void lt_prediction(ic_stream *ics, ltp_info *ltp, real_t *spec,
int16_t *lt_pred_stat, fb_info *fb, uint8_t win_shape,
uint8_t win_shape_prev, uint8_t sr_index,
uint8_t object_type, uint16_t frame_len)
{
uint8_t sfb;
uint16_t bin, i, num_samples;
ALIGN real_t x_est[2048];
ALIGN real_t X_est[2048];
if (ics->window_sequence != EIGHT_SHORT_SEQUENCE)
{
if (ltp->data_present)
{
num_samples = frame_len << 1;
for(i = 0; i < num_samples; i++)
{
/* The extra lookback M (N/2 for LD, 0 for LTP) is handled
in the buffer updating */
#if 0
x_est[i] = MUL_R_C(lt_pred_stat[num_samples + i - ltp->lag],
codebook[ltp->coef]);
#else
/* lt_pred_stat is a 16 bit int, multiplied with the fixed point real
this gives a real for x_est
*/
x_est[i] = (real_t)lt_pred_stat[num_samples + i - ltp->lag] * codebook[ltp->coef];
#endif
}
filter_bank_ltp(fb, ics->window_sequence, win_shape, win_shape_prev,
x_est, X_est, object_type, frame_len);
tns_encode_frame(ics, &(ics->tns), sr_index, object_type, X_est,
frame_len);
for (sfb = 0; sfb < ltp->last_band; sfb++)
{
if (ltp->long_used[sfb])
{
uint16_t low = ics->swb_offset[sfb];
uint16_t high = ics->swb_offset[sfb+1];
for (bin = low; bin < high; bin++)
{
spec[bin] += X_est[bin];
}
}
}
}
}
}
void lt_prediction(ic_stream *ics, ltp_info *ltp, real_t *spec,
real_t *lt_pred_stat, fb_info *fb, uint8_t win_shape,
uint8_t win_shape_prev, uint8_t sr_index,
uint8_t object_type, uint16_t frame_len)
{
uint8_t sfb;
uint16_t bin, i, num_samples;
real_t *x_est;
real_t *X_est;
if (ics->window_sequence != EIGHT_SHORT_SEQUENCE)
{
if (ltp->data_present)
{
num_samples = frame_len << 1;
x_est = (real_t*)malloc(num_samples*sizeof(real_t));
X_est = (real_t*)malloc(num_samples*sizeof(real_t));
for(i = 0; i < num_samples; i++)
{
/* The extra lookback M (N/2 for LD, 0 for LTP) is handled
in the buffer updating */
x_est[i] = MUL_R_C(lt_pred_stat[num_samples + i - ltp->lag],
codebook[ltp->coef]);
}
filter_bank_ltp(fb, ics->window_sequence, win_shape, win_shape_prev,
x_est, X_est, object_type, frame_len);
tns_encode_frame(ics, &(ics->tns), sr_index, object_type, X_est,
frame_len);
for (sfb = 0; sfb < ltp->last_band; sfb++)
{
if (ltp->long_used[sfb])
{
uint16_t low = ics->swb_offset[sfb];
uint16_t high = ics->swb_offset[sfb+1];
for (bin = low; bin < high; bin++)
{
spec[bin] += X_est[bin];
}
}
}
free(x_est);
free(X_est);
}
}
}
/* NON-overlapping inverse filterbank for use with SSR */
void ssr_ifilter_bank(fb_info *fb, uint8_t window_sequence, uint8_t window_shape,
uint8_t window_shape_prev, real_t *freq_in,
real_t *time_out, uint16_t frame_len)
{
int16_t i;
real_t *transf_buf;
real_t *window_long;
real_t *window_long_prev;
real_t *window_short;
real_t *window_short_prev;
uint16_t nlong = frame_len;
uint16_t nshort = frame_len/8;
uint16_t trans = nshort/2;
uint16_t nflat_ls = (nlong-nshort)/2;
transf_buf = (real_t*)faad_malloc(2*nlong*sizeof(real_t));
window_long = fb->long_window[window_shape];
window_long_prev = fb->long_window[window_shape_prev];
window_short = fb->short_window[window_shape];
window_short_prev = fb->short_window[window_shape_prev];
switch (window_sequence)
{
case ONLY_LONG_SEQUENCE:
imdct_ssr(fb, freq_in, transf_buf, 2*nlong);
for (i = nlong-1; i >= 0; i--)
{
time_out[i] = MUL_R_C(transf_buf[i],window_long_prev[i]);
time_out[nlong+i] = MUL_R_C(transf_buf[nlong+i],window_long[nlong-1-i]);
}
break;
case LONG_START_SEQUENCE:
imdct_ssr(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i < nlong; i++)
time_out[i] = MUL_R_C(transf_buf[i],window_long_prev[i]);
for (i = 0; i < nflat_ls; i++)
time_out[nlong+i] = transf_buf[nlong+i];
for (i = 0; i < nshort; i++)
time_out[nlong+nflat_ls+i] = MUL_R_C(transf_buf[nlong+nflat_ls+i],window_short[nshort-i-1]);
for (i = 0; i < nflat_ls; i++)
time_out[nlong+nflat_ls+nshort+i] = 0;
break;
case EIGHT_SHORT_SEQUENCE:
imdct_ssr(fb, freq_in+0*nshort, transf_buf+2*nshort*0, 2*nshort);
imdct_ssr(fb, freq_in+1*nshort, transf_buf+2*nshort*1, 2*nshort);
imdct_ssr(fb, freq_in+2*nshort, transf_buf+2*nshort*2, 2*nshort);
imdct_ssr(fb, freq_in+3*nshort, transf_buf+2*nshort*3, 2*nshort);
imdct_ssr(fb, freq_in+4*nshort, transf_buf+2*nshort*4, 2*nshort);
imdct_ssr(fb, freq_in+5*nshort, transf_buf+2*nshort*5, 2*nshort);
imdct_ssr(fb, freq_in+6*nshort, transf_buf+2*nshort*6, 2*nshort);
imdct_ssr(fb, freq_in+7*nshort, transf_buf+2*nshort*7, 2*nshort);
for(i = nshort-1; i >= 0; i--)
{
time_out[i+0*nshort] = MUL_R_C(transf_buf[nshort*0+i],window_short_prev[i]);
time_out[i+1*nshort] = MUL_R_C(transf_buf[nshort*1+i],window_short[i]);
time_out[i+2*nshort] = MUL_R_C(transf_buf[nshort*2+i],window_short_prev[i]);
time_out[i+3*nshort] = MUL_R_C(transf_buf[nshort*3+i],window_short[i]);
time_out[i+4*nshort] = MUL_R_C(transf_buf[nshort*4+i],window_short_prev[i]);
time_out[i+5*nshort] = MUL_R_C(transf_buf[nshort*5+i],window_short[i]);
time_out[i+6*nshort] = MUL_R_C(transf_buf[nshort*6+i],window_short_prev[i]);
time_out[i+7*nshort] = MUL_R_C(transf_buf[nshort*7+i],window_short[i]);
time_out[i+8*nshort] = MUL_R_C(transf_buf[nshort*8+i],window_short_prev[i]);
time_out[i+9*nshort] = MUL_R_C(transf_buf[nshort*9+i],window_short[i]);
time_out[i+10*nshort] = MUL_R_C(transf_buf[nshort*10+i],window_short_prev[i]);
time_out[i+11*nshort] = MUL_R_C(transf_buf[nshort*11+i],window_short[i]);
time_out[i+12*nshort] = MUL_R_C(transf_buf[nshort*12+i],window_short_prev[i]);
time_out[i+13*nshort] = MUL_R_C(transf_buf[nshort*13+i],window_short[i]);
time_out[i+14*nshort] = MUL_R_C(transf_buf[nshort*14+i],window_short_prev[i]);
time_out[i+15*nshort] = MUL_R_C(transf_buf[nshort*15+i],window_short[i]);
}
break;
case LONG_STOP_SEQUENCE:
imdct_ssr(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i < nflat_ls; i++)
time_out[i] = 0;
for (i = 0; i < nshort; i++)
time_out[nflat_ls+i] = MUL_R_C(transf_buf[nflat_ls+i],window_short_prev[i]);
for (i = 0; i < nflat_ls; i++)
time_out[nflat_ls+nshort+i] = transf_buf[nflat_ls+nshort+i];
for (i = 0; i < nlong; i++)
time_out[nlong+i] = MUL_R_C(transf_buf[nlong+i],window_long[nlong-1-i]);
break;
}
faad_free(transf_buf);
}
/* only works for LTP -> no overlapping, no short blocks */
void filter_bank_ltp(fb_info *fb, uint8_t window_sequence, uint8_t window_shape,
uint8_t window_shape_prev, real_t *in_data, real_t *out_mdct,
uint8_t object_type, uint16_t frame_len)
{
int16_t i;
real_t *windowed_buf;
real_t *window_long;
real_t *window_long_prev;
real_t *window_short;
real_t *window_short_prev;
uint16_t nlong = frame_len;
uint16_t nshort = frame_len/8;
uint16_t nflat_ls = (nlong-nshort)/2;
windowed_buf = fb->tmp_buf;
#ifdef LD_DEC
if (object_type == LD)
{
window_long = fb->ld_window[window_shape];
window_long_prev = fb->ld_window[window_shape_prev];
} else {
#endif
window_long = fb->long_window[window_shape];
window_long_prev = fb->long_window[window_shape_prev];
window_short = fb->short_window[window_shape];
window_short_prev = fb->short_window[window_shape_prev];
#ifdef LD_DEC
}
#endif
switch(window_sequence)
{
case ONLY_LONG_SEQUENCE:
for (i = nlong-1; i >= 0; i--)
{
windowed_buf[i] = MUL_R_C(in_data[i], window_long_prev[i]);
windowed_buf[i+nlong] = MUL_R_C(in_data[i+nlong], window_long[nlong-1-i]);
}
mdct(fb, windowed_buf, out_mdct, 2*nlong);
break;
case LONG_START_SEQUENCE:
for (i = 0; i < nlong; i++)
windowed_buf[i] = MUL_R_C(in_data[i], window_long_prev[i]);
for (i = 0; i < nflat_ls; i++)
windowed_buf[i+nlong] = in_data[i+nlong];
for (i = 0; i < nshort; i++)
windowed_buf[i+nlong+nflat_ls] = MUL_R_C(in_data[i+nlong+nflat_ls], window_short[nshort-1-i]);
for (i = 0; i < nflat_ls; i++)
windowed_buf[i+nlong+nflat_ls+nshort] = 0;
mdct(fb, windowed_buf, out_mdct, 2*nlong);
break;
case LONG_STOP_SEQUENCE:
for (i = 0; i < nflat_ls; i++)
windowed_buf[i] = 0;
for (i = 0; i < nshort; i++)
windowed_buf[i+nflat_ls] = MUL_R_C(in_data[i+nflat_ls], window_short_prev[i]);
for (i = 0; i < nflat_ls; i++)
windowed_buf[i+nflat_ls+nshort] = in_data[i+nflat_ls+nshort];
for (i = 0; i < nlong; i++)
windowed_buf[i+nlong] = MUL_R_C(in_data[i+nlong], window_long[nlong-1-i]);
mdct(fb, windowed_buf, out_mdct, 2*nlong);
break;
}
}
void ifilter_bank(fb_info *fb, uint8_t window_sequence, uint8_t window_shape,
uint8_t window_shape_prev, real_t *freq_in,
real_t *time_out, uint8_t object_type, uint16_t frame_len)
{
int32_t i;
real_t *transf_buf=fb->tmp_buf;
real_t *window_long;
real_t *window_long_prev;
real_t *window_short;
real_t *window_short_prev;
uint32_t nlong = frame_len;
uint32_t nshort = frame_len/8;
uint32_t trans = nshort/2;
uint32_t nflat_ls = (nlong-nshort)/2;
#ifdef LD_DEC
if (object_type == LD){
window_long = fb->ld_window[window_shape];
window_long_prev = fb->ld_window[window_shape_prev];
} else {
#endif
window_long = fb->long_window[window_shape];
window_long_prev = fb->long_window[window_shape_prev];
window_short = fb->short_window[window_shape];
window_short_prev = fb->short_window[window_shape_prev];
#ifdef LD_DEC
}
#endif
switch (window_sequence){
case ONLY_LONG_SEQUENCE:
imdct(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i <nlong; i+=4){
time_out[i ] = time_out[nlong+i ] + MUL_R_C(transf_buf[i ],window_long_prev[i ]);
time_out[nlong+i ] = MUL_R_C(transf_buf[nlong+i ],window_long[nlong-1-i]);
time_out[i+1] = time_out[nlong+i+1] + MUL_R_C(transf_buf[i+1],window_long_prev[i+1]);
time_out[nlong+i+1] = MUL_R_C(transf_buf[nlong+i+1],window_long[nlong-1-i-1]);
time_out[i+2] = time_out[nlong+i+2] + MUL_R_C(transf_buf[i+2],window_long_prev[i+2]);
time_out[nlong+i+2] = MUL_R_C(transf_buf[nlong+i+2],window_long[nlong-1-i-2]);
time_out[i+3] = time_out[nlong+i+3] + MUL_R_C(transf_buf[i+3],window_long_prev[i+3]);
time_out[nlong+i+3] = MUL_R_C(transf_buf[nlong+i+3],window_long[nlong-1-i-3]);
}
/*for (i = nlong-1; i >= 0; i--){
time_out[i] = time_out[nlong+i] + MUL_R_C(transf_buf[i],window_long_prev[i]);
time_out[nlong+i] = MUL_R_C(transf_buf[nlong+i],window_long[nlong-1-i]);
}*/
break;
case LONG_START_SEQUENCE:
imdct(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i <nlong; i+=4){
time_out[i ] = time_out[nlong+i ] + MUL_R_C(transf_buf[i ],window_long_prev[i ]);
time_out[i+1] = time_out[nlong+i+1] + MUL_R_C(transf_buf[i+1],window_long_prev[i+1]);
time_out[i+2] = time_out[nlong+i+2] + MUL_R_C(transf_buf[i+2],window_long_prev[i+2]);
time_out[i+3] = time_out[nlong+i+3] + MUL_R_C(transf_buf[i+3],window_long_prev[i+3]);
}
//for (i = 0; i < nlong; i++)
// time_out[i] = time_out[nlong+i] + MUL_R_C(transf_buf[i],window_long_prev[i]);
for (i = 0; i < nflat_ls; i++)
time_out[nlong+i] = transf_buf[nlong+i];
for (i = 0; i < nshort; i++)
time_out[nlong+nflat_ls+i] = MUL_R_C(transf_buf[nlong+nflat_ls+i],window_short[nshort-i-1]);
for (i = 0; i < nflat_ls; i++)
time_out[nlong+nflat_ls+nshort+i] = 0;
break;
case EIGHT_SHORT_SEQUENCE:
imdct(fb, freq_in+0*nshort, transf_buf+2*nshort*0, 2*nshort);
imdct(fb, freq_in+1*nshort, transf_buf+2*nshort*1, 2*nshort);
imdct(fb, freq_in+2*nshort, transf_buf+2*nshort*2, 2*nshort);
imdct(fb, freq_in+3*nshort, transf_buf+2*nshort*3, 2*nshort);
imdct(fb, freq_in+4*nshort, transf_buf+2*nshort*4, 2*nshort);
imdct(fb, freq_in+5*nshort, transf_buf+2*nshort*5, 2*nshort);
imdct(fb, freq_in+6*nshort, transf_buf+2*nshort*6, 2*nshort);
imdct(fb, freq_in+7*nshort, transf_buf+2*nshort*7, 2*nshort);
for (i = 0; i < nflat_ls; i++)
time_out[i] = time_out[nlong+i];
for(i = nshort-1; i >= 0; i--){
time_out[nflat_ls+ i] = time_out[nlong+nflat_ls+ i] + MUL_R_C(transf_buf[nshort*0+i],window_short_prev[i]);
time_out[nflat_ls+1*nshort+i] = time_out[nlong+nflat_ls+nshort*1+i] + MUL_R_C(transf_buf[nshort*1+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*2+i],window_short[i]);
time_out[nflat_ls+2*nshort+i] = time_out[nlong+nflat_ls+nshort*2+i] + MUL_R_C(transf_buf[nshort*3+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*4+i],window_short[i]);
time_out[nflat_ls+3*nshort+i] = time_out[nlong+nflat_ls+nshort*3+i] + MUL_R_C(transf_buf[nshort*5+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*6+i],window_short[i]);
if (i < trans)
time_out[nflat_ls+4*nshort+i] = time_out[nlong+nflat_ls+nshort*4+i] + MUL_R_C(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*8+i],window_short[i]);
else
time_out[nflat_ls+4*nshort+i] = MUL_R_C(transf_buf[nshort*7+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*8+i],window_short[i]);
time_out[nflat_ls+5*nshort+i] = MUL_R_C(transf_buf[nshort*9+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*10+i],window_short[i]);
time_out[nflat_ls+6*nshort+i] = MUL_R_C(transf_buf[nshort*11+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*12+i],window_short[i]);
time_out[nflat_ls+7*nshort+i] = MUL_R_C(transf_buf[nshort*13+i],window_short[nshort-1-i]) + MUL_R_C(transf_buf[nshort*14+i],window_short[i]);
time_out[nflat_ls+8*nshort+i] = MUL_R_C(transf_buf[nshort*15+i],window_short[nshort-1-i]);
}
for (i = 0; i < nflat_ls; i++)
time_out[nlong+nflat_ls+nshort+i] = 0;
break;
case LONG_STOP_SEQUENCE:
imdct(fb, freq_in, transf_buf, 2*nlong);
for (i = 0; i < nflat_ls; i++)
time_out[i] = time_out[nlong+i];
for (i = 0; i < nshort; i++)
time_out[nflat_ls+i] = time_out[nlong+nflat_ls+i] + MUL_R_C(transf_buf[nflat_ls+i],window_short_prev[i]);
for (i = 0; i < nflat_ls; i++)
time_out[nflat_ls+nshort+i] = time_out[nlong+nflat_ls+nshort+i] + transf_buf[nflat_ls+nshort+i];
for (i = 0; i < nlong; i++)
time_out[nlong+i] = MUL_R_C(transf_buf[nlong+i],window_long[nlong-1-i]);
break;
}
}
