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/pixdesc.h" 30 31#include "dirac.h" 32#include "golomb.h" 33#include "mpeg12data.h" 34 35#if CONFIG_DIRAC_PARSE 36 37typedef struct dirac_source_params { 38 unsigned width; 39 unsigned height; 40 uint8_t chroma_format; ///< 0: 444 1: 422 2: 420 41 42 uint8_t interlaced; 43 uint8_t top_field_first; 44 45 uint8_t frame_rate_index; ///< index into dirac_frame_rate[] 46 uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[] 47 48 uint16_t clean_width; 49 uint16_t clean_height; 50 uint16_t clean_left_offset; 51 uint16_t clean_right_offset; 52 53 uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[] 54 uint8_t color_spec_index; ///< index into dirac_color_spec_presets[] 55} dirac_source_params; 56 57/* defaults for source parameters */ 58static const dirac_source_params dirac_source_parameters_defaults[] = { 59 { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 }, 60 { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 }, 61 { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 }, 62 { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 }, 63 { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 }, 64 { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 }, 65 { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 }, 66 { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 }, 67 { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 }, 68 69 { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 }, 70 { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 }, 71 { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 }, 72 { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 }, 73 { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 }, 74 { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 }, 75 { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 }, 76 { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 }, 77 78 { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, 79 { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, 80 { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, 81 { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, 82}; 83 84/* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */ 85static const AVRational dirac_preset_aspect_ratios[] = { 86 { 1, 1 }, 87 { 10, 11 }, 88 { 12, 11 }, 89 { 40, 33 }, 90 { 16, 11 }, 91 { 4, 3 }, 92}; 93 94/* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate. 95 * Table 10.3 Available preset frame rate values 96 */ 97static const AVRational dirac_frame_rate[] = { 98 { 15000, 1001 }, 99 { 25, 2 }, 100}; 101 102/* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal 103 * range presets */ 104static const struct { 105 uint8_t bitdepth; 106 enum AVColorRange color_range; 107} pixel_range_presets[] = { 108 { 8, AVCOL_RANGE_JPEG }, 109 { 8, AVCOL_RANGE_MPEG }, 110 { 10, AVCOL_RANGE_MPEG }, 111 { 12, AVCOL_RANGE_MPEG }, 112}; 113 114static const enum AVColorPrimaries dirac_primaries[] = { 115 AVCOL_PRI_BT709, 116 AVCOL_PRI_SMPTE170M, 117 AVCOL_PRI_BT470BG, 118}; 119 120static const struct { 121 enum AVColorPrimaries color_primaries; 122 enum AVColorSpace colorspace; 123 enum AVColorTransferCharacteristic color_trc; 124} dirac_color_presets[] = { 125 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, 126 { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, 127 { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, 128 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, 129 { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ }, 130}; 131 132/* [DIRAC_STD] Table 10.2 Supported chroma sampling formats */ 133static const enum AVPixelFormat dirac_pix_fmt[][3] = { 134 {AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12}, 135 {AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12}, 136 {AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12}, 137}; 138 139/* [DIRAC_STD] 10.3 Parse Source Parameters. 140 * source_parameters(base_video_format) */ 141static int parse_source_parameters(AVDiracSeqHeader *dsh, GetBitContext *gb, 142 void *log_ctx) 143{ 144 AVRational frame_rate = { 0, 0 }; 145 unsigned luma_depth = 8, luma_offset = 16; 146 int idx; 147 int chroma_x_shift, chroma_y_shift; 148 int ret; 149 150 /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ 151 /* [DIRAC_STD] custom_dimensions_flag */ 152 if (get_bits1(gb)) { 153 dsh->width = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ 154 dsh->height = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ 155 } 156 157 /* [DIRAC_STD] 10.3.3 Chroma Sampling Format. 158 * chroma_sampling_format(video_params) */ 159 /* [DIRAC_STD] custom_chroma_format_flag */ 160 if (get_bits1(gb)) 161 /* [DIRAC_STD] CHROMA_FORMAT_INDEX */ 162 dsh->chroma_format = get_interleaved_ue_golomb(gb); 163 if (dsh->chroma_format > 2U) { 164 if (log_ctx) 165 av_log(log_ctx, AV_LOG_ERROR, "Unknown chroma format %d\n", 166 dsh->chroma_format); 167 return AVERROR_INVALIDDATA; 168 } 169 170 /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */ 171 /* [DIRAC_STD] custom_scan_format_flag */ 172 if (get_bits1(gb)) 173 /* [DIRAC_STD] SOURCE_SAMPLING */ 174 dsh->interlaced = get_interleaved_ue_golomb(gb); 175 if (dsh->interlaced > 1U) 176 return AVERROR_INVALIDDATA; 177 178 /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */ 179 if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */ 180 dsh->frame_rate_index = get_interleaved_ue_golomb(gb); 181 182 if (dsh->frame_rate_index > 10U) 183 return AVERROR_INVALIDDATA; 184 185 if (!dsh->frame_rate_index) { 186 /* [DIRAC_STD] FRAME_RATE_NUMER */ 187 frame_rate.num = get_interleaved_ue_golomb(gb); 188 /* [DIRAC_STD] FRAME_RATE_DENOM */ 189 frame_rate.den = get_interleaved_ue_golomb(gb); 190 } 191 } 192 /* [DIRAC_STD] preset_frame_rate(video_params, index) */ 193 if (dsh->frame_rate_index > 0) { 194 if (dsh->frame_rate_index <= 8) 195 frame_rate = ff_mpeg12_frame_rate_tab[dsh->frame_rate_index]; 196 else 197 /* [DIRAC_STD] Table 10.3 values 9-10 */ 198 frame_rate = dirac_frame_rate[dsh->frame_rate_index - 9]; 199 } 200 dsh->framerate = frame_rate; 201 202 /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. 203 * pixel_aspect_ratio(video_params) */ 204 if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ 205 /* [DIRAC_STD] index */ 206 dsh->aspect_ratio_index = get_interleaved_ue_golomb(gb); 207 208 if (dsh->aspect_ratio_index > 6U) 209 return AVERROR_INVALIDDATA; 210 211 if (!dsh->aspect_ratio_index) { 212 dsh->sample_aspect_ratio.num = get_interleaved_ue_golomb(gb); 213 dsh->sample_aspect_ratio.den = get_interleaved_ue_golomb(gb); 214 } 215 } 216 /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel 217 * aspect ratio values */ 218 if (dsh->aspect_ratio_index > 0) 219 dsh->sample_aspect_ratio = 220 dirac_preset_aspect_ratios[dsh->aspect_ratio_index - 1]; 221 222 /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */ 223 if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */ 224 /* [DIRAC_STD] CLEAN_WIDTH */ 225 dsh->clean_width = get_interleaved_ue_golomb(gb); 226 /* [DIRAC_STD] CLEAN_HEIGHT */ 227 dsh->clean_height = get_interleaved_ue_golomb(gb); 228 /* [DIRAC_STD] CLEAN_LEFT_OFFSET */ 229 dsh->clean_left_offset = get_interleaved_ue_golomb(gb); 230 /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ 231 dsh->clean_right_offset = get_interleaved_ue_golomb(gb); 232 } 233 234 /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) 235 * WARNING: Some adaptation seems to be done using the 236 * AVCOL_RANGE_MPEG/JPEG values */ 237 if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */ 238 /* [DIRAC_STD] index */ 239 dsh->pixel_range_index = get_interleaved_ue_golomb(gb); 240 241 if (dsh->pixel_range_index > 4U) 242 return AVERROR_INVALIDDATA; 243 244 /* This assumes either fullrange or MPEG levels only */ 245 if (!dsh->pixel_range_index) { 246 luma_offset = get_interleaved_ue_golomb(gb); 247 luma_depth = av_log2(get_interleaved_ue_golomb(gb)) + 1; 248 get_interleaved_ue_golomb(gb); /* chroma offset */ 249 get_interleaved_ue_golomb(gb); /* chroma excursion */ 250 dsh->color_range = luma_offset ? AVCOL_RANGE_MPEG 251 : AVCOL_RANGE_JPEG; 252 } 253 } 254 /* [DIRAC_STD] Table 10.5 255 * Available signal range presets <--> pixel_range_presets */ 256 if (dsh->pixel_range_index > 0) { 257 idx = dsh->pixel_range_index - 1; 258 luma_depth = pixel_range_presets[idx].bitdepth; 259 dsh->color_range = pixel_range_presets[idx].color_range; 260 } 261 262 dsh->bit_depth = luma_depth; 263 264 /* Full range 8 bts uses the same pix_fmts as limited range 8 bits */ 265 dsh->pixel_range_index += dsh->pixel_range_index == 1; 266 267 if (dsh->pixel_range_index < 2U) 268 return AVERROR_INVALIDDATA; 269 270 dsh->pix_fmt = dirac_pix_fmt[dsh->chroma_format][dsh->pixel_range_index-2]; 271 ret = av_pix_fmt_get_chroma_sub_sample(dsh->pix_fmt, &chroma_x_shift, &chroma_y_shift); 272 if (ret) 273 return ret; 274 275 if ((dsh->width % (1<<chroma_x_shift)) || (dsh->height % (1<<chroma_y_shift))) { 276 if (log_ctx) 277 av_log(log_ctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n"); 278 return AVERROR_INVALIDDATA; 279 } 280 281 /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */ 282 if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */ 283 /* [DIRAC_STD] index */ 284 idx = dsh->color_spec_index = get_interleaved_ue_golomb(gb); 285 286 if (dsh->color_spec_index > 4U) 287 return AVERROR_INVALIDDATA; 288 289 dsh->color_primaries = dirac_color_presets[idx].color_primaries; 290 dsh->colorspace = dirac_color_presets[idx].colorspace; 291 dsh->color_trc = dirac_color_presets[idx].color_trc; 292 293 if (!dsh->color_spec_index) { 294 /* [DIRAC_STD] 10.3.9.1 Colour primaries */ 295 if (get_bits1(gb)) { 296 idx = get_interleaved_ue_golomb(gb); 297 if (idx < 3U) 298 dsh->color_primaries = dirac_primaries[idx]; 299 } 300 /* [DIRAC_STD] 10.3.9.2 Colour matrix */ 301 if (get_bits1(gb)) { 302 idx = get_interleaved_ue_golomb(gb); 303 if (!idx) 304 dsh->colorspace = AVCOL_SPC_BT709; 305 else if (idx == 1) 306 dsh->colorspace = AVCOL_SPC_BT470BG; 307 } 308 /* [DIRAC_STD] 10.3.9.3 Transfer function */ 309 if (get_bits1(gb) && !get_interleaved_ue_golomb(gb)) 310 dsh->color_trc = AVCOL_TRC_BT709; 311 } 312 } else { 313 idx = dsh->color_spec_index; 314 dsh->color_primaries = dirac_color_presets[idx].color_primaries; 315 dsh->colorspace = dirac_color_presets[idx].colorspace; 316 dsh->color_trc = dirac_color_presets[idx].color_trc; 317 } 318 319 return 0; 320} 321 322/* [DIRAC_STD] 10. Sequence Header. sequence_header() */ 323int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh, 324 const uint8_t *buf, size_t buf_size, 325 void *log_ctx) 326{ 327 AVDiracSeqHeader *dsh; 328 GetBitContext gb; 329 unsigned video_format, picture_coding_mode; 330 int ret; 331 332 dsh = av_mallocz(sizeof(*dsh)); 333 if (!dsh) 334 return AVERROR(ENOMEM); 335 336 ret = init_get_bits8(&gb, buf, buf_size); 337 if (ret < 0) 338 goto fail; 339 340 /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */ 341 dsh->version.major = get_interleaved_ue_golomb(&gb); 342 dsh->version.minor = get_interleaved_ue_golomb(&gb); 343 dsh->profile = get_interleaved_ue_golomb(&gb); 344 dsh->level = get_interleaved_ue_golomb(&gb); 345 /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in 346 * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */ 347 video_format = get_interleaved_ue_golomb(&gb); 348 349 if (dsh->version.major < 2 && log_ctx) 350 av_log(log_ctx, AV_LOG_WARNING, "Stream is old and may not work\n"); 351 else if (dsh->version.major > 2 && log_ctx) 352 av_log(log_ctx, AV_LOG_WARNING, "Stream may have unhandled features\n"); 353 354 if (video_format > 20U) { 355 ret = AVERROR_INVALIDDATA; 356 goto fail; 357 } 358 359 /* Fill in defaults for the source parameters. */ 360 dsh->width = dirac_source_parameters_defaults[video_format].width; 361 dsh->height = dirac_source_parameters_defaults[video_format].height; 362 dsh->chroma_format = dirac_source_parameters_defaults[video_format].chroma_format; 363 dsh->interlaced = dirac_source_parameters_defaults[video_format].interlaced; 364 dsh->top_field_first = dirac_source_parameters_defaults[video_format].top_field_first; 365 dsh->frame_rate_index = dirac_source_parameters_defaults[video_format].frame_rate_index; 366 dsh->aspect_ratio_index = dirac_source_parameters_defaults[video_format].aspect_ratio_index; 367 dsh->clean_width = dirac_source_parameters_defaults[video_format].clean_width; 368 dsh->clean_height = dirac_source_parameters_defaults[video_format].clean_height; 369 dsh->clean_left_offset = dirac_source_parameters_defaults[video_format].clean_left_offset; 370 dsh->clean_right_offset = dirac_source_parameters_defaults[video_format].clean_right_offset; 371 dsh->pixel_range_index = dirac_source_parameters_defaults[video_format].pixel_range_index; 372 dsh->color_spec_index = dirac_source_parameters_defaults[video_format].color_spec_index; 373 374 /* [DIRAC_STD] 10.3 Source Parameters 375 * Override the defaults. */ 376 ret = parse_source_parameters(dsh, &gb, log_ctx); 377 if (ret < 0) 378 goto fail; 379 380 /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames 381 * currently only used to signal field coding */ 382 picture_coding_mode = get_interleaved_ue_golomb(&gb); 383 if (picture_coding_mode != 0) { 384 if (log_ctx) { 385 av_log(log_ctx, AV_LOG_ERROR, "Unsupported picture coding mode %d", 386 picture_coding_mode); 387 } 388 ret = AVERROR_INVALIDDATA; 389 goto fail; 390 } 391 392 *pdsh = dsh; 393 return 0; 394fail: 395 av_freep(&dsh); 396 *pdsh = NULL; 397 return ret; 398} 399#else 400int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh, 401 const uint8_t *buf, size_t buf_size, 402 void *log_ctx) 403{ 404 return AVERROR(ENOSYS); 405} 406#endif 407