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 "demux.h"
  27 #include "internal.h"
  28
  29 typedef struct R3DContext {
  30     unsigned video_offsets_count;
  31     unsigned rdvo_offset;
  32
  33     int audio_channels;
  34 } R3DContext;
  35
  36 typedef struct Atom {
  37     unsigned size;
  38     uint32_t tag;
  39     uint64_t offset;
  40 } Atom;
  41
  42 static int read_atom(AVFormatContext *s, Atom *atom)
  43 {
  44     atom->offset = avio_tell(s->pb);
  45     atom->size = avio_rb32(s->pb);
  46     if (atom->size < 8)
  47         return -1;
  48     atom->tag = avio_rl32(s->pb);
  49     av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
  50             atom->size, (char*)&atom->tag, atom->offset);
  51     return atom->size;
  52 }
  53
  54 static int r3d_read_red1(AVFormatContext *s)
  55 {
  56     AVStream *st = avformat_new_stream(s, NULL);
  57     R3DContext *r3d = s->priv_data;
  58     char filename[258];
  59     int tmp;
  60     int ret;
  61     int av_unused tmp2;
  62     AVRational framerate;
  63
  64     if (!st)
  65         return AVERROR(ENOMEM);
  66     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
  67     st->codecpar->codec_id = AV_CODEC_ID_JPEG2000;
  68
  69     tmp  = avio_r8(s->pb); // major version
  70     tmp2 = avio_r8(s->pb); // minor version
  71     av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
  72
  73     tmp = avio_rb16(s->pb); // unknown
  74     av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
  75
  76     tmp = avio_rb32(s->pb);
  77     avpriv_set_pts_info(st, 32, 1, tmp);
  78
  79     tmp = avio_rb32(s->pb); // filenum
  80     av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
  81
  82     avio_skip(s->pb, 32); // unknown
  83
  84     st->codecpar->width  = avio_rb32(s->pb);
  85     st->codecpar->height = avio_rb32(s->pb);
  86
  87     tmp = avio_rb16(s->pb); // unknown
  88     av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
  89
  90     framerate.num = avio_rb16(s->pb);
  91     framerate.den = avio_rb16(s->pb);
  92     if (framerate.num > 0 && framerate.den > 0) {
  93 #if FF_API_R_FRAME_RATE
  94         st->r_frame_rate =
  95 #endif
  96         st->avg_frame_rate = framerate;
  97     }
  98
  99     r3d->audio_channels = avio_r8(s->pb); // audio channels
 100     av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
 101
 102     ret = avio_read(s->pb, filename, 257);
 103     if (ret < 257)
 104         return ret < 0 ? ret : AVERROR_EOF;
 105     filename[sizeof(filename)-1] = 0;
 106     av_dict_set(&st->metadata, "filename", filename, 0);
 107
 108     av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
 109     av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
 110     av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
 111     av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
 112             framerate.num, framerate.den);
 113
 114     return 0;
 115 }
 116
 117 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
 118 {
 119     R3DContext *r3d = s->priv_data;
 120     AVStream *st = s->streams[0];
 121     int i;
 122
 123     r3d->video_offsets_count = (atom->size - 8) / 4;
 124
 125     for (i = 0; i < r3d->video_offsets_count; i++) {
 126         unsigned video_offset = avio_rb32(s->pb);
 127         if (!video_offset) {
 128             r3d->video_offsets_count = i;
 129             break;
 130         }
 131         av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, video_offset);
 132     }
 133
 134     if (st->avg_frame_rate.num)
 135         st->duration = av_rescale_q(r3d->video_offsets_count,
 136                                     av_inv_q(st->avg_frame_rate),
 137                                     st->time_base);
 138     av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
 139
 140     return 0;
 141 }
 142
 143 static void r3d_read_reos(AVFormatContext *s)
 144 {
 145     R3DContext *r3d = s->priv_data;
 146     int av_unused tmp;
 147
 148     r3d->rdvo_offset = avio_rb32(s->pb);
 149     avio_rb32(s->pb); // rdvs offset
 150     avio_rb32(s->pb); // rdao offset
 151     avio_rb32(s->pb); // rdas offset
 152
 153     tmp = avio_rb32(s->pb);
 154     av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
 155
 156     tmp = avio_rb32(s->pb);
 157     av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
 158
 159     avio_skip(s->pb, 6*4);
 160 }
 161
 162 static int r3d_read_header(AVFormatContext *s)
 163 {
 164     FFFormatContext *const si = ffformatcontext(s);
 165     R3DContext *r3d = s->priv_data;
 166     Atom atom;
 167     int ret;
 168
 169     if (read_atom(s, &atom) < 0) {
 170         av_log(s, AV_LOG_ERROR, "error reading atom\n");
 171         return -1;
 172     }
 173     if (atom.tag == MKTAG('R','E','D','1')) {
 174         if ((ret = r3d_read_red1(s)) < 0) {
 175             av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
 176             return ret;
 177         }
 178     } else {
 179         av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
 180         return -1;
 181     }
 182
 183     /* we cannot create the audio stream now because we do not know the
 184      * sample rate */
 185     if (r3d->audio_channels)
 186         s->ctx_flags |= AVFMTCTX_NOHEADER;
 187
 188     si->data_offset = avio_tell(s->pb);
 189     av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", si->data_offset);
 190     if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
 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, si->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     int64_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_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
 232
 233     tmp  = avio_r8(s->pb); // major version
 234     tmp2 = avio_r8(s->pb); // minor version
 235     av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
 236
 237     tmp = avio_rb16(s->pb); // unknown
 238     av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 239
 240     if (tmp > 4) {
 241         tmp = avio_rb16(s->pb); // unknown
 242         av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 243
 244         tmp = avio_rb16(s->pb); // unknown
 245         av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 246
 247         tmp = avio_rb32(s->pb);
 248         av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
 249         tmp = avio_rb32(s->pb);
 250         av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
 251
 252         tmp = avio_rb32(s->pb);
 253         av_log(s, AV_LOG_TRACE, "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_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\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     R3DContext *r3d = s->priv_data;
 277     AVStream *st;
 278     int av_unused tmp, tmp2;
 279     int samples, size;
 280     int64_t pos = avio_tell(s->pb);
 281     unsigned dts;
 282     int ret;
 283
 284     if (s->nb_streams < 2) {
 285         st = avformat_new_stream(s, NULL);
 286         if (!st)
 287             return AVERROR(ENOMEM);
 288         st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
 289         st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
 290         st->codecpar->ch_layout.nb_channels = r3d->audio_channels;
 291         avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
 292     } else {
 293         st = s->streams[1];
 294     }
 295
 296     dts = avio_rb32(s->pb);
 297
 298     st->codecpar->sample_rate = avio_rb32(s->pb);
 299     if (st->codecpar->sample_rate <= 0) {
 300         av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
 301         return AVERROR_INVALIDDATA;
 302     }
 303
 304     samples = avio_rb32(s->pb);
 305
 306     tmp = avio_rb32(s->pb);
 307     av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
 308
 309     tmp = avio_rb16(s->pb); // unknown
 310     av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 311
 312     tmp  = avio_r8(s->pb); // major version
 313     tmp2 = avio_r8(s->pb); // minor version
 314     av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
 315
 316     tmp = avio_rb32(s->pb); // unknown
 317     av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
 318
 319     size = atom->size - 8 - (avio_tell(s->pb) - pos);
 320     if (size < 0)
 321         return -1;
 322     ret = av_get_packet(s->pb, pkt, size);
 323     if (ret < 0) {
 324         av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
 325         return ret;
 326     }
 327
 328     pkt->stream_index = 1;
 329     pkt->dts = dts;
 330
 331     if (st->codecpar->sample_rate && samples > 0)
 332         pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
 333     av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
 334             pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
 335
 336     return 0;
 337 }
 338
 339 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
 340 {
 341     R3DContext *r3d = s->priv_data;
 342     Atom atom;
 343     int err = 0;
 344
 345     while (!err) {
 346         if (read_atom(s, &atom) < 0) {
 347             err = -1;
 348             break;
 349         }
 350         switch (atom.tag) {
 351         case MKTAG('R','E','D','V'):
 352             if (s->streams[0]->discard == AVDISCARD_ALL)
 353                 goto skip;
 354             if (!(err = r3d_read_redv(s, pkt, &atom)))
 355                 return 0;
 356             break;
 357         case MKTAG('R','E','D','A'):
 358             if (!r3d->audio_channels)
 359                 return -1;
 360             if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
 361                 goto skip;
 362             if (!(err = r3d_read_reda(s, pkt, &atom)))
 363                 return 0;
 364             break;
 365         default:
 366         skip:
 367             avio_skip(s->pb, atom.size-8);
 368         }
 369     }
 370     return err;
 371 }
 372
 373 static int r3d_probe(const AVProbeData *p)
 374 {
 375     if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
 376         return AVPROBE_SCORE_MAX;
 377     return 0;
 378 }
 379
 380 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
 381 {
 382     AVStream *st = s->streams[0]; // video stream
 383     R3DContext *r3d = s->priv_data;
 384     int frame_num;
 385
 386     if (!st->avg_frame_rate.num)
 387         return -1;
 388
 389     frame_num = av_rescale_q(sample_time, st->time_base,
 390                              av_inv_q(st->avg_frame_rate));
 391     av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
 392             frame_num, sample_time);
 393
 394     if (frame_num < r3d->video_offsets_count) {
 395         if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
 396             return -1;
 397     } else {
 398         av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
 399         return -1;
 400     }
 401
 402     return 0;
 403 }
 404
 405 const FFInputFormat ff_r3d_demuxer = {
 406     .p.name         = "r3d",
 407     .p.long_name    = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
 408     .priv_data_size = sizeof(R3DContext),
 409     .read_probe     = r3d_probe,
 410     .read_header    = r3d_read_header,
 411     .read_packet    = r3d_read_packet,
 412     .read_seek      = r3d_seek,
 413 };