Class that does the time-stretch (tempo change) effect for the processed sound. More...

#include <TDStretch.h>

Inheritance diagram for soundtouch::TDStretch:

Public Member Functions
	TDStretch ()
virtual	~TDStretch ()
void *	operator new (size_t s)
	Operator 'new' is overloaded so that it automatically creates a suitable instance depending on if we've a MMX/SSE/etc-capable CPU available or not.
FIFOSamplePipe *	getOutput ()
	Returns the output buffer object.
FIFOSamplePipe *	getInput ()
	Returns the input buffer object.
void	setTempo (float newTempo)
	Sets new target tempo.
virtual void	clear ()
	Returns nonzero if there aren't any samples available for outputting.
void	clearInput ()
	Clears the input buffer.
void	setChannels (uint numChannels)
	Sets the number of channels, 1 = mono, 2 = stereo.
void	enableQuickSeek (BOOL enable)
	Enables/disables the quick position seeking algorithm.
BOOL	isQuickSeekEnabled () const
	Returns nonzero if the quick seeking algorithm is enabled.
void	setParameters (uint sampleRate, uint sequenceMS=DEFAULT_SEQUENCE_MS, uint seekwindowMS=DEFAULT_SEEKWINDOW_MS, uint overlapMS=DEFAULT_OVERLAP_MS)
	Sets routine control parameters.
void	getParameters (uint pSampleRate, uint pSequenceMs, uint pSeekWindowMs, uint pOverlapMs)
	Get routine control parameters, see setParameters() function.
virtual void	putSamples (const SAMPLETYPE *samples, uint numSamples)
	Adds 'numsamples' pcs of samples from the 'samples' memory position into the input of the object.
Static Public Member Functions
static TDStretch *	newInstance ()
	Use this function instead of "new" operator to create a new instance of this class.
Protected Member Functions
void	acceptNewOverlapLength (uint newOverlapLength)
	Set new overlap length parameter & reallocate RefMidBuffer if necessary.
virtual void	clearCrossCorrState ()
	clear cross correlation routine state if necessary
void	calculateOverlapLength (uint overlapMs)
	Calculates overlap period length in samples.
virtual LONG_SAMPLETYPE	calcCrossCorrMulti (const SAMPLETYPE mixingPos, const SAMPLETYPE compare) const
virtual LONG_SAMPLETYPE	calcCrossCorrStereo (const SAMPLETYPE mixingPos, const SAMPLETYPE compare) const
virtual LONG_SAMPLETYPE	calcCrossCorrMono (const SAMPLETYPE mixingPos, const SAMPLETYPE compare) const
virtual uint	seekBestOverlapPositionMulti (const SAMPLETYPE *refPos)
virtual uint	seekBestOverlapPositionMultiQuick (const SAMPLETYPE *refPos)
virtual uint	seekBestOverlapPositionStereo (const SAMPLETYPE *refPos)
virtual uint	seekBestOverlapPositionStereoQuick (const SAMPLETYPE *refPos)
virtual uint	seekBestOverlapPositionMono (const SAMPLETYPE *refPos)
virtual uint	seekBestOverlapPositionMonoQuick (const SAMPLETYPE *refPos)
uint	seekBestOverlapPosition (const SAMPLETYPE *refPos)
virtual void	overlapMulti (SAMPLETYPE output, const SAMPLETYPE input) const
virtual void	overlapStereo (SAMPLETYPE output, const SAMPLETYPE input) const
virtual void	overlapMono (SAMPLETYPE output, const SAMPLETYPE input) const
void	clearMidBuffer ()
void	overlap (SAMPLETYPE output, const SAMPLETYPE input, uint ovlPos) const
void	precalcCorrReference ()
void	precalcCorrReferenceMono ()
void	precalcCorrReferenceStereo ()
void	processNominalTempo ()
void	processSamples ()
	Changes the tempo of the given sound samples.
Protected Attributes
uint	channels
uint	sampleReq
float	tempo
SAMPLETYPE *	pMidBuffer
SAMPLETYPE *	pRefMidBuffer
SAMPLETYPE *	pRefMidBufferUnaligned
uint	midBufferLength
uint	overlapLength
uint	overlapDividerBits
uint	slopingDivider
uint	seekLength
uint	seekWindowLength
uint	maxOffset
float	nominalSkip
float	skipFract
FIFOSampleBuffer	outputBuffer
FIFOSampleBuffer	inputBuffer
BOOL	bQuickseek
BOOL	bMidBufferDirty
uint	sampleRate
uint	sequenceMs
uint	seekWindowMs
uint	overlapMs

Detailed Description

Class that does the time-stretch (tempo change) effect for the processed sound.

Definition at line 97 of file TDStretch.h.

Constructor & Destructor Documentation

TDStretch::TDStretch ( )

Definition at line 91 of file TDStretch.cpp.

Referenced by newInstance().

TDStretch::~TDStretch ( ) [virtual]

Definition at line 110 of file TDStretch.cpp.

Member Function Documentation

void TDStretch::acceptNewOverlapLength ( uint newOverlapLength ) [protected]

Set new overlap length parameter & reallocate RefMidBuffer if necessary.

Definition at line 764 of file TDStretch.cpp.

Referenced by calculateOverlapLength().

void TDStretch::clearCrossCorrState ( ) [protected, virtual]

clear cross correlation routine state if necessary

Reimplemented in soundtouch::TDStretchMMX.

Definition at line 609 of file TDStretch.cpp.

Referenced by seekBestOverlapPositionMono(), seekBestOverlapPositionMonoQuick(), seekBestOverlapPositionMulti(), seekBestOverlapPositionMultiQuick(), seekBestOverlapPositionStereo(), and seekBestOverlapPositionStereoQuick().

void TDStretch::calculateOverlapLength ( uint overlapMs ) [protected]

Calculates overlap period length in samples.

Integer version rounds overlap length to closest power of 2 for a divide scaling operation.

Definition at line 939 of file TDStretch.cpp.

Referenced by setParameters().

double TDStretch::calcCrossCorrMulti	(	const SAMPLETYPE *	mixingPos,
		const SAMPLETYPE *	compare
	)		const `[protected, virtual]`

Reimplemented in soundtouch::TDStretchMMX.

Definition at line 988 of file TDStretch.cpp.

Referenced by seekBestOverlapPositionMulti(), and seekBestOverlapPositionMultiQuick().

double TDStretch::calcCrossCorrStereo	(	const SAMPLETYPE *	mixingPos,
		const SAMPLETYPE *	compare
	)		const `[protected, virtual]`

Reimplemented in soundtouch::TDStretchMMX.

Definition at line 972 of file TDStretch.cpp.

Referenced by seekBestOverlapPositionStereo(), and seekBestOverlapPositionStereoQuick().

double TDStretch::calcCrossCorrMono	(	const SAMPLETYPE *	mixingPos,
		const SAMPLETYPE *	compare
	)		const `[protected, virtual]`

Definition at line 957 of file TDStretch.cpp.

Referenced by seekBestOverlapPositionMono(), and seekBestOverlapPositionMonoQuick().

uint TDStretch::seekBestOverlapPositionMulti ( const SAMPLETYPE * refPos ) [protected, virtual]

Definition at line 322 of file TDStretch.cpp.

Referenced by seekBestOverlapPosition().

uint TDStretch::seekBestOverlapPositionMultiQuick ( const SAMPLETYPE * refPos ) [protected, virtual]

Definition at line 362 of file TDStretch.cpp.

Referenced by seekBestOverlapPosition().

uint TDStretch::seekBestOverlapPositionStereo ( const SAMPLETYPE * refPos ) [protected, virtual]

Definition at line 418 of file TDStretch.cpp.

Referenced by seekBestOverlapPosition().

uint TDStretch::seekBestOverlapPositionStereoQuick ( const SAMPLETYPE * refPos ) [protected, virtual]

Definition at line 458 of file TDStretch.cpp.

Referenced by seekBestOverlapPosition().

uint TDStretch::seekBestOverlapPositionMono ( const SAMPLETYPE * refPos ) [protected, virtual]

Definition at line 515 of file TDStretch.cpp.

Referenced by seekBestOverlapPosition().

uint TDStretch::seekBestOverlapPositionMonoQuick ( const SAMPLETYPE * refPos ) [protected, virtual]

Definition at line 558 of file TDStretch.cpp.

Referenced by seekBestOverlapPosition().

uint TDStretch::seekBestOverlapPosition ( const SAMPLETYPE * refPos ) [protected]

Definition at line 245 of file TDStretch.cpp.

Referenced by processSamples().

void TDStretch::overlapMulti	(	SAMPLETYPE *	output,
		const SAMPLETYPE *	input
	)		const `[protected, virtual]`

Definition at line 917 of file TDStretch.cpp.

Referenced by overlap().

void TDStretch::overlapStereo	(	SAMPLETYPE *	output,
		const SAMPLETYPE *	input
	)		const `[protected, virtual]`

Reimplemented in soundtouch::TDStretchMMX.

Definition at line 899 of file TDStretch.cpp.

Referenced by overlap().

void TDStretch::overlapMono	(	SAMPLETYPE *	output,
		const SAMPLETYPE *	input
	)		const `[protected, virtual]`

Definition at line 189 of file TDStretch.cpp.

Referenced by overlap().

void TDStretch::clearMidBuffer ( ) [protected]

Definition at line 202 of file TDStretch.cpp.

Referenced by acceptNewOverlapLength(), clear(), clearInput(), and processNominalTempo().

void TDStretch::overlap	(	SAMPLETYPE *	output,
		const SAMPLETYPE *	input,
		uint	ovlPos
	)		const `[inline, protected]`

Definition at line 293 of file TDStretch.cpp.

Referenced by processNominalTempo(), and processSamples().

void TDStretch::precalcCorrReference ( ) [protected]

Definition at line 840 of file TDStretch.cpp.

Referenced by seekBestOverlapPositionMulti(), and seekBestOverlapPositionMultiQuick().

void TDStretch::precalcCorrReferenceMono ( ) [protected]

Definition at line 882 of file TDStretch.cpp.

Referenced by seekBestOverlapPositionMono(), and seekBestOverlapPositionMonoQuick().

void TDStretch::precalcCorrReferenceStereo ( ) [protected]

Definition at line 862 of file TDStretch.cpp.

Referenced by seekBestOverlapPositionStereo(), and seekBestOverlapPositionStereoQuick().

void TDStretch::processNominalTempo ( ) [protected]

Definition at line 653 of file TDStretch.cpp.

Referenced by processSamples().

void TDStretch::processSamples ( ) [protected]

Changes the tempo of the given sound samples.

Returns amount of samples returned in the "output" buffer. The maximum amount of samples that can be returned at a time is set by the 'set_returnBuffer_size' function.

Definition at line 684 of file TDStretch.cpp.

Referenced by putSamples().

void * TDStretch::operator new ( size_t s )

Operator 'new' is overloaded so that it automatically creates a suitable instance depending on if we've a MMX/SSE/etc-capable CPU available or not.

Definition at line 791 of file TDStretch.cpp.

TDStretch * TDStretch::newInstance ( ) [static]

Use this function instead of "new" operator to create a new instance of this class.

This function automatically chooses a correct feature set depending on if the CPU supports MMX/SSE/etc extensions.

Definition at line 799 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::SoundTouch().

FIFOSamplePipe* soundtouch::TDStretch::getOutput ( ) [inline]

Returns the output buffer object.

Definition at line 184 of file TDStretch.h.

Referenced by soundtouch::SoundTouch::calcEffectiveRateAndTempo().

FIFOSamplePipe* soundtouch::TDStretch::getInput ( ) [inline]

Returns the input buffer object.

Definition at line 187 of file TDStretch.h.

Referenced by soundtouch::SoundTouch::calcEffectiveRateAndTempo(), and soundtouch::SoundTouch::numUnprocessedSamples().

void TDStretch::setTempo ( float newTempo )

Sets new target tempo.

Normal tempo = 'SCALE', smaller values represent slower tempo, larger faster tempo.

Definition at line 617 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::calcEffectiveRateAndTempo(), setParameters(), and TDStretch().

void TDStretch::clear ( void ) [virtual]

Returns nonzero if there aren't any samples available for outputting.

Implements FIFOSamplePipe.

Definition at line 220 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::clear().

void TDStretch::clearInput ( )

Clears the input buffer.

Definition at line 212 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::flush().

void TDStretch::setChannels ( uint numChannels )

Sets the number of channels, 1 = mono, 2 = stereo.

Definition at line 636 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::setChannels().

void TDStretch::enableQuickSeek ( BOOL enable )

Enables/disables the quick position seeking algorithm.

Zero to disable, nonzero to enable

Definition at line 231 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::setSetting().

BOOL TDStretch::isQuickSeekEnabled ( ) const

Returns nonzero if the quick seeking algorithm is enabled.

Definition at line 238 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::getSetting().

void TDStretch::setParameters	(	uint	sampleRate,
		uint	sequenceMS = `DEFAULT_SEQUENCE_MS`,
		uint	seekwindowMS = `DEFAULT_SEEKWINDOW_MS`,
		uint	overlapMS = `DEFAULT_OVERLAP_MS`
	)

Sets routine control parameters.

These control are certain time constants defining how the sound is stretched to the desired duration. 'sampleRate' = sample rate of the sound 'sequenceMS' = one processing sequence length in milliseconds 'seekwindowMS' = seeking window length for scanning the best overlapping position 'overlapMS' = overlapping length

Parameters:

sampleRate	Samplerate of sound being processed (Hz)
sequenceMS	Single processing sequence length (ms)
seekwindowMS	Offset seeking window length (ms)
overlapMS	Sequence overlapping length (ms)

Definition at line 139 of file TDStretch.cpp.

Referenced by soundtouch::SoundTouch::setSampleRate(), soundtouch::SoundTouch::setSetting(), and TDStretch().