yading@10: /* yading@10: * Copyright (C) 2007 Marco Gerards yading@10: * Copyright (C) 2009 David Conrad yading@10: * Copyright (C) 2011 Jordi Ortiz yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * Dirac Decoder yading@10: * @author Marco Gerards , David Conrad, Jordi Ortiz yading@10: */ yading@10: yading@10: #include "libavutil/imgutils.h" yading@10: #include "dirac.h" yading@10: #include "avcodec.h" yading@10: #include "golomb.h" yading@10: #include "mpeg12data.h" yading@10: yading@10: /* defaults for source parameters */ yading@10: static const dirac_source_params dirac_source_parameters_defaults[] = { yading@10: { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 }, yading@10: { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 }, yading@10: { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 }, yading@10: { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 }, yading@10: { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 }, yading@10: { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 }, yading@10: { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 }, yading@10: { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 }, yading@10: { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 }, yading@10: { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 }, yading@10: { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 }, yading@10: { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 }, yading@10: { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 }, yading@10: { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 }, yading@10: { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 }, yading@10: { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 }, yading@10: { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 }, yading@10: { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, yading@10: { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, yading@10: { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, yading@10: { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, yading@10: }; yading@10: yading@10: /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */ yading@10: static const AVRational dirac_preset_aspect_ratios[] = { yading@10: {1, 1}, yading@10: {10, 11}, yading@10: {12, 11}, yading@10: {40, 33}, yading@10: {16, 11}, yading@10: {4, 3}, yading@10: }; yading@10: yading@10: /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate. yading@10: * Table 10.3 Available preset frame rate values yading@10: */ yading@10: static const AVRational dirac_frame_rate[] = { yading@10: {15000, 1001}, yading@10: {25, 2}, yading@10: }; yading@10: yading@10: /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal yading@10: * range presets */ yading@10: static const struct { yading@10: uint8_t bitdepth; yading@10: enum AVColorRange color_range; yading@10: } pixel_range_presets[] = { yading@10: {8, AVCOL_RANGE_JPEG}, yading@10: {8, AVCOL_RANGE_MPEG}, yading@10: {10, AVCOL_RANGE_MPEG}, yading@10: {12, AVCOL_RANGE_MPEG}, yading@10: }; yading@10: yading@10: static const enum AVColorPrimaries dirac_primaries[] = { yading@10: AVCOL_PRI_BT709, yading@10: AVCOL_PRI_SMPTE170M, yading@10: AVCOL_PRI_BT470BG, yading@10: }; yading@10: yading@10: static const struct { yading@10: enum AVColorPrimaries color_primaries; yading@10: enum AVColorSpace colorspace; yading@10: enum AVColorTransferCharacteristic color_trc; yading@10: } dirac_color_presets[] = { yading@10: { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, yading@10: { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, yading@10: { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, yading@10: { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, yading@10: { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ }, yading@10: }; yading@10: yading@10: /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */ yading@10: static const enum AVPixelFormat dirac_pix_fmt[2][3] = { yading@10: { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P }, yading@10: { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P }, yading@10: }; yading@10: yading@10: /* [DIRAC_STD] 10.3 Parse Source Parameters. yading@10: * source_parameters(base_video_format) */ yading@10: static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, yading@10: dirac_source_params *source) yading@10: { yading@10: AVRational frame_rate = {0,0}; yading@10: unsigned luma_depth = 8, luma_offset = 16; yading@10: int idx; yading@10: int chroma_x_shift, chroma_y_shift; yading@10: yading@10: /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ yading@10: /* [DIRAC_STD] custom_dimensions_flag */ yading@10: if (get_bits1(gb)) { yading@10: source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ yading@10: source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ yading@10: } yading@10: yading@10: /* [DIRAC_STD] 10.3.3 Chroma Sampling Format. yading@10: * chroma_sampling_format(video_params) */ yading@10: /* [DIRAC_STD] custom_chroma_format_flag */ yading@10: if (get_bits1(gb)) yading@10: /* [DIRAC_STD] CHROMA_FORMAT_INDEX */ yading@10: source->chroma_format = svq3_get_ue_golomb(gb); yading@10: if (source->chroma_format > 2U) { yading@10: av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n", yading@10: source->chroma_format); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */ yading@10: /* [DIRAC_STD] custom_scan_format_flag */ yading@10: if (get_bits1(gb)) yading@10: /* [DIRAC_STD] SOURCE_SAMPLING */ yading@10: source->interlaced = svq3_get_ue_golomb(gb); yading@10: if (source->interlaced > 1U) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */ yading@10: if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */ yading@10: source->frame_rate_index = svq3_get_ue_golomb(gb); yading@10: yading@10: if (source->frame_rate_index > 10U) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: if (!source->frame_rate_index) { yading@10: /* [DIRAC_STD] FRAME_RATE_NUMER */ yading@10: frame_rate.num = svq3_get_ue_golomb(gb); yading@10: /* [DIRAC_STD] FRAME_RATE_DENOM */ yading@10: frame_rate.den = svq3_get_ue_golomb(gb); yading@10: } yading@10: } yading@10: /* [DIRAC_STD] preset_frame_rate(video_params, index) */ yading@10: if (source->frame_rate_index > 0) { yading@10: if (source->frame_rate_index <= 8) yading@10: frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index]; yading@10: else yading@10: /* [DIRAC_STD] Table 10.3 values 9-10 */ yading@10: frame_rate = dirac_frame_rate[source->frame_rate_index-9]; yading@10: } yading@10: av_reduce(&avctx->time_base.num, &avctx->time_base.den, yading@10: frame_rate.den, frame_rate.num, 1<<30); yading@10: yading@10: /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. yading@10: * pixel_aspect_ratio(video_params) */ yading@10: if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ yading@10: /* [DIRAC_STD] index */ yading@10: source->aspect_ratio_index = svq3_get_ue_golomb(gb); yading@10: yading@10: if (source->aspect_ratio_index > 6U) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: if (!source->aspect_ratio_index) { yading@10: avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb); yading@10: avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb); yading@10: } yading@10: } yading@10: /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel yading@10: * aspect ratio values */ yading@10: if (source->aspect_ratio_index > 0) yading@10: avctx->sample_aspect_ratio = yading@10: dirac_preset_aspect_ratios[source->aspect_ratio_index-1]; yading@10: yading@10: /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */ yading@10: if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */ yading@10: /* [DIRAC_STD] CLEAN_WIDTH */ yading@10: source->clean_width = svq3_get_ue_golomb(gb); yading@10: /* [DIRAC_STD] CLEAN_HEIGHT */ yading@10: source->clean_height = svq3_get_ue_golomb(gb); yading@10: /* [DIRAC_STD] CLEAN_LEFT_OFFSET */ yading@10: source->clean_left_offset = svq3_get_ue_golomb(gb); yading@10: /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ yading@10: source->clean_right_offset = svq3_get_ue_golomb(gb); yading@10: } yading@10: yading@10: /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) yading@10: * WARNING: Some adaptation seems to be done using the yading@10: * AVCOL_RANGE_MPEG/JPEG values */ yading@10: if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */ yading@10: /* [DIRAC_STD] index */ yading@10: source->pixel_range_index = svq3_get_ue_golomb(gb); yading@10: yading@10: if (source->pixel_range_index > 4U) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: /* This assumes either fullrange or MPEG levels only */ yading@10: if (!source->pixel_range_index) { yading@10: luma_offset = svq3_get_ue_golomb(gb); yading@10: luma_depth = av_log2(svq3_get_ue_golomb(gb))+1; yading@10: svq3_get_ue_golomb(gb); /* chroma offset */ yading@10: svq3_get_ue_golomb(gb); /* chroma excursion */ yading@10: avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: } yading@10: } yading@10: /* [DIRAC_STD] Table 10.5 yading@10: * Available signal range presets <--> pixel_range_presets */ yading@10: if (source->pixel_range_index > 0) { yading@10: idx = source->pixel_range_index-1; yading@10: luma_depth = pixel_range_presets[idx].bitdepth; yading@10: avctx->color_range = pixel_range_presets[idx].color_range; yading@10: } yading@10: yading@10: if (luma_depth > 8) yading@10: av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8\n"); yading@10: yading@10: avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format]; yading@10: avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift); yading@10: if ((source->width % (1<height % (1<color_spec_index = svq3_get_ue_golomb(gb); yading@10: yading@10: if (source->color_spec_index > 4U) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: avctx->color_primaries = dirac_color_presets[idx].color_primaries; yading@10: avctx->colorspace = dirac_color_presets[idx].colorspace; yading@10: avctx->color_trc = dirac_color_presets[idx].color_trc; yading@10: yading@10: if (!source->color_spec_index) { yading@10: /* [DIRAC_STD] 10.3.9.1 Colour primaries */ yading@10: if (get_bits1(gb)) { yading@10: idx = svq3_get_ue_golomb(gb); yading@10: if (idx < 3U) yading@10: avctx->color_primaries = dirac_primaries[idx]; yading@10: } yading@10: /* [DIRAC_STD] 10.3.9.2 Colour matrix */ yading@10: if (get_bits1(gb)) { yading@10: idx = svq3_get_ue_golomb(gb); yading@10: if (!idx) yading@10: avctx->colorspace = AVCOL_SPC_BT709; yading@10: else if (idx == 1) yading@10: avctx->colorspace = AVCOL_SPC_BT470BG; yading@10: } yading@10: /* [DIRAC_STD] 10.3.9.3 Transfer function */ yading@10: if (get_bits1(gb) && !svq3_get_ue_golomb(gb)) yading@10: avctx->color_trc = AVCOL_TRC_BT709; yading@10: } yading@10: } else { yading@10: idx = source->color_spec_index; yading@10: avctx->color_primaries = dirac_color_presets[idx].color_primaries; yading@10: avctx->colorspace = dirac_color_presets[idx].colorspace; yading@10: avctx->color_trc = dirac_color_presets[idx].color_trc; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /* [DIRAC_STD] 10. Sequence Header. sequence_header() */ yading@10: int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, yading@10: dirac_source_params *source) yading@10: { yading@10: unsigned version_major; yading@10: unsigned video_format, picture_coding_mode; yading@10: int ret; yading@10: yading@10: /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */ yading@10: version_major = svq3_get_ue_golomb(gb); yading@10: svq3_get_ue_golomb(gb); /* version_minor */ yading@10: avctx->profile = svq3_get_ue_golomb(gb); yading@10: avctx->level = svq3_get_ue_golomb(gb); yading@10: /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in yading@10: * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */ yading@10: video_format = svq3_get_ue_golomb(gb); yading@10: yading@10: if (version_major < 2) yading@10: av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n"); yading@10: else if (version_major > 2) yading@10: av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n"); yading@10: yading@10: if (video_format > 20U) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: /* Fill in defaults for the source parameters. */ yading@10: *source = dirac_source_parameters_defaults[video_format]; yading@10: yading@10: /* [DIRAC_STD] 10.3 Source Parameters yading@10: * Override the defaults. */ yading@10: if (ret = parse_source_parameters(avctx, gb, source)) yading@10: return ret; yading@10: yading@10: if (ret = av_image_check_size(source->width, source->height, 0, avctx)) yading@10: return ret; yading@10: yading@10: avcodec_set_dimensions(avctx, source->width, source->height); yading@10: yading@10: /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames yading@10: * currently only used to signal field coding */ yading@10: picture_coding_mode = svq3_get_ue_golomb(gb); yading@10: if (picture_coding_mode != 0) { yading@10: av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n", yading@10: picture_coding_mode); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: return 0; yading@10: }