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//#define DEBUG 23 24#include "libavutil/intreadwrite.h" 25#include "avformat.h" 26 27typedef struct { 28 unsigned video_offsets_count; 29 unsigned *video_offsets; 30 unsigned rdvo_offset; 31} R3DContext; 32 33typedef struct { 34 unsigned size; 35 uint32_t tag; 36 uint64_t offset; 37} Atom; 38 39static int read_atom(AVFormatContext *s, Atom *atom) 40{ 41 atom->offset = url_ftell(s->pb); 42 atom->size = get_be32(s->pb); 43 if (atom->size < 8) 44 return -1; 45 atom->tag = get_le32(s->pb); 46 dprintf(s, "atom %d %.4s offset %#llx\n", 47 atom->size, (char*)&atom->tag, atom->offset); 48 return atom->size; 49} 50 51static int r3d_read_red1(AVFormatContext *s) 52{ 53 AVStream *st = av_new_stream(s, 0); 54 char filename[258]; 55 int tmp, tmp2; 56 57 if (!st) 58 return AVERROR(ENOMEM); 59 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 60 st->codec->codec_id = CODEC_ID_JPEG2000; 61 62 tmp = get_byte(s->pb); // major version 63 tmp2 = get_byte(s->pb); // minor version 64 dprintf(s, "version %d.%d\n", tmp, tmp2); 65 66 tmp = get_be16(s->pb); // unknown 67 dprintf(s, "unknown1 %d\n", tmp); 68 69 tmp = get_be32(s->pb); 70 av_set_pts_info(st, 32, 1, tmp); 71 72 tmp = get_be32(s->pb); // filenum 73 dprintf(s, "filenum %d\n", tmp); 74 75 url_fskip(s->pb, 32); // unknown 76 77 st->codec->width = get_be32(s->pb); 78 st->codec->height = get_be32(s->pb); 79 80 tmp = get_be16(s->pb); // unknown 81 dprintf(s, "unknown2 %d\n", tmp); 82 83 st->codec->time_base.den = get_be16(s->pb); 84 st->codec->time_base.num = get_be16(s->pb); 85 86 tmp = get_byte(s->pb); // audio channels 87 dprintf(s, "audio channels %d\n", tmp); 88 if (tmp > 0) { 89 AVStream *ast = av_new_stream(s, 1); 90 if (!ast) 91 return AVERROR(ENOMEM); 92 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; 93 ast->codec->codec_id = CODEC_ID_PCM_S32BE; 94 ast->codec->channels = tmp; 95 av_set_pts_info(ast, 32, 1, st->time_base.den); 96 } 97 98 get_buffer(s->pb, filename, 257); 99 filename[sizeof(filename)-1] = 0; 100 av_metadata_set2(&st->metadata, "filename", filename, 0); 101 102 dprintf(s, "filename %s\n", filename); 103 dprintf(s, "resolution %dx%d\n", st->codec->width, st->codec->height); 104 dprintf(s, "timescale %d\n", st->time_base.den); 105 dprintf(s, "frame rate %d/%d\n", 106 st->codec->time_base.num, st->codec->time_base.den); 107 108 return 0; 109} 110 111static int r3d_read_rdvo(AVFormatContext *s, Atom *atom) 112{ 113 R3DContext *r3d = s->priv_data; 114 AVStream *st = s->streams[0]; 115 int i; 116 117 r3d->video_offsets_count = (atom->size - 8) / 4; 118 r3d->video_offsets = av_malloc(atom->size); 119 if (!r3d->video_offsets) 120 return AVERROR(ENOMEM); 121 122 for (i = 0; i < r3d->video_offsets_count; i++) { 123 r3d->video_offsets[i] = get_be32(s->pb); 124 if (!r3d->video_offsets[i]) { 125 r3d->video_offsets_count = i; 126 break; 127 } 128 dprintf(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]); 129 } 130 131 if (st->codec->time_base.den) 132 st->duration = (uint64_t)r3d->video_offsets_count* 133 st->time_base.den*st->codec->time_base.num/st->codec->time_base.den; 134 dprintf(s, "duration %lld\n", st->duration); 135 136 return 0; 137} 138 139static void r3d_read_reos(AVFormatContext *s) 140{ 141 R3DContext *r3d = s->priv_data; 142 int tmp; 143 144 r3d->rdvo_offset = get_be32(s->pb); 145 get_be32(s->pb); // rdvs offset 146 get_be32(s->pb); // rdao offset 147 get_be32(s->pb); // rdas offset 148 149 tmp = get_be32(s->pb); 150 dprintf(s, "num video chunks %d\n", tmp); 151 152 tmp = get_be32(s->pb); 153 dprintf(s, "num audio chunks %d\n", tmp); 154 155 url_fskip(s->pb, 6*4); 156} 157 158static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap) 159{ 160 R3DContext *r3d = s->priv_data; 161 Atom atom; 162 int ret; 163 164 if (read_atom(s, &atom) < 0) { 165 av_log(s, AV_LOG_ERROR, "error reading atom\n"); 166 return -1; 167 } 168 if (atom.tag == MKTAG('R','E','D','1')) { 169 if ((ret = r3d_read_red1(s)) < 0) { 170 av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n"); 171 return ret; 172 } 173 } else { 174 av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n"); 175 return -1; 176 } 177 178 s->data_offset = url_ftell(s->pb); 179 dprintf(s, "data offset %#llx\n", s->data_offset); 180 if (url_is_streamed(s->pb)) 181 return 0; 182 // find REOB/REOF/REOS to load index 183 url_fseek(s->pb, url_fsize(s->pb)-48-8, SEEK_SET); 184 if (read_atom(s, &atom) < 0) 185 av_log(s, AV_LOG_ERROR, "error reading end atom\n"); 186 187 if (atom.tag != MKTAG('R','E','O','B') && 188 atom.tag != MKTAG('R','E','O','F') && 189 atom.tag != MKTAG('R','E','O','S')) 190 goto out; 191 192 r3d_read_reos(s); 193 194 if (r3d->rdvo_offset) { 195 url_fseek(s->pb, r3d->rdvo_offset, SEEK_SET); 196 if (read_atom(s, &atom) < 0) 197 av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n"); 198 if (atom.tag == MKTAG('R','D','V','O')) { 199 if (r3d_read_rdvo(s, &atom) < 0) 200 av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n"); 201 } 202 } 203 204 out: 205 url_fseek(s->pb, s->data_offset, SEEK_SET); 206 return 0; 207} 208 209static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom) 210{ 211 AVStream *st = s->streams[0]; 212 int tmp, tmp2; 213 uint64_t pos = url_ftell(s->pb); 214 unsigned dts; 215 int ret; 216 217 dts = get_be32(s->pb); 218 219 tmp = get_be32(s->pb); 220 dprintf(s, "frame num %d\n", tmp); 221 222 tmp = get_byte(s->pb); // major version 223 tmp2 = get_byte(s->pb); // minor version 224 dprintf(s, "version %d.%d\n", tmp, tmp2); 225 226 tmp = get_be16(s->pb); // unknown 227 dprintf(s, "unknown %d\n", tmp); 228 229 if (tmp > 4) { 230 tmp = get_be16(s->pb); // unknown 231 dprintf(s, "unknown %d\n", tmp); 232 233 tmp = get_be16(s->pb); // unknown 234 dprintf(s, "unknown %d\n", tmp); 235 236 tmp = get_be32(s->pb); 237 dprintf(s, "width %d\n", tmp); 238 tmp = get_be32(s->pb); 239 dprintf(s, "height %d\n", tmp); 240 241 tmp = get_be32(s->pb); 242 dprintf(s, "metadata len %d\n", tmp); 243 } 244 tmp = atom->size - 8 - (url_ftell(s->pb) - pos); 245 if (tmp < 0) 246 return -1; 247 ret = av_get_packet(s->pb, pkt, tmp); 248 if (ret < 0) { 249 av_log(s, AV_LOG_ERROR, "error reading video packet\n"); 250 return -1; 251 } 252 253 pkt->stream_index = 0; 254 pkt->dts = dts; 255 if (st->codec->time_base.den) 256 pkt->duration = (uint64_t)st->time_base.den* 257 st->codec->time_base.num/st->codec->time_base.den; 258 dprintf(s, "pkt dts %lld duration %d\n", pkt->dts, pkt->duration); 259 260 return 0; 261} 262 263static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom) 264{ 265 AVStream *st = s->streams[1]; 266 int tmp, tmp2, samples, size; 267 uint64_t pos = url_ftell(s->pb); 268 unsigned dts; 269 int ret; 270 271 dts = get_be32(s->pb); 272 273 st->codec->sample_rate = get_be32(s->pb); 274 275 samples = get_be32(s->pb); 276 277 tmp = get_be32(s->pb); 278 dprintf(s, "packet num %d\n", tmp); 279 280 tmp = get_be16(s->pb); // unkown 281 dprintf(s, "unknown %d\n", tmp); 282 283 tmp = get_byte(s->pb); // major version 284 tmp2 = get_byte(s->pb); // minor version 285 dprintf(s, "version %d.%d\n", tmp, tmp2); 286 287 tmp = get_be32(s->pb); // unknown 288 dprintf(s, "unknown %d\n", tmp); 289 290 size = atom->size - 8 - (url_ftell(s->pb) - pos); 291 if (size < 0) 292 return -1; 293 ret = av_get_packet(s->pb, pkt, size); 294 if (ret < 0) { 295 av_log(s, AV_LOG_ERROR, "error reading audio packet\n"); 296 return ret; 297 } 298 299 pkt->stream_index = 1; 300 pkt->dts = dts; 301 pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate); 302 dprintf(s, "pkt dts %lld duration %d samples %d sample rate %d\n", 303 pkt->dts, pkt->duration, samples, st->codec->sample_rate); 304 305 return 0; 306} 307 308static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt) 309{ 310 Atom atom; 311 int err = 0; 312 313 while (!err) { 314 if (read_atom(s, &atom) < 0) { 315 err = -1; 316 break; 317 } 318 switch (atom.tag) { 319 case MKTAG('R','E','D','V'): 320 if (s->streams[0]->discard == AVDISCARD_ALL) 321 goto skip; 322 if (!(err = r3d_read_redv(s, pkt, &atom))) 323 return 0; 324 break; 325 case MKTAG('R','E','D','A'): 326 if (s->nb_streams < 2) 327 return -1; 328 if (s->streams[1]->discard == AVDISCARD_ALL) 329 goto skip; 330 if (!(err = r3d_read_reda(s, pkt, &atom))) 331 return 0; 332 break; 333 default: 334 skip: 335 url_fskip(s->pb, atom.size-8); 336 } 337 } 338 return err; 339} 340 341static int r3d_probe(AVProbeData *p) 342{ 343 if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1')) 344 return AVPROBE_SCORE_MAX; 345 return 0; 346} 347 348static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) 349{ 350 AVStream *st = s->streams[0]; // video stream 351 R3DContext *r3d = s->priv_data; 352 int frame_num; 353 354 if (!st->codec->time_base.num || !st->time_base.den) 355 return -1; 356 357 frame_num = sample_time*st->codec->time_base.den/ 358 ((int64_t)st->codec->time_base.num*st->time_base.den); 359 dprintf(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time); 360 361 if (frame_num < r3d->video_offsets_count) { 362 url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET); 363 } else { 364 av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num); 365 return -1; 366 } 367 368 return 0; 369} 370 371static int r3d_close(AVFormatContext *s) 372{ 373 R3DContext *r3d = s->priv_data; 374 375 av_freep(&r3d->video_offsets); 376 377 return 0; 378} 379 380AVInputFormat r3d_demuxer = { 381 "r3d", 382 NULL_IF_CONFIG_SMALL("REDCODE R3D format"), 383 sizeof(R3DContext), 384 r3d_probe, 385 r3d_read_header, 386 r3d_read_packet, 387 r3d_close, 388 r3d_seek, 389}; 390