some url_is_streamed()==1 related fixes
[libav.git] / libavformat / asf.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * ASF compatible demuxer
19720f15 3 * Copyright (c) 2000, 2001 Fabrice Bellard.
de6d9b64 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
19720f15
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
FB
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
19720f15 17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 20 */
de6d9b64 21#include "avformat.h"
9d9f4119 22#include "riff.h"
f80c1ac0 23#include "mpegaudio.h"
542993b0 24#include "asf.h"
db5c43b4 25#include "common.h"
de6d9b64 26
580fb5e7
MN
27#undef NDEBUG
28#include <assert.h>
29
615b92fd 30#define FRAME_HEADER_SIZE 17
115329f1 31// Fix Me! FRAME_HEADER_SIZE may be different.
615b92fd 32
de6d9b64 33static const GUID index_guid = {
24c14d6d 34 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
de6d9b64
FB
35};
36
0e3b6a6f
RM
37static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
38 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
39};
de6d9b64
FB
40/**********************************/
41/* decoding */
42
43//#define DEBUG
44
45#ifdef DEBUG
5082f759
FR
46#define PRINT_IF_GUID(g,cmp) \
47if (!memcmp(g, &cmp, sizeof(GUID))) \
48 printf("(GUID: %s) ", #cmp)
49
de6d9b64
FB
50static void print_guid(const GUID *g)
51{
52 int i;
5082f759
FR
53 PRINT_IF_GUID(g, asf_header);
54 else PRINT_IF_GUID(g, file_header);
55 else PRINT_IF_GUID(g, stream_header);
56 else PRINT_IF_GUID(g, audio_stream);
57 else PRINT_IF_GUID(g, audio_conceal_none);
58 else PRINT_IF_GUID(g, video_stream);
59 else PRINT_IF_GUID(g, video_conceal_none);
ae38261e 60 else PRINT_IF_GUID(g, command_stream);
5082f759
FR
61 else PRINT_IF_GUID(g, comment_header);
62 else PRINT_IF_GUID(g, codec_comment_header);
63 else PRINT_IF_GUID(g, codec_comment1_header);
64 else PRINT_IF_GUID(g, data_header);
65 else PRINT_IF_GUID(g, index_guid);
66 else PRINT_IF_GUID(g, head1_guid);
67 else PRINT_IF_GUID(g, head2_guid);
68 else PRINT_IF_GUID(g, my_guid);
88141c91
MN
69 else PRINT_IF_GUID(g, ext_stream_header);
70 else PRINT_IF_GUID(g, extended_content_header);
71 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
72 else PRINT_IF_GUID(g, ext_stream_audio_stream);
30e88789 73 else PRINT_IF_GUID(g, metadata_header);
0e3b6a6f 74 else PRINT_IF_GUID(g, stream_bitrate_guid);
5082f759
FR
75 else
76 printf("(GUID: unknown) ");
24c14d6d
MN
77 for(i=0;i<16;i++)
78 printf(" 0x%02x,", (*g)[i]);
de6d9b64
FB
79 printf("}\n");
80}
6df84c3a 81#undef PRINT_IF_GUID
de6d9b64
FB
82#endif
83
84static void get_guid(ByteIOContext *s, GUID *g)
85{
24c14d6d
MN
86 assert(sizeof(*g) == 16);
87 get_buffer(s, g, sizeof(*g));
de6d9b64
FB
88}
89
90#if 0
91static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
92{
93 int len, c;
94 char *q;
95
96 len = get_le16(pb);
97 q = buf;
98 while (len > 0) {
99 c = get_le16(pb);
100 if ((q - buf) < buf_size - 1)
101 *q++ = c;
102 len--;
103 }
104 *q = '\0';
105}
106#endif
107
108static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
109{
db5c43b4
ZM
110 char* q = buf;
111 len /= 2;
112 while (len--) {
113 uint8_t tmp;
114 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
de6d9b64
FB
115 }
116 *q = '\0';
117}
118
c9a65ca8
FB
119static int asf_probe(AVProbeData *pd)
120{
c9a65ca8
FB
121 /* check file header */
122 if (pd->buf_size <= 32)
123 return 0;
c9a65ca8 124
24c14d6d 125 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
c9a65ca8
FB
126 return AVPROBE_SCORE_MAX;
127 else
128 return 0;
129}
130
30e88789
MN
131static int get_value(ByteIOContext *pb, int type){
132 switch(type){
133 case 2: return get_le32(pb);
134 case 3: return get_le32(pb);
135 case 4: return get_le64(pb);
136 case 5: return get_le16(pb);
137 default:return INT_MIN;
138 }
139}
140
de6d9b64
FB
141static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
142{
c9a65ca8 143 ASFContext *asf = s->priv_data;
de6d9b64
FB
144 GUID g;
145 ByteIOContext *pb = &s->pb;
146 AVStream *st;
147 ASFStream *asf_st;
e095026a 148 int size, i;
0c1a9eda 149 int64_t gsize;
30e88789
MN
150 AVRational dar[128];
151
152 memset(dar, 0, sizeof(dar));
de6d9b64 153
de6d9b64
FB
154 get_guid(pb, &g);
155 if (memcmp(&g, &asf_header, sizeof(GUID)))
156 goto fail;
157 get_le64(pb);
158 get_le32(pb);
159 get_byte(pb);
160 get_byte(pb);
2141dc37 161 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
de6d9b64
FB
162 for(;;) {
163 get_guid(pb, &g);
164 gsize = get_le64(pb);
165#ifdef DEBUG
949b1a13 166 printf("%08"PRIx64": ", url_ftell(pb) - 24);
de6d9b64 167 print_guid(&g);
949b1a13 168 printf(" size=0x%"PRIx64"\n", gsize);
de6d9b64
FB
169#endif
170 if (gsize < 24)
171 goto fail;
172 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b 173 get_guid(pb, &asf->hdr.guid);
bb270c08
DB
174 asf->hdr.file_size = get_le64(pb);
175 asf->hdr.create_time = get_le64(pb);
6bb2a2df 176 asf->nb_packets = get_le64(pb);
bb270c08
DB
177 asf->hdr.send_time = get_le64(pb);
178 asf->hdr.play_time = get_le64(pb);
179 asf->hdr.preroll = get_le32(pb);
180 asf->hdr.ignore = get_le32(pb);
181 asf->hdr.flags = get_le32(pb);
182 asf->hdr.min_pktsize = get_le32(pb);
183 asf->hdr.max_pktsize = get_le32(pb);
184 asf->hdr.max_bitrate = get_le32(pb);
185 asf->packet_size = asf->hdr.max_pktsize;
de6d9b64 186 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
7ad5455c
MN
187 int type, type_specific_size, sizeX;
188 uint64_t total_size;
de6d9b64 189 unsigned int tag1;
0c1a9eda 190 int64_t pos1, pos2;
88141c91 191 int test_for_ext_stream_audio;
2a10020b 192
de6d9b64
FB
193 pos1 = url_ftell(pb);
194
247eadca 195 st = av_new_stream(s, 0);
de6d9b64
FB
196 if (!st)
197 goto fail;
9ee91c2f 198 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
de6d9b64
FB
199 asf_st = av_mallocz(sizeof(ASFStream));
200 if (!asf_st)
201 goto fail;
202 st->priv_data = asf_st;
c0df9d75 203 st->start_time = asf->hdr.preroll;
73fe1052
RM
204 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
205 st->duration = asf->hdr.send_time /
206 (10000000 / 1000) - st->start_time;
207 }
de6d9b64 208 get_guid(pb, &g);
88141c91
MN
209
210 test_for_ext_stream_audio = 0;
de6d9b64
FB
211 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
212 type = CODEC_TYPE_AUDIO;
213 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
214 type = CODEC_TYPE_VIDEO;
ae38261e
MB
215 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
216 type = CODEC_TYPE_UNKNOWN;
88141c91
MN
217 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
218 test_for_ext_stream_audio = 1;
219 type = CODEC_TYPE_UNKNOWN;
de6d9b64
FB
220 } else {
221 goto fail;
222 }
223 get_guid(pb, &g);
224 total_size = get_le64(pb);
2e7973bb 225 type_specific_size = get_le32(pb);
de6d9b64 226 get_le32(pb);
bb270c08 227 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 228 // mapping of asf ID to AV stream ID;
247eadca 229 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 230
de6d9b64 231 get_le32(pb);
88141c91
MN
232
233 if (test_for_ext_stream_audio) {
234 get_guid(pb, &g);
235 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
236 type = CODEC_TYPE_AUDIO;
237 get_guid(pb, &g);
238 get_le32(pb);
239 get_le32(pb);
240 get_le32(pb);
241 get_guid(pb, &g);
242 get_le32(pb);
243 }
244 }
245
bb270c08 246 st->codec->codec_type = type;
de6d9b64 247 if (type == CODEC_TYPE_AUDIO) {
01f4895c 248 get_wav_header(pb, st->codec, type_specific_size);
afda223c 249 st->need_parsing = 1;
bb270c08
DB
250 /* We have to init the frame size at some point .... */
251 pos2 = url_ftell(pb);
b9c6d01b 252 if (gsize >= (pos2 + 8 - pos1 + 24)) {
bb270c08
DB
253 asf_st->ds_span = get_byte(pb);
254 asf_st->ds_packet_size = get_le16(pb);
255 asf_st->ds_chunk_size = get_le16(pb);
6bb2a2df
MN
256 get_le16(pb); //ds_data_size
257 get_byte(pb); //ds_silence_data
bb270c08
DB
258 }
259 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
260 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
261 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
262 if (asf_st->ds_span > 1) {
263 if (!asf_st->ds_chunk_size
05219463
MN
264 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
265 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
bb270c08
DB
266 asf_st->ds_span = 0; // disable descrambling
267 }
01f4895c 268 switch (st->codec->codec_id) {
80783dc2 269 case CODEC_ID_MP3:
01f4895c 270 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
271 break;
272 case CODEC_ID_PCM_S16LE:
273 case CODEC_ID_PCM_S16BE:
274 case CODEC_ID_PCM_U16LE:
275 case CODEC_ID_PCM_U16BE:
276 case CODEC_ID_PCM_S8:
277 case CODEC_ID_PCM_U8:
278 case CODEC_ID_PCM_ALAW:
279 case CODEC_ID_PCM_MULAW:
01f4895c 280 st->codec->frame_size = 1;
f80c1ac0
PG
281 break;
282 default:
283 /* This is probably wrong, but it prevents a crash later */
01f4895c 284 st->codec->frame_size = 1;
f80c1ac0
PG
285 break;
286 }
88141c91 287 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 288 get_le32(pb);
de6d9b64
FB
289 get_le32(pb);
290 get_byte(pb);
291 size = get_le16(pb); /* size */
0ffd77b9 292 sizeX= get_le32(pb); /* size */
01f4895c 293 st->codec->width = get_le32(pb);
bb270c08 294 st->codec->height = get_le32(pb);
2a10020b 295 /* not available for asf */
de6d9b64 296 get_le16(pb); /* panes */
bb270c08 297 st->codec->bits_per_sample = get_le16(pb); /* depth */
de6d9b64 298 tag1 = get_le32(pb);
bb270c08 299 url_fskip(pb, 20);
0ffd77b9
MN
300// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
301 size= sizeX;
bb270c08
DB
302 if (size > 40) {
303 st->codec->extradata_size = size - 40;
304 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
305 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
306 }
5e29abf8
RT
307
308 /* Extract palette from extradata if bpp <= 8 */
309 /* This code assumes that extradata contains only palette */
310 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
311 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
312 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 313#ifdef WORDS_BIGENDIAN
01f4895c
MN
314 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
315 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 316#else
01f4895c
MN
317 memcpy(st->codec->palctrl->palette, st->codec->extradata,
318 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 319#endif
01f4895c 320 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
321 }
322
01f4895c 323 st->codec->codec_tag = tag1;
bb270c08 324 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4
MN
325 if(tag1 == MKTAG('D', 'V', 'R', ' '))
326 st->need_parsing = 1;
de6d9b64
FB
327 }
328 pos2 = url_ftell(pb);
329 url_fskip(pb, gsize - (pos2 - pos1 + 24));
330 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
b6eaae39 331 asf->data_object_offset = url_ftell(pb);
73fe1052
RM
332 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
333 if (!(asf->hdr.flags & 0x01) && gsize != (uint64_t)-1 && gsize >= 24) {
b6eaae39
KED
334 asf->data_object_size = gsize - 24;
335 } else {
336 asf->data_object_size = (uint64_t)-1;
337 }
de6d9b64
FB
338 break;
339 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
340 int len1, len2, len3, len4, len5;
341
342 len1 = get_le16(pb);
343 len2 = get_le16(pb);
344 len3 = get_le16(pb);
345 len4 = get_le16(pb);
346 len5 = get_le16(pb);
4e15cc8b
MN
347 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
348 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
de6d9b64 349 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
4e15cc8b 350 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
bb270c08 351 url_fskip(pb, len5);
0e3b6a6f
RM
352 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
353 int stream_count = get_le16(pb);
354 int j;
355
356// av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
357// av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
358 for(j = 0; j < stream_count; j++) {
359 int flags, bitrate, stream_id;
360
361 flags= get_le16(pb);
362 bitrate= get_le32(pb);
363 stream_id= (flags & 0x7f);
364// av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
365 asf->stream_bitrates[stream_id-1]= bitrate;
366 }
d13431cd
KK
367 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
368 int desc_count, i;
369
370 desc_count = get_le16(pb);
371 for(i=0;i<desc_count;i++)
372 {
052aa2ad
SH
373 int name_len,value_type,value_len;
374 uint64_t value_num = 0;
d045b8c1 375 char name[1024];
d13431cd
KK
376
377 name_len = get_le16(pb);
d045b8c1 378 get_str16_nolen(pb, name_len, name, sizeof(name));
d13431cd
KK
379 value_type = get_le16(pb);
380 value_len = get_le16(pb);
381 if ((value_type == 0) || (value_type == 1)) // unicode or byte
382 {
5e2a4855
MN
383 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
384 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
385 else url_fskip(pb, value_len);
d13431cd 386 }
724dc20c 387 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
d13431cd 388 {
30e88789 389 value_num= get_value(pb, value_type);
4e15cc8b
MN
390 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
391 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
d13431cd 392 }
d13431cd 393 }
30e88789
MN
394 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
395 int n, stream_num, name_len, value_len, value_type, value_num;
396 n = get_le16(pb);
397
398 for(i=0;i<n;i++) {
399 char name[1024];
400
401 get_le16(pb); //lang_list_index
402 stream_num= get_le16(pb);
403 name_len= get_le16(pb);
404 value_type= get_le16(pb);
405 value_len= get_le32(pb);
406
407 get_str16_nolen(pb, name_len, name, sizeof(name));
408//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
409 value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
410 url_fskip(pb, value_len - 2);
411
412 if(stream_num<128){
413 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
414 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
415 }
416 }
88141c91
MN
417 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
418 int ext_len, payload_ext_ct, stream_ct;
419 uint32_t ext_d;
1bd86246 420 int64_t pos_ex_st;
88141c91
MN
421 pos_ex_st = url_ftell(pb);
422
de3ae959
MN
423 get_le64(pb); // starttime
424 get_le64(pb); // endtime
425 get_le32(pb); // leak-datarate
426 get_le32(pb); // bucket-datasize
427 get_le32(pb); // init-bucket-fullness
428 get_le32(pb); // alt-leak-datarate
429 get_le32(pb); // alt-bucket-datasize
430 get_le32(pb); // alt-init-bucket-fullness
431 get_le32(pb); // max-object-size
432 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
433 get_le16(pb); // stream-num
434 get_le16(pb); // stream-language-id-index
435 get_le64(pb); // avg frametime in 100ns units
436 stream_ct = get_le16(pb); //stream-name-count
437 payload_ext_ct = get_le16(pb); //payload-extension-system-count
88141c91
MN
438
439 for (i=0; i<stream_ct; i++){
440 get_le16(pb);
441 ext_len = get_le16(pb);
442 url_fseek(pb, ext_len, SEEK_CUR);
443 }
444
445 for (i=0; i<payload_ext_ct; i++){
446 get_guid(pb, &g);
447 ext_d=get_le16(pb);
448 ext_len=get_le32(pb);
449 url_fseek(pb, ext_len, SEEK_CUR);
450 }
451
452 // there could be a optional stream properties object to follow
453 // if so the next iteration will pick it up
de6d9b64
FB
454 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
455 int v1, v2;
456 get_guid(pb, &g);
457 v1 = get_le32(pb);
458 v2 = get_le16(pb);
88141c91 459#if 0
de6d9b64
FB
460 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
461 int len, v1, n, num;
462 char str[256], *q;
463 char tag[16];
464
465 get_guid(pb, &g);
466 print_guid(&g);
2a10020b 467
de6d9b64
FB
468 n = get_le32(pb);
469 for(i=0;i<n;i++) {
470 num = get_le16(pb); /* stream number */
471 get_str16(pb, str, sizeof(str));
472 get_str16(pb, str, sizeof(str));
473 len = get_le16(pb);
474 q = tag;
475 while (len > 0) {
476 v1 = get_byte(pb);
477 if ((q - tag) < sizeof(tag) - 1)
478 *q++ = v1;
479 len--;
480 }
481 *q = '\0';
482 }
483#endif
484 } else if (url_feof(pb)) {
485 goto fail;
486 } else {
487 url_fseek(pb, gsize - 24, SEEK_CUR);
488 }
489 }
490 get_guid(pb, &g);
491 get_le64(pb);
492 get_byte(pb);
493 get_byte(pb);
2141dc37
ZK
494 if (url_feof(pb))
495 goto fail;
496 asf->data_offset = url_ftell(pb);
de6d9b64
FB
497 asf->packet_size_left = 0;
498
30e88789
MN
499
500 for(i=0; i<128; i++){
501 int stream_num= asf->asfid2avid[i];
502 if(stream_num>=0 && dar[i].num>0 && dar[i].den>0){
503 AVCodecContext *codec= s->streams[stream_num]->codec;
a836a2c8
ZM
504 av_reduce(&codec->sample_aspect_ratio.num,
505 &codec->sample_aspect_ratio.den,
506 dar[i].num, dar[i].den, INT_MAX);
30e88789
MN
507//av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
508 }
509 }
510
de6d9b64
FB
511 return 0;
512
513 fail:
4c3dff6d 514 for(i=0;i<s->nb_streams;i++) {
de6d9b64 515 AVStream *st = s->streams[i];
bb270c08
DB
516 if (st) {
517 av_free(st->priv_data);
01f4895c 518 av_free(st->codec->extradata);
bb270c08 519 }
1ea4f593 520 av_free(st);
de6d9b64 521 }
de6d9b64
FB
522 return -1;
523}
524
2a10020b
ZK
525#define DO_2BITS(bits, var, defval) \
526 switch (bits & 3) \
527 { \
528 case 3: var = get_le32(pb); rsize += 4; break; \
529 case 2: var = get_le16(pb); rsize += 2; break; \
530 case 1: var = get_byte(pb); rsize++; break; \
531 default: var = defval; break; \
532 }
533
f7835507
MN
534/**
535 *
536 * @return <0 in case of an error
537 */
de6d9b64
FB
538static int asf_get_packet(AVFormatContext *s)
539{
540 ASFContext *asf = s->priv_data;
541 ByteIOContext *pb = &s->pb;
2a10020b 542 uint32_t packet_length, padsize;
29962fea 543 int rsize = 9;
0fd9e6f3
MN
544 int c, d, e, off;
545
546 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
547
548 c=d=e=-1;
549 while(off-- > 0){
550 c=d; d=e;
551 e= get_byte(pb);
552 if(c == 0x82 && !d && !e)
553 break;
554 }
115329f1 555
1359c2d4 556 if (c != 0x82) {
5acdd6e6 557 if (!url_feof(pb))
bb270c08 558 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b
ZK
559 }
560 if ((c & 0x0f) == 2) { // always true for now
0fd9e6f3 561 if (d || e) {
5acdd6e6 562 if (!url_feof(pb))
bb270c08 563 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 564 return -1;
bb270c08 565 }
0fd9e6f3
MN
566 d= get_byte(pb);
567 e= get_byte(pb);
29962fea
MN
568 rsize+=2;
569/* }else{
570 if (!url_feof(pb))
949b1a13 571 printf("ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
bb270c08 572 return AVERROR_IO;*/
de6d9b64 573 }
2a10020b 574
0fd9e6f3
MN
575 asf->packet_flags = d;
576 asf->packet_property = e;
2a10020b
ZK
577
578 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
579 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
580 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
581
5b11e081
MN
582 //the following checks prevent overflows and infinite loops
583 if(packet_length >= (1U<<29)){
584 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 585 return -1;
5b11e081 586 }
92216453 587 if(padsize >= packet_length){
5b11e081 588 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 589 return -1;
5b11e081
MN
590 }
591
2a10020b 592 asf->packet_timestamp = get_le32(pb);
de6d9b64 593 get_le16(pb); /* duration */
2141dc37 594 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
595
596 if (asf->packet_flags & 0x01) {
bb270c08 597 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
598 asf->packet_segments = asf->packet_segsizetype & 0x3f;
599 } else {
bb270c08 600 asf->packet_segments = 1;
2a10020b
ZK
601 asf->packet_segsizetype = 0x80;
602 }
603 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
604 if (packet_length < asf->hdr.min_pktsize)
605 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 606 asf->packet_padsize = padsize;
de6d9b64 607#ifdef DEBUG
2a10020b 608 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 609#endif
de6d9b64
FB
610 return 0;
611}
612
ae60a857
MN
613/**
614 *
615 * @return <0 if error
616 */
617static int asf_read_frame_header(AVFormatContext *s){
618 ASFContext *asf = s->priv_data;
619 ByteIOContext *pb = &s->pb;
620 int rsize = 1;
621 int num = get_byte(pb);
559a55ad 622 int64_t ts0, ts1;
ae60a857
MN
623
624 asf->packet_segments--;
625 asf->packet_key_frame = num >> 7;
626 asf->stream_index = asf->asfid2avid[num & 0x7f];
627 // sequence should be ignored!
628 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
629 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
630 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
631//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);
632 if (asf->packet_replic_size >= 8) {
633 asf->packet_obj_size = get_le32(pb);
634 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
635 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
636 return -1;
637 }
638 asf->packet_frag_timestamp = get_le32(pb); // timestamp
559a55ad
MN
639 if(asf->packet_replic_size >= 8+38+4){
640// for(i=0; i<asf->packet_replic_size-8; i++)
641// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
642// av_log(s, AV_LOG_DEBUG, "\n");
643 url_fskip(pb, 10);
644 ts0= get_le64(pb);
645 ts1= get_le64(pb);
646 url_fskip(pb, 12);
647 get_le32(pb);
648 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
649 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
650 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
651 }else
652 url_fskip(pb, asf->packet_replic_size - 8);
ae60a857
MN
653 rsize += asf->packet_replic_size; // FIXME - check validity
654 } else if (asf->packet_replic_size==1){
655 // multipacket - frag_offset is begining timestamp
656 asf->packet_time_start = asf->packet_frag_offset;
657 asf->packet_frag_offset = 0;
658 asf->packet_frag_timestamp = asf->packet_timestamp;
659
660 asf->packet_time_delta = get_byte(pb);
661 rsize++;
662 }else if(asf->packet_replic_size!=0){
663 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
664 return -1;
665 }
666 if (asf->packet_flags & 0x01) {
667 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
668 if(asf->packet_frag_size > asf->packet_size_left - rsize){
669 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
670 return -1;
671 }
ae60a857
MN
672 //printf("Fragsize %d\n", asf->packet_frag_size);
673 } else {
674 asf->packet_frag_size = asf->packet_size_left - rsize;
675 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
676 }
677 if (asf->packet_replic_size == 1) {
678 asf->packet_multi_size = asf->packet_frag_size;
679 if (asf->packet_multi_size > asf->packet_size_left)
680 return -1;
681 }
682 asf->packet_size_left -= rsize;
683 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
684
685 return 0;
686}
687
de6d9b64
FB
688static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
689{
690 ASFContext *asf = s->priv_data;
2a10020b 691 ASFStream *asf_st = 0;
de6d9b64 692 ByteIOContext *pb = &s->pb;
1359c2d4 693 //static int pc = 0;
2a10020b 694 for (;;) {
ceba96cb
MN
695 if(url_feof(pb))
696 return AVERROR_IO;
bb270c08
DB
697 if (asf->packet_size_left < FRAME_HEADER_SIZE
698 || asf->packet_segments < 1) {
699 //asf->packet_size_left <= asf->packet_padsize) {
700 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 701 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 702 assert(ret>=0);
bb270c08
DB
703 /* fail safe */
704 url_fskip(pb, ret);
b04d5d31 705
82b9e4a2 706 asf->packet_pos= url_ftell(&s->pb);
b6eaae39
KED
707 if (asf->data_object_size != (uint64_t)-1 &&
708 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
709 return AVERROR_IO; /* Do not exceed the size of the data object */
bb270c08
DB
710 ret = asf_get_packet(s);
711 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
ceba96cb
MN
712 if (ret < 0)
713 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
2141dc37 714 asf->packet_time_start = 0;
2a10020b 715 continue;
bb270c08
DB
716 }
717 if (asf->packet_time_start == 0) {
ae60a857
MN
718 if(asf_read_frame_header(s) < 0){
719 asf->packet_segments= 0;
236116cb 720 continue;
1305a9d5 721 }
bb270c08 722 if (asf->stream_index < 0
f3356e9c
MN
723 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
724 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
725 ) {
1359c2d4 726 asf->packet_time_start = 0;
bb270c08
DB
727 /* unhandled packet (should not happen) */
728 url_fskip(pb, asf->packet_frag_size);
729 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 730 if(asf->stream_index < 0)
ae60a857 731 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 732 continue;
bb270c08
DB
733 }
734 asf->asf_st = s->streams[asf->stream_index]->priv_data;
735 }
736 asf_st = asf->asf_st;
737
bb270c08
DB
738 if (asf->packet_replic_size == 1) {
739 // frag_offset is here used as the begining timestamp
740 asf->packet_frag_timestamp = asf->packet_time_start;
741 asf->packet_time_start += asf->packet_time_delta;
742 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
743 asf->packet_size_left--;
2141dc37 744 asf->packet_multi_size--;
bb270c08
DB
745 if (asf->packet_multi_size < asf->packet_obj_size)
746 {
747 asf->packet_time_start = 0;
748 url_fskip(pb, asf->packet_multi_size);
749 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 750 continue;
bb270c08
DB
751 }
752 asf->packet_multi_size -= asf->packet_obj_size;
753 //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);
754 }
f8f0a0bd
MN
755 if ( asf_st->pkt.size != asf->packet_obj_size
756 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
200026aa
MN
757 if(asf_st->pkt.data){
758 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
759 asf_st->frag_offset = 0;
760 av_free_packet(&asf_st->pkt);
761 }
bb270c08
DB
762 /* new packet */
763 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
764 asf_st->seq = asf->packet_seq;
765 asf_st->pkt.pts = asf->packet_frag_timestamp;
766 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
767 asf_st->pkt.pos =
768 asf_st->packet_pos= asf->packet_pos;
769//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 770//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 771//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
772 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
773 asf->packet_key_frame = 1;
774 if (asf->packet_key_frame)
775 asf_st->pkt.flags |= PKT_FLAG_KEY;
776 }
777
778 /* read data */
779 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
780 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
781 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
782 asf->packet_size_left -= asf->packet_frag_size;
783 if (asf->packet_size_left < 0)
2141dc37 784 continue;
4c71d727
MN
785
786 if( asf->packet_frag_offset >= asf_st->pkt.size
787 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
788 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
789 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
790 continue;
791 }
792
bb270c08
DB
793 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
794 asf->packet_frag_size);
795 asf_st->frag_offset += asf->packet_frag_size;
796 /* test if whole packet is read */
797 if (asf_st->frag_offset == asf_st->pkt.size) {
798 /* return packet */
799 if (asf_st->ds_span > 1) {
05219463
MN
800 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
801 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
802 }else{
bb270c08 803 /* packet descrambling */
191e8ca7 804 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
805 if (newdata) {
806 int offset = 0;
807 while (offset < asf_st->pkt.size) {
808 int off = offset / asf_st->ds_chunk_size;
809 int row = off / asf_st->ds_span;
810 int col = off % asf_st->ds_span;
811 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
812 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
813
814 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
815 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
816 memcpy(newdata + offset,
817 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
818 asf_st->ds_chunk_size);
819 offset += asf_st->ds_chunk_size;
820 }
821 av_free(asf_st->pkt.data);
822 asf_st->pkt.data = newdata;
823 }
05219463 824 }
bb270c08
DB
825 }
826 asf_st->frag_offset = 0;
b83e83b9 827 *pkt= asf_st->pkt;
bb270c08
DB
828 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
829 asf_st->pkt.size = 0;
830 asf_st->pkt.data = 0;
831 break; // packet completed
832 }
de6d9b64 833 }
de6d9b64
FB
834 return 0;
835}
836
837static int asf_read_close(AVFormatContext *s)
838{
de6d9b64
FB
839 int i;
840
841 for(i=0;i<s->nb_streams;i++) {
bb270c08
DB
842 AVStream *st = s->streams[i];
843 av_free(st->priv_data);
1ae7518d 844 av_free(st->codec->palctrl);
de6d9b64 845 }
de6d9b64
FB
846 return 0;
847}
848
38376f00
KK
849// Added to support seeking after packets have been read
850// If information is not reset, read_packet fails due to
851// leftover information from previous reads
852static void asf_reset_header(AVFormatContext *s)
853{
854 ASFContext *asf = s->priv_data;
82b9e4a2
MN
855 ASFStream *asf_st;
856 int i;
38376f00
KK
857
858 asf->packet_nb_frames = 0;
38376f00
KK
859 asf->packet_size_left = 0;
860 asf->packet_segments = 0;
861 asf->packet_flags = 0;
862 asf->packet_property = 0;
863 asf->packet_timestamp = 0;
864 asf->packet_segsizetype = 0;
865 asf->packet_segments = 0;
866 asf->packet_seq = 0;
867 asf->packet_replic_size = 0;
868 asf->packet_key_frame = 0;
869 asf->packet_padsize = 0;
870 asf->packet_frag_offset = 0;
871 asf->packet_frag_size = 0;
872 asf->packet_frag_timestamp = 0;
873 asf->packet_multi_size = 0;
874 asf->packet_obj_size = 0;
875 asf->packet_time_delta = 0;
876 asf->packet_time_start = 0;
115329f1 877
82b9e4a2
MN
878 for(i=0; i<s->nb_streams; i++){
879 asf_st= s->streams[i]->priv_data;
880 av_free_packet(&asf_st->pkt);
881 asf_st->frag_offset=0;
882 asf_st->seq=0;
883 }
884 asf->asf_st= NULL;
38376f00
KK
885}
886
8d14a25c 887static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00
KK
888{
889 ASFContext *asf = s->priv_data;
890 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 891 ASFStream *asf_st;
580fb5e7 892 int64_t pts;
82b9e4a2 893 int64_t pos= *ppos;
3e9245a9
MN
894 int i;
895 int64_t start_pos[s->nb_streams];
115329f1 896
3e9245a9
MN
897 for(i=0; i<s->nb_streams; i++){
898 start_pos[i]= pos;
899 }
115329f1 900
8d14a25c
MN
901 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
902 *ppos= pos;
903 url_fseek(&s->pb, pos, SEEK_SET);
115329f1 904
82b9e4a2 905//printf("asf_read_pts\n");
82b9e4a2 906 asf_reset_header(s);
3e9245a9 907 for(;;){
82b9e4a2 908 if (av_read_frame(s, pkt) < 0){
0b93103a 909 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 910 return AV_NOPTS_VALUE;
82b9e4a2 911 }
115329f1 912
38cf2a72 913 pts= pkt->pts;
580fb5e7
MN
914
915 av_free_packet(pkt);
3e9245a9
MN
916 if(pkt->flags&PKT_FLAG_KEY){
917 i= pkt->stream_index;
918
919 asf_st= s->streams[i]->priv_data;
920
0fd9e6f3 921// assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 922 pos= asf_st->packet_pos;
09646bab 923
52e54612 924 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 925 start_pos[i]= asf_st->packet_pos + 1;
115329f1 926
3e9245a9
MN
927 if(pkt->stream_index == stream_index)
928 break;
929 }
930 }
931
932 *ppos= pos;
949b1a13 933//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
580fb5e7
MN
934
935 return pts;
38376f00
KK
936}
937
56c96a22
MN
938static void asf_build_simple_index(AVFormatContext *s, int stream_index)
939{
940 GUID g;
941 ASFContext *asf = s->priv_data;
942 int64_t gsize, itime;
943 int64_t pos, current_pos, index_pts;
944 int i;
945 int pct,ict;
946
947 current_pos = url_ftell(&s->pb);
948
949 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
950 get_guid(&s->pb, &g);
951 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
952 gsize = get_le64(&s->pb);
953 get_guid(&s->pb, &g);
954 itime=get_le64(&s->pb);
955 pct=get_le32(&s->pb);
956 ict=get_le32(&s->pb);
ccd3228e 957 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
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958
959 for (i=0;i<ict;i++){
960 int pktnum=get_le32(&s->pb);
961 int pktct =get_le16(&s->pb);
962 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
963
964 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
965 index_pts=av_rescale(itime, i, 10000);
966
967 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
968 }
52e54612 969 asf->index_read= 1;
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970 }
971 url_fseek(&s->pb, current_pos, SEEK_SET);
972}
973
3ba1438d 974static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 975{
afda223c 976 ASFContext *asf = s->priv_data;
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977 AVStream *st = s->streams[stream_index];
978 int64_t pos;
979 int index;
115329f1 980
a602556e 981 if (asf->packet_size <= 0)
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982 return -1;
983
52e54612 984 if (!asf->index_read)
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985 asf_build_simple_index(s, stream_index);
986
52e54612 987 if(!(asf->index_read && st->index_entries)){
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988 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
989 return -1;
990 }else{
991 index= av_index_search_timestamp(st, pts, flags);
992 if(index<0)
993 return -1;
994
995 /* find the position */
996 pos = st->index_entries[index].pos;
997 pts = st->index_entries[index].timestamp;
998
999 // various attempts to find key frame have failed so far
1000 // asf_reset_header(s);
1001 // url_fseek(&s->pb, pos, SEEK_SET);
1002 // key_pos = pos;
1003 // for(i=0;i<16;i++){
1004 // pos = url_ftell(&s->pb);
1005 // if (av_read_frame(s, &pkt) < 0){
1006 // av_log(s, AV_LOG_INFO, "seek failed\n");
1007 // return -1;
1008 // }
1009 // asf_st = s->streams[stream_index]->priv_data;
1010 // pos += st->parser->frame_offset;
1011 //
1012 // if (pkt.size > b) {
1013 // b = pkt.size;
1014 // key_pos = pos;
1015 // }
1016 //
1017 // av_free_packet(&pkt);
1018 // }
1019
1020 /* do the seek */
ccd3228e 1021 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
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1022 url_fseek(&s->pb, pos, SEEK_SET);
1023 }
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1024 asf_reset_header(s);
1025 return 0;
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1026}
1027
ff70e601 1028AVInputFormat asf_demuxer = {
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1029 "asf",
1030 "asf format",
1031 sizeof(ASFContext),
1032 asf_probe,
1033 asf_read_header,
1034 asf_read_packet,
1035 asf_read_close,
2a10020b 1036 asf_read_seek,
8d14a25c 1037 asf_read_pts,
c9a65ca8 1038};