MpAudioUtils.h File Reference

#include <os/OsDefs.h>
#include <os/OsStatus.h>
#include <utl/UtlString.h>
#include "mp/MpTypes.h"

Include dependency graph for MpAudioUtils.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions
void	ConvertUnsigned8ToSigned16 (unsigned char *in_buffer, MpAudioSample *out_buffer, int numBytesToConvert)
int	gcd (int a, int b)
	Returns the GCD of a and b. More...
int	reSample (char *charBuffer, int numBytes, int currentSampleRate, int newSampleRate)
	Downsamples from current rate to new rate. Doesn't upsample yet. More...
int	mergeChannels (char *charBuffer, int Size, int nTotalChannels)
	Merges two or more channels into one. More...
OsStatus	mergeWaveUrls (UtlString rSourceUrls[], UtlString &rDestFile)
	Works with 16bit wavs only. (for now) More...
OsStatus	mergeWaveFiles (UtlString rSourceFiles[], UtlString &rDestFile)
	Works with 16bit wavs only. (for now) More...
void	InitG711Tables ()
size_t	DecompressG711MuLaw (MpAudioSample *buffer, size_t length)
size_t	DecompressG711ALaw (MpAudioSample *buffer, size_t length)
unsigned char	ALawEncode2 (MpAudioSample s)
unsigned char	MuLawEncode2 (MpAudioSample s)
MpAudioSample	MuLawDecode2 (unsigned char ulaw)
MpAudioSample	ALawDecode2 (unsigned char alaw)

Function Documentation

void ConvertUnsigned8ToSigned16	(	unsigned char *	in_buffer,
		MpAudioSample *	out_buffer,
		int	numBytesToConvert
	)

int gcd	(	int	a,
		int	b
	)

Returns the GCD of a and b.

Don't pass it negative numbers or (0, 0)

int reSample	(	char *	charBuffer,
		int	numBytes,
		int	currentSampleRate,
		int	newSampleRate
	)

Downsamples from current rate to new rate. Doesn't upsample yet.

int mergeChannels	(	char *	charBuffer,
		int	Size,
		int	nTotalChannels
	)

Merges two or more channels into one.

Takes size in bytes as input. Returns new size in bytes

OsStatus mergeWaveUrls	(	UtlString	rSourceUrls[],
		UtlString &	rDestFile
	)

Works with 16bit wavs only. (for now)

OsStatus mergeWaveFiles	(	UtlString	rSourceFiles[],
		UtlString &	rDestFile
	)

Works with 16bit wavs only. (for now)

void InitG711Tables

(

)

size_t DecompressG711MuLaw	(	MpAudioSample *	buffer,
		size_t	length
	)

size_t DecompressG711ALaw	(	MpAudioSample *	buffer,
		size_t	length
	)

unsigned char ALawEncode2

(

MpAudioSample

s

)

unsigned char MuLawEncode2

(

MpAudioSample

s

)

MpAudioSample MuLawDecode2

(

unsigned char

ulaw

)

MpAudioSample ALawDecode2

(

unsigned char

alaw

)