diff options
| -rw-r--r-- | libavcodec/aaccoder_twoloop.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/libavcodec/aaccoder_twoloop.h b/libavcodec/aaccoder_twoloop.h index 397a4db5e5..4747c797d3 100644 --- a/libavcodec/aaccoder_twoloop.h +++ b/libavcodec/aaccoder_twoloop.h @@ -77,7 +77,7 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx, int toomanybits, toofewbits; char nzs[128]; uint8_t nextband[128]; - int maxsf[128]; + int maxsf[128], minsf[128]; float dists[128] = { 0 }, qenergies[128] = { 0 }, uplims[128], euplims[128], energies[128]; float maxvals[128], spread_thr_r[128]; float min_spread_thr_r, max_spread_thr_r; @@ -294,11 +294,14 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx, abs_pow34_v(s->scoefs, sce->coeffs, 1024); ff_quantize_band_cost_cache_init(s); + for (i = 0; i < sizeof(minsf) / sizeof(minsf[0]); ++i) + minsf[i] = 0; for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { start = w*128; for (g = 0; g < sce->ics.num_swb; g++) { const float *scaled = s->scoefs + start; maxvals[w*16+g] = find_max_val(sce->ics.group_len[w], sce->ics.swb_sizes[g], scaled); + minsf[w*16+g] = coef2minsf(maxvals[w*16+g]); start += sce->ics.swb_sizes[g]; } } @@ -425,7 +428,7 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx, recomprd = 1; for (i = 0; i < 128; i++) { if (sce->sf_idx[i] > SCALE_ONE_POS) { - int new_sf = FFMAX(SCALE_ONE_POS, sce->sf_idx[i] - qstep); + int new_sf = FFMAX3(minsf[i], SCALE_ONE_POS, sce->sf_idx[i] - qstep); if (new_sf != sce->sf_idx[i]) { sce->sf_idx[i] = new_sf; changed = 1; @@ -595,7 +598,7 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx, int cmb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); int mindeltasf = FFMAX(0, prev - SCALE_MAX_DIFF); int maxdeltasf = FFMIN(SCALE_MAX_POS - SCALE_DIV_512, prev + SCALE_MAX_DIFF); - if ((!cmb || dists[w*16+g] > uplims[w*16+g]) && sce->sf_idx[w*16+g] > mindeltasf) { + if ((!cmb || dists[w*16+g] > uplims[w*16+g]) && sce->sf_idx[w*16+g] > FFMAX(mindeltasf, minsf[w*16+g])) { /* Try to make sure there is some energy in every nonzero band * NOTE: This algorithm must be forcibly imbalanced, pushing harder * on holes or more distorted bands at first, otherwise there's |