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 AVERROR(ENOMEM);
  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         if (!ast)
  91             return AVERROR(ENOMEM);
  92         ast->codec->codec_type = CODEC_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_set(&st->metadata, "filename", filename);
 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
 111 static 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
 139 static 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
 158 static 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
 209 static 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
 216     dts = get_be32(s->pb);
 217
 218     tmp = get_be32(s->pb);
 219     dprintf(s, "frame num %d\n", tmp);
 220
 221     tmp  = get_byte(s->pb); // major version
 222     tmp2 = get_byte(s->pb); // minor version
 223     dprintf(s, "version %d.%d\n", tmp, tmp2);
 224
 225     tmp = get_be16(s->pb); // unknown
 226     dprintf(s, "unknown %d\n", tmp);
 227
 228     if (tmp > 4) {
 229         tmp = get_be16(s->pb); // unknown
 230         dprintf(s, "unknown %d\n", tmp);
 231
 232         tmp = get_be16(s->pb); // unknown
 233         dprintf(s, "unknown %d\n", tmp);
 234
 235         tmp = get_be32(s->pb);
 236         dprintf(s, "width %d\n", tmp);
 237         tmp = get_be32(s->pb);
 238         dprintf(s, "height %d\n", tmp);
 239
 240         tmp = get_be32(s->pb);
 241         dprintf(s, "metadata len %d\n", tmp);
 242     }
 243     tmp = atom->size - 8 - (url_ftell(s->pb) - pos);
 244     if (tmp < 0)
 245         return -1;
 246
 247     if (av_get_packet(s->pb, pkt, tmp) != tmp) {
 248         av_log(s, AV_LOG_ERROR, "error reading video packet\n");
 249         return -1;
 250     }
 251
 252     pkt->stream_index = 0;
 253     pkt->dts = dts;
 254     if (st->codec->time_base.den)
 255         pkt->duration = (uint64_t)st->time_base.den*
 256             st->codec->time_base.num/st->codec->time_base.den;
 257     dprintf(s, "pkt dts %lld duration %d\n", pkt->dts, pkt->duration);
 258
 259     return 0;
 260 }
 261
 262 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
 263 {
 264     AVStream *st = s->streams[1];
 265     int tmp, tmp2, samples, size;
 266     uint64_t pos = url_ftell(s->pb);
 267     unsigned dts;
 268
 269     dts = get_be32(s->pb);
 270
 271     st->codec->sample_rate = get_be32(s->pb);
 272
 273     samples = get_be32(s->pb);
 274
 275     tmp = get_be32(s->pb);
 276     dprintf(s, "packet num %d\n", tmp);
 277
 278     tmp = get_be16(s->pb); // unkown
 279     dprintf(s, "unknown %d\n", tmp);
 280
 281     tmp  = get_byte(s->pb); // major version
 282     tmp2 = get_byte(s->pb); // minor version
 283     dprintf(s, "version %d.%d\n", tmp, tmp2);
 284
 285     tmp = get_be32(s->pb); // unknown
 286     dprintf(s, "unknown %d\n", tmp);
 287
 288     size = atom->size - 8 - (url_ftell(s->pb) - pos);
 289     if (size < 0)
 290         return -1;
 291     if (av_get_packet(s->pb, pkt, size) != size) {
 292         av_log(s, AV_LOG_ERROR, "error reading video packet\n");
 293         return -1;
 294     }
 295
 296     pkt->stream_index = 1;
 297     pkt->dts = dts;
 298     pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
 299     dprintf(s, "pkt dts %lld duration %d samples %d sample rate %d\n",
 300             pkt->dts, pkt->duration, samples, st->codec->sample_rate);
 301
 302     return 0;
 303 }
 304
 305 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
 306 {
 307     Atom atom;
 308     int err = 0;
 309
 310     while (!err) {
 311         if (read_atom(s, &atom) < 0) {
 312             err = -1;
 313             break;
 314         }
 315         switch (atom.tag) {
 316         case MKTAG('R','E','D','V'):
 317             if (s->streams[0]->discard == AVDISCARD_ALL)
 318                 goto skip;
 319             if (!(err = r3d_read_redv(s, pkt, &atom)))
 320                 return 0;
 321             break;
 322         case MKTAG('R','E','D','A'):
 323             if (s->nb_streams < 2)
 324                 return -1;
 325             if (s->streams[1]->discard == AVDISCARD_ALL)
 326                 goto skip;
 327             if (!(err = r3d_read_reda(s, pkt, &atom)))
 328                 return 0;
 329             break;
 330         default:
 331         skip:
 332             url_fskip(s->pb, atom.size-8);
 333         }
 334     }
 335     return err;
 336 }
 337
 338 static int r3d_probe(AVProbeData *p)
 339 {
 340     if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
 341         return AVPROBE_SCORE_MAX;
 342     return 0;
 343 }
 344
 345 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
 346 {
 347     AVStream *st = s->streams[0]; // video stream
 348     R3DContext *r3d = s->priv_data;
 349     int frame_num;
 350
 351     if (!st->codec->time_base.num || !st->time_base.den)
 352         return -1;
 353
 354     frame_num = sample_time*st->codec->time_base.den/
 355         ((int64_t)st->codec->time_base.num*st->time_base.den);
 356     dprintf(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time);
 357
 358     if (frame_num < r3d->video_offsets_count) {
 359         url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET);
 360     } else {
 361         av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
 362         return -1;
 363     }
 364
 365     return 0;
 366 }
 367
 368 static int r3d_close(AVFormatContext *s)
 369 {
 370     R3DContext *r3d = s->priv_data;
 371
 372     av_freep(&r3d->video_offsets);
 373
 374     return 0;
 375 }
 376
 377 AVInputFormat r3d_demuxer = {
 378     "r3d",
 379     NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
 380     sizeof(R3DContext),
 381     r3d_probe,
 382     r3d_read_header,
 383     r3d_read_packet,
 384     r3d_close,
 385     r3d_seek,
 386 };