Fix loop condition so it can be run through more than once.
[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
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119static int asf_probe(AVProbeData *pd)
120{
c9a65ca8 121 /* check file header */
24c14d6d 122 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
c9a65ca8
FB
123 return AVPROBE_SCORE_MAX;
124 else
125 return 0;
126}
127
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MN
128static int get_value(ByteIOContext *pb, int type){
129 switch(type){
130 case 2: return get_le32(pb);
131 case 3: return get_le32(pb);
132 case 4: return get_le64(pb);
133 case 5: return get_le16(pb);
134 default:return INT_MIN;
135 }
136}
137
de6d9b64
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138static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
139{
c9a65ca8 140 ASFContext *asf = s->priv_data;
de6d9b64
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141 GUID g;
142 ByteIOContext *pb = &s->pb;
143 AVStream *st;
144 ASFStream *asf_st;
e095026a 145 int size, i;
0c1a9eda 146 int64_t gsize;
30e88789
MN
147 AVRational dar[128];
148
149 memset(dar, 0, sizeof(dar));
de6d9b64 150
de6d9b64
FB
151 get_guid(pb, &g);
152 if (memcmp(&g, &asf_header, sizeof(GUID)))
153 goto fail;
154 get_le64(pb);
155 get_le32(pb);
156 get_byte(pb);
157 get_byte(pb);
2141dc37 158 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
de6d9b64
FB
159 for(;;) {
160 get_guid(pb, &g);
161 gsize = get_le64(pb);
162#ifdef DEBUG
949b1a13 163 printf("%08"PRIx64": ", url_ftell(pb) - 24);
de6d9b64 164 print_guid(&g);
949b1a13 165 printf(" size=0x%"PRIx64"\n", gsize);
de6d9b64 166#endif
09d9672a
MN
167 if (!memcmp(&g, &data_header, sizeof(GUID))) {
168 asf->data_object_offset = url_ftell(pb);
169 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
170 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
171 asf->data_object_size = gsize - 24;
172 } else {
173 asf->data_object_size = (uint64_t)-1;
174 }
175 break;
176 }
de6d9b64
FB
177 if (gsize < 24)
178 goto fail;
179 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b 180 get_guid(pb, &asf->hdr.guid);
bb270c08
DB
181 asf->hdr.file_size = get_le64(pb);
182 asf->hdr.create_time = get_le64(pb);
6bb2a2df 183 asf->nb_packets = get_le64(pb);
bb270c08
DB
184 asf->hdr.send_time = get_le64(pb);
185 asf->hdr.play_time = get_le64(pb);
186 asf->hdr.preroll = get_le32(pb);
187 asf->hdr.ignore = get_le32(pb);
188 asf->hdr.flags = get_le32(pb);
189 asf->hdr.min_pktsize = get_le32(pb);
190 asf->hdr.max_pktsize = get_le32(pb);
191 asf->hdr.max_bitrate = get_le32(pb);
192 asf->packet_size = asf->hdr.max_pktsize;
de6d9b64 193 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
7ad5455c
MN
194 int type, type_specific_size, sizeX;
195 uint64_t total_size;
de6d9b64 196 unsigned int tag1;
0c1a9eda 197 int64_t pos1, pos2;
6fea687e 198 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
2a10020b 199
de6d9b64
FB
200 pos1 = url_ftell(pb);
201
247eadca 202 st = av_new_stream(s, 0);
de6d9b64
FB
203 if (!st)
204 goto fail;
9ee91c2f 205 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
de6d9b64
FB
206 asf_st = av_mallocz(sizeof(ASFStream));
207 if (!asf_st)
208 goto fail;
209 st->priv_data = asf_st;
c0df9d75 210 st->start_time = asf->hdr.preroll;
73fe1052
RM
211 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
212 st->duration = asf->hdr.send_time /
213 (10000000 / 1000) - st->start_time;
214 }
de6d9b64 215 get_guid(pb, &g);
88141c91
MN
216
217 test_for_ext_stream_audio = 0;
de6d9b64
FB
218 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
219 type = CODEC_TYPE_AUDIO;
220 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
221 type = CODEC_TYPE_VIDEO;
ae38261e
MB
222 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
223 type = CODEC_TYPE_UNKNOWN;
88141c91
MN
224 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
225 test_for_ext_stream_audio = 1;
226 type = CODEC_TYPE_UNKNOWN;
de6d9b64
FB
227 } else {
228 goto fail;
229 }
230 get_guid(pb, &g);
231 total_size = get_le64(pb);
2e7973bb 232 type_specific_size = get_le32(pb);
de6d9b64 233 get_le32(pb);
bb270c08 234 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 235 // mapping of asf ID to AV stream ID;
247eadca 236 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 237
de6d9b64 238 get_le32(pb);
88141c91
MN
239
240 if (test_for_ext_stream_audio) {
241 get_guid(pb, &g);
242 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
243 type = CODEC_TYPE_AUDIO;
6fea687e 244 is_dvr_ms_audio=1;
88141c91
MN
245 get_guid(pb, &g);
246 get_le32(pb);
247 get_le32(pb);
248 get_le32(pb);
249 get_guid(pb, &g);
250 get_le32(pb);
251 }
252 }
253
bb270c08 254 st->codec->codec_type = type;
de6d9b64 255 if (type == CODEC_TYPE_AUDIO) {
01f4895c 256 get_wav_header(pb, st->codec, type_specific_size);
6fea687e
JD
257 if (is_dvr_ms_audio) {
258 // codec_id and codec_tag are unreliable in dvr_ms
259 // files. Set them later by probing stream.
260 st->codec->codec_id = CODEC_ID_NONE;
261 st->codec->codec_tag = 0;
262 }
57004ff1 263 st->need_parsing = AVSTREAM_PARSE_FULL;
bb270c08
DB
264 /* We have to init the frame size at some point .... */
265 pos2 = url_ftell(pb);
b9c6d01b 266 if (gsize >= (pos2 + 8 - pos1 + 24)) {
bb270c08
DB
267 asf_st->ds_span = get_byte(pb);
268 asf_st->ds_packet_size = get_le16(pb);
269 asf_st->ds_chunk_size = get_le16(pb);
6bb2a2df
MN
270 get_le16(pb); //ds_data_size
271 get_byte(pb); //ds_silence_data
bb270c08
DB
272 }
273 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
274 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
275 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
276 if (asf_st->ds_span > 1) {
277 if (!asf_st->ds_chunk_size
05219463
MN
278 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
279 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
bb270c08
DB
280 asf_st->ds_span = 0; // disable descrambling
281 }
01f4895c 282 switch (st->codec->codec_id) {
80783dc2 283 case CODEC_ID_MP3:
01f4895c 284 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
285 break;
286 case CODEC_ID_PCM_S16LE:
287 case CODEC_ID_PCM_S16BE:
288 case CODEC_ID_PCM_U16LE:
289 case CODEC_ID_PCM_U16BE:
290 case CODEC_ID_PCM_S8:
291 case CODEC_ID_PCM_U8:
292 case CODEC_ID_PCM_ALAW:
293 case CODEC_ID_PCM_MULAW:
01f4895c 294 st->codec->frame_size = 1;
f80c1ac0
PG
295 break;
296 default:
297 /* This is probably wrong, but it prevents a crash later */
01f4895c 298 st->codec->frame_size = 1;
f80c1ac0
PG
299 break;
300 }
88141c91 301 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 302 get_le32(pb);
de6d9b64
FB
303 get_le32(pb);
304 get_byte(pb);
305 size = get_le16(pb); /* size */
0ffd77b9 306 sizeX= get_le32(pb); /* size */
01f4895c 307 st->codec->width = get_le32(pb);
bb270c08 308 st->codec->height = get_le32(pb);
2a10020b 309 /* not available for asf */
de6d9b64 310 get_le16(pb); /* panes */
bb270c08 311 st->codec->bits_per_sample = get_le16(pb); /* depth */
de6d9b64 312 tag1 = get_le32(pb);
bb270c08 313 url_fskip(pb, 20);
0ffd77b9
MN
314// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
315 size= sizeX;
bb270c08
DB
316 if (size > 40) {
317 st->codec->extradata_size = size - 40;
318 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
319 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
320 }
5e29abf8
RT
321
322 /* Extract palette from extradata if bpp <= 8 */
323 /* This code assumes that extradata contains only palette */
324 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
325 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
326 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 327#ifdef WORDS_BIGENDIAN
01f4895c
MN
328 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
329 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 330#else
01f4895c
MN
331 memcpy(st->codec->palctrl->palette, st->codec->extradata,
332 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 333#endif
01f4895c 334 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
335 }
336
01f4895c 337 st->codec->codec_tag = tag1;
bb270c08 338 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4 339 if(tag1 == MKTAG('D', 'V', 'R', ' '))
57004ff1 340 st->need_parsing = AVSTREAM_PARSE_FULL;
de6d9b64
FB
341 }
342 pos2 = url_ftell(pb);
343 url_fskip(pb, gsize - (pos2 - pos1 + 24));
de6d9b64
FB
344 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
345 int len1, len2, len3, len4, len5;
346
347 len1 = get_le16(pb);
348 len2 = get_le16(pb);
349 len3 = get_le16(pb);
350 len4 = get_le16(pb);
351 len5 = get_le16(pb);
4e15cc8b
MN
352 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
353 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
de6d9b64 354 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
4e15cc8b 355 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
bb270c08 356 url_fskip(pb, len5);
0e3b6a6f
RM
357 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
358 int stream_count = get_le16(pb);
359 int j;
360
361// av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
362// av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
363 for(j = 0; j < stream_count; j++) {
364 int flags, bitrate, stream_id;
365
366 flags= get_le16(pb);
367 bitrate= get_le32(pb);
368 stream_id= (flags & 0x7f);
369// av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
370 asf->stream_bitrates[stream_id-1]= bitrate;
371 }
d13431cd
KK
372 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
373 int desc_count, i;
374
375 desc_count = get_le16(pb);
376 for(i=0;i<desc_count;i++)
377 {
052aa2ad
SH
378 int name_len,value_type,value_len;
379 uint64_t value_num = 0;
d045b8c1 380 char name[1024];
d13431cd
KK
381
382 name_len = get_le16(pb);
d045b8c1 383 get_str16_nolen(pb, name_len, name, sizeof(name));
d13431cd
KK
384 value_type = get_le16(pb);
385 value_len = get_le16(pb);
386 if ((value_type == 0) || (value_type == 1)) // unicode or byte
387 {
5e2a4855
MN
388 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
389 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
390 else url_fskip(pb, value_len);
d13431cd 391 }
724dc20c 392 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
d13431cd 393 {
30e88789 394 value_num= get_value(pb, value_type);
4e15cc8b
MN
395 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
396 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
d13431cd 397 }
d13431cd 398 }
30e88789
MN
399 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
400 int n, stream_num, name_len, value_len, value_type, value_num;
401 n = get_le16(pb);
402
403 for(i=0;i<n;i++) {
404 char name[1024];
405
406 get_le16(pb); //lang_list_index
407 stream_num= get_le16(pb);
408 name_len= get_le16(pb);
409 value_type= get_le16(pb);
410 value_len= get_le32(pb);
411
412 get_str16_nolen(pb, name_len, name, sizeof(name));
413//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
414 value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
415 url_fskip(pb, value_len - 2);
416
417 if(stream_num<128){
418 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
419 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
420 }
421 }
88141c91
MN
422 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
423 int ext_len, payload_ext_ct, stream_ct;
0b339acb 424 uint32_t ext_d;
1bd86246 425 int64_t pos_ex_st;
88141c91
MN
426 pos_ex_st = url_ftell(pb);
427
de3ae959
MN
428 get_le64(pb); // starttime
429 get_le64(pb); // endtime
0b339acb 430 get_le32(pb); // leak-datarate
de3ae959
MN
431 get_le32(pb); // bucket-datasize
432 get_le32(pb); // init-bucket-fullness
433 get_le32(pb); // alt-leak-datarate
434 get_le32(pb); // alt-bucket-datasize
435 get_le32(pb); // alt-init-bucket-fullness
436 get_le32(pb); // max-object-size
437 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
0b339acb 438 get_le16(pb); // stream-num
de3ae959
MN
439 get_le16(pb); // stream-language-id-index
440 get_le64(pb); // avg frametime in 100ns units
441 stream_ct = get_le16(pb); //stream-name-count
442 payload_ext_ct = get_le16(pb); //payload-extension-system-count
88141c91
MN
443
444 for (i=0; i<stream_ct; i++){
445 get_le16(pb);
446 ext_len = get_le16(pb);
447 url_fseek(pb, ext_len, SEEK_CUR);
448 }
449
450 for (i=0; i<payload_ext_ct; i++){
451 get_guid(pb, &g);
452 ext_d=get_le16(pb);
453 ext_len=get_le32(pb);
454 url_fseek(pb, ext_len, SEEK_CUR);
455 }
456
457 // there could be a optional stream properties object to follow
458 // if so the next iteration will pick it up
de6d9b64
FB
459 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
460 int v1, v2;
461 get_guid(pb, &g);
462 v1 = get_le32(pb);
463 v2 = get_le16(pb);
88141c91 464#if 0
de6d9b64
FB
465 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
466 int len, v1, n, num;
467 char str[256], *q;
468 char tag[16];
469
470 get_guid(pb, &g);
471 print_guid(&g);
2a10020b 472
de6d9b64
FB
473 n = get_le32(pb);
474 for(i=0;i<n;i++) {
475 num = get_le16(pb); /* stream number */
476 get_str16(pb, str, sizeof(str));
477 get_str16(pb, str, sizeof(str));
478 len = get_le16(pb);
479 q = tag;
480 while (len > 0) {
481 v1 = get_byte(pb);
482 if ((q - tag) < sizeof(tag) - 1)
483 *q++ = v1;
484 len--;
485 }
486 *q = '\0';
487 }
488#endif
489 } else if (url_feof(pb)) {
490 goto fail;
491 } else {
492 url_fseek(pb, gsize - 24, SEEK_CUR);
493 }
494 }
495 get_guid(pb, &g);
496 get_le64(pb);
497 get_byte(pb);
498 get_byte(pb);
2141dc37
ZK
499 if (url_feof(pb))
500 goto fail;
501 asf->data_offset = url_ftell(pb);
de6d9b64
FB
502 asf->packet_size_left = 0;
503
30e88789
MN
504
505 for(i=0; i<128; i++){
506 int stream_num= asf->asfid2avid[i];
0b339acb 507 if(stream_num>=0 && dar[i].num>0 && dar[i].den>0){
30e88789 508 AVCodecContext *codec= s->streams[stream_num]->codec;
0b339acb
BC
509 av_reduce(&codec->sample_aspect_ratio.num,
510 &codec->sample_aspect_ratio.den,
511 dar[i].num, dar[i].den, INT_MAX);
30e88789
MN
512//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);
513 }
514 }
515
de6d9b64
FB
516 return 0;
517
518 fail:
4c3dff6d 519 for(i=0;i<s->nb_streams;i++) {
de6d9b64 520 AVStream *st = s->streams[i];
bb270c08
DB
521 if (st) {
522 av_free(st->priv_data);
01f4895c 523 av_free(st->codec->extradata);
bb270c08 524 }
1ea4f593 525 av_free(st);
de6d9b64 526 }
de6d9b64
FB
527 return -1;
528}
529
2a10020b
ZK
530#define DO_2BITS(bits, var, defval) \
531 switch (bits & 3) \
532 { \
533 case 3: var = get_le32(pb); rsize += 4; break; \
534 case 2: var = get_le16(pb); rsize += 2; break; \
535 case 1: var = get_byte(pb); rsize++; break; \
536 default: var = defval; break; \
537 }
538
f7835507
MN
539/**
540 *
541 * @return <0 in case of an error
542 */
de6d9b64
FB
543static int asf_get_packet(AVFormatContext *s)
544{
545 ASFContext *asf = s->priv_data;
546 ByteIOContext *pb = &s->pb;
2a10020b 547 uint32_t packet_length, padsize;
0c0d17f3 548 int rsize = 8;
0fd9e6f3
MN
549 int c, d, e, off;
550
551 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
552
553 c=d=e=-1;
554 while(off-- > 0){
555 c=d; d=e;
556 e= get_byte(pb);
557 if(c == 0x82 && !d && !e)
558 break;
559 }
115329f1 560
1359c2d4 561 if (c != 0x82) {
5acdd6e6 562 if (!url_feof(pb))
bb270c08 563 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b 564 }
0c0d17f3 565 if ((c & 0x8f) == 0x82) {
0fd9e6f3 566 if (d || e) {
5acdd6e6 567 if (!url_feof(pb))
bb270c08 568 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 569 return -1;
bb270c08 570 }
0c0d17f3 571 c= get_byte(pb);
0fd9e6f3 572 d= get_byte(pb);
0c0d17f3
MN
573 rsize+=3;
574 }else{
575 url_fseek(pb, -1, SEEK_CUR); //FIXME
de6d9b64 576 }
2a10020b 577
0c0d17f3
MN
578 asf->packet_flags = c;
579 asf->packet_property = d;
2a10020b
ZK
580
581 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
582 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
583 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
584
5b11e081
MN
585 //the following checks prevent overflows and infinite loops
586 if(packet_length >= (1U<<29)){
587 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 588 return -1;
5b11e081 589 }
92216453 590 if(padsize >= packet_length){
5b11e081 591 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 592 return -1;
5b11e081
MN
593 }
594
2a10020b 595 asf->packet_timestamp = get_le32(pb);
de6d9b64 596 get_le16(pb); /* duration */
2141dc37 597 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
598
599 if (asf->packet_flags & 0x01) {
bb270c08 600 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
601 asf->packet_segments = asf->packet_segsizetype & 0x3f;
602 } else {
bb270c08 603 asf->packet_segments = 1;
2a10020b
ZK
604 asf->packet_segsizetype = 0x80;
605 }
606 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
607 if (packet_length < asf->hdr.min_pktsize)
608 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 609 asf->packet_padsize = padsize;
de6d9b64 610#ifdef DEBUG
2a10020b 611 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 612#endif
de6d9b64
FB
613 return 0;
614}
615
ae60a857
MN
616/**
617 *
618 * @return <0 if error
619 */
620static int asf_read_frame_header(AVFormatContext *s){
621 ASFContext *asf = s->priv_data;
622 ByteIOContext *pb = &s->pb;
623 int rsize = 1;
624 int num = get_byte(pb);
559a55ad 625 int64_t ts0, ts1;
ae60a857
MN
626
627 asf->packet_segments--;
628 asf->packet_key_frame = num >> 7;
629 asf->stream_index = asf->asfid2avid[num & 0x7f];
630 // sequence should be ignored!
631 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
632 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
633 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
634//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);
635 if (asf->packet_replic_size >= 8) {
636 asf->packet_obj_size = get_le32(pb);
637 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
638 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
639 return -1;
640 }
641 asf->packet_frag_timestamp = get_le32(pb); // timestamp
559a55ad
MN
642 if(asf->packet_replic_size >= 8+38+4){
643// for(i=0; i<asf->packet_replic_size-8; i++)
644// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
645// av_log(s, AV_LOG_DEBUG, "\n");
646 url_fskip(pb, 10);
647 ts0= get_le64(pb);
648 ts1= get_le64(pb);
649 url_fskip(pb, 12);
650 get_le32(pb);
651 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
652 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
653 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
654 }else
655 url_fskip(pb, asf->packet_replic_size - 8);
ae60a857
MN
656 rsize += asf->packet_replic_size; // FIXME - check validity
657 } else if (asf->packet_replic_size==1){
658 // multipacket - frag_offset is begining timestamp
659 asf->packet_time_start = asf->packet_frag_offset;
660 asf->packet_frag_offset = 0;
661 asf->packet_frag_timestamp = asf->packet_timestamp;
662
663 asf->packet_time_delta = get_byte(pb);
664 rsize++;
665 }else if(asf->packet_replic_size!=0){
666 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
667 return -1;
668 }
669 if (asf->packet_flags & 0x01) {
670 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
671 if(asf->packet_frag_size > asf->packet_size_left - rsize){
672 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
673 return -1;
674 }
ae60a857
MN
675 //printf("Fragsize %d\n", asf->packet_frag_size);
676 } else {
677 asf->packet_frag_size = asf->packet_size_left - rsize;
678 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
679 }
680 if (asf->packet_replic_size == 1) {
681 asf->packet_multi_size = asf->packet_frag_size;
682 if (asf->packet_multi_size > asf->packet_size_left)
683 return -1;
684 }
685 asf->packet_size_left -= rsize;
686 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
687
688 return 0;
689}
690
de6d9b64
FB
691static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
692{
693 ASFContext *asf = s->priv_data;
2a10020b 694 ASFStream *asf_st = 0;
de6d9b64 695 ByteIOContext *pb = &s->pb;
1359c2d4 696 //static int pc = 0;
2a10020b 697 for (;;) {
ceba96cb
MN
698 if(url_feof(pb))
699 return AVERROR_IO;
bb270c08
DB
700 if (asf->packet_size_left < FRAME_HEADER_SIZE
701 || asf->packet_segments < 1) {
702 //asf->packet_size_left <= asf->packet_padsize) {
703 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 704 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 705 assert(ret>=0);
bb270c08
DB
706 /* fail safe */
707 url_fskip(pb, ret);
b04d5d31 708
82b9e4a2 709 asf->packet_pos= url_ftell(&s->pb);
b6eaae39
KED
710 if (asf->data_object_size != (uint64_t)-1 &&
711 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
712 return AVERROR_IO; /* Do not exceed the size of the data object */
bb270c08
DB
713 ret = asf_get_packet(s);
714 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
ceba96cb
MN
715 if (ret < 0)
716 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
2141dc37 717 asf->packet_time_start = 0;
2a10020b 718 continue;
bb270c08
DB
719 }
720 if (asf->packet_time_start == 0) {
ae60a857
MN
721 if(asf_read_frame_header(s) < 0){
722 asf->packet_segments= 0;
236116cb 723 continue;
1305a9d5 724 }
bb270c08 725 if (asf->stream_index < 0
f3356e9c
MN
726 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
727 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
728 ) {
1359c2d4 729 asf->packet_time_start = 0;
bb270c08
DB
730 /* unhandled packet (should not happen) */
731 url_fskip(pb, asf->packet_frag_size);
732 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 733 if(asf->stream_index < 0)
ae60a857 734 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 735 continue;
bb270c08
DB
736 }
737 asf->asf_st = s->streams[asf->stream_index]->priv_data;
738 }
739 asf_st = asf->asf_st;
740
bb270c08
DB
741 if (asf->packet_replic_size == 1) {
742 // frag_offset is here used as the begining timestamp
743 asf->packet_frag_timestamp = asf->packet_time_start;
744 asf->packet_time_start += asf->packet_time_delta;
745 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
746 asf->packet_size_left--;
2141dc37 747 asf->packet_multi_size--;
bb270c08
DB
748 if (asf->packet_multi_size < asf->packet_obj_size)
749 {
750 asf->packet_time_start = 0;
751 url_fskip(pb, asf->packet_multi_size);
752 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 753 continue;
bb270c08
DB
754 }
755 asf->packet_multi_size -= asf->packet_obj_size;
756 //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);
757 }
f8f0a0bd
MN
758 if ( asf_st->pkt.size != asf->packet_obj_size
759 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
200026aa
MN
760 if(asf_st->pkt.data){
761 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
762 asf_st->frag_offset = 0;
763 av_free_packet(&asf_st->pkt);
764 }
bb270c08
DB
765 /* new packet */
766 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
767 asf_st->seq = asf->packet_seq;
768 asf_st->pkt.pts = asf->packet_frag_timestamp;
769 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
770 asf_st->pkt.pos =
771 asf_st->packet_pos= asf->packet_pos;
772//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 773//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 774//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
775 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
776 asf->packet_key_frame = 1;
777 if (asf->packet_key_frame)
778 asf_st->pkt.flags |= PKT_FLAG_KEY;
779 }
780
781 /* read data */
782 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
783 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
784 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
785 asf->packet_size_left -= asf->packet_frag_size;
786 if (asf->packet_size_left < 0)
2141dc37 787 continue;
4c71d727
MN
788
789 if( asf->packet_frag_offset >= asf_st->pkt.size
790 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
791 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
792 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
793 continue;
794 }
795
bb270c08
DB
796 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
797 asf->packet_frag_size);
798 asf_st->frag_offset += asf->packet_frag_size;
799 /* test if whole packet is read */
800 if (asf_st->frag_offset == asf_st->pkt.size) {
801 /* return packet */
802 if (asf_st->ds_span > 1) {
05219463
MN
803 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
804 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
805 }else{
bb270c08 806 /* packet descrambling */
191e8ca7 807 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
808 if (newdata) {
809 int offset = 0;
810 while (offset < asf_st->pkt.size) {
811 int off = offset / asf_st->ds_chunk_size;
812 int row = off / asf_st->ds_span;
813 int col = off % asf_st->ds_span;
814 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
815 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
816
817 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
818 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
819 memcpy(newdata + offset,
820 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
821 asf_st->ds_chunk_size);
822 offset += asf_st->ds_chunk_size;
823 }
824 av_free(asf_st->pkt.data);
825 asf_st->pkt.data = newdata;
826 }
05219463 827 }
bb270c08
DB
828 }
829 asf_st->frag_offset = 0;
b83e83b9 830 *pkt= asf_st->pkt;
bb270c08
DB
831 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
832 asf_st->pkt.size = 0;
833 asf_st->pkt.data = 0;
834 break; // packet completed
835 }
de6d9b64 836 }
de6d9b64
FB
837 return 0;
838}
839
840static int asf_read_close(AVFormatContext *s)
841{
de6d9b64
FB
842 int i;
843
844 for(i=0;i<s->nb_streams;i++) {
bb270c08
DB
845 AVStream *st = s->streams[i];
846 av_free(st->priv_data);
1ae7518d 847 av_free(st->codec->palctrl);
de6d9b64 848 }
de6d9b64
FB
849 return 0;
850}
851
38376f00
KK
852// Added to support seeking after packets have been read
853// If information is not reset, read_packet fails due to
854// leftover information from previous reads
855static void asf_reset_header(AVFormatContext *s)
856{
857 ASFContext *asf = s->priv_data;
82b9e4a2
MN
858 ASFStream *asf_st;
859 int i;
38376f00
KK
860
861 asf->packet_nb_frames = 0;
38376f00
KK
862 asf->packet_size_left = 0;
863 asf->packet_segments = 0;
864 asf->packet_flags = 0;
865 asf->packet_property = 0;
866 asf->packet_timestamp = 0;
867 asf->packet_segsizetype = 0;
868 asf->packet_segments = 0;
869 asf->packet_seq = 0;
870 asf->packet_replic_size = 0;
871 asf->packet_key_frame = 0;
872 asf->packet_padsize = 0;
873 asf->packet_frag_offset = 0;
874 asf->packet_frag_size = 0;
875 asf->packet_frag_timestamp = 0;
876 asf->packet_multi_size = 0;
877 asf->packet_obj_size = 0;
878 asf->packet_time_delta = 0;
879 asf->packet_time_start = 0;
115329f1 880
82b9e4a2
MN
881 for(i=0; i<s->nb_streams; i++){
882 asf_st= s->streams[i]->priv_data;
883 av_free_packet(&asf_st->pkt);
884 asf_st->frag_offset=0;
885 asf_st->seq=0;
886 }
887 asf->asf_st= NULL;
38376f00
KK
888}
889
8d14a25c 890static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00
KK
891{
892 ASFContext *asf = s->priv_data;
893 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 894 ASFStream *asf_st;
580fb5e7 895 int64_t pts;
82b9e4a2 896 int64_t pos= *ppos;
3e9245a9
MN
897 int i;
898 int64_t start_pos[s->nb_streams];
115329f1 899
3e9245a9
MN
900 for(i=0; i<s->nb_streams; i++){
901 start_pos[i]= pos;
902 }
115329f1 903
8d14a25c
MN
904 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
905 *ppos= pos;
906 url_fseek(&s->pb, pos, SEEK_SET);
115329f1 907
82b9e4a2 908//printf("asf_read_pts\n");
82b9e4a2 909 asf_reset_header(s);
3e9245a9 910 for(;;){
82b9e4a2 911 if (av_read_frame(s, pkt) < 0){
0b93103a 912 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 913 return AV_NOPTS_VALUE;
82b9e4a2 914 }
115329f1 915
38cf2a72 916 pts= pkt->pts;
580fb5e7
MN
917
918 av_free_packet(pkt);
3e9245a9
MN
919 if(pkt->flags&PKT_FLAG_KEY){
920 i= pkt->stream_index;
921
922 asf_st= s->streams[i]->priv_data;
923
0fd9e6f3 924// assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 925 pos= asf_st->packet_pos;
09646bab 926
52e54612 927 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 928 start_pos[i]= asf_st->packet_pos + 1;
115329f1 929
3e9245a9
MN
930 if(pkt->stream_index == stream_index)
931 break;
932 }
933 }
934
935 *ppos= pos;
949b1a13 936//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
580fb5e7
MN
937
938 return pts;
38376f00
KK
939}
940
56c96a22
MN
941static void asf_build_simple_index(AVFormatContext *s, int stream_index)
942{
943 GUID g;
944 ASFContext *asf = s->priv_data;
945 int64_t gsize, itime;
946 int64_t pos, current_pos, index_pts;
947 int i;
948 int pct,ict;
949
950 current_pos = url_ftell(&s->pb);
951
952 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
953 get_guid(&s->pb, &g);
954 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
955 gsize = get_le64(&s->pb);
956 get_guid(&s->pb, &g);
957 itime=get_le64(&s->pb);
958 pct=get_le32(&s->pb);
959 ict=get_le32(&s->pb);
ccd3228e 960 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
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961
962 for (i=0;i<ict;i++){
963 int pktnum=get_le32(&s->pb);
964 int pktct =get_le16(&s->pb);
965 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
966
967 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
968 index_pts=av_rescale(itime, i, 10000);
969
970 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
971 }
52e54612 972 asf->index_read= 1;
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973 }
974 url_fseek(&s->pb, current_pos, SEEK_SET);
975}
976
3ba1438d 977static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 978{
afda223c 979 ASFContext *asf = s->priv_data;
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980 AVStream *st = s->streams[stream_index];
981 int64_t pos;
982 int index;
115329f1 983
a602556e 984 if (asf->packet_size <= 0)
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985 return -1;
986
52e54612 987 if (!asf->index_read)
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988 asf_build_simple_index(s, stream_index);
989
52e54612 990 if(!(asf->index_read && st->index_entries)){
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991 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
992 return -1;
993 }else{
994 index= av_index_search_timestamp(st, pts, flags);
995 if(index<0)
996 return -1;
997
998 /* find the position */
999 pos = st->index_entries[index].pos;
1000 pts = st->index_entries[index].timestamp;
1001
1002 // various attempts to find key frame have failed so far
1003 // asf_reset_header(s);
1004 // url_fseek(&s->pb, pos, SEEK_SET);
1005 // key_pos = pos;
1006 // for(i=0;i<16;i++){
1007 // pos = url_ftell(&s->pb);
1008 // if (av_read_frame(s, &pkt) < 0){
1009 // av_log(s, AV_LOG_INFO, "seek failed\n");
1010 // return -1;
1011 // }
1012 // asf_st = s->streams[stream_index]->priv_data;
1013 // pos += st->parser->frame_offset;
1014 //
1015 // if (pkt.size > b) {
1016 // b = pkt.size;
1017 // key_pos = pos;
1018 // }
1019 //
1020 // av_free_packet(&pkt);
1021 // }
1022
1023 /* do the seek */
ccd3228e 1024 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
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1025 url_fseek(&s->pb, pos, SEEK_SET);
1026 }
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1027 asf_reset_header(s);
1028 return 0;
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1029}
1030
ff70e601 1031AVInputFormat asf_demuxer = {
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1032 "asf",
1033 "asf format",
1034 sizeof(ASFContext),
1035 asf_probe,
1036 asf_read_header,
1037 asf_read_packet,
1038 asf_read_close,
2a10020b 1039 asf_read_seek,
8d14a25c 1040 asf_read_pts,
c9a65ca8 1041};