/* [DIRAC_STD] 10. Sequence Header. sequence_header() */
int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
dirac_source_params *source)
{
unsigned version_major;
unsigned video_format, picture_coding_mode;
int ret;
/* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */
version_major = svq3_get_ue_golomb(gb);
svq3_get_ue_golomb(gb); /* version_minor */
avctx->profile = svq3_get_ue_golomb(gb);
avctx->level = svq3_get_ue_golomb(gb);
/* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in
* 10.2 Base Video Format, table 10.1 Dirac predefined video formats */
video_format = svq3_get_ue_golomb(gb);
if (version_major < 2)
av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
else if (version_major > 2)
av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
if (video_format > 20U)
return AVERROR_INVALIDDATA;
/* Fill in defaults for the source parameters. */
*source = dirac_source_parameters_defaults[video_format];
/* [DIRAC_STD] 10.3 Source Parameters
* Override the defaults. */
if (ret = parse_source_parameters(avctx, gb, source))
return ret;
ret = ff_set_dimensions(avctx, source->width, source->height);
if (ret < 0)
return ret;
ff_set_sar(avctx, avctx->sample_aspect_ratio);
/* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames
* currently only used to signal field coding */
picture_coding_mode = svq3_get_ue_golomb(gb);
if (picture_coding_mode != 0) {
av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n",
picture_coding_mode);
return AVERROR_INVALIDDATA;
}
return 0;
}
int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
dirac_source_params *source)
{
unsigned version_major, version_minor;
unsigned video_format, picture_coding_mode;
version_major = svq3_get_ue_golomb(gb);
version_minor = svq3_get_ue_golomb(gb);
avctx->profile = svq3_get_ue_golomb(gb);
avctx->level = svq3_get_ue_golomb(gb);
video_format = svq3_get_ue_golomb(gb);
if (version_major < 2)
av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n");
else if (version_major > 2)
av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
if (video_format > 20)
return -1;
// Fill in defaults for the source parameters.
*source = dirac_source_parameters_defaults[video_format];
// Override the defaults.
if (parse_source_parameters(avctx, gb, source))
return -1;
if (av_image_check_size(source->width, source->height, 0, avctx))
return -1;
avcodec_set_dimensions(avctx, source->width, source->height);
// currently only used to signal field coding
picture_coding_mode = svq3_get_ue_golomb(gb);
if (picture_coding_mode != 0)
{
av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d",
picture_coding_mode);
return -1;
}
return 0;
}
