FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/avidec.c
Date: 2025-08-19 23:55:23
Exec Total Coverage
Lines: 863 1201 71.9%
Functions: 21 24 87.5%
Branches: 552 906 60.9%
Line Branch Exec Source
1 /*
2 * AVI demuxer
3 * Copyright (c) 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config_components.h"
23
24 #include <inttypes.h>
25
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/mem.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/integer.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/mathematics.h"
35 #include "avformat.h"
36 #include "avi.h"
37 #include "demux.h"
38 #include "dv.h"
39 #include "internal.h"
40 #include "isom.h"
41 #include "riff.h"
42 #include "libavcodec/bytestream.h"
43 #include "libavcodec/exif.h"
44 #include "libavcodec/startcode.h"
45
46 typedef struct AVIStream {
47 int64_t frame_offset; /* current frame (video) or byte (audio) counter
48 * (used to compute the pts) */
49 int remaining;
50 int packet_size;
51
52 uint32_t handler;
53 uint32_t scale;
54 uint32_t rate;
55 int sample_size; /* size of one sample (or packet)
56 * (in the rate/scale sense) in bytes */
57
58 int64_t cum_len; /* temporary storage (used during seek) */
59 int prefix; /* normally 'd'<<8 + 'c' or 'w'<<8 + 'b' */
60 int prefix_count;
61 uint32_t pal[256];
62 int has_pal;
63 int dshow_block_align; /* block align variable used to emulate bugs in
64 * the MS dshow demuxer */
65
66 AVFormatContext *sub_ctx;
67 AVPacket *sub_pkt;
68 AVBufferRef *sub_buffer;
69
70 int64_t seek_pos;
71 } AVIStream;
72
73 typedef struct AVIContext {
74 const AVClass *class;
75 int64_t riff_end;
76 int64_t movi_end;
77 int64_t fsize;
78 int64_t io_fsize;
79 int64_t movi_list;
80 int64_t last_pkt_pos;
81 int index_loaded;
82 int is_odml;
83 int non_interleaved;
84 int stream_index;
85 DVDemuxContext *dv_demux;
86 int odml_depth;
87 int64_t odml_read;
88 int64_t odml_max_pos;
89 int use_odml;
90 #define MAX_ODML_DEPTH 1000
91 int64_t dts_max;
92 } AVIContext;
93
94
95 static const AVOption options[] = {
96 { "use_odml", "use odml index", offsetof(AVIContext, use_odml), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM},
97 { NULL },
98 };
99
100 static const AVClass demuxer_class = {
101 .class_name = "avi",
102 .item_name = av_default_item_name,
103 .option = options,
104 .version = LIBAVUTIL_VERSION_INT,
105 .category = AV_CLASS_CATEGORY_DEMUXER,
106 };
107
108
109 static const char avi_headers[][8] = {
110 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
111 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
112 { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19 },
113 { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' },
114 { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' },
115 { 0 }
116 };
117
118 static const AVMetadataConv avi_metadata_conv[] = {
119 { "strn", "title" },
120 { "isbj", "subject" },
121 { "inam", "title" },
122 { "iart", "artist" },
123 { "icop", "copyright" },
124 { "icmt", "comment" },
125 { "ignr", "genre" },
126 { "iprd", "product" },
127 { "isft", "software" },
128
129 { 0 },
130 };
131
132 static int avi_load_index(AVFormatContext *s);
133 static int guess_ni_flag(AVFormatContext *s);
134
135 #define print_tag(s, str, tag, size) \
136 av_log(s, AV_LOG_TRACE, "pos:%"PRIX64" %s: tag=%s size=0x%x\n", \
137 avio_tell(pb), str, av_fourcc2str(tag), size) \
138
139 64327 static inline int get_duration(AVIStream *ast, int len)
140 {
141
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 64327 if (ast->sample_size)
142 9460 return len;
143
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 54867 else if (ast->dshow_block_align)
144 212 return (len + (int64_t)ast->dshow_block_align - 1) / ast->dshow_block_align;
145 else
146 54655 return 1;
147 }
148
149 476 static int get_riff(AVFormatContext *s, AVIOContext *pb)
150 {
151 476 AVIContext *avi = s->priv_data;
152 476 char header[8] = {0};
153 int i;
154
155 /* check RIFF header */
156 476 avio_read(pb, header, 4);
157 476 avi->riff_end = avio_rl32(pb); /* RIFF chunk size */
158 476 avi->riff_end += avio_tell(pb); /* RIFF chunk end */
159 476 avio_read(pb, header + 4, 4);
160
161
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 484 for (i = 0; avi_headers[i][0]; i++)
162
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 484 if (!memcmp(header, avi_headers[i], 8))
163 476 break;
164
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 476 if (!avi_headers[i][0])
165 ✗ return AVERROR_INVALIDDATA;
166
167
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 476 if (header[7] == 0x19)
168 ✗ av_log(s, AV_LOG_INFO,
169 "This file has been generated by a totally broken muxer.\n");
170
171 476 return 0;
172 }
173
174 44 static int read_odml_index(AVFormatContext *s, int64_t frame_num)
175 {
176 44 AVIContext *avi = s->priv_data;
177 44 AVIOContext *pb = s->pb;
178 44 int longs_per_entry = avio_rl16(pb);
179 44 int index_sub_type = avio_r8(pb);
180 44 int index_type = avio_r8(pb);
181 44 int entries_in_use = avio_rl32(pb);
182 44 int chunk_id = avio_rl32(pb);
183 44 int64_t base = avio_rl64(pb);
184 44 int stream_id = ((chunk_id & 0xFF) - '0') * 10 +
185 44 ((chunk_id >> 8 & 0xFF) - '0');
186 AVStream *st;
187 AVIStream *ast;
188 int i;
189 44 int64_t last_pos = -1;
190 44 int64_t filesize = avi->fsize;
191
192 44 av_log(s, AV_LOG_TRACE,
193 "longs_per_entry:%d index_type:%d entries_in_use:%d "
194 "chunk_id:%X base:%16"PRIX64" frame_num:%"PRId64"\n",
195 longs_per_entry,
196 index_type,
197 entries_in_use,
198 chunk_id,
199 base,
200 frame_num);
201
202
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 44 if (stream_id >= s->nb_streams || stream_id < 0)
203 13 return AVERROR_INVALIDDATA;
204 31 st = s->streams[stream_id];
205 31 ast = st->priv_data;
206
207
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 31 if (index_sub_type || entries_in_use < 0)
208 ✗ return AVERROR_INVALIDDATA;
209
210 31 avio_rl32(pb);
211
212
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 31 if (index_type && longs_per_entry != 2)
213 ✗ return AVERROR_INVALIDDATA;
214
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 31 if (index_type > 1)
215 ✗ return AVERROR_INVALIDDATA;
216
217
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 31 if (filesize > 0 && base >= filesize) {
218 ✗ av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
219 ✗ if (base >> 32 == (base & 0xFFFFFFFF) &&
220 ✗ (base & 0xFFFFFFFF) < filesize &&
221 filesize <= 0xFFFFFFFF)
222 ✗ base &= 0xFFFFFFFF;
223 else
224 ✗ return AVERROR_INVALIDDATA;
225 }
226
227
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 5715 for (i = 0; i < entries_in_use; i++) {
228
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 5697 avi->odml_max_pos = FFMAX(avi->odml_max_pos, avio_tell(pb));
229
230 // If we read more than there are bytes then we must have been reading something twice
231
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 5697 if (avi->odml_read > avi->odml_max_pos)
232 ✗ return AVERROR_INVALIDDATA;
233
234
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 5697 if (index_type) {
235 5675 int64_t pos = avio_rl32(pb) + base - 8;
236 5675 int len = avio_rl32(pb);
237 5675 int key = len >= 0;
238 5675 len &= 0x7FFFFFFF;
239 5675 avi->odml_read += 8;
240
241 5675 av_log(s, AV_LOG_TRACE, "pos:%"PRId64", len:%X\n", pos, len);
242
243
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 5675 if (avio_feof(pb))
244 ✗ return AVERROR_INVALIDDATA;
245
246
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 5675 if (last_pos == pos || pos == base - 8)
247 2 avi->non_interleaved = 1;
248
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 5675 if (last_pos != pos && len)
249 5457 av_add_index_entry(st, pos, ast->cum_len, len, 0,
250 key ? AVINDEX_KEYFRAME : 0);
251
252 5675 ast->cum_len += get_duration(ast, len);
253 5675 last_pos = pos;
254 } else {
255 int64_t offset, pos;
256 int duration;
257 int ret;
258 22 avi->odml_read += 16;
259
260 22 offset = avio_rl64(pb);
261 22 avio_rl32(pb); /* size */
262 22 duration = avio_rl32(pb);
263
264
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 22 if (avio_feof(pb) || offset > INT64_MAX - 8)
265 ✗ return AVERROR_INVALIDDATA;
266
267 22 pos = avio_tell(pb);
268
269
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 22 if (avi->odml_depth > MAX_ODML_DEPTH) {
270 ✗ av_log(s, AV_LOG_ERROR, "Too deeply nested ODML indexes\n");
271 ✗ return AVERROR_INVALIDDATA;
272 }
273
274
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 22 if (avio_seek(pb, offset + 8, SEEK_SET) < 0)
275 ✗ return -1;
276 22 avi->odml_depth++;
277 22 ret = read_odml_index(s, frame_num);
278 22 avi->odml_depth--;
279 22 frame_num += duration;
280
281
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 22 if (avio_seek(pb, pos, SEEK_SET) < 0) {
282 ✗ av_log(s, AV_LOG_ERROR, "Failed to restore position after reading index\n");
283 ✗ return -1;
284 }
285
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 22 if (ret < 0)
286 13 return ret;
287 }
288 }
289 18 avi->index_loaded = 2;
290 18 return 0;
291 }
292
293 7 static void clean_index(AVFormatContext *s)
294 {
295 int i;
296 int64_t j;
297
298
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 19 for (i = 0; i < s->nb_streams; i++) {
299 12 AVStream *st = s->streams[i];
300 12 FFStream *const sti = ffstream(st);
301 12 AVIStream *ast = st->priv_data;
302 12 int n = sti->nb_index_entries;
303 12 int max = ast->sample_size;
304 int64_t pos, size, ts;
305
306
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 12 if (n != 1 || ast->sample_size == 0)
307 10 continue;
308
309
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 20 while (max < 1024)
310 18 max += max;
311
312 2 pos = sti->index_entries[0].pos;
313 2 size = sti->index_entries[0].size;
314 2 ts = sti->index_entries[0].timestamp;
315
316
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 15 for (j = 0; j < size; j += max)
317 13 av_add_index_entry(st, pos + j, ts + j, FFMIN(max, size - j), 0,
318 AVINDEX_KEYFRAME);
319 }
320 7 }
321
322 19 static int avi_read_tag(AVFormatContext *s, AVStream *st, uint32_t tag,
323 uint32_t size)
324 {
325 19 AVIOContext *pb = s->pb;
326 19 char key[5] = { 0 };
327 char *value;
328
329 19 size += (size & 1);
330
331
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 19 if (size == UINT_MAX)
332 ✗ return AVERROR(EINVAL);
333 19 value = av_malloc(size + 1);
334
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 19 if (!value)
335 ✗ return AVERROR(ENOMEM);
336
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 19 if (avio_read(pb, value, size) != size) {
337 ✗ av_freep(&value);
338 ✗ return AVERROR_INVALIDDATA;
339 }
340 19 value[size] = 0;
341
342 19 AV_WL32(key, tag);
343
344
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 19 return av_dict_set(st ? &st->metadata : &s->metadata, key, value,
345 AV_DICT_DONT_STRDUP_VAL);
346 }
347
348 static const char months[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
349 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
350
351 1 static void avi_metadata_creation_time(AVDictionary **metadata, char *date)
352 {
353 char month[4], time[9], buffer[64];
354 int i, day, year;
355 /* parse standard AVI date format (ie. "Mon Mar 10 15:04:43 2003") */
356
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 1 if (sscanf(date, "%*3s%*[ ]%3s%*[ ]%2d%*[ ]%8s%*[ ]%4d",
357 month, &day, time, &year) == 4) {
358
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 13 for (i = 0; i < 12; i++)
359
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 12 if (!av_strcasecmp(month, months[i])) {
360 1 snprintf(buffer, sizeof(buffer), "%.4d-%.2d-%.2d %s",
361 year, i + 1, day, time);
362 1 av_dict_set(metadata, "creation_time", buffer, 0);
363 }
364 ✗ } else if (date[4] == '/' && date[7] == '/') {
365 ✗ date[4] = date[7] = '-';
366 ✗ av_dict_set(metadata, "creation_time", date, 0);
367 }
368 1 }
369
370 ✗ static void avi_read_nikon(AVFormatContext *s, uint64_t end)
371 {
372 ✗ while (avio_tell(s->pb) < end && !avio_feof(s->pb)) {
373 ✗ uint32_t tag = avio_rl32(s->pb);
374 ✗ uint32_t size = avio_rl32(s->pb);
375 ✗ switch (tag) {
376 ✗ case MKTAG('n', 'c', 't', 'g'): /* Nikon Tags */
377 {
378 ✗ uint64_t tag_end = avio_tell(s->pb) + size;
379 ✗ while (avio_tell(s->pb) < tag_end && !avio_feof(s->pb)) {
380 ✗ uint16_t tag = avio_rl16(s->pb);
381 ✗ uint16_t size = avio_rl16(s->pb);
382 ✗ const char *name = NULL;
383 ✗ char buffer[64] = { 0 };
384 ✗ uint64_t remaining = tag_end - avio_tell(s->pb);
385 ✗ size = FFMIN(size, remaining);
386 ✗ size -= avio_read(s->pb, buffer,
387 ✗ FFMIN(size, sizeof(buffer) - 1));
388 ✗ switch (tag) {
389 ✗ case 0x03:
390 ✗ name = "maker";
391 ✗ break;
392 ✗ case 0x04:
393 ✗ name = "model";
394 ✗ break;
395 ✗ case 0x13:
396 ✗ name = "creation_time";
397 ✗ if (buffer[4] == ':' && buffer[7] == ':')
398 ✗ buffer[4] = buffer[7] = '-';
399 ✗ break;
400 }
401 ✗ if (name)
402 ✗ av_dict_set(&s->metadata, name, buffer, 0);
403 ✗ avio_skip(s->pb, size);
404 }
405 ✗ break;
406 }
407 ✗ default:
408 ✗ avio_skip(s->pb, size);
409 ✗ break;
410 }
411 }
412 ✗ }
413
414 6 static int avi_extract_stream_metadata(AVFormatContext *s, AVStream *st)
415 {
416 GetByteContext gb;
417 6 uint8_t *data = st->codecpar->extradata;
418 6 int data_size = st->codecpar->extradata_size;
419 int tag, offset;
420
421
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 6 if (!data || data_size < 8) {
422 ✗ return AVERROR_INVALIDDATA;
423 }
424
425 6 bytestream2_init(&gb, data, data_size);
426
427 6 tag = bytestream2_get_le32(&gb);
428
429
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 6 switch (tag) {
430 ✗ case MKTAG('A', 'V', 'I', 'F'): {
431 ✗ AVExifMetadata ifd = { 0 };
432 int ret;
433 // skip 4 byte padding
434 ✗ bytestream2_skip(&gb, 4);
435 ✗ offset = bytestream2_tell(&gb);
436
437 // decode EXIF tags from IFD, AVI is always little-endian
438 ✗ ret = av_exif_parse_buffer(s, data + offset, data_size - offset, &ifd, AV_EXIF_ASSUME_LE);
439 ✗ if (ret < 0)
440 ✗ return ret;
441 ✗ ret = av_exif_ifd_to_dict(s, &ifd, &st->metadata);
442 ✗ av_exif_free(&ifd);
443 ✗ return ret;
444 }
445 ✗ case MKTAG('C', 'A', 'S', 'I'):
446 ✗ avpriv_request_sample(s, "RIFF stream data tag type CASI (%u)", tag);
447 ✗ break;
448 ✗ case MKTAG('Z', 'o', 'r', 'a'):
449 ✗ avpriv_request_sample(s, "RIFF stream data tag type Zora (%u)", tag);
450 ✗ break;
451 6 default:
452 6 break;
453 }
454
455 6 return 0;
456 }
457
458 476 static int calculate_bitrate(AVFormatContext *s)
459 {
460 476 AVIContext *avi = s->priv_data;
461 int i, j;
462 476 int64_t lensum = 0;
463 476 int64_t maxpos = 0;
464
465
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 996 for (i = 0; i<s->nb_streams; i++) {
466 520 int64_t len = 0;
467 520 FFStream *const sti = ffstream(s->streams[i]);
468
469
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 520 if (!sti->nb_index_entries)
470 60 continue;
471
472
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 31441 for (j = 0; j < sti->nb_index_entries; j++)
473 30981 len += sti->index_entries[j].size;
474 460 maxpos = FFMAX(maxpos, sti->index_entries[j-1].pos);
475 460 lensum += len;
476 }
477
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 476 if (maxpos < av_rescale(avi->io_fsize, 9, 10)) // index does not cover the whole file
478 106 return 0;
479
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 370 if (lensum*9/10 > maxpos || lensum < maxpos*9/10) // frame sum and filesize mismatch
480 27 return 0;
481
482
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 706 for (i = 0; i<s->nb_streams; i++) {
483 363 int64_t len = 0;
484 363 AVStream *st = s->streams[i];
485 363 FFStream *const sti = ffstream(st);
486 int64_t duration;
487 AVInteger bitrate_i, den_i, num_i;
488
489
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 28054 for (j = 0; j < sti->nb_index_entries; j++)
490 27691 len += sti->index_entries[j].size;
491
492
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 363 if (sti->nb_index_entries < 2 || st->codecpar->bit_rate > 0)
493 23 continue;
494 340 duration = sti->index_entries[j-1].timestamp - sti->index_entries[0].timestamp;
495 340 den_i = av_mul_i(av_int2i(duration), av_int2i(st->time_base.num));
496 340 num_i = av_add_i(av_mul_i(av_int2i(8*len), av_int2i(st->time_base.den)), av_shr_i(den_i, 1));
497 340 bitrate_i = av_div_i(num_i, den_i);
498
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 340 if (av_cmp_i(bitrate_i, av_int2i(INT64_MAX)) <= 0) {
499 340 int64_t bitrate = av_i2int(bitrate_i);
500
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 340 if (bitrate > 0) {
501 340 st->codecpar->bit_rate = bitrate;
502 }
503 }
504 }
505 343 return 1;
506 }
507
508 476 static int avi_read_header(AVFormatContext *s)
509 {
510 476 AVIContext *avi = s->priv_data;
511 476 AVIOContext *pb = s->pb;
512 unsigned int tag, tag1, handler;
513 int codec_type, stream_index, frame_period;
514 unsigned int size;
515 int i;
516 AVStream *st;
517 476 AVIStream *ast = NULL;
518 476 int avih_width = 0, avih_height = 0;
519 476 int amv_file_format = 0;
520 476 uint64_t list_end = 0;
521 int64_t pos;
522 int ret;
523 AVDictionaryEntry *dict_entry;
524
525 476 avi->stream_index = -1;
526
527 476 ret = get_riff(s, pb);
528
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 476 if (ret < 0)
529 ✗ return ret;
530
531 476 av_log(avi, AV_LOG_DEBUG, "use odml:%d\n", avi->use_odml);
532
533 476 avi->io_fsize = avi->fsize = avio_size(pb);
534
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 476 if (avi->fsize <= 0 || avi->fsize < avi->riff_end)
535
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 38 avi->fsize = avi->riff_end == 8 ? INT64_MAX : avi->riff_end;
536
537 /* first list tag */
538 476 stream_index = -1;
539 476 codec_type = -1;
540 476 frame_period = 0;
541 4207 for (;;) {
542
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 4683 if (avio_feof(pb))
543 ✗ return AVERROR_INVALIDDATA;
544 4683 tag = avio_rl32(pb);
545 4683 size = avio_rl32(pb);
546
547 4683 print_tag(s, "tag", tag, size);
548
549
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 4683 switch (tag) {
550 1596 case MKTAG('L', 'I', 'S', 'T'):
551 1596 list_end = avio_tell(pb) + size;
552 /* Ignored, except at start of video packets. */
553 1596 tag1 = avio_rl32(pb);
554
555 1596 print_tag(s, "list", tag1, 0);
556
557
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 1596 if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
558 476 avi->movi_list = avio_tell(pb) - 4;
559
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 476 if (size)
560 474 avi->movi_end = avi->movi_list + size + (size & 1);
561 else
562 2 avi->movi_end = avi->fsize;
563 476 av_log(s, AV_LOG_TRACE, "movi end=%"PRIx64"\n", avi->movi_end);
564 476 goto end_of_header;
565
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 1120 } else if (tag1 == MKTAG('I', 'N', 'F', 'O'))
566 65 ff_read_riff_info(s, size - 4);
567
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 1055 else if (tag1 == MKTAG('n', 'c', 'd', 't'))
568 ✗ avi_read_nikon(s, list_end);
569
570 4207 break;
571 1 case MKTAG('I', 'D', 'I', 'T'):
572 {
573 1 unsigned char date[64] = { 0 };
574 1 size += (size & 1);
575 1 size -= avio_read(pb, date, FFMIN(size, sizeof(date) - 1));
576 1 avio_skip(pb, size);
577 1 avi_metadata_creation_time(&s->metadata, date);
578 1 break;
579 }
580 42 case MKTAG('d', 'm', 'l', 'h'):
581 42 avi->is_odml = 1;
582 42 avio_skip(pb, size + (size & 1));
583 42 break;
584 2 case MKTAG('a', 'm', 'v', 'h'):
585 2 amv_file_format = 1;
586 476 case MKTAG('a', 'v', 'i', 'h'):
587 /* AVI header */
588 /* using frame_period is bad idea */
589 476 frame_period = avio_rl32(pb);
590 476 avio_rl32(pb); /* max. bytes per second */
591 476 avio_rl32(pb);
592 476 avi->non_interleaved |= avio_rl32(pb) & AVIF_MUSTUSEINDEX;
593
594 476 avio_skip(pb, 2 * 4);
595 476 avio_rl32(pb);
596 476 avio_rl32(pb);
597 476 avih_width = avio_rl32(pb);
598 476 avih_height = avio_rl32(pb);
599
600 476 avio_skip(pb, size - 10 * 4);
601 476 break;
602 521 case MKTAG('s', 't', 'r', 'h'):
603 /* stream header */
604
605 521 tag1 = avio_rl32(pb);
606 521 handler = avio_rl32(pb); /* codec tag */
607
608
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 521 if (tag1 == MKTAG('p', 'a', 'd', 's')) {
609 1 avio_skip(pb, size - 8);
610 1 break;
611 } else {
612 520 stream_index++;
613 520 st = avformat_new_stream(s, NULL);
614
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 520 if (!st)
615 ✗ return AVERROR(ENOMEM);
616
617 520 st->id = stream_index;
618 520 ast = av_mallocz(sizeof(AVIStream));
619
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 520 if (!ast)
620 ✗ return AVERROR(ENOMEM);
621 520 st->priv_data = ast;
622 }
623
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 520 if (amv_file_format)
624 4 tag1 = stream_index ? MKTAG('a', 'u', 'd', 's')
625
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 4 : MKTAG('v', 'i', 'd', 's');
626
627 520 print_tag(s, "strh", tag1, -1);
628
629
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 520 if (tag1 == MKTAG('i', 'a', 'v', 's') ||
630 tag1 == MKTAG('i', 'v', 'a', 's')) {
631 int64_t dv_dur;
632
633 /* After some consideration -- I don't think we
634 * have to support anything but DV in type1 AVIs. */
635 ✗ if (s->nb_streams != 1)
636 ✗ return AVERROR_INVALIDDATA;
637
638 ✗ if (handler != MKTAG('d', 'v', 's', 'd') &&
639 ✗ handler != MKTAG('d', 'v', 'h', 'd') &&
640 handler != MKTAG('d', 'v', 's', 'l'))
641 ✗ return AVERROR_INVALIDDATA;
642
643 if (!CONFIG_DV_DEMUXER)
644 return AVERROR_DEMUXER_NOT_FOUND;
645
646 ✗ ast = s->streams[0]->priv_data;
647 ✗ st->priv_data = NULL;
648 ✗ ff_remove_stream(s, st);
649
650 ✗ avi->dv_demux = avpriv_dv_init_demux(s);
651 ✗ if (!avi->dv_demux) {
652 ✗ av_free(ast);
653 ✗ return AVERROR(ENOMEM);
654 }
655
656 ✗ s->streams[0]->priv_data = ast;
657 ✗ avio_skip(pb, 3 * 4);
658 ✗ ast->scale = avio_rl32(pb);
659 ✗ ast->rate = avio_rl32(pb);
660 ✗ avio_skip(pb, 4); /* start time */
661
662 ✗ dv_dur = avio_rl32(pb);
663 ✗ if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) {
664 ✗ dv_dur *= AV_TIME_BASE;
665 ✗ s->duration = av_rescale(dv_dur, ast->scale, ast->rate);
666 }
667 /* else, leave duration alone; timing estimation in utils.c
668 * will make a guess based on bitrate. */
669
670 ✗ stream_index = s->nb_streams - 1;
671 ✗ avio_skip(pb, size - 9 * 4);
672 ✗ break;
673 }
674
675
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 520 av_assert0(stream_index < s->nb_streams);
676 520 ast->handler = handler;
677
678 520 avio_rl32(pb); /* flags */
679 520 avio_rl16(pb); /* priority */
680 520 avio_rl16(pb); /* language */
681 520 avio_rl32(pb); /* initial frame */
682 520 ast->scale = avio_rl32(pb);
683 520 ast->rate = avio_rl32(pb);
684
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 520 if (!(ast->scale && ast->rate)) {
685 4 av_log(s, AV_LOG_WARNING,
686 "scale/rate is %"PRIu32"/%"PRIu32" which is invalid. "
687 "(This file has been generated by broken software.)\n",
688 ast->scale,
689 ast->rate);
690
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 4 if (frame_period) {
691 4 ast->rate = 1000000;
692 4 ast->scale = frame_period;
693 } else {
694 ✗ ast->rate = 25;
695 ✗ ast->scale = 1;
696 }
697 }
698 520 avpriv_set_pts_info(st, 64, ast->scale, ast->rate);
699
700 520 ast->cum_len = avio_rl32(pb); /* start */
701 520 st->nb_frames = avio_rl32(pb);
702
703 520 st->start_time = 0;
704 520 avio_rl32(pb); /* buffer size */
705 520 avio_rl32(pb); /* quality */
706
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 520 if (ast->cum_len > 3600LL * ast->rate / ast->scale) {
707 ✗ av_log(s, AV_LOG_ERROR, "crazy start time, iam scared, giving up\n");
708 ✗ ast->cum_len = 0;
709 }
710 520 ast->sample_size = avio_rl32(pb);
711 520 ast->cum_len *= FFMAX(1, ast->sample_size);
712 520 av_log(s, AV_LOG_TRACE, "%"PRIu32" %"PRIu32" %d\n",
713 ast->rate, ast->scale, ast->sample_size);
714
715
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 520 switch (tag1) {
716 473 case MKTAG('v', 'i', 'd', 's'):
717 473 codec_type = AVMEDIA_TYPE_VIDEO;
718
719 473 ast->sample_size = 0;
720 473 st->avg_frame_rate = av_inv_q(st->time_base);
721 473 break;
722 47 case MKTAG('a', 'u', 'd', 's'):
723 47 codec_type = AVMEDIA_TYPE_AUDIO;
724 47 break;
725 ✗ case MKTAG('t', 'x', 't', 's'):
726 ✗ codec_type = AVMEDIA_TYPE_SUBTITLE;
727 ✗ break;
728 ✗ case MKTAG('d', 'a', 't', 's'):
729 ✗ codec_type = AVMEDIA_TYPE_DATA;
730 ✗ break;
731 ✗ default:
732 ✗ av_log(s, AV_LOG_INFO, "unknown stream type %X\n", tag1);
733 }
734
735
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 520 if (ast->sample_size < 0) {
736 ✗ if (s->error_recognition & AV_EF_EXPLODE) {
737 ✗ av_log(s, AV_LOG_ERROR,
738 "Invalid sample_size %d at stream %d\n",
739 ast->sample_size,
740 stream_index);
741 ✗ return AVERROR_INVALIDDATA;
742 }
743 ✗ av_log(s, AV_LOG_WARNING,
744 "Invalid sample_size %d at stream %d "
745 "setting it to 0\n",
746 ast->sample_size,
747 stream_index);
748 ✗ ast->sample_size = 0;
749 }
750
751
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 520 if (ast->sample_size == 0) {
752 483 st->duration = st->nb_frames;
753
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 483 if (st->duration > 0 && avi->io_fsize > 0 && avi->riff_end > avi->io_fsize) {
754 39 av_log(s, AV_LOG_DEBUG, "File is truncated adjusting duration\n");
755 39 st->duration = av_rescale(st->duration, avi->io_fsize, avi->riff_end);
756 }
757 }
758 520 ast->frame_offset = ast->cum_len;
759 520 avio_skip(pb, size - 12 * 4);
760 520 break;
761 520 case MKTAG('s', 't', 'r', 'f'):
762 /* stream header */
763
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 520 if (!size && (codec_type == AVMEDIA_TYPE_AUDIO ||
764 codec_type == AVMEDIA_TYPE_VIDEO))
765 break;
766
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 520 if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
767 ✗ avio_skip(pb, size);
768 } else {
769 520 uint64_t cur_pos = avio_tell(pb);
770 FFStream *sti;
771 unsigned esize;
772
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 520 if (cur_pos < list_end)
773 516 size = FFMIN(size, list_end - cur_pos);
774 520 st = s->streams[stream_index];
775 520 sti = ffstream(st);
776
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 520 if (st->codecpar->codec_type != AVMEDIA_TYPE_UNKNOWN) {
777 ✗ avio_skip(pb, size);
778 ✗ break;
779 }
780
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 520 switch (codec_type) {
781 473 case AVMEDIA_TYPE_VIDEO:
782
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 473 if (amv_file_format) {
783 2 st->codecpar->width = avih_width;
784 2 st->codecpar->height = avih_height;
785 2 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
786 2 st->codecpar->codec_id = AV_CODEC_ID_AMV;
787 2 avio_skip(pb, size);
788 520 break;
789 }
790 471 tag1 = ff_get_bmp_header(pb, st, &esize);
791
792
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 471 if (tag1 == MKTAG('D', 'X', 'S', 'B') ||
793 tag1 == MKTAG('D', 'X', 'S', 'A')) {
794 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
795 ✗ st->codecpar->codec_tag = tag1;
796 ✗ st->codecpar->codec_id = AV_CODEC_ID_XSUB;
797 ✗ break;
798 }
799
800
4/6
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 471 if (size > 10 * 4 && size < (1 << 30) && size < avi->fsize) {
801
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 170 if (esize == size-1 && (esize&1)) {
802 18 st->codecpar->extradata_size = esize - 10 * 4;
803 } else
804 152 st->codecpar->extradata_size = size - 10 * 4;
805
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 170 if (st->codecpar->extradata) {
806 ✗ av_log(s, AV_LOG_WARNING, "New extradata in strf chunk, freeing previous one.\n");
807 }
808 170 ret = ff_get_extradata(s, st->codecpar, pb,
809 170 st->codecpar->extradata_size);
810
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 170 if (ret < 0)
811 ✗ return ret;
812 }
813
814 // FIXME: check if the encoder really did this correctly
815
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 471 if (st->codecpar->extradata_size & 1)
816 18 avio_r8(pb);
817
818 /* Extract palette from extradata if bpp <= 8.
819 * This code assumes that extradata contains only palette.
820 * This is true for all paletted codecs implemented in
821 * FFmpeg. */
822
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 471 if (st->codecpar->extradata_size &&
823
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 170 (st->codecpar->bits_per_coded_sample <= 8)) {
824 15 int pal_size = (1 << st->codecpar->bits_per_coded_sample) << 2;
825 const uint8_t *pal_src;
826
827 15 pal_size = FFMIN(pal_size, st->codecpar->extradata_size);
828 15 pal_src = st->codecpar->extradata +
829 15 st->codecpar->extradata_size - pal_size;
830 /* Exclude the "BottomUp" field from the palette */
831
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 15 if (pal_src - st->codecpar->extradata >= 9 &&
832 ✗ !memcmp(st->codecpar->extradata + st->codecpar->extradata_size - 9, "BottomUp", 9))
833 ✗ pal_src -= 9;
834
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 2345 for (i = 0; i < pal_size / 4; i++)
835 2330 ast->pal[i] = 0xFFU<<24 | AV_RL32(pal_src + 4 * i);
836 15 ast->has_pal = 1;
837 }
838
839 471 print_tag(s, "video", tag1, 0);
840
841 471 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
842 471 st->codecpar->codec_tag = tag1;
843 471 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
844 tag1);
845 /* If codec is not found yet, try with the mov tags. */
846
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 471 if (!st->codecpar->codec_id) {
847 ✗ st->codecpar->codec_id =
848 ✗ ff_codec_get_id(ff_codec_movvideo_tags, tag1);
849 ✗ if (st->codecpar->codec_id)
850 ✗ av_log(s, AV_LOG_WARNING,
851 "mov tag found in avi (fourcc %s)\n",
852 ✗ av_fourcc2str(tag1));
853 }
854
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 471 if (!st->codecpar->codec_id)
855 ✗ st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags_unofficial, tag1);
856
857 /* This is needed to get the pict type which is necessary
858 * for generating correct pts. */
859 471 sti->need_parsing = AVSTREAM_PARSE_HEADERS;
860
861
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 471 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4 &&
862
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 56 ast->handler == MKTAG('X', 'V', 'I', 'D'))
863 2 st->codecpar->codec_tag = MKTAG('X', 'V', 'I', 'D');
864
865
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 471 if (st->codecpar->codec_tag == MKTAG('V', 'S', 'S', 'H'))
866 ✗ sti->need_parsing = AVSTREAM_PARSE_FULL;
867
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 471 if (st->codecpar->codec_id == AV_CODEC_ID_RV40)
868 ✗ sti->need_parsing = AVSTREAM_PARSE_NONE;
869
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 471 if (st->codecpar->codec_id == AV_CODEC_ID_HEVC &&
870 ✗ st->codecpar->codec_tag == MKTAG('H', '2', '6', '5'))
871 ✗ sti->need_parsing = AVSTREAM_PARSE_FULL;
872
873
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 471 if (st->codecpar->codec_id == AV_CODEC_ID_AVRN &&
874
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 1 st->codecpar->codec_tag == MKTAG('A', 'V', 'R', 'n') &&
875
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 1 (st->codecpar->extradata_size < 31 ||
876
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 1 memcmp(&st->codecpar->extradata[28], "1:1", 3)))
877 ✗ st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
878
879
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 471 if (st->codecpar->codec_tag == 0 && st->codecpar->height > 0 &&
880 ✗ st->codecpar->extradata_size < 1U << 30) {
881 ✗ st->codecpar->extradata_size += 9;
882 ✗ if ((ret = av_reallocp(&st->codecpar->extradata,
883 ✗ st->codecpar->extradata_size +
884 AV_INPUT_BUFFER_PADDING_SIZE)) < 0) {
885 ✗ st->codecpar->extradata_size = 0;
886 ✗ return ret;
887 } else
888 ✗ memcpy(st->codecpar->extradata + st->codecpar->extradata_size - 9,
889 "BottomUp", 9);
890 }
891
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 471 if (st->codecpar->height == INT_MIN)
892 ✗ return AVERROR_INVALIDDATA;
893 471 st->codecpar->height = FFABS(st->codecpar->height);
894
895 // avio_skip(pb, size - 5 * 4);
896 471 break;
897 47 case AVMEDIA_TYPE_AUDIO:
898 47 ret = ff_get_wav_header(s, pb, st->codecpar, size, 0);
899
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 47 if (ret < 0)
900 ✗ return ret;
901 47 ast->dshow_block_align = st->codecpar->block_align;
902
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 47 if (ast->sample_size && st->codecpar->block_align &&
903
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 37 ast->sample_size != st->codecpar->block_align) {
904 ✗ av_log(s,
905 AV_LOG_WARNING,
906 "sample size (%d) != block align (%d)\n",
907 ast->sample_size,
908 ✗ st->codecpar->block_align);
909 ✗ ast->sample_size = st->codecpar->block_align;
910 }
911 /* 2-aligned
912 * (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
913
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 47 if (size & 1)
914 ✗ avio_skip(pb, 1);
915 /* Force parsing as several audio frames can be in
916 * one packet and timestamps refer to packet start. */
917 47 sti->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
918 /* ADTS header is in extradata, AAC without header must be
919 * stored as exact frames. Parser not needed and it will
920 * fail. */
921
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 47 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
922 ✗ st->codecpar->extradata_size)
923 ✗ sti->need_parsing = AVSTREAM_PARSE_NONE;
924 // The flac parser does not work with AVSTREAM_PARSE_TIMESTAMPS
925
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 47 if (st->codecpar->codec_id == AV_CODEC_ID_FLAC)
926 ✗ sti->need_parsing = AVSTREAM_PARSE_NONE;
927 /* AVI files with Xan DPCM audio (wrongly) declare PCM
928 * audio in the header but have Axan as stream_code_tag. */
929
2/2
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 47 if (ast->handler == AV_RL32("Axan")) {
930 2 st->codecpar->codec_id = AV_CODEC_ID_XAN_DPCM;
931 2 st->codecpar->codec_tag = 0;
932 2 ast->dshow_block_align = 0;
933 }
934
2/2
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 47 if (amv_file_format) {
935 2 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_AMV;
936 2 ast->dshow_block_align = 0;
937 }
938
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 47 if ((st->codecpar->codec_id == AV_CODEC_ID_AAC ||
939
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 47 st->codecpar->codec_id == AV_CODEC_ID_FTR ||
940
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 47 st->codecpar->codec_id == AV_CODEC_ID_FLAC ||
941
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 47 st->codecpar->codec_id == AV_CODEC_ID_MP2 ) && ast->dshow_block_align <= 4 && ast->dshow_block_align) {
942 ✗ av_log(s, AV_LOG_DEBUG, "overriding invalid dshow_block_align of %d\n", ast->dshow_block_align);
943 ✗ ast->dshow_block_align = 0;
944 }
945
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 47 if (st->codecpar->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 1024 && ast->sample_size == 1024 ||
946
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 47 st->codecpar->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 4096 && ast->sample_size == 4096 ||
947
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 47 st->codecpar->codec_id == AV_CODEC_ID_MP3 && ast->dshow_block_align == 1152 && ast->sample_size == 1152) {
948 ✗ av_log(s, AV_LOG_DEBUG, "overriding sample_size\n");
949 ✗ ast->sample_size = 0;
950 }
951 47 break;
952 ✗ case AVMEDIA_TYPE_SUBTITLE:
953 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
954 ✗ sti->request_probe = 1;
955 ✗ avio_skip(pb, size);
956 ✗ break;
957 ✗ default:
958 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
959 ✗ st->codecpar->codec_id = AV_CODEC_ID_NONE;
960 ✗ st->codecpar->codec_tag = 0;
961 ✗ avio_skip(pb, size);
962 ✗ break;
963 }
964 }
965 520 break;
966 11 case MKTAG('s', 't', 'r', 'd'):
967
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 11 if (stream_index >= (unsigned)s->nb_streams
968
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 11 || s->streams[stream_index]->codecpar->extradata_size
969
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 6 || s->streams[stream_index]->codecpar->codec_tag == MKTAG('H','2','6','4')) {
970 5 avio_skip(pb, size);
971 } else {
972 6 uint64_t cur_pos = avio_tell(pb);
973
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 6 if (cur_pos < list_end)
974 6 size = FFMIN(size, list_end - cur_pos);
975 6 st = s->streams[stream_index];
976
977
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 6 if (size<(1<<30)) {
978
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 6 if (st->codecpar->extradata) {
979 ✗ av_log(s, AV_LOG_WARNING, "New extradata in strd chunk, freeing previous one.\n");
980 }
981
1/2
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 6 if ((ret = ff_get_extradata(s, st->codecpar, pb, size)) < 0)
982 ✗ return ret;
983 }
984
985
1/2
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 6 if (st->codecpar->extradata_size & 1) //FIXME check if the encoder really did this correctly
986 ✗ avio_r8(pb);
987
988 6 ret = avi_extract_stream_metadata(s, st);
989
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 6 if (ret < 0) {
990 ✗ av_log(s, AV_LOG_WARNING, "could not decoding EXIF data in stream header.\n");
991 }
992 }
993 11 break;
994 22 case MKTAG('i', 'n', 'd', 'x'):
995 22 pos = avio_tell(pb);
996
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 22 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(s->flags & AVFMT_FLAG_IGNIDX) &&
997
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 44 avi->use_odml &&
998 22 read_odml_index(s, 0) < 0 &&
999
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 13 (s->error_recognition & AV_EF_EXPLODE))
1000 ✗ return AVERROR_INVALIDDATA;
1001 22 avio_seek(pb, pos + size, SEEK_SET);
1002 22 break;
1003 10 case MKTAG('v', 'p', 'r', 'p'):
1004
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 10 if (stream_index < (unsigned)s->nb_streams && size > 9 * 4) {
1005 AVRational active, active_aspect;
1006
1007 10 st = s->streams[stream_index];
1008 10 avio_rl32(pb);
1009 10 avio_rl32(pb);
1010 10 avio_rl32(pb);
1011 10 avio_rl32(pb);
1012 10 avio_rl32(pb);
1013
1014 10 active_aspect.den = avio_rl16(pb);
1015 10 active_aspect.num = avio_rl16(pb);
1016 10 active.num = avio_rl32(pb);
1017 10 active.den = avio_rl32(pb);
1018 10 avio_rl32(pb); // nbFieldsPerFrame
1019
1020
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 10 if (active_aspect.num && active_aspect.den &&
1021
2/4
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 10 active.num && active.den) {
1022 10 st->sample_aspect_ratio = av_div_q(active_aspect, active);
1023 10 av_log(s, AV_LOG_TRACE, "vprp %d/%d %d/%d\n",
1024 active_aspect.num, active_aspect.den,
1025 active.num, active.den);
1026 }
1027 10 size -= 9 * 4;
1028 }
1029 10 avio_skip(pb, size);
1030 10 break;
1031 19 case MKTAG('s', 't', 'r', 'n'):
1032 case MKTAG('i', 's', 'b', 'j'):
1033 case MKTAG('i', 'n', 'a', 'm'):
1034 case MKTAG('i', 'a', 'r', 't'):
1035 case MKTAG('i', 'c', 'o', 'p'):
1036 case MKTAG('i', 'c', 'm', 't'):
1037 case MKTAG('i', 'g', 'n', 'r'):
1038 case MKTAG('i', 'p', 'o', 'd'):
1039 case MKTAG('i', 's', 'o', 'f'):
1040
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 19 if (s->nb_streams) {
1041 19 ret = avi_read_tag(s, s->streams[s->nb_streams - 1], tag, size);
1042
1/2
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✓ Branch 1 taken 19 times.
 19 if (ret < 0)
1043 ✗ return ret;
1044 19 break;
1045 }
1046 default:
1047
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 1465 if (size > 1000000) {
1048 ✗ av_log(s, AV_LOG_ERROR,
1049 "Something went wrong during header parsing, "
1050 "tag %s has size %u, "
1051 "I will ignore it and try to continue anyway.\n",
1052 ✗ av_fourcc2str(tag), size);
1053 ✗ if (s->error_recognition & AV_EF_EXPLODE)
1054 ✗ return AVERROR_INVALIDDATA;
1055 ✗ avi->movi_list = avio_tell(pb) - 4;
1056 ✗ avi->movi_end = avi->fsize;
1057 ✗ goto end_of_header;
1058 }
1059 /* Do not fail for very large idx1 tags */
1060 case MKTAG('i', 'd', 'x', '1'):
1061 /* skip tag */
1062 1465 size += (size & 1);
1063 1465 avio_skip(pb, size);
1064 1465 break;
1065 }
1066 }
1067
1068 476 end_of_header:
1069 /* check stream number */
1070
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 476 if (stream_index != s->nb_streams - 1)
1071 ✗ return AVERROR_INVALIDDATA;
1072
1073
3/4
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 476 if (!avi->index_loaded && (pb->seekable & AVIO_SEEKABLE_NORMAL))
1074 470 avi_load_index(s);
1075 476 calculate_bitrate(s);
1076 476 avi->index_loaded |= 1;
1077
1078
1/2
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✓ Branch 2 taken 476 times.
 476 if ((ret = guess_ni_flag(s)) < 0)
1079 ✗ return ret;
1080
1081 476 avi->non_interleaved |= ret | (s->flags & AVFMT_FLAG_SORT_DTS);
1082
1083 476 dict_entry = av_dict_get(s->metadata, "ISFT", NULL, 0);
1084
3/4
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 476 if (dict_entry && !strcmp(dict_entry->value, "PotEncoder"))
1085 ✗ for (i = 0; i < s->nb_streams; i++) {
1086 ✗ AVStream *st = s->streams[i];
1087 ✗ if ( st->codecpar->codec_id == AV_CODEC_ID_MPEG1VIDEO
1088 ✗ || st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO)
1089 ✗ ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
1090 }
1091
1092
2/2
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 534 for (i = 0; i < s->nb_streams; i++) {
1093 496 AVStream *st = s->streams[i];
1094
2/2
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✓ Branch 2 taken 58 times.
 496 if (ffstream(st)->nb_index_entries)
1095 438 break;
1096 }
1097 // DV-in-AVI cannot be non-interleaved, if set this must be
1098 // a mis-detection.
1099
1/2
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✓ Branch 1 taken 476 times.
 476 if (avi->dv_demux)
1100 ✗ avi->non_interleaved = 0;
1101
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✓ Branch 3 taken 36 times.
 476 if (i == s->nb_streams && avi->non_interleaved) {
1102 2 av_log(s, AV_LOG_WARNING,
1103 "Non-interleaved AVI without index, switching to interleaved\n");
1104 2 avi->non_interleaved = 0;
1105 }
1106
1107
2/2
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 476 if (avi->non_interleaved) {
1108 7 av_log(s, AV_LOG_INFO, "non-interleaved AVI\n");
1109 7 clean_index(s);
1110 }
1111
1112 476 ff_metadata_conv_ctx(s, NULL, avi_metadata_conv);
1113 476 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
1114
1115 476 return 0;
1116 }
1117
1118 ✗ static int read_gab2_sub(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1119 {
1120 ✗ if (pkt->size >= 7 &&
1121 ✗ pkt->size < INT_MAX - AVPROBE_PADDING_SIZE &&
1122 ✗ !strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data + 5) == 2) {
1123 uint8_t desc[256];
1124 ✗ int score = AVPROBE_SCORE_EXTENSION, ret;
1125 ✗ AVIStream *ast = st->priv_data;
1126 const AVInputFormat *sub_demuxer;
1127 AVRational time_base;
1128 int size;
1129 AVProbeData pd;
1130 unsigned int desc_len;
1131
1132 ✗ if (ast->sub_ctx)
1133 ✗ return 0;
1134
1135 ✗ AVIOContext *pb = avio_alloc_context(pkt->data + 7,
1136 ✗ pkt->size - 7,
1137 0, NULL, NULL, NULL, NULL);
1138 ✗ if (!pb)
1139 ✗ goto error;
1140
1141 ✗ desc_len = avio_rl32(pb);
1142
1143 ✗ if (desc_len > pb->buf_end - pb->buf_ptr)
1144 ✗ goto error;
1145
1146 ✗ ret = avio_get_str16le(pb, desc_len, desc, sizeof(desc));
1147 ✗ avio_skip(pb, desc_len - ret);
1148 ✗ if (*desc)
1149 ✗ av_dict_set(&st->metadata, "title", desc, 0);
1150
1151 ✗ avio_rl16(pb); /* flags? */
1152 ✗ avio_rl32(pb); /* data size */
1153
1154 ✗ size = pb->buf_end - pb->buf_ptr;
1155 ✗ pd = (AVProbeData) { .buf = av_mallocz(size + AVPROBE_PADDING_SIZE),
1156 .buf_size = size };
1157 ✗ if (!pd.buf)
1158 ✗ goto error;
1159 ✗ memcpy(pd.buf, pb->buf_ptr, size);
1160 ✗ sub_demuxer = av_probe_input_format2(&pd, 1, &score);
1161 ✗ av_freep(&pd.buf);
1162 ✗ if (!sub_demuxer)
1163 ✗ goto error;
1164
1165 ✗ if (strcmp(sub_demuxer->name, "srt") && strcmp(sub_demuxer->name, "ass"))
1166 ✗ goto error;
1167
1168 ✗ if (!(ast->sub_pkt = av_packet_alloc()))
1169 ✗ goto error;
1170
1171 ✗ if (!(ast->sub_ctx = avformat_alloc_context()))
1172 ✗ goto error;
1173
1174 ✗ ast->sub_ctx->pb = pb;
1175
1176 ✗ if (ff_copy_whiteblacklists(ast->sub_ctx, s) < 0)
1177 ✗ goto error;
1178
1179 ✗ if (!avformat_open_input(&ast->sub_ctx, "", sub_demuxer, NULL)) {
1180 ✗ if (ast->sub_ctx->nb_streams != 1)
1181 ✗ goto error;
1182 ✗ ff_read_packet(ast->sub_ctx, ast->sub_pkt);
1183 ✗ avcodec_parameters_copy(st->codecpar, ast->sub_ctx->streams[0]->codecpar);
1184 ✗ time_base = ast->sub_ctx->streams[0]->time_base;
1185 ✗ avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
1186 }
1187 ✗ ast->sub_buffer = pkt->buf;
1188 ✗ pkt->buf = NULL;
1189 ✗ av_packet_unref(pkt);
1190 ✗ return 1;
1191
1192 ✗ error:
1193 ✗ av_packet_free(&ast->sub_pkt);
1194 ✗ av_freep(&ast->sub_ctx);
1195 ✗ avio_context_free(&pb);
1196 }
1197 ✗ return 0;
1198 }
1199
1200 27447 static AVStream *get_subtitle_pkt(AVFormatContext *s, AVStream *next_st,
1201 AVPacket *pkt)
1202 {
1203 27447 AVIStream *ast, *next_ast = next_st->priv_data;
1204 27447 int64_t ts, next_ts, ts_min = INT64_MAX;
1205 27447 AVStream *st, *sub_st = NULL;
1206 int i;
1207
1208 27447 next_ts = av_rescale_q(next_ast->frame_offset, next_st->time_base,
1209 27447 AV_TIME_BASE_Q);
1210
1211
2/2
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 61697 for (i = 0; i < s->nb_streams; i++) {
1212 34250 st = s->streams[i];
1213 34250 ast = st->priv_data;
1214
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 34250 if (st->discard < AVDISCARD_ALL && ast && ast->sub_pkt && ast->sub_pkt->data) {
1215 ✗ ts = av_rescale_q(ast->sub_pkt->dts, st->time_base, AV_TIME_BASE_Q);
1216 ✗ if (ts <= next_ts && ts < ts_min) {
1217 ✗ ts_min = ts;
1218 ✗ sub_st = st;
1219 }
1220 }
1221 }
1222
1223
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✓ Branch 1 taken 27447 times.
 27447 if (sub_st) {
1224 ✗ ast = sub_st->priv_data;
1225 ✗ av_packet_move_ref(pkt, ast->sub_pkt);
1226 ✗ pkt->stream_index = sub_st->index;
1227
1228 ✗ if (ff_read_packet(ast->sub_ctx, ast->sub_pkt) < 0)
1229 ✗ ast->sub_pkt->data = NULL;
1230 }
1231 27447 return sub_st;
1232 }
1233
1234 524575 static int get_stream_idx(const unsigned *d)
1235 {
1236
4/4
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 524575 if (d[0] >= '0' && d[0] <= '9' &&
1237
4/4
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✓ Branch 3 taken 31137 times.
 95709 d[1] >= '0' && d[1] <= '9') {
1238 64212 return (d[0] - '0') * 10 + (d[1] - '0');
1239 } else {
1240 460363 return 100; // invalid stream ID
1241 }
1242 }
1243
1244 /**
1245 *
1246 * @param exit_early set to 1 to just gather packet position without making the changes needed to actually read & return the packet
1247 */
1248 27534 static int avi_sync(AVFormatContext *s, int exit_early)
1249 {
1250 27534 AVIContext *avi = s->priv_data;
1251 27534 AVIOContext *pb = s->pb;
1252 int n;
1253 unsigned int d[8];
1254 unsigned int size;
1255 int64_t i, sync;
1256
1257 5102 start_sync:
1258 32636 memset(d, -1, sizeof(d));
1259
2/2
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✓ Branch 3 taken 487 times.
 369186 for (i = sync = avio_tell(pb); !avio_feof(pb); i++) {
1260 int j;
1261
1262
2/2
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 2949592 for (j = 0; j < 7; j++)
1263 2580893 d[j] = d[j + 1];
1264 368699 d[7] = avio_r8(pb);
1265
1266 368699 size = d[4] + (d[5] << 8) + (d[6] << 16) + (d[7] << 24);
1267
1268 368699 n = get_stream_idx(d + 2);
1269 ff_tlog(s, "%X %X %X %X %X %X %X %X %"PRId64" %u %d\n",
1270 d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
1271
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 368699 if (i*(avi->io_fsize>0) + (uint64_t)size > avi->fsize || d[0] > 127)
1272 254211 continue;
1273
1274 // parse ix##
1275
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 114488 if ((d[0] == 'i' && d[1] == 'x' && n < s->nb_streams) ||
1276 // parse JUNK
1277
6/8
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 114487 (d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K') ||
1278
6/8
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 114020 (d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1') ||
1279
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 113542 (d[0] == 'i' && d[1] == 'n' && d[2] == 'd' && d[3] == 'x')) {
1280 946 avio_skip(pb, size);
1281 946 goto start_sync;
1282 }
1283
1284 // parse stray LIST
1285
6/8
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 113542 if (d[0] == 'L' && d[1] == 'I' && d[2] == 'S' && d[3] == 'T') {
1286 662 avio_skip(pb, 4);
1287 662 goto start_sync;
1288 }
1289
1290 112880 n = get_stream_idx(d);
1291
1292
2/2
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 112880 if (!((i - avi->last_pkt_pos) & 1) &&
1293
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✓ Branch 2 taken 41187 times.
 42158 get_stream_idx(d + 1) < s->nb_streams)
1294 971 continue;
1295
1296 // detect ##ix chunk and skip
1297
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 111909 if (d[2] == 'i' && d[3] == 'x' && n < s->nb_streams) {
1298 ✗ avio_skip(pb, size);
1299 ✗ goto start_sync;
1300 }
1301
1302
3/6
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✗ Branch 2 not taken.
✓ Branch 3 taken 6304 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 111909 if (d[2] == 'w' && d[3] == 'c' && n < s->nb_streams) {
1303 ✗ avio_skip(pb, 16 * 3 + 8);
1304 ✗ goto start_sync;
1305 }
1306
1307
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 111909 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 111909 if (avi->dv_demux && n != 0)
1308 ✗ continue;
1309
1310 // parse ##dc/##wb
1311
2/2
✓ Branch 0 taken 30541 times.
✓ Branch 1 taken 81368 times.
 111909 if (n < s->nb_streams) {
1312 AVStream *st;
1313 AVIStream *ast;
1314 30541 st = s->streams[n];
1315 30541 ast = st->priv_data;
1316
1317
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30541 times.
 30541 if (!ast) {
1318 ✗ av_log(s, AV_LOG_WARNING, "Skipping foreign stream %d packet\n", n);
1319 ✗ continue;
1320 }
1321
1322
2/2
✓ Branch 0 taken 9747 times.
✓ Branch 1 taken 20794 times.
 30541 if (s->nb_streams >= 2) {
1323 9747 AVStream *st1 = s->streams[1];
1324 9747 AVIStream *ast1 = st1->priv_data;
1325 // workaround for broken small-file-bug402.avi
1326
4/6
✓ Branch 0 taken 9747 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 3699 times.
✓ Branch 3 taken 6048 times.
✓ Branch 4 taken 3699 times.
✗ Branch 5 not taken.
 9747 if (ast1 && d[2] == 'w' && d[3] == 'b'
1327
2/2
✓ Branch 0 taken 314 times.
✓ Branch 1 taken 3385 times.
 3699 && n == 0
1328
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 314 times.
 314 && st ->codecpar->codec_type == AVMEDIA_TYPE_VIDEO
1329 ✗ && st1->codecpar->codec_type == AVMEDIA_TYPE_AUDIO
1330 ✗ && ast->prefix == 'd'*256+'c'
1331 ✗ && (d[2]*256+d[3] == ast1->prefix || !ast1->prefix_count)
1332 ) {
1333 ✗ n = 1;
1334 ✗ st = st1;
1335 ✗ ast = ast1;
1336 ✗ av_log(s, AV_LOG_WARNING,
1337 "Invalid stream + prefix combination, assuming audio.\n");
1338 }
1339 }
1340
1341
4/6
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✓ Branch 2 taken 4 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 4 times.
✗ Branch 5 not taken.
 30541 if (d[2] == 'p' && d[3] == 'c' && size <= 4 * 256 + 4) {
1342 4 int k = avio_r8(pb);
1343 4 int last = (k + avio_r8(pb) - 1) & 0xFF;
1344
1345 4 avio_rl16(pb); // flags
1346
1347 // b + (g << 8) + (r << 16);
1348
2/2
✓ Branch 0 taken 759 times.
✓ Branch 1 taken 4 times.
 763 for (; k <= last; k++)
1349 759 ast->pal[k] = 0xFFU<<24 | avio_rb32(pb)>>8;
1350
1351 4 ast->has_pal = 1;
1352 4 goto start_sync;
1353
4/4
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✓ Branch 2 taken 27073 times.
✓ Branch 3 taken 14 times.
 30537 } else if (((ast->prefix_count < 5 || sync + 9 > i) &&
1354
2/4
✓ Branch 0 taken 30523 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 30523 times.
 30523 d[2] < 128 && d[3] < 128) ||
1355
1/2
✓ Branch 0 taken 14 times.
✗ Branch 1 not taken.
 14 d[2] * 256 + d[3] == ast->prefix /* ||
1356 (d[2] == 'd' && d[3] == 'c') ||
1357 (d[2] == 'w' && d[3] == 'b') */) {
1358
2/2
✓ Branch 0 taken 432 times.
✓ Branch 1 taken 30105 times.
 30537 if (exit_early)
1359 432 return 0;
1360
2/2
✓ Branch 0 taken 29514 times.
✓ Branch 1 taken 591 times.
 30105 if (d[2] * 256 + d[3] == ast->prefix)
1361 29514 ast->prefix_count++;
1362 else {
1363 591 ast->prefix = d[2] * 256 + d[3];
1364 591 ast->prefix_count = 0;
1365 }
1366
1367
1/2
✓ Branch 0 taken 30105 times.
✗ Branch 1 not taken.
 30105 if (!avi->dv_demux &&
1368
4/4
✓ Branch 0 taken 4925 times.
✓ Branch 1 taken 25180 times.
✓ Branch 2 taken 4123 times.
✓ Branch 3 taken 802 times.
 30105 ((st->discard >= AVDISCARD_DEFAULT && size == 0) /* ||
1369 // FIXME: needs a little reordering
1370 (st->discard >= AVDISCARD_NONKEY &&
1371 !(pkt->flags & AV_PKT_FLAG_KEY)) */
1372
2/2
✓ Branch 0 taken 2688 times.
✓ Branch 1 taken 26615 times.
 29303 || st->discard >= AVDISCARD_ALL)) {
1373
1374 3490 ast->frame_offset += get_duration(ast, size);
1375 3490 avio_skip(pb, size);
1376 3490 goto start_sync;
1377 }
1378
1379 26615 avi->stream_index = n;
1380 26615 ast->packet_size = size + 8;
1381 26615 ast->remaining = size;
1382
1383
2/2
✓ Branch 0 taken 25168 times.
✓ Branch 1 taken 1447 times.
 26615 if (size) {
1384 25168 FFStream *const sti = ffstream(st);
1385 25168 uint64_t pos = avio_tell(pb) - 8;
1386
3/4
✓ Branch 0 taken 25111 times.
✓ Branch 1 taken 57 times.
✓ Branch 2 taken 25111 times.
✗ Branch 3 not taken.
 25168 if (!sti->index_entries || !sti->nb_index_entries ||
1387
2/2
✓ Branch 0 taken 3160 times.
✓ Branch 1 taken 21951 times.
 25111 sti->index_entries[sti->nb_index_entries - 1].pos < pos) {
1388 3217 av_add_index_entry(st, pos, ast->frame_offset, size,
1389 0, AVINDEX_KEYFRAME);
1390 }
1391 }
1392 26615 return 0;
1393 }
1394 }
1395 }
1396
1397
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 487 times.
 487 if (pb->error)
1398 ✗ return pb->error;
1399 487 return AVERROR_EOF;
1400 }
1401
1402 766 static int ni_prepare_read(AVFormatContext *s)
1403 {
1404 766 AVIContext *avi = s->priv_data;
1405 766 int best_stream_index = 0;
1406 766 AVStream *best_st = NULL;
1407 FFStream *best_sti;
1408 AVIStream *best_ast;
1409 766 int64_t best_ts = INT64_MAX;
1410 int i;
1411
1412
2/2
✓ Branch 0 taken 1288 times.
✓ Branch 1 taken 766 times.
 2054 for (i = 0; i < s->nb_streams; i++) {
1413 1288 AVStream *st = s->streams[i];
1414 1288 FFStream *const sti = ffstream(st);
1415 1288 AVIStream *ast = st->priv_data;
1416 1288 int64_t ts = ast->frame_offset;
1417 int64_t last_ts;
1418
1419
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1288 times.
 1288 if (!sti->nb_index_entries)
1420 16 continue;
1421
1422 1288 last_ts = sti->index_entries[sti->nb_index_entries - 1].timestamp;
1423
4/4
✓ Branch 0 taken 858 times.
✓ Branch 1 taken 430 times.
✓ Branch 2 taken 16 times.
✓ Branch 3 taken 842 times.
 1288 if (!ast->remaining && ts > last_ts)
1424 16 continue;
1425
1426 1272 ts = av_rescale_q(ts, st->time_base,
1427 1272 (AVRational) { FFMAX(1, ast->sample_size),
1428 AV_TIME_BASE });
1429
1430 1272 av_log(s, AV_LOG_TRACE, "%"PRId64" %d/%d %"PRId64"\n", ts,
1431 st->time_base.num, st->time_base.den, ast->frame_offset);
1432
2/2
✓ Branch 0 taken 975 times.
✓ Branch 1 taken 297 times.
 1272 if (ts < best_ts) {
1433 975 best_ts = ts;
1434 975 best_st = st;
1435 975 best_stream_index = i;
1436 }
1437 }
1438
2/2
✓ Branch 0 taken 5 times.
✓ Branch 1 taken 761 times.
 766 if (!best_st)
1439 5 return AVERROR_EOF;
1440
1441 761 best_sti = ffstream(best_st);
1442 761 best_ast = best_st->priv_data;
1443 761 best_ts = best_ast->frame_offset;
1444
2/2
✓ Branch 0 taken 181 times.
✓ Branch 1 taken 580 times.
 761 if (best_ast->remaining) {
1445 181 i = av_index_search_timestamp(best_st,
1446 best_ts,
1447 AVSEEK_FLAG_ANY |
1448 AVSEEK_FLAG_BACKWARD);
1449 } else {
1450 580 i = av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
1451
1/2
✓ Branch 0 taken 580 times.
✗ Branch 1 not taken.
 580 if (i >= 0)
1452 580 best_ast->frame_offset = best_sti->index_entries[i].timestamp;
1453 }
1454
1455
1/2
✓ Branch 0 taken 761 times.
✗ Branch 1 not taken.
 761 if (i >= 0) {
1456 761 int64_t pos = best_sti->index_entries[i].pos;
1457 761 pos += best_ast->packet_size - best_ast->remaining;
1458
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 761 times.
 761 if (avio_seek(s->pb, pos + 8, SEEK_SET) < 0)
1459 ✗ return AVERROR_EOF;
1460
1461
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 761 times.
 761 av_assert0(best_ast->remaining <= best_ast->packet_size);
1462
1463 761 avi->stream_index = best_stream_index;
1464
2/2
✓ Branch 0 taken 580 times.
✓ Branch 1 taken 181 times.
 761 if (!best_ast->remaining)
1465 580 best_ast->packet_size =
1466 580 best_ast->remaining = best_sti->index_entries[i].size;
1467 }
1468 else
1469 ✗ return AVERROR_EOF;
1470
1471 761 return 0;
1472 }
1473
1474 27938 static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
1475 {
1476 27938 AVIContext *avi = s->priv_data;
1477 27938 AVIOContext *pb = s->pb;
1478 int err;
1479
1480
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 27938 times.
 27938 if (CONFIG_DV_DEMUXER && avi->dv_demux) {
1481 ✗ int size = avpriv_dv_get_packet(avi->dv_demux, pkt);
1482 ✗ if (size >= 0)
1483 ✗ return size;
1484 else
1485 ✗ goto resync;
1486 }
1487
1488
2/2
✓ Branch 0 taken 27172 times.
✓ Branch 1 taken 766 times.
 27938 if (avi->non_interleaved) {
1489 766 err = ni_prepare_read(s);
1490
2/2
✓ Branch 0 taken 761 times.
✓ Branch 1 taken 5 times.
 766 if (err < 0)
1491 5 return err;
1492 }
1493
1494 54549 resync:
1495
2/2
✓ Branch 0 taken 27447 times.
✓ Branch 1 taken 27102 times.
 54549 if (avi->stream_index >= 0) {
1496 27447 AVStream *st = s->streams[avi->stream_index];
1497 27447 FFStream *const sti = ffstream(st);
1498 27447 AVIStream *ast = st->priv_data;
1499 27447 int dv_demux = CONFIG_DV_DEMUXER && avi->dv_demux;
1500 int size, err;
1501
1502
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 27447 times.
 27447 if (get_subtitle_pkt(s, st, pkt))
1503 ✗ return 0;
1504
1505 // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
1506
2/2
✓ Branch 0 taken 24064 times.
✓ Branch 1 taken 3383 times.
 27447 if (ast->sample_size <= 1)
1507 24064 size = INT_MAX;
1508
2/2
✓ Branch 0 taken 239 times.
✓ Branch 1 taken 3144 times.
 3383 else if (ast->sample_size < 32)
1509 // arbitrary multiplier to avoid tiny packets for raw PCM data
1510 239 size = 1024 * ast->sample_size;
1511 else
1512 3144 size = ast->sample_size;
1513
1514
2/2
✓ Branch 0 taken 24076 times.
✓ Branch 1 taken 3371 times.
 27447 if (size > ast->remaining)
1515 24076 size = ast->remaining;
1516 27447 avi->last_pkt_pos = avio_tell(pb);
1517 27447 err = av_get_packet(pb, pkt, size);
1518
2/2
✓ Branch 0 taken 38 times.
✓ Branch 1 taken 27409 times.
 27447 if (err < 0)
1519 38 return err;
1520 27409 size = err;
1521
1522
4/6
✓ Branch 0 taken 19 times.
✓ Branch 1 taken 27390 times.
✓ Branch 2 taken 19 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 19 times.
✗ Branch 5 not taken.
 27409 if (ast->has_pal && pkt->size < (unsigned)INT_MAX / 2 && !dv_demux) {
1523 uint8_t *pal;
1524 19 pal = av_packet_new_side_data(pkt,
1525 AV_PKT_DATA_PALETTE,
1526 AVPALETTE_SIZE);
1527
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 19 times.
 19 if (!pal) {
1528 ✗ av_log(s, AV_LOG_ERROR,
1529 "Failed to allocate data for palette\n");
1530 } else {
1531 19 memcpy(pal, ast->pal, AVPALETTE_SIZE);
1532 19 ast->has_pal = 0;
1533 }
1534 }
1535
1536
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 27409 times.
 27409 if (CONFIG_DV_DEMUXER && dv_demux) {
1537 ✗ size = avpriv_dv_produce_packet(avi->dv_demux, pkt,
1538 pkt->data, pkt->size, pkt->pos);
1539 ✗ pkt->flags |= AV_PKT_FLAG_KEY;
1540 ✗ if (size < 0)
1541 ✗ av_packet_unref(pkt);
1542
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 27409 times.
 27409 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE &&
1543 ✗ !st->codecpar->codec_tag && read_gab2_sub(s, st, pkt)) {
1544 ✗ ast->frame_offset++;
1545 ✗ avi->stream_index = -1;
1546 ✗ ast->remaining = 0;
1547 ✗ goto resync;
1548 } else {
1549 /* XXX: How to handle B-frames in AVI? */
1550 27409 pkt->dts = ast->frame_offset;
1551 // pkt->dts += ast->start;
1552
2/2
✓ Branch 0 taken 3752 times.
✓ Branch 1 taken 23657 times.
 27409 if (ast->sample_size)
1553 3752 pkt->dts /= ast->sample_size;
1554 27409 pkt->stream_index = avi->stream_index;
1555
1556
3/4
✓ Branch 0 taken 23232 times.
✓ Branch 1 taken 4177 times.
✓ Branch 2 taken 23232 times.
✗ Branch 3 not taken.
 50641 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && sti->index_entries) {
1557 AVIndexEntry *e;
1558 int index;
1559
1560 23232 index = av_index_search_timestamp(st, ast->frame_offset, AVSEEK_FLAG_ANY);
1561 23232 e = &sti->index_entries[index];
1562
1563
4/4
✓ Branch 0 taken 23119 times.
✓ Branch 1 taken 113 times.
✓ Branch 2 taken 21784 times.
✓ Branch 3 taken 1335 times.
 23232 if (index >= 0 && e->timestamp == ast->frame_offset) {
1564
2/2
✓ Branch 0 taken 2660 times.
✓ Branch 1 taken 19124 times.
 21784 if (index == sti->nb_index_entries-1) {
1565 2660 int key=1;
1566 2660 uint32_t state=-1;
1567
2/2
✓ Branch 0 taken 52 times.
✓ Branch 1 taken 2608 times.
 2660 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4) {
1568 52 const uint8_t *ptr = pkt->data, *end = ptr + FFMIN(size, 256);
1569
1/2
✓ Branch 0 taken 109 times.
✗ Branch 1 not taken.
 109 while (ptr < end) {
1570 109 ptr = avpriv_find_start_code(ptr, end, &state);
1571
3/4
✓ Branch 0 taken 52 times.
✓ Branch 1 taken 57 times.
✓ Branch 2 taken 52 times.
✗ Branch 3 not taken.
 109 if (state == 0x1B6 && ptr < end) {
1572 52 key = !(*ptr & 0xC0);
1573 52 break;
1574 }
1575 }
1576 }
1577
2/2
✓ Branch 0 taken 39 times.
✓ Branch 1 taken 2621 times.
 2660 if (!key)
1578 39 e->flags &= ~AVINDEX_KEYFRAME;
1579 }
1580
2/2
✓ Branch 0 taken 12726 times.
✓ Branch 1 taken 9058 times.
 21784 if (e->flags & AVINDEX_KEYFRAME)
1581 12726 pkt->flags |= AV_PKT_FLAG_KEY;
1582 }
1583 } else {
1584 4177 pkt->flags |= AV_PKT_FLAG_KEY;
1585 }
1586 27409 ast->frame_offset += get_duration(ast, pkt->size);
1587 }
1588 27409 ast->remaining -= err;
1589
2/2
✓ Branch 0 taken 27160 times.
✓ Branch 1 taken 249 times.
 27409 if (!ast->remaining) {
1590 27160 avi->stream_index = -1;
1591 27160 ast->packet_size = 0;
1592 }
1593
1594
6/6
✓ Branch 0 taken 26651 times.
✓ Branch 1 taken 758 times.
✓ Branch 2 taken 25204 times.
✓ Branch 3 taken 1447 times.
✓ Branch 4 taken 1 times.
✓ Branch 5 taken 25203 times.
 27409 if (!avi->non_interleaved && pkt->pos >= 0 && ast->seek_pos > pkt->pos) {
1595 1 av_packet_unref(pkt);
1596 1 goto resync;
1597 }
1598 27408 ast->seek_pos= 0;
1599
1600
6/6
✓ Branch 0 taken 26650 times.
✓ Branch 1 taken 758 times.
✓ Branch 2 taken 26548 times.
✓ Branch 3 taken 102 times.
✓ Branch 4 taken 23494 times.
✓ Branch 5 taken 3054 times.
 27408 if (!avi->non_interleaved && sti->nb_index_entries > 1 && avi->index_loaded > 1) {
1601 23494 int64_t dts= av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q);
1602
1603
2/2
✓ Branch 0 taken 22801 times.
✓ Branch 1 taken 693 times.
 23494 if (avi->dts_max < dts) {
1604 22801 avi->dts_max = dts;
1605
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 693 times.
 693 } else if (avi->dts_max - (uint64_t)dts > 2*AV_TIME_BASE) {
1606 ✗ avi->non_interleaved= 1;
1607 ✗ av_log(s, AV_LOG_INFO, "Switching to NI mode, due to poor interleaving\n");
1608 }
1609 }
1610
1611 27408 return 0;
1612 }
1613
1614
2/2
✓ Branch 1 taken 487 times.
✓ Branch 2 taken 26615 times.
 27102 if ((err = avi_sync(s, 0)) < 0)
1615 487 return err;
1616 26615 goto resync;
1617 }
1618
1619 /* XXX: We make the implicit supposition that the positions are sorted
1620 * for each stream. */
1621 432 static int avi_read_idx1(AVFormatContext *s, int size)
1622 {
1623 432 AVIContext *avi = s->priv_data;
1624 432 AVIOContext *pb = s->pb;
1625 int nb_index_entries, i;
1626 AVStream *st;
1627 AVIStream *ast;
1628 int64_t pos;
1629 432 unsigned int index, tag, flags, len, first_packet = 1;
1630 432 int64_t last_pos = -1;
1631 432 unsigned last_idx = -1;
1632 432 int64_t idx1_pos, first_packet_pos = 0, data_offset = 0;
1633 432 int anykey = 0;
1634
1635 432 nb_index_entries = size / 16;
1636
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 432 times.
 432 if (nb_index_entries <= 0)
1637 ✗ return AVERROR_INVALIDDATA;
1638
1639 432 idx1_pos = avio_tell(pb);
1640 432 avio_seek(pb, avi->movi_list + 4, SEEK_SET);
1641
1/2
✓ Branch 1 taken 432 times.
✗ Branch 2 not taken.
 432 if (avi_sync(s, 1) == 0)
1642 432 first_packet_pos = avio_tell(pb) - 8;
1643 432 avi->stream_index = -1;
1644 432 avio_seek(pb, idx1_pos, SEEK_SET);
1645
1646
3/4
✓ Branch 0 taken 411 times.
✓ Branch 1 taken 21 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 411 times.
 432 if (s->nb_streams == 1 && s->streams[0]->codecpar->codec_tag == AV_RL32("MMES")) {
1647 ✗ first_packet_pos = 0;
1648 ✗ data_offset = avi->movi_list;
1649 }
1650
1651 /* Read the entries and sort them in each stream component. */
1652
2/2
✓ Branch 0 taken 28045 times.
✓ Branch 1 taken 432 times.
 28477 for (i = 0; i < nb_index_entries; i++) {
1653
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 28045 times.
 28045 if (avio_feof(pb))
1654 ✗ return -1;
1655
1656 28045 tag = avio_rl32(pb);
1657 28045 flags = avio_rl32(pb);
1658 28045 pos = avio_rl32(pb);
1659 28045 len = avio_rl32(pb);
1660 28045 av_log(s, AV_LOG_TRACE, "%d: tag=0x%x flags=0x%x pos=0x%"PRIx64" len=%d/",
1661 i, tag, flags, pos, len);
1662
1663 28045 index = ((tag & 0xff) - '0') * 10;
1664 28045 index += (tag >> 8 & 0xff) - '0';
1665
2/2
✓ Branch 0 taken 290 times.
✓ Branch 1 taken 27755 times.
 28045 if (index >= s->nb_streams)
1666 290 continue;
1667 27755 st = s->streams[index];
1668 27755 ast = st->priv_data;
1669
1670 /* Skip 'xxpc' palette change entries in the index until a logic
1671 * to process these is properly implemented. */
1672
3/4
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 27753 times.
✓ Branch 2 taken 2 times.
✗ Branch 3 not taken.
 27755 if ((tag >> 16 & 0xff) == 'p' && (tag >> 24 & 0xff) == 'c')
1673 2 continue;
1674
1675
3/4
✓ Branch 0 taken 432 times.
✓ Branch 1 taken 27321 times.
✓ Branch 2 taken 432 times.
✗ Branch 3 not taken.
 27753 if (first_packet && first_packet_pos) {
1676
3/4
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 431 times.
✓ Branch 2 taken 1 times.
✗ Branch 3 not taken.
 432 if (avi->movi_list + 4 != pos || pos + 500 > first_packet_pos)
1677 432 data_offset = first_packet_pos - pos;
1678 432 first_packet = 0;
1679 }
1680 27753 pos += data_offset;
1681
1682 27753 av_log(s, AV_LOG_TRACE, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
1683
1684 // even if we have only a single stream, we should
1685 // switch to non-interleaved to get correct timestamps
1686
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 27753 times.
 27753 if (last_pos == pos)
1687 ✗ avi->non_interleaved = 1;
1688
3/4
✓ Branch 0 taken 27753 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 25524 times.
✓ Branch 3 taken 2229 times.
 27753 if (last_idx != pos && len) {
1689 25524 av_add_index_entry(st, pos, ast->cum_len, len, 0,
1690 25524 (flags & AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
1691 25524 last_idx= pos;
1692 }
1693 27753 ast->cum_len += get_duration(ast, len);
1694 27753 last_pos = pos;
1695 27753 anykey |= flags&AVIIF_INDEX;
1696 }
1697
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 432 if (!anykey) {
1698
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 2 for (index = 0; index < s->nb_streams; index++) {
1699 1 FFStream *const sti = ffstream(s->streams[index]);
1700
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 1 if (sti->nb_index_entries)
1701 1 sti->index_entries[0].flags |= AVINDEX_KEYFRAME;
1702 }
1703 }
1704 432 return 0;
1705 }
1706
1707 /* Scan the index and consider any file with streams more than
1708 * 2 seconds or 64MB apart non-interleaved. */
1709 471 static int check_stream_max_drift(AVFormatContext *s)
1710 {
1711 int64_t min_pos, pos;
1712 int i;
1713 471 int *idx = av_calloc(s->nb_streams, sizeof(*idx));
1714
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 471 if (!idx)
1715 ✗ return AVERROR(ENOMEM);
1716
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 31536 for (min_pos = pos = 0; min_pos != INT64_MAX; pos = min_pos + 1ULL) {
1717 31065 int64_t max_dts = INT64_MIN / 2;
1718 31065 int64_t min_dts = INT64_MAX / 2;
1719 31065 int64_t max_buffer = 0;
1720
1721 31065 min_pos = INT64_MAX;
1722
1723
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 70608 for (i = 0; i < s->nb_streams; i++) {
1724 39543 AVStream *st = s->streams[i];
1725 39543 AVIStream *ast = st->priv_data;
1726 39543 FFStream *const sti = ffstream(st);
1727 39543 int n = sti->nb_index_entries;
1728
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 70137 while (idx[i] < n && sti->index_entries[idx[i]].pos < pos)
1729 30594 idx[i]++;
1730
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 39543 if (idx[i] < n) {
1731 int64_t dts;
1732 38789 dts = av_rescale_q(sti->index_entries[idx[i]].timestamp /
1733 38789 FFMAX(ast->sample_size, 1),
1734 38789 st->time_base, AV_TIME_BASE_Q);
1735 38789 min_dts = FFMIN(min_dts, dts);
1736 38789 min_pos = FFMIN(min_pos, sti->index_entries[idx[i]].pos);
1737 }
1738 }
1739
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 70608 for (i = 0; i < s->nb_streams; i++) {
1740 39543 AVStream *st = s->streams[i];
1741 39543 FFStream *const sti = ffstream(st);
1742 39543 AVIStream *ast = st->priv_data;
1743
1744
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 39543 if (idx[i] && min_dts != INT64_MAX / 2) {
1745 int64_t dts, delta_dts;
1746 38382 dts = av_rescale_q(sti->index_entries[idx[i] - 1].timestamp /
1747 38382 FFMAX(ast->sample_size, 1),
1748 38382 st->time_base, AV_TIME_BASE_Q);
1749 38382 delta_dts = av_sat_sub64(dts, min_dts);
1750 38382 max_dts = FFMAX(max_dts, dts);
1751 38382 max_buffer = FFMAX(max_buffer,
1752 av_rescale(delta_dts,
1753 st->codecpar->bit_rate,
1754 AV_TIME_BASE));
1755 }
1756 }
1757
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 31065 if (av_sat_sub64(max_dts, min_dts) > 2 * AV_TIME_BASE ||
1758 max_buffer > 1024 * 1024 * 8 * 8) {
1759 ✗ av_free(idx);
1760 ✗ return 1;
1761 }
1762 }
1763 471 av_free(idx);
1764 471 return 0;
1765 }
1766
1767 476 static int guess_ni_flag(AVFormatContext *s)
1768 {
1769 int i;
1770 476 int64_t last_start = 0;
1771 476 int64_t first_end = INT64_MAX;
1772 476 int64_t oldpos = avio_tell(s->pb);
1773
1774
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 996 for (i = 0; i < s->nb_streams; i++) {
1775 520 AVStream *st = s->streams[i];
1776 520 FFStream *const sti = ffstream(st);
1777 520 int n = sti->nb_index_entries;
1778 unsigned int size;
1779
1780
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 520 if (n <= 0)
1781 60 continue;
1782
1783
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 460 if (n >= 2) {
1784 419 int64_t pos = sti->index_entries[0].pos;
1785 unsigned tag[2];
1786 419 avio_seek(s->pb, pos, SEEK_SET);
1787 419 tag[0] = avio_r8(s->pb);
1788 419 tag[1] = avio_r8(s->pb);
1789 419 avio_rl16(s->pb);
1790 419 size = avio_rl32(s->pb);
1791
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 419 if (get_stream_idx(tag) == i && pos + size > sti->index_entries[1].pos)
1792 ✗ last_start = INT64_MAX;
1793
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 419 if (get_stream_idx(tag) == i && size == sti->index_entries[0].size + 8)
1794 ✗ last_start = INT64_MAX;
1795 }
1796
1797
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 460 if (sti->index_entries[0].pos > last_start)
1798 450 last_start = sti->index_entries[0].pos;
1799
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 460 if (sti->index_entries[n - 1].pos < first_end)
1800 447 first_end = sti->index_entries[n - 1].pos;
1801 }
1802 476 avio_seek(s->pb, oldpos, SEEK_SET);
1803
1804
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 476 if (last_start > first_end)
1805 5 return 1;
1806
1807 471 return check_stream_max_drift(s);
1808 }
1809
1810 470 static int avi_load_index(AVFormatContext *s)
1811 {
1812 470 AVIContext *avi = s->priv_data;
1813 470 AVIOContext *pb = s->pb;
1814 uint32_t tag, size;
1815 470 int64_t pos = avio_tell(pb);
1816 int64_t next;
1817 470 int ret = -1;
1818
1819
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 470 if (avio_seek(pb, avi->movi_end, SEEK_SET) < 0)
1820 ✗ goto the_end; // maybe truncated file
1821 470 av_log(s, AV_LOG_TRACE, "movi_end=0x%"PRIx64"\n", avi->movi_end);
1822 for (;;) {
1823 911 tag = avio_rl32(pb);
1824 911 size = avio_rl32(pb);
1825
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 911 if (avio_feof(pb))
1826 448 break;
1827 463 next = avio_tell(pb);
1828
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 463 if (next < 0 || next > INT64_MAX - size - (size & 1))
1829 break;
1830 463 next += size + (size & 1LL);
1831
1832
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 895 if (tag == MKTAG('i', 'd', 'x', '1') &&
1833 432 avi_read_idx1(s, size) >= 0) {
1834 432 avi->index_loaded=2;
1835 432 ret = 0;
1836
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 31 }else if (tag == MKTAG('L', 'I', 'S', 'T')) {
1837 9 uint32_t tag1 = avio_rl32(pb);
1838
1839
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 9 if (tag1 == MKTAG('I', 'N', 'F', 'O'))
1840 5 ff_read_riff_info(s, size - 4);
1841
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 22 }else if (!ret)
1842 22 break;
1843
1844
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 441 if (avio_seek(pb, next, SEEK_SET) < 0)
1845 ✗ break; // something is wrong here
1846 }
1847
1848 ✗ the_end:
1849 470 avio_seek(pb, pos, SEEK_SET);
1850 470 return ret;
1851 }
1852
1853 ✗ static void seek_subtitle(AVStream *st, AVStream *st2, int64_t timestamp)
1854 {
1855 ✗ AVIStream *ast2 = st2->priv_data;
1856 ✗ int64_t ts2 = av_rescale_q(timestamp, st->time_base, st2->time_base);
1857 ✗ av_packet_unref(ast2->sub_pkt);
1858 ✗ if (avformat_seek_file(ast2->sub_ctx, 0, INT64_MIN, ts2, ts2, 0) >= 0 ||
1859 ✗ avformat_seek_file(ast2->sub_ctx, 0, ts2, ts2, INT64_MAX, 0) >= 0)
1860 ✗ ff_read_packet(ast2->sub_ctx, ast2->sub_pkt);
1861 ✗ }
1862
1863 728 static int avi_read_seek(AVFormatContext *s, int stream_index,
1864 int64_t timestamp, int flags)
1865 {
1866 728 AVIContext *avi = s->priv_data;
1867 AVStream *st;
1868 FFStream *sti;
1869 int i, index;
1870 int64_t pos, pos_min;
1871 AVIStream *ast;
1872
1873 /* Does not matter which stream is requested dv in avi has the
1874 * stream information in the first video stream.
1875 */
1876
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 728 if (avi->dv_demux)
1877 ✗ stream_index = 0;
1878
1879
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 728 if (!avi->index_loaded) {
1880 /* we only load the index on demand */
1881 ✗ avi_load_index(s);
1882 ✗ avi->index_loaded |= 1;
1883 }
1884
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 728 av_assert0(stream_index >= 0);
1885
1886 728 st = s->streams[stream_index];
1887 728 sti = ffstream(st);
1888 728 ast = st->priv_data;
1889
1890
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 728 if (avi->dv_demux) {
1891 // index entries are in the AVI scale/rate timebase, which does
1892 // not match DV demuxer's stream timebase
1893 ✗ timestamp = av_rescale_q(timestamp, st->time_base,
1894 ✗ (AVRational){ ast->scale, ast->rate });
1895 } else
1896 728 timestamp *= FFMAX(ast->sample_size, 1);
1897
1898 728 index = av_index_search_timestamp(st, timestamp, flags);
1899
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 728 if (index < 0) {
1900
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 198 if (sti->nb_index_entries > 0)
1901 198 av_log(s, AV_LOG_DEBUG, "Failed to find timestamp %"PRId64 " in index %"PRId64 " .. %"PRId64 "\n",
1902 timestamp,
1903 198 sti->index_entries[0].timestamp,
1904 198 sti->index_entries[sti->nb_index_entries - 1].timestamp);
1905 198 return AVERROR_INVALIDDATA;
1906 }
1907
1908 /* find the position */
1909 530 pos = sti->index_entries[index].pos;
1910 530 timestamp = sti->index_entries[index].timestamp;
1911
1912 530 av_log(s, AV_LOG_TRACE, "XX %"PRId64" %d %"PRId64"\n",
1913 530 timestamp, index, sti->index_entries[index].timestamp);
1914
1915
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 530 if (CONFIG_DV_DEMUXER && avi->dv_demux) {
1916 /* One and only one real stream for DV in AVI, and it has video */
1917 /* offsets. Calling with other stream indexes should have failed */
1918 /* the av_index_search_timestamp call above. */
1919
1920 ✗ if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1921 ✗ return -1;
1922
1923 /* Feed the DV video stream version of the timestamp to the */
1924 /* DV demux so it can synthesize correct timestamps. */
1925 ✗ ff_dv_ts_reset(avi->dv_demux,
1926 ✗ av_rescale_q(timestamp, (AVRational){ ast->scale, ast->rate },
1927 st->time_base));
1928
1929 ✗ avi->stream_index = -1;
1930 ✗ return 0;
1931 }
1932 530 timestamp /= FFMAX(ast->sample_size, 1);
1933
1934 530 pos_min = pos;
1935
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 1077 for (i = 0; i < s->nb_streams; i++) {
1936 547 AVStream *st2 = s->streams[i];
1937 547 FFStream *const sti2 = ffstream(st2);
1938 547 AVIStream *ast2 = st2->priv_data;
1939
1940 547 ast2->packet_size =
1941 547 ast2->remaining = 0;
1942
1943
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 547 if (ast2->sub_ctx) {
1944 ✗ seek_subtitle(st, st2, timestamp);
1945 ✗ continue;
1946 }
1947
1948
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 547 if (sti2->nb_index_entries <= 0)
1949 ✗ continue;
1950
1951 // av_assert1(st2->codecpar->block_align);
1952 547 index = av_index_search_timestamp(st2,
1953 547 av_rescale_q(timestamp,
1954 st->time_base,
1955 st2->time_base) *
1956 547 FFMAX(ast2->sample_size, 1),
1957 547 flags |
1958 AVSEEK_FLAG_BACKWARD |
1959
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 547 (st2->codecpar->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
1960
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 547 if (index < 0)
1961 ✗ index = 0;
1962 547 ast2->seek_pos = sti2->index_entries[index].pos;
1963 547 pos_min = FFMIN(pos_min,ast2->seek_pos);
1964 }
1965
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 1077 for (i = 0; i < s->nb_streams; i++) {
1966 547 AVStream *st2 = s->streams[i];
1967 547 FFStream *const sti2 = ffstream(st2);
1968 547 AVIStream *ast2 = st2->priv_data;
1969
1970
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 547 if (ast2->sub_ctx || sti2->nb_index_entries <= 0)
1971 ✗ continue;
1972
1973 547 index = av_index_search_timestamp(
1974 st2,
1975 547 av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1),
1976
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 547 flags | AVSEEK_FLAG_BACKWARD | (st2->codecpar->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
1977
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 547 if (index < 0)
1978 ✗ index = 0;
1979
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 558 while (!avi->non_interleaved && index > 0 && sti2->index_entries[index-1].pos >= pos_min)
1980 11 index--;
1981 547 ast2->frame_offset = sti2->index_entries[index].timestamp;
1982 }
1983
1984 /* do the seek */
1985
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 530 if (avio_seek(s->pb, pos_min, SEEK_SET) < 0) {
1986 ✗ av_log(s, AV_LOG_ERROR, "Seek failed\n");
1987 ✗ return -1;
1988 }
1989 530 avi->stream_index = -1;
1990 530 avi->dts_max = INT_MIN;
1991 530 return 0;
1992 }
1993
1994 476 static int avi_read_close(AVFormatContext *s)
1995 {
1996 int i;
1997 476 AVIContext *avi = s->priv_data;
1998
1999
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 996 for (i = 0; i < s->nb_streams; i++) {
2000 520 AVStream *st = s->streams[i];
2001 520 AVIStream *ast = st->priv_data;
2002
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 520 if (ast) {
2003
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 520 if (ast->sub_ctx) {
2004 ✗ av_freep(&ast->sub_ctx->pb);
2005 ✗ avformat_close_input(&ast->sub_ctx);
2006 }
2007 520 av_buffer_unref(&ast->sub_buffer);
2008 520 av_packet_free(&ast->sub_pkt);
2009 }
2010 }
2011
2012 476 av_freep(&avi->dv_demux);
2013
2014 476 return 0;
2015 }
2016
2017 7260 static int avi_probe(const AVProbeData *p)
2018 {
2019 int i;
2020
2021 /* check file header */
2022
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 41203 for (i = 0; avi_headers[i][0]; i++)
2023
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 34416 if (AV_RL32(p->buf ) == AV_RL32(avi_headers[i] ) &&
2024
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✓ Branch 1 taken 2010 times.
 2483 AV_RL32(p->buf + 8) == AV_RL32(avi_headers[i] + 4))
2025 473 return AVPROBE_SCORE_MAX;
2026
2027 6787 return 0;
2028 }
2029
2030 const FFInputFormat ff_avi_demuxer = {
2031 .p.name = "avi",
2032 .p.long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
2033 .p.extensions = "avi",
2034 .p.priv_class = &demuxer_class,
2035 .priv_data_size = sizeof(AVIContext),
2036 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
2037 .read_probe = avi_probe,
2038 .read_header = avi_read_header,
2039 .read_packet = avi_read_packet,
2040 .read_close = avi_read_close,
2041 .read_seek = avi_read_seek,
2042 };
2043