From e02de9df4b218bd6e1e927b67fd4075741545688 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Sat, 5 Jul 2014 09:09:15 +0000 Subject: lavc: export Dirac parsing API used by the ogg demuxer as public Also, stop using AVCodecContext for storing the stream parameters. --- libavcodec/dirac.c | 222 ++++++++++++++++++++++++++++++++++------------------- 1 file changed, 142 insertions(+), 80 deletions(-) (limited to 'libavcodec/dirac.c') diff --git a/libavcodec/dirac.c b/libavcodec/dirac.c index 5e13a849fc..aced2ac073 100644 --- a/libavcodec/dirac.c +++ b/libavcodec/dirac.c @@ -33,6 +33,28 @@ #include "internal.h" #include "mpeg12data.h" +#if CONFIG_DIRAC_PARSE + +typedef struct dirac_source_params { + unsigned width; + unsigned height; + uint8_t chroma_format; ///< 0: 444 1: 422 2: 420 + + uint8_t interlaced; + uint8_t top_field_first; + + uint8_t frame_rate_index; ///< index into dirac_frame_rate[] + uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[] + + uint16_t clean_width; + uint16_t clean_height; + uint16_t clean_left_offset; + uint16_t clean_right_offset; + + uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[] + uint8_t color_spec_index; ///< index into dirac_color_spec_presets[] +} dirac_source_params; + // defaults for source parameters static const dirac_source_params dirac_source_parameters_defaults[] = { { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 }, @@ -116,8 +138,8 @@ static const enum AVPixelFormat dirac_pix_fmt[2][3] = { /* [DIRAC_STD] 10.3 Parse Source Parameters. * source_parameters(base_video_format) */ -static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, - dirac_source_params *source) +static int parse_source_parameters(AVDiracSeqHeader *dsh, GetBitContext *gb, + void *log_ctx) { AVRational frame_rate = { 0, 0 }; unsigned luma_depth = 8, luma_offset = 16; @@ -126,8 +148,8 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ /* [DIRAC_STD] custom_dimensions_flag */ if (get_bits1(gb)) { - source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ - source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ + dsh->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ + dsh->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ } /* [DIRAC_STD] 10.3.3 Chroma Sampling Format. @@ -135,10 +157,11 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, /* [DIRAC_STD] custom_chroma_format_flag */ if (get_bits1(gb)) /* [DIRAC_STD] CHROMA_FORMAT_INDEX */ - source->chroma_format = svq3_get_ue_golomb(gb); - if (source->chroma_format > 2) { - av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n", - source->chroma_format); + dsh->chroma_format = svq3_get_ue_golomb(gb); + if (dsh->chroma_format > 2) { + if (log_ctx) + av_log(log_ctx, AV_LOG_ERROR, "Unknown chroma format %d\n", + dsh->chroma_format); return AVERROR_INVALIDDATA; } @@ -146,18 +169,18 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, /* [DIRAC_STD] custom_scan_format_flag */ if (get_bits1(gb)) /* [DIRAC_STD] SOURCE_SAMPLING */ - source->interlaced = svq3_get_ue_golomb(gb); - if (source->interlaced > 1) + dsh->interlaced = svq3_get_ue_golomb(gb); + if (dsh->interlaced > 1) return AVERROR_INVALIDDATA; /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */ if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */ - source->frame_rate_index = svq3_get_ue_golomb(gb); + dsh->frame_rate_index = svq3_get_ue_golomb(gb); - if (source->frame_rate_index > 10) + if (dsh->frame_rate_index > 10) return AVERROR_INVALIDDATA; - if (!source->frame_rate_index) { + if (!dsh->frame_rate_index) { /* [DIRAC_STD] FRAME_RATE_NUMER */ frame_rate.num = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_RATE_DENOM */ @@ -165,45 +188,45 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, } } /* [DIRAC_STD] preset_frame_rate(video_params, index) */ - if (source->frame_rate_index > 0) { - if (source->frame_rate_index <= 8) - frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index]; + if (dsh->frame_rate_index > 0) { + if (dsh->frame_rate_index <= 8) + frame_rate = ff_mpeg12_frame_rate_tab[dsh->frame_rate_index]; else /* [DIRAC_STD] Table 10.3 values 9-10 */ - frame_rate = dirac_frame_rate[source->frame_rate_index - 9]; + frame_rate = dirac_frame_rate[dsh->frame_rate_index - 9]; } - avctx->framerate = frame_rate; + dsh->framerate = frame_rate; /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. * pixel_aspect_ratio(video_params) */ if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ /* [DIRAC_STD] index */ - source->aspect_ratio_index = svq3_get_ue_golomb(gb); + dsh->aspect_ratio_index = svq3_get_ue_golomb(gb); - if (source->aspect_ratio_index > 6) + if (dsh->aspect_ratio_index > 6) return AVERROR_INVALIDDATA; - if (!source->aspect_ratio_index) { - avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb); - avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb); + if (!dsh->aspect_ratio_index) { + dsh->sample_aspect_ratio.num = svq3_get_ue_golomb(gb); + dsh->sample_aspect_ratio.den = svq3_get_ue_golomb(gb); } } /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel * aspect ratio values */ - if (source->aspect_ratio_index > 0) - avctx->sample_aspect_ratio = - dirac_preset_aspect_ratios[source->aspect_ratio_index - 1]; + if (dsh->aspect_ratio_index > 0) + dsh->sample_aspect_ratio = + dirac_preset_aspect_ratios[dsh->aspect_ratio_index - 1]; /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */ if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */ /* [DIRAC_STD] CLEAN_WIDTH */ - source->clean_width = svq3_get_ue_golomb(gb); + dsh->clean_width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_HEIGHT */ - source->clean_height = svq3_get_ue_golomb(gb); + dsh->clean_height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_LEFT_OFFSET */ - source->clean_left_offset = svq3_get_ue_golomb(gb); + dsh->clean_left_offset = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ - source->clean_right_offset = svq3_get_ue_golomb(gb); + dsh->clean_right_offset = svq3_get_ue_golomb(gb); } /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) @@ -211,121 +234,160 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, * AVCOL_RANGE_MPEG/JPEG values */ if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */ /* [DIRAC_STD] index */ - source->pixel_range_index = svq3_get_ue_golomb(gb); + dsh->pixel_range_index = svq3_get_ue_golomb(gb); - if (source->pixel_range_index > 4) + if (dsh->pixel_range_index > 4) return AVERROR_INVALIDDATA; // This assumes either fullrange or MPEG levels only - if (!source->pixel_range_index) { + if (!dsh->pixel_range_index) { luma_offset = svq3_get_ue_golomb(gb); luma_depth = av_log2(svq3_get_ue_golomb(gb)) + 1; svq3_get_ue_golomb(gb); /* chroma offset */ svq3_get_ue_golomb(gb); /* chroma excursion */ - avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG - : AVCOL_RANGE_JPEG; + dsh->color_range = luma_offset ? AVCOL_RANGE_MPEG + : AVCOL_RANGE_JPEG; } } /* [DIRAC_STD] Table 10.5 * Available signal range presets <--> pixel_range_presets */ - if (source->pixel_range_index > 0) { - idx = source->pixel_range_index - 1; + if (dsh->pixel_range_index > 0) { + idx = dsh->pixel_range_index - 1; luma_depth = pixel_range_presets[idx].bitdepth; - avctx->color_range = pixel_range_presets[idx].color_range; + dsh->color_range = pixel_range_presets[idx].color_range; } - if (luma_depth > 8) - av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8"); + if (luma_depth > 8 && log_ctx) + av_log(log_ctx, AV_LOG_WARNING, "Bitdepth greater than 8"); - avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format]; + dsh->pix_fmt = dirac_pix_fmt[!luma_offset][dsh->chroma_format]; /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */ if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */ /* [DIRAC_STD] index */ - idx = source->color_spec_index = svq3_get_ue_golomb(gb); + idx = dsh->color_spec_index = svq3_get_ue_golomb(gb); - if (source->color_spec_index > 4) + if (dsh->color_spec_index > 4) return AVERROR_INVALIDDATA; - avctx->color_primaries = dirac_color_presets[idx].color_primaries; - avctx->colorspace = dirac_color_presets[idx].colorspace; - avctx->color_trc = dirac_color_presets[idx].color_trc; + dsh->color_primaries = dirac_color_presets[idx].color_primaries; + dsh->colorspace = dirac_color_presets[idx].colorspace; + dsh->color_trc = dirac_color_presets[idx].color_trc; - if (!source->color_spec_index) { + if (!dsh->color_spec_index) { /* [DIRAC_STD] 10.3.9.1 Colour primaries */ if (get_bits1(gb)) { idx = svq3_get_ue_golomb(gb); if (idx < 3) - avctx->color_primaries = dirac_primaries[idx]; + dsh->color_primaries = dirac_primaries[idx]; } /* [DIRAC_STD] 10.3.9.2 Colour matrix */ if (get_bits1(gb)) { idx = svq3_get_ue_golomb(gb); if (!idx) - avctx->colorspace = AVCOL_SPC_BT709; + dsh->colorspace = AVCOL_SPC_BT709; else if (idx == 1) - avctx->colorspace = AVCOL_SPC_BT470BG; + dsh->colorspace = AVCOL_SPC_BT470BG; } /* [DIRAC_STD] 10.3.9.3 Transfer function */ if (get_bits1(gb) && !svq3_get_ue_golomb(gb)) - avctx->color_trc = AVCOL_TRC_BT709; + dsh->color_trc = AVCOL_TRC_BT709; } } else { - idx = source->color_spec_index; - avctx->color_primaries = dirac_color_presets[idx].color_primaries; - avctx->colorspace = dirac_color_presets[idx].colorspace; - avctx->color_trc = dirac_color_presets[idx].color_trc; + idx = dsh->color_spec_index; + dsh->color_primaries = dirac_color_presets[idx].color_primaries; + dsh->colorspace = dirac_color_presets[idx].colorspace; + dsh->color_trc = dirac_color_presets[idx].color_trc; } return 0; } /* [DIRAC_STD] 10. Sequence Header. sequence_header() */ -int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, - dirac_source_params *source) +int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh, + const uint8_t *buf, size_t buf_size, + void *log_ctx) { + AVDiracSeqHeader *dsh; + GetBitContext gb; unsigned version_major; unsigned video_format, picture_coding_mode; int ret; + dsh = av_mallocz(sizeof(*dsh)); + if (!dsh) + return AVERROR(ENOMEM); + + ret = init_get_bits8(&gb, buf, buf_size); + if (ret < 0) + goto fail; + /* [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); + version_major = svq3_get_ue_golomb(&gb); + svq3_get_ue_golomb(&gb); /* version_minor */ + dsh->profile = svq3_get_ue_golomb(&gb); + dsh->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); + 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 (log_ctx) { + if (version_major < 2) + av_log(log_ctx, AV_LOG_WARNING, "Stream is old and may not work\n"); + else if (version_major > 2) + av_log(log_ctx, AV_LOG_WARNING, "Stream may have unhandled features\n"); + } - if (video_format > 20) - return AVERROR_INVALIDDATA; + if (video_format > 20) { + ret = AVERROR_INVALIDDATA; + goto fail; + } // Fill in defaults for the source parameters. - *source = dirac_source_parameters_defaults[video_format]; + dsh->width = dirac_source_parameters_defaults[video_format].width; + dsh->height = dirac_source_parameters_defaults[video_format].height; + dsh->chroma_format = dirac_source_parameters_defaults[video_format].chroma_format; + dsh->interlaced = dirac_source_parameters_defaults[video_format].interlaced; + dsh->top_field_first = dirac_source_parameters_defaults[video_format].top_field_first; + dsh->frame_rate_index = dirac_source_parameters_defaults[video_format].frame_rate_index; + dsh->aspect_ratio_index = dirac_source_parameters_defaults[video_format].aspect_ratio_index; + dsh->clean_width = dirac_source_parameters_defaults[video_format].clean_width; + dsh->clean_height = dirac_source_parameters_defaults[video_format].clean_height; + dsh->clean_left_offset = dirac_source_parameters_defaults[video_format].clean_left_offset; + dsh->clean_right_offset = dirac_source_parameters_defaults[video_format].clean_right_offset; + dsh->pixel_range_index = dirac_source_parameters_defaults[video_format].pixel_range_index; + dsh->color_spec_index = dirac_source_parameters_defaults[video_format].color_spec_index; /* [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); + ret = parse_source_parameters(dsh, &gb, log_ctx); if (ret < 0) - return ret; - - ff_set_sar(avctx, avctx->sample_aspect_ratio); + goto fail; /* [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); + 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 AVERROR_INVALIDDATA; + if (log_ctx) { + av_log(log_ctx, AV_LOG_ERROR, "Unsupported picture coding mode %d", + picture_coding_mode); + } + ret = AVERROR_INVALIDDATA; + goto fail; } + + *pdsh = dsh; return 0; +fail: + av_freep(&dsh); + *pdsh = NULL; + return ret; +} +#else +int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh, + const uint8_t *buf, size_t buf_size, + void *log_ctx) +{ + return AVERROR(ENOSYS); } +#endif -- cgit v1.2.3