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',' ')
63 #define ID_FORM MKTAG('F','O','R','M')
64 #define ID_FRM8 MKTAG('F','R','M','8')
65 #define ID_ANNO MKTAG('A','N','N','O')
66 #define ID_AUTH MKTAG('A','U','T','H')
67 #define ID_CHRS MKTAG('C','H','R','S')
68 #define ID_COPYRIGHT MKTAG('(','c',')',' ')
69 #define ID_CSET MKTAG('C','S','E','T')
70 #define ID_FVER MKTAG('F','V','E','R')
71 #define ID_NAME MKTAG('N','A','M','E')
72 #define ID_TEXT MKTAG('T','E','X','T')
73 #define ID_ABIT MKTAG('A','B','I','T')
74 #define ID_BODY MKTAG('B','O','D','Y')
75 #define ID_DBOD MKTAG('D','B','O','D')
76 #define ID_DPEL MKTAG('D','P','E','L')
77 #define ID_DLOC MKTAG('D','L','O','C')
78 #define ID_TVDC MKTAG('T','V','D','C')
85 * This number of bytes if added at the beginning of each AVPacket
86 * which contain additional information about video properties
87 * which has to be shared between demuxer and decoder.
88 * This number may change between frames, e.g. the demuxer might
89 * set it to smallest possible size of 2 to indicate that there's
90 * no extradata changing in this frame.
92 #define IFF_EXTRA_VIDEO_SIZE 41
98 } svx8_compression_type;
101 int is_64bit; ///< chunk size is 64-bit
105 svx8_compression_type svx8_compression;
107 unsigned maud_compression;
108 unsigned bitmap_compression; ///< delta compression method used
109 unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
110 unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
111 unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
112 unsigned transparency; ///< transparency color index in palette
113 unsigned masking; ///< masking method used
114 uint8_t tvdc[32]; ///< TVDC lookup table
117 /* Metadata string read */
118 static int get_metadata(AVFormatContext *s,
119 const char *const tag,
120 const unsigned data_size)
122 uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
125 return AVERROR(ENOMEM);
127 if (avio_read(s->pb, buf, data_size) != data_size) {
132 av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
136 static int iff_probe(AVProbeData *p)
138 const uint8_t *d = p->buf;
140 if ( (AV_RL32(d) == ID_FORM &&
141 (AV_RL32(d+8) == ID_8SVX ||
142 AV_RL32(d+8) == ID_16SV ||
143 AV_RL32(d+8) == ID_MAUD ||
144 AV_RL32(d+8) == ID_PBM ||
145 AV_RL32(d+8) == ID_ACBM ||
146 AV_RL32(d+8) == ID_DEEP ||
147 AV_RL32(d+8) == ID_ILBM ||
148 AV_RL32(d+8) == ID_RGB8 ||
149 AV_RL32(d+8) == ID_RGB8 ||
150 AV_RL32(d+8) == ID_RGBN)) ||
151 (AV_RL32(d) == ID_FRM8 && AV_RL32(d+12) == ID_DSD))
152 return AVPROBE_SCORE_MAX;
156 static const AVCodecTag dsd_codec_tags[] = {
157 { AV_CODEC_ID_DSD_MSBF, ID_DSD },
158 { AV_CODEC_ID_NONE, 0 },
162 #define DSD_SLFT MKTAG('S','L','F','T')
163 #define DSD_SRGT MKTAG('S','R','G','T')
164 #define DSD_MLFT MKTAG('M','L','F','T')
165 #define DSD_MRGT MKTAG('M','R','G','T')
166 #define DSD_C MKTAG('C',' ',' ',' ')
167 #define DSD_LS MKTAG('L','S',' ',' ')
168 #define DSD_RS MKTAG('R','S',' ',' ')
169 #define DSD_LFE MKTAG('L','F','E',' ')
171 static const uint32_t dsd_stereo[] = { DSD_SLFT, DSD_SRGT };
172 static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS };
173 static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS };
177 const uint32_t * dsd_layout;
180 static const DSDLayoutDesc dsd_channel_layout[] = {
181 { AV_CH_LAYOUT_STEREO, dsd_stereo },
182 { AV_CH_LAYOUT_5POINT0, dsd_5point0 },
183 { AV_CH_LAYOUT_5POINT1, dsd_5point1 },
186 static const uint64_t dsd_loudspeaker_config[] = {
189 AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1,
192 static const char * dsd_source_comment[] = {
193 "dsd_source_comment",
194 "analogue_source_comment",
195 "pcm_source_comment",
198 static const char * dsd_history_comment[] = {
206 static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
208 AVIOContext *pb = s->pb;
210 while (avio_tell(pb) + 12 <= eof) {
211 uint32_t tag = avio_rl32(pb);
212 uint64_t size = avio_rb64(pb);
213 uint64_t orig_pos = avio_tell(pb);
214 const char * metadata_tag = NULL;
217 case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
218 case MKTAG('D','I','T','I'): metadata_tag = "title"; break;
221 if (metadata_tag && size > 4) {
222 unsigned int tag_size = avio_rb32(pb);
223 int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4));
225 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
230 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
236 static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
238 AVIOContext *pb = s->pb;
240 int hour, min, sec, i, ret, config;
242 ID3v2ExtraMeta *id3v2_extra_meta;
244 while (avio_tell(pb) + 12 <= eof) {
245 uint32_t tag = avio_rl32(pb);
246 uint64_t size = avio_rb64(pb);
247 uint64_t orig_pos = avio_tell(pb);
250 case MKTAG('A','B','S','S'):
252 return AVERROR_INVALIDDATA;
253 hour = avio_rb16(pb);
256 snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb));
257 av_dict_set(&st->metadata, "absolute_start_time", abss, 0);
260 case MKTAG('C','H','N','L'):
262 return AVERROR_INVALIDDATA;
263 st->codec->channels = avio_rb16(pb);
264 if (size < 2 + st->codec->channels * 4)
265 return AVERROR_INVALIDDATA;
266 st->codec->channel_layout = 0;
267 if (st->codec->channels > FF_ARRAY_ELEMS(dsd_layout)) {
268 avpriv_request_sample(s, "channel layout");
271 for (i = 0; i < st->codec->channels; i++)
272 dsd_layout[i] = avio_rl32(pb);
273 for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) {
274 const DSDLayoutDesc * d = &dsd_channel_layout[i];
275 if (av_get_channel_layout_nb_channels(d->layout) == st->codec->channels &&
276 !memcmp(d->dsd_layout, dsd_layout, st->codec->channels * sizeof(uint32_t))) {
277 st->codec->channel_layout = d->layout;
283 case MKTAG('C','M','P','R'):
285 return AVERROR_INVALIDDATA;
286 st->codec->codec_id = ff_codec_get_id(dsd_codec_tags, avio_rl32(pb));
289 case MKTAG('F','S',' ',' '):
291 return AVERROR_INVALIDDATA;
292 st->codec->sample_rate = avio_rb32(pb) / 8;
295 case MKTAG('I','D','3',' '):
296 id3v2_extra_meta = NULL;
297 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
298 if (id3v2_extra_meta) {
299 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) {
300 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
303 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
306 if (size < avio_tell(pb) - orig_pos) {
307 av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
308 return AVERROR_INVALIDDATA;
312 case MKTAG('L','S','C','O'):
314 return AVERROR_INVALIDDATA;
315 config = avio_rb16(pb);
316 if (config != 0xFFFF) {
317 if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config))
318 st->codec->channel_layout = dsd_loudspeaker_config[config];
319 if (!st->codec->channel_layout)
320 avpriv_request_sample(s, "loudspeaker configuration %d", config);
325 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
331 static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
332 static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
333 static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
334 static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
335 static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
337 static int iff_read_header(AVFormatContext *s)
339 IffDemuxContext *iff = s->priv_data;
340 AVIOContext *pb = s->pb;
345 uint32_t screenmode = 0, num, den;
346 unsigned transparency = 0;
347 unsigned masking = 0; // no mask
351 st = avformat_new_stream(s, NULL);
353 return AVERROR(ENOMEM);
355 st->codec->channels = 1;
356 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
357 iff->is_64bit = avio_rl32(pb) == ID_FRM8;
358 avio_skip(pb, iff->is_64bit ? 8 : 4);
359 // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
360 st->codec->codec_tag = avio_rl32(pb);
361 iff->bitmap_compression = -1;
362 iff->svx8_compression = -1;
364 iff->maud_compression = -1;
366 while(!url_feof(pb)) {
369 const char *metadata_tag = NULL;
370 int version, nb_comments, i;
371 chunk_id = avio_rl32(pb);
372 data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
373 orig_pos = avio_tell(pb);
377 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
380 return AVERROR_INVALIDDATA;
382 st->codec->sample_rate = avio_rb16(pb);
383 if (data_size >= 16) {
385 iff->svx8_compression = avio_r8(pb);
390 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
393 return AVERROR_INVALIDDATA;
395 iff->maud_bits = avio_rb16(pb);
400 return AVERROR_INVALIDDATA;
402 st->codec->sample_rate = num / den;
403 st->codec->channels = avio_rb16(pb);
404 iff->maud_compression = avio_rb16(pb);
405 if (st->codec->channels == 1)
406 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
407 else if (st->codec->channels == 2)
408 st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
416 iff->body_pos = avio_tell(pb);
417 iff->body_end = iff->body_pos + data_size;
418 iff->body_size = data_size;
423 return AVERROR_INVALIDDATA;
424 if (avio_rb32(pb) < 6) {
425 st->codec->channels = 1;
426 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
428 st->codec->channels = 2;
429 st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
435 return AVERROR_INVALIDDATA;
436 screenmode = avio_rb32(pb);
440 if (data_size < 3 || data_size > 768 || data_size % 3) {
441 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
443 return AVERROR_INVALIDDATA;
445 st->codec->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE;
446 st->codec->extradata = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
447 if (!st->codec->extradata)
448 return AVERROR(ENOMEM);
449 if (avio_read(pb, st->codec->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
454 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
456 return AVERROR_INVALIDDATA;
457 st->codec->width = avio_rb16(pb);
458 st->codec->height = avio_rb16(pb);
459 avio_skip(pb, 4); // x, y offset
460 st->codec->bits_per_coded_sample = avio_r8(pb);
462 masking = avio_r8(pb);
464 iff->bitmap_compression = avio_r8(pb);
465 if (data_size >= 14) {
466 avio_skip(pb, 1); // padding
467 transparency = avio_rb16(pb);
469 if (data_size >= 16) {
470 st->sample_aspect_ratio.num = avio_r8(pb);
471 st->sample_aspect_ratio.den = avio_r8(pb);
476 if (data_size < 4 || (data_size & 3))
477 return AVERROR_INVALIDDATA;
478 if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
480 if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
481 st->codec->pix_fmt = AV_PIX_FMT_RGB24;
482 else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
483 st->codec->pix_fmt = AV_PIX_FMT_RGBA;
484 else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
485 st->codec->pix_fmt = AV_PIX_FMT_BGRA;
486 else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
487 st->codec->pix_fmt = AV_PIX_FMT_ARGB;
488 else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
489 st->codec->pix_fmt = AV_PIX_FMT_ABGR;
491 avpriv_request_sample(s, "color format %.16s", fmt);
492 return AVERROR_PATCHWELCOME;
497 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
499 return AVERROR_INVALIDDATA;
500 st->codec->width = avio_rb16(pb);
501 st->codec->height = avio_rb16(pb);
502 iff->bitmap_compression = avio_rb16(pb);
503 st->sample_aspect_ratio.num = avio_r8(pb);
504 st->sample_aspect_ratio.den = avio_r8(pb);
505 st->codec->bits_per_coded_sample = 24;
510 return AVERROR_INVALIDDATA;
511 st->codec->width = avio_rb16(pb);
512 st->codec->height = avio_rb16(pb);
516 if (data_size < sizeof(iff->tvdc))
517 return AVERROR_INVALIDDATA;
518 res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
524 case ID_TEXT: metadata_tag = "comment"; break;
525 case ID_AUTH: metadata_tag = "artist"; break;
526 case ID_COPYRIGHT: metadata_tag = "copyright"; break;
527 case ID_NAME: metadata_tag = "title"; break;
531 case MKTAG('F','V','E','R'):
533 return AVERROR_INVALIDDATA;
534 version = avio_rb32(pb);
535 av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
536 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
539 case MKTAG('D','I','I','N'):
540 res = parse_dsd_diin(s, st, orig_pos + data_size);
545 case MKTAG('P','R','O','P'):
547 return AVERROR_INVALIDDATA;
548 if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
549 avpriv_request_sample(s, "unknown property type");
552 res = parse_dsd_prop(s, st, orig_pos + data_size);
557 case MKTAG('C','O','M','T'):
559 return AVERROR_INVALIDDATA;
560 nb_comments = avio_rb16(pb);
561 for (i = 0; i < nb_comments; i++) {
562 int year, mon, day, hour, min, type, ref;
567 year = avio_rb16(pb);
572 snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
573 av_dict_set(&st->metadata, "comment_time", tmp, 0);
575 type = avio_rb16(pb);
580 tag = "channel_comment";
582 snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
587 tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_history_comment[ref] : "source_comment";
590 tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
596 metadata_size = avio_rb32(pb);
597 if ((res = get_metadata(s, tag, metadata_size)) < 0) {
598 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
602 if (metadata_size & 1)
609 if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
610 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
614 avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
617 avio_seek(pb, iff->body_pos, SEEK_SET);
619 switch(st->codec->codec_type) {
620 case AVMEDIA_TYPE_AUDIO:
621 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
623 if (st->codec->codec_tag == ID_16SV)
624 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
625 else if (st->codec->codec_tag == ID_MAUD) {
626 if (iff->maud_bits == 8 && !iff->maud_compression) {
627 st->codec->codec_id = AV_CODEC_ID_PCM_U8;
628 } else if (iff->maud_bits == 16 && !iff->maud_compression) {
629 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
630 } else if (iff->maud_bits == 8 && iff->maud_compression == 2) {
631 st->codec->codec_id = AV_CODEC_ID_PCM_ALAW;
632 } else if (iff->maud_bits == 8 && iff->maud_compression == 3) {
633 st->codec->codec_id = AV_CODEC_ID_PCM_MULAW;
635 avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
636 return AVERROR_PATCHWELCOME;
638 } else if (st->codec->codec_tag != ID_DSD) {
639 switch (iff->svx8_compression) {
641 st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
644 st->codec->codec_id = AV_CODEC_ID_8SVX_FIB;
647 st->codec->codec_id = AV_CODEC_ID_8SVX_EXP;
650 av_log(s, AV_LOG_ERROR,
651 "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
656 st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
657 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
658 st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
661 case AVMEDIA_TYPE_VIDEO:
662 iff->bpp = st->codec->bits_per_coded_sample;
663 if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
664 iff->ham = iff->bpp > 6 ? 6 : 4;
665 st->codec->bits_per_coded_sample = 24;
667 iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
668 iff->masking = masking;
669 iff->transparency = transparency;
671 if (!st->codec->extradata) {
672 st->codec->extradata_size = IFF_EXTRA_VIDEO_SIZE;
673 st->codec->extradata = av_malloc(IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
674 if (!st->codec->extradata)
675 return AVERROR(ENOMEM);
677 av_assert0(st->codec->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
678 buf = st->codec->extradata;
679 bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
680 bytestream_put_byte(&buf, iff->bitmap_compression);
681 bytestream_put_byte(&buf, iff->bpp);
682 bytestream_put_byte(&buf, iff->ham);
683 bytestream_put_byte(&buf, iff->flags);
684 bytestream_put_be16(&buf, iff->transparency);
685 bytestream_put_byte(&buf, iff->masking);
686 bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
687 st->codec->codec_id = AV_CODEC_ID_IFF_ILBM;
696 static int iff_read_packet(AVFormatContext *s,
699 IffDemuxContext *iff = s->priv_data;
700 AVIOContext *pb = s->pb;
701 AVStream *st = s->streams[0];
703 int64_t pos = avio_tell(pb);
705 if (pos >= iff->body_end)
708 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
709 if (st->codec->codec_tag == ID_DSD || st->codec->codec_tag == ID_MAUD) {
710 ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codec->block_align));
712 ret = av_get_packet(pb, pkt, iff->body_size);
714 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
717 if (av_new_packet(pkt, iff->body_size + 2) < 0) {
718 return AVERROR(ENOMEM);
722 bytestream_put_be16(&buf, 2);
723 ret = avio_read(pb, buf, iff->body_size);
726 } else if (ret < iff->body_size)
727 av_shrink_packet(pkt, ret + 2);
732 if (pos == iff->body_pos)
733 pkt->flags |= AV_PKT_FLAG_KEY;
736 pkt->stream_index = 0;
740 AVInputFormat ff_iff_demuxer = {
742 .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
743 .priv_data_size = sizeof(IffDemuxContext),
744 .read_probe = iff_probe,
745 .read_header = iff_read_header,
746 .read_packet = iff_read_packet,
747 .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,