void InitG729D_decoder()
{
Word16 i;
CODEC_MODE = 1; //@6.4kps mode
for ( i = 0; i < M; ++i)
synth_buf[i] = 0;
synth = synth_buf + M;
Init_Decod_ld8k();
Init_Post_Filter();
Init_Post_Process();
voicing = 60;
}
int main(int argc, char *argv[] )
{
Word16 synth_buf[L_FRAME+M], *synth; /* Synthesis */
Word16 parm[PRM_SIZE+1]; /* Synthesis parameters */
Word16 serial[SERIAL_SIZE]; /* Serial stream */
Word16 Az_dec[MP1*2], *ptr_Az; /* Decoded Az for post-filter */
Word16 T0_first; /* Pitch lag in 1st subframe */
Word16 pst_out[L_FRAME]; /* Postfilter output */
Word16 voicing; /* voicing from previous frame */
Word16 sf_voic; /* voicing for subframe */
Word16 i, frame;
FILE *f_syn, *f_serial;
printf("\n");
printf("*********** ITU G.729 8 KBIT/S SPEECH CODER ***********\n");
printf("\n");
printf("------------------- Fixed point C simulation -----------------\n");
printf("\n");
printf("----------------- Version 3.3 ----------------\n");
printf("\n");
/* Passed arguments */
if ( argc != 3 )
{
printf("Usage :%s bitstream_file outputspeech_file\n",argv[0]);
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("Format for outputspeech_file:\n");
printf(" Output is written to a binary file of 16 bits data.\n");
exit( 1 );
}
/* Open file for synthesis and packed serial stream */
if( (f_serial = fopen(argv[1],"rb") ) == NULL )
{
printf("%s - Error opening file %s !!\n", argv[0], argv[1]);
exit(0);
}
if( (f_syn = fopen(argv[2], "wb") ) == NULL )
{
printf("%s - Error opening file %s !!\n", argv[0], argv[2]);
exit(0);
}
printf("Input bitstream file : %s\n",argv[1]);
printf("Synthesis speech file : %s\n",argv[2]);
/*-----------------------------------------------------------------*
* Initialization of decoder *
*-----------------------------------------------------------------*/
for (i=0; i<M; i++) synth_buf[i] = 0;
synth = synth_buf + M;
Init_Decod_ld8k();
Init_Post_Filter();
Init_Post_Process();
voicing = 60;
/*-----------------------------------------------------------------*
* Loop for each "L_FRAME" speech data *
*-----------------------------------------------------------------*/
frame = 0;
while( fread(serial, sizeof(Word16), SERIAL_SIZE, f_serial) == SERIAL_SIZE)
{
bits2prm_ld8k( &serial[2], &parm[1]);
/* the hardware detects frame erasures by checking if all bits
are set to zero
*/
parm[0] = 0; /* No frame erasure */
for (i=2; i < SERIAL_SIZE; i++)
if (serial[i] == 0 ) parm[0] = 1; /* frame erased */
/* check parity and put 1 in parm[4] if parity error */
parm[4] = Check_Parity_Pitch(parm[3], parm[4]);
Decod_ld8k(parm, voicing, synth, Az_dec, &T0_first);
/* Postfilter */
voicing = 0;
ptr_Az = Az_dec;
for(i=0; i<L_FRAME; i+=L_SUBFR) {
Post(T0_first, &synth[i], ptr_Az, &pst_out[i], &sf_voic);
if (sf_voic != 0) { voicing = sf_voic;}
ptr_Az += MP1;
}
Copy(&synth_buf[L_FRAME], &synth_buf[0], M);
Post_Process(pst_out, L_FRAME);
#ifdef HARDW
{
Word16 *my_pt;
Word16 my_temp;
int my_i;
my_pt = pst_out;
for(my_i=0; my_i < L_FRAME; my_i++) {
my_temp = *my_pt;
my_temp = add( my_temp, (Word16) 4); /* rounding on 13 bit */
my_temp = my_temp & 0xFFF8; /* mask on 13 bit */
*my_pt++ = my_temp;
}
}
#endif
fwrite(pst_out, sizeof(Word16), L_FRAME, f_syn);
frame++;
printf("Frame =%d\r", frame);
}
return(0);
}
