1/* 2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org> 3 * Copyright (C) 2009 David Conrad 4 * Copyright (C) 2011 Jordi Ortiz 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23/** 24 * @file 25 * Dirac Decoder 26 * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com> 27 */ 28 29#include "libavutil/imgutils.h" 30#include "dirac.h" 31#include "avcodec.h" 32#include "golomb.h" 33#include "internal.h" 34#include "mpeg12data.h" 35 36/* defaults for source parameters */ 37static const dirac_source_params dirac_source_parameters_defaults[] = { 38 { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 }, 39 { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 }, 40 { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 }, 41 { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 }, 42 { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 }, 43 { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 }, 44 { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 }, 45 { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 }, 46 { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 }, 47 { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 }, 48 { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 }, 49 { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 }, 50 { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 }, 51 { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 }, 52 { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 }, 53 { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 }, 54 { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 }, 55 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, 56 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, 57 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, 58 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, 59}; 60 61/* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */ 62static const AVRational dirac_preset_aspect_ratios[] = { 63 {1, 1}, 64 {10, 11}, 65 {12, 11}, 66 {40, 33}, 67 {16, 11}, 68 {4, 3}, 69}; 70 71/* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate. 72 * Table 10.3 Available preset frame rate values 73 */ 74static const AVRational dirac_frame_rate[] = { 75 {15000, 1001}, 76 {25, 2}, 77}; 78 79/* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal 80 * range presets */ 81static const struct { 82 uint8_t bitdepth; 83 enum AVColorRange color_range; 84} pixel_range_presets[] = { 85 {8, AVCOL_RANGE_JPEG}, 86 {8, AVCOL_RANGE_MPEG}, 87 {10, AVCOL_RANGE_MPEG}, 88 {12, AVCOL_RANGE_MPEG}, 89}; 90 91static const enum AVColorPrimaries dirac_primaries[] = { 92 AVCOL_PRI_BT709, 93 AVCOL_PRI_SMPTE170M, 94 AVCOL_PRI_BT470BG, 95}; 96 97static const struct { 98 enum AVColorPrimaries color_primaries; 99 enum AVColorSpace colorspace; 100 enum AVColorTransferCharacteristic color_trc; 101} dirac_color_presets[] = { 102 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, 103 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, 104 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, 105 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, 106 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ }, 107}; 108 109/* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */ 110static const enum AVPixelFormat dirac_pix_fmt[2][3] = { 111 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P }, 112 { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P }, 113}; 114 115/* [DIRAC_STD] 10.3 Parse Source Parameters. 116 * source_parameters(base_video_format) */ 117static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, 118 dirac_source_params *source) 119{ 120 AVRational frame_rate = {0,0}; 121 unsigned luma_depth = 8, luma_offset = 16; 122 int idx; 123 int chroma_x_shift, chroma_y_shift; 124 125 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ 126 /* [DIRAC_STD] custom_dimensions_flag */ 127 if (get_bits1(gb)) { 128 source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ 129 source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ 130 } 131 132 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format. 133 * chroma_sampling_format(video_params) */ 134 /* [DIRAC_STD] custom_chroma_format_flag */ 135 if (get_bits1(gb)) 136 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */ 137 source->chroma_format = svq3_get_ue_golomb(gb); 138 if (source->chroma_format > 2U) { 139 av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n", 140 source->chroma_format); 141 return AVERROR_INVALIDDATA; 142 } 143 144 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */ 145 /* [DIRAC_STD] custom_scan_format_flag */ 146 if (get_bits1(gb)) 147 /* [DIRAC_STD] SOURCE_SAMPLING */ 148 source->interlaced = svq3_get_ue_golomb(gb); 149 if (source->interlaced > 1U) 150 return AVERROR_INVALIDDATA; 151 152 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */ 153 if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */ 154 source->frame_rate_index = svq3_get_ue_golomb(gb); 155 156 if (source->frame_rate_index > 10U) 157 return AVERROR_INVALIDDATA; 158 159 if (!source->frame_rate_index) { 160 /* [DIRAC_STD] FRAME_RATE_NUMER */ 161 frame_rate.num = svq3_get_ue_golomb(gb); 162 /* [DIRAC_STD] FRAME_RATE_DENOM */ 163 frame_rate.den = svq3_get_ue_golomb(gb); 164 } 165 } 166 /* [DIRAC_STD] preset_frame_rate(video_params, index) */ 167 if (source->frame_rate_index > 0) { 168 if (source->frame_rate_index <= 8) 169 frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index]; 170 else 171 /* [DIRAC_STD] Table 10.3 values 9-10 */ 172 frame_rate = dirac_frame_rate[source->frame_rate_index-9]; 173 } 174 av_reduce(&avctx->time_base.num, &avctx->time_base.den, 175 frame_rate.den, frame_rate.num, 1<<30); 176 177 /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. 178 * pixel_aspect_ratio(video_params) */ 179 if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ 180 /* [DIRAC_STD] index */ 181 source->aspect_ratio_index = svq3_get_ue_golomb(gb); 182 183 if (source->aspect_ratio_index > 6U) 184 return AVERROR_INVALIDDATA; 185 186 if (!source->aspect_ratio_index) { 187 avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb); 188 avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb); 189 } 190 } 191 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel 192 * aspect ratio values */ 193 if (source->aspect_ratio_index > 0) 194 avctx->sample_aspect_ratio = 195 dirac_preset_aspect_ratios[source->aspect_ratio_index-1]; 196 197 /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */ 198 if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */ 199 /* [DIRAC_STD] CLEAN_WIDTH */ 200 source->clean_width = svq3_get_ue_golomb(gb); 201 /* [DIRAC_STD] CLEAN_HEIGHT */ 202 source->clean_height = svq3_get_ue_golomb(gb); 203 /* [DIRAC_STD] CLEAN_LEFT_OFFSET */ 204 source->clean_left_offset = svq3_get_ue_golomb(gb); 205 /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ 206 source->clean_right_offset = svq3_get_ue_golomb(gb); 207 } 208 209 /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) 210 * WARNING: Some adaptation seems to be done using the 211 * AVCOL_RANGE_MPEG/JPEG values */ 212 if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */ 213 /* [DIRAC_STD] index */ 214 source->pixel_range_index = svq3_get_ue_golomb(gb); 215 216 if (source->pixel_range_index > 4U) 217 return AVERROR_INVALIDDATA; 218 219 /* This assumes either fullrange or MPEG levels only */ 220 if (!source->pixel_range_index) { 221 luma_offset = svq3_get_ue_golomb(gb); 222 luma_depth = av_log2(svq3_get_ue_golomb(gb))+1; 223 svq3_get_ue_golomb(gb); /* chroma offset */ 224 svq3_get_ue_golomb(gb); /* chroma excursion */ 225 avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; 226 } 227 } 228 /* [DIRAC_STD] Table 10.5 229 * Available signal range presets <--> pixel_range_presets */ 230 if (source->pixel_range_index > 0) { 231 idx = source->pixel_range_index-1; 232 luma_depth = pixel_range_presets[idx].bitdepth; 233 avctx->color_range = pixel_range_presets[idx].color_range; 234 } 235 236 if (luma_depth > 8) 237 av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8\n"); 238 239 avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format]; 240 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift); 241 if ((source->width % (1<<chroma_x_shift)) || (source->height % (1<<chroma_y_shift))) { 242 av_log(avctx, AV_LOG_ERROR, "Dimensions must be a integer multiply of the chroma subsampling\n"); 243 return AVERROR_INVALIDDATA; 244 } 245 246 247 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */ 248 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */ 249 /* [DIRAC_STD] index */ 250 idx = source->color_spec_index = svq3_get_ue_golomb(gb); 251 252 if (source->color_spec_index > 4U) 253 return AVERROR_INVALIDDATA; 254 255 avctx->color_primaries = dirac_color_presets[idx].color_primaries; 256 avctx->colorspace = dirac_color_presets[idx].colorspace; 257 avctx->color_trc = dirac_color_presets[idx].color_trc; 258 259 if (!source->color_spec_index) { 260 /* [DIRAC_STD] 10.3.9.1 Colour primaries */ 261 if (get_bits1(gb)) { 262 idx = svq3_get_ue_golomb(gb); 263 if (idx < 3U) 264 avctx->color_primaries = dirac_primaries[idx]; 265 } 266 /* [DIRAC_STD] 10.3.9.2 Colour matrix */ 267 if (get_bits1(gb)) { 268 idx = svq3_get_ue_golomb(gb); 269 if (!idx) 270 avctx->colorspace = AVCOL_SPC_BT709; 271 else if (idx == 1) 272 avctx->colorspace = AVCOL_SPC_BT470BG; 273 } 274 /* [DIRAC_STD] 10.3.9.3 Transfer function */ 275 if (get_bits1(gb) && !svq3_get_ue_golomb(gb)) 276 avctx->color_trc = AVCOL_TRC_BT709; 277 } 278 } else { 279 idx = source->color_spec_index; 280 avctx->color_primaries = dirac_color_presets[idx].color_primaries; 281 avctx->colorspace = dirac_color_presets[idx].colorspace; 282 avctx->color_trc = dirac_color_presets[idx].color_trc; 283 } 284 285 return 0; 286} 287 288/* [DIRAC_STD] 10. Sequence Header. sequence_header() */ 289int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, 290 dirac_source_params *source) 291{ 292 unsigned version_major; 293 unsigned video_format, picture_coding_mode; 294 int ret; 295 296 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */ 297 version_major = svq3_get_ue_golomb(gb); 298 svq3_get_ue_golomb(gb); /* version_minor */ 299 avctx->profile = svq3_get_ue_golomb(gb); 300 avctx->level = svq3_get_ue_golomb(gb); 301 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in 302 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */ 303 video_format = svq3_get_ue_golomb(gb); 304 305 if (version_major < 2) 306 av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n"); 307 else if (version_major > 2) 308 av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n"); 309 310 if (video_format > 20U) 311 return AVERROR_INVALIDDATA; 312 313 /* Fill in defaults for the source parameters. */ 314 *source = dirac_source_parameters_defaults[video_format]; 315 316 /* [DIRAC_STD] 10.3 Source Parameters 317 * Override the defaults. */ 318 if (ret = parse_source_parameters(avctx, gb, source)) 319 return ret; 320 321 ret = ff_set_dimensions(avctx, source->width, source->height); 322 if (ret < 0) 323 return ret; 324 325 ff_set_sar(avctx, avctx->sample_aspect_ratio); 326 327 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames 328 * currently only used to signal field coding */ 329 picture_coding_mode = svq3_get_ue_golomb(gb); 330 if (picture_coding_mode != 0) { 331 av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n", 332 picture_coding_mode); 333 return AVERROR_INVALIDDATA; 334 } 335 return 0; 336} 337