/libavformat/iff.c
C | 897 lines | 759 code | 99 blank | 39 comment | 210 complexity | c75f3f493faf2b747e10af6698a2a91d MD5 | raw file
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 102typedef enum { 103 COMP_NONE, 104 COMP_FIB, 105 COMP_EXP 106} svx8_compression_type; 107 108typedef 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 */ 127static 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 145static int iff_probe(const 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 165static 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 181static const uint32_t dsd_stereo[] = { DSD_SLFT, DSD_SRGT }; 182static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS }; 183static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS }; 184 185typedef struct { 186 uint64_t layout; 187 const uint32_t * dsd_layout; 188} DSDLayoutDesc; 189 190static 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 196static 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 202static const char * dsd_source_comment[] = { 203 "dsd_source_comment", 204 "analogue_source_comment", 205 "pcm_source_comment", 206}; 207 208static const char * dsd_history_comment[] = { 209 "general_remark", 210 "operator_name", 211 "creating_machine", 212 "timezone", 213 "file_revision" 214}; 215 216static 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 switch(tag) { 227 case MKTAG('D','I','A','R'): metadata_tag = "artist"; break; 228 case MKTAG('D','I','T','I'): metadata_tag = "title"; break; 229 } 230 231 if (metadata_tag && size > 4) { 232 unsigned int tag_size = avio_rb32(pb); 233 int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4)); 234 if (ret < 0) { 235 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag); 236 return ret; 237 } 238 } 239 240 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1)); 241 } 242 243 return 0; 244} 245 246static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof) 247{ 248 AVIOContext *pb = s->pb; 249 char abss[24]; 250 int hour, min, sec, i, ret, config; 251 int dsd_layout[6]; 252 ID3v2ExtraMeta *id3v2_extra_meta; 253 254 while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) { 255 uint32_t tag = avio_rl32(pb); 256 uint64_t size = avio_rb64(pb); 257 uint64_t orig_pos = avio_tell(pb); 258 259 switch(tag) { 260 case MKTAG('A','B','S','S'): 261 if (size < 8) 262 return AVERROR_INVALIDDATA; 263 hour = avio_rb16(pb); 264 min = avio_r8(pb); 265 sec = avio_r8(pb); 266 snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb)); 267 av_dict_set(&st->metadata, "absolute_start_time", abss, 0); 268 break; 269 270 case MKTAG('C','H','N','L'): 271 if (size < 2) 272 return AVERROR_INVALIDDATA; 273 st->codecpar->channels = avio_rb16(pb); 274 if (size < 2 + st->codecpar->channels * 4) 275 return AVERROR_INVALIDDATA; 276 st->codecpar->channel_layout = 0; 277 if (st->codecpar->channels > FF_ARRAY_ELEMS(dsd_layout)) { 278 avpriv_request_sample(s, "channel layout"); 279 break; 280 } 281 for (i = 0; i < st->codecpar->channels; i++) 282 dsd_layout[i] = avio_rl32(pb); 283 for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) { 284 const DSDLayoutDesc * d = &dsd_channel_layout[i]; 285 if (av_get_channel_layout_nb_channels(d->layout) == st->codecpar->channels && 286 !memcmp(d->dsd_layout, dsd_layout, st->codecpar->channels * sizeof(uint32_t))) { 287 st->codecpar->channel_layout = d->layout; 288 break; 289 } 290 } 291 break; 292 293 case MKTAG('C','M','P','R'): 294 if (size < 4) 295 return AVERROR_INVALIDDATA; 296 st->codecpar->codec_tag = tag = avio_rl32(pb); 297 st->codecpar->codec_id = ff_codec_get_id(dsd_codec_tags, tag); 298 if (!st->codecpar->codec_id) { 299 av_log(s, AV_LOG_ERROR, "'%s' compression is not supported\n", 300 av_fourcc2str(tag)); 301 return AVERROR_PATCHWELCOME; 302 } 303 break; 304 305 case MKTAG('F','S',' ',' '): 306 if (size < 4) 307 return AVERROR_INVALIDDATA; 308 st->codecpar->sample_rate = avio_rb32(pb) / 8; 309 break; 310 311 case MKTAG('I','D','3',' '): 312 id3v2_extra_meta = NULL; 313 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size); 314 if (id3v2_extra_meta) { 315 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0 || 316 (ret = ff_id3v2_parse_chapters(s, &id3v2_extra_meta)) < 0) { 317 ff_id3v2_free_extra_meta(&id3v2_extra_meta); 318 return ret; 319 } 320 ff_id3v2_free_extra_meta(&id3v2_extra_meta); 321 } 322 323 if (size < avio_tell(pb) - orig_pos) { 324 av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n"); 325 return AVERROR_INVALIDDATA; 326 } 327 break; 328 329 case MKTAG('L','S','C','O'): 330 if (size < 2) 331 return AVERROR_INVALIDDATA; 332 config = avio_rb16(pb); 333 if (config != 0xFFFF) { 334 if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config)) 335 st->codecpar->channel_layout = dsd_loudspeaker_config[config]; 336 if (!st->codecpar->channel_layout) 337 avpriv_request_sample(s, "loudspeaker configuration %d", config); 338 } 339 break; 340 } 341 342 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1)); 343 } 344 345 return 0; 346} 347 348static int read_dst_frame(AVFormatContext *s, AVPacket *pkt) 349{ 350 IffDemuxContext *iff = s->priv_data; 351 AVIOContext *pb = s->pb; 352 uint32_t chunk_id; 353 uint64_t chunk_pos, data_pos, data_size; 354 int ret = AVERROR_EOF; 355 356 while (!avio_feof(pb)) { 357 chunk_pos = avio_tell(pb); 358 if (chunk_pos >= iff->body_end) 359 return AVERROR_EOF; 360 361 chunk_id = avio_rl32(pb); 362 data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb); 363 data_pos = avio_tell(pb); 364 365 if (data_size < 1) 366 return AVERROR_INVALIDDATA; 367 368 switch (chunk_id) { 369 case ID_DSTF: 370 if (!pkt) { 371 iff->body_pos = avio_tell(pb) - (iff->is_64bit ? 12 : 8); 372 iff->body_size = iff->body_end - iff->body_pos; 373 return 0; 374 } 375 ret = av_get_packet(pb, pkt, data_size); 376 if (ret < 0) 377 return ret; 378 if (data_size & 1) 379 avio_skip(pb, 1); 380 pkt->flags |= AV_PKT_FLAG_KEY; 381 pkt->stream_index = 0; 382 pkt->duration = 588 * s->streams[0]->codecpar->sample_rate / 44100; 383 pkt->pos = chunk_pos; 384 385 chunk_pos = avio_tell(pb); 386 if (chunk_pos >= iff->body_end) 387 return 0; 388 389 avio_seek(pb, chunk_pos, SEEK_SET); 390 return 0; 391 392 case ID_FRTE: 393 if (data_size < 4) 394 return AVERROR_INVALIDDATA; 395 s->streams[0]->duration = avio_rb32(pb) * 588LL * s->streams[0]->codecpar->sample_rate / 44100; 396 break; 397 } 398 399 avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1)); 400 } 401 402 return ret; 403} 404 405static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8}; 406static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8}; 407static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8}; 408static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8}; 409static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8}; 410 411static int iff_read_header(AVFormatContext *s) 412{ 413 IffDemuxContext *iff = s->priv_data; 414 AVIOContext *pb = s->pb; 415 AVStream *st; 416 uint8_t *buf; 417 uint32_t chunk_id; 418 uint64_t data_size; 419 uint32_t screenmode = 0, num, den; 420 unsigned transparency = 0; 421 unsigned masking = 0; // no mask 422 uint8_t fmt[16]; 423 int fmt_size; 424 425 st = avformat_new_stream(s, NULL); 426 if (!st) 427 return AVERROR(ENOMEM); 428 429 st->codecpar->channels = 1; 430 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; 431 iff->is_64bit = avio_rl32(pb) == ID_FRM8; 432 avio_skip(pb, iff->is_64bit ? 8 : 4); 433 // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content 434 st->codecpar->codec_tag = avio_rl32(pb); 435 if (st->codecpar->codec_tag == ID_ANIM) { 436 avio_skip(pb, 12); 437 } 438 iff->bitmap_compression = -1; 439 iff->svx8_compression = -1; 440 iff->maud_bits = -1; 441 iff->maud_compression = -1; 442 443 while(!avio_feof(pb)) { 444 uint64_t orig_pos; 445 int res; 446 const char *metadata_tag = NULL; 447 int version, nb_comments, i; 448 chunk_id = avio_rl32(pb); 449 data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb); 450 orig_pos = avio_tell(pb); 451 452 switch(chunk_id) { 453 case ID_VHDR: 454 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; 455 456 if (data_size < 14) 457 return AVERROR_INVALIDDATA; 458 avio_skip(pb, 12); 459 st->codecpar->sample_rate = avio_rb16(pb); 460 if (data_size >= 16) { 461 avio_skip(pb, 1); 462 iff->svx8_compression = avio_r8(pb); 463 } 464 break; 465 466 case ID_MHDR: 467 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; 468 469 if (data_size < 32) 470 return AVERROR_INVALIDDATA; 471 avio_skip(pb, 4); 472 iff->maud_bits = avio_rb16(pb); 473 avio_skip(pb, 2); 474 num = avio_rb32(pb); 475 den = avio_rb16(pb); 476 if (!den) 477 return AVERROR_INVALIDDATA; 478 avio_skip(pb, 2); 479 st->codecpar->sample_rate = num / den; 480 st->codecpar->channels = avio_rb16(pb); 481 iff->maud_compression = avio_rb16(pb); 482 if (st->codecpar->channels == 1) 483 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; 484 else if (st->codecpar->channels == 2) 485 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; 486 break; 487 488 case ID_ABIT: 489 case ID_BODY: 490 case ID_DBOD: 491 case ID_DSD: 492 case ID_DST: 493 case ID_MDAT: 494 iff->body_pos = avio_tell(pb); 495 iff->body_end = iff->body_pos + data_size; 496 iff->body_size = data_size; 497 if (chunk_id == ID_DST) { 498 int ret = read_dst_frame(s, NULL); 499 if (ret < 0) 500 return ret; 501 } 502 break; 503 504 case ID_CHAN: 505 if (data_size < 4) 506 return AVERROR_INVALIDDATA; 507 if (avio_rb32(pb) < 6) { 508 st->codecpar->channels = 1; 509 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; 510 } else { 511 st->codecpar->channels = 2; 512 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; 513 } 514 break; 515 516 case ID_CAMG: 517 if (data_size < 4) 518 return AVERROR_INVALIDDATA; 519 screenmode = avio_rb32(pb); 520 break; 521 522 case ID_CMAP: 523 if (data_size < 3 || data_size > 768 || data_size % 3) { 524 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n", 525 data_size); 526 return AVERROR_INVALIDDATA; 527 } 528 res = ff_alloc_extradata(st->codecpar, 529 data_size + IFF_EXTRA_VIDEO_SIZE); 530 if (res < 0) 531 return res; 532 if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) { 533 av_freep(&st->codecpar->extradata); 534 st->codecpar->extradata_size = 0; 535 return AVERROR(EIO); 536 } 537 break; 538 539 case ID_BMHD: 540 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; 541 if (data_size <= 8) 542 return AVERROR_INVALIDDATA; 543 st->codecpar->width = avio_rb16(pb); 544 st->codecpar->height = avio_rb16(pb); 545 avio_skip(pb, 4); // x, y offset 546 st->codecpar->bits_per_coded_sample = avio_r8(pb); 547 if (data_size >= 10) 548 masking = avio_r8(pb); 549 if (data_size >= 11) 550 iff->bitmap_compression = avio_r8(pb); 551 if (data_size >= 14) { 552 avio_skip(pb, 1); // padding 553 transparency = avio_rb16(pb); 554 } 555 if (data_size >= 16) { 556 st->sample_aspect_ratio.num = avio_r8(pb); 557 st->sample_aspect_ratio.den = avio_r8(pb); 558 } 559 break; 560 561 case ID_ANHD: 562 break; 563 564 case ID_DPAN: 565 avio_skip(pb, 2); 566 st->duration = avio_rb16(pb); 567 break; 568 569 case ID_DPEL: 570 if (data_size < 4 || (data_size & 3)) 571 return AVERROR_INVALIDDATA; 572 if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0) 573 return fmt_size; 574 if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24))) 575 st->codecpar->format = AV_PIX_FMT_RGB24; 576 else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba))) 577 st->codecpar->format = AV_PIX_FMT_RGBA; 578 else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra))) 579 st->codecpar->format = AV_PIX_FMT_BGRA; 580 else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb))) 581 st->codecpar->format = AV_PIX_FMT_ARGB; 582 else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr))) 583 st->codecpar->format = AV_PIX_FMT_ABGR; 584 else { 585 avpriv_request_sample(s, "color format %.16s", fmt); 586 return AVERROR_PATCHWELCOME; 587 } 588 break; 589 590 case ID_DGBL: 591 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; 592 if (data_size < 8) 593 return AVERROR_INVALIDDATA; 594 st->codecpar->width = avio_rb16(pb); 595 st->codecpar->height = avio_rb16(pb); 596 iff->bitmap_compression = avio_rb16(pb); 597 st->sample_aspect_ratio.num = avio_r8(pb); 598 st->sample_aspect_ratio.den = avio_r8(pb); 599 st->codecpar->bits_per_coded_sample = 24; 600 break; 601 602 case ID_DLOC: 603 if (data_size < 4) 604 return AVERROR_INVALIDDATA; 605 st->codecpar->width = avio_rb16(pb); 606 st->codecpar->height = avio_rb16(pb); 607 break; 608 609 case ID_TVDC: 610 if (data_size < sizeof(iff->tvdc)) 611 return AVERROR_INVALIDDATA; 612 res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc)); 613 if (res < 0) 614 return res; 615 break; 616 617 case ID_ANNO: 618 case ID_TEXT: metadata_tag = "comment"; break; 619 case ID_AUTH: metadata_tag = "artist"; break; 620 case ID_COPYRIGHT: metadata_tag = "copyright"; break; 621 case ID_NAME: metadata_tag = "title"; break; 622 623 /* DSD tags */ 624 625 case MKTAG('F','V','E','R'): 626 if (data_size < 4) 627 return AVERROR_INVALIDDATA; 628 version = avio_rb32(pb); 629 av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF); 630 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; 631 break; 632 633 case MKTAG('D','I','I','N'): 634 res = parse_dsd_diin(s, st, orig_pos + data_size); 635 if (res < 0) 636 return res; 637 break; 638 639 case MKTAG('P','R','O','P'): 640 if (data_size < 4) 641 return AVERROR_INVALIDDATA; 642 if (avio_rl32(pb) != MKTAG('S','N','D',' ')) { 643 avpriv_request_sample(s, "unknown property type"); 644 break; 645 } 646 res = parse_dsd_prop(s, st, orig_pos + data_size); 647 if (res < 0) 648 return res; 649 break; 650 651 case MKTAG('C','O','M','T'): 652 if (data_size < 2) 653 return AVERROR_INVALIDDATA; 654 nb_comments = avio_rb16(pb); 655 for (i = 0; i < nb_comments; i++) { 656 int year, mon, day, hour, min, type, ref; 657 char tmp[24]; 658 const char *tag; 659 int metadata_size; 660 661 year = avio_rb16(pb); 662 mon = avio_r8(pb); 663 day = avio_r8(pb); 664 hour = avio_r8(pb); 665 min = avio_r8(pb); 666 snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min); 667 av_dict_set(&st->metadata, "comment_time", tmp, 0); 668 669 type = avio_rb16(pb); 670 ref = avio_rb16(pb); 671 switch (type) { 672 case 1: 673 if (!i) 674 tag = "channel_comment"; 675 else { 676 snprintf(tmp, sizeof(tmp), "channel%d_comment", ref); 677 tag = tmp; 678 } 679 break; 680 case 2: 681 tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment"; 682 break; 683 case 3: 684 tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history"; 685 break; 686 default: 687 tag = "comment"; 688 } 689 690 metadata_size = avio_rb32(pb); 691 if ((res = get_metadata(s, tag, metadata_size)) < 0) { 692 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag); 693 return res; 694 } 695 696 if (metadata_size & 1) 697 avio_skip(pb, 1); 698 } 699 break; 700 } 701 702 if (metadata_tag) { 703 if ((res = get_metadata(s, metadata_tag, data_size)) < 0) { 704 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag); 705 return res; 706 } 707 } 708 avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1)); 709 } 710 711 if (st->codecpar->codec_tag == ID_ANIM) 712 avio_seek(pb, 12, SEEK_SET); 713 else 714 avio_seek(pb, iff->body_pos, SEEK_SET); 715 716 switch(st->codecpar->codec_type) { 717 case AVMEDIA_TYPE_AUDIO: 718 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate); 719 720 if (st->codecpar->codec_tag == ID_16SV) 721 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR; 722 else if (st->codecpar->codec_tag == ID_MAUD) { 723 if (iff->maud_bits == 8 && !iff->maud_compression) { 724 st->codecpar->codec_id = AV_CODEC_ID_PCM_U8; 725 } else if (iff->maud_bits == 16 && !iff->maud_compression) { 726 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; 727 } else if (iff->maud_bits == 8 && iff->maud_compression == 2) { 728 st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW; 729 } else if (iff->maud_bits == 8 && iff->maud_compression == 3) { 730 st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; 731 } else { 732 avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits); 733 return AVERROR_PATCHWELCOME; 734 } 735 } else if (st->codecpar->codec_tag != ID_DSD && 736 st->codecpar->codec_tag != ID_DST) { 737 switch (iff->svx8_compression) { 738 case COMP_NONE: 739 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR; 740 break; 741 case COMP_FIB: 742 st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB; 743 break; 744 case COMP_EXP: 745 st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP; 746 break; 747 default: 748 av_log(s, AV_LOG_ERROR, 749 "Unknown SVX8 compression method '%d'\n", iff->svx8_compression); 750 return -1; 751 } 752 } 753 754 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id); 755 st->codecpar->bit_rate = (int64_t)st->codecpar->channels * st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample; 756 st->codecpar->block_align = st->codecpar->channels * st->codecpar->bits_per_coded_sample; 757 if (st->codecpar->codec_tag == ID_DSD && st->codecpar->block_align <= 0) 758 return AVERROR_INVALIDDATA; 759 break; 760 761 case AVMEDIA_TYPE_VIDEO: 762 iff->bpp = st->codecpar->bits_per_coded_sample; 763 if (st->codecpar->codec_tag == ID_ANIM) 764 avpriv_set_pts_info(st, 32, 1, 60); 765 if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) { 766 iff->ham = iff->bpp > 6 ? 6 : 4; 767 st->codecpar->bits_per_coded_sample = 24; 768 } 769 iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8; 770 iff->masking = masking; 771 iff->transparency = transparency; 772 773 if (!st->codecpar->extradata) { 774 int ret = ff_alloc_extradata(st->codecpar, IFF_EXTRA_VIDEO_SIZE); 775 if (ret < 0) 776 return ret; 777 } 778 av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE); 779 buf = st->codecpar->extradata; 780 bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE); 781 bytestream_put_byte(&buf, iff->bitmap_compression); 782 bytestream_put_byte(&buf, iff->bpp); 783 bytestream_put_byte(&buf, iff->ham); 784 bytestream_put_byte(&buf, iff->flags); 785 bytestream_put_be16(&buf, iff->transparency); 786 bytestream_put_byte(&buf, iff->masking); 787 bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc)); 788 st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM; 789 break; 790 default: 791 return -1; 792 } 793 794 return 0; 795} 796 797static unsigned get_anim_duration(uint8_t *buf, int size) 798{ 799 GetByteContext gb; 800 801 bytestream2_init(&gb, buf, size); 802 bytestream2_skip(&gb, 4); 803 while (bytestream2_get_bytes_left(&gb) > 8) { 804 unsigned chunk = bytestream2_get_le32(&gb); 805 unsigned size = bytestream2_get_be32(&gb); 806 807 if (chunk == ID_ANHD) { 808 if (size < 40) 809 break; 810 bytestream2_skip(&gb, 14); 811 return bytestream2_get_be32(&gb); 812 } else { 813 bytestream2_skip(&gb, size + size & 1); 814 } 815 } 816 return 10; 817} 818 819static int iff_read_packet(AVFormatContext *s, 820 AVPacket *pkt) 821{ 822 IffDemuxContext *iff = s->priv_data; 823 AVIOContext *pb = s->pb; 824 AVStream *st = s->streams[0]; 825 int ret; 826 int64_t pos = avio_tell(pb); 827 828 if (avio_feof(pb)) 829 return AVERROR_EOF; 830 if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end) 831 return AVERROR_EOF; 832 833 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { 834 if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) { 835 ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align)); 836 } else if (st->codecpar->codec_tag == ID_DST) { 837 return read_dst_frame(s, pkt); 838 } else { 839 if (iff->body_size > INT_MAX) 840 return AVERROR_INVALIDDATA; 841 ret = av_get_packet(pb, pkt, iff->body_size); 842 } 843 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && 844 st->codecpar->codec_tag == ID_ANIM) { 845 uint64_t data_size, orig_pos; 846 uint32_t chunk_id, chunk_id2; 847 848 while (!avio_feof(pb)) { 849 if (avio_feof(pb)) 850 return AVERROR_EOF; 851 852 orig_pos = avio_tell(pb); 853 chunk_id = avio_rl32(pb); 854 data_size = avio_rb32(pb); 855 chunk_id2 = avio_rl32(pb); 856 857 if (chunk_id == ID_FORM && 858 chunk_id2 == ID_ILBM) { 859 avio_skip(pb, -4); 860 break; 861 } else if (chunk_id == ID_FORM && 862 chunk_id2 == ID_ANIM) { 863 continue; 864 } else { 865 avio_skip(pb, data_size); 866 } 867 } 868 ret = av_get_packet(pb, pkt, data_size); 869 pkt->pos = orig_pos; 870 pkt->duration = get_anim_duration(pkt->data, pkt->size); 871 if (pos == 12) 872 pkt->flags |= AV_PKT_FLAG_KEY; 873 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && 874 st->codecpar->codec_tag != ID_ANIM) { 875 ret = av_get_packet(pb, pkt, iff->body_size); 876 pkt->pos = pos; 877 if (pos == iff->body_pos) 878 pkt->flags |= AV_PKT_FLAG_KEY; 879 } else { 880 av_assert0(0); 881 } 882 883 if (ret < 0) 884 return ret; 885 pkt->stream_index = 0; 886 return ret; 887} 888 889AVInputFormat ff_iff_demuxer = { 890 .name = "iff", 891 .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"), 892 .priv_data_size = sizeof(IffDemuxContext), 893 .read_probe = iff_probe, 894 .read_header = iff_read_header, 895 .read_packet = iff_read_packet, 896 .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK, 897};