workaround for broken files created by previous versions of asfenc.
[libav.git] / libavformat / asfdec.c
1 /*
2 * ASF compatible demuxer
3 * Copyright (c) 2000, 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 //#define DEBUG
23
24 #include "libavutil/common.h"
25 #include "libavutil/avstring.h"
26 #include "libavcodec/mpegaudio.h"
27 #include "avformat.h"
28 #include "riff.h"
29 #include "asf.h"
30 #include "asfcrypt.h"
31 #include "avlanguage.h"
32
33 void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
34
35 #undef NDEBUG
36 #include <assert.h>
37
38 #define FRAME_HEADER_SIZE 17
39 // Fix Me! FRAME_HEADER_SIZE may be different.
40
41 static const ff_asf_guid index_guid = {
42 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
43 };
44
45 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
46 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
47 };
48 /**********************************/
49 /* decoding */
50
51 static int guidcmp(const void *g1, const void *g2)
52 {
53 return memcmp(g1, g2, sizeof(ff_asf_guid));
54 }
55
56 #ifdef DEBUG
57 #define PRINT_IF_GUID(g,cmp) \
58 if (!guidcmp(g, &cmp)) \
59 dprintf(NULL, "(GUID: %s) ", #cmp)
60
61 static void print_guid(const ff_asf_guid *g)
62 {
63 int i;
64 PRINT_IF_GUID(g, ff_asf_header);
65 else PRINT_IF_GUID(g, ff_asf_file_header);
66 else PRINT_IF_GUID(g, ff_asf_stream_header);
67 else PRINT_IF_GUID(g, ff_asf_audio_stream);
68 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
69 else PRINT_IF_GUID(g, ff_asf_video_stream);
70 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
71 else PRINT_IF_GUID(g, ff_asf_command_stream);
72 else PRINT_IF_GUID(g, ff_asf_comment_header);
73 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
74 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
75 else PRINT_IF_GUID(g, ff_asf_data_header);
76 else PRINT_IF_GUID(g, index_guid);
77 else PRINT_IF_GUID(g, ff_asf_head1_guid);
78 else PRINT_IF_GUID(g, ff_asf_head2_guid);
79 else PRINT_IF_GUID(g, ff_asf_my_guid);
80 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
81 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
82 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
83 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
84 else PRINT_IF_GUID(g, ff_asf_metadata_header);
85 else PRINT_IF_GUID(g, stream_bitrate_guid);
86 else PRINT_IF_GUID(g, ff_asf_language_guid);
87 else
88 dprintf(NULL, "(GUID: unknown) ");
89 for(i=0;i<16;i++)
90 dprintf(NULL, " 0x%02x,", (*g)[i]);
91 dprintf(NULL, "}\n");
92 }
93 #undef PRINT_IF_GUID
94 #else
95 #define print_guid(g)
96 #endif
97
98 static void get_guid(ByteIOContext *s, ff_asf_guid *g)
99 {
100 assert(sizeof(*g) == 16);
101 get_buffer(s, *g, sizeof(*g));
102 }
103
104 #if 0
105 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
106 {
107 int len, c;
108 char *q;
109
110 len = get_le16(pb);
111 q = buf;
112 while (len > 0) {
113 c = get_le16(pb);
114 if ((q - buf) < buf_size - 1)
115 *q++ = c;
116 len--;
117 }
118 *q = '\0';
119 }
120 #endif
121
122 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
123 {
124 char* q = buf;
125 for (; len > 1; len -= 2) {
126 uint8_t tmp;
127 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
128 }
129 if (len > 0)
130 url_fskip(pb, len);
131 *q = '\0';
132 }
133
134 static int asf_probe(AVProbeData *pd)
135 {
136 /* check file header */
137 if (!guidcmp(pd->buf, &ff_asf_header))
138 return AVPROBE_SCORE_MAX;
139 else
140 return 0;
141 }
142
143 static int get_value(ByteIOContext *pb, int type){
144 switch(type){
145 case 2: return get_le32(pb);
146 case 3: return get_le32(pb);
147 case 4: return get_le64(pb);
148 case 5: return get_le16(pb);
149 default:return INT_MIN;
150 }
151 }
152
153 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
154 {
155 char *value;
156
157 if ((unsigned)len >= UINT_MAX)
158 return;
159
160 value = av_malloc(len+1);
161 if (!value)
162 return;
163
164 if (type <= 1) { // unicode or byte
165 get_str16_nolen(s->pb, len, value, len);
166 } else if (type <= 5) { // boolean or DWORD or QWORD or WORD
167 uint64_t num = get_value(s->pb, type);
168 snprintf(value, len, "%"PRIu64, num);
169 } else {
170 url_fskip(s->pb, len);
171 return;
172 }
173 if (!strncmp(key, "WM/", 3))
174 key += 3;
175 av_metadata_set2(&s->metadata, key, value, AV_METADATA_DONT_STRDUP_VAL);
176 }
177
178 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
179 {
180 ASFContext *asf = s->priv_data;
181 ff_asf_guid g;
182 ByteIOContext *pb = s->pb;
183 AVStream *st;
184 ASFStream *asf_st;
185 int size, i;
186 int64_t gsize;
187 AVRational dar[128];
188 uint32_t bitrate[128];
189
190 memset(dar, 0, sizeof(dar));
191 memset(bitrate, 0, sizeof(bitrate));
192
193 get_guid(pb, &g);
194 if (guidcmp(&g, &ff_asf_header))
195 return -1;
196 get_le64(pb);
197 get_le32(pb);
198 get_byte(pb);
199 get_byte(pb);
200 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
201 for(;;) {
202 get_guid(pb, &g);
203 gsize = get_le64(pb);
204 dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
205 print_guid(&g);
206 dprintf(s, " size=0x%"PRIx64"\n", gsize);
207 if (!guidcmp(&g, &ff_asf_data_header)) {
208 asf->data_object_offset = url_ftell(pb);
209 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
210 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
211 asf->data_object_size = gsize - 24;
212 } else {
213 asf->data_object_size = (uint64_t)-1;
214 }
215 break;
216 }
217 if (gsize < 24)
218 return -1;
219 if (!guidcmp(&g, &ff_asf_file_header)) {
220 get_guid(pb, &asf->hdr.guid);
221 asf->hdr.file_size = get_le64(pb);
222 asf->hdr.create_time = get_le64(pb);
223 asf->nb_packets = get_le64(pb);
224 asf->hdr.play_time = get_le64(pb);
225 asf->hdr.send_time = get_le64(pb);
226 asf->hdr.preroll = get_le32(pb);
227 asf->hdr.ignore = get_le32(pb);
228 asf->hdr.flags = get_le32(pb);
229 asf->hdr.min_pktsize = get_le32(pb);
230 asf->hdr.max_pktsize = get_le32(pb);
231 asf->hdr.max_bitrate = get_le32(pb);
232 s->packet_size = asf->hdr.max_pktsize;
233 } else if (!guidcmp(&g, &ff_asf_stream_header)) {
234 enum CodecType type;
235 int type_specific_size, sizeX;
236 uint64_t total_size;
237 unsigned int tag1;
238 int64_t pos1, pos2, start_time;
239 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
240
241 pos1 = url_ftell(pb);
242
243 st = av_new_stream(s, 0);
244 if (!st)
245 return AVERROR(ENOMEM);
246 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
247 asf_st = av_mallocz(sizeof(ASFStream));
248 if (!asf_st)
249 return AVERROR(ENOMEM);
250 st->priv_data = asf_st;
251 start_time = asf->hdr.preroll;
252
253 asf_st->stream_language_index = 128; // invalid stream index means no language info
254
255 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
256 st->duration = asf->hdr.play_time /
257 (10000000 / 1000) - start_time;
258 }
259 get_guid(pb, &g);
260
261 test_for_ext_stream_audio = 0;
262 if (!guidcmp(&g, &ff_asf_audio_stream)) {
263 type = CODEC_TYPE_AUDIO;
264 } else if (!guidcmp(&g, &ff_asf_video_stream)) {
265 type = CODEC_TYPE_VIDEO;
266 } else if (!guidcmp(&g, &ff_asf_command_stream)) {
267 type = CODEC_TYPE_DATA;
268 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
269 test_for_ext_stream_audio = 1;
270 type = CODEC_TYPE_UNKNOWN;
271 } else {
272 return -1;
273 }
274 get_guid(pb, &g);
275 total_size = get_le64(pb);
276 type_specific_size = get_le32(pb);
277 get_le32(pb);
278 st->id = get_le16(pb) & 0x7f; /* stream id */
279 // mapping of asf ID to AV stream ID;
280 asf->asfid2avid[st->id] = s->nb_streams - 1;
281
282 get_le32(pb);
283
284 if (test_for_ext_stream_audio) {
285 get_guid(pb, &g);
286 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
287 type = CODEC_TYPE_AUDIO;
288 is_dvr_ms_audio=1;
289 get_guid(pb, &g);
290 get_le32(pb);
291 get_le32(pb);
292 get_le32(pb);
293 get_guid(pb, &g);
294 get_le32(pb);
295 }
296 }
297
298 st->codec->codec_type = type;
299 if (type == CODEC_TYPE_AUDIO) {
300 ff_get_wav_header(pb, st->codec, type_specific_size);
301 if (is_dvr_ms_audio) {
302 // codec_id and codec_tag are unreliable in dvr_ms
303 // files. Set them later by probing stream.
304 st->codec->codec_id = CODEC_ID_PROBE;
305 st->codec->codec_tag = 0;
306 }
307 if (st->codec->codec_id == CODEC_ID_AAC) {
308 st->need_parsing = AVSTREAM_PARSE_NONE;
309 } else {
310 st->need_parsing = AVSTREAM_PARSE_FULL;
311 }
312 /* We have to init the frame size at some point .... */
313 pos2 = url_ftell(pb);
314 if (gsize >= (pos2 + 8 - pos1 + 24)) {
315 asf_st->ds_span = get_byte(pb);
316 asf_st->ds_packet_size = get_le16(pb);
317 asf_st->ds_chunk_size = get_le16(pb);
318 get_le16(pb); //ds_data_size
319 get_byte(pb); //ds_silence_data
320 }
321 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
322 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
323 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
324 if (asf_st->ds_span > 1) {
325 if (!asf_st->ds_chunk_size
326 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
327 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
328 asf_st->ds_span = 0; // disable descrambling
329 }
330 switch (st->codec->codec_id) {
331 case CODEC_ID_MP3:
332 st->codec->frame_size = MPA_FRAME_SIZE;
333 break;
334 case CODEC_ID_PCM_S16LE:
335 case CODEC_ID_PCM_S16BE:
336 case CODEC_ID_PCM_U16LE:
337 case CODEC_ID_PCM_U16BE:
338 case CODEC_ID_PCM_S8:
339 case CODEC_ID_PCM_U8:
340 case CODEC_ID_PCM_ALAW:
341 case CODEC_ID_PCM_MULAW:
342 st->codec->frame_size = 1;
343 break;
344 default:
345 /* This is probably wrong, but it prevents a crash later */
346 st->codec->frame_size = 1;
347 break;
348 }
349 } else if (type == CODEC_TYPE_VIDEO) {
350 get_le32(pb);
351 get_le32(pb);
352 get_byte(pb);
353 size = get_le16(pb); /* size */
354 sizeX= get_le32(pb); /* size */
355 st->codec->width = get_le32(pb);
356 st->codec->height = get_le32(pb);
357 /* not available for asf */
358 get_le16(pb); /* panes */
359 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
360 tag1 = get_le32(pb);
361 url_fskip(pb, 20);
362 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
363 size= sizeX;
364 if (size > 40) {
365 st->codec->extradata_size = size - 40;
366 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
367 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
368 }
369
370 /* Extract palette from extradata if bpp <= 8 */
371 /* This code assumes that extradata contains only palette */
372 /* This is true for all paletted codecs implemented in ffmpeg */
373 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
374 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
375 #if HAVE_BIGENDIAN
376 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
377 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
378 #else
379 memcpy(st->codec->palctrl->palette, st->codec->extradata,
380 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
381 #endif
382 st->codec->palctrl->palette_changed = 1;
383 }
384
385 st->codec->codec_tag = tag1;
386 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
387 if(tag1 == MKTAG('D', 'V', 'R', ' '))
388 st->need_parsing = AVSTREAM_PARSE_FULL;
389 }
390 pos2 = url_ftell(pb);
391 url_fskip(pb, gsize - (pos2 - pos1 + 24));
392 } else if (!guidcmp(&g, &ff_asf_comment_header)) {
393 int len1, len2, len3, len4, len5;
394
395 len1 = get_le16(pb);
396 len2 = get_le16(pb);
397 len3 = get_le16(pb);
398 len4 = get_le16(pb);
399 len5 = get_le16(pb);
400 get_tag(s, "title" , 0, len1);
401 get_tag(s, "author" , 0, len2);
402 get_tag(s, "copyright", 0, len3);
403 get_tag(s, "comment" , 0, len4);
404 url_fskip(pb, len5);
405 } else if (!guidcmp(&g, &stream_bitrate_guid)) {
406 int stream_count = get_le16(pb);
407 int j;
408
409 // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
410 // av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
411 for(j = 0; j < stream_count; j++) {
412 int flags, bitrate, stream_id;
413
414 flags= get_le16(pb);
415 bitrate= get_le32(pb);
416 stream_id= (flags & 0x7f);
417 // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
418 asf->stream_bitrates[stream_id]= bitrate;
419 }
420 } else if (!guidcmp(&g, &ff_asf_language_guid)) {
421 int j;
422 int stream_count = get_le16(pb);
423 for(j = 0; j < stream_count; j++) {
424 char lang[6];
425 unsigned int lang_len = get_byte(pb);
426 get_str16_nolen(pb, lang_len, lang, sizeof(lang));
427 if (j < 128)
428 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
429 }
430 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
431 int desc_count, i;
432
433 desc_count = get_le16(pb);
434 for(i=0;i<desc_count;i++) {
435 int name_len,value_type,value_len;
436 char name[1024];
437
438 name_len = get_le16(pb);
439 if (name_len%2) // must be even, broken lavf versions wrote len-1
440 name_len += 1;
441 get_str16_nolen(pb, name_len, name, sizeof(name));
442 value_type = get_le16(pb);
443 value_len = get_le16(pb);
444 if (value_len%2)
445 value_len += 1;
446 get_tag(s, name, value_type, value_len);
447 }
448 } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
449 int n, stream_num, name_len, value_len, value_type, value_num;
450 n = get_le16(pb);
451
452 for(i=0;i<n;i++) {
453 char name[1024];
454
455 get_le16(pb); //lang_list_index
456 stream_num= get_le16(pb);
457 name_len= get_le16(pb);
458 value_type= get_le16(pb);
459 value_len= get_le32(pb);
460
461 get_str16_nolen(pb, name_len, name, sizeof(name));
462 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
463 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
464 url_fskip(pb, value_len - 2);
465
466 if(stream_num<128){
467 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
468 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
469 }
470 }
471 } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
472 int ext_len, payload_ext_ct, stream_ct;
473 uint32_t ext_d, leak_rate, stream_num;
474 unsigned int stream_languageid_index;
475
476 get_le64(pb); // starttime
477 get_le64(pb); // endtime
478 leak_rate = get_le32(pb); // leak-datarate
479 get_le32(pb); // bucket-datasize
480 get_le32(pb); // init-bucket-fullness
481 get_le32(pb); // alt-leak-datarate
482 get_le32(pb); // alt-bucket-datasize
483 get_le32(pb); // alt-init-bucket-fullness
484 get_le32(pb); // max-object-size
485 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
486 stream_num = get_le16(pb); // stream-num
487
488 stream_languageid_index = get_le16(pb); // stream-language-id-index
489 if (stream_num < 128)
490 asf->streams[stream_num].stream_language_index = stream_languageid_index;
491
492 get_le64(pb); // avg frametime in 100ns units
493 stream_ct = get_le16(pb); //stream-name-count
494 payload_ext_ct = get_le16(pb); //payload-extension-system-count
495
496 if (stream_num < 128)
497 bitrate[stream_num] = leak_rate;
498
499 for (i=0; i<stream_ct; i++){
500 get_le16(pb);
501 ext_len = get_le16(pb);
502 url_fseek(pb, ext_len, SEEK_CUR);
503 }
504
505 for (i=0; i<payload_ext_ct; i++){
506 get_guid(pb, &g);
507 ext_d=get_le16(pb);
508 ext_len=get_le32(pb);
509 url_fseek(pb, ext_len, SEEK_CUR);
510 }
511
512 // there could be a optional stream properties object to follow
513 // if so the next iteration will pick it up
514 } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
515 int v1, v2;
516 get_guid(pb, &g);
517 v1 = get_le32(pb);
518 v2 = get_le16(pb);
519 #if 0
520 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
521 int len, v1, n, num;
522 char str[256], *q;
523 char tag[16];
524
525 get_guid(pb, &g);
526 print_guid(&g);
527
528 n = get_le32(pb);
529 for(i=0;i<n;i++) {
530 num = get_le16(pb); /* stream number */
531 get_str16(pb, str, sizeof(str));
532 get_str16(pb, str, sizeof(str));
533 len = get_le16(pb);
534 q = tag;
535 while (len > 0) {
536 v1 = get_byte(pb);
537 if ((q - tag) < sizeof(tag) - 1)
538 *q++ = v1;
539 len--;
540 }
541 *q = '\0';
542 }
543 #endif
544 } else if (url_feof(pb)) {
545 return -1;
546 } else {
547 if (!s->keylen) {
548 if (!guidcmp(&g, &ff_asf_content_encryption)) {
549 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
550 } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) {
551 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
552 } else if (!guidcmp(&g, &ff_asf_digital_signature)) {
553 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
554 }
555 }
556 url_fseek(pb, gsize - 24, SEEK_CUR);
557 }
558 }
559 get_guid(pb, &g);
560 get_le64(pb);
561 get_byte(pb);
562 get_byte(pb);
563 if (url_feof(pb))
564 return -1;
565 asf->data_offset = url_ftell(pb);
566 asf->packet_size_left = 0;
567
568
569 for(i=0; i<128; i++){
570 int stream_num= asf->asfid2avid[i];
571 if(stream_num>=0){
572 AVStream *st = s->streams[stream_num];
573 if (!st->codec->bit_rate)
574 st->codec->bit_rate = bitrate[i];
575 if (dar[i].num > 0 && dar[i].den > 0)
576 av_reduce(&st->sample_aspect_ratio.num,
577 &st->sample_aspect_ratio.den,
578 dar[i].num, dar[i].den, INT_MAX);
579 //av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
580
581 // copy and convert language codes to the frontend
582 if (asf->streams[i].stream_language_index < 128) {
583 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
584 if (rfc1766 && strlen(rfc1766) > 1) {
585 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
586 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
587 if (iso6392)
588 av_metadata_set(&st->metadata, "language", iso6392);
589 }
590 }
591 }
592 }
593
594 return 0;
595 }
596
597 #define DO_2BITS(bits, var, defval) \
598 switch (bits & 3) \
599 { \
600 case 3: var = get_le32(pb); rsize += 4; break; \
601 case 2: var = get_le16(pb); rsize += 2; break; \
602 case 1: var = get_byte(pb); rsize++; break; \
603 default: var = defval; break; \
604 }
605
606 /**
607 * Load a single ASF packet into the demuxer.
608 * @param s demux context
609 * @param pb context to read data from
610 * @returns 0 on success, <0 on error
611 */
612 static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
613 {
614 ASFContext *asf = s->priv_data;
615 uint32_t packet_length, padsize;
616 int rsize = 8;
617 int c, d, e, off;
618
619 // if we do not know packet size, allow skipping up to 32 kB
620 off= 32768;
621 if (s->packet_size > 0)
622 off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
623
624 c=d=e=-1;
625 while(off-- > 0){
626 c=d; d=e;
627 e= get_byte(pb);
628 if(c == 0x82 && !d && !e)
629 break;
630 }
631
632 if (c != 0x82) {
633 /**
634 * This code allows handling of -EAGAIN at packet boundaries (i.e.
635 * if the packet sync code above triggers -EAGAIN). This does not
636 * imply complete -EAGAIN handling support at random positions in
637 * the stream.
638 */
639 if (url_ferror(pb) == AVERROR(EAGAIN))
640 return AVERROR(EAGAIN);
641 if (!url_feof(pb))
642 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
643 }
644 if ((c & 0x8f) == 0x82) {
645 if (d || e) {
646 if (!url_feof(pb))
647 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
648 return -1;
649 }
650 c= get_byte(pb);
651 d= get_byte(pb);
652 rsize+=3;
653 }else{
654 url_fseek(pb, -1, SEEK_CUR); //FIXME
655 }
656
657 asf->packet_flags = c;
658 asf->packet_property = d;
659
660 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
661 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
662 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
663
664 //the following checks prevent overflows and infinite loops
665 if(!packet_length || packet_length >= (1U<<29)){
666 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
667 return -1;
668 }
669 if(padsize >= packet_length){
670 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
671 return -1;
672 }
673
674 asf->packet_timestamp = get_le32(pb);
675 get_le16(pb); /* duration */
676 // rsize has at least 11 bytes which have to be present
677
678 if (asf->packet_flags & 0x01) {
679 asf->packet_segsizetype = get_byte(pb); rsize++;
680 asf->packet_segments = asf->packet_segsizetype & 0x3f;
681 } else {
682 asf->packet_segments = 1;
683 asf->packet_segsizetype = 0x80;
684 }
685 asf->packet_size_left = packet_length - padsize - rsize;
686 if (packet_length < asf->hdr.min_pktsize)
687 padsize += asf->hdr.min_pktsize - packet_length;
688 asf->packet_padsize = padsize;
689 dprintf(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
690 return 0;
691 }
692
693 /**
694 *
695 * @return <0 if error
696 */
697 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
698 ASFContext *asf = s->priv_data;
699 int rsize = 1;
700 int num = get_byte(pb);
701 int64_t ts0, ts1;
702
703 asf->packet_segments--;
704 asf->packet_key_frame = num >> 7;
705 asf->stream_index = asf->asfid2avid[num & 0x7f];
706 // sequence should be ignored!
707 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
708 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
709 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
710 //printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
711 if (asf->packet_replic_size >= 8) {
712 asf->packet_obj_size = get_le32(pb);
713 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
714 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
715 return -1;
716 }
717 asf->packet_frag_timestamp = get_le32(pb); // timestamp
718 if(asf->packet_replic_size >= 8+38+4){
719 // for(i=0; i<asf->packet_replic_size-8; i++)
720 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
721 // av_log(s, AV_LOG_DEBUG, "\n");
722 url_fskip(pb, 10);
723 ts0= get_le64(pb);
724 ts1= get_le64(pb);
725 url_fskip(pb, 12);
726 get_le32(pb);
727 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
728 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
729 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
730 }else
731 url_fskip(pb, asf->packet_replic_size - 8);
732 rsize += asf->packet_replic_size; // FIXME - check validity
733 } else if (asf->packet_replic_size==1){
734 // multipacket - frag_offset is beginning timestamp
735 asf->packet_time_start = asf->packet_frag_offset;
736 asf->packet_frag_offset = 0;
737 asf->packet_frag_timestamp = asf->packet_timestamp;
738
739 asf->packet_time_delta = get_byte(pb);
740 rsize++;
741 }else if(asf->packet_replic_size!=0){
742 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
743 return -1;
744 }
745 if (asf->packet_flags & 0x01) {
746 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
747 if(asf->packet_frag_size > asf->packet_size_left - rsize){
748 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
749 return -1;
750 }
751 //printf("Fragsize %d\n", asf->packet_frag_size);
752 } else {
753 asf->packet_frag_size = asf->packet_size_left - rsize;
754 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
755 }
756 if (asf->packet_replic_size == 1) {
757 asf->packet_multi_size = asf->packet_frag_size;
758 if (asf->packet_multi_size > asf->packet_size_left)
759 return -1;
760 }
761 asf->packet_size_left -= rsize;
762 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
763
764 return 0;
765 }
766
767 /**
768 * Parse data from individual ASF packets (which were previously loaded
769 * with asf_get_packet()).
770 * @param s demux context
771 * @param pb context to read data from
772 * @param pkt pointer to store packet data into
773 * @returns 0 if data was stored in pkt, <0 on error or 1 if more ASF
774 * packets need to be loaded (through asf_get_packet())
775 */
776 static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
777 {
778 ASFContext *asf = s->priv_data;
779 ASFStream *asf_st = 0;
780 for (;;) {
781 if(url_feof(pb))
782 return AVERROR_EOF;
783 if (asf->packet_size_left < FRAME_HEADER_SIZE
784 || asf->packet_segments < 1) {
785 //asf->packet_size_left <= asf->packet_padsize) {
786 int ret = asf->packet_size_left + asf->packet_padsize;
787 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
788 assert(ret>=0);
789 /* fail safe */
790 url_fskip(pb, ret);
791
792 asf->packet_pos= url_ftell(pb);
793 if (asf->data_object_size != (uint64_t)-1 &&
794 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
795 return AVERROR_EOF; /* Do not exceed the size of the data object */
796 return 1;
797 }
798 if (asf->packet_time_start == 0) {
799 if(asf_read_frame_header(s, pb) < 0){
800 asf->packet_segments= 0;
801 continue;
802 }
803 if (asf->stream_index < 0
804 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
805 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
806 ) {
807 asf->packet_time_start = 0;
808 /* unhandled packet (should not happen) */
809 url_fskip(pb, asf->packet_frag_size);
810 asf->packet_size_left -= asf->packet_frag_size;
811 if(asf->stream_index < 0)
812 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
813 continue;
814 }
815 asf->asf_st = s->streams[asf->stream_index]->priv_data;
816 }
817 asf_st = asf->asf_st;
818
819 if (asf->packet_replic_size == 1) {
820 // frag_offset is here used as the beginning timestamp
821 asf->packet_frag_timestamp = asf->packet_time_start;
822 asf->packet_time_start += asf->packet_time_delta;
823 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
824 asf->packet_size_left--;
825 asf->packet_multi_size--;
826 if (asf->packet_multi_size < asf->packet_obj_size)
827 {
828 asf->packet_time_start = 0;
829 url_fskip(pb, asf->packet_multi_size);
830 asf->packet_size_left -= asf->packet_multi_size;
831 continue;
832 }
833 asf->packet_multi_size -= asf->packet_obj_size;
834 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
835 }
836 if( /*asf->packet_frag_size == asf->packet_obj_size*/
837 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
838 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
839 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
840 asf_st->frag_offset, asf->packet_frag_size,
841 asf->packet_obj_size, asf_st->pkt.size);
842 asf->packet_obj_size= asf_st->pkt.size;
843 }
844
845 if ( asf_st->pkt.size != asf->packet_obj_size
846 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
847 if(asf_st->pkt.data){
848 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
849 asf_st->frag_offset = 0;
850 av_free_packet(&asf_st->pkt);
851 }
852 /* new packet */
853 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
854 asf_st->seq = asf->packet_seq;
855 asf_st->pkt.dts = asf->packet_frag_timestamp;
856 asf_st->pkt.stream_index = asf->stream_index;
857 asf_st->pkt.pos =
858 asf_st->packet_pos= asf->packet_pos;
859 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
860 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
861 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
862 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
863 asf->packet_key_frame = 1;
864 if (asf->packet_key_frame)
865 asf_st->pkt.flags |= PKT_FLAG_KEY;
866 }
867
868 /* read data */
869 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
870 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
871 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
872 asf->packet_size_left -= asf->packet_frag_size;
873 if (asf->packet_size_left < 0)
874 continue;
875
876 if( asf->packet_frag_offset >= asf_st->pkt.size
877 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
878 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
879 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
880 continue;
881 }
882
883 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
884 asf->packet_frag_size);
885 if (s->key && s->keylen == 20)
886 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
887 asf->packet_frag_size);
888 asf_st->frag_offset += asf->packet_frag_size;
889 /* test if whole packet is read */
890 if (asf_st->frag_offset == asf_st->pkt.size) {
891 //workaround for macroshit radio DVR-MS files
892 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
893 && asf_st->pkt.size > 100){
894 int i;
895 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
896 if(i == asf_st->pkt.size){
897 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
898 asf_st->frag_offset = 0;
899 av_free_packet(&asf_st->pkt);
900 continue;
901 }
902 }
903
904 /* return packet */
905 if (asf_st->ds_span > 1) {
906 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
907 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
908 }else{
909 /* packet descrambling */
910 uint8_t *newdata = av_malloc(asf_st->pkt.size);
911 if (newdata) {
912 int offset = 0;
913 while (offset < asf_st->pkt.size) {
914 int off = offset / asf_st->ds_chunk_size;
915 int row = off / asf_st->ds_span;
916 int col = off % asf_st->ds_span;
917 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
918 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
919
920 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
921 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
922 memcpy(newdata + offset,
923 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
924 asf_st->ds_chunk_size);
925 offset += asf_st->ds_chunk_size;
926 }
927 av_free(asf_st->pkt.data);
928 asf_st->pkt.data = newdata;
929 }
930 }
931 }
932 asf_st->frag_offset = 0;
933 *pkt= asf_st->pkt;
934 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
935 asf_st->pkt.size = 0;
936 asf_st->pkt.data = 0;
937 break; // packet completed
938 }
939 }
940 return 0;
941 }
942
943 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
944 {
945 ASFContext *asf = s->priv_data;
946
947 for (;;) {
948 int ret;
949
950 /* parse cached packets, if any */
951 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
952 return ret;
953 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
954 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
955 asf->packet_time_start = 0;
956 }
957
958 return 0;
959 }
960
961 // Added to support seeking after packets have been read
962 // If information is not reset, read_packet fails due to
963 // leftover information from previous reads
964 static void asf_reset_header(AVFormatContext *s)
965 {
966 ASFContext *asf = s->priv_data;
967 ASFStream *asf_st;
968 int i;
969
970 asf->packet_nb_frames = 0;
971 asf->packet_size_left = 0;
972 asf->packet_segments = 0;
973 asf->packet_flags = 0;
974 asf->packet_property = 0;
975 asf->packet_timestamp = 0;
976 asf->packet_segsizetype = 0;
977 asf->packet_segments = 0;
978 asf->packet_seq = 0;
979 asf->packet_replic_size = 0;
980 asf->packet_key_frame = 0;
981 asf->packet_padsize = 0;
982 asf->packet_frag_offset = 0;
983 asf->packet_frag_size = 0;
984 asf->packet_frag_timestamp = 0;
985 asf->packet_multi_size = 0;
986 asf->packet_obj_size = 0;
987 asf->packet_time_delta = 0;
988 asf->packet_time_start = 0;
989
990 for(i=0; i<s->nb_streams; i++){
991 asf_st= s->streams[i]->priv_data;
992 av_free_packet(&asf_st->pkt);
993 asf_st->frag_offset=0;
994 asf_st->seq=0;
995 }
996 asf->asf_st= NULL;
997 }
998
999 static int asf_read_close(AVFormatContext *s)
1000 {
1001 int i;
1002
1003 asf_reset_header(s);
1004 for(i=0;i<s->nb_streams;i++) {
1005 AVStream *st = s->streams[i];
1006 av_free(st->codec->palctrl);
1007 }
1008 return 0;
1009 }
1010
1011 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1012 {
1013 AVPacket pkt1, *pkt = &pkt1;
1014 ASFStream *asf_st;
1015 int64_t pts;
1016 int64_t pos= *ppos;
1017 int i;
1018 int64_t start_pos[s->nb_streams];
1019
1020 for(i=0; i<s->nb_streams; i++){
1021 start_pos[i]= pos;
1022 }
1023
1024 if (s->packet_size > 0)
1025 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1026 *ppos= pos;
1027 url_fseek(s->pb, pos, SEEK_SET);
1028
1029 //printf("asf_read_pts\n");
1030 asf_reset_header(s);
1031 for(;;){
1032 if (av_read_frame(s, pkt) < 0){
1033 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1034 return AV_NOPTS_VALUE;
1035 }
1036
1037 pts= pkt->pts;
1038
1039 av_free_packet(pkt);
1040 if(pkt->flags&PKT_FLAG_KEY){
1041 i= pkt->stream_index;
1042
1043 asf_st= s->streams[i]->priv_data;
1044
1045 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1046 pos= asf_st->packet_pos;
1047
1048 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1049 start_pos[i]= asf_st->packet_pos + 1;
1050
1051 if(pkt->stream_index == stream_index)
1052 break;
1053 }
1054 }
1055
1056 *ppos= pos;
1057 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1058
1059 return pts;
1060 }
1061
1062 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1063 {
1064 ff_asf_guid g;
1065 ASFContext *asf = s->priv_data;
1066 int64_t current_pos= url_ftell(s->pb);
1067 int i;
1068
1069 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1070 get_guid(s->pb, &g);
1071 if (!guidcmp(&g, &index_guid)) {
1072 int64_t itime, last_pos=-1;
1073 int pct, ict;
1074 int64_t av_unused gsize= get_le64(s->pb);
1075 get_guid(s->pb, &g);
1076 itime=get_le64(s->pb);
1077 pct=get_le32(s->pb);
1078 ict=get_le32(s->pb);
1079 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1080
1081 for (i=0;i<ict;i++){
1082 int pktnum=get_le32(s->pb);
1083 int pktct =get_le16(s->pb);
1084 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1085 int64_t index_pts= av_rescale(itime, i, 10000);
1086
1087 if(pos != last_pos){
1088 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1089 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1090 last_pos=pos;
1091 }
1092 }
1093 asf->index_read= 1;
1094 }
1095 url_fseek(s->pb, current_pos, SEEK_SET);
1096 }
1097
1098 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1099 {
1100 ASFContext *asf = s->priv_data;
1101 AVStream *st = s->streams[stream_index];
1102 int64_t pos;
1103 int index;
1104
1105 if (s->packet_size <= 0)
1106 return -1;
1107
1108 /* Try using the protocol's read_seek if available */
1109 if(s->pb) {
1110 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1111 if(ret >= 0)
1112 asf_reset_header(s);
1113 if (ret != AVERROR(ENOSYS))
1114 return ret;
1115 }
1116
1117 if (!asf->index_read)
1118 asf_build_simple_index(s, stream_index);
1119
1120 if(!(asf->index_read && st->index_entries)){
1121 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1122 return -1;
1123 }else{
1124 index= av_index_search_timestamp(st, pts, flags);
1125 if(index<0)
1126 return -1;
1127
1128 /* find the position */
1129 pos = st->index_entries[index].pos;
1130
1131 // various attempts to find key frame have failed so far
1132 // asf_reset_header(s);
1133 // url_fseek(s->pb, pos, SEEK_SET);
1134 // key_pos = pos;
1135 // for(i=0;i<16;i++){
1136 // pos = url_ftell(s->pb);
1137 // if (av_read_frame(s, &pkt) < 0){
1138 // av_log(s, AV_LOG_INFO, "seek failed\n");
1139 // return -1;
1140 // }
1141 // asf_st = s->streams[stream_index]->priv_data;
1142 // pos += st->parser->frame_offset;
1143 //
1144 // if (pkt.size > b) {
1145 // b = pkt.size;
1146 // key_pos = pos;
1147 // }
1148 //
1149 // av_free_packet(&pkt);
1150 // }
1151
1152 /* do the seek */
1153 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1154 url_fseek(s->pb, pos, SEEK_SET);
1155 }
1156 asf_reset_header(s);
1157 return 0;
1158 }
1159
1160 AVInputFormat asf_demuxer = {
1161 "asf",
1162 NULL_IF_CONFIG_SMALL("ASF format"),
1163 sizeof(ASFContext),
1164 asf_probe,
1165 asf_read_header,
1166 asf_read_packet,
1167 asf_read_close,
1168 asf_read_seek,
1169 asf_read_pts,
1170 .metadata_conv = ff_asf_metadata_conv,
1171 };