diff --git a/libavcodec/dirac.c b/libavcodec/dirac.c new file mode 100644 index 0000000000..1d6a468d4e --- /dev/null +++ b/libavcodec/dirac.c @@ -0,0 +1,284 @@ +/* + * Copyright (C) 2007 Marco Gerards + * Copyright (C) 2009 David Conrad + * + * 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 libavcodec/dirac.c + * Dirac Decoder + * @author Marco Gerards + */ + +#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 }, +}; + +static const AVRational dirac_preset_aspect_ratios[] = { + {1, 1}, + {10, 11}, + {12, 11}, + {40, 33}, + {16, 11}, + {4, 3}, +}; + +static const AVRational dirac_frame_rate[] = { + {15000, 1001}, + {25, 2}, +}; + +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 */ }, +}; + +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 }, +}; + +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; + + if (get_bits1(gb)) { + source->width = svq3_get_ue_golomb(gb); + source->height = svq3_get_ue_golomb(gb); + } + + // chroma subsampling + if (get_bits1(gb)) + 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); + return -1; + } + + if (get_bits1(gb)) + source->interlaced = svq3_get_ue_golomb(gb); + if (source->interlaced > 1) + return -1; + + // frame rate + if (get_bits1(gb)) { + source->frame_rate_index = svq3_get_ue_golomb(gb); + + if (source->frame_rate_index > 10) + return -1; + + if (!source->frame_rate_index) { + frame_rate.num = svq3_get_ue_golomb(gb); + frame_rate.den = svq3_get_ue_golomb(gb); + } + } + if (source->frame_rate_index > 0) { + if (source->frame_rate_index <= 8) + frame_rate = ff_frame_rate_tab[source->frame_rate_index]; + else + frame_rate = dirac_frame_rate[source->frame_rate_index-9]; + } + av_reduce(&avctx->time_base.num, &avctx->time_base.den, + frame_rate.den, frame_rate.num, 1<<30); + + // aspect ratio + if (get_bits1(gb)) { + source->aspect_ratio_index = svq3_get_ue_golomb(gb); + + if (source->aspect_ratio_index > 6) + 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) + avctx->sample_aspect_ratio = + dirac_preset_aspect_ratios[source->aspect_ratio_index-1]; + + if (get_bits1(gb)) { + source->clean_width = svq3_get_ue_golomb(gb); + source->clean_height = svq3_get_ue_golomb(gb); + source->clean_left_offset = svq3_get_ue_golomb(gb); + source->clean_right_offset = svq3_get_ue_golomb(gb); + } + + // Override signal range. + if (get_bits1(gb)) { + source->pixel_range_index = svq3_get_ue_golomb(gb); + + if (source->pixel_range_index > 4) + 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 + svq3_get_ue_golomb(gb); // chroma excursion + + avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + } + } + if (source->pixel_range_index > 0) { + 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]; + + // color spec + if (get_bits1(gb)) { + idx = source->color_spec_index = svq3_get_ue_golomb(gb); + + if (source->color_spec_index > 4) + 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) { + if (get_bits1(gb)) { + idx = svq3_get_ue_golomb(gb); + if (idx < 3) + avctx->color_primaries = dirac_primaries[idx]; + } + + 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; + } + + 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; +} + +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 (avcodec_check_dimensions(avctx, source->width, source->height)) + 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; +} diff --git a/libavcodec/dirac.h b/libavcodec/dirac.h new file mode 100644 index 0000000000..5a53bd431e --- /dev/null +++ b/libavcodec/dirac.h @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2007 Marco Gerards + * Copyright (C) 2009 David Conrad + * + * 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 + */ + +#ifndef AVCODEC_DIRAC_H +#define AVCODEC_DIRAC_H + +/** + * @file libavcodec/dirac.h + * Interfaces to Dirac Decoder/Encoder + * @author Marco Gerards + */ + +#include "avcodec.h" +#include "get_bits.h" + +typedef struct { + 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; + +int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, + dirac_source_params *source); + +#endif /* AVCODEC_DIRAC_H */