diff options
Diffstat (limited to 'libavcodec/cbs_h264_syntax_template.c')
| -rw-r--r-- | libavcodec/cbs_h264_syntax_template.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/libavcodec/cbs_h264_syntax_template.c b/libavcodec/cbs_h264_syntax_template.c index 9587f33985..0f8bba4a0d 100644 --- a/libavcodec/cbs_h264_syntax_template.c +++ b/libavcodec/cbs_h264_syntax_template.c @@ -719,6 +719,89 @@ static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw, return 0; } +static int FUNC(film_grain_characteristics)(CodedBitstreamContext *ctx, RWContext *rw, + H264RawFilmGrainCharacteristics *current, + SEIMessageState *state) +{ + CodedBitstreamH264Context *h264 = ctx->priv_data; + const H264RawSPS *sps; + int err, c, i, j; + + HEADER("Film Grain Characteristics"); + + sps = h264->active_sps; + if (!sps) { + // If there is exactly one possible SPS but it is not yet active + // then just assume that it should be the active one. + int i, k = -1; + for (i = 0; i < H264_MAX_SPS_COUNT; i++) { + if (h264->sps[i]) { + if (k >= 0) { + k = -1; + break; + } + k = i; + } + } + if (k >= 0) + sps = h264->sps[k]; + } + + flag(film_grain_characteristics_cancel_flag); + if (!current->film_grain_characteristics_cancel_flag) { + int filmGrainBitDepth[3]; + + u(2, film_grain_model_id, 0, 1); + flag(separate_colour_description_present_flag); + if (current->separate_colour_description_present_flag) { + ub(3, film_grain_bit_depth_luma_minus8); + ub(3, film_grain_bit_depth_chroma_minus8); + flag(film_grain_full_range_flag); + ub(8, film_grain_colour_primaries); + ub(8, film_grain_transfer_characteristics); + ub(8, film_grain_matrix_coefficients); + } else { + if (!sps) { + av_log(ctx->log_ctx, AV_LOG_ERROR, + "No active SPS for film_grain_characteristics.\n"); + return AVERROR_INVALIDDATA; + } + infer(film_grain_bit_depth_luma_minus8, sps->bit_depth_luma_minus8); + infer(film_grain_bit_depth_chroma_minus8, sps->bit_depth_chroma_minus8); + infer(film_grain_full_range_flag, sps->vui.video_full_range_flag); + infer(film_grain_colour_primaries, sps->vui.colour_primaries); + infer(film_grain_transfer_characteristics, sps->vui.transfer_characteristics); + infer(film_grain_matrix_coefficients, sps->vui.matrix_coefficients); + } + + filmGrainBitDepth[0] = current->film_grain_bit_depth_luma_minus8 + 8; + filmGrainBitDepth[1] = + filmGrainBitDepth[2] = current->film_grain_bit_depth_chroma_minus8 + 8; + + u(2, blending_mode_id, 0, 1); + ub(4, log2_scale_factor); + for (c = 0; c < 3; c++) + flags(comp_model_present_flag[c], 1, c); + for (c = 0; c < 3; c++) { + if (current->comp_model_present_flag[c]) { + ubs(8, num_intensity_intervals_minus1[c], 1, c); + us(3, num_model_values_minus1[c], 0, 5, 1, c); + for (i = 0; i <= current->num_intensity_intervals_minus1[c]; i++) { + ubs(8, intensity_interval_lower_bound[c][i], 2, c, i); + ubs(8, intensity_interval_upper_bound[c][i], 2, c, i); + for (j = 0; j <= current->num_model_values_minus1[c]; j++) + ses(comp_model_value[c][i][j], 0 - current->film_grain_model_id * (1 << (filmGrainBitDepth[c] - 1)), + ((1 << filmGrainBitDepth[c]) - 1) - current->film_grain_model_id * (1 << (filmGrainBitDepth[c] - 1)), + 3, c, i, j); + } + } + } + ue(film_grain_characteristics_repetition_period, 0, 16384); + } + + return 0; +} + static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw, H264RawSEIDisplayOrientation *current, SEIMessageState *sei) |