libavformat/iff.c

   1 /*
   2  * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
   3  * Copyright (c) 2010 Peter Ross <pross@xvid.org>
   4  * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * IFF file demuxer
  26  * by Jaikrishnan Menon
  27  * for more information on the .iff file format, visit:
  28  * http://wiki.multimedia.cx/index.php?title=IFF
  29  */
  30
  31 #include <inttypes.h>
  32
  33 #include "libavutil/avassert.h"
  34 #include "libavutil/channel_layout.h"
  35 #include "libavutil/intreadwrite.h"
  36 #include "libavutil/dict.h"
  37 #include "libavcodec/bytestream.h"
  38 #include "avformat.h"
  39 #include "id3v2.h"
  40 #include "internal.h"
  41
  42 #define ID_8SVX       MKTAG('8','S','V','X')
  43 #define ID_16SV       MKTAG('1','6','S','V')
  44 #define ID_MAUD       MKTAG('M','A','U','D')
  45 #define ID_MHDR       MKTAG('M','H','D','R')
  46 #define ID_MDAT       MKTAG('M','D','A','T')
  47 #define ID_VHDR       MKTAG('V','H','D','R')
  48 #define ID_ATAK       MKTAG('A','T','A','K')
  49 #define ID_RLSE       MKTAG('R','L','S','E')
  50 #define ID_CHAN       MKTAG('C','H','A','N')
  51 #define ID_PBM        MKTAG('P','B','M',' ')
  52 #define ID_ILBM       MKTAG('I','L','B','M')
  53 #define ID_BMHD       MKTAG('B','M','H','D')
  54 #define ID_DGBL       MKTAG('D','G','B','L')
  55 #define ID_CAMG       MKTAG('C','A','M','G')
  56 #define ID_CMAP       MKTAG('C','M','A','P')
  57 #define ID_ACBM       MKTAG('A','C','B','M')
  58 #define ID_DEEP       MKTAG('D','E','E','P')
  59 #define ID_RGB8       MKTAG('R','G','B','8')
  60 #define ID_RGBN       MKTAG('R','G','B','N')
  61 #define ID_DSD        MKTAG('D','S','D',' ')
  62 #define ID_DST        MKTAG('D','S','T',' ')
  63 #define ID_DSTC       MKTAG('D','S','T','C')
  64 #define ID_DSTF       MKTAG('D','S','T','F')
  65 #define ID_FRTE       MKTAG('F','R','T','E')
  66 #define ID_ANIM       MKTAG('A','N','I','M')
  67 #define ID_ANHD       MKTAG('A','N','H','D')
  68 #define ID_DLTA       MKTAG('D','L','T','A')
  69 #define ID_DPAN       MKTAG('D','P','A','N')
  70
  71 #define ID_FORM       MKTAG('F','O','R','M')
  72 #define ID_FRM8       MKTAG('F','R','M','8')
  73 #define ID_ANNO       MKTAG('A','N','N','O')
  74 #define ID_AUTH       MKTAG('A','U','T','H')
  75 #define ID_CHRS       MKTAG('C','H','R','S')
  76 #define ID_COPYRIGHT  MKTAG('(','c',')',' ')
  77 #define ID_CSET       MKTAG('C','S','E','T')
  78 #define ID_FVER       MKTAG('F','V','E','R')
  79 #define ID_NAME       MKTAG('N','A','M','E')
  80 #define ID_TEXT       MKTAG('T','E','X','T')
  81 #define ID_ABIT       MKTAG('A','B','I','T')
  82 #define ID_BODY       MKTAG('B','O','D','Y')
  83 #define ID_DBOD       MKTAG('D','B','O','D')
  84 #define ID_DPEL       MKTAG('D','P','E','L')
  85 #define ID_DLOC       MKTAG('D','L','O','C')
  86 #define ID_TVDC       MKTAG('T','V','D','C')
  87
  88 #define LEFT    2
  89 #define RIGHT   4
  90 #define STEREO  6
  91
  92 /**
  93  * This number of bytes if added at the beginning of each AVPacket
  94  * which contain additional information about video properties
  95  * which has to be shared between demuxer and decoder.
  96  * This number may change between frames, e.g. the demuxer might
  97  * set it to smallest possible size of 2 to indicate that there's
  98  * no extradata changing in this frame.
  99  */
 100 #define IFF_EXTRA_VIDEO_SIZE 41
 101
 102 typedef enum {
 103     COMP_NONE,
 104     COMP_FIB,
 105     COMP_EXP
 106 } svx8_compression_type;
 107
 108 typedef struct IffDemuxContext {
 109     int      is_64bit;  ///< chunk size is 64-bit
 110     int64_t  body_pos;
 111     int64_t  body_end;
 112     uint32_t  body_size;
 113     svx8_compression_type   svx8_compression;
 114     unsigned  maud_bits;
 115     unsigned  maud_compression;
 116     unsigned  bitmap_compression;  ///< delta compression method used
 117     unsigned  bpp;          ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
 118     unsigned  ham;          ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
 119     unsigned  flags;        ///< 1 for EHB, 0 is no extra half darkening
 120     unsigned  transparency; ///< transparency color index in palette
 121     unsigned  masking;      ///< masking method used
 122     uint8_t   tvdc[32];     ///< TVDC lookup table
 123     int64_t   pts;
 124 } IffDemuxContext;
 125
 126 /* Metadata string read */
 127 static int get_metadata(AVFormatContext *s,
 128                         const char *const tag,
 129                         const unsigned data_size)
 130 {
 131     uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
 132
 133     if (!buf)
 134         return AVERROR(ENOMEM);
 135
 136     if (avio_read(s->pb, buf, data_size) != data_size) {
 137         av_free(buf);
 138         return AVERROR(EIO);
 139     }
 140     buf[data_size] = 0;
 141     av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
 142     return 0;
 143 }
 144
 145 static int iff_probe(AVProbeData *p)
 146 {
 147     const uint8_t *d = p->buf;
 148
 149     if ( (AV_RL32(d)   == ID_FORM &&
 150          (AV_RL32(d+8) == ID_8SVX ||
 151           AV_RL32(d+8) == ID_16SV ||
 152           AV_RL32(d+8) == ID_MAUD ||
 153           AV_RL32(d+8) == ID_PBM  ||
 154           AV_RL32(d+8) == ID_ACBM ||
 155           AV_RL32(d+8) == ID_DEEP ||
 156           AV_RL32(d+8) == ID_ILBM ||
 157           AV_RL32(d+8) == ID_RGB8 ||
 158           AV_RL32(d+8) == ID_ANIM ||
 159           AV_RL32(d+8) == ID_RGBN)) ||
 160          (AV_RL32(d) == ID_FRM8 && AV_RL32(d+12) == ID_DSD))
 161         return AVPROBE_SCORE_MAX;
 162     return 0;
 163 }
 164
 165 static const AVCodecTag dsd_codec_tags[] = {
 166     { AV_CODEC_ID_DSD_MSBF, ID_DSD },
 167     { AV_CODEC_ID_DST,      ID_DST },
 168     { AV_CODEC_ID_NONE, 0 },
 169 };
 170
 171
 172 #define DSD_SLFT MKTAG('S','L','F','T')
 173 #define DSD_SRGT MKTAG('S','R','G','T')
 174 #define DSD_MLFT MKTAG('M','L','F','T')
 175 #define DSD_MRGT MKTAG('M','R','G','T')
 176 #define DSD_C    MKTAG('C',' ',' ',' ')
 177 #define DSD_LS   MKTAG('L','S',' ',' ')
 178 #define DSD_RS   MKTAG('R','S',' ',' ')
 179 #define DSD_LFE  MKTAG('L','F','E',' ')
 180
 181 static const uint32_t dsd_stereo[]  = { DSD_SLFT, DSD_SRGT };
 182 static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS };
 183 static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS };
 184
 185 typedef struct {
 186     uint64_t layout;
 187     const uint32_t * dsd_layout;
 188 } DSDLayoutDesc;
 189
 190 static const DSDLayoutDesc dsd_channel_layout[] = {
 191     { AV_CH_LAYOUT_STEREO,  dsd_stereo },
 192     { AV_CH_LAYOUT_5POINT0, dsd_5point0 },
 193     { AV_CH_LAYOUT_5POINT1, dsd_5point1 },
 194 };
 195
 196 static const uint64_t dsd_loudspeaker_config[] = {
 197     AV_CH_LAYOUT_STEREO,
 198     0, 0,
 199     AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1,
 200 };
 201
 202 static const char * dsd_source_comment[] = {
 203     "dsd_source_comment",
 204     "analogue_source_comment",
 205     "pcm_source_comment",
 206 };
 207
 208 static const char * dsd_history_comment[] = {
 209     "general_remark",
 210     "operator_name",
 211     "creating_machine",
 212     "timezone",
 213     "file_revision"
 214 };
 215
 216 static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
 217 {
 218     AVIOContext *pb = s->pb;
 219
 220     while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
 221         uint32_t tag      = avio_rl32(pb);
 222         uint64_t size     = avio_rb64(pb);
 223         uint64_t orig_pos = avio_tell(pb);
 224         const char * metadata_tag = NULL;
 225
 226         if (size >= INT64_MAX)
 227             return AVERROR_INVALIDDATA;
 228
 229         switch(tag) {
 230         case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
 231         case MKTAG('D','I','T','I'): metadata_tag = "title";  break;
 232         }
 233
 234         if (metadata_tag && size > 4) {
 235             unsigned int tag_size = avio_rb32(pb);
 236             int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4));
 237             if (ret < 0) {
 238                 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
 239                 return ret;
 240             }
 241         }
 242
 243         avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
 244     }
 245
 246     return 0;
 247 }
 248
 249 static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
 250 {
 251     AVIOContext *pb = s->pb;
 252     char abss[24];
 253     int hour, min, sec, i, ret, config;
 254     int dsd_layout[6];
 255     ID3v2ExtraMeta *id3v2_extra_meta;
 256
 257     while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
 258         uint32_t tag      = avio_rl32(pb);
 259         uint64_t size     = avio_rb64(pb);
 260         uint64_t orig_pos = avio_tell(pb);
 261
 262         if (size >= INT64_MAX)
 263             return AVERROR_INVALIDDATA;
 264
 265         switch(tag) {
 266         case MKTAG('A','B','S','S'):
 267             if (size < 8)
 268                 return AVERROR_INVALIDDATA;
 269             hour = avio_rb16(pb);
 270             min  = avio_r8(pb);
 271             sec  = avio_r8(pb);
 272             snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb));
 273             av_dict_set(&st->metadata, "absolute_start_time", abss, 0);
 274             break;
 275
 276         case MKTAG('C','H','N','L'):
 277             if (size < 2)
 278                 return AVERROR_INVALIDDATA;
 279             st->codecpar->channels       = avio_rb16(pb);
 280             if (size < 2 + st->codecpar->channels * 4)
 281                 return AVERROR_INVALIDDATA;
 282             st->codecpar->channel_layout = 0;
 283             if (st->codecpar->channels > FF_ARRAY_ELEMS(dsd_layout)) {
 284                 avpriv_request_sample(s, "channel layout");
 285                 break;
 286             }
 287             for (i = 0; i < st->codecpar->channels; i++)
 288                 dsd_layout[i] = avio_rl32(pb);
 289             for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) {
 290                 const DSDLayoutDesc * d = &dsd_channel_layout[i];
 291                 if (av_get_channel_layout_nb_channels(d->layout) == st->codecpar->channels &&
 292                     !memcmp(d->dsd_layout, dsd_layout, st->codecpar->channels * sizeof(uint32_t))) {
 293                     st->codecpar->channel_layout = d->layout;
 294                     break;
 295                 }
 296             }
 297             break;
 298
 299         case MKTAG('C','M','P','R'):
 300             if (size < 4)
 301                 return AVERROR_INVALIDDATA;
 302             st->codecpar->codec_tag = tag = avio_rl32(pb);
 303             st->codecpar->codec_id = ff_codec_get_id(dsd_codec_tags, tag);
 304             if (!st->codecpar->codec_id) {
 305                 av_log(s, AV_LOG_ERROR, "'%c%c%c%c' compression is not supported\n",
 306                     tag&0xFF, (tag>>8)&0xFF, (tag>>16)&0xFF, (tag>>24)&0xFF);
 307                 return AVERROR_PATCHWELCOME;
 308             }
 309             break;
 310
 311         case MKTAG('F','S',' ',' '):
 312             if (size < 4)
 313                 return AVERROR_INVALIDDATA;
 314             st->codecpar->sample_rate = avio_rb32(pb) / 8;
 315             break;
 316
 317         case MKTAG('I','D','3',' '):
 318             id3v2_extra_meta = NULL;
 319             ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
 320             if (id3v2_extra_meta) {
 321                 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) {
 322                     ff_id3v2_free_extra_meta(&id3v2_extra_meta);
 323                     return ret;
 324                 }
 325                 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
 326             }
 327
 328             if (size < avio_tell(pb) - orig_pos) {
 329                 av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
 330                 return AVERROR_INVALIDDATA;
 331             }
 332             break;
 333
 334         case MKTAG('L','S','C','O'):
 335             if (size < 2)
 336                 return AVERROR_INVALIDDATA;
 337             config = avio_rb16(pb);
 338             if (config != 0xFFFF) {
 339                 if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config))
 340                     st->codecpar->channel_layout = dsd_loudspeaker_config[config];
 341                 if (!st->codecpar->channel_layout)
 342                     avpriv_request_sample(s, "loudspeaker configuration %d", config);
 343             }
 344             break;
 345         }
 346
 347         avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
 348     }
 349
 350     return 0;
 351 }
 352
 353 static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
 354 {
 355     IffDemuxContext *iff = s->priv_data;
 356     AVIOContext *pb = s->pb;
 357     uint32_t chunk_id;
 358     uint64_t chunk_pos, data_pos, data_size;
 359     int ret = AVERROR_EOF;
 360
 361     while (!avio_feof(pb)) {
 362         chunk_pos = avio_tell(pb);
 363         if (chunk_pos >= iff->body_end)
 364             return AVERROR_EOF;
 365
 366         chunk_id = avio_rl32(pb);
 367         data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
 368         data_pos = avio_tell(pb);
 369
 370         if (data_size < 1 || data_size >= INT64_MAX)
 371             return AVERROR_INVALIDDATA;
 372
 373         switch (chunk_id) {
 374         case ID_DSTF:
 375             if (!pkt) {
 376                 iff->body_pos  = avio_tell(pb) - (iff->is_64bit ? 12 : 8);
 377                 iff->body_size = iff->body_end - iff->body_pos;
 378                 return 0;
 379             }
 380             ret = av_get_packet(pb, pkt, data_size);
 381             if (ret < 0)
 382                 return ret;
 383             if (data_size & 1)
 384                 avio_skip(pb, 1);
 385             pkt->flags |= AV_PKT_FLAG_KEY;
 386             pkt->stream_index = 0;
 387             pkt->duration = s->streams[0]->codecpar->sample_rate / 75;
 388             pkt->pos = chunk_pos;
 389
 390             chunk_pos = avio_tell(pb);
 391             if (chunk_pos >= iff->body_end)
 392                 return 0;
 393
 394             avio_seek(pb, chunk_pos, SEEK_SET);
 395             return 0;
 396
 397         case ID_FRTE:
 398             if (data_size < 4)
 399                 return AVERROR_INVALIDDATA;
 400             s->streams[0]->duration = avio_rb32(pb) * (uint64_t)s->streams[0]->codecpar->sample_rate / 75;
 401
 402             break;
 403         }
 404
 405         avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1));
 406     }
 407
 408     return ret;
 409 }
 410
 411 static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
 412 static const uint8_t deep_rgba[]  = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
 413 static const uint8_t deep_bgra[]  = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
 414 static const uint8_t deep_argb[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
 415 static const uint8_t deep_abgr[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
 416
 417 static int iff_read_header(AVFormatContext *s)
 418 {
 419     IffDemuxContext *iff = s->priv_data;
 420     AVIOContext *pb = s->pb;
 421     AVStream *st;
 422     uint8_t *buf;
 423     uint32_t chunk_id;
 424     uint64_t data_size;
 425     uint32_t screenmode = 0, num, den;
 426     unsigned transparency = 0;
 427     unsigned masking = 0; // no mask
 428     uint8_t fmt[16];
 429     int fmt_size;
 430
 431     st = avformat_new_stream(s, NULL);
 432     if (!st)
 433         return AVERROR(ENOMEM);
 434
 435     st->codecpar->channels = 1;
 436     st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
 437     iff->is_64bit = avio_rl32(pb) == ID_FRM8;
 438     avio_skip(pb, iff->is_64bit ? 8 : 4);
 439     // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
 440     st->codecpar->codec_tag = avio_rl32(pb);
 441     if (st->codecpar->codec_tag == ID_ANIM) {
 442         avio_skip(pb, 12);
 443     }
 444     iff->bitmap_compression = -1;
 445     iff->svx8_compression = -1;
 446     iff->maud_bits = -1;
 447     iff->maud_compression = -1;
 448
 449     while(!avio_feof(pb)) {
 450         uint64_t orig_pos;
 451         int res;
 452         const char *metadata_tag = NULL;
 453         int version, nb_comments, i;
 454         chunk_id = avio_rl32(pb);
 455         data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
 456         orig_pos = avio_tell(pb);
 457
 458         if (data_size >= INT64_MAX)
 459             return AVERROR_INVALIDDATA;
 460
 461         switch(chunk_id) {
 462         case ID_VHDR:
 463             st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
 464
 465             if (data_size < 14)
 466                 return AVERROR_INVALIDDATA;
 467             avio_skip(pb, 12);
 468             st->codecpar->sample_rate = avio_rb16(pb);
 469             if (data_size >= 16) {
 470                 avio_skip(pb, 1);
 471                 iff->svx8_compression = avio_r8(pb);
 472             }
 473             break;
 474
 475         case ID_MHDR:
 476             st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
 477
 478             if (data_size < 32)
 479                 return AVERROR_INVALIDDATA;
 480             avio_skip(pb, 4);
 481             iff->maud_bits = avio_rb16(pb);
 482             avio_skip(pb, 2);
 483             num = avio_rb32(pb);
 484             den = avio_rb16(pb);
 485             if (!den)
 486                 return AVERROR_INVALIDDATA;
 487             avio_skip(pb, 2);
 488             st->codecpar->sample_rate = num / den;
 489             st->codecpar->channels = avio_rb16(pb);
 490             iff->maud_compression = avio_rb16(pb);
 491             if (st->codecpar->channels == 1)
 492                 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
 493             else if (st->codecpar->channels == 2)
 494                 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
 495             break;
 496
 497         case ID_ABIT:
 498         case ID_BODY:
 499         case ID_DBOD:
 500         case ID_DSD:
 501         case ID_DST:
 502         case ID_MDAT:
 503             iff->body_pos = avio_tell(pb);
 504             if (iff->body_pos < 0 || iff->body_pos + data_size > INT64_MAX)
 505                 return AVERROR_INVALIDDATA;
 506
 507             iff->body_end = iff->body_pos + data_size;
 508             iff->body_size = data_size;
 509             if (chunk_id == ID_DST) {
 510                 int ret = read_dst_frame(s, NULL);
 511                 if (ret < 0)
 512                     return ret;
 513             }
 514             break;
 515
 516         case ID_CHAN:
 517             if (data_size < 4)
 518                 return AVERROR_INVALIDDATA;
 519             if (avio_rb32(pb) < 6) {
 520                 st->codecpar->channels       = 1;
 521                 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
 522             } else {
 523                 st->codecpar->channels       = 2;
 524                 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
 525             }
 526             break;
 527
 528         case ID_CAMG:
 529             if (data_size < 4)
 530                 return AVERROR_INVALIDDATA;
 531             screenmode                = avio_rb32(pb);
 532             break;
 533
 534         case ID_CMAP:
 535             if (data_size < 3 || data_size > 768 || data_size % 3) {
 536                  av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
 537                         data_size);
 538                  return AVERROR_INVALIDDATA;
 539             }
 540             st->codecpar->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE;
 541             st->codecpar->extradata      = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
 542             if (!st->codecpar->extradata)
 543                 return AVERROR(ENOMEM);
 544             if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
 545                 return AVERROR(EIO);
 546             break;
 547
 548         case ID_BMHD:
 549             st->codecpar->codec_type            = AVMEDIA_TYPE_VIDEO;
 550             if (data_size <= 8)
 551                 return AVERROR_INVALIDDATA;
 552             st->codecpar->width                 = avio_rb16(pb);
 553             st->codecpar->height                = avio_rb16(pb);
 554             avio_skip(pb, 4); // x, y offset
 555             st->codecpar->bits_per_coded_sample = avio_r8(pb);
 556             if (data_size >= 10)
 557                 masking                      = avio_r8(pb);
 558             if (data_size >= 11)
 559                 iff->bitmap_compression      = avio_r8(pb);
 560             if (data_size >= 14) {
 561                 avio_skip(pb, 1); // padding
 562                 transparency                 = avio_rb16(pb);
 563             }
 564             if (data_size >= 16) {
 565                 st->sample_aspect_ratio.num  = avio_r8(pb);
 566                 st->sample_aspect_ratio.den  = avio_r8(pb);
 567             }
 568             break;
 569
 570         case ID_ANHD:
 571             break;
 572
 573         case ID_DPAN:
 574             avio_skip(pb, 2);
 575             st->duration = avio_rb16(pb);
 576             break;
 577
 578         case ID_DPEL:
 579             if (data_size < 4 || (data_size & 3))
 580                 return AVERROR_INVALIDDATA;
 581             if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
 582                 return fmt_size;
 583             if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
 584                 st->codecpar->format = AV_PIX_FMT_RGB24;
 585             else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
 586                 st->codecpar->format = AV_PIX_FMT_RGBA;
 587             else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
 588                 st->codecpar->format = AV_PIX_FMT_BGRA;
 589             else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
 590                 st->codecpar->format = AV_PIX_FMT_ARGB;
 591             else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
 592                 st->codecpar->format = AV_PIX_FMT_ABGR;
 593             else {
 594                 avpriv_request_sample(s, "color format %.16s", fmt);
 595                 return AVERROR_PATCHWELCOME;
 596             }
 597             break;
 598
 599         case ID_DGBL:
 600             st->codecpar->codec_type         = AVMEDIA_TYPE_VIDEO;
 601             if (data_size < 8)
 602                 return AVERROR_INVALIDDATA;
 603             st->codecpar->width              = avio_rb16(pb);
 604             st->codecpar->height             = avio_rb16(pb);
 605             iff->bitmap_compression          = avio_rb16(pb);
 606             st->sample_aspect_ratio.num      = avio_r8(pb);
 607             st->sample_aspect_ratio.den      = avio_r8(pb);
 608             st->codecpar->bits_per_coded_sample = 24;
 609             break;
 610
 611         case ID_DLOC:
 612             if (data_size < 4)
 613                 return AVERROR_INVALIDDATA;
 614             st->codecpar->width  = avio_rb16(pb);
 615             st->codecpar->height = avio_rb16(pb);
 616             break;
 617
 618         case ID_TVDC:
 619             if (data_size < sizeof(iff->tvdc))
 620                 return AVERROR_INVALIDDATA;
 621             res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
 622             if (res < 0)
 623                 return res;
 624             break;
 625
 626         case ID_ANNO:
 627         case ID_TEXT:      metadata_tag = "comment";   break;
 628         case ID_AUTH:      metadata_tag = "artist";    break;
 629         case ID_COPYRIGHT: metadata_tag = "copyright"; break;
 630         case ID_NAME:      metadata_tag = "title";     break;
 631
 632         /* DSD tags */
 633
 634         case MKTAG('F','V','E','R'):
 635             if (data_size < 4)
 636                 return AVERROR_INVALIDDATA;
 637             version = avio_rb32(pb);
 638             av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
 639             st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
 640             break;
 641
 642         case MKTAG('D','I','I','N'):
 643             res = parse_dsd_diin(s, st, orig_pos + data_size);
 644             if (res < 0)
 645                 return res;
 646             break;
 647
 648         case MKTAG('P','R','O','P'):
 649             if (data_size < 4)
 650                 return AVERROR_INVALIDDATA;
 651             if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
 652                 avpriv_request_sample(s, "unknown property type");
 653                 break;
 654             }
 655             res = parse_dsd_prop(s, st, orig_pos + data_size);
 656             if (res < 0)
 657                 return res;
 658             break;
 659
 660         case MKTAG('C','O','M','T'):
 661             if (data_size < 2)
 662                 return AVERROR_INVALIDDATA;
 663             nb_comments = avio_rb16(pb);
 664             for (i = 0; i < nb_comments; i++) {
 665                 int year, mon, day, hour, min, type, ref;
 666                 char tmp[24];
 667                 const char *tag;
 668                 int metadata_size;
 669
 670                 year = avio_rb16(pb);
 671                 mon  = avio_r8(pb);
 672                 day  = avio_r8(pb);
 673                 hour = avio_r8(pb);
 674                 min  = avio_r8(pb);
 675                 snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
 676                 av_dict_set(&st->metadata, "comment_time", tmp, 0);
 677
 678                 type = avio_rb16(pb);
 679                 ref  = avio_rb16(pb);
 680                 switch (type) {
 681                 case 1:
 682                     if (!i)
 683                         tag = "channel_comment";
 684                     else {
 685                         snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
 686                         tag = tmp;
 687                     }
 688                     break;
 689                 case 2:
 690                     tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
 691                     break;
 692                 case 3:
 693                     tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
 694                     break;
 695                 default:
 696                     tag = "comment";
 697                 }
 698
 699                 metadata_size  = avio_rb32(pb);
 700                 if ((res = get_metadata(s, tag, metadata_size)) < 0) {
 701                     av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
 702                     return res;
 703                 }
 704
 705                 if (metadata_size & 1)
 706                     avio_skip(pb, 1);
 707             }
 708             break;
 709         }
 710
 711         if (metadata_tag) {
 712             if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
 713                 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
 714                 return res;
 715             }
 716         }
 717         avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
 718     }
 719
 720     if (st->codecpar->codec_tag == ID_ANIM)
 721         avio_seek(pb, 12, SEEK_SET);
 722     else
 723         avio_seek(pb, iff->body_pos, SEEK_SET);
 724
 725     switch(st->codecpar->codec_type) {
 726     case AVMEDIA_TYPE_AUDIO:
 727         avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
 728
 729         if (st->codecpar->codec_tag == ID_16SV)
 730             st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
 731         else if (st->codecpar->codec_tag == ID_MAUD) {
 732             if (iff->maud_bits == 8 && !iff->maud_compression) {
 733                 st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
 734             } else if (iff->maud_bits == 16 && !iff->maud_compression) {
 735                 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
 736             } else if (iff->maud_bits ==  8 && iff->maud_compression == 2) {
 737                 st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW;
 738             } else if (iff->maud_bits ==  8 && iff->maud_compression == 3) {
 739                 st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW;
 740             } else {
 741                 avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
 742                 return AVERROR_PATCHWELCOME;
 743             }
 744         } else if (st->codecpar->codec_tag != ID_DSD &&
 745                    st->codecpar->codec_tag != ID_DST) {
 746             switch (iff->svx8_compression) {
 747             case COMP_NONE:
 748                 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
 749                 break;
 750             case COMP_FIB:
 751                 st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB;
 752                 break;
 753             case COMP_EXP:
 754                 st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP;
 755                 break;
 756             default:
 757                 av_log(s, AV_LOG_ERROR,
 758                        "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
 759                 return -1;
 760             }
 761         }
 762
 763         st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
 764         st->codecpar->bit_rate = st->codecpar->channels * st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample;
 765         st->codecpar->block_align = st->codecpar->channels * st->codecpar->bits_per_coded_sample;
 766         if ((st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) && st->codecpar->block_align <= 0)
 767             return AVERROR_INVALIDDATA;
 768         break;
 769
 770     case AVMEDIA_TYPE_VIDEO:
 771         iff->bpp          = st->codecpar->bits_per_coded_sample;
 772         if (st->codecpar->codec_tag == ID_ANIM)
 773             avpriv_set_pts_info(st, 32, 1, 60);
 774         if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
 775             iff->ham      = iff->bpp > 6 ? 6 : 4;
 776             st->codecpar->bits_per_coded_sample = 24;
 777         }
 778         iff->flags        = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
 779         iff->masking      = masking;
 780         iff->transparency = transparency;
 781
 782         if (!st->codecpar->extradata) {
 783             st->codecpar->extradata_size = IFF_EXTRA_VIDEO_SIZE;
 784             st->codecpar->extradata      = av_malloc(IFF_EXTRA_VIDEO_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
 785             if (!st->codecpar->extradata)
 786                 return AVERROR(ENOMEM);
 787         }
 788         av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
 789         buf = st->codecpar->extradata;
 790         bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
 791         bytestream_put_byte(&buf, iff->bitmap_compression);
 792         bytestream_put_byte(&buf, iff->bpp);
 793         bytestream_put_byte(&buf, iff->ham);
 794         bytestream_put_byte(&buf, iff->flags);
 795         bytestream_put_be16(&buf, iff->transparency);
 796         bytestream_put_byte(&buf, iff->masking);
 797         bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
 798         st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM;
 799         break;
 800     default:
 801         return -1;
 802     }
 803
 804     return 0;
 805 }
 806
 807 static unsigned get_anim_duration(uint8_t *buf, int size)
 808 {
 809     GetByteContext gb;
 810
 811     bytestream2_init(&gb, buf, size);
 812     bytestream2_skip(&gb, 4);
 813     while (bytestream2_get_bytes_left(&gb) > 8) {
 814         unsigned chunk = bytestream2_get_le32(&gb);
 815         unsigned size = bytestream2_get_be32(&gb);
 816
 817         if (chunk == ID_ANHD) {
 818             if (size < 40)
 819                 break;
 820             bytestream2_skip(&gb, 14);
 821             return bytestream2_get_be32(&gb);
 822         } else {
 823             bytestream2_skip(&gb, size + size & 1);
 824         }
 825     }
 826     return 10;
 827 }
 828
 829 static int iff_read_packet(AVFormatContext *s,
 830                            AVPacket *pkt)
 831 {
 832     IffDemuxContext *iff = s->priv_data;
 833     AVIOContext *pb = s->pb;
 834     AVStream *st = s->streams[0];
 835     int ret;
 836     int64_t pos = avio_tell(pb);
 837
 838     if (avio_feof(pb))
 839         return AVERROR_EOF;
 840     if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end)
 841         return AVERROR_EOF;
 842
 843     if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
 844         if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) {
 845             ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align));
 846         } else if (st->codecpar->codec_tag == ID_DST) {
 847             return read_dst_frame(s, pkt);
 848         } else {
 849             if (iff->body_size > INT_MAX || !iff->body_size)
 850                 return AVERROR_INVALIDDATA;
 851             ret = av_get_packet(pb, pkt, iff->body_size);
 852         }
 853     } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
 854                st->codecpar->codec_tag  == ID_ANIM) {
 855         uint64_t data_size, orig_pos;
 856         uint32_t chunk_id, chunk_id2;
 857
 858         while (!avio_feof(pb)) {
 859             if (avio_feof(pb))
 860                 return AVERROR_EOF;
 861
 862             orig_pos  = avio_tell(pb);
 863             chunk_id  = avio_rl32(pb);
 864             data_size = avio_rb32(pb);
 865             chunk_id2 = avio_rl32(pb);
 866
 867             if (chunk_id  == ID_FORM &&
 868                 chunk_id2 == ID_ILBM) {
 869                 avio_skip(pb, -4);
 870                 break;
 871             } else if (chunk_id == ID_FORM &&
 872                        chunk_id2 == ID_ANIM) {
 873                 continue;
 874             } else {
 875                 avio_skip(pb, data_size);
 876             }
 877         }
 878         ret = av_get_packet(pb, pkt, data_size);
 879         pkt->pos = orig_pos;
 880         pkt->duration = get_anim_duration(pkt->data, pkt->size);
 881         if (pos == 12)
 882             pkt->flags |= AV_PKT_FLAG_KEY;
 883     } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
 884                st->codecpar->codec_tag  != ID_ANIM) {
 885         if (iff->body_size > INT_MAX || !iff->body_size)
 886             return AVERROR_INVALIDDATA;
 887         ret = av_get_packet(pb, pkt, iff->body_size);
 888         pkt->pos = pos;
 889         if (pos == iff->body_pos)
 890             pkt->flags |= AV_PKT_FLAG_KEY;
 891     } else {
 892         av_assert0(0);
 893     }
 894
 895     if (ret < 0)
 896         return ret;
 897     pkt->stream_index = 0;
 898     return ret;
 899 }
 900
 901 AVInputFormat ff_iff_demuxer = {
 902     .name           = "iff",
 903     .long_name      = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
 904     .priv_data_size = sizeof(IffDemuxContext),
 905     .read_probe     = iff_probe,
 906     .read_header    = iff_read_header,
 907     .read_packet    = iff_read_packet,
 908     .flags          = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
 909 };