GeneratorFromStream< T > Class Template Reference

An Adapter Class which lets you use any Stream as a Generator. More...

#include <SoundGenerator.h>

Inheritance diagram for GeneratorFromStream< T >:

Public Member Functions
	GeneratorFromStream (Stream &input, int channels=1, float volume=1.0)
	Constructs a new Generator from a Stream object that can be used e.g. as input for AudioEffectss.
virtual AudioInfo	audioInfo ()
	Provides the AudioInfo.
virtual bool	begin ()
virtual bool	begin (AudioInfo info)
virtual AudioInfo	defaultConfig ()
	Provides the default configuration.
virtual void	end ()
	ends the processing
virtual bool	isActive ()
virtual size_t	readBytes (uint8_t *data, size_t len)
	Provides the data as byte array with the requested number of channels.
T	readSample ()
	Provides a single sample from the stream.
virtual void	setAudioInfo (AudioInfo info)
	Defines/updates the AudioInfo.
void	setChannels (int channels)
virtual void	setFrequency (float frequency)
	Abstract method: not implemented! Just provides an error message...
void	setStream (Stream &input)
	(Re-)Assigns a stream to the Adapter class
virtual bool	setVolume (float volume)
	define the actual volume in the range of 0.0f to 1.0f
virtual float	volume ()
	provides the actual volume in the range of 0.0f to 1.0f

Protected Member Functions
size_t	readBytesFrames (uint8_t *buffer, size_t lengthBytes, int frames, int channels)
size_t	readBytesFromBuffer (uint8_t *buffer, size_t lengthBytes, int frame_size, int channels)

Protected Attributes
bool	active = false
bool	activeWarningIssued = false
int	channels = 1
AudioInfo	info
float	maxValue
Stream *	p_stream = nullptr
RingBuffer< uint8_t >	ring_buffer {0}
float	volume_value = 1.0f

Detailed Description

template<class T = int16_t>
class audio_tools::GeneratorFromStream< T >

An Adapter Class which lets you use any Stream as a Generator.

Author

Phil Schatzmann

Copyright

GPLv3

Template Parameters

T

Constructor & Destructor Documentation

GeneratorFromStream()

template<class T = int16_t>

GeneratorFromStream ( Stream &  input, int  channels = 1, float  volume = 1.0  )

inline

Constructs a new Generator from a Stream object that can be used e.g. as input for AudioEffectss.

Parameters

input	Stream
channels	number of channels of the Stream
volume	factor my which the sample value is multiplied - default 1.0; Use it e.g. to reduce the volume (e.g. with 0.5)

Member Function Documentation

begin() [1/2]

template<class T = int16_t>

virtual bool begin ( )

inlinevirtualinherited

Reimplemented in GeneratorFromArray< T >, and GeneratorFixedValue< T >.

begin() [2/2]

template<class T = int16_t>

virtual bool begin ( AudioInfo  info )

inlinevirtualinherited

Reimplemented in STKGenerator< StkCls, T >, and STKGenerator< StkCls, int16_t >.

defaultConfig()

template<class T = int16_t>

virtual AudioInfo defaultConfig ( )

inlinevirtualinherited

Provides the default configuration.

Reimplemented in STKGenerator< StkCls, T >, STKGenerator< StkCls, int16_t >, SineWaveGenerator< T >, and SineWaveGenerator< int16_t >.

end()

template<class T = int16_t>

virtual void end ( )

inlinevirtualinherited

ends the processing

Reimplemented in GeneratorFromArray< T >.

isActive()

template<class T = int16_t>

virtual bool isActive ( )

inlinevirtualinherited

Checks if the begin method has been called - after end() isActive returns false

readSample()

template<class T = int16_t>

T readSample ( )

inlinevirtual

Provides a single sample from the stream.

Implements SoundGenerator< T >.

setAudioInfo()

template<class T = int16_t>

virtual void setAudioInfo ( AudioInfo  info )

inlinevirtualinherited

Defines/updates the AudioInfo.

Reimplemented in SineWaveGenerator< T >, and SineWaveGenerator< int16_t >.

setFrequency()

template<class T = int16_t>

virtual void setFrequency ( float  frequency )

inlinevirtualinherited

Abstract method: not implemented! Just provides an error message...

Reimplemented in SineFromTable< T >, STKGenerator< StkCls, T >, STKGenerator< StkCls, int16_t >, SineWaveGenerator< T >, and SineWaveGenerator< int16_t >.

setVolume()

virtual bool setVolume ( float  volume )

inlinevirtualinherited

define the actual volume in the range of 0.0f to 1.0f

Reimplemented in Maximilian, I2SCodecStream, VS1053Stream, VolumeStream, A2DPStream, and AudioPlayer.

volume()

virtual float volume ( )

inlinevirtualinherited

provides the actual volume in the range of 0.0f to 1.0f

Reimplemented in I2SCodecStream, VS1053Stream, AudioPlayer, and VolumeStream.

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

• src/AudioTools/CoreAudio/AudioEffects/SoundGenerator.h