void Init_Coder_ld8a(void)
{
/*----------------------------------------------------------------------*
* Initialize pointers to speech vector. *
* *
* *
* |--------------------|-------------|-------------|------------| *
* previous speech sf1 sf2 L_NEXT *
* *
* <---------------- Total speech vector (L_TOTAL) -----------> *
* <---------------- LPC analysis window (L_WINDOW) -----------> *
* | <-- present frame (L_FRAME) --> *
* old_speech | <-- new speech (L_FRAME) --> *
* p_window | | *
* speech | *
* new_speech *
*-----------------------------------------------------------------------*/
new_speech = old_speech + L_TOTAL - L_FRAME; /* New speech */
speech = new_speech - L_NEXT; /* Present frame */
p_window = old_speech + L_TOTAL - L_WINDOW; /* For LPC window */
/* Initialize static pointers */
wsp = old_wsp + PIT_MAX;
exc = old_exc + PIT_MAX + L_INTERPOL;
/* Static vectors to zero */
Set_zero(old_speech, L_TOTAL);
Set_zero(old_exc, PIT_MAX+L_INTERPOL);
Set_zero(old_wsp, PIT_MAX);
Set_zero(mem_w, M);
Set_zero(mem_w0, M);
Set_zero(mem_zero, M);
sharp = SHARPMIN;
/* Initialize lsp_old_q[] */
Copy(lsp_old, lsp_old_q, M);
Lsp_encw_reset();
Init_exc_err();
/* For G.729B */
/* Initialize VAD/DTX parameters */
pastVad = 1;
ppastVad = 1;
seed = INIT_SEED;
vad_init();
Init_lsfq_noise();
return;
}
void Init_Coder_ld8g(Word16 dtx_enable)
{
Word16 i;
/*----------------------------------------------------------------------*
* Initialize pointers to speech vector. *
* *
* *
* |--------------------|-------------|-------------|------------| *
* previous speech sf1 sf2 L_NEXT *
* *
* <---------------- Total speech vector (L_TOTAL) -----------> *
* <---------------- LPC analysis window (L_WINDOW) -----------> *
* | <-- present frame (L_FRAME) --> *
* old_speech | <-- new speech (L_FRAME) --> *
* p_window | | *
* speech | *
* new_speech *
*-----------------------------------------------------------------------*/
new_speech = old_speech + L_TOTAL - L_FRAME; /* New speech */
speech = new_speech - L_NEXT; /* Present frame */
p_window = old_speech + L_TOTAL - L_WINDOW; /* For LPC window */
/* Initialize static pointers */
wsp = old_wsp + PIT_MAX;
exc = old_exc + PIT_MAX + L_INTERPOL;
zero = ai_zero + M_BWDP1;
error = mem_err + M_BWD;
/* Static vectors to zero */
Set_zero(old_speech, L_TOTAL);
Set_zero(old_exc, PIT_MAX+L_INTERPOL);
Set_zero(old_wsp, PIT_MAX);
Set_zero(mem_syn, M_BWD);
Set_zero(mem_w, M_BWD);
Set_zero(mem_w0, M_BWD);
Set_zero(mem_err, M_BWD);
Set_zero(zero, L_SUBFR);
sharp = SHARPMIN;
/* Initialize lsp_old_q[] */
Copy(lsp_old, lsp_old_q, M);
Lsp_encw_resete(freq_prev);
/* to tame the coder */
Init_exc_err(); /* G.729 maintenance */
/* before : for(i=0; i<4; i++) L_exc_err[i] = 0x00004000L; /* Q14 */
/* for the backward analysis */
Set_zero(synth, L_ANA_BWD); /*Q14 */
synth_ptr = synth + MEM_SYN_BWD;
prev_lp_mode = 0;
bwd_dominant = 0; /* See file bwfw.c */
C_int = 4506; /* Filter interpolation parameter */
glob_stat = 10000; /* Mesure of global stationnarity Q8 */
stat_bwd = 0; /* Nbre of consecutive backward frames */
val_stat_bwd = 0; /* Value associated with stat_bwd */
for(i=0; i<M_BWDP1; i++) rexp[i] = 0L;
A_t_bwd_mem[0] = 4096;
for (i=1; i<M_BWDP1; i++) A_t_bwd_mem[i] = 0;
Set_zero(prev_filter, M_BWDP1);
prev_filter[0] = 4096;
Set_zero(old_A_bwd, M_BWDP1);
old_A_bwd[0]=4096;
Set_zero(old_rc_bwd, 2);
Set_zero(old_A_fwd, MP1);
old_A_fwd[0]=4096;
Set_zero(old_rc_fwd, 2);
/* For G.729B */
/* Initialize VAD/DTX parameters */
if(dtx_enable == 1) {
pastVad = 1;
ppastVad = 1;
seed = INIT_SEED;
vad_init();
Init_lsfq_noise();
Init_Cod_cng(); /* G.729 maintenance */
}
return;
}