ExitGames::Voice::AudioUtil Namespace Reference

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

Classes
class	ILevelMeter
	Audio Level Metering interface. More...
class	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	Resampler
class	TempoUp
class	ToneAudioPusher
	IAudioPusher 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	VoiceLevelDetectCalibrate
	Utility Audio Processor Voice Detection Calibration. More...

Functions
template<typename T >
void	resample (const Buffer< T > &srcBuf, Buffer< T > &dstBuf, int dstSamples, int channels)
	Resample audio data so that the complete src buffer fits into dstSamples in the dst buffer. The buffers contain audio with the same number of channels. More...
template<typename T >
void	resample (const Buffer< T > &srcBuf, int srcOffsetSamples, int srcSamples, Buffer< T > &dstBuf, int dstOffsetSamples, int dstSamples, int channels)
	Resample audio data with offsets and sizes specified for both src and dst buffers. The buffers contain audio with the same number of channels. More...
template<typename T >
void	resample (const Buffer< T > &srcBuf, int srcOffsetSamples, int srcSamples, int srcChannels, Buffer< T > &dstBuf, int dstOffsetSamples, int dstSamples, int dstChannels)
	Resample audio data with offsets and sizes specified for both src and dst buffers. More...
void	resampleAndConvert (const Buffer< short > &srcBuf, Buffer< float > &dstBuf, 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...
void	resampleAndConvert (const Buffer< float > &srcBuf, Buffer< short > &dstBuf, 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...
void	convert (const Buffer< float > &srcBuf, Buffer< short > &dstBuf, int dstCount)
	Convert audio buffer from float to short samples. More...
void	convert (const Buffer< short > &srcBuf, Buffer< float > &dstBuf, int dstCount)
	Convert audio buffer from short to float samples. More...
template<typename T >
void	forceToStereo (const Buffer< T > &srcBuf, Buffer< T > &dstBuf, int srcChannels)
	Convert audio buffer with arbitrary number of channels to stereo. More...
template<typename T >
static float	toneAmp (void)
template<>
float	toneAmp< float > (void)
template<>
float	toneAmp< short > (void)
template<typename T >
float	defaultThreshold (void)
template<>
float	defaultThreshold< float > (void)
template<>
float	defaultThreshold< short > (void)
template void	resample (const Buffer< float > &srcBuf, Buffer< float > &dstBuf, int dstSamples, int channels)
template void	resample (const Buffer< float > &srcBuf, int srcOffsetSamples, int srcSamples, Buffer< float > &dstBuf, int dstOffsetSamples, int dstSamples, int channels)
template void	resample (const Buffer< float > &srcBuf, int srcOffsetSamples, int srcSamples, int srcChannels, Buffer< float > &dstBuf, int dstOffsetSamples, int dstSamples, int dstChannels)
template void	resample (const Buffer< short > &srcBuf, Buffer< short > &dstBuf, int dstSamples, int channels)
template void	resample (const Buffer< short > &srcBuf, int srcOffsetSamples, int srcSamples, Buffer< short > &dstBuf, int dstOffsetSamples, int dstSamples, int channels)
template void	resample (const Buffer< short > &srcBuf, int srcOffsetSamples, int srcSamples, int srcChannels, Buffer< short > &dstBuf, int dstOffsetSamples, int dstSamples, int dstChannels)

Detailed Description

Collection of Audio Utility functions and classes.

AudioUtil

Function Documentation

resample() [1/3]

void resample	(	const Buffer< T > &	srcBuf,
		Buffer< T > &	dstBuf,
		int	dstSamples,
		int	channels
	)

Resample audio data so that the complete src buffer fits into dstSamples in the dst buffer. The buffers contain audio with the same number of channels.

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

Parameters

srcBuf	Source buffer.
dstBuf	Destination buffer.
dstSamples	Destination data size in samples.
channels	Number of audio channels.

resample() [2/3]

void resample	(	const Buffer< T > &	srcBuf,
		int	srcOffsetSamples,
		int	srcSamples,
		Buffer< T > &	dstBuf,
		int	dstOffsetSamples,
		int	dstSamples,
		int	channels
	)

Resample audio data with offsets and sizes specified for both src and dst buffers. The buffers contain audio with the same number of channels.

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

Parameters

srcBuf	Source buffer.
srcOffsetSamples	Source data offset in samples.
srcSamples	Source data size in samples.
dstBuf	Destination buffer.
dstOffsetSamples	Destination data offset in samples.
dstSamples	Destination data size in samples.
channels	Number of audio channels.

resample() [3/3]

void resample	(	const Buffer< T > &	srcBuf,
		int	srcOffsetSamples,
		int	srcSamples,
		int	srcChannels,
		Buffer< T > &	dstBuf,
		int	dstOffsetSamples,
		int	dstSamples,
		int	dstChannels
	)

Resample audio data with offsets and sizes specified for both src and dst buffers.

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

Parameters

srcBuf	Source buffer.
srcOffsetSamples	Source data offset in samples.
srcSamples	Source data size in samples.
srcChannels	Number of audio channels in source.
dstBuf	Destination buffer.
dstOffsetSamples	Destination data offset in samples.
dstSamples	Destination data size in samples.
dstChannels	Number of audio channels in destination.

resampleAndConvert() [1/2]

void resampleAndConvert	(	const Buffer< short > &	srcBuf,
		Buffer< float > &	dstBuf,
		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.

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

Parameters

srcBuf	Source buffer.
dstBuf	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]

void resampleAndConvert	(	const Buffer< float > &	srcBuf,
		Buffer< short > &	dstBuf,
		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.

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

Parameters

srcBuf	Source buffer.
dstBuf	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.

convert() [1/2]

void convert	(	const Buffer< float > &	srcBuf,
		Buffer< short > &	dstBuf,
		int	dstCount
	)

Convert audio buffer from float to short samples.

Parameters

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

convert() [2/2]

void convert	(	const Buffer< short > &	srcBuf,
		Buffer< float > &	dstBuf,
		int	dstCount
	)

Convert audio buffer from short to float samples.

Parameters

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

forceToStereo()

void forceToStereo	(	const Buffer< T > &	srcBuf,
		Buffer< T > &	dstBuf,
		int	srcChannels
	)

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

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