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 */
get_metadata(AVFormatContext * s,const char * const tag,const unsigned data_size)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
iff_probe(const AVProbeData * p)145 static 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
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 AVChannelLayout layout;
187 const uint32_t * dsd_layout;
188 } DSDLayoutDesc;
189
190 static const DSDLayoutDesc dsd_channel_layout[] = {
191 { AV_CHANNEL_LAYOUT_STEREO, dsd_stereo },
192 { AV_CHANNEL_LAYOUT_5POINT0, dsd_5point0 },
193 { AV_CHANNEL_LAYOUT_5POINT1, dsd_5point1 },
194 };
195
196 static const AVChannelLayout dsd_loudspeaker_config[] = {
197 AV_CHANNEL_LAYOUT_STEREO,
198 { 0 }, { 0 },
199 AV_CHANNEL_LAYOUT_5POINT0, AV_CHANNEL_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
parse_dsd_diin(AVFormatContext * s,AVStream * st,uint64_t eof)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
parse_dsd_prop(AVFormatContext * s,AVStream * st,uint64_t eof)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->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
280 st->codecpar->ch_layout.nb_channels = avio_rb16(pb);
281 if (size < 2 + st->codecpar->ch_layout.nb_channels * 4)
282 return AVERROR_INVALIDDATA;
283 if (st->codecpar->ch_layout.nb_channels > FF_ARRAY_ELEMS(dsd_layout)) {
284 avpriv_request_sample(s, "channel layout");
285 break;
286 }
287 for (i = 0; i < st->codecpar->ch_layout.nb_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 (d->layout.nb_channels == st->codecpar->ch_layout.nb_channels &&
292 !memcmp(d->dsd_layout, dsd_layout, d->layout.nb_channels * sizeof(uint32_t))) {
293 st->codecpar->ch_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, "'%s' compression is not supported\n",
306 av_fourcc2str(tag));
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 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
319 if (id3v2_extra_meta) {
320 if ((ret = ff_id3v2_parse_apic(s, id3v2_extra_meta)) < 0 ||
321 (ret = ff_id3v2_parse_chapters(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->ch_layout = dsd_loudspeaker_config[config];
341 if (!st->codecpar->ch_layout.nb_channels)
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
read_dst_frame(AVFormatContext * s,AVPacket * pkt)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 if (s->nb_streams < 1)
362 return AVERROR_INVALIDDATA;
363
364 while (!avio_feof(pb)) {
365 chunk_pos = avio_tell(pb);
366 if (chunk_pos >= iff->body_end)
367 return AVERROR_EOF;
368
369 chunk_id = avio_rl32(pb);
370 data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
371 data_pos = avio_tell(pb);
372
373 if (data_size < 1 || data_size >= INT64_MAX)
374 return AVERROR_INVALIDDATA;
375
376 switch (chunk_id) {
377 case ID_DSTF:
378 if (!pkt) {
379 iff->body_pos = avio_tell(pb) - (iff->is_64bit ? 12 : 8);
380 iff->body_size = iff->body_end - iff->body_pos;
381 return 0;
382 }
383 ret = av_get_packet(pb, pkt, data_size);
384 if (ret < 0)
385 return ret;
386 if (data_size & 1)
387 avio_skip(pb, 1);
388 pkt->flags |= AV_PKT_FLAG_KEY;
389 pkt->stream_index = 0;
390 pkt->duration = s->streams[0]->codecpar->sample_rate / 75;
391 pkt->pos = chunk_pos;
392
393 chunk_pos = avio_tell(pb);
394 if (chunk_pos >= iff->body_end)
395 return 0;
396
397 avio_seek(pb, chunk_pos, SEEK_SET);
398 return 0;
399
400 case ID_FRTE:
401 if (data_size < 4)
402 return AVERROR_INVALIDDATA;
403 s->streams[0]->duration = avio_rb32(pb) * (uint64_t)s->streams[0]->codecpar->sample_rate / 75;
404
405 break;
406 }
407
408 avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1));
409 }
410
411 return ret;
412 }
413
414 static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
415 static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
416 static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
417 static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
418 static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
419
iff_read_header(AVFormatContext * s)420 static int iff_read_header(AVFormatContext *s)
421 {
422 IffDemuxContext *iff = s->priv_data;
423 AVIOContext *pb = s->pb;
424 AVStream *st;
425 uint8_t *buf;
426 uint32_t chunk_id;
427 uint64_t data_size;
428 uint32_t screenmode = 0, num, den;
429 unsigned transparency = 0;
430 unsigned masking = 0; // no mask
431 uint8_t fmt[16];
432 int fmt_size;
433
434 st = avformat_new_stream(s, NULL);
435 if (!st)
436 return AVERROR(ENOMEM);
437
438 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
439 iff->is_64bit = avio_rl32(pb) == ID_FRM8;
440 avio_skip(pb, iff->is_64bit ? 8 : 4);
441 // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
442 st->codecpar->codec_tag = avio_rl32(pb);
443 if (st->codecpar->codec_tag == ID_ANIM) {
444 avio_skip(pb, 12);
445 }
446 iff->bitmap_compression = -1;
447 iff->svx8_compression = -1;
448 iff->maud_bits = -1;
449 iff->maud_compression = -1;
450
451 while(!avio_feof(pb)) {
452 uint64_t orig_pos;
453 int res;
454 const char *metadata_tag = NULL;
455 int version, nb_comments, i;
456 chunk_id = avio_rl32(pb);
457 data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
458 orig_pos = avio_tell(pb);
459
460 if (data_size >= INT64_MAX)
461 return AVERROR_INVALIDDATA;
462
463 switch(chunk_id) {
464 case ID_VHDR:
465 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
466
467 if (data_size < 14)
468 return AVERROR_INVALIDDATA;
469 avio_skip(pb, 12);
470 st->codecpar->sample_rate = avio_rb16(pb);
471 if (data_size >= 16) {
472 avio_skip(pb, 1);
473 iff->svx8_compression = avio_r8(pb);
474 }
475 break;
476
477 case ID_MHDR:
478 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
479
480 if (data_size < 32)
481 return AVERROR_INVALIDDATA;
482 avio_skip(pb, 4);
483 iff->maud_bits = avio_rb16(pb);
484 avio_skip(pb, 2);
485 num = avio_rb32(pb);
486 den = avio_rb16(pb);
487 if (!den)
488 return AVERROR_INVALIDDATA;
489 avio_skip(pb, 2);
490 st->codecpar->sample_rate = num / den;
491 st->codecpar->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
492 st->codecpar->ch_layout.nb_channels = avio_rb16(pb);
493 iff->maud_compression = avio_rb16(pb);
494 if (st->codecpar->ch_layout.nb_channels == 1)
495 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
496 else if (st->codecpar->ch_layout.nb_channels == 2)
497 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
498 break;
499
500 case ID_ABIT:
501 case ID_BODY:
502 case ID_DBOD:
503 case ID_DSD:
504 case ID_DST:
505 case ID_MDAT:
506 iff->body_pos = avio_tell(pb);
507 if (iff->body_pos < 0 || iff->body_pos + data_size > INT64_MAX)
508 return AVERROR_INVALIDDATA;
509
510 iff->body_end = iff->body_pos + data_size;
511 iff->body_size = data_size;
512 if (chunk_id == ID_DST) {
513 int ret = read_dst_frame(s, NULL);
514 if (ret < 0)
515 return ret;
516 }
517 break;
518
519 case ID_CHAN:
520 if (data_size < 4)
521 return AVERROR_INVALIDDATA;
522 if (avio_rb32(pb) < 6) {
523 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
524 } else {
525 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
526 }
527 break;
528
529 case ID_CAMG:
530 if (data_size < 4)
531 return AVERROR_INVALIDDATA;
532 screenmode = avio_rb32(pb);
533 break;
534
535 case ID_CMAP:
536 if (data_size < 3 || data_size > 768 || data_size % 3) {
537 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
538 data_size);
539 return AVERROR_INVALIDDATA;
540 }
541 res = ff_alloc_extradata(st->codecpar,
542 data_size + IFF_EXTRA_VIDEO_SIZE);
543 if (res < 0)
544 return res;
545 if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) {
546 av_freep(&st->codecpar->extradata);
547 st->codecpar->extradata_size = 0;
548 return AVERROR(EIO);
549 }
550 break;
551
552 case ID_BMHD:
553 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
554 if (data_size <= 8)
555 return AVERROR_INVALIDDATA;
556 st->codecpar->width = avio_rb16(pb);
557 st->codecpar->height = avio_rb16(pb);
558 avio_skip(pb, 4); // x, y offset
559 st->codecpar->bits_per_coded_sample = avio_r8(pb);
560 if (data_size >= 10)
561 masking = avio_r8(pb);
562 if (data_size >= 11)
563 iff->bitmap_compression = avio_r8(pb);
564 if (data_size >= 14) {
565 avio_skip(pb, 1); // padding
566 transparency = avio_rb16(pb);
567 }
568 if (data_size >= 16) {
569 st->sample_aspect_ratio.num = avio_r8(pb);
570 st->sample_aspect_ratio.den = avio_r8(pb);
571 }
572 break;
573
574 case ID_ANHD:
575 break;
576
577 case ID_DPAN:
578 avio_skip(pb, 2);
579 st->duration = avio_rb16(pb);
580 break;
581
582 case ID_DPEL:
583 if (data_size < 4 || (data_size & 3))
584 return AVERROR_INVALIDDATA;
585 if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
586 return fmt_size;
587 if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
588 st->codecpar->format = AV_PIX_FMT_RGB24;
589 else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
590 st->codecpar->format = AV_PIX_FMT_RGBA;
591 else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
592 st->codecpar->format = AV_PIX_FMT_BGRA;
593 else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
594 st->codecpar->format = AV_PIX_FMT_ARGB;
595 else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
596 st->codecpar->format = AV_PIX_FMT_ABGR;
597 else {
598 avpriv_request_sample(s, "color format %.16s", fmt);
599 return AVERROR_PATCHWELCOME;
600 }
601 break;
602
603 case ID_DGBL:
604 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
605 if (data_size < 8)
606 return AVERROR_INVALIDDATA;
607 st->codecpar->width = avio_rb16(pb);
608 st->codecpar->height = avio_rb16(pb);
609 iff->bitmap_compression = avio_rb16(pb);
610 st->sample_aspect_ratio.num = avio_r8(pb);
611 st->sample_aspect_ratio.den = avio_r8(pb);
612 st->codecpar->bits_per_coded_sample = 24;
613 break;
614
615 case ID_DLOC:
616 if (data_size < 4)
617 return AVERROR_INVALIDDATA;
618 st->codecpar->width = avio_rb16(pb);
619 st->codecpar->height = avio_rb16(pb);
620 break;
621
622 case ID_TVDC:
623 if (data_size < sizeof(iff->tvdc))
624 return AVERROR_INVALIDDATA;
625 res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
626 if (res < 0)
627 return res;
628 break;
629
630 case ID_ANNO:
631 case ID_TEXT: metadata_tag = "comment"; break;
632 case ID_AUTH: metadata_tag = "artist"; break;
633 case ID_COPYRIGHT: metadata_tag = "copyright"; break;
634 case ID_NAME: metadata_tag = "title"; break;
635
636 /* DSD tags */
637
638 case MKTAG('F','V','E','R'):
639 if (data_size < 4)
640 return AVERROR_INVALIDDATA;
641 version = avio_rb32(pb);
642 av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
643 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
644 break;
645
646 case MKTAG('D','I','I','N'):
647 res = parse_dsd_diin(s, st, orig_pos + data_size);
648 if (res < 0)
649 return res;
650 break;
651
652 case MKTAG('P','R','O','P'):
653 if (data_size < 4)
654 return AVERROR_INVALIDDATA;
655 if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
656 avpriv_request_sample(s, "unknown property type");
657 break;
658 }
659 res = parse_dsd_prop(s, st, orig_pos + data_size);
660 if (res < 0)
661 return res;
662 break;
663
664 case MKTAG('C','O','M','T'):
665 if (data_size < 2)
666 return AVERROR_INVALIDDATA;
667 nb_comments = avio_rb16(pb);
668 for (i = 0; i < nb_comments; i++) {
669 int year, mon, day, hour, min, type, ref;
670 char tmp[24];
671 const char *tag;
672 int metadata_size;
673
674 year = avio_rb16(pb);
675 mon = avio_r8(pb);
676 day = avio_r8(pb);
677 hour = avio_r8(pb);
678 min = avio_r8(pb);
679 snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
680 av_dict_set(&st->metadata, "comment_time", tmp, 0);
681
682 type = avio_rb16(pb);
683 ref = avio_rb16(pb);
684 switch (type) {
685 case 1:
686 if (!i)
687 tag = "channel_comment";
688 else {
689 snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
690 tag = tmp;
691 }
692 break;
693 case 2:
694 tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
695 break;
696 case 3:
697 tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
698 break;
699 default:
700 tag = "comment";
701 }
702
703 metadata_size = avio_rb32(pb);
704 if ((res = get_metadata(s, tag, metadata_size)) < 0) {
705 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
706 return res;
707 }
708
709 if (metadata_size & 1)
710 avio_skip(pb, 1);
711 }
712 break;
713 }
714
715 if (metadata_tag) {
716 if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
717 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
718 return res;
719 }
720 }
721 avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
722 }
723
724 if (st->codecpar->codec_tag == ID_ANIM)
725 avio_seek(pb, 12, SEEK_SET);
726 else
727 avio_seek(pb, iff->body_pos, SEEK_SET);
728
729 switch(st->codecpar->codec_type) {
730 case AVMEDIA_TYPE_AUDIO:
731 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
732
733 if (st->codecpar->codec_tag == ID_16SV)
734 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
735 else if (st->codecpar->codec_tag == ID_MAUD) {
736 if (iff->maud_bits == 8 && !iff->maud_compression) {
737 st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
738 } else if (iff->maud_bits == 16 && !iff->maud_compression) {
739 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
740 } else if (iff->maud_bits == 8 && iff->maud_compression == 2) {
741 st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW;
742 } else if (iff->maud_bits == 8 && iff->maud_compression == 3) {
743 st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW;
744 } else {
745 avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
746 return AVERROR_PATCHWELCOME;
747 }
748 } else if (st->codecpar->codec_tag != ID_DSD &&
749 st->codecpar->codec_tag != ID_DST) {
750 switch (iff->svx8_compression) {
751 case COMP_NONE:
752 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
753 break;
754 case COMP_FIB:
755 st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB;
756 break;
757 case COMP_EXP:
758 st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP;
759 break;
760 default:
761 av_log(s, AV_LOG_ERROR,
762 "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
763 return -1;
764 }
765 }
766
767 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
768 st->codecpar->bit_rate = (int64_t)st->codecpar->ch_layout.nb_channels *
769 st->codecpar->sample_rate *
770 st->codecpar->bits_per_coded_sample;
771 st->codecpar->block_align = st->codecpar->ch_layout.nb_channels *
772 st->codecpar->bits_per_coded_sample;
773 if ((st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) && st->codecpar->block_align <= 0)
774 return AVERROR_INVALIDDATA;
775 break;
776
777 case AVMEDIA_TYPE_VIDEO:
778 iff->bpp = st->codecpar->bits_per_coded_sample;
779 if (st->codecpar->codec_tag == ID_ANIM)
780 avpriv_set_pts_info(st, 32, 1, 60);
781 if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
782 iff->ham = iff->bpp > 6 ? 6 : 4;
783 st->codecpar->bits_per_coded_sample = 24;
784 }
785 iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
786 iff->masking = masking;
787 iff->transparency = transparency;
788
789 if (!st->codecpar->extradata) {
790 int ret = ff_alloc_extradata(st->codecpar, IFF_EXTRA_VIDEO_SIZE);
791 if (ret < 0)
792 return ret;
793 }
794 av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
795 buf = st->codecpar->extradata;
796 bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
797 bytestream_put_byte(&buf, iff->bitmap_compression);
798 bytestream_put_byte(&buf, iff->bpp);
799 bytestream_put_byte(&buf, iff->ham);
800 bytestream_put_byte(&buf, iff->flags);
801 bytestream_put_be16(&buf, iff->transparency);
802 bytestream_put_byte(&buf, iff->masking);
803 bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
804 st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM;
805 break;
806 default:
807 return -1;
808 }
809
810 return 0;
811 }
812
get_anim_duration(uint8_t * buf,int size)813 static unsigned get_anim_duration(uint8_t *buf, int size)
814 {
815 GetByteContext gb;
816
817 bytestream2_init(&gb, buf, size);
818 bytestream2_skip(&gb, 4);
819 while (bytestream2_get_bytes_left(&gb) > 8) {
820 unsigned chunk = bytestream2_get_le32(&gb);
821 unsigned size = bytestream2_get_be32(&gb);
822
823 if (chunk == ID_ANHD) {
824 if (size < 40)
825 break;
826 bytestream2_skip(&gb, 14);
827 return bytestream2_get_be32(&gb);
828 } else {
829 bytestream2_skip(&gb, size + size & 1);
830 }
831 }
832 return 10;
833 }
834
iff_read_packet(AVFormatContext * s,AVPacket * pkt)835 static int iff_read_packet(AVFormatContext *s,
836 AVPacket *pkt)
837 {
838 IffDemuxContext *iff = s->priv_data;
839 AVIOContext *pb = s->pb;
840 AVStream *st = s->streams[0];
841 int ret;
842 int64_t pos = avio_tell(pb);
843
844 if (avio_feof(pb))
845 return AVERROR_EOF;
846 if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end)
847 return AVERROR_EOF;
848
849 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
850 if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) {
851 ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align));
852 } else if (st->codecpar->codec_tag == ID_DST) {
853 return read_dst_frame(s, pkt);
854 } else {
855 if (iff->body_size > INT_MAX || !iff->body_size)
856 return AVERROR_INVALIDDATA;
857 ret = av_get_packet(pb, pkt, iff->body_size);
858 }
859 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
860 st->codecpar->codec_tag == ID_ANIM) {
861 uint64_t data_size, orig_pos;
862 uint32_t chunk_id, chunk_id2;
863
864 while (!avio_feof(pb)) {
865 if (avio_feof(pb))
866 return AVERROR_EOF;
867
868 orig_pos = avio_tell(pb);
869 chunk_id = avio_rl32(pb);
870 data_size = avio_rb32(pb);
871 chunk_id2 = avio_rl32(pb);
872
873 if (chunk_id == ID_FORM &&
874 chunk_id2 == ID_ILBM) {
875 avio_skip(pb, -4);
876 break;
877 } else if (chunk_id == ID_FORM &&
878 chunk_id2 == ID_ANIM) {
879 continue;
880 } else {
881 avio_skip(pb, data_size);
882 }
883 }
884 ret = av_get_packet(pb, pkt, data_size);
885 pkt->pos = orig_pos;
886 pkt->duration = get_anim_duration(pkt->data, pkt->size);
887 if (pos == 12)
888 pkt->flags |= AV_PKT_FLAG_KEY;
889 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
890 st->codecpar->codec_tag != ID_ANIM) {
891 if (iff->body_size > INT_MAX || !iff->body_size)
892 return AVERROR_INVALIDDATA;
893 ret = av_get_packet(pb, pkt, iff->body_size);
894 pkt->pos = pos;
895 if (pos == iff->body_pos)
896 pkt->flags |= AV_PKT_FLAG_KEY;
897 } else {
898 av_assert0(0);
899 }
900
901 if (ret < 0)
902 return ret;
903 pkt->stream_index = 0;
904 return ret;
905 }
906
907 const AVInputFormat ff_iff_demuxer = {
908 .name = "iff",
909 .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
910 .priv_data_size = sizeof(IffDemuxContext),
911 .read_probe = iff_probe,
912 .read_header = iff_read_header,
913 .read_packet = iff_read_packet,
914 .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
915 };
916