#define TRELLIS_STAGES 121
#define TRELLIS_STATES (SCALE_MAX_DIFF+1)
+static void set_special_band_scalefactors(AACEncContext *s, SingleChannelElement *sce)
+{
+ int w, g, start = 0;
+ int minscaler_n = sce->sf_idx[0], minscaler_i = sce->sf_idx[0];
+ int bands = 0;
+
+ for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
+ start = 0;
+ for (g = 0; g < sce->ics.num_swb; g++) {
+ if (sce->band_type[w*16+g] == INTENSITY_BT || sce->band_type[w*16+g] == INTENSITY_BT2) {
+ sce->sf_idx[w*16+g] = av_clip(ceilf(log2f(sce->is_ener[w*16+g])*2), -155, 100);
+ minscaler_i = FFMIN(minscaler_i, sce->sf_idx[w*16+g]);
+ bands++;
+ } else if (sce->band_type[w*16+g] == NOISE_BT) {
+ sce->sf_idx[w*16+g] = av_clip(4+log2f(sce->pns_ener[w*16+g])*2, -100, 155);
+ minscaler_n = FFMIN(minscaler_n, sce->sf_idx[w*16+g]);
+ bands++;
+ }
+ start += sce->ics.swb_sizes[g];
+ }
+ }
+
+ if (!bands)
+ return;
+
+ /* Clip the scalefactor indices */
+ for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
+ for (g = 0; g < sce->ics.num_swb; g++) {
+ if (sce->band_type[w*16+g] == INTENSITY_BT || sce->band_type[w*16+g] == INTENSITY_BT2) {
+ sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], minscaler_i, minscaler_i + SCALE_MAX_DIFF);
+ } else if (sce->band_type[w*16+g] == NOISE_BT) {
+ sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], minscaler_n, minscaler_n + SCALE_MAX_DIFF);
+ }
+ }
+ }
+}
+
static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s,
SingleChannelElement *sce,
const float lambda)
SingleChannelElement *sce)
{
int diff, off_sf = sce->sf_idx[0], off_pns = sce->sf_idx[0] - NOISE_OFFSET;
- int noise_flag = 1;
+ int off_is = 0, noise_flag = 1;
int i, w;
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
put_bits(&s->pb, NOISE_PRE_BITS, diff + NOISE_PRE);
continue;
}
+ } else if (sce->band_type[w*16 + i] == INTENSITY_BT ||
+ sce->band_type[w*16 + i] == INTENSITY_BT2) {
+ diff = sce->sf_idx[w*16 + i] - off_is;
+ off_is = sce->sf_idx[w*16 + i];
} else {
diff = sce->sf_idx[w*16 + i] - off_sf;
off_sf = sce->sf_idx[w*16 + i];