/Users/richardeakin/projects/libsms/trunk/src/sineSynth.c File Reference

functions for synthesizing evolving sinusoids More...

#include "sms.h"

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Functions
static void	SinePhaSynth (sfloat fFreq, sfloat fMag, sfloat fPhase, SMS_Data *pLastFrame, sfloat *pFWaveform, int sizeBuffer, int iTrack)
	generate a sinusoid given two peaks, current and last
static void	SineSynth (sfloat fFreq, sfloat fMag, SMS_Data *pLastFrame, sfloat *pFBuffer, int sizeBuffer, int iTrack)
	generate a sinusoid given two frames, current and last
void	sms_sineSynthFrame (SMS_Data *pSmsData, sfloat *pFBuffer, int sizeBuffer, SMS_Data *pLastFrame, int iSamplingRate)
	generate all the sinusoids for a given frame

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Detailed Description

functions for synthesizing evolving sinusoids

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Function Documentation

static void SinePhaSynth	(	sfloat	fFreq,
		sfloat	fMag,
		sfloat	fPhase,
		SMS_Data *	pLastFrame,
		sfloat *	pFWaveform,
		int	sizeBuffer,
		int	iTrack
	)			[static]

generate a sinusoid given two peaks, current and last

it interpolation between phase values and magnitudes

Parameters:

	fFreq	current frequency
	fMag	current magnitude
	fPhase	current phase
	pLastFrame	stucture with values from last frame
	pFWaveform	pointer to output waveform
	sizeBuffer	size of the synthesis buffer
	iTrack	current track

References SMS_Data::pFSinAmp, SMS_Data::pFSinFreq, SMS_Data::pFSinPha, PI_2, sfloat, sms_dBToMag(), and TWO_PI.

Referenced by sms_sineSynthFrame().

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static void SineSynth	(	sfloat	fFreq,
		sfloat	fMag,
		SMS_Data *	pLastFrame,
		sfloat *	pFBuffer,
		int	sizeBuffer,
		int	iTrack
	)			[static]

generate a sinusoid given two frames, current and last

Parameters:

	fFreq	current frequency
	fMag	current magnitude
	pLastFrame	stucture with values from last frame
	pFBuffer	pointer to output waveform
	sizeBuffer	size of the synthesis buffer
	iTrack	current track

References SMS_Data::pFSinAmp, SMS_Data::pFSinFreq, SMS_Data::pFSinPha, sfloat, sms_dBToMag(), sms_random(), sms_sine(), and TWO_PI.

Referenced by sms_sineSynthFrame().

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void sms_sineSynthFrame	(	SMS_Data *	pSmsData,
		sfloat *	pFBuffer,
		int	sizeBuffer,
		SMS_Data *	pLastFrame,
		int	iSamplingRate
	)

generate all the sinusoids for a given frame

Parameters:

	pSmsData	SMS data for current frame
	pFBuffer	pointer to output waveform
	sizeBuffer	size of the synthesis buffer
	pLastFrame	SMS data from last frame
	iSamplingRate	sampling rate to synthesize for

References SMS_Data::nTracks, SMS_Data::pFSinAmp, SMS_Data::pFSinFreq, SMS_Data::pFSinPha, sfloat, SinePhaSynth(), SineSynth(), and TWO_PI.

Referenced by sms_analyze(), and sms_synthesize().

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