static void pred_weight_table(HEVCContext *s, GetBitContext *gb) { int i = 0; int j = 0; uint8_t luma_weight_l0_flag[16]; uint8_t chroma_weight_l0_flag[16]; uint8_t luma_weight_l1_flag[16]; uint8_t chroma_weight_l1_flag[16]; int luma_log2_weight_denom; luma_log2_weight_denom = get_ue_golomb_long(gb); if (luma_log2_weight_denom < 0 || luma_log2_weight_denom > 7) av_log(s->avctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is invalid\n", luma_log2_weight_denom); s->sh.luma_log2_weight_denom = av_clip_uintp2(luma_log2_weight_denom, 3); if (s->ps.sps->chroma_format_idc != 0) { int delta = get_se_golomb(gb); s->sh.chroma_log2_weight_denom = av_clip_uintp2(s->sh.luma_log2_weight_denom + delta, 3); } for (i = 0; i < s->sh.nb_refs[L0]; i++) { luma_weight_l0_flag[i] = get_bits1(gb); if (!luma_weight_l0_flag[i]) { s->sh.luma_weight_l0[i] = 1 << s->sh.luma_log2_weight_denom; s->sh.luma_offset_l0[i] = 0; } } if (s->ps.sps->chroma_format_idc != 0) { for (i = 0; i < s->sh.nb_refs[L0]; i++) chroma_weight_l0_flag[i] = get_bits1(gb); } else { for (i = 0; i < s->sh.nb_refs[L0]; i++) chroma_weight_l0_flag[i] = 0; } for (i = 0; i < s->sh.nb_refs[L0]; i++) { if (luma_weight_l0_flag[i]) { int delta_luma_weight_l0 = get_se_golomb(gb); s->sh.luma_weight_l0[i] = (1 << s->sh.luma_log2_weight_denom) + delta_luma_weight_l0; s->sh.luma_offset_l0[i] = get_se_golomb(gb); } if (chroma_weight_l0_flag[i]) { for (j = 0; j < 2; j++) { int delta_chroma_weight_l0 = get_se_golomb(gb); int delta_chroma_offset_l0 = get_se_golomb(gb); s->sh.chroma_weight_l0[i][j] = (1 << s->sh.chroma_log2_weight_denom) + delta_chroma_weight_l0; s->sh.chroma_offset_l0[i][j] = av_clip((delta_chroma_offset_l0 - ((128 * s->sh.chroma_weight_l0[i][j]) >> s->sh.chroma_log2_weight_denom) + 128), -128, 127); } } else { s->sh.chroma_weight_l0[i][0] = 1 << s->sh.chroma_log2_weight_denom; s->sh.chroma_offset_l0[i][0] = 0; s->sh.chroma_weight_l0[i][1] = 1 << s->sh.chroma_log2_weight_denom; s->sh.chroma_offset_l0[i][1] = 0; } } if (s->sh.slice_type == HEVC_SLICE_B) { for (i = 0; i < s->sh.nb_refs[L1]; i++) { luma_weight_l1_flag[i] = get_bits1(gb); if (!luma_weight_l1_flag[i]) { s->sh.luma_weight_l1[i] = 1 << s->sh.luma_log2_weight_denom; s->sh.luma_offset_l1[i] = 0; } } if (s->ps.sps->chroma_format_idc != 0) { for (i = 0; i < s->sh.nb_refs[L1]; i++) chroma_weight_l1_flag[i] = get_bits1(gb); } else { for (i = 0; i < s->sh.nb_refs[L1]; i++) chroma_weight_l1_flag[i] = 0; } for (i = 0; i < s->sh.nb_refs[L1]; i++) { if (luma_weight_l1_flag[i]) { int delta_luma_weight_l1 = get_se_golomb(gb); s->sh.luma_weight_l1[i] = (1 << s->sh.luma_log2_weight_denom) + delta_luma_weight_l1; s->sh.luma_offset_l1[i] = get_se_golomb(gb); } if (chroma_weight_l1_flag[i]) { for (j = 0; j < 2; j++) { int delta_chroma_weight_l1 = get_se_golomb(gb); int delta_chroma_offset_l1 = get_se_golomb(gb); s->sh.chroma_weight_l1[i][j] = (1 << s->sh.chroma_log2_weight_denom) + delta_chroma_weight_l1; s->sh.chroma_offset_l1[i][j] = av_clip((delta_chroma_offset_l1 - ((128 * s->sh.chroma_weight_l1[i][j]) >> s->sh.chroma_log2_weight_denom) + 128), -128, 127); } } else { s->sh.chroma_weight_l1[i][0] = 1 << s->sh.chroma_log2_weight_denom; s->sh.chroma_offset_l1[i][0] = 0; s->sh.chroma_weight_l1[i][1] = 1 << s->sh.chroma_log2_weight_denom; s->sh.chroma_offset_l1[i][1] = 0; } } } }