| 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 | |
| 31 | #include "avcodec.h" |
| 32 | #include "dirac.h" |
| 33 | #include "golomb.h" |
| 34 | #include "internal.h" |
| 35 | #include "mpeg12data.h" |
| 36 | |
| 37 | /* defaults for source parameters */ |
| 38 | static const dirac_source_params dirac_source_parameters_defaults[] = { |
| 39 | { 640, 480, 2, 0, 0, 1, 1, 640, 480, 0, 0, 1, 0 }, |
| 40 | { 176, 120, 2, 0, 0, 9, 2, 176, 120, 0, 0, 1, 1 }, |
| 41 | { 176, 144, 2, 0, 1, 10, 3, 176, 144, 0, 0, 1, 2 }, |
| 42 | { 352, 240, 2, 0, 0, 9, 2, 352, 240, 0, 0, 1, 1 }, |
| 43 | { 352, 288, 2, 0, 1, 10, 3, 352, 288, 0, 0, 1, 2 }, |
| 44 | { 704, 480, 2, 0, 0, 9, 2, 704, 480, 0, 0, 1, 1 }, |
| 45 | { 704, 576, 2, 0, 1, 10, 3, 704, 576, 0, 0, 1, 2 }, |
| 46 | { 720, 480, 1, 1, 0, 4, 2, 704, 480, 8, 0, 3, 1 }, |
| 47 | { 720, 576, 1, 1, 1, 3, 3, 704, 576, 8, 0, 3, 2 }, |
| 48 | |
| 49 | { 1280, 720, 1, 0, 1, 7, 1, 1280, 720, 0, 0, 3, 3 }, |
| 50 | { 1280, 720, 1, 0, 1, 6, 1, 1280, 720, 0, 0, 3, 3 }, |
| 51 | { 1920, 1080, 1, 1, 1, 4, 1, 1920, 1080, 0, 0, 3, 3 }, |
| 52 | { 1920, 1080, 1, 1, 1, 3, 1, 1920, 1080, 0, 0, 3, 3 }, |
| 53 | { 1920, 1080, 1, 0, 1, 7, 1, 1920, 1080, 0, 0, 3, 3 }, |
| 54 | { 1920, 1080, 1, 0, 1, 6, 1, 1920, 1080, 0, 0, 3, 3 }, |
| 55 | { 2048, 1080, 0, 0, 1, 2, 1, 2048, 1080, 0, 0, 4, 4 }, |
| 56 | { 4096, 2160, 0, 0, 1, 2, 1, 4096, 2160, 0, 0, 4, 4 }, |
| 57 | |
| 58 | { 3840, 2160, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, |
| 59 | { 3840, 2160, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, |
| 60 | { 7680, 4320, 1, 0, 1, 7, 1, 3840, 2160, 0, 0, 3, 3 }, |
| 61 | { 7680, 4320, 1, 0, 1, 6, 1, 3840, 2160, 0, 0, 3, 3 }, |
| 62 | }; |
| 63 | |
| 64 | /* [DIRAC_STD] Table 10.4 - Available preset pixel aspect ratio values */ |
| 65 | static const AVRational dirac_preset_aspect_ratios[] = { |
| 66 | { 1, 1 }, |
| 67 | { 10, 11 }, |
| 68 | { 12, 11 }, |
| 69 | { 40, 33 }, |
| 70 | { 16, 11 }, |
| 71 | { 4, 3 }, |
| 72 | }; |
| 73 | |
| 74 | /* [DIRAC_STD] Values 9,10 of 10.3.5 Frame Rate. |
| 75 | * Table 10.3 Available preset frame rate values |
| 76 | */ |
| 77 | static const AVRational dirac_frame_rate[] = { |
| 78 | { 15000, 1001 }, |
| 79 | { 25, 2 }, |
| 80 | }; |
| 81 | |
| 82 | /* [DIRAC_STD] This should be equivalent to Table 10.5 Available signal |
| 83 | * range presets */ |
| 84 | static const struct { |
| 85 | uint8_t bitdepth; |
| 86 | enum AVColorRange color_range; |
| 87 | } pixel_range_presets[] = { |
| 88 | { 8, AVCOL_RANGE_JPEG }, |
| 89 | { 8, AVCOL_RANGE_MPEG }, |
| 90 | { 10, AVCOL_RANGE_MPEG }, |
| 91 | { 12, AVCOL_RANGE_MPEG }, |
| 92 | }; |
| 93 | |
| 94 | static const enum AVColorPrimaries dirac_primaries[] = { |
| 95 | AVCOL_PRI_BT709, |
| 96 | AVCOL_PRI_SMPTE170M, |
| 97 | AVCOL_PRI_BT470BG, |
| 98 | }; |
| 99 | |
| 100 | static const struct { |
| 101 | enum AVColorPrimaries color_primaries; |
| 102 | enum AVColorSpace colorspace; |
| 103 | enum AVColorTransferCharacteristic color_trc; |
| 104 | } dirac_color_presets[] = { |
| 105 | { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, |
| 106 | { AVCOL_PRI_SMPTE170M, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, |
| 107 | { AVCOL_PRI_BT470BG, AVCOL_SPC_BT470BG, AVCOL_TRC_BT709 }, |
| 108 | { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_BT709 }, |
| 109 | { AVCOL_PRI_BT709, AVCOL_SPC_BT709, AVCOL_TRC_UNSPECIFIED /* DCinema */ }, |
| 110 | }; |
| 111 | |
| 112 | /* [DIRAC_STD] Table 10.2 Supported chroma sampling formats + luma Offset */ |
| 113 | static const enum AVPixelFormat dirac_pix_fmt[2][3] = { |
| 114 | { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P }, |
| 115 | { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P }, |
| 116 | }; |
| 117 | |
| 118 | /* [DIRAC_STD] 10.3 Parse Source Parameters. |
| 119 | * source_parameters(base_video_format) */ |
| 120 | static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb, |
| 121 | dirac_source_params *source) |
| 122 | { |
| 123 | AVRational frame_rate = { 0, 0 }; |
| 124 | unsigned luma_depth = 8, luma_offset = 16; |
| 125 | int idx; |
| 126 | int chroma_x_shift, chroma_y_shift; |
| 127 | |
| 128 | /* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */ |
| 129 | /* [DIRAC_STD] custom_dimensions_flag */ |
| 130 | if (get_bits1(gb)) { |
| 131 | source->width = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_WIDTH */ |
| 132 | source->height = svq3_get_ue_golomb(gb); /* [DIRAC_STD] FRAME_HEIGHT */ |
| 133 | } |
| 134 | |
| 135 | /* [DIRAC_STD] 10.3.3 Chroma Sampling Format. |
| 136 | * chroma_sampling_format(video_params) */ |
| 137 | /* [DIRAC_STD] custom_chroma_format_flag */ |
| 138 | if (get_bits1(gb)) |
| 139 | /* [DIRAC_STD] CHROMA_FORMAT_INDEX */ |
| 140 | source->chroma_format = svq3_get_ue_golomb(gb); |
| 141 | if (source->chroma_format > 2U) { |
| 142 | av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n", |
| 143 | source->chroma_format); |
| 144 | return AVERROR_INVALIDDATA; |
| 145 | } |
| 146 | |
| 147 | /* [DIRAC_STD] 10.3.4 Scan Format. scan_format(video_params) */ |
| 148 | /* [DIRAC_STD] custom_scan_format_flag */ |
| 149 | if (get_bits1(gb)) |
| 150 | /* [DIRAC_STD] SOURCE_SAMPLING */ |
| 151 | source->interlaced = svq3_get_ue_golomb(gb); |
| 152 | if (source->interlaced > 1U) |
| 153 | return AVERROR_INVALIDDATA; |
| 154 | |
| 155 | /* [DIRAC_STD] 10.3.5 Frame Rate. frame_rate(video_params) */ |
| 156 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_frame_rate_flag */ |
| 157 | source->frame_rate_index = svq3_get_ue_golomb(gb); |
| 158 | |
| 159 | if (source->frame_rate_index > 10U) |
| 160 | return AVERROR_INVALIDDATA; |
| 161 | |
| 162 | if (!source->frame_rate_index) { |
| 163 | /* [DIRAC_STD] FRAME_RATE_NUMER */ |
| 164 | frame_rate.num = svq3_get_ue_golomb(gb); |
| 165 | /* [DIRAC_STD] FRAME_RATE_DENOM */ |
| 166 | frame_rate.den = svq3_get_ue_golomb(gb); |
| 167 | } |
| 168 | } |
| 169 | /* [DIRAC_STD] preset_frame_rate(video_params, index) */ |
| 170 | if (source->frame_rate_index > 0) { |
| 171 | if (source->frame_rate_index <= 8) |
| 172 | frame_rate = ff_mpeg12_frame_rate_tab[source->frame_rate_index]; |
| 173 | else |
| 174 | /* [DIRAC_STD] Table 10.3 values 9-10 */ |
| 175 | frame_rate = dirac_frame_rate[source->frame_rate_index - 9]; |
| 176 | } |
| 177 | avctx->framerate = frame_rate; |
| 178 | |
| 179 | /* [DIRAC_STD] 10.3.6 Pixel Aspect Ratio. |
| 180 | * pixel_aspect_ratio(video_params) */ |
| 181 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_pixel_aspect_ratio_flag */ |
| 182 | /* [DIRAC_STD] index */ |
| 183 | source->aspect_ratio_index = svq3_get_ue_golomb(gb); |
| 184 | |
| 185 | if (source->aspect_ratio_index > 6U) |
| 186 | return AVERROR_INVALIDDATA; |
| 187 | |
| 188 | if (!source->aspect_ratio_index) { |
| 189 | avctx->sample_aspect_ratio.num = svq3_get_ue_golomb(gb); |
| 190 | avctx->sample_aspect_ratio.den = svq3_get_ue_golomb(gb); |
| 191 | } |
| 192 | } |
| 193 | /* [DIRAC_STD] Take value from Table 10.4 Available preset pixel |
| 194 | * aspect ratio values */ |
| 195 | if (source->aspect_ratio_index > 0) |
| 196 | avctx->sample_aspect_ratio = |
| 197 | dirac_preset_aspect_ratios[source->aspect_ratio_index - 1]; |
| 198 | |
| 199 | /* [DIRAC_STD] 10.3.7 Clean area. clean_area(video_params) */ |
| 200 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_clean_area_flag */ |
| 201 | /* [DIRAC_STD] CLEAN_WIDTH */ |
| 202 | source->clean_width = svq3_get_ue_golomb(gb); |
| 203 | /* [DIRAC_STD] CLEAN_HEIGHT */ |
| 204 | source->clean_height = svq3_get_ue_golomb(gb); |
| 205 | /* [DIRAC_STD] CLEAN_LEFT_OFFSET */ |
| 206 | source->clean_left_offset = svq3_get_ue_golomb(gb); |
| 207 | /* [DIRAC_STD] CLEAN_RIGHT_OFFSET */ |
| 208 | source->clean_right_offset = svq3_get_ue_golomb(gb); |
| 209 | } |
| 210 | |
| 211 | /* [DIRAC_STD] 10.3.8 Signal range. signal_range(video_params) |
| 212 | * WARNING: Some adaptation seems to be done using the |
| 213 | * AVCOL_RANGE_MPEG/JPEG values */ |
| 214 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_signal_range_flag */ |
| 215 | /* [DIRAC_STD] index */ |
| 216 | source->pixel_range_index = svq3_get_ue_golomb(gb); |
| 217 | |
| 218 | if (source->pixel_range_index > 4U) |
| 219 | return AVERROR_INVALIDDATA; |
| 220 | |
| 221 | /* This assumes either fullrange or MPEG levels only */ |
| 222 | if (!source->pixel_range_index) { |
| 223 | luma_offset = svq3_get_ue_golomb(gb); |
| 224 | luma_depth = av_log2(svq3_get_ue_golomb(gb)) + 1; |
| 225 | svq3_get_ue_golomb(gb); /* chroma offset */ |
| 226 | svq3_get_ue_golomb(gb); /* chroma excursion */ |
| 227 | avctx->color_range = luma_offset ? AVCOL_RANGE_MPEG |
| 228 | : AVCOL_RANGE_JPEG; |
| 229 | } |
| 230 | } |
| 231 | /* [DIRAC_STD] Table 10.5 |
| 232 | * Available signal range presets <--> pixel_range_presets */ |
| 233 | if (source->pixel_range_index > 0) { |
| 234 | idx = source->pixel_range_index - 1; |
| 235 | luma_depth = pixel_range_presets[idx].bitdepth; |
| 236 | avctx->color_range = pixel_range_presets[idx].color_range; |
| 237 | } |
| 238 | |
| 239 | if (luma_depth > 8) |
| 240 | av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8\n"); |
| 241 | |
| 242 | avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format]; |
| 243 | avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift); |
| 244 | if ((source->width % (1<<chroma_x_shift)) || (source->height % (1<<chroma_y_shift))) { |
| 245 | av_log(avctx, AV_LOG_ERROR, "Dimensions must be an integer multiple of the chroma subsampling\n"); |
| 246 | return AVERROR_INVALIDDATA; |
| 247 | } |
| 248 | |
| 249 | |
| 250 | /* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */ |
| 251 | if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */ |
| 252 | /* [DIRAC_STD] index */ |
| 253 | idx = source->color_spec_index = svq3_get_ue_golomb(gb); |
| 254 | |
| 255 | if (source->color_spec_index > 4U) |
| 256 | return AVERROR_INVALIDDATA; |
| 257 | |
| 258 | avctx->color_primaries = dirac_color_presets[idx].color_primaries; |
| 259 | avctx->colorspace = dirac_color_presets[idx].colorspace; |
| 260 | avctx->color_trc = dirac_color_presets[idx].color_trc; |
| 261 | |
| 262 | if (!source->color_spec_index) { |
| 263 | /* [DIRAC_STD] 10.3.9.1 Colour primaries */ |
| 264 | if (get_bits1(gb)) { |
| 265 | idx = svq3_get_ue_golomb(gb); |
| 266 | if (idx < 3U) |
| 267 | avctx->color_primaries = dirac_primaries[idx]; |
| 268 | } |
| 269 | /* [DIRAC_STD] 10.3.9.2 Colour matrix */ |
| 270 | if (get_bits1(gb)) { |
| 271 | idx = svq3_get_ue_golomb(gb); |
| 272 | if (!idx) |
| 273 | avctx->colorspace = AVCOL_SPC_BT709; |
| 274 | else if (idx == 1) |
| 275 | avctx->colorspace = AVCOL_SPC_BT470BG; |
| 276 | } |
| 277 | /* [DIRAC_STD] 10.3.9.3 Transfer function */ |
| 278 | if (get_bits1(gb) && !svq3_get_ue_golomb(gb)) |
| 279 | avctx->color_trc = AVCOL_TRC_BT709; |
| 280 | } |
| 281 | } else { |
| 282 | idx = source->color_spec_index; |
| 283 | avctx->color_primaries = dirac_color_presets[idx].color_primaries; |
| 284 | avctx->colorspace = dirac_color_presets[idx].colorspace; |
| 285 | avctx->color_trc = dirac_color_presets[idx].color_trc; |
| 286 | } |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | /* [DIRAC_STD] 10. Sequence Header. sequence_header() */ |
| 292 | int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb, |
| 293 | dirac_source_params *source) |
| 294 | { |
| 295 | unsigned version_major; |
| 296 | unsigned video_format, picture_coding_mode; |
| 297 | int ret; |
| 298 | |
| 299 | /* [DIRAC_SPEC] 10.1 Parse Parameters. parse_parameters() */ |
| 300 | version_major = svq3_get_ue_golomb(gb); |
| 301 | svq3_get_ue_golomb(gb); /* version_minor */ |
| 302 | avctx->profile = svq3_get_ue_golomb(gb); |
| 303 | avctx->level = svq3_get_ue_golomb(gb); |
| 304 | /* [DIRAC_SPEC] sequence_header() -> base_video_format as defined in |
| 305 | * 10.2 Base Video Format, table 10.1 Dirac predefined video formats */ |
| 306 | video_format = svq3_get_ue_golomb(gb); |
| 307 | |
| 308 | if (version_major < 2) |
| 309 | av_log(avctx, AV_LOG_WARNING, "Stream is old and may not work\n"); |
| 310 | else if (version_major > 2) |
| 311 | av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n"); |
| 312 | |
| 313 | if (video_format > 20U) |
| 314 | return AVERROR_INVALIDDATA; |
| 315 | |
| 316 | /* Fill in defaults for the source parameters. */ |
| 317 | *source = dirac_source_parameters_defaults[video_format]; |
| 318 | |
| 319 | /* [DIRAC_STD] 10.3 Source Parameters |
| 320 | * Override the defaults. */ |
| 321 | if (ret = parse_source_parameters(avctx, gb, source)) |
| 322 | return ret; |
| 323 | |
| 324 | ret = ff_set_dimensions(avctx, source->width, source->height); |
| 325 | if (ret < 0) |
| 326 | return ret; |
| 327 | |
| 328 | ff_set_sar(avctx, avctx->sample_aspect_ratio); |
| 329 | |
| 330 | /* [DIRAC_STD] picture_coding_mode shall be 0 for fields and 1 for frames |
| 331 | * currently only used to signal field coding */ |
| 332 | picture_coding_mode = svq3_get_ue_golomb(gb); |
| 333 | if (picture_coding_mode != 0) { |
| 334 | av_log(avctx, AV_LOG_ERROR, "Unsupported picture coding mode %d\n", |
| 335 | picture_coding_mode); |
| 336 | return AVERROR_INVALIDDATA; |
| 337 | } |
| 338 | return 0; |
| 339 | } |