libavformat/r3d.c

   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 R3DContext {
  29     unsigned video_offsets_count;
  30     unsigned rdvo_offset;
  31
  32     int audio_channels;
  33 } R3DContext;
  34
  35 typedef struct Atom {
  36     unsigned size;
  37     uint32_t tag;
  38     uint64_t offset;
  39 } Atom;
  40
  41 static int read_atom(AVFormatContext *s, Atom *atom)
  42 {
  43     atom->offset = avio_tell(s->pb);
  44     atom->size = avio_rb32(s->pb);
  45     if (atom->size < 8)
  46         return -1;
  47     atom->tag = avio_rl32(s->pb);
  48     av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
  49             atom->size, (char*)&atom->tag, atom->offset);
  50     return atom->size;
  51 }
  52
  53 static int r3d_read_red1(AVFormatContext *s)
  54 {
  55     AVStream *st = avformat_new_stream(s, NULL);
  56     R3DContext *r3d = s->priv_data;
  57     char filename[258];
  58     int tmp;
  59     int av_unused tmp2;
  60     AVRational framerate;
  61
  62     if (!st)
  63         return AVERROR(ENOMEM);
  64     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
  65     st->codecpar->codec_id = AV_CODEC_ID_JPEG2000;
  66
  67     tmp  = avio_r8(s->pb); // major version
  68     tmp2 = avio_r8(s->pb); // minor version
  69     av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
  70
  71     tmp = avio_rb16(s->pb); // unknown
  72     av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
  73
  74     tmp = avio_rb32(s->pb);
  75     avpriv_set_pts_info(st, 32, 1, tmp);
  76
  77     tmp = avio_rb32(s->pb); // filenum
  78     av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
  79
  80     avio_skip(s->pb, 32); // unknown
  81
  82     st->codecpar->width  = avio_rb32(s->pb);
  83     st->codecpar->height = avio_rb32(s->pb);
  84
  85     tmp = avio_rb16(s->pb); // unknown
  86     av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
  87
  88     framerate.num = avio_rb16(s->pb);
  89     framerate.den = avio_rb16(s->pb);
  90     if (framerate.num > 0 && framerate.den > 0) {
  91 #if FF_API_R_FRAME_RATE
  92         st->r_frame_rate =
  93 #endif
  94         st->avg_frame_rate = framerate;
  95     }
  96
  97     r3d->audio_channels = avio_r8(s->pb); // audio channels
  98     av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
  99
 100     avio_read(s->pb, filename, 257);
 101     filename[sizeof(filename)-1] = 0;
 102     av_dict_set(&st->metadata, "filename", filename, 0);
 103
 104     av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
 105     av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
 106     av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
 107     av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
 108             framerate.num, framerate.den);
 109
 110     return 0;
 111 }
 112
 113 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
 114 {
 115     R3DContext *r3d = s->priv_data;
 116     AVStream *st = s->streams[0];
 117     int i;
 118
 119     r3d->video_offsets_count = (atom->size - 8) / 4;
 120
 121     for (i = 0; i < r3d->video_offsets_count; i++) {
 122         unsigned video_offset = avio_rb32(s->pb);
 123         if (!video_offset) {
 124             r3d->video_offsets_count = i;
 125             break;
 126         }
 127         av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, video_offset);
 128     }
 129
 130     if (st->avg_frame_rate.num)
 131         st->duration = av_rescale_q(r3d->video_offsets_count,
 132                                     av_inv_q(st->avg_frame_rate),
 133                                     st->time_base);
 134     av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
 135
 136     return 0;
 137 }
 138
 139 static void r3d_read_reos(AVFormatContext *s)
 140 {
 141     R3DContext *r3d = s->priv_data;
 142     int av_unused tmp;
 143
 144     r3d->rdvo_offset = avio_rb32(s->pb);
 145     avio_rb32(s->pb); // rdvs offset
 146     avio_rb32(s->pb); // rdao offset
 147     avio_rb32(s->pb); // rdas offset
 148
 149     tmp = avio_rb32(s->pb);
 150     av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
 151
 152     tmp = avio_rb32(s->pb);
 153     av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
 154
 155     avio_skip(s->pb, 6*4);
 156 }
 157
 158 static int r3d_read_header(AVFormatContext *s)
 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     /* we cannot create the audio stream now because we do not know the
 179      * sample rate */
 180     if (r3d->audio_channels)
 181         s->ctx_flags |= AVFMTCTX_NOHEADER;
 182
 183     s->internal->data_offset = avio_tell(s->pb);
 184     av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
 185     if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
 186         return 0;
 187     // find REOB/REOF/REOS to load index
 188     avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
 189     if (read_atom(s, &atom) < 0)
 190         av_log(s, AV_LOG_ERROR, "error reading end atom\n");
 191
 192     if (atom.tag != MKTAG('R','E','O','B') &&
 193         atom.tag != MKTAG('R','E','O','F') &&
 194         atom.tag != MKTAG('R','E','O','S'))
 195         goto out;
 196
 197     r3d_read_reos(s);
 198
 199     if (r3d->rdvo_offset) {
 200         avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
 201         if (read_atom(s, &atom) < 0)
 202             av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
 203         if (atom.tag == MKTAG('R','D','V','O')) {
 204             if (r3d_read_rdvo(s, &atom) < 0)
 205                 av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
 206         }
 207     }
 208
 209  out:
 210     avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
 211     return 0;
 212 }
 213
 214 static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
 215 {
 216     AVStream *st = s->streams[0];
 217     int tmp;
 218     int av_unused tmp2;
 219     int64_t pos = avio_tell(s->pb);
 220     unsigned dts;
 221     int ret;
 222
 223     dts = avio_rb32(s->pb);
 224
 225     tmp = avio_rb32(s->pb);
 226     av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
 227
 228     tmp  = avio_r8(s->pb); // major version
 229     tmp2 = avio_r8(s->pb); // minor version
 230     av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
 231
 232     tmp = avio_rb16(s->pb); // unknown
 233     av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 234
 235     if (tmp > 4) {
 236         tmp = avio_rb16(s->pb); // unknown
 237         av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 238
 239         tmp = avio_rb16(s->pb); // unknown
 240         av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 241
 242         tmp = avio_rb32(s->pb);
 243         av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
 244         tmp = avio_rb32(s->pb);
 245         av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
 246
 247         tmp = avio_rb32(s->pb);
 248         av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
 249     }
 250     tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
 251     if (tmp < 0)
 252         return -1;
 253     ret = av_get_packet(s->pb, pkt, tmp);
 254     if (ret < 0) {
 255         av_log(s, AV_LOG_ERROR, "error reading video packet\n");
 256         return -1;
 257     }
 258
 259     pkt->stream_index = 0;
 260     pkt->dts = dts;
 261     if (st->avg_frame_rate.num)
 262         pkt->duration = (uint64_t)st->time_base.den*
 263             st->avg_frame_rate.den/st->avg_frame_rate.num;
 264     av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
 265
 266     return 0;
 267 }
 268
 269 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
 270 {
 271     R3DContext *r3d = s->priv_data;
 272     AVStream *st;
 273     int av_unused tmp, tmp2;
 274     int samples, size;
 275     int64_t pos = avio_tell(s->pb);
 276     unsigned dts;
 277     int ret;
 278
 279     if (s->nb_streams < 2) {
 280         st = avformat_new_stream(s, NULL);
 281         if (!st)
 282             return AVERROR(ENOMEM);
 283         st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
 284         st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
 285         st->codecpar->channels = r3d->audio_channels;
 286         avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
 287     } else {
 288         st = s->streams[1];
 289     }
 290
 291     dts = avio_rb32(s->pb);
 292
 293     st->codecpar->sample_rate = avio_rb32(s->pb);
 294     if (st->codecpar->sample_rate <= 0) {
 295         av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
 296         return AVERROR_INVALIDDATA;
 297     }
 298
 299     samples = avio_rb32(s->pb);
 300
 301     tmp = avio_rb32(s->pb);
 302     av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
 303
 304     tmp = avio_rb16(s->pb); // unknown
 305     av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 306
 307     tmp  = avio_r8(s->pb); // major version
 308     tmp2 = avio_r8(s->pb); // minor version
 309     av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
 310
 311     tmp = avio_rb32(s->pb); // unknown
 312     av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 313
 314     size = atom->size - 8 - (avio_tell(s->pb) - pos);
 315     if (size < 0)
 316         return -1;
 317     ret = av_get_packet(s->pb, pkt, size);
 318     if (ret < 0) {
 319         av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
 320         return ret;
 321     }
 322
 323     pkt->stream_index = 1;
 324     pkt->dts = dts;
 325
 326     if (st->codecpar->sample_rate && samples > 0)
 327         pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
 328     av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
 329             pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
 330
 331     return 0;
 332 }
 333
 334 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
 335 {
 336     R3DContext *r3d = s->priv_data;
 337     Atom atom;
 338     int err = 0;
 339
 340     while (!err) {
 341         if (read_atom(s, &atom) < 0) {
 342             err = -1;
 343             break;
 344         }
 345         switch (atom.tag) {
 346         case MKTAG('R','E','D','V'):
 347             if (s->streams[0]->discard == AVDISCARD_ALL)
 348                 goto skip;
 349             if (!(err = r3d_read_redv(s, pkt, &atom)))
 350                 return 0;
 351             break;
 352         case MKTAG('R','E','D','A'):
 353             if (!r3d->audio_channels)
 354                 return -1;
 355             if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
 356                 goto skip;
 357             if (!(err = r3d_read_reda(s, pkt, &atom)))
 358                 return 0;
 359             break;
 360         default:
 361         skip:
 362             avio_skip(s->pb, atom.size-8);
 363         }
 364     }
 365     return err;
 366 }
 367
 368 static int r3d_probe(const AVProbeData *p)
 369 {
 370     if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
 371         return AVPROBE_SCORE_MAX;
 372     return 0;
 373 }
 374
 375 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
 376 {
 377     AVStream *st = s->streams[0]; // video stream
 378     R3DContext *r3d = s->priv_data;
 379     int frame_num;
 380
 381     if (!st->avg_frame_rate.num)
 382         return -1;
 383
 384     frame_num = av_rescale_q(sample_time, st->time_base,
 385                              av_inv_q(st->avg_frame_rate));
 386     av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
 387             frame_num, sample_time);
 388
 389     if (frame_num < r3d->video_offsets_count) {
 390         if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
 391             return -1;
 392     } else {
 393         av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
 394         return -1;
 395     }
 396
 397     return 0;
 398 }
 399
 400 AVInputFormat ff_r3d_demuxer = {
 401     .name           = "r3d",
 402     .long_name      = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
 403     .priv_data_size = sizeof(R3DContext),
 404     .read_probe     = r3d_probe,
 405     .read_header    = r3d_read_header,
 406     .read_packet    = r3d_read_packet,
 407     .read_seek      = r3d_seek,
 408 };