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cbs_h264: Infer default VUI values if VUI parameters are not present

This commit is contained in:
Mark Thompson 2018-09-18 23:31:02 +01:00
parent 574dafe7b8
commit 1156b507f7
1 changed files with 42 additions and 0 deletions
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42
libavcodec/cbs_h264_syntax_template.c
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@ -213,6 +213,46 @@ static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
return 0;
}
static int FUNC(vui_parameters_default)(CodedBitstreamContext *ctx,
RWContext *rw, H264RawVUI *current,
H264RawSPS *sps)
{
infer(aspect_ratio_idc, 0);
infer(video_format, 5);
infer(video_full_range_flag, 0);
infer(colour_primaries, 2);
infer(transfer_characteristics, 2);
infer(matrix_coefficients, 2);
infer(chroma_sample_loc_type_top_field, 0);
infer(chroma_sample_loc_type_bottom_field, 0);
infer(fixed_frame_rate_flag, 0);
infer(low_delay_hrd_flag, 1);
infer(pic_struct_present_flag, 0);
infer(motion_vectors_over_pic_boundaries_flag, 1);
infer(max_bytes_per_pic_denom, 2);
infer(max_bits_per_mb_denom, 1);
infer(log2_max_mv_length_horizontal, 15);
infer(log2_max_mv_length_vertical, 15);
if ((sps->profile_idc == 44 || sps->profile_idc == 86 ||
sps->profile_idc == 100 || sps->profile_idc == 110 ||
sps->profile_idc == 122 || sps->profile_idc == 244) &&
sps->constraint_set3_flag) {
infer(max_num_reorder_frames, 0);
infer(max_dec_frame_buffering, 0);
} else {
infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
}
return 0;
}
static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSPS *current)
{
@ -317,6 +357,8 @@ static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
flag(vui_parameters_present_flag);
if (current->vui_parameters_present_flag)
CHECK(FUNC(vui_parameters)(ctx, rw, &current->vui, current));
else
CHECK(FUNC(vui_parameters_default)(ctx, rw, &current->vui, current));
CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));