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