FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/asfdec_o.c
Date: 2023-12-07 21:54:23
Exec Total Coverage
Lines: 4 950 0.4%
Functions: 1 40 2.5%
Branches: 2 574 0.3%
Line Branch Exec Source
1 /*
2 * Microsoft Advanced Streaming Format demuxer
3 * Copyright (c) 2014 Alexandra Hájková
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 <time.h>
23
24 #include "libavutil/attributes.h"
25 #include "libavutil/common.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/time_internal.h"
30
31 #include "avformat.h"
32 #include "avlanguage.h"
33 #include "demux.h"
34 #include "internal.h"
35 #include "riff.h"
36 #include "asf.h"
37 #include "asfcrypt.h"
38
39 #define ASF_BOOL 0x2
40 #define ASF_WORD 0x5
41 #define ASF_GUID 0x6
42 #define ASF_DWORD 0x3
43 #define ASF_QWORD 0x4
44 #define ASF_UNICODE 0x0
45 #define ASF_FLAG_BROADCAST 0x1
46 #define ASF_BYTE_ARRAY 0x1
47 #define ASF_TYPE_AUDIO 0x2
48 #define ASF_TYPE_VIDEO 0x1
49 #define ASF_STREAM_NUM 0x7F
50 #define ASF_MAX_STREAMS 128
51 #define BMP_HEADER_SIZE 40
52 #define ASF_NUM_OF_PAYLOADS 0x3F
53 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
54 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
55
56 typedef struct GUIDParseTable {
57 const char *name;
58 ff_asf_guid guid;
59 int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
60 int is_subobject;
61 } GUIDParseTable;
62
63 typedef struct ASFPacket {
64 AVPacket *avpkt;
65 int64_t dts;
66 uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
67 int flags;
68 int data_size;
69 int duration;
70 int size_left;
71 uint8_t stream_index;
72 } ASFPacket;
73
74 typedef struct ASFStream {
75 uint8_t stream_index; // from packet header
76 int index; // stream index in AVFormatContext, set in asf_read_stream_properties
77 int type;
78 int indexed; // added index entries from the Simple Index Object or not
79 int8_t span; // for deinterleaving
80 uint16_t virtual_pkt_len;
81 uint16_t virtual_chunk_len;
82 int16_t lang_idx;
83 ASFPacket pkt;
84 } ASFStream;
85
86 typedef struct ASFStreamData{
87 char langs[32];
88 AVDictionary *asf_met; // for storing per-stream metadata
89 AVRational aspect_ratio;
90 } ASFStreamData;
91
92 typedef struct ASFContext {
93 int data_reached;
94 int is_simple_index; // is simple index present or not 1/0
95 int is_header;
96
97 uint64_t preroll;
98 uint64_t nb_packets; // ASF packets
99 uint32_t packet_size;
100 int64_t send_time;
101 int duration;
102
103 uint32_t b_flags; // flags with broadcast flag
104 uint32_t prop_flags; // file properties object flags
105
106 uint64_t data_size; // data object size
107 uint64_t unknown_size; // size of the unknown object
108
109 int64_t offset; // offset of the current object
110
111 int64_t data_offset;
112 int64_t first_packet_offset; // packet offset
113 int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
114 int in_asf_read_unknown;
115
116 // ASF file must not contain more than 128 streams according to the specification
117 ASFStream *asf_st[ASF_MAX_STREAMS];
118 ASFStreamData asf_sd[ASF_MAX_STREAMS];
119 int nb_streams;
120
121 int stream_index; // from packet header, for the subpayload case
122
123 // packet parameters
124 uint64_t sub_header_offset; // offset of subpayload header
125 int64_t sub_dts;
126 uint8_t dts_delta; // for subpayloads
127 uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
128 int64_t packet_offset; // offset of the current packet inside Data Object
129 uint32_t pad_len; // padding after payload
130 uint32_t rep_data_len;
131
132 // packet state
133 uint64_t sub_left; // subpayloads left or not
134 unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
135 uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
136 uint64_t nb_mult_left; // multiple payloads left
137 int return_subpayload;
138 enum {
139 PARSE_PACKET_HEADER,
140 READ_SINGLE,
141 READ_MULTI,
142 READ_MULTI_SUB
143 } state;
144 } ASFContext;
145
146 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
147 static const GUIDParseTable *find_guid(ff_asf_guid guid);
148
149 6956 static int asf_probe(const AVProbeData *pd)
150 {
151 /* check file header */
152
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✓ Branch 1 taken 33 times.
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 6956 if (!ff_guidcmp(pd->buf, &ff_asf_header))
153 33 return AVPROBE_SCORE_MAX/2;
154 else
155 6923 return 0;
156 }
157
158 ✗ static void swap_guid(ff_asf_guid guid)
159 {
160 ✗ FFSWAP(unsigned char, guid[0], guid[3]);
161 ✗ FFSWAP(unsigned char, guid[1], guid[2]);
162 ✗ FFSWAP(unsigned char, guid[4], guid[5]);
163 ✗ FFSWAP(unsigned char, guid[6], guid[7]);
164 ✗ }
165
166 ✗ static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
167 {
168 ✗ if (size < INT64_MAX - offset && avio_tell(pb) != offset + size)
169 ✗ avio_seek(pb, offset + size, SEEK_SET);
170 ✗ }
171
172 ✗ static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
173 {
174 ✗ ASFContext *asf = s->priv_data;
175 ✗ AVIOContext *pb = s->pb;
176 ✗ uint64_t size = avio_rl64(pb);
177 int ret;
178
179 ✗ if (size > INT64_MAX || asf->in_asf_read_unknown > 5)
180 ✗ return AVERROR_INVALIDDATA;
181
182 ✗ if (asf->is_header)
183 ✗ asf->unknown_size = size;
184 ✗ asf->is_header = 0;
185 ✗ if (!g->is_subobject) {
186 ✗ if (!(ret = strcmp(g->name, "Header Extension")))
187 ✗ avio_skip(pb, 22); // skip reserved fields and Data Size
188 ✗ asf->in_asf_read_unknown ++;
189 ✗ ret = detect_unknown_subobject(s, asf->unknown_offset,
190 ✗ asf->unknown_size);
191 ✗ asf->in_asf_read_unknown --;
192 ✗ if (ret < 0)
193 ✗ return ret;
194 } else {
195 ✗ if (size < 24) {
196 ✗ av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size);
197 ✗ return AVERROR_INVALIDDATA;
198 }
199 ✗ avio_skip(pb, size - 24);
200 }
201
202 ✗ return 0;
203 }
204
205 ✗ static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
206 {
207 ✗ char *q = buf;
208 ✗ int ret = 0;
209 ✗ if (buflen <= 0)
210 ✗ return AVERROR(EINVAL);
211 ✗ while (ret + 1 < maxlen) {
212 uint8_t tmp;
213 uint32_t ch;
214 ✗ GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
215 ✗ PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
216 }
217 ✗ *q = 0;
218
219 ✗ return ret;
220 }
221
222 ✗ static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
223 {
224 ✗ ASFContext *asf = s->priv_data;
225 ✗ AVIOContext *pb = s->pb;
226 ✗ uint64_t size = avio_rl64(pb);
227 int i, nb_markers, ret;
228 size_t len;
229 char name[1024];
230
231 ✗ avio_skip(pb, 8);
232 ✗ avio_skip(pb, 8); // skip reserved GUID
233 ✗ nb_markers = avio_rl32(pb);
234 ✗ avio_skip(pb, 2); // skip reserved field
235 ✗ len = avio_rl16(pb);
236 ✗ for (i = 0; i < len; i++)
237 ✗ avio_skip(pb, 1);
238
239 ✗ for (i = 0; i < nb_markers; i++) {
240 int64_t pts;
241
242 ✗ avio_skip(pb, 8);
243 ✗ pts = avio_rl64(pb);
244 ✗ pts -= asf->preroll * 10000;
245 ✗ avio_skip(pb, 2); // entry length
246 ✗ avio_skip(pb, 4); // send time
247 ✗ avio_skip(pb, 4); // flags
248 ✗ len = avio_rl32(pb);
249
250 ✗ if (avio_feof(pb))
251 ✗ return AVERROR_INVALIDDATA;
252
253 ✗ if ((ret = avio_get_str16le(pb, len, name,
254 sizeof(name))) < len)
255 ✗ avio_skip(pb, len - ret);
256 ✗ avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
257 AV_NOPTS_VALUE, name);
258 }
259 ✗ align_position(pb, asf->offset, size);
260
261 ✗ return 0;
262 }
263
264 ✗ static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
265 unsigned char *ch, uint16_t buflen)
266 {
267 ✗ AVIOContext *pb = s->pb;
268
269 ✗ avio_get_str16le(pb, len, ch, buflen);
270 ✗ if (ch[0]) {
271 ✗ if (av_dict_set(&s->metadata, title, ch, 0) < 0)
272 ✗ av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
273 }
274
275 ✗ return 0;
276 }
277
278 ✗ static int asf_read_value(AVFormatContext *s, const uint8_t *name,
279 uint16_t val_len, int type, AVDictionary **met)
280 {
281 int ret;
282 uint8_t *value;
283 ✗ uint16_t buflen = 2 * val_len + 1;
284 ✗ AVIOContext *pb = s->pb;
285
286 ✗ value = av_malloc(buflen);
287 ✗ if (!value)
288 ✗ return AVERROR(ENOMEM);
289 ✗ if (type == ASF_UNICODE) {
290 // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
291 ✗ if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
292 ✗ goto failed;
293 ✗ if (av_dict_set(met, name, value, 0) < 0)
294 ✗ av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
295 } else {
296 char buf[256];
297 ✗ if (val_len > sizeof(buf)) {
298 ✗ ret = AVERROR_INVALIDDATA;
299 ✗ goto failed;
300 }
301 ✗ if ((ret = avio_read(pb, value, val_len)) < 0)
302 ✗ goto failed;
303 ✗ if (ret < 2 * val_len)
304 ✗ value[ret] = '\0';
305 else
306 ✗ value[2 * val_len - 1] = '\0';
307 ✗ snprintf(buf, sizeof(buf), "%s", value);
308 ✗ if (av_dict_set(met, name, buf, 0) < 0)
309 ✗ av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
310 }
311 ✗ av_freep(&value);
312
313 ✗ return 0;
314
315 ✗ failed:
316 ✗ av_freep(&value);
317 ✗ return ret;
318 }
319 ✗ static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
320 {
321
322 ✗ switch (type) {
323 ✗ case ASF_BOOL:
324 ✗ *value = avio_rl16(pb);
325 ✗ break;
326 ✗ case ASF_DWORD:
327 ✗ *value = avio_rl32(pb);
328 ✗ break;
329 ✗ case ASF_QWORD:
330 ✗ *value = avio_rl64(pb);
331 ✗ break;
332 ✗ case ASF_WORD:
333 ✗ *value = avio_rl16(pb);
334 ✗ break;
335 ✗ default:
336 ✗ return AVERROR_INVALIDDATA;
337 }
338
339 ✗ return 0;
340 }
341
342 ✗ static int asf_set_metadata(AVFormatContext *s, const uint8_t *name,
343 int type, AVDictionary **met)
344 {
345 ✗ AVIOContext *pb = s->pb;
346 uint64_t value;
347 char buf[32];
348 int ret;
349
350 ✗ ret = asf_read_generic_value(pb, type, &value);
351 ✗ if (ret < 0)
352 ✗ return ret;
353
354 ✗ snprintf(buf, sizeof(buf), "%"PRIu64, value);
355 ✗ if (av_dict_set(met, name, buf, 0) < 0)
356 ✗ av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
357
358 ✗ return 0;
359 }
360
361 ✗ static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
362 uint16_t val_len, uint16_t type, AVDictionary **met)
363 {
364 int ret;
365 ff_asf_guid guid;
366
367 ✗ if (val_len) {
368 ✗ switch (type) {
369 ✗ case ASF_UNICODE:
370 ✗ asf_read_value(s, name, val_len, type, met);
371 ✗ break;
372 ✗ case ASF_BYTE_ARRAY:
373 ✗ if (ff_asf_handle_byte_array(s, name, val_len) > 0)
374 ✗ asf_read_value(s, name, val_len, type, met);
375 ✗ break;
376 ✗ case ASF_GUID:
377 ✗ ff_get_guid(s->pb, &guid);
378 ✗ break;
379 ✗ default:
380 ✗ if ((ret = asf_set_metadata(s, name, type, met)) < 0)
381 ✗ return ret;
382 ✗ break;
383 }
384 }
385
386 ✗ return 0;
387 }
388
389 ✗ static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
390 {
391 ✗ ASFContext *asf = s->priv_data;
392 ✗ AVIOContext *pb = s->pb;
393 ✗ uint64_t size = avio_rl64(pb);
394 ✗ uint16_t nb_desc = avio_rl16(pb);
395 int i, ret;
396
397 ✗ for (i = 0; i < nb_desc; i++) {
398 uint16_t name_len, type, val_len;
399 ✗ uint8_t *name = NULL;
400
401 ✗ name_len = avio_rl16(pb);
402 ✗ if (!name_len)
403 ✗ return AVERROR_INVALIDDATA;
404 ✗ name = av_malloc(name_len);
405 ✗ if (!name)
406 ✗ return AVERROR(ENOMEM);
407 ✗ avio_get_str16le(pb, name_len, name,
408 name_len);
409 ✗ type = avio_rl16(pb);
410 // BOOL values are 16 bits long in the Metadata Object
411 // but 32 bits long in the Extended Content Description Object
412 ✗ if (type == ASF_BOOL)
413 ✗ type = ASF_DWORD;
414 ✗ val_len = avio_rl16(pb);
415
416 ✗ ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
417 ✗ av_freep(&name);
418 ✗ if (ret < 0)
419 ✗ return ret;
420 }
421
422 ✗ align_position(pb, asf->offset, size);
423 ✗ return 0;
424 }
425
426 ✗ static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
427 {
428 ✗ AVStream *st = NULL;
429 ✗ ASFContext *asf = s->priv_data;
430 int i;
431
432 ✗ for (i = 0; i < asf->nb_streams; i++) {
433 ✗ if (asf->asf_st[i]->stream_index == st_num) {
434 ✗ st = s->streams[asf->asf_st[i]->index];
435 ✗ break;
436 }
437 }
438
439 ✗ return st;
440 }
441
442 ✗ static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
443 {
444 ✗ ASFContext *asf = s->priv_data;
445 ✗ AVIOContext *pb = s->pb;
446 ✗ uint64_t value = 0;
447 int ret;
448
449 ✗ ret = asf_read_generic_value(pb, type, &value);
450 ✗ if (ret < 0)
451 ✗ return ret;
452
453 ✗ if (st_num < ASF_MAX_STREAMS) {
454 ✗ if (!strcmp(name, "AspectRatioX"))
455 ✗ asf->asf_sd[st_num].aspect_ratio.num = value;
456 else
457 ✗ asf->asf_sd[st_num].aspect_ratio.den = value;
458 }
459 ✗ return 0;
460 }
461
462 ✗ static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
463 {
464 ✗ ASFContext *asf = s->priv_data;
465 ✗ AVIOContext *pb = s->pb;
466 ✗ uint64_t size = avio_rl64(pb);
467 ✗ uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
468 int i, ret;
469
470 ✗ for (i = 0; i < nb_recs; i++) {
471 uint16_t name_len, buflen, type, val_len, st_num;
472 ✗ uint8_t *name = NULL;
473
474 ✗ avio_skip(pb, 2); // skip reserved field
475 ✗ st_num = avio_rl16(pb);
476 ✗ name_len = avio_rl16(pb);
477 ✗ buflen = 2 * name_len + 1;
478 ✗ if (!name_len)
479 ✗ break;
480 ✗ type = avio_rl16(pb);
481 ✗ val_len = avio_rl32(pb);
482 ✗ name = av_malloc(buflen);
483 ✗ if (!name)
484 ✗ return AVERROR(ENOMEM);
485 ✗ avio_get_str16le(pb, name_len, name,
486 buflen);
487 ✗ if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
488 ✗ ret = asf_store_aspect_ratio(s, st_num, name, type);
489 ✗ if (ret < 0) {
490 ✗ av_freep(&name);
491 ✗ break;
492 }
493 } else {
494 ✗ if (st_num < ASF_MAX_STREAMS) {
495 ✗ if ((ret = process_metadata(s, name, name_len, val_len, type,
496 ✗ st_num ? &asf->asf_sd[st_num].asf_met
497 : &s->metadata)) < 0) {
498 ✗ av_freep(&name);
499 ✗ break;
500 }
501 }
502 }
503 ✗ av_freep(&name);
504 }
505
506 ✗ align_position(pb, asf->offset, size);
507 ✗ return 0;
508 }
509
510 ✗ static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
511 {
512 ✗ ASFContext *asf = s->priv_data;
513 ✗ AVIOContext *pb = s->pb;
514 int i;
515 static const char *const titles[] =
516 { "Title", "Author", "Copyright", "Description", "Rate" };
517 ✗ uint16_t len[5], buflen[5] = { 0 };
518 uint8_t *ch;
519 ✗ uint64_t size = avio_rl64(pb);
520
521 ✗ for (i = 0; i < 5; i++) {
522 ✗ len[i] = avio_rl16(pb);
523 // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
524 ✗ buflen[i] = 2 * len[i] + 1;
525 }
526
527 ✗ for (i = 0; i < 5; i++) {
528 ✗ ch = av_malloc(buflen[i]);
529 ✗ if (!ch)
530 ✗ return(AVERROR(ENOMEM));
531 ✗ asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
532 ✗ av_freep(&ch);
533 }
534 ✗ align_position(pb, asf->offset, size);
535
536 ✗ return 0;
537 }
538
539 ✗ static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
540 {
541 ✗ ASFContext *asf = s->priv_data;
542 ✗ AVIOContext *pb = s->pb;
543 time_t creation_time;
544
545 ✗ avio_rl64(pb); // read object size
546 ✗ avio_skip(pb, 16); // skip File ID
547 ✗ avio_skip(pb, 8); // skip File size
548 ✗ creation_time = avio_rl64(pb);
549 ✗ if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
550 struct tm tmbuf;
551 struct tm *tm;
552 char buf[64];
553
554 // creation date is in 100 ns units from 1 Jan 1601, conversion to s
555 ✗ creation_time /= 10000000;
556 // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
557 ✗ creation_time -= 11644473600;
558 ✗ tm = gmtime_r(&creation_time, &tmbuf);
559 ✗ if (tm) {
560 ✗ if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
561 ✗ buf[0] = '\0';
562 } else
563 ✗ buf[0] = '\0';
564 ✗ if (buf[0]) {
565 ✗ if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
566 ✗ av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
567 }
568 }
569 ✗ asf->nb_packets = avio_rl64(pb);
570 ✗ asf->duration = avio_rl64(pb) / 10000; // stream duration
571 ✗ avio_skip(pb, 8); // skip send duration
572 ✗ asf->preroll = avio_rl64(pb);
573 ✗ asf->duration -= asf->preroll;
574 ✗ asf->b_flags = avio_rl32(pb);
575 ✗ avio_skip(pb, 4); // skip minimal packet size
576 ✗ asf->packet_size = avio_rl32(pb);
577 ✗ avio_skip(pb, 4); // skip max_bitrate
578
579 ✗ return 0;
580 }
581
582 ✗ static int parse_video_info(AVFormatContext *avfmt, AVIOContext *pb, AVStream *st)
583 {
584 uint16_t size_asf; // ASF-specific Format Data size
585 uint32_t size_bmp; // BMP_HEADER-specific Format Data size
586 unsigned int tag;
587
588 ✗ st->codecpar->width = avio_rl32(pb);
589 ✗ st->codecpar->height = avio_rl32(pb);
590 ✗ avio_skip(pb, 1); // skip reserved flags
591 ✗ size_asf = avio_rl16(pb);
592 ✗ tag = ff_get_bmp_header(pb, st, &size_bmp);
593 ✗ st->codecpar->codec_tag = tag;
594 ✗ st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
595 ✗ size_bmp = FFMAX(size_asf, size_bmp);
596
597 ✗ if (size_bmp > BMP_HEADER_SIZE) {
598 ✗ int ret = ff_get_extradata(avfmt, st->codecpar, pb, size_bmp - BMP_HEADER_SIZE);
599
600 ✗ if (ret < 0)
601 ✗ return ret;
602 }
603 ✗ return 0;
604 }
605
606 ✗ static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
607 {
608 ✗ ASFContext *asf = s->priv_data;
609 ✗ AVIOContext *pb = s->pb;
610 uint64_t size;
611 uint32_t err_data_len, ts_data_len; // type specific data length
612 uint16_t flags;
613 ff_asf_guid stream_type;
614 enum AVMediaType type;
615 int i, ret;
616 uint8_t stream_index;
617 AVStream *st;
618 ASFStream *asf_st;
619
620 // ASF file must not contain more than 128 streams according to the specification
621 ✗ if (asf->nb_streams >= ASF_MAX_STREAMS)
622 ✗ return AVERROR_INVALIDDATA;
623
624 ✗ size = avio_rl64(pb);
625 ✗ ff_get_guid(pb, &stream_type);
626 ✗ if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
627 ✗ type = AVMEDIA_TYPE_AUDIO;
628 ✗ else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
629 ✗ type = AVMEDIA_TYPE_VIDEO;
630 ✗ else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
631 ✗ type = AVMEDIA_TYPE_VIDEO;
632 ✗ else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
633 ✗ type = AVMEDIA_TYPE_DATA;
634 ✗ else if (!ff_guidcmp(&stream_type,
635 &ff_asf_ext_stream_embed_stream_header))
636 ✗ type = AVMEDIA_TYPE_UNKNOWN;
637 else
638 ✗ return AVERROR_INVALIDDATA;
639
640 ✗ ff_get_guid(pb, &stream_type); // error correction type
641 ✗ avio_skip(pb, 8); // skip the time offset
642 ✗ ts_data_len = avio_rl32(pb);
643 ✗ err_data_len = avio_rl32(pb);
644 ✗ flags = avio_rl16(pb); // bit 15 - Encrypted Content
645
646 ✗ stream_index = flags & ASF_STREAM_NUM;
647 ✗ for (i = 0; i < asf->nb_streams; i++)
648 ✗ if (stream_index == asf->asf_st[i]->stream_index) {
649 ✗ av_log(s, AV_LOG_WARNING,
650 "Duplicate stream found, this stream will be ignored.\n");
651 ✗ align_position(pb, asf->offset, size);
652 ✗ return 0;
653 }
654
655 ✗ st = avformat_new_stream(s, NULL);
656 ✗ if (!st)
657 ✗ return AVERROR(ENOMEM);
658 ✗ avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
659 ✗ st->codecpar->codec_type = type;
660 ✗ asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
661 ✗ if (!asf->asf_st[asf->nb_streams])
662 ✗ return AVERROR(ENOMEM);
663 ✗ asf_st = asf->asf_st[asf->nb_streams];
664 ✗ asf->nb_streams++;
665 ✗ asf_st->stream_index = stream_index;
666 ✗ asf_st->index = st->index;
667 ✗ asf_st->indexed = 0;
668 ✗ st->id = flags & ASF_STREAM_NUM;
669 ✗ asf_st->pkt.data_size = 0;
670 ✗ asf_st->pkt.avpkt = av_packet_alloc();
671 ✗ if (!asf_st->pkt.avpkt)
672 ✗ return AVERROR(ENOMEM);
673 ✗ avio_skip(pb, 4); // skip reserved field
674
675 ✗ switch (type) {
676 ✗ case AVMEDIA_TYPE_AUDIO:
677 ✗ asf_st->type = AVMEDIA_TYPE_AUDIO;
678 ✗ if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
679 ✗ return ret;
680 ✗ break;
681 ✗ case AVMEDIA_TYPE_VIDEO:
682 ✗ asf_st->type = AVMEDIA_TYPE_VIDEO;
683 ✗ if ((ret = parse_video_info(s, pb, st)) < 0)
684 ✗ return ret;
685 ✗ break;
686 ✗ default:
687 ✗ avio_skip(pb, ts_data_len);
688 ✗ break;
689 }
690
691 ✗ if (err_data_len) {
692 ✗ if (type == AVMEDIA_TYPE_AUDIO) {
693 ✗ uint8_t span = avio_r8(pb);
694 ✗ if (span > 1) {
695 ✗ asf_st->span = span;
696 ✗ asf_st->virtual_pkt_len = avio_rl16(pb);
697 ✗ asf_st->virtual_chunk_len = avio_rl16(pb);
698 ✗ if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
699 ✗ return AVERROR_INVALIDDATA;
700 ✗ avio_skip(pb, err_data_len - 5);
701 } else
702 ✗ avio_skip(pb, err_data_len - 1);
703 } else
704 ✗ avio_skip(pb, err_data_len);
705 }
706
707 ✗ align_position(pb, asf->offset, size);
708
709 ✗ return 0;
710 }
711
712 ✗ static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
713 {
714 // language abbr should contain at least 2 chars
715 ✗ if (rfc1766 && strlen(rfc1766) > 1) {
716 ✗ const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
717 ✗ const char *iso6392 = ff_convert_lang_to(primary_tag,
718 AV_LANG_ISO639_2_BIBL);
719 ✗ if (iso6392)
720 ✗ if (av_dict_set(met, "language", iso6392, 0) < 0)
721 ✗ av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
722 }
723 ✗ }
724
725 ✗ static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
726 {
727 ✗ ASFContext *asf = s->priv_data;
728 ✗ AVIOContext *pb = s->pb;
729 ✗ AVStream *st = NULL;
730 ff_asf_guid guid;
731 uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
732 int i, ret;
733 uint32_t bitrate;
734 uint64_t start_time, end_time, time_per_frame;
735 ✗ uint64_t size = avio_rl64(pb);
736
737 ✗ start_time = avio_rl64(pb);
738 ✗ end_time = avio_rl64(pb);
739 ✗ bitrate = avio_rl32(pb);
740 ✗ avio_skip(pb, 28); // skip some unused values
741 ✗ st_num = avio_rl16(pb);
742 ✗ st_num &= ASF_STREAM_NUM;
743 ✗ lang_idx = avio_rl16(pb); // Stream Language ID Index
744 ✗ if (lang_idx >= ASF_MAX_STREAMS)
745 ✗ return AVERROR_INVALIDDATA;
746 ✗ for (i = 0; i < asf->nb_streams; i++) {
747 ✗ if (st_num == asf->asf_st[i]->stream_index) {
748 ✗ st = s->streams[asf->asf_st[i]->index];
749 ✗ asf->asf_st[i]->lang_idx = lang_idx;
750 ✗ break;
751 }
752 }
753 ✗ time_per_frame = avio_rl64(pb); // average time per frame
754 ✗ if (st) {
755 ✗ st->start_time = start_time;
756 ✗ st->duration = end_time - start_time;
757 ✗ st->codecpar->bit_rate = bitrate;
758 ✗ st->avg_frame_rate.num = 10000000;
759 ✗ st->avg_frame_rate.den = time_per_frame;
760 }
761 ✗ nb_st_name = avio_rl16(pb);
762 ✗ nb_pay_exts = avio_rl16(pb);
763 ✗ for (i = 0; i < nb_st_name; i++) {
764 uint16_t len;
765
766 ✗ avio_rl16(pb); // Language ID Index
767 ✗ len = avio_rl16(pb);
768 ✗ avio_skip(pb, len);
769 }
770
771 ✗ for (i = 0; i < nb_pay_exts; i++) {
772 uint32_t len;
773 ✗ avio_skip(pb, 16); // Extension System ID
774 ✗ avio_skip(pb, 2); // Extension Data Size
775 ✗ len = avio_rl32(pb);
776 ✗ avio_skip(pb, len);
777 }
778
779 ✗ if ((ret = ff_get_guid(pb, &guid)) < 0) {
780 ✗ align_position(pb, asf->offset, size);
781
782 ✗ return 0;
783 }
784
785 ✗ g = find_guid(guid);
786 ✗ if (g && !(strcmp(g->name, "Stream Properties"))) {
787 ✗ if ((ret = g->read_object(s, g)) < 0)
788 ✗ return ret;
789 }
790
791 ✗ align_position(pb, asf->offset, size);
792 ✗ return 0;
793 }
794
795 ✗ static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
796 {
797 ✗ ASFContext *asf = s->priv_data;
798 ✗ AVIOContext *pb = s->pb;
799 int i, ret;
800 ✗ uint64_t size = avio_rl64(pb);
801 ✗ uint16_t nb_langs = avio_rl16(pb);
802
803 ✗ if (nb_langs < ASF_MAX_STREAMS) {
804 ✗ for (i = 0; i < nb_langs; i++) {
805 size_t len;
806 ✗ len = avio_r8(pb);
807 ✗ if (!len)
808 ✗ len = 6;
809 ✗ if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
810 sizeof(asf->asf_sd[i].langs))) < 0) {
811 ✗ return ret;
812 }
813 }
814 }
815
816 ✗ align_position(pb, asf->offset, size);
817 ✗ return 0;
818 }
819
820 // returns data object offset when reading this object for the first time
821 ✗ static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
822 {
823 ✗ ASFContext *asf = s->priv_data;
824 ✗ AVIOContext *pb = s->pb;
825 ✗ uint64_t size = asf->data_size = avio_rl64(pb);
826 int i;
827
828 ✗ if (!asf->data_reached) {
829 ✗ asf->data_reached = 1;
830 ✗ asf->data_offset = asf->offset;
831 }
832
833 ✗ for (i = 0; i < asf->nb_streams; i++) {
834 ✗ if (!(asf->b_flags & ASF_FLAG_BROADCAST))
835 ✗ s->streams[i]->duration = asf->duration;
836 }
837 ✗ asf->nb_mult_left = 0;
838 ✗ asf->sub_left = 0;
839 ✗ asf->state = PARSE_PACKET_HEADER;
840 ✗ asf->return_subpayload = 0;
841 ✗ asf->packet_size_internal = 0;
842 ✗ avio_skip(pb, 16); // skip File ID
843 ✗ size = avio_rl64(pb); // Total Data Packets
844 ✗ if (size != asf->nb_packets)
845 ✗ av_log(s, AV_LOG_WARNING,
846 "Number of Packets from File Properties Object is not equal to Total"
847 "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
848 size, asf->nb_packets);
849 ✗ avio_skip(pb, 2); // skip reserved field
850 ✗ asf->first_packet_offset = avio_tell(pb);
851 ✗ if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
852 ✗ align_position(pb, asf->offset, asf->data_size);
853
854 ✗ return 0;
855 }
856
857 ✗ static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
858 {
859 ✗ ASFContext *asf = s->priv_data;
860 ✗ AVIOContext *pb = s->pb;
861 ✗ AVStream *st = NULL;
862 uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
863 uint32_t pkt_num, nb_entries;
864 ✗ int32_t prev_pkt_num = -1;
865 int i;
866 int64_t offset;
867 ✗ uint64_t size = avio_rl64(pb);
868
869 // simple index objects should be ordered by stream number, this loop tries to find
870 // the first not indexed video stream
871 ✗ for (i = 0; i < asf->nb_streams; i++) {
872 ✗ if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
873 ✗ asf->asf_st[i]->indexed = 1;
874 ✗ st = s->streams[asf->asf_st[i]->index];
875 ✗ break;
876 }
877 }
878 ✗ if (!st) {
879 ✗ avio_skip(pb, size - 24); // if there's no video stream, skip index object
880 ✗ return 0;
881 }
882 ✗ avio_skip(pb, 16); // skip File ID
883 ✗ interval = avio_rl64(pb);
884 ✗ avio_skip(pb, 4);
885 ✗ nb_entries = avio_rl32(pb);
886 ✗ for (i = 0; i < nb_entries; i++) {
887 ✗ pkt_num = avio_rl32(pb);
888 ✗ offset = avio_skip(pb, 2);
889 ✗ if (offset < 0) {
890 ✗ av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
891 ✗ return offset;
892 }
893 ✗ if (asf->first_packet_offset > INT64_MAX - asf->packet_size * pkt_num)
894 ✗ return AVERROR_INVALIDDATA;
895 ✗ if (prev_pkt_num != pkt_num) {
896 ✗ av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *
897 pkt_num, av_rescale(interval, i, 10000),
898 ✗ asf->packet_size, 0, AVINDEX_KEYFRAME);
899 ✗ prev_pkt_num = pkt_num;
900 }
901 }
902 ✗ asf->is_simple_index = 1;
903 ✗ align_position(pb, asf->offset, size);
904
905 ✗ return 0;
906 }
907
908 static const GUIDParseTable gdef[] = {
909 { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
910 { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
911 { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
912 { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
913 { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
914 { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
915 { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
916 { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
917 { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
918 { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
919 { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
920 { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
921 { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
922 { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
923 { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
924 { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
925 { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
926 { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
927 { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
928 { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
929 { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
930 { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
931 { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
932 { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
933 { "Extended Stream Properties", { 0x14, 0xE6, 0xA5, 0xCB, 0xC6, 0x72, 0x43, 0x32, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A }, asf_read_ext_stream_properties, 1 },
934 { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
935 { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
936 { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
937 { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
938 { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
939 { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
940 { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
941 { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
942 { "Content Encryption System Windows Media DRM Network Devices",
943 { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
944 { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
945 { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
946 { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
947 { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
948 { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
949 { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
950 { "Payload Extension System File Name", { 0xE1, 0x65, 0xEC, 0x0E, 0x19, 0xED, 0x45, 0xD7, 0xB4, 0xA7, 0x25, 0xCB, 0xD1, 0xE2, 0x8E, 0x9B }, asf_read_unknown, 1 },
951 { "Payload Extension System Content Type", { 0xD5, 0x90, 0xDC, 0x20, 0x07, 0xBC, 0x43, 0x6C, 0x9C, 0xF7, 0xF3, 0xBB, 0xFB, 0xF1, 0xA4, 0xDC }, asf_read_unknown, 1 },
952 { "Payload Extension System Pixel Aspect Ratio", { 0x1, 0x1E, 0xE5, 0x54, 0xF9, 0xEA, 0x4B, 0xC8, 0x82, 0x1A, 0x37, 0x6B, 0x74, 0xE4, 0xC4, 0xB8 }, asf_read_unknown, 1 },
953 { "Payload Extension System Sample Duration", { 0xC6, 0xBD, 0x94, 0x50, 0x86, 0x7F, 0x49, 0x07, 0x83, 0xA3, 0xC7, 0x79, 0x21, 0xB7, 0x33, 0xAD }, asf_read_unknown, 1 },
954 { "Payload Extension System Encryption Sample ID", { 0x66, 0x98, 0xB8, 0x4E, 0x0A, 0xFA, 0x43, 0x30, 0xAE, 0xB2, 0x1C, 0x0A, 0x98, 0xD7, 0xA4, 0x4D }, asf_read_unknown, 1 },
955 { "Payload Extension System Degradable JPEG", { 0x00, 0xE1, 0xAF, 0x06, 0x7B, 0xEC, 0x11, 0xD1, 0xA5, 0x82, 0x00, 0xC0, 0x4F, 0xC2, 0x9C, 0xFB }, asf_read_unknown, 1 },
956 };
957
958 #define READ_LEN(flag, name, len) \
959 do { \
960 if ((flag) == name ## IS_BYTE) \
961 len = avio_r8(pb); \
962 else if ((flag) == name ## IS_WORD) \
963 len = avio_rl16(pb); \
964 else if ((flag) == name ## IS_DWORD) \
965 len = avio_rl32(pb); \
966 else \
967 len = 0; \
968 } while(0)
969
970 ✗ static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
971 {
972 ✗ ASFContext *asf = s->priv_data;
973 ✗ AVIOContext *pb = s->pb;
974 uint8_t sub_len;
975 int ret, i;
976
977 ✗ if (is_header) {
978 ✗ asf->dts_delta = avio_r8(pb);
979 ✗ if (asf->nb_mult_left) {
980 ✗ asf->mult_sub_len = avio_rl16(pb); // total
981 }
982 ✗ asf->sub_header_offset = avio_tell(pb);
983 ✗ asf->nb_sub = 0;
984 ✗ asf->sub_left = 1;
985 }
986 ✗ sub_len = avio_r8(pb);
987 ✗ if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
988 ✗ return ret;
989 ✗ for (i = 0; i < asf->nb_streams; i++) {
990 ✗ if (asf->stream_index == asf->asf_st[i]->stream_index) {
991 ✗ pkt->stream_index = asf->asf_st[i]->index;
992 ✗ break;
993 }
994 }
995 ✗ asf->return_subpayload = 1;
996 ✗ if (!sub_len)
997 ✗ asf->return_subpayload = 0;
998
999 ✗ if (sub_len)
1000 ✗ asf->nb_sub++;
1001 ✗ pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1002 ✗ if (asf->nb_mult_left && (avio_tell(pb) >=
1003 ✗ (asf->sub_header_offset + asf->mult_sub_len))) {
1004 ✗ asf->sub_left = 0;
1005 ✗ asf->nb_mult_left--;
1006 }
1007 ✗ if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1008 ✗ asf->sub_left = 0;
1009 ✗ if (!asf->nb_mult_left) {
1010 ✗ avio_skip(pb, asf->pad_len);
1011 ✗ if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1012 ✗ if (!asf->packet_size)
1013 ✗ return AVERROR_INVALIDDATA;
1014 ✗ av_log(s, AV_LOG_WARNING,
1015 "Position %"PRId64" wrong, should be %"PRId64"\n",
1016 ✗ avio_tell(pb), asf->packet_offset + asf->packet_size);
1017 ✗ avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1018 }
1019 }
1020 }
1021
1022 ✗ return 0;
1023 }
1024
1025 ✗ static void reset_packet(ASFPacket *asf_pkt)
1026 {
1027 ✗ asf_pkt->size_left = 0;
1028 ✗ asf_pkt->data_size = 0;
1029 ✗ asf_pkt->duration = 0;
1030 ✗ asf_pkt->flags = 0;
1031 ✗ asf_pkt->dts = 0;
1032 ✗ av_packet_unref(asf_pkt->avpkt);
1033 ✗ }
1034
1035 ✗ static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
1036 {
1037 ✗ ASFContext *asf = s->priv_data;
1038 ✗ AVIOContext *pb = s->pb;
1039 int ret, data_size;
1040
1041 ✗ if (!asf_pkt->data_size) {
1042 ✗ data_size = avio_rl32(pb); // read media object size
1043 ✗ if (data_size <= 0)
1044 ✗ return AVERROR_INVALIDDATA;
1045 ✗ if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1046 ✗ return ret;
1047 ✗ asf_pkt->data_size = asf_pkt->size_left = data_size;
1048 } else
1049 ✗ avio_skip(pb, 4); // reading of media object size is already done
1050 ✗ asf_pkt->dts = avio_rl32(pb); // read presentation time
1051 ✗ if (asf->rep_data_len >= 8)
1052 ✗ avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1053
1054 ✗ return 0;
1055 }
1056
1057 ✗ static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
1058 ASFPacket *asf_pkt)
1059 {
1060 ✗ ASFContext *asf = s->priv_data;
1061 ✗ AVIOContext *pb = s->pb;
1062 uint16_t pay_len;
1063 unsigned char *p;
1064 int ret;
1065 ✗ int skip = 0;
1066
1067 // if replicated length is 1, subpayloads are present
1068 ✗ if (asf->rep_data_len == 1) {
1069 ✗ asf->sub_left = 1;
1070 ✗ asf->state = READ_MULTI_SUB;
1071 ✗ pkt->flags = asf_pkt->flags;
1072 ✗ if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1073 ✗ return ret;
1074 } else {
1075 ✗ if (asf->rep_data_len)
1076 ✗ if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1077 ✗ return ret;
1078 ✗ pay_len = avio_rl16(pb); // payload length should be WORD
1079 ✗ if (pay_len > asf->packet_size) {
1080 ✗ av_log(s, AV_LOG_ERROR,
1081 "Error: invalid data packet size, pay_len %"PRIu16", "
1082 "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1083 pay_len, asf->packet_size, avio_tell(pb));
1084 ✗ return AVERROR_INVALIDDATA;
1085 }
1086 ✗ p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1087 ✗ if (pay_len > asf_pkt->size_left) {
1088 ✗ av_log(s, AV_LOG_ERROR,
1089 "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1090 pay_len, asf_pkt->size_left);
1091 ✗ skip = pay_len - asf_pkt->size_left;
1092 ✗ pay_len = asf_pkt->size_left;
1093 }
1094 ✗ if (asf_pkt->size_left <= 0)
1095 ✗ return AVERROR_INVALIDDATA;
1096 ✗ if ((ret = avio_read(pb, p, pay_len)) < 0)
1097 ✗ return ret;
1098 ✗ if (s->key && s->keylen == 20)
1099 ✗ ff_asfcrypt_dec(s->key, p, ret);
1100 ✗ avio_skip(pb, skip);
1101 ✗ asf_pkt->size_left -= pay_len;
1102 ✗ asf->nb_mult_left--;
1103 }
1104
1105 ✗ return 0;
1106 }
1107
1108 ✗ static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
1109 {
1110 ✗ ASFContext *asf = s->priv_data;
1111 ✗ AVIOContext *pb = s->pb;
1112 int64_t offset;
1113 uint64_t size;
1114 unsigned char *p;
1115 int ret, data_size;
1116
1117 ✗ if (!asf_pkt->data_size) {
1118 ✗ data_size = avio_rl32(pb); // read media object size
1119 ✗ if (data_size <= 0)
1120 ✗ return AVERROR_EOF;
1121 ✗ if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1122 ✗ return ret;
1123 ✗ asf_pkt->data_size = asf_pkt->size_left = data_size;
1124 } else
1125 ✗ avio_skip(pb, 4); // skip media object size
1126 ✗ asf_pkt->dts = avio_rl32(pb); // read presentation time
1127 ✗ if (asf->rep_data_len >= 8)
1128 ✗ avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1129 ✗ offset = avio_tell(pb);
1130
1131 // size of the payload - size of the packet without header and padding
1132 ✗ if (asf->packet_size_internal)
1133 ✗ size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1134 else
1135 ✗ size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1136 ✗ if (size > asf->packet_size) {
1137 ✗ av_log(s, AV_LOG_ERROR,
1138 "Error: invalid data packet size, offset %"PRId64".\n",
1139 avio_tell(pb));
1140 ✗ return AVERROR_INVALIDDATA;
1141 }
1142 ✗ p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1143 ✗ if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1144 ✗ return AVERROR_INVALIDDATA;
1145 ✗ if (asf_pkt->size_left > size)
1146 ✗ asf_pkt->size_left -= size;
1147 else
1148 ✗ asf_pkt->size_left = 0;
1149 ✗ if ((ret = avio_read(pb, p, size)) < 0)
1150 ✗ return ret;
1151 ✗ if (s->key && s->keylen == 20)
1152 ✗ ff_asfcrypt_dec(s->key, p, ret);
1153 ✗ if (asf->packet_size_internal)
1154 ✗ avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1155 ✗ avio_skip(pb, asf->pad_len); // skip padding
1156
1157 ✗ return 0;
1158 }
1159
1160 ✗ static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
1161 {
1162 ✗ ASFContext *asf = s->priv_data;
1163 ✗ AVIOContext *pb = s->pb;
1164 int ret, i;
1165 ✗ ASFPacket *asf_pkt = NULL;
1166
1167 ✗ if (!asf->sub_left) {
1168 uint32_t off_len, media_len;
1169 uint8_t stream_num;
1170
1171 ✗ stream_num = avio_r8(pb);
1172 ✗ asf->stream_index = stream_num & ASF_STREAM_NUM;
1173 ✗ for (i = 0; i < asf->nb_streams; i++) {
1174 ✗ if (asf->stream_index == asf->asf_st[i]->stream_index) {
1175 ✗ asf_pkt = &asf->asf_st[i]->pkt;
1176 ✗ asf_pkt->stream_index = asf->asf_st[i]->index;
1177 ✗ break;
1178 }
1179 }
1180 ✗ if (!asf_pkt) {
1181 ✗ if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1182 ✗ if (!asf->packet_size) {
1183 ✗ av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1184 ✗ return AVERROR_INVALIDDATA;
1185 }
1186 ✗ avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1187 ✗ av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1188 asf->stream_index);
1189 ✗ return AVERROR(EAGAIN);
1190 } else
1191 ✗ return AVERROR_INVALIDDATA;
1192 }
1193
1194 ✗ if (stream_num >> 7)
1195 ✗ asf_pkt->flags |= AV_PKT_FLAG_KEY;
1196 ✗ READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
1197 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1198 ✗ READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
1199 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1200 ✗ READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
1201 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1202 ✗ if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1203 ✗ av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1204 ✗ reset_packet(asf_pkt);
1205 }
1206 ✗ asf_pkt->frame_num = media_len;
1207 ✗ asf->sub_dts = off_len;
1208 ✗ if (asf->nb_mult_left) {
1209 ✗ if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1210 ✗ return ret;
1211 ✗ } else if (asf->rep_data_len == 1) {
1212 ✗ asf->sub_left = 1;
1213 ✗ asf->state = READ_SINGLE;
1214 ✗ pkt->flags = asf_pkt->flags;
1215 ✗ if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1216 ✗ return ret;
1217 } else {
1218 ✗ if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1219 ✗ return ret;
1220 }
1221 } else {
1222 ✗ for (i = 0; i <= asf->nb_streams; i++) {
1223 ✗ if (asf->stream_index == asf->asf_st[i]->stream_index) {
1224 ✗ asf_pkt = &asf->asf_st[i]->pkt;
1225 ✗ break;
1226 }
1227 }
1228 ✗ if (!asf_pkt)
1229 ✗ return AVERROR_INVALIDDATA;
1230 ✗ pkt->flags = asf_pkt->flags;
1231 ✗ pkt->dts = asf_pkt->dts;
1232 ✗ pkt->stream_index = asf->asf_st[i]->index;
1233 ✗ if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1234 ✗ return ret;
1235 }
1236
1237 ✗ return 0;
1238 }
1239
1240 ✗ static int asf_read_packet_header(AVFormatContext *s)
1241 {
1242 ✗ ASFContext *asf = s->priv_data;
1243 ✗ AVIOContext *pb = s->pb;
1244 uint64_t size;
1245 uint32_t av_unused seq;
1246 unsigned char error_flags, len_flags, pay_flags;
1247
1248 ✗ asf->packet_offset = avio_tell(pb);
1249 ✗ if (asf->packet_offset > INT64_MAX/2)
1250 ✗ asf->packet_offset = 0;
1251 ✗ error_flags = avio_r8(pb); // read Error Correction Flags
1252 ✗ if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1253 ✗ if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1254 ✗ size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1255 ✗ avio_skip(pb, size);
1256 }
1257 ✗ len_flags = avio_r8(pb);
1258 } else
1259 ✗ len_flags = error_flags;
1260 ✗ asf->prop_flags = avio_r8(pb);
1261 ✗ READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
1262 ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1263 ✗ READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
1264 ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1265 ✗ READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
1266 ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1267 ✗ asf->send_time = avio_rl32(pb); // send time
1268 ✗ avio_skip(pb, 2); // skip duration
1269 ✗ if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1270 ✗ pay_flags = avio_r8(pb);
1271 ✗ asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1272 }
1273
1274 ✗ return 0;
1275 }
1276
1277 ✗ static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1278 {
1279 ✗ ASFContext *asf = s->priv_data;
1280 ✗ ASFStream *asf_st = asf->asf_st[st_num];
1281 ✗ unsigned char *p = asf_pkt->avpkt->data;
1282 ✗ uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1283 ✗ uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1284 ✗ int nchunks = pkt_len / chunk_len;
1285 uint8_t *data;
1286 ✗ int pos = 0, j, l, ret;
1287
1288
1289 ✗ data = av_malloc(asf_pkt->data_size + AV_INPUT_BUFFER_PADDING_SIZE);
1290 ✗ if (!data)
1291 ✗ return AVERROR(ENOMEM);
1292 ✗ memset(data + asf_pkt->data_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1293
1294 ✗ while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1295 ✗ if (pos >= asf_pkt->data_size) {
1296 ✗ break;
1297 }
1298 ✗ for (l = 0; l < pkt_len; l++) {
1299 ✗ if (pos >= asf_pkt->data_size) {
1300 ✗ break;
1301 }
1302 ✗ for (j = 0; j < asf_st->span; j++) {
1303 ✗ if ((pos + chunk_len) >= asf_pkt->data_size)
1304 ✗ break;
1305 ✗ memcpy(data + pos,
1306 ✗ p + (j * nchunks + l) * chunk_len,
1307 chunk_len);
1308 ✗ pos += chunk_len;
1309 }
1310 }
1311 ✗ p += asf_st->span * pkt_len;
1312 ✗ if (p > asf_pkt->avpkt->data + asf_pkt->data_size)
1313 ✗ break;
1314 }
1315 ✗ av_packet_unref(asf_pkt->avpkt);
1316 ✗ ret = av_packet_from_data(asf_pkt->avpkt, data, asf_pkt->data_size);
1317 ✗ if (ret < 0)
1318 ✗ av_free(data);
1319
1320 ✗ return ret;
1321 }
1322
1323 ✗ static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1324 {
1325 ✗ ASFContext *asf = s->priv_data;
1326 ✗ AVIOContext *pb = s->pb;
1327 int ret, i;
1328
1329 ✗ if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1330 ✗ !(asf->b_flags & ASF_FLAG_BROADCAST))
1331 ✗ return AVERROR_EOF;
1332 ✗ while (!pb->eof_reached) {
1333 ✗ if (asf->state == PARSE_PACKET_HEADER) {
1334 ✗ asf_read_packet_header(s);
1335 ✗ if (pb->eof_reached)
1336 ✗ break;
1337 ✗ if (!asf->nb_mult_left)
1338 ✗ asf->state = READ_SINGLE;
1339 else
1340 ✗ asf->state = READ_MULTI;
1341 }
1342 ✗ ret = asf_read_payload(s, pkt);
1343 ✗ if (ret == AVERROR(EAGAIN)) {
1344 ✗ asf->state = PARSE_PACKET_HEADER;
1345 ✗ continue;
1346 }
1347 ✗ else if (ret < 0)
1348 ✗ return ret;
1349
1350 ✗ switch (asf->state) {
1351 ✗ case READ_SINGLE:
1352 ✗ if (!asf->sub_left)
1353 ✗ asf->state = PARSE_PACKET_HEADER;
1354 ✗ break;
1355 ✗ case READ_MULTI_SUB:
1356 ✗ if (!asf->sub_left && !asf->nb_mult_left) {
1357 ✗ asf->state = PARSE_PACKET_HEADER;
1358 ✗ if (!asf->return_subpayload &&
1359 ✗ (avio_tell(pb) <= asf->packet_offset +
1360 ✗ asf->packet_size - asf->pad_len))
1361 ✗ avio_skip(pb, asf->pad_len); // skip padding
1362 ✗ if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1363 ✗ avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1364 ✗ } else if (!asf->sub_left)
1365 ✗ asf->state = READ_MULTI;
1366 ✗ break;
1367 ✗ case READ_MULTI:
1368 ✗ if (!asf->nb_mult_left) {
1369 ✗ asf->state = PARSE_PACKET_HEADER;
1370 ✗ if (!asf->return_subpayload &&
1371 ✗ (avio_tell(pb) <= asf->packet_offset +
1372 ✗ asf->packet_size - asf->pad_len))
1373 ✗ avio_skip(pb, asf->pad_len); // skip padding
1374 ✗ if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1375 ✗ avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1376 }
1377 ✗ break;
1378 }
1379 ✗ if (asf->return_subpayload) {
1380 ✗ asf->return_subpayload = 0;
1381 ✗ return 0;
1382 }
1383 ✗ for (i = 0; i < asf->nb_streams; i++) {
1384 ✗ ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1385 ✗ if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1386 ✗ if (asf->asf_st[i]->span > 1 &&
1387 ✗ asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1388 ✗ if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1389 ✗ return ret;
1390 ✗ av_packet_move_ref(pkt, asf_pkt->avpkt);
1391 ✗ pkt->stream_index = asf->asf_st[i]->index;
1392 ✗ pkt->flags = asf_pkt->flags;
1393 ✗ pkt->dts = asf_pkt->dts - asf->preroll;
1394 ✗ asf_pkt->data_size = 0;
1395 ✗ asf_pkt->frame_num = 0;
1396 ✗ return 0;
1397 }
1398 }
1399 }
1400
1401 ✗ if (pb->eof_reached)
1402 ✗ return AVERROR_EOF;
1403
1404 ✗ return 0;
1405 }
1406
1407 ✗ static int asf_read_close(AVFormatContext *s)
1408 {
1409 ✗ ASFContext *asf = s->priv_data;
1410 int i;
1411
1412 ✗ for (i = 0; i < ASF_MAX_STREAMS; i++) {
1413 ✗ av_dict_free(&asf->asf_sd[i].asf_met);
1414 ✗ if (i < asf->nb_streams) {
1415 ✗ av_packet_free(&asf->asf_st[i]->pkt.avpkt);
1416 ✗ av_freep(&asf->asf_st[i]);
1417 }
1418 }
1419
1420 ✗ asf->nb_streams = 0;
1421 ✗ return 0;
1422 }
1423
1424 ✗ static void reset_packet_state(AVFormatContext *s)
1425 {
1426 ✗ ASFContext *asf = s->priv_data;
1427 int i;
1428
1429 ✗ asf->state = PARSE_PACKET_HEADER;
1430 ✗ asf->offset = 0;
1431 ✗ asf->return_subpayload = 0;
1432 ✗ asf->sub_left = 0;
1433 ✗ asf->sub_header_offset = 0;
1434 ✗ asf->packet_offset = asf->first_packet_offset;
1435 ✗ asf->pad_len = 0;
1436 ✗ asf->rep_data_len = 0;
1437 ✗ asf->dts_delta = 0;
1438 ✗ asf->mult_sub_len = 0;
1439 ✗ asf->nb_mult_left = 0;
1440 ✗ asf->nb_sub = 0;
1441 ✗ asf->prop_flags = 0;
1442 ✗ asf->sub_dts = 0;
1443 ✗ for (i = 0; i < asf->nb_streams; i++) {
1444 ✗ ASFPacket *pkt = &asf->asf_st[i]->pkt;
1445 ✗ reset_packet(pkt);
1446 }
1447 ✗ }
1448
1449 /*
1450 * Find a timestamp for the requested position within the payload
1451 * where the pos (position) is the offset inside the Data Object.
1452 * When position is not on the packet boundary, asf_read_timestamp tries
1453 * to find the closest packet offset after this position. If this packet
1454 * is a key frame, this packet timestamp is read and an index entry is created
1455 * for the packet. If this packet belongs to the requested stream,
1456 * asf_read_timestamp upgrades pos to the packet beginning offset and
1457 * returns this packet's dts. So returned dts is the dts of the first key frame with
1458 * matching stream number after given position.
1459 */
1460 ✗ static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1461 int64_t *pos, int64_t pos_limit)
1462 {
1463 ✗ ASFContext *asf = s->priv_data;
1464 ✗ int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1465 ✗ AVPacket *pkt = av_packet_alloc();
1466 int n;
1467
1468 ✗ if (!pkt)
1469 ✗ return AVERROR(ENOMEM);
1470
1471 ✗ data_end = asf->data_offset + asf->data_size;
1472
1473 ✗ n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1474 ✗ asf->packet_size;
1475 ✗ n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1476 ✗ pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1477
1478 ✗ avio_seek(s->pb, pkt_pos, SEEK_SET);
1479 ✗ pkt_offset = pkt_pos;
1480
1481 ✗ reset_packet_state(s);
1482 ✗ while (avio_tell(s->pb) < data_end) {
1483
1484 int i, ret, st_found;
1485
1486 ✗ pkt_offset = avio_tell(s->pb);
1487 ✗ if ((ret = asf_read_packet(s, pkt)) < 0) {
1488 ✗ av_packet_free(&pkt);
1489 ✗ dts = AV_NOPTS_VALUE;
1490 ✗ return ret;
1491 }
1492 // ASFPacket may contain fragments of packets belonging to different streams,
1493 // pkt_offset is the offset of the first fragment within it.
1494 ✗ if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1495 ✗ pkt_pos += asf->packet_size;
1496 ✗ for (i = 0; i < asf->nb_streams; i++) {
1497 ✗ ASFStream *st = asf->asf_st[i];
1498
1499 ✗ st_found = 0;
1500 ✗ if (pkt->flags & AV_PKT_FLAG_KEY) {
1501 ✗ dts = pkt->dts;
1502 ✗ if (dts) {
1503 ✗ av_add_index_entry(s->streams[pkt->stream_index], pkt_pos,
1504 ✗ dts, pkt->size, 0, AVINDEX_KEYFRAME);
1505 ✗ if (stream_index == st->index) {
1506 ✗ st_found = 1;
1507 ✗ break;
1508 }
1509 }
1510 }
1511 }
1512 ✗ if (st_found)
1513 ✗ break;
1514 ✗ av_packet_unref(pkt);
1515 }
1516 ✗ *pos = pkt_pos;
1517
1518 ✗ av_packet_free(&pkt);
1519 ✗ return dts;
1520 }
1521
1522 ✗ static int asf_read_seek(AVFormatContext *s, int stream_index,
1523 int64_t timestamp, int flags)
1524 {
1525 ✗ ASFContext *asf = s->priv_data;
1526 ✗ AVStream *const st = s->streams[stream_index];
1527 ✗ FFStream *const sti = ffstream(st);
1528 int idx, ret;
1529
1530 ✗ if (sti->nb_index_entries && asf->is_simple_index) {
1531 ✗ idx = av_index_search_timestamp(st, timestamp, flags);
1532 ✗ if (idx < 0 || idx >= sti->nb_index_entries)
1533 ✗ return AVERROR_INVALIDDATA;
1534 ✗ avio_seek(s->pb, sti->index_entries[idx].pos, SEEK_SET);
1535 } else {
1536 ✗ if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1537 ✗ return ret;
1538 }
1539
1540 ✗ reset_packet_state(s);
1541
1542 ✗ return 0;
1543 }
1544
1545 ✗ static const GUIDParseTable *find_guid(ff_asf_guid guid)
1546 {
1547 int j, ret;
1548 const GUIDParseTable *g;
1549
1550 ✗ swap_guid(guid);
1551 ✗ g = gdef;
1552 ✗ for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1553 ✗ if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1554 ✗ return g;
1555 ✗ g++;
1556 }
1557
1558 ✗ return NULL;
1559 }
1560
1561 ✗ static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1562 {
1563 ✗ ASFContext *asf = s->priv_data;
1564 ✗ AVIOContext *pb = s->pb;
1565 ✗ const GUIDParseTable *g = NULL;
1566 ff_asf_guid guid;
1567 int ret;
1568
1569 ✗ if (offset > INT64_MAX - size)
1570 ✗ return AVERROR_INVALIDDATA;
1571
1572 ✗ while (avio_tell(pb) <= offset + size) {
1573 ✗ if (avio_tell(pb) == asf->offset)
1574 ✗ break;
1575 ✗ asf->offset = avio_tell(pb);
1576 ✗ if ((ret = ff_get_guid(pb, &guid)) < 0)
1577 ✗ return ret;
1578 ✗ g = find_guid(guid);
1579 ✗ if (g) {
1580 ✗ if ((ret = g->read_object(s, g)) < 0)
1581 ✗ return ret;
1582 } else {
1583 GUIDParseTable g2;
1584
1585 ✗ g2.name = "Unknown";
1586 ✗ g2.is_subobject = 1;
1587 ✗ asf_read_unknown(s, &g2);
1588 }
1589 }
1590
1591 ✗ return 0;
1592 }
1593
1594 ✗ static int asf_read_header(AVFormatContext *s)
1595 {
1596 ✗ ASFContext *asf = s->priv_data;
1597 ✗ AVIOContext *pb = s->pb;
1598 ✗ const GUIDParseTable *g = NULL;
1599 ff_asf_guid guid;
1600 int i, ret;
1601 uint64_t size;
1602
1603 ✗ asf->preroll = 0;
1604 ✗ asf->is_simple_index = 0;
1605 ✗ ff_get_guid(pb, &guid);
1606 ✗ if (ff_guidcmp(&guid, &ff_asf_header))
1607 ✗ return AVERROR_INVALIDDATA;
1608 ✗ avio_skip(pb, 8); // skip header object size
1609 ✗ avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1610 ✗ asf->data_reached = 0;
1611
1612 /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1613 * for the first time,
1614 * Index object is processed and got eof and then seeking back to the Data is performed.
1615 */
1616 while (1) {
1617 // for the cases when object size is invalid
1618 ✗ if (avio_tell(pb) == asf->offset)
1619 ✗ break;
1620 ✗ asf->offset = avio_tell(pb);
1621 ✗ if ((ret = ff_get_guid(pb, &guid)) < 0) {
1622 ✗ if (ret == AVERROR_EOF && asf->data_reached)
1623 break;
1624 else
1625 ✗ goto failed;
1626 }
1627 ✗ g = find_guid(guid);
1628 ✗ if (g) {
1629 ✗ asf->unknown_offset = asf->offset;
1630 ✗ asf->is_header = 1;
1631 ✗ if ((ret = g->read_object(s, g)) < 0)
1632 ✗ goto failed;
1633 } else {
1634 ✗ size = avio_rl64(pb);
1635 ✗ align_position(pb, asf->offset, size);
1636 }
1637 ✗ if (asf->data_reached &&
1638 ✗ (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1639 ✗ (asf->b_flags & ASF_FLAG_BROADCAST)))
1640 break;
1641 }
1642
1643 ✗ if (!asf->data_reached) {
1644 ✗ av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1645 ✗ ret = AVERROR_INVALIDDATA;
1646 ✗ goto failed;
1647 }
1648 ✗ if (pb->seekable & AVIO_SEEKABLE_NORMAL)
1649 ✗ avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1650
1651 ✗ for (i = 0; i < asf->nb_streams; i++) {
1652 ✗ const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1653 ✗ AVStream *st = s->streams[asf->asf_st[i]->index];
1654 ✗ set_language(s, rfc1766, &st->metadata);
1655 }
1656
1657 ✗ for (i = 0; i < ASF_MAX_STREAMS; i++) {
1658 ✗ AVStream *st = NULL;
1659
1660 ✗ st = find_stream(s, i);
1661 ✗ if (st) {
1662 ✗ av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX);
1663 ✗ if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1664 ✗ st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num;
1665 ✗ st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den;
1666 }
1667 }
1668 }
1669
1670 ✗ return 0;
1671
1672 ✗ failed:
1673 ✗ asf_read_close(s);
1674 ✗ return ret;
1675 }
1676
1677 const AVInputFormat ff_asf_o_demuxer = {
1678 .name = "asf_o",
1679 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1680 .priv_data_size = sizeof(ASFContext),
1681 .read_probe = asf_probe,
1682 .read_header = asf_read_header,
1683 .read_packet = asf_read_packet,
1684 .read_close = asf_read_close,
1685 .read_timestamp = asf_read_timestamp,
1686 .read_seek = asf_read_seek,
1687 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1688 };
1689