| 1 | /* |
| 2 | * R3D REDCODE demuxer |
| 3 | * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "libavutil/intreadwrite.h" |
| 23 | #include "libavutil/dict.h" |
| 24 | #include "libavutil/mathematics.h" |
| 25 | #include "avformat.h" |
| 26 | #include "internal.h" |
| 27 | |
| 28 | typedef struct { |
| 29 | unsigned video_offsets_count; |
| 30 | unsigned *video_offsets; |
| 31 | unsigned rdvo_offset; |
| 32 | } R3DContext; |
| 33 | |
| 34 | typedef struct { |
| 35 | unsigned size; |
| 36 | uint32_t tag; |
| 37 | uint64_t offset; |
| 38 | } Atom; |
| 39 | |
| 40 | static int read_atom(AVFormatContext *s, Atom *atom) |
| 41 | { |
| 42 | atom->offset = avio_tell(s->pb); |
| 43 | atom->size = avio_rb32(s->pb); |
| 44 | if (atom->size < 8) |
| 45 | return -1; |
| 46 | atom->tag = avio_rl32(s->pb); |
| 47 | av_dlog(s, "atom %u %.4s offset %#"PRIx64"\n", |
| 48 | atom->size, (char*)&atom->tag, atom->offset); |
| 49 | return atom->size; |
| 50 | } |
| 51 | |
| 52 | static int r3d_read_red1(AVFormatContext *s) |
| 53 | { |
| 54 | AVStream *st = avformat_new_stream(s, NULL); |
| 55 | char filename[258]; |
| 56 | int tmp; |
| 57 | int av_unused tmp2; |
| 58 | AVRational framerate; |
| 59 | |
| 60 | if (!st) |
| 61 | return AVERROR(ENOMEM); |
| 62 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 63 | st->codec->codec_id = AV_CODEC_ID_JPEG2000; |
| 64 | |
| 65 | tmp = avio_r8(s->pb); // major version |
| 66 | tmp2 = avio_r8(s->pb); // minor version |
| 67 | av_dlog(s, "version %d.%d\n", tmp, tmp2); |
| 68 | |
| 69 | tmp = avio_rb16(s->pb); // unknown |
| 70 | av_dlog(s, "unknown1 %d\n", tmp); |
| 71 | |
| 72 | tmp = avio_rb32(s->pb); |
| 73 | avpriv_set_pts_info(st, 32, 1, tmp); |
| 74 | |
| 75 | tmp = avio_rb32(s->pb); // filenum |
| 76 | av_dlog(s, "filenum %d\n", tmp); |
| 77 | |
| 78 | avio_skip(s->pb, 32); // unknown |
| 79 | |
| 80 | st->codec->width = avio_rb32(s->pb); |
| 81 | st->codec->height = avio_rb32(s->pb); |
| 82 | |
| 83 | tmp = avio_rb16(s->pb); // unknown |
| 84 | av_dlog(s, "unknown2 %d\n", tmp); |
| 85 | |
| 86 | framerate.num = avio_rb16(s->pb); |
| 87 | framerate.den = avio_rb16(s->pb); |
| 88 | if (framerate.num > 0 && framerate.den > 0) { |
| 89 | #if FF_API_R_FRAME_RATE |
| 90 | st->r_frame_rate = |
| 91 | #endif |
| 92 | st->avg_frame_rate = framerate; |
| 93 | } |
| 94 | |
| 95 | tmp = avio_r8(s->pb); // audio channels |
| 96 | av_dlog(s, "audio channels %d\n", tmp); |
| 97 | if (tmp > 0) { |
| 98 | AVStream *ast = avformat_new_stream(s, NULL); |
| 99 | if (!ast) |
| 100 | return AVERROR(ENOMEM); |
| 101 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 102 | ast->codec->codec_id = AV_CODEC_ID_PCM_S32BE; |
| 103 | ast->codec->channels = tmp; |
| 104 | avpriv_set_pts_info(ast, 32, 1, st->time_base.den); |
| 105 | } |
| 106 | |
| 107 | avio_read(s->pb, filename, 257); |
| 108 | filename[sizeof(filename)-1] = 0; |
| 109 | av_dict_set(&st->metadata, "filename", filename, 0); |
| 110 | |
| 111 | av_dlog(s, "filename %s\n", filename); |
| 112 | av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height); |
| 113 | av_dlog(s, "timescale %d\n", st->time_base.den); |
| 114 | av_dlog(s, "frame rate %d/%d\n", |
| 115 | framerate.num, framerate.den); |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static int r3d_read_rdvo(AVFormatContext *s, Atom *atom) |
| 121 | { |
| 122 | R3DContext *r3d = s->priv_data; |
| 123 | AVStream *st = s->streams[0]; |
| 124 | int i; |
| 125 | |
| 126 | r3d->video_offsets_count = (atom->size - 8) / 4; |
| 127 | r3d->video_offsets = av_malloc(atom->size); |
| 128 | if (!r3d->video_offsets) |
| 129 | return AVERROR(ENOMEM); |
| 130 | |
| 131 | for (i = 0; i < r3d->video_offsets_count; i++) { |
| 132 | r3d->video_offsets[i] = avio_rb32(s->pb); |
| 133 | if (!r3d->video_offsets[i]) { |
| 134 | r3d->video_offsets_count = i; |
| 135 | break; |
| 136 | } |
| 137 | av_dlog(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]); |
| 138 | } |
| 139 | |
| 140 | if (st->avg_frame_rate.num) |
| 141 | st->duration = av_rescale_q(r3d->video_offsets_count, |
| 142 | av_inv_q(st->avg_frame_rate), |
| 143 | st->time_base); |
| 144 | av_dlog(s, "duration %"PRId64"\n", st->duration); |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static void r3d_read_reos(AVFormatContext *s) |
| 150 | { |
| 151 | R3DContext *r3d = s->priv_data; |
| 152 | int av_unused tmp; |
| 153 | |
| 154 | r3d->rdvo_offset = avio_rb32(s->pb); |
| 155 | avio_rb32(s->pb); // rdvs offset |
| 156 | avio_rb32(s->pb); // rdao offset |
| 157 | avio_rb32(s->pb); // rdas offset |
| 158 | |
| 159 | tmp = avio_rb32(s->pb); |
| 160 | av_dlog(s, "num video chunks %d\n", tmp); |
| 161 | |
| 162 | tmp = avio_rb32(s->pb); |
| 163 | av_dlog(s, "num audio chunks %d\n", tmp); |
| 164 | |
| 165 | avio_skip(s->pb, 6*4); |
| 166 | } |
| 167 | |
| 168 | static int r3d_read_header(AVFormatContext *s) |
| 169 | { |
| 170 | R3DContext *r3d = s->priv_data; |
| 171 | Atom atom; |
| 172 | int ret; |
| 173 | |
| 174 | if (read_atom(s, &atom) < 0) { |
| 175 | av_log(s, AV_LOG_ERROR, "error reading atom\n"); |
| 176 | return -1; |
| 177 | } |
| 178 | if (atom.tag == MKTAG('R','E','D','1')) { |
| 179 | if ((ret = r3d_read_red1(s)) < 0) { |
| 180 | av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n"); |
| 181 | return ret; |
| 182 | } |
| 183 | } else { |
| 184 | av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n"); |
| 185 | return -1; |
| 186 | } |
| 187 | |
| 188 | s->data_offset = avio_tell(s->pb); |
| 189 | av_dlog(s, "data offset %#"PRIx64"\n", s->data_offset); |
| 190 | if (!s->pb->seekable) |
| 191 | return 0; |
| 192 | // find REOB/REOF/REOS to load index |
| 193 | avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET); |
| 194 | if (read_atom(s, &atom) < 0) |
| 195 | av_log(s, AV_LOG_ERROR, "error reading end atom\n"); |
| 196 | |
| 197 | if (atom.tag != MKTAG('R','E','O','B') && |
| 198 | atom.tag != MKTAG('R','E','O','F') && |
| 199 | atom.tag != MKTAG('R','E','O','S')) |
| 200 | goto out; |
| 201 | |
| 202 | r3d_read_reos(s); |
| 203 | |
| 204 | if (r3d->rdvo_offset) { |
| 205 | avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET); |
| 206 | if (read_atom(s, &atom) < 0) |
| 207 | av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n"); |
| 208 | if (atom.tag == MKTAG('R','D','V','O')) { |
| 209 | if (r3d_read_rdvo(s, &atom) < 0) |
| 210 | av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n"); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | out: |
| 215 | avio_seek(s->pb, s->data_offset, SEEK_SET); |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom) |
| 220 | { |
| 221 | AVStream *st = s->streams[0]; |
| 222 | int tmp; |
| 223 | int av_unused tmp2; |
| 224 | uint64_t pos = avio_tell(s->pb); |
| 225 | unsigned dts; |
| 226 | int ret; |
| 227 | |
| 228 | dts = avio_rb32(s->pb); |
| 229 | |
| 230 | tmp = avio_rb32(s->pb); |
| 231 | av_dlog(s, "frame num %d\n", tmp); |
| 232 | |
| 233 | tmp = avio_r8(s->pb); // major version |
| 234 | tmp2 = avio_r8(s->pb); // minor version |
| 235 | av_dlog(s, "version %d.%d\n", tmp, tmp2); |
| 236 | |
| 237 | tmp = avio_rb16(s->pb); // unknown |
| 238 | av_dlog(s, "unknown %d\n", tmp); |
| 239 | |
| 240 | if (tmp > 4) { |
| 241 | tmp = avio_rb16(s->pb); // unknown |
| 242 | av_dlog(s, "unknown %d\n", tmp); |
| 243 | |
| 244 | tmp = avio_rb16(s->pb); // unknown |
| 245 | av_dlog(s, "unknown %d\n", tmp); |
| 246 | |
| 247 | tmp = avio_rb32(s->pb); |
| 248 | av_dlog(s, "width %d\n", tmp); |
| 249 | tmp = avio_rb32(s->pb); |
| 250 | av_dlog(s, "height %d\n", tmp); |
| 251 | |
| 252 | tmp = avio_rb32(s->pb); |
| 253 | av_dlog(s, "metadata len %d\n", tmp); |
| 254 | } |
| 255 | tmp = atom->size - 8 - (avio_tell(s->pb) - pos); |
| 256 | if (tmp < 0) |
| 257 | return -1; |
| 258 | ret = av_get_packet(s->pb, pkt, tmp); |
| 259 | if (ret < 0) { |
| 260 | av_log(s, AV_LOG_ERROR, "error reading video packet\n"); |
| 261 | return -1; |
| 262 | } |
| 263 | |
| 264 | pkt->stream_index = 0; |
| 265 | pkt->dts = dts; |
| 266 | if (st->avg_frame_rate.num) |
| 267 | pkt->duration = (uint64_t)st->time_base.den* |
| 268 | st->avg_frame_rate.den/st->avg_frame_rate.num; |
| 269 | av_dlog(s, "pkt dts %"PRId64" duration %d\n", pkt->dts, pkt->duration); |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom) |
| 275 | { |
| 276 | AVStream *st = s->streams[1]; |
| 277 | int av_unused tmp, tmp2; |
| 278 | int samples, size; |
| 279 | uint64_t pos = avio_tell(s->pb); |
| 280 | unsigned dts; |
| 281 | int ret; |
| 282 | |
| 283 | dts = avio_rb32(s->pb); |
| 284 | |
| 285 | st->codec->sample_rate = avio_rb32(s->pb); |
| 286 | if (st->codec->sample_rate <= 0) { |
| 287 | av_log(s, AV_LOG_ERROR, "Bad sample rate\n"); |
| 288 | return AVERROR_INVALIDDATA; |
| 289 | } |
| 290 | |
| 291 | samples = avio_rb32(s->pb); |
| 292 | |
| 293 | tmp = avio_rb32(s->pb); |
| 294 | av_dlog(s, "packet num %d\n", tmp); |
| 295 | |
| 296 | tmp = avio_rb16(s->pb); // unknown |
| 297 | av_dlog(s, "unknown %d\n", tmp); |
| 298 | |
| 299 | tmp = avio_r8(s->pb); // major version |
| 300 | tmp2 = avio_r8(s->pb); // minor version |
| 301 | av_dlog(s, "version %d.%d\n", tmp, tmp2); |
| 302 | |
| 303 | tmp = avio_rb32(s->pb); // unknown |
| 304 | av_dlog(s, "unknown %d\n", tmp); |
| 305 | |
| 306 | size = atom->size - 8 - (avio_tell(s->pb) - pos); |
| 307 | if (size < 0) |
| 308 | return -1; |
| 309 | ret = av_get_packet(s->pb, pkt, size); |
| 310 | if (ret < 0) { |
| 311 | av_log(s, AV_LOG_ERROR, "error reading audio packet\n"); |
| 312 | return ret; |
| 313 | } |
| 314 | |
| 315 | pkt->stream_index = 1; |
| 316 | pkt->dts = dts; |
| 317 | if (st->codec->sample_rate) |
| 318 | pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate); |
| 319 | av_dlog(s, "pkt dts %"PRId64" duration %d samples %d sample rate %d\n", |
| 320 | pkt->dts, pkt->duration, samples, st->codec->sample_rate); |
| 321 | |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 326 | { |
| 327 | Atom atom; |
| 328 | int err = 0; |
| 329 | |
| 330 | while (!err) { |
| 331 | if (read_atom(s, &atom) < 0) { |
| 332 | err = -1; |
| 333 | break; |
| 334 | } |
| 335 | switch (atom.tag) { |
| 336 | case MKTAG('R','E','D','V'): |
| 337 | if (s->streams[0]->discard == AVDISCARD_ALL) |
| 338 | goto skip; |
| 339 | if (!(err = r3d_read_redv(s, pkt, &atom))) |
| 340 | return 0; |
| 341 | break; |
| 342 | case MKTAG('R','E','D','A'): |
| 343 | if (s->nb_streams < 2) |
| 344 | return -1; |
| 345 | if (s->streams[1]->discard == AVDISCARD_ALL) |
| 346 | goto skip; |
| 347 | if (!(err = r3d_read_reda(s, pkt, &atom))) |
| 348 | return 0; |
| 349 | break; |
| 350 | default: |
| 351 | skip: |
| 352 | avio_skip(s->pb, atom.size-8); |
| 353 | } |
| 354 | } |
| 355 | return err; |
| 356 | } |
| 357 | |
| 358 | static int r3d_probe(AVProbeData *p) |
| 359 | { |
| 360 | if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1')) |
| 361 | return AVPROBE_SCORE_MAX; |
| 362 | return 0; |
| 363 | } |
| 364 | |
| 365 | static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) |
| 366 | { |
| 367 | AVStream *st = s->streams[0]; // video stream |
| 368 | R3DContext *r3d = s->priv_data; |
| 369 | int frame_num; |
| 370 | |
| 371 | if (!st->avg_frame_rate.num) |
| 372 | return -1; |
| 373 | |
| 374 | frame_num = av_rescale_q(sample_time, st->time_base, |
| 375 | av_inv_q(st->avg_frame_rate)); |
| 376 | av_dlog(s, "seek frame num %d timestamp %"PRId64"\n", |
| 377 | frame_num, sample_time); |
| 378 | |
| 379 | if (frame_num < r3d->video_offsets_count) { |
| 380 | if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0) |
| 381 | return -1; |
| 382 | } else { |
| 383 | av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num); |
| 384 | return -1; |
| 385 | } |
| 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | static int r3d_close(AVFormatContext *s) |
| 391 | { |
| 392 | R3DContext *r3d = s->priv_data; |
| 393 | |
| 394 | av_freep(&r3d->video_offsets); |
| 395 | |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | AVInputFormat ff_r3d_demuxer = { |
| 400 | .name = "r3d", |
| 401 | .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"), |
| 402 | .priv_data_size = sizeof(R3DContext), |
| 403 | .read_probe = r3d_probe, |
| 404 | .read_header = r3d_read_header, |
| 405 | .read_packet = r3d_read_packet, |
| 406 | .read_close = r3d_close, |
| 407 | .read_seek = r3d_seek, |
| 408 | }; |