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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavformat / iff.c
CommitLineData
2ba45a60
DM		 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_ANIM MKTAG('A','N','I','M')
63
64#define ID_FORM MKTAG('F','O','R','M')
65#define ID_FRM8 MKTAG('F','R','M','8')
66#define ID_ANNO MKTAG('A','N','N','O')
67#define ID_AUTH MKTAG('A','U','T','H')
68#define ID_CHRS MKTAG('C','H','R','S')
69#define ID_COPYRIGHT MKTAG('(','c',')',' ')
70#define ID_CSET MKTAG('C','S','E','T')
71#define ID_FVER MKTAG('F','V','E','R')
72#define ID_NAME MKTAG('N','A','M','E')
73#define ID_TEXT MKTAG('T','E','X','T')
74#define ID_ABIT MKTAG('A','B','I','T')
75#define ID_BODY MKTAG('B','O','D','Y')
76#define ID_DBOD MKTAG('D','B','O','D')
77#define ID_DPEL MKTAG('D','P','E','L')
78#define ID_DLOC MKTAG('D','L','O','C')
79#define ID_TVDC MKTAG('T','V','D','C')
80
81#define LEFT 2
82#define RIGHT 4
83#define STEREO 6
84
85/**
86 * This number of bytes if added at the beginning of each AVPacket
87 * which contain additional information about video properties
88 * which has to be shared between demuxer and decoder.
89 * This number may change between frames, e.g. the demuxer might
90 * set it to smallest possible size of 2 to indicate that there's
91 * no extradata changing in this frame.
92 */
93#define IFF_EXTRA_VIDEO_SIZE 41
94
95typedef enum {
96 COMP_NONE,
97 COMP_FIB,
98 COMP_EXP
99} svx8_compression_type;
100
101typedef struct {
102 int is_64bit; ///< chunk size is 64-bit
103 int64_t body_pos;
104 int64_t body_end;
105 uint32_t body_size;
106 svx8_compression_type svx8_compression;
107 unsigned maud_bits;
108 unsigned maud_compression;
109 unsigned bitmap_compression; ///< delta compression method used
110 unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
111 unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
112 unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
113 unsigned transparency; ///< transparency color index in palette
114 unsigned masking; ///< masking method used
115 uint8_t tvdc[32]; ///< TVDC lookup table
116} IffDemuxContext;
117
118/* Metadata string read */
119static int get_metadata(AVFormatContext *s,
120 const char *const tag,
121 const unsigned data_size)
122{
123 uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
124
125 if (!buf)
126 return AVERROR(ENOMEM);
127
128 if (avio_read(s->pb, buf, data_size) != data_size) {
129 av_free(buf);
130 return AVERROR(EIO);
131 }
132 buf[data_size] = 0;
133 av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
134 return 0;
135}
136
137static int iff_probe(AVProbeData *p)
138{
139 const uint8_t *d = p->buf;
140
141 if ( (AV_RL32(d) == ID_FORM &&
142 (AV_RL32(d+8) == ID_8SVX ||
143 AV_RL32(d+8) == ID_16SV ||
144 AV_RL32(d+8) == ID_MAUD ||
145 AV_RL32(d+8) == ID_PBM ||
146 AV_RL32(d+8) == ID_ACBM ||
147 AV_RL32(d+8) == ID_DEEP ||
148 AV_RL32(d+8) == ID_ILBM ||
149 AV_RL32(d+8) == ID_RGB8 ||
150 AV_RL32(d+8) == ID_RGB8 ||
151 AV_RL32(d+8) == ID_ANIM ||
152 AV_RL32(d+8) == ID_RGBN)) ||
153 (AV_RL32(d) == ID_FRM8 && AV_RL32(d+12) == ID_DSD))
154 return AVPROBE_SCORE_MAX;
155 return 0;
156}
157
158static const AVCodecTag dsd_codec_tags[] = {
159 { AV_CODEC_ID_DSD_MSBF, ID_DSD },
160 { AV_CODEC_ID_NONE, 0 },
161};
162
163
164#define DSD_SLFT MKTAG('S','L','F','T')
165#define DSD_SRGT MKTAG('S','R','G','T')
166#define DSD_MLFT MKTAG('M','L','F','T')
167#define DSD_MRGT MKTAG('M','R','G','T')
168#define DSD_C MKTAG('C',' ',' ',' ')
169#define DSD_LS MKTAG('L','S',' ',' ')
170#define DSD_RS MKTAG('R','S',' ',' ')
171#define DSD_LFE MKTAG('L','F','E',' ')
172
173static const uint32_t dsd_stereo[] = { DSD_SLFT, DSD_SRGT };
174static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS };
175static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS };
176
177typedef struct {
178 uint64_t layout;
179 const uint32_t * dsd_layout;
180} DSDLayoutDesc;
181
182static const DSDLayoutDesc dsd_channel_layout[] = {
183 { AV_CH_LAYOUT_STEREO, dsd_stereo },
184 { AV_CH_LAYOUT_5POINT0, dsd_5point0 },
185 { AV_CH_LAYOUT_5POINT1, dsd_5point1 },
186};
187
188static const uint64_t dsd_loudspeaker_config[] = {
189 AV_CH_LAYOUT_STEREO,
190 0, 0,
191 AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1,
192};
193
194static const char * dsd_source_comment[] = {
195 "dsd_source_comment",
196 "analogue_source_comment",
197 "pcm_source_comment",
198};
199
200static const char * dsd_history_comment[] = {
201 "general_remark",
202 "operator_name",
203 "creating_machine",
204 "timezone",
205 "file_revision"
206};
207
208static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
209{
210 AVIOContext *pb = s->pb;
211
212 while (avio_tell(pb) + 12 <= eof) {
213 uint32_t tag = avio_rl32(pb);
214 uint64_t size = avio_rb64(pb);
215 uint64_t orig_pos = avio_tell(pb);
216 const char * metadata_tag = NULL;
217
218 switch(tag) {
219 case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
220 case MKTAG('D','I','T','I'): metadata_tag = "title"; break;
221 }
222
223 if (metadata_tag && size > 4) {
224 unsigned int tag_size = avio_rb32(pb);
225 int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4));
226 if (ret < 0) {
227 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
228 return ret;
229 }
230 }
231
232 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
233 }
234
235 return 0;
236}
237
238static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
239{
240 AVIOContext *pb = s->pb;
241 char abss[24];
242 int hour, min, sec, i, ret, config;
243 int dsd_layout[6];
244 ID3v2ExtraMeta *id3v2_extra_meta;
245
246 while (avio_tell(pb) + 12 <= eof) {
247 uint32_t tag = avio_rl32(pb);
248 uint64_t size = avio_rb64(pb);
249 uint64_t orig_pos = avio_tell(pb);
250
251 switch(tag) {
252 case MKTAG('A','B','S','S'):
253 if (size < 8)
254 return AVERROR_INVALIDDATA;
255 hour = avio_rb16(pb);
256 min = avio_r8(pb);
257 sec = avio_r8(pb);
258 snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb));
259 av_dict_set(&st->metadata, "absolute_start_time", abss, 0);
260 break;
261
262 case MKTAG('C','H','N','L'):
263 if (size < 2)
264 return AVERROR_INVALIDDATA;
265 st->codec->channels = avio_rb16(pb);
266 if (size < 2 + st->codec->channels * 4)
267 return AVERROR_INVALIDDATA;
268 st->codec->channel_layout = 0;
269 if (st->codec->channels > FF_ARRAY_ELEMS(dsd_layout)) {
270 avpriv_request_sample(s, "channel layout");
271 break;
272 }
273 for (i = 0; i < st->codec->channels; i++)
274 dsd_layout[i] = avio_rl32(pb);
275 for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) {
276 const DSDLayoutDesc * d = &dsd_channel_layout[i];
277 if (av_get_channel_layout_nb_channels(d->layout) == st->codec->channels &&
278 !memcmp(d->dsd_layout, dsd_layout, st->codec->channels * sizeof(uint32_t))) {
279 st->codec->channel_layout = d->layout;
280 break;
281 }
282 }
283 break;
284
285 case MKTAG('C','M','P','R'):
286 if (size < 4)
287 return AVERROR_INVALIDDATA;
288 st->codec->codec_id = ff_codec_get_id(dsd_codec_tags, avio_rl32(pb));
289 break;
290
291 case MKTAG('F','S',' ',' '):
292 if (size < 4)
293 return AVERROR_INVALIDDATA;
294 st->codec->sample_rate = avio_rb32(pb) / 8;
295 break;
296
297 case MKTAG('I','D','3',' '):
298 id3v2_extra_meta = NULL;
299 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
300 if (id3v2_extra_meta) {
301 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) {
302 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
303 return ret;
304 }
305 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
306 }
307
308 if (size < avio_tell(pb) - orig_pos) {
309 av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
310 return AVERROR_INVALIDDATA;
311 }
312 break;
313
314 case MKTAG('L','S','C','O'):
315 if (size < 2)
316 return AVERROR_INVALIDDATA;
317 config = avio_rb16(pb);
318 if (config != 0xFFFF) {
319 if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config))
320 st->codec->channel_layout = dsd_loudspeaker_config[config];
321 if (!st->codec->channel_layout)
322 avpriv_request_sample(s, "loudspeaker configuration %d", config);
323 }
324 break;
325 }
326
327 avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
328 }
329
330 return 0;
331}
332
333static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
334static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
335static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
336static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
337static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
338
339static int iff_read_header(AVFormatContext *s)
340{
341 IffDemuxContext *iff = s->priv_data;
342 AVIOContext *pb = s->pb;
343 AVStream *st;
344 uint8_t *buf;
345 uint32_t chunk_id;
346 uint64_t data_size;
347 uint32_t screenmode = 0, num, den;
348 unsigned transparency = 0;
349 unsigned masking = 0; // no mask
350 uint8_t fmt[16];
351 int fmt_size;
352
353 st = avformat_new_stream(s, NULL);
354 if (!st)
355 return AVERROR(ENOMEM);
356
357 st->codec->channels = 1;
358 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
359 iff->is_64bit = avio_rl32(pb) == ID_FRM8;
360 avio_skip(pb, iff->is_64bit ? 8 : 4);
361 // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
362 st->codec->codec_tag = avio_rl32(pb);
363 if (st->codec->codec_tag == ID_ANIM) {
364 avio_skip(pb, 8);
365 st->codec->codec_tag = avio_rl32(pb);
366 }
367 iff->bitmap_compression = -1;
368 iff->svx8_compression = -1;
369 iff->maud_bits = -1;
370 iff->maud_compression = -1;
371
372 while(!avio_feof(pb)) {
373 uint64_t orig_pos;
374 int res;
375 const char *metadata_tag = NULL;
376 int version, nb_comments, i;
377 chunk_id = avio_rl32(pb);
378 data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
379 orig_pos = avio_tell(pb);
380
381 switch(chunk_id) {
382 case ID_VHDR:
383 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
384
385 if (data_size < 14)
386 return AVERROR_INVALIDDATA;
387 avio_skip(pb, 12);
388 st->codec->sample_rate = avio_rb16(pb);
389 if (data_size >= 16) {
390 avio_skip(pb, 1);
391 iff->svx8_compression = avio_r8(pb);
392 }
393 break;
394
395 case ID_MHDR:
396 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
397
398 if (data_size < 32)
399 return AVERROR_INVALIDDATA;
400 avio_skip(pb, 4);
401 iff->maud_bits = avio_rb16(pb);
402 avio_skip(pb, 2);
403 num = avio_rb32(pb);
404 den = avio_rb16(pb);
405 if (!den)
406 return AVERROR_INVALIDDATA;
407 avio_skip(pb, 2);
408 st->codec->sample_rate = num / den;
409 st->codec->channels = avio_rb16(pb);
410 iff->maud_compression = avio_rb16(pb);
411 if (st->codec->channels == 1)
412 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
413 else if (st->codec->channels == 2)
414 st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
415 break;
416
417 case ID_ABIT:
418 case ID_BODY:
419 case ID_DBOD:
420 case ID_DSD:
421 case ID_MDAT:
422 iff->body_pos = avio_tell(pb);
423 iff->body_end = iff->body_pos + data_size;
424 iff->body_size = data_size;
425 break;
426
427 case ID_CHAN:
428 if (data_size < 4)
429 return AVERROR_INVALIDDATA;
430 if (avio_rb32(pb) < 6) {
431 st->codec->channels = 1;
432 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
433 } else {
434 st->codec->channels = 2;
435 st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
436 }
437 break;
438
439 case ID_CAMG:
440 if (data_size < 4)
441 return AVERROR_INVALIDDATA;
442 screenmode = avio_rb32(pb);
443 break;
444
445 case ID_CMAP:
446 if (data_size < 3 || data_size > 768 || data_size % 3) {
447 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
448 data_size);
449 return AVERROR_INVALIDDATA;
450 }
451 st->codec->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE;
452 st->codec->extradata = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
453 if (!st->codec->extradata)
454 return AVERROR(ENOMEM);
455 if (avio_read(pb, st->codec->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
456 return AVERROR(EIO);
457 break;
458
459 case ID_BMHD:
460 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
461 if (data_size <= 8)
462 return AVERROR_INVALIDDATA;
463 st->codec->width = avio_rb16(pb);
464 st->codec->height = avio_rb16(pb);
465 avio_skip(pb, 4); // x, y offset
466 st->codec->bits_per_coded_sample = avio_r8(pb);
467 if (data_size >= 10)
468 masking = avio_r8(pb);
469 if (data_size >= 11)
470 iff->bitmap_compression = avio_r8(pb);
471 if (data_size >= 14) {
472 avio_skip(pb, 1); // padding
473 transparency = avio_rb16(pb);
474 }
475 if (data_size >= 16) {
476 st->sample_aspect_ratio.num = avio_r8(pb);
477 st->sample_aspect_ratio.den = avio_r8(pb);
478 }
479 break;
480
481 case ID_DPEL:
482 if (data_size < 4 || (data_size & 3))
483 return AVERROR_INVALIDDATA;
484 if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
485 return fmt_size;
486 if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
487 st->codec->pix_fmt = AV_PIX_FMT_RGB24;
488 else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
489 st->codec->pix_fmt = AV_PIX_FMT_RGBA;
490 else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
491 st->codec->pix_fmt = AV_PIX_FMT_BGRA;
492 else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
493 st->codec->pix_fmt = AV_PIX_FMT_ARGB;
494 else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
495 st->codec->pix_fmt = AV_PIX_FMT_ABGR;
496 else {
497 avpriv_request_sample(s, "color format %.16s", fmt);
498 return AVERROR_PATCHWELCOME;
499 }
500 break;
501
502 case ID_DGBL:
503 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
504 if (data_size < 8)
505 return AVERROR_INVALIDDATA;
506 st->codec->width = avio_rb16(pb);
507 st->codec->height = avio_rb16(pb);
508 iff->bitmap_compression = avio_rb16(pb);
509 st->sample_aspect_ratio.num = avio_r8(pb);
510 st->sample_aspect_ratio.den = avio_r8(pb);
511 st->codec->bits_per_coded_sample = 24;
512 break;
513
514 case ID_DLOC:
515 if (data_size < 4)
516 return AVERROR_INVALIDDATA;
517 st->codec->width = avio_rb16(pb);
518 st->codec->height = avio_rb16(pb);
519 break;
520
521 case ID_TVDC:
522 if (data_size < sizeof(iff->tvdc))
523 return AVERROR_INVALIDDATA;
524 res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
525 if (res < 0)
526 return res;
527 break;
528
529 case ID_ANNO:
530 case ID_TEXT: metadata_tag = "comment"; break;
531 case ID_AUTH: metadata_tag = "artist"; break;
532 case ID_COPYRIGHT: metadata_tag = "copyright"; break;
533 case ID_NAME: metadata_tag = "title"; break;
534
535 /* DSD tags */
536
537 case MKTAG('F','V','E','R'):
538 if (data_size < 4)
539 return AVERROR_INVALIDDATA;
540 version = avio_rb32(pb);
541 av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
542 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
543 break;
544
545 case MKTAG('D','I','I','N'):
546 res = parse_dsd_diin(s, st, orig_pos + data_size);
547 if (res < 0)
548 return res;
549 break;
550
551 case MKTAG('P','R','O','P'):
552 if (data_size < 4)
553 return AVERROR_INVALIDDATA;
554 if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
555 avpriv_request_sample(s, "unknown property type");
556 break;
557 }
558 res = parse_dsd_prop(s, st, orig_pos + data_size);
559 if (res < 0)
560 return res;
561 break;
562
563 case MKTAG('C','O','M','T'):
564 if (data_size < 2)
565 return AVERROR_INVALIDDATA;
566 nb_comments = avio_rb16(pb);
567 for (i = 0; i < nb_comments; i++) {
568 int year, mon, day, hour, min, type, ref;
569 char tmp[24];
570 const char *tag;
571 int metadata_size;
572
573 year = avio_rb16(pb);
574 mon = avio_r8(pb);
575 day = avio_r8(pb);
576 hour = avio_r8(pb);
577 min = avio_r8(pb);
578 snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
579 av_dict_set(&st->metadata, "comment_time", tmp, 0);
580
581 type = avio_rb16(pb);
582 ref = avio_rb16(pb);
583 switch (type) {
584 case 1:
585 if (!i)
586 tag = "channel_comment";
587 else {
588 snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
589 tag = tmp;
590 }
591 break;
592 case 2:
593 tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
594 break;
595 case 3:
596 tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
597 break;
598 default:
599 tag = "comment";
600 }
601
602 metadata_size = avio_rb32(pb);
603 if ((res = get_metadata(s, tag, metadata_size)) < 0) {
604 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
605 return res;
606 }
607
608 if (metadata_size & 1)
609 avio_skip(pb, 1);
610 }
611 break;
612 }
613
614 if (metadata_tag) {
615 if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
616 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
617 return res;
618 }
619 }
620 avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
621 }
622
623 avio_seek(pb, iff->body_pos, SEEK_SET);
624
625 switch(st->codec->codec_type) {
626 case AVMEDIA_TYPE_AUDIO:
627 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
628
629 if (st->codec->codec_tag == ID_16SV)
630 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
631 else if (st->codec->codec_tag == ID_MAUD) {
632 if (iff->maud_bits == 8 && !iff->maud_compression) {
633 st->codec->codec_id = AV_CODEC_ID_PCM_U8;
634 } else if (iff->maud_bits == 16 && !iff->maud_compression) {
635 st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
636 } else if (iff->maud_bits == 8 && iff->maud_compression == 2) {
637 st->codec->codec_id = AV_CODEC_ID_PCM_ALAW;
638 } else if (iff->maud_bits == 8 && iff->maud_compression == 3) {
639 st->codec->codec_id = AV_CODEC_ID_PCM_MULAW;
640 } else {
641 avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
642 return AVERROR_PATCHWELCOME;
643 }
644 } else if (st->codec->codec_tag != ID_DSD) {
645 switch (iff->svx8_compression) {
646 case COMP_NONE:
647 st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
648 break;
649 case COMP_FIB:
650 st->codec->codec_id = AV_CODEC_ID_8SVX_FIB;
651 break;
652 case COMP_EXP:
653 st->codec->codec_id = AV_CODEC_ID_8SVX_EXP;
654 break;
655 default:
656 av_log(s, AV_LOG_ERROR,
657 "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
658 return -1;
659 }
660 }
661
662 st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
663 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
664 st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
665 break;
666
667 case AVMEDIA_TYPE_VIDEO:
668 iff->bpp = st->codec->bits_per_coded_sample;
669 if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
670 iff->ham = iff->bpp > 6 ? 6 : 4;
671 st->codec->bits_per_coded_sample = 24;
672 }
673 iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
674 iff->masking = masking;
675 iff->transparency = transparency;
676
677 if (!st->codec->extradata) {
678 st->codec->extradata_size = IFF_EXTRA_VIDEO_SIZE;
679 st->codec->extradata = av_malloc(IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
680 if (!st->codec->extradata)
681 return AVERROR(ENOMEM);
682 }
683 av_assert0(st->codec->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
684 buf = st->codec->extradata;
685 bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
686 bytestream_put_byte(&buf, iff->bitmap_compression);
687 bytestream_put_byte(&buf, iff->bpp);
688 bytestream_put_byte(&buf, iff->ham);
689 bytestream_put_byte(&buf, iff->flags);
690 bytestream_put_be16(&buf, iff->transparency);
691 bytestream_put_byte(&buf, iff->masking);
692 bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
693 st->codec->codec_id = AV_CODEC_ID_IFF_ILBM;
694 break;
695 default:
696 return -1;
697 }
698
699 return 0;
700}
701
702static int iff_read_packet(AVFormatContext *s,
703 AVPacket *pkt)
704{
705 IffDemuxContext *iff = s->priv_data;
706 AVIOContext *pb = s->pb;
707 AVStream *st = s->streams[0];
708 int ret;
709 int64_t pos = avio_tell(pb);
710
711 if (pos >= iff->body_end)
712 return AVERROR_EOF;
713
714 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
715 if (st->codec->codec_tag == ID_DSD || st->codec->codec_tag == ID_MAUD) {
716 ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codec->block_align));
717 } else {
718 ret = av_get_packet(pb, pkt, iff->body_size);
719 }
720 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
721 uint8_t *buf;
722
723 if (av_new_packet(pkt, iff->body_size + 2) < 0) {
724 return AVERROR(ENOMEM);
725 }
726
727 buf = pkt->data;
728 bytestream_put_be16(&buf, 2);
729 ret = avio_read(pb, buf, iff->body_size);
730 if (ret<0) {
731 av_free_packet(pkt);
732 } else if (ret < iff->body_size)
733 av_shrink_packet(pkt, ret + 2);
734 } else {
735 av_assert0(0);
736 }
737
738 if (pos == iff->body_pos)
739 pkt->flags |= AV_PKT_FLAG_KEY;
740 if (ret < 0)
741 return ret;
742 pkt->stream_index = 0;
743 return ret;
744}
745
746AVInputFormat ff_iff_demuxer = {
747 .name = "iff",
748 .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
749 .priv_data_size = sizeof(IffDemuxContext),
750 .read_probe = iff_probe,
751 .read_header = iff_read_header,
752 .read_packet = iff_read_packet,
753 .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
754};
ffmpeg Piment Noir Debian package repository