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>
6 * This file is part of FFmpeg.
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.
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.
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
26 * by Jaikrishnan Menon
27 * for more information on the .iff file format, visit:
28 * http://wiki.multimedia.cx/index.php?title=IFF
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"
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')
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')
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.
100 #define IFF_EXTRA_VIDEO_SIZE 41
106 } svx8_compression_type;
108 typedef struct IffDemuxContext {
109 int is_64bit; ///< chunk size is 64-bit
113 svx8_compression_type svx8_compression;
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
126 /* Metadata string read */
127 static int get_metadata(AVFormatContext *s,
128 const char *const tag,
129 const unsigned data_size)
131 uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
134 return AVERROR(ENOMEM);
136 if (avio_read(s->pb, buf, data_size) != data_size) {
141 av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
145 static int iff_probe(const AVProbeData *p)
147 const uint8_t *d = p->buf;
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;
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 },
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',' ')
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 };
187 const uint32_t * dsd_layout;
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 },
196 static const uint64_t dsd_loudspeaker_config[] = {
199 AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1,
202 static const char * dsd_source_comment[] = {
203 "dsd_source_comment",
204 "analogue_source_comment",
205 "pcm_source_comment",
208 static const char * dsd_history_comment[] = {
216 static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
218 AVIOContext *pb = s->pb;
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;
226 if (size >= INT64_MAX)
227 return AVERROR_INVALIDDATA;
230 case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
231 case MKTAG('D','I','T','I'): metadata_tag = "title"; break;
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));
238 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
243 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
249 static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
251 AVIOContext *pb = s->pb;
253 int hour, min, sec, i, ret, config;
255 ID3v2ExtraMeta *id3v2_extra_meta;
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);
262 if (size >= INT64_MAX)
263 return AVERROR_INVALIDDATA;
266 case MKTAG('A','B','S','S'):
268 return AVERROR_INVALIDDATA;
269 hour = avio_rb16(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);
276 case MKTAG('C','H','N','L'):
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");
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;
299 case MKTAG('C','M','P','R'):
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, "'%s' compression is not supported\n",
307 return AVERROR_PATCHWELCOME;
311 case MKTAG('F','S',' ',' '):
313 return AVERROR_INVALIDDATA;
314 st->codecpar->sample_rate = avio_rb32(pb) / 8;
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 (ret = ff_id3v2_parse_chapters(s, id3v2_extra_meta)) < 0) {
323 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
326 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
329 if (size < avio_tell(pb) - orig_pos) {
330 av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
331 return AVERROR_INVALIDDATA;
335 case MKTAG('L','S','C','O'):
337 return AVERROR_INVALIDDATA;
338 config = avio_rb16(pb);
339 if (config != 0xFFFF) {
340 if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config))
341 st->codecpar->channel_layout = dsd_loudspeaker_config[config];
342 if (!st->codecpar->channel_layout)
343 avpriv_request_sample(s, "loudspeaker configuration %d", config);
348 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
354 static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
356 IffDemuxContext *iff = s->priv_data;
357 AVIOContext *pb = s->pb;
359 uint64_t chunk_pos, data_pos, data_size;
360 int ret = AVERROR_EOF;
362 while (!avio_feof(pb)) {
363 chunk_pos = avio_tell(pb);
364 if (chunk_pos >= iff->body_end)
367 chunk_id = avio_rl32(pb);
368 data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
369 data_pos = avio_tell(pb);
371 if (data_size < 1 || data_size >= INT64_MAX)
372 return AVERROR_INVALIDDATA;
377 iff->body_pos = avio_tell(pb) - (iff->is_64bit ? 12 : 8);
378 iff->body_size = iff->body_end - iff->body_pos;
381 ret = av_get_packet(pb, pkt, data_size);
386 pkt->flags |= AV_PKT_FLAG_KEY;
387 pkt->stream_index = 0;
388 pkt->duration = 588 * s->streams[0]->codecpar->sample_rate / 44100;
389 pkt->pos = chunk_pos;
391 chunk_pos = avio_tell(pb);
392 if (chunk_pos >= iff->body_end)
395 avio_seek(pb, chunk_pos, SEEK_SET);
400 return AVERROR_INVALIDDATA;
401 s->streams[0]->duration = avio_rb32(pb) * 588LL * s->streams[0]->codecpar->sample_rate / 44100;
405 avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1));
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};
417 static int iff_read_header(AVFormatContext *s)
419 IffDemuxContext *iff = s->priv_data;
420 AVIOContext *pb = s->pb;
425 uint32_t screenmode = 0, num, den;
426 unsigned transparency = 0;
427 unsigned masking = 0; // no mask
431 st = avformat_new_stream(s, NULL);
433 return AVERROR(ENOMEM);
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) {
444 iff->bitmap_compression = -1;
445 iff->svx8_compression = -1;
447 iff->maud_compression = -1;
449 while(!avio_feof(pb)) {
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);
458 if (data_size >= INT64_MAX)
459 return AVERROR_INVALIDDATA;
463 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
466 return AVERROR_INVALIDDATA;
468 st->codecpar->sample_rate = avio_rb16(pb);
469 if (data_size >= 16) {
471 iff->svx8_compression = avio_r8(pb);
476 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
479 return AVERROR_INVALIDDATA;
481 iff->maud_bits = avio_rb16(pb);
486 return AVERROR_INVALIDDATA;
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;
503 iff->body_pos = avio_tell(pb);
504 iff->body_end = iff->body_pos + data_size;
505 iff->body_size = data_size;
506 if (chunk_id == ID_DST) {
507 int ret = read_dst_frame(s, NULL);
515 return AVERROR_INVALIDDATA;
516 if (avio_rb32(pb) < 6) {
517 st->codecpar->channels = 1;
518 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
520 st->codecpar->channels = 2;
521 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
527 return AVERROR_INVALIDDATA;
528 screenmode = avio_rb32(pb);
532 if (data_size < 3 || data_size > 768 || data_size % 3) {
533 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
535 return AVERROR_INVALIDDATA;
537 res = ff_alloc_extradata(st->codecpar,
538 data_size + IFF_EXTRA_VIDEO_SIZE);
541 if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) {
542 av_freep(&st->codecpar->extradata);
543 st->codecpar->extradata_size = 0;
549 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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);
557 masking = avio_r8(pb);
559 iff->bitmap_compression = avio_r8(pb);
560 if (data_size >= 14) {
561 avio_skip(pb, 1); // padding
562 transparency = avio_rb16(pb);
564 if (data_size >= 16) {
565 st->sample_aspect_ratio.num = avio_r8(pb);
566 st->sample_aspect_ratio.den = avio_r8(pb);
575 st->duration = avio_rb16(pb);
579 if (data_size < 4 || (data_size & 3))
580 return AVERROR_INVALIDDATA;
581 if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
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;
594 avpriv_request_sample(s, "color format %.16s", fmt);
595 return AVERROR_PATCHWELCOME;
600 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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;
613 return AVERROR_INVALIDDATA;
614 st->codecpar->width = avio_rb16(pb);
615 st->codecpar->height = avio_rb16(pb);
619 if (data_size < sizeof(iff->tvdc))
620 return AVERROR_INVALIDDATA;
621 res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
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;
634 case MKTAG('F','V','E','R'):
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;
642 case MKTAG('D','I','I','N'):
643 res = parse_dsd_diin(s, st, orig_pos + data_size);
648 case MKTAG('P','R','O','P'):
650 return AVERROR_INVALIDDATA;
651 if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
652 avpriv_request_sample(s, "unknown property type");
655 res = parse_dsd_prop(s, st, orig_pos + data_size);
660 case MKTAG('C','O','M','T'):
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;
670 year = avio_rb16(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);
678 type = avio_rb16(pb);
683 tag = "channel_comment";
685 snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
690 tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
693 tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
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);
705 if (metadata_size & 1)
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);
717 avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
720 if (st->codecpar->codec_tag == ID_ANIM)
721 avio_seek(pb, 12, SEEK_SET);
723 avio_seek(pb, iff->body_pos, SEEK_SET);
725 switch(st->codecpar->codec_type) {
726 case AVMEDIA_TYPE_AUDIO:
727 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
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;
741 avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
742 return AVERROR_PATCHWELCOME;
744 } else if (st->codecpar->codec_tag != ID_DSD &&
745 st->codecpar->codec_tag != ID_DST) {
746 switch (iff->svx8_compression) {
748 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
751 st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB;
754 st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP;
757 av_log(s, AV_LOG_ERROR,
758 "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
763 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
764 st->codecpar->bit_rate = (int64_t)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;
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;
778 iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
779 iff->masking = masking;
780 iff->transparency = transparency;
782 if (!st->codecpar->extradata) {
783 int ret = ff_alloc_extradata(st->codecpar, IFF_EXTRA_VIDEO_SIZE);
787 av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
788 buf = st->codecpar->extradata;
789 bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
790 bytestream_put_byte(&buf, iff->bitmap_compression);
791 bytestream_put_byte(&buf, iff->bpp);
792 bytestream_put_byte(&buf, iff->ham);
793 bytestream_put_byte(&buf, iff->flags);
794 bytestream_put_be16(&buf, iff->transparency);
795 bytestream_put_byte(&buf, iff->masking);
796 bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
797 st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM;
806 static unsigned get_anim_duration(uint8_t *buf, int size)
810 bytestream2_init(&gb, buf, size);
811 bytestream2_skip(&gb, 4);
812 while (bytestream2_get_bytes_left(&gb) > 8) {
813 unsigned chunk = bytestream2_get_le32(&gb);
814 unsigned size = bytestream2_get_be32(&gb);
816 if (chunk == ID_ANHD) {
819 bytestream2_skip(&gb, 14);
820 return bytestream2_get_be32(&gb);
822 bytestream2_skip(&gb, size + size & 1);
828 static int iff_read_packet(AVFormatContext *s,
831 IffDemuxContext *iff = s->priv_data;
832 AVIOContext *pb = s->pb;
833 AVStream *st = s->streams[0];
835 int64_t pos = avio_tell(pb);
839 if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end)
842 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
843 if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) {
844 ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align));
845 } else if (st->codecpar->codec_tag == ID_DST) {
846 return read_dst_frame(s, pkt);
848 if (iff->body_size > INT_MAX || !iff->body_size)
849 return AVERROR_INVALIDDATA;
850 ret = av_get_packet(pb, pkt, iff->body_size);
852 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
853 st->codecpar->codec_tag == ID_ANIM) {
854 uint64_t data_size, orig_pos;
855 uint32_t chunk_id, chunk_id2;
857 while (!avio_feof(pb)) {
861 orig_pos = avio_tell(pb);
862 chunk_id = avio_rl32(pb);
863 data_size = avio_rb32(pb);
864 chunk_id2 = avio_rl32(pb);
866 if (chunk_id == ID_FORM &&
867 chunk_id2 == ID_ILBM) {
870 } else if (chunk_id == ID_FORM &&
871 chunk_id2 == ID_ANIM) {
874 avio_skip(pb, data_size);
877 ret = av_get_packet(pb, pkt, data_size);
879 pkt->duration = get_anim_duration(pkt->data, pkt->size);
881 pkt->flags |= AV_PKT_FLAG_KEY;
882 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
883 st->codecpar->codec_tag != ID_ANIM) {
884 if (iff->body_size > INT_MAX || !iff->body_size)
885 return AVERROR_INVALIDDATA;
886 ret = av_get_packet(pb, pkt, iff->body_size);
888 if (pos == iff->body_pos)
889 pkt->flags |= AV_PKT_FLAG_KEY;
896 pkt->stream_index = 0;
900 AVInputFormat ff_iff_demuxer = {
902 .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
903 .priv_data_size = sizeof(IffDemuxContext),
904 .read_probe = iff_probe,
905 .read_header = iff_read_header,
906 .read_packet = iff_read_packet,
907 .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,