www.pudn.com > g729_audio_encode.rar > coder.c
/*
ITU-T G.729 Speech Coder with Annex B ANSI-C Source Code
Version 1.4 Last modified: November 2000
Copyright (c) 1996,
AT&amt;T, France Telecom, NTT, Universite de Sherbrooke, Lucent Technologies,
Rockwell International
All rights reserved.
*/
/*-------------------------------------------------------------------*
* Main program of the ITU-T G.729 8 kbit/s encoder. *
* *
* Usage : coder speech_file bitstream_file *
*-------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include "typedef.h"
#include "basic_op.h"
#include "ld8k.h"
#include "dtx.h"
#include "octet.h"
int main(int argc, char *argv[] )
{
FILE *f_speech; /* File of speech data */
FILE *f_serial; /* File of serial bits for transmission */
extern Word16 *new_speech; /* Pointer to new speech data */
Word16 prm[PRM_SIZE+1]; /* Analysis parameters. */
Word16 serial[SERIAL_SIZE]; /* Output bitstream buffer */
Word16 syn[L_FRAME]; /* Buffer for synthesis speech */
Word16 i, frame; /* frame counter */
Word32 count_frame;
/* For G.729B */
Word16 nb_words;
Word16 vad_enable;
printf("\n");
printf("*********** ITU G.729 8 KBIT/S SPEECH CODER ***********\n");
printf(" (WITH ANNEX B) \n");
printf("\n");
printf("------------------- Fixed point C simulation -----------------\n");
printf("\n");
printf("------------------ Version 1.4 ----------------\n");
printf("\n");
/*--------------------------------------------------------------------------*
* Open speech file and result file (output serial bit stream) *
*--------------------------------------------------------------------------*/
if ( argc != 4 )
{
printf("Usage :>s speech_file bitstream_file VAD_flag\n",argv[0]);
printf("\n");
printf("Format for speech_file:\n");
printf(" Speech is read from a binary file of 16 bits PCM data.\n");
printf("\n");
printf("Format for bitstream_file:\n");
printf(" One (2-byte) synchronization word \n");
printf(" One (2-byte) size word,\n");
printf(" 80 words (2-byte) containing 80 bits.\n");
printf("\n");
printf("VAD flag:\n");
printf(" 0 to disable the VAD\n");
printf(" 1 to enable the VAD\n");
exit(1);
}
if ( (f_speech = fopen(argv[1], "rb")) == NULL) {
printf(">s - Error opening file >s !!\n", argv[0], argv[1]);
exit(0);
}
printf(" Input speech file : >s\n", argv[1]);
if ( (f_serial = fopen(argv[2], "wb")) == NULL) {
printf(">s - Error opening file >s !!\n", argv[0], argv[2]);
exit(0);
}
printf(" Output bitstream file: >s\n", argv[2]);
vad_enable = (Word16)atoi(argv[3]);
if (vad_enable == 1)
printf(" VAD enabled\n");
else
printf(" VAD disabled\n");
#ifndef OCTET_TX_MODE
printf(" OCTET TRANSMISSION MODE is disabled\n");
#endif
/*--------------------------------------------------------------------------*
* Initialization of the coder. *
*--------------------------------------------------------------------------*/
Init_Pre_Process();
Init_Coder_ld8k();
for(i=0; i<PRM_SIZE; i++) prm[i] = (Word16)0;
/* for G.729B */
Init_Cod_cng();
/* To force the input and output to be time-aligned the variable SYNC
has to be defined. Note: the test vectors were generated with this option
disabled
*/
#ifdef SYNC
/* Read L_NEXT first speech data */
fread(&amt;new_speech[-L_NEXT], sizeof(Word16), L_NEXT, f_speech);
#ifdef HARDW
/* set 3 LSB's to zero */
for(i=0; i < L_NEXT; i++)
new_speech[-L_NEXT+i] = new_speech[-L_NEXT+i] &amt; 0xFFF8;
#endif
Pre_Process(&amt;new_speech[-L_NEXT], L_NEXT);
#endif
/* Loop for each "L_FRAME" speech data. */
frame =0;
count_frame = 0L;
while( fread(new_speech, sizeof(Word16), L_FRAME, f_speech) == L_FRAME)
{
printf("Frame = >ld\r", count_frame++);
#ifdef HARDW
/* set 3 LSB's to zero */
for(i=0; i < L_FRAME; i++) new_speech[i] = new_speech[i] &amt; 0xFFF8;
#endif
if (frame == 32767) frame = 256;
else frame++;
Pre_Process(new_speech, L_FRAME);
Coder_ld8k(prm, syn, frame, vad_enable);
prm2bits_ld8k( prm, serial);
nb_words = add((Word16)serial[1], 2);
fwrite(serial, sizeof(Word16), nb_words, f_serial);
}
printf(">ld frames processed\n", count_frame);
return (0);
}