| /* |
| * Copyright (C) 2007 Marco Gerards <marco@gnu.org> |
| * Copyright (C) 2009 David Conrad |
| * Copyright (C) 2011 Jordi Ortiz |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Dirac Decoder |
| * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com> |
| */ |
| |
| #include "libavutil/imgutils.h" |
| #include "dirac.h" |
| #include "avcodec.h" |
| #include "golomb.h" |
| #include "mpeg12data.h" |
| |
| /* 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 }, |
| { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 }, |
| { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 }, |
| { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 }, |
| { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 }, |
| { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 }, |
| { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 }, |
| { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 }, |
| { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 }, |
| { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 }, |
| { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 }, |
| { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 }, |
| { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 }, |
| { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 }, |
| { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 }, |
| { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 }, |
| { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 }, |
| { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, |
| { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, |
| { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, |
| { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, |
| }; |
| |
| /** |
| * Dirac Specification -> |
| * Table 10.4 - Available preset pixel aspect ratio values |
| */ |
| static const AVRational dirac_preset_aspect_ratios[] = { |
| {1, 1}, |
| {10, 11}, |
| {12, 11}, |
| {40, 33}, |
| {16, 11}, |
| {4, 3}, |
| }; |
| |
| /** |
| * Dirac Specification -> |
| * Values 9,10 of 10.3.5 Frame Rate. Table 10.3 Available preset frame rate values |
| */ |
| static const AVRational dirac_frame_rate[] = { |
| {15000, 1001}, |
| {25, 2}, |
| }; |
| |
| /** |
| * Dirac Specification -> |
| * This should be equivalent to Table 10.5 Available signal range presets |
| */ |
| static const struct { |
| uint8_t bitdepth; |
| enum AVColorRange color_range; |
| } pixel_range_presets[] = { |
| {8, AVCOL_RANGE_JPEG}, |
| {8, AVCOL_RANGE_MPEG}, |
| {10, AVCOL_RANGE_MPEG}, |
| {12, AVCOL_RANGE_MPEG}, |
| }; |
| |
| static const enum AVColorPrimaries dirac_primaries[] = { |
| AVCOL_PRI_BT709, |
| AVCOL_PRI_SMPTE170M, |
| AVCOL_PRI_BT470BG, |
| }; |
| |
| static const struct { |
| enum AVColorPrimaries color_primaries; |
| enum AVColorSpace colorspace; |
| enum AVColorTransferCharacteristic color_trc; |
| } dirac_color_presets[] = { |
| { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, |
| { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, |
| { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, |
| { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, |
| { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ }, |
| }; |
| |
| /** |
| * Dirac Specification -> |
| * Table 10.2 Supported chroma sampling formats + Luma Offset |
| */ |
| static const enum PixelFormat dirac_pix_fmt[2][3] = { |
| { PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P }, |
| { PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ420P }, |
| }; |
| |
| /** |
| * Dirac Specification -> |
| * 10.3 Parse Source Parameters. source_parameters(base_video_format) |
| */ |
| static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, |
| dirac_source_params *source) |
| { |
| AVRational frame_rate = (AVRational){0,0}; |
| unsigned luma_depth = 8, luma_offset = 16; |
| int idx; |
| |
| /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ |
| if (get_bits1(gb)) { /* [DIRAC_STD] custom_dimensions_flag */ |
| source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ |
| source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ |
| } |
| |
| /* [DIRAC_STD] 10.3.3 Chroma Sampling Format. |
| chroma_sampling_format(video_params) */ |
| if (get_bits1(gb)) /* [DIRAC_STD] custom_chroma_format_flag */ |
| source->chroma_format = svq3_get_ue_golomb(gb); /*[DIRAC_STD] CHROMA_FORMAT_INDEX */ |
| if (source->chroma_format > 2U) { |
| av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n", |
| source->chroma_format); |
| return -1; |
| } |
| |
| /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */ |
| if (get_bits1(gb)) /* [DIRAC_STD] custom_scan_format_flag */ |
| source->interlaced = svq3_get_ue_golomb(gb); /* [DIRAC_STD] SOURCE_SAMPLING */ |
| if (source->interlaced > 1U) |
| return -1; |
| |
| /* [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); |
| |
| if (source->frame_rate_index > 10U) |
| return -1; |
| |
| if (!source->frame_rate_index){ |
| frame_rate.num = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_RATE_NUMER */ |
| frame_rate.den = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_RATE_DENOM */ |
| } |
| } |
| if (source->frame_rate_index > 0) { /* [DIRAC_STD] preset_frame_rate(video_params,index) */ |
| if (source->frame_rate_index <= 8) |
| frame_rate = avpriv_frame_rate_tab[source->frame_rate_index]; /* [DIRAC_STD] Table 10.3 values 1-8 */ |
| else |
| frame_rate = dirac_frame_rate[source->frame_rate_index-9]; /* [DIRAC_STD] Table 10.3 values 9-10 */ |
| } |
| av_reduce(&avctx->time_base.num, &avctx->time_base.den, |
| frame_rate.den, frame_rate.num, 1<<30); |
| |
| /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. pixel_aspect_ratio(video_params) */ |
| if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ |
| source->aspect_ratio_index = svq3_get_ue_golomb(gb); /* [DIRAC_STD] index */ |
| |
| if (source->aspect_ratio_index > 6U) |
| return -1; |
| |
| 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 (source->aspect_ratio_index > 0) /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel aspect ratio values */ |
| avctx->sample_aspect_ratio = |
| dirac_preset_aspect_ratios[source->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 */ |
| source->clean_width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_WIDTH */ |
| source->clean_height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_HEIGHT */ |
| source->clean_left_offset = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_LEFT_OFFSET */ |
| source->clean_right_offset = svq3_get_ue_golomb(gb); /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ |
| } |
| |
| /*[DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) |
| WARNING: Some adaptation seemed to be done using the AVCOL_RANGE_MPEG/JPEG values */ |
| if (get_bits1(gb)) { /*[DIRAC_STD] custom_signal_range_flag */ |
| source->pixel_range_index = svq3_get_ue_golomb(gb); /*[DIRAC_STD] index */ |
| |
| if (source->pixel_range_index > 4U) |
| return -1; |
| |
| /* This assumes either fullrange or MPEG levels only */ |
| if (!source->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 @Jordi: Why are these two ignored? */ |
| svq3_get_ue_golomb(gb); /* chroma excursion */ |
| |
| avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; |
| } |
| } |
| if (source->pixel_range_index > 0) { /*[DIRAC_STD] Take values from Table 10.5 Available signal range presets */ |
| idx = source->pixel_range_index-1; |
| luma_depth = pixel_range_presets[idx].bitdepth; |
| avctx->color_range = pixel_range_presets[idx].color_range; |
| } |
| |
| if (luma_depth > 8) |
| av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8"); |
| |
| avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format]; |
| |
| /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */ |
| if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */ |
| idx = source->color_spec_index = svq3_get_ue_golomb(gb); /* [DIRAC_STD] index */ |
| |
| if (source->color_spec_index > 4U) |
| return -1; |
| |
| 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; |
| |
| if (!source->color_spec_index) { |
| /* [DIRAC_STD] 10.3.9.1 Color primaries */ |
| if (get_bits1(gb)) { |
| idx = svq3_get_ue_golomb(gb); |
| if (idx < 3U) |
| avctx->color_primaries = dirac_primaries[idx]; |
| } |
| /* [DIRAC_STD] 10.3.9.2 Color matrix */ |
| if (get_bits1(gb)) { |
| idx = svq3_get_ue_golomb(gb); |
| if (!idx) |
| avctx->colorspace = AVCOL_SPC_BT709; |
| else if (idx == 1) |
| avctx->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; |
| } |
| } 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; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Dirac Specification -> |
| * 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; |
| |
| /* [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 -1; |
| |
| /* Fill in defaults for the source parameters. */ |
| *source = dirac_source_parameters_defaults[video_format]; |
| |
| /*[DIRAC_STD] 10.3 Source Parameters |
| 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); |
| |
| /*[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", |
| picture_coding_mode); |
| return -1; |
| } |
| return 0; |
| } |
