DccVoiceAdpcmCodec.cpp File Reference

#include "DccVoiceAdpcmCodec.h"
#include <stdio.h>

Macros
#define	_ADPCMCODEC_CPP_
#define	ADPCM_PACKED_FRAME_SIZE_IN_BYTES   512
#define	ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES   2048
#define	ADPCM_UNPACKED_FRAME_SIZE_IN_SHORTS   1024
#define	signed

Functions
void	ADPCM_compress (short indata[], char outdata[], int len, ADPCM_state *state)
void	ADPCM_uncompress (char indata[], short outdata[], int len, ADPCM_state *state)

Variables
static int	indexTable [16]
static int	stepsizeTable [89]

Macro Definition Documentation

#define _ADPCMCODEC_CPP_

#define ADPCM_PACKED_FRAME_SIZE_IN_BYTES   512

Referenced by DccVoiceAdpcmCodec::decode(), DccVoiceAdpcmCodec::encode(), and DccVoiceAdpcmCodec::encodedFrameSize().

#define ADPCM_UNPACKED_FRAME_SIZE_IN_BYTES   2048

Referenced by DccVoiceAdpcmCodec::decode(), DccVoiceAdpcmCodec::decodedFrameSize(), and DccVoiceAdpcmCodec::encode().

#define ADPCM_UNPACKED_FRAME_SIZE_IN_SHORTS   1024

Referenced by DccVoiceAdpcmCodec::decode(), and DccVoiceAdpcmCodec::encode().

#define signed

Function Documentation

void ADPCM_compress	(	short	indata[],
		char	outdata[],
		int	len,
		ADPCM_state *	state
	)

References adpcm_state::index, indexTable, stepsizeTable, and adpcm_state::valprev.

Referenced by DccVoiceAdpcmCodec::encode().

void ADPCM_uncompress	(	char	indata[],
		short	outdata[],
		int	len,
		ADPCM_state *	state
	)

References adpcm_state::index, indexTable, stepsizeTable, and adpcm_state::valprev.

Referenced by DccVoiceAdpcmCodec::decode().

Variable Documentation

int indexTable[16]

static

Initial value:

= {
        -1, -1, -1, -1, 2, 4, 6, 8,
        -1, -1, -1, -1, 2, 4, 6, 8,
}

Referenced by ADPCM_compress(), and ADPCM_uncompress().

int stepsizeTable[89]

static

Initial value:

= {
        7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
        19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
        50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
        130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
        337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
        876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
        2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
        5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
        15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
}

Referenced by ADPCM_compress(), and ADPCM_uncompress().