualinherited

Reimplemented from Print.

Reimplemented in PureDataStream, URLStreamBufferedT< T >, URLStreamBufferedT< ICYStream >, AudioStreamWrapper, ResampleStream, URLStream, BufferedTaskStream, I2SStream, MemoryStream, RingBufferStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, and BufferedStream.

isAllChannelsFullVolume()

bool isAllChannelsFullVolume ( )

inlineprotected

isNotifyActive()

bool isNotifyActive ( )

inlineinherited

Checks if the automatic AudioInfo update is active.

isVolumeUpdate()

bool isVolumeUpdate ( )

inlineprotected

not_supported()

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

inlineprotectedvirtualinherited

notifyAudioChange()

void notifyAudioChange ( AudioInfo  info )

inlineprotectedinherited

operator bool()

virtual operator bool ( )

inlinevirtualinherited

Reimplemented in A2DPStream, ICYStreamT< T >, AudioBLEStream, AudioFFTBase, PortAudioStream, URLStream, I2SStream, AdapterAudioOutputToAudioStream, TimedStream, MemoryStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, and Pipeline.

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.

readSilence()

virtual size_t readSilence ( uint8_t *  buffer, size_t  length  )

inlinevirtualinherited

Source to generate silence: just sets the buffer to 0.

refillReadBuffer()

void refillReadBuffer ( )

inlineprotectedinherited

Refill small read buffer (e.g. 8 bytes) to avoid single byte reads when calling read()

removeNotifyAudioChange()

virtual bool removeNotifyAudioChange ( AudioInfoSupport &  bi )

inlinevirtualinherited

Removes a target in order not to be notified about audio changes.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

resetVolumeControl()

void resetVolumeControl ( )

inline

Resets the volume control to use the standard logic.

resizeVectors()

void resizeVectors ( int  channels )

inlineprotected

Resizes the vectors.

setAudioInfo()

void setAudioInfo ( AudioInfo  cfg )

inlineoverridevirtual

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

Reimplemented from AudioStream.

setNotifyActive()

void setNotifyActive ( bool  flag )

inlineinherited

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

setOutput() [1/2]

void setOutput ( Print &  out )

inlineoverridevirtual

Defines/Changes the output target.

Implements ModifyingStream.

setOutput() [2/2]

void setOutput ( Stream &  in )

inline

same as setStream

setStream() [1/2]

void setStream ( Print &  out )

inline

same as set Output

setStream() [2/2]

void setStream ( Stream &  in )

inlineoverridevirtual

Defines/Changes the input & output.

Implements ModifyingStream.

setVolume() [1/2]

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.

setVolume() [2/2]

bool setVolume ( float  vol, int  channel  )

inline

Sets the volume for one channel.

setVolumeControl()

void setVolumeControl ( VolumeControl &  vc )

inline

Defines the volume control logic.

setVolumeStreamConfig()

void setVolumeStreamConfig ( VolumeStreamConfig  cfg )

inlineprotected

Stores the local variable and calculates some max values.

setWriteBufferSize()

void setWriteBufferSize ( int  size )

inlineinherited

toVolumeStreamConfig()

VolumeStreamConfig toVolumeStreamConfig ( AudioInfo  cfg )

inlineprotected

Provides a VolumeStreamConfig based on a AudioInfo.

volume() [1/2]

float volume ( )

inlineoverridevirtual

Provides the current (avg) volume accross all channels.

Reimplemented from VolumeSupport.

volume() [2/2]

float volume ( int  channel )

inline

Provides the current volume setting for the indicated channel.

volumeControl()

VolumeControl & volumeControl ( )

inlineprotected

volumeValue()

float volumeValue ( float  vol )

inlineprotected

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 MemoryStream, AudioStreamWrapper, BufferedTaskStream, RingBufferStream, BufferedStream, and URLStream.

writeSilence()

virtual void writeSilence ( size_t  len )

inlinevirtualinherited

Writes len bytes of silence (=0).

Member Data Documentation

_timeout

int _timeout = 10

protectedinherited

cached_volume

CachedVolumeControl cached_volume {pot_vc}

protected

factor_for_channel

Vector<float> factor_for_channel

protected

info

VolumeStreamConfig info

protected

is_notify_active

bool is_notify_active = true

protectedinherited

is_started

bool is_started = false

protected

linear_vc

LinearVolumeControl linear_vc {true}

protected

max_value

float max_value = 32767

protected

notify_vector

Vector<AudioInfoSupport*> notify_vector

protectedinherited

p_in

Stream* p_in =nullptr

protected

p_out

Print* p_out =nullptr

protected

pot_vc

SimulatedAudioPot pot_vc

protected

tmp_in

RingBuffer<uint8_t> tmp_in {0}

protectedinherited

tmp_out

RingBuffer<uint8_t> tmp_out {0}

protectedinherited

volume_value

float volume_value = 1.0f

protectedinherited

volume_values

Vector<float> volume_values

protected

write_buffer_size

int write_buffer_size = MAX_SINGLE_CHARS

protectedinherited

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

• src/AudioTools/CoreAudio/VolumeStream.h