AudioUtil Class Reference

Collection of Audio Utility functions and classes. More...

Classes
class	GeneratorPusher
	IAudioPusher that provides a constant tone signal. More...
class	GeneratorReader
interface	ILevelMeter
	Audio Level Metering interface. More...
interface	IVoiceDetector
	Voice Activity Detector interface. More...
class	LevelMeter
	Audio Level Meter. More...
class	LevelMeterDummy
	Dummy Audio Level Meter that doesn't actually do anything. More...
class	LevelMeterFloat
	LevelMeter specialization for float audio. More...
class	LevelMeterShort
	LevelMeter specialization for short audio. More...
class	Resampler
	Sample-rate conversion Audio Processor. More...
class	TempoUp
class	ToneAudioPusher
	IAudioPusher that provides a constant tone signal. More...
class	ToneAudioReader
	IAudioReader that provides a constant tone signal. More...
class	VoiceDetector
	Simple voice activity detector triggered by signal level. More...
class	VoiceDetectorCalibration
	Calibration Utility for Voice Detector More...
class	VoiceDetectorDummy
	Dummy VoiceDetector that doesn't actually do anything. More...
class	VoiceDetectorFloat
	VoiceDetector specialization for float audio. More...
class	VoiceDetectorShort
	VoiceDetector specialization for float audio. More...
class	VoiceLevelDetectCalibrate
	Utility Audio Processor Voice Detection Calibration. More...
class	WaveformAudioPusher
	IAudioPusher that provides the given waveform. More...
class	WaveformAudioReader
	IAudioReader that provides the given waveform. More...

Static Public Member Functions
static int	ToneToBuf< T > (T[] buf, long timeSamples, int channels, double amp, double k, double phaseMod=0)
static int	ToneToBuf< T > (T[] buf, int offset, int length, long timeSamples, int channels, double amp, double k, double phaseMod=0)
static int	WaveformToBuf< T > (T[] buf, T[] waveform, long timePos)
static void	Resample< T > (T[] src, T[] dst, int dstCount, int channels)
	Resample audio data so that the complete src buffer fits into dstCount samples in the dst buffer. More...
static void	Resample< T > (T[] src, int srcOffset, int srcCount, T[] dst, int dstOffset, int dstCount, int channels)
static void	Resample< T > (T[] src, int srcOffset, int srcCount, int srcChannels, T[] dst, int dstOffset, int dstCount, int dstChannels)
static void	ResampleAndConvert (short[] src, float[] dst, int dstCount, int channels)
	Resample audio data so that the complete src buffer fits into dstCount samples in the dst buffer, and convert short to float samples along the way. More...
static void	ResampleAndConvert (float[] src, short[] dst, int dstCount, int channels)
	Resample audio data so that the complete src buffer fits into dstCount samples in the dst buffer, and convert float to short samples along the way. More...
static void	Convert (float[] src, short[] dst, int dstCount)
	Convert audio buffer from float to short samples. More...
static void	Convert (short[] src, float[] dst, int dstCount)
	Convert audio buffer from short to float samples. More...
static void	ForceToStereo< T > (T[] src, T[] dst, int srcChannels)
	Convert audio buffer with arbitrary number of channels to stereo. More...

Detailed Description

Collection of Audio Utility functions and classes.

Member Function Documentation

Convert() [1/2]

static void Convert ( float[]  src, short[]  dst, int  dstCount  )

static

Convert audio buffer from float to short samples.

Parameters

src	Source buffer.
dst	Destination buffer.
dstCount	Size of destination buffer (in total samples), source buffer must be of same length or longer.

Convert() [2/2]

static void Convert ( short[]  src, float[]  dst, int  dstCount  )

static

Convert audio buffer from short to float samples.

Parameters

src	Source buffer.
dst	Destination buffer.
dstCount	Size of destination buffer (in total samples), source buffer must be of same length or longer.

ForceToStereo< T >()

static void ForceToStereo< T > ( T[]  src, T[]  dst, int  srcChannels  )

static

Convert audio buffer with arbitrary number of channels to stereo.

For mono sources (srcChannels==1), the signal will be copied to both Left and Right stereo channels. For all others, the first two available channels will be used, any other channels will be discarded.

Parameters

src	Source buffer.
dst	Destination buffer.
srcChannels	Number of (interleaved) channels in src.

Resample< T >()

static void Resample< T > ( T[]  src, T[]  dst, int  dstCount, int  channels  )

static

Resample audio data so that the complete src buffer fits into dstCount samples in the dst buffer.

This implements a primitive nearest-neighbor resampling algorithm for an arbitrary number of channels.

Parameters

src	Source buffer.
dst	Destination buffer.
dstCount	Target size of destination buffer (in samples per channel).
channels	Number of channels in the signal (1=mono, 2=stereo). Must be > 0.

ResampleAndConvert() [1/2]

static void ResampleAndConvert ( float[]  src, short[]  dst, int  dstCount, int  channels  )

static

Resample audio data so that the complete src buffer fits into dstCount samples in the dst buffer, and convert float to short samples along the way.

This implements a primitive nearest-neighbor resampling algorithm for an arbitrary number of channels.

Parameters

src	Source buffer.
dst	Destination buffer.
dstCount	Target size of destination buffer (in samples per channel).
channels	Number of channels in the signal (1=mono, 2=stereo). Must be > 0.

ResampleAndConvert() [2/2]

static void ResampleAndConvert ( short[]  src, float[]  dst, int  dstCount, int  channels  )

static

Resample audio data so that the complete src buffer fits into dstCount samples in the dst buffer, and convert short to float samples along the way.

This implements a primitive nearest-neighbor resampling algorithm for an arbitrary number of channels.

Parameters

src	Source buffer.
dst	Destination buffer.
dstCount	Target size of destination buffer (in samples per channel).
channels	Number of channels in the signal (1=mono, 2=stereo). Must be > 0.