SineFromTable< T > Class Template Reference

A sine generator based on a table. The table is created using degrees where one full wave is 360 degrees. More...

#include <SoundGenerator.h>

Inheritance diagram for SineFromTable< T >:

Public Member Functions
	SineFromTable (float amplitude=32767.0)
virtual AudioInfo	audioInfo ()
	Provides the AudioInfo.
bool	begin ()
virtual bool	begin (AudioInfo info)
bool	begin (AudioInfo info, float frequency)
bool	begin (int channels, int sample_rate, uint16_t frequency=0)
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.
void	setAmplitude (float amplitude)
	Defines the new amplitude (volume)
virtual void	setAudioInfo (AudioInfo info)
	Defines/updates the AudioInfo.
void	setFrequency (float freq)
	Abstract method: not implemented! Just provides an error message...
void	setMaxAmplitudeStep (float step)

Protected Member Functions
T	interpolate (float angle)
T	map (T x, T in_min, T in_max, T out_min, T out_max)
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)
void	updateAmplitudeInSteps ()

Protected Attributes
bool	active = false
bool	activeWarningIssued = false
float	amplitude
float	amplitude_to_be
float	angle = 0.0f
float	base_frequency = 1.0f
AudioInfo	info
bool	is_first = true
float	max_amplitude_step = 50.0f
RingBuffer< uint8_t >	ring_buffer {0}
float	step = 1.0f
float	step_new = 1.0f
const float	values [181]

Detailed Description

template<class T>
class audio_tools::SineFromTable< T >

A sine generator based on a table. The table is created using degrees where one full wave is 360 degrees.

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

isActive()

virtual bool isActive ( )

inlinevirtualinherited

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

setMaxAmplitudeStep()

void setMaxAmplitudeStep ( float  step )

inline

To avoid pops we do not allow to big amplitude changes at once and spread them over time

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

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