static int codec_decoder(const struct PluginCodec_Definition *codec,
void *context,
const void *from,
unsigned *fromLen,
void *to, unsigned *toLen, unsigned int *flag)
{
Word16 i;
Word16 *synth;
Word16 parm[PRM_SIZE + 1];
DecState *decoder = (DecState *) context;
if (*fromLen < BYTES_PER_FRAME || *toLen < SAMPLES_PER_FRAME * 2)
return 0;
Restore_Params(from, &parm[1]);
synth = decoder->synth_buf + M;
parm[0] = 1;
for (i = 0; i < PRM_SIZE; i++) {
if (parm[i + 1] != 0) {
parm[0] = 0;
break;
}
}
parm[4] = Check_Parity_Pitch(parm[3], parm[4]);
Decod_ld8a(decoder, parm, synth, decoder->Az_dec, decoder->T2, &decoder->bad_lsf);
Post_Filter(decoder, synth, decoder->Az_dec, decoder->T2);
Post_Process(decoder, synth, L_FRAME);
for (i = 0; i < SAMPLES_PER_FRAME; i++)
((Word16 *) to)[i] = synth[i];
*fromLen = BYTES_PER_FRAME;
*toLen = SAMPLES_PER_FRAME * 2;
return 1;
}
void g729a_dec_process (void *decState, UWord8 *bitstream, Word16 *pcm,
Flag badFrame)
#endif
{
g729a_decode_frame_state *state = (g729a_decode_frame_state *)decState;
static Word16 bad_lsf = 0; /* Initialize bad LSF indicator */
Word16 parm[PRM_SIZE+1]; /* Synthesis parameters */
Word16 Az_dec[MP1*2]; /* Decoded Az for post-filter */
Word16 T2[2]; /* Pitch lag for 2 subframes */
bits2prm_ld8k( bitstream, &parm[1]);
parm[0] = badFrame ? 1 : 0; /* No frame erasure */
/* check pitch parity and put 1 in parm[4] if parity error */
parm[4] = Check_Parity_Pitch(parm[3], parm[4]);
Decod_ld8a(&state->decoderState, parm, state->synth, Az_dec, T2, bad_lsf);
Post_Filter(&state->postFilterState, state->synth, Az_dec, T2); /* Post-filter */
Post_Process(&state->postProcessState, state->synth, pcm, L_FRAME);
}
void G729aDecoder(Word16 serial[], Word16 speech[])
{
extern Word16 *synth; /* Synthesis */
Word16 parm[PRM_SIZE+1]; /* Synthesis parameters */
Word16 Az_dec[MP1*2]; /* Decoded Az for post-filter */
Word16 T2[2]; /* Pitch lag for 2 subframes */
Word16 i;
bits2prm_ld8k( &serial[2], &parm[1]);
parm[0] = 0;
for (i=2; i < SERIAL_SIZE; i++)
if (serial[i] == 0 ) parm[0] = 1;
parm[4] = Check_Parity_Pitch(parm[3], parm[4]);
Decod_ld8a(parm, synth, Az_dec, T2);
Post_Filter(synth, Az_dec, T2);
Post_Process(synth, L_FRAME);
for(i=0;i<L_FRAME;i++)
speech[i]=synth[i];
}
//#if 0
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]; /* Decoded Az for post-filter */
Word16 T2[2]; /* Pitch lag for 2 subframes */
Word16 i, frame;
FILE *f_syn, *f_serial;
printf("\n");
printf("************ G.729a 8.0 KBIT/S SPEECH DECODER ************\n");
printf("\n");
printf("------------------- Fixed point C simulation ----------------\n");
printf("\n");
printf("----------------- Version 1.1 ---------------\n");
printf("\n");
/* Passed arguments */
argc = 3;
strcpy(argv[1],"test.bit");
strcpy(argv[2],"test.dec");
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(" Synthesis 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;
bad_lsf = 0; /* Initialize bad LSF indicator */
Init_Decod_ld8a();
Init_Post_Filter();
Init_Post_Process();
/*-----------------------------------------------------------------*
* Loop for each "L_FRAME" speech data *
*-----------------------------------------------------------------*/
frame = 0;
/* c code */
while( fread(serial, sizeof(Word16), SERIAL_SIZE, f_serial) == SERIAL_SIZE)
{
//printf("Frame =%d\n", frame++);
printf("Frame =%d \n", frame);
frame = frame + 1;
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 pitch parity and put 1 in parm[4] if parity error */
parm[4] = Check_Parity_Pitch(parm[3], parm[4]);
Decod_ld8a(parm, synth, Az_dec, T2);
Post_Filter(synth, Az_dec, T2); /* Post-filter */
Post_Process(synth, L_FRAME);
fwrite(synth, sizeof(short), L_FRAME, f_syn);
}
return(0);
}
static tsk_size_t tdav_codec_g729ab_decode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size, const tsk_object_t* proto_hdr)
{
tsk_size_t out_size = 0;
int i, frame_count;
const uint8_t* data_start = (const uint8_t*)in_data;
const uint8_t* data_end;
tdav_codec_g729ab_t* g729a = (tdav_codec_g729ab_t*)self;
if(!self || !in_data || !in_size || !out_data || ((in_size % 10) && (in_size % 10 != 2))){
TSK_DEBUG_ERROR("Invalid parameter");
return 0;
}
data_end = (data_start + in_size);
frame_count = (in_size/10) + ((in_size % 10) ? 1 : 0);
out_size = 160*frame_count;
/* allocate new buffer if needed */
if(*out_max_size <out_size){
if(!(*out_data = tsk_realloc(*out_data, out_size))){
TSK_DEBUG_ERROR("Failed to allocate new buffer");
*out_max_size = 0;
return 0;
}
*out_max_size = out_size;
}
for(i=0; i<frame_count; i++){
memset(g729a->decoder.synth_buf, 0, M);
g729a->decoder.synth = g729a->decoder.synth_buf + M;
if((data_end - data_start) == 2){
unpack_SID(data_start, g729a->decoder.serial);
data_start += 2;
}
else{
unpack_G729(data_start, g729a->decoder.serial, 10);
data_start += 10;
}
bits2prm_ld8k(&g729a->decoder.serial[1], g729a->decoder.parm);
/* This part was modified for version V1.3 */
/* for speech and SID frames, the hardware detects frame erasures
by checking if all bits are set to zero */
/* for untransmitted frames, the hardware detects frame erasures
by testing serial[0] */
g729a->decoder.parm[0] = 0; /* No frame erasure */
if(g729a->decoder.serial[1] != 0) {
int j;
for (j=0; j < g729a->decoder.serial[1]; j++){
if (g729a->decoder.serial[j+2] == 0){
g729a->decoder.parm[0] = 1; /* frame erased */
break;
}
}
}
else if(g729a->decoder.serial[0] != SYNC_WORD){
g729a->decoder.parm[0] = 1;
}
if(g729a->decoder.parm[1] == 1) {
/* check parity and put 1 in parm[5] if parity error */
g729a->decoder.parm[5] = Check_Parity_Pitch(g729a->decoder.parm[4], g729a->decoder.parm[5]);
}
Decod_ld8a(g729a->decoder.parm, g729a->decoder.synth, g729a->decoder.Az_dec, g729a->decoder.T2, &g729a->decoder.Vad);
Post_Filter(g729a->decoder.synth, g729a->decoder.Az_dec, g729a->decoder.T2, g729a->decoder.Vad); /* Post-filter */
Post_Process(g729a->decoder.synth, L_FRAME);
memcpy(&((uint8_t*)*out_data)[160*i], g729a->decoder.synth, 160);
}
return out_size;
}
