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328 lines
12 KiB
328 lines
12 KiB
/* |
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* Copyright (C) 2007 Marco Gerards <marco@gnu.org> |
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* Copyright (C) 2009 David Conrad |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* Dirac Decoder |
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* @author Marco Gerards <marco@gnu.org> |
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*/ |
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#include "libavutil/imgutils.h" |
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#include "dirac.h" |
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#include "avcodec.h" |
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#include "golomb.h" |
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#include "mpeg12data.h" |
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// defaults for source parameters |
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static const dirac_source_params dirac_source_parameters_defaults[] = { |
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{ 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 }, |
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{ 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 }, |
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{ 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 }, |
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{ 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 }, |
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{ 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 }, |
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{ 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 }, |
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{ 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 }, |
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{ 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 }, |
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{ 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 }, |
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{ 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 }, |
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{ 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 }, |
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{ 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 }, |
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{ 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 }, |
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{ 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 }, |
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{ 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 }, |
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{ 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 }, |
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{ 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 }, |
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{ 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, |
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{ 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, |
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{ 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, |
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{ 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, |
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}; |
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/* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */ |
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static const AVRational dirac_preset_aspect_ratios[] = { |
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{1, 1}, |
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{10, 11}, |
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{12, 11}, |
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{40, 33}, |
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{16, 11}, |
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{4, 3}, |
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}; |
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/* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate. |
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* Table 10.3 Available preset frame rate values |
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*/ |
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static const AVRational dirac_frame_rate[] = { |
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{15000, 1001}, |
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{25, 2}, |
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}; |
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/* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal |
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* range presets */ |
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static const struct { |
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uint8_t bitdepth; |
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enum AVColorRange color_range; |
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} pixel_range_presets[] = { |
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{8, AVCOL_RANGE_JPEG}, |
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{8, AVCOL_RANGE_MPEG}, |
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{10, AVCOL_RANGE_MPEG}, |
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{12, AVCOL_RANGE_MPEG}, |
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}; |
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static const enum AVColorPrimaries dirac_primaries[] = { |
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AVCOL_PRI_BT709, |
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AVCOL_PRI_SMPTE170M, |
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AVCOL_PRI_BT470BG, |
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}; |
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static const struct { |
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enum AVColorPrimaries color_primaries; |
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enum AVColorSpace colorspace; |
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enum AVColorTransferCharacteristic color_trc; |
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} dirac_color_presets[] = { |
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{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, |
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{ AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, |
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{ AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, |
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{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, |
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{ AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ }, |
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}; |
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/* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */ |
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static const enum AVPixelFormat dirac_pix_fmt[2][3] = { |
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{ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P }, |
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{ AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P }, |
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}; |
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/* [DIRAC_STD] 10.3 Parse Source Parameters. |
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* source_parameters(base_video_format) */ |
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static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, |
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dirac_source_params *source) |
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{ |
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AVRational frame_rate = {0,0}; |
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unsigned luma_depth = 8, luma_offset = 16; |
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int idx; |
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/* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ |
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/* [DIRAC_STD] custom_dimensions_flag */ |
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if (get_bits1(gb)) { |
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source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ |
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source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ |
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} |
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/* [DIRAC_STD] 10.3.3 Chroma Sampling Format. |
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* chroma_sampling_format(video_params) */ |
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/* [DIRAC_STD] custom_chroma_format_flag */ |
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if (get_bits1(gb)) |
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/* [DIRAC_STD] CHROMA_FORMAT_INDEX */ |
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source->chroma_format = svq3_get_ue_golomb(gb); |
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if (source->chroma_format > 2) { |
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av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n", |
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source->chroma_format); |
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return AVERROR_INVALIDDATA; |
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} |
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/* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */ |
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/* [DIRAC_STD] custom_scan_format_flag */ |
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if (get_bits1(gb)) |
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/* [DIRAC_STD] SOURCE_SAMPLING */ |
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source->interlaced = svq3_get_ue_golomb(gb); |
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if (source->interlaced > 1) |
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return AVERROR_INVALIDDATA; |
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/* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */ |
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if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */ |
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source->frame_rate_index = svq3_get_ue_golomb(gb); |
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if (source->frame_rate_index > 10) |
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return AVERROR_INVALIDDATA; |
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if (!source->frame_rate_index) { |
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/* [DIRAC_STD] FRAME_RATE_NUMER */ |
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frame_rate.num = svq3_get_ue_golomb(gb); |
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/* [DIRAC_STD] FRAME_RATE_DENOM */ |
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frame_rate.den = svq3_get_ue_golomb(gb); |
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} |
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} |
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/* [DIRAC_STD] preset_frame_rate(video_params, index) */ |
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if (source->frame_rate_index > 0) { |
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if (source->frame_rate_index <= 8) |
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frame_rate = avpriv_frame_rate_tab[source->frame_rate_index]; |
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else |
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/* [DIRAC_STD] Table 10.3 values 9-10 */ |
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frame_rate = dirac_frame_rate[source->frame_rate_index-9]; |
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} |
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av_reduce(&avctx->time_base.num, &avctx->time_base.den, |
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frame_rate.den, frame_rate.num, 1<<30); |
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/* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. |
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* pixel_aspect_ratio(video_params) */ |
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if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ |
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/* [DIRAC_STD] index */ |
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source->aspect_ratio_index = svq3_get_ue_golomb(gb); |
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if (source->aspect_ratio_index > 6) |
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return AVERROR_INVALIDDATA; |
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if (!source->aspect_ratio_index) { |
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avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb); |
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avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb); |
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} |
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} |
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/* [DIRAC_STD] Take value from Table 10.4 Available preset pixel |
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* aspect ratio values */ |
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if (source->aspect_ratio_index > 0) |
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avctx->sample_aspect_ratio = |
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dirac_preset_aspect_ratios[source->aspect_ratio_index-1]; |
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/* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */ |
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if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */ |
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/* [DIRAC_STD] CLEAN_WIDTH */ |
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source->clean_width = svq3_get_ue_golomb(gb); |
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/* [DIRAC_STD] CLEAN_HEIGHT */ |
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source->clean_height = svq3_get_ue_golomb(gb); |
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/* [DIRAC_STD] CLEAN_LEFT_OFFSET */ |
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source->clean_left_offset = svq3_get_ue_golomb(gb); |
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/* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ |
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source->clean_right_offset = svq3_get_ue_golomb(gb); |
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} |
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/* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) |
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* WARNING: Some adaptation seems to be done using the |
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* AVCOL_RANGE_MPEG/JPEG values */ |
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if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */ |
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/* [DIRAC_STD] index */ |
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source->pixel_range_index = svq3_get_ue_golomb(gb); |
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if (source->pixel_range_index > 4) |
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return AVERROR_INVALIDDATA; |
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// This assumes either fullrange or MPEG levels only |
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if (!source->pixel_range_index) { |
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luma_offset = svq3_get_ue_golomb(gb); |
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luma_depth = av_log2(svq3_get_ue_golomb(gb))+1; |
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svq3_get_ue_golomb(gb); /* chroma offset */ |
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svq3_get_ue_golomb(gb); /* chroma excursion */ |
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avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; |
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} |
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} |
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/* [DIRAC_STD] Table 10.5 |
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* Available signal range presets <--> pixel_range_presets */ |
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if (source->pixel_range_index > 0) { |
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idx = source->pixel_range_index-1; |
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luma_depth = pixel_range_presets[idx].bitdepth; |
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avctx->color_range = pixel_range_presets[idx].color_range; |
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} |
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if (luma_depth > 8) |
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av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8"); |
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avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format]; |
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/* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */ |
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if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */ |
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/* [DIRAC_STD] index */ |
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idx = source->color_spec_index = svq3_get_ue_golomb(gb); |
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if (source->color_spec_index > 4) |
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return AVERROR_INVALIDDATA; |
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avctx->color_primaries = dirac_color_presets[idx].color_primaries; |
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avctx->colorspace = dirac_color_presets[idx].colorspace; |
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avctx->color_trc = dirac_color_presets[idx].color_trc; |
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if (!source->color_spec_index) { |
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/* [DIRAC_STD] 10.3.9.1 Colour primaries */ |
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if (get_bits1(gb)) { |
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idx = svq3_get_ue_golomb(gb); |
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if (idx < 3) |
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avctx->color_primaries = dirac_primaries[idx]; |
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} |
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/* [DIRAC_STD] 10.3.9.2 Colour matrix */ |
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if (get_bits1(gb)) { |
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idx = svq3_get_ue_golomb(gb); |
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if (!idx) |
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avctx->colorspace = AVCOL_SPC_BT709; |
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else if (idx == 1) |
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avctx->colorspace = AVCOL_SPC_BT470BG; |
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} |
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/* [DIRAC_STD] 10.3.9.3 Transfer function */ |
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if (get_bits1(gb) && !svq3_get_ue_golomb(gb)) |
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avctx->color_trc = AVCOL_TRC_BT709; |
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} |
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} else { |
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idx = source->color_spec_index; |
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avctx->color_primaries = dirac_color_presets[idx].color_primaries; |
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avctx->colorspace = dirac_color_presets[idx].colorspace; |
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avctx->color_trc = dirac_color_presets[idx].color_trc; |
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} |
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return 0; |
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} |
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/* [DIRAC_STD] 10. Sequence Header. sequence_header() */ |
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int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, |
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dirac_source_params *source) |
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{ |
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unsigned version_major; |
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unsigned video_format, picture_coding_mode; |
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int ret; |
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/* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */ |
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version_major = svq3_get_ue_golomb(gb); |
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svq3_get_ue_golomb(gb); /* version_minor */ |
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avctx->profile = svq3_get_ue_golomb(gb); |
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avctx->level = svq3_get_ue_golomb(gb); |
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/* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in |
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* 10.2 Base Video Format, table 10.1 Dirac predefined video formats */ |
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video_format = svq3_get_ue_golomb(gb); |
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if (version_major < 2) |
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av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n"); |
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else if (version_major > 2) |
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av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n"); |
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if (video_format > 20) |
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return AVERROR_INVALIDDATA; |
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// Fill in defaults for the source parameters. |
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*source = dirac_source_parameters_defaults[video_format]; |
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/* [DIRAC_STD] 10.3 Source Parameters |
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* Override the defaults. */ |
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if (ret = parse_source_parameters(avctx, gb, source)) |
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return ret; |
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if (ret = av_image_check_size(source->width, source->height, 0, avctx)) |
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return ret; |
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avcodec_set_dimensions(avctx, source->width, source->height); |
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/* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames |
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* currently only used to signal field coding */ |
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picture_coding_mode = svq3_get_ue_golomb(gb); |
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if (picture_coding_mode != 0) { |
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av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d", |
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picture_coding_mode); |
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return AVERROR_INVALIDDATA; |
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} |
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return 0; |
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}
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