Introduce an SDP generator
[libav.git] / libavformat / asf.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * ASF compatible demuxer
19720f15 3 * Copyright (c) 2000, 2001 Fabrice Bellard.
de6d9b64 4 *
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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
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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
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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
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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};
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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
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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) ");
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MN
77 for(i=0;i<16;i++)
78 printf(" 0x%02x,", (*g)[i]);
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79 printf("}\n");
80}
6df84c3a 81#undef PRINT_IF_GUID
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82#endif
83
84static void get_guid(ByteIOContext *s, GUID *g)
85{
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MN
86 assert(sizeof(*g) == 16);
87 get_buffer(s, g, sizeof(*g));
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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;)
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FB
115 }
116 *q = '\0';
117}
118
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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)))
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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
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138static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
139{
c9a65ca8 140 ASFContext *asf = s->priv_data;
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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 147 AVRational dar[128];
d8470737 148 uint32_t bitrate[128];
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MN
149
150 memset(dar, 0, sizeof(dar));
d8470737 151 memset(bitrate, 0, sizeof(bitrate));
de6d9b64 152
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FB
153 get_guid(pb, &g);
154 if (memcmp(&g, &asf_header, sizeof(GUID)))
155 goto fail;
156 get_le64(pb);
157 get_le32(pb);
158 get_byte(pb);
159 get_byte(pb);
2141dc37 160 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
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FB
161 for(;;) {
162 get_guid(pb, &g);
163 gsize = get_le64(pb);
164#ifdef DEBUG
949b1a13 165 printf("%08"PRIx64": ", url_ftell(pb) - 24);
de6d9b64 166 print_guid(&g);
949b1a13 167 printf(" size=0x%"PRIx64"\n", gsize);
de6d9b64 168#endif
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MN
169 if (!memcmp(&g, &data_header, sizeof(GUID))) {
170 asf->data_object_offset = url_ftell(pb);
171 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
172 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
173 asf->data_object_size = gsize - 24;
174 } else {
175 asf->data_object_size = (uint64_t)-1;
176 }
177 break;
178 }
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FB
179 if (gsize < 24)
180 goto fail;
181 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b 182 get_guid(pb, &asf->hdr.guid);
bb270c08
DB
183 asf->hdr.file_size = get_le64(pb);
184 asf->hdr.create_time = get_le64(pb);
6bb2a2df 185 asf->nb_packets = get_le64(pb);
bb270c08
DB
186 asf->hdr.send_time = get_le64(pb);
187 asf->hdr.play_time = get_le64(pb);
188 asf->hdr.preroll = get_le32(pb);
189 asf->hdr.ignore = get_le32(pb);
190 asf->hdr.flags = get_le32(pb);
191 asf->hdr.min_pktsize = get_le32(pb);
192 asf->hdr.max_pktsize = get_le32(pb);
193 asf->hdr.max_bitrate = get_le32(pb);
194 asf->packet_size = asf->hdr.max_pktsize;
de6d9b64 195 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
7ad5455c
MN
196 int type, type_specific_size, sizeX;
197 uint64_t total_size;
de6d9b64 198 unsigned int tag1;
0c1a9eda 199 int64_t pos1, pos2;
6fea687e 200 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
2a10020b 201
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FB
202 pos1 = url_ftell(pb);
203
247eadca 204 st = av_new_stream(s, 0);
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FB
205 if (!st)
206 goto fail;
9ee91c2f 207 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
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FB
208 asf_st = av_mallocz(sizeof(ASFStream));
209 if (!asf_st)
210 goto fail;
211 st->priv_data = asf_st;
c0df9d75 212 st->start_time = asf->hdr.preroll;
73fe1052
RM
213 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
214 st->duration = asf->hdr.send_time /
215 (10000000 / 1000) - st->start_time;
216 }
de6d9b64 217 get_guid(pb, &g);
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MN
218
219 test_for_ext_stream_audio = 0;
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FB
220 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
221 type = CODEC_TYPE_AUDIO;
222 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
223 type = CODEC_TYPE_VIDEO;
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MB
224 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
225 type = CODEC_TYPE_UNKNOWN;
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MN
226 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
227 test_for_ext_stream_audio = 1;
228 type = CODEC_TYPE_UNKNOWN;
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FB
229 } else {
230 goto fail;
231 }
232 get_guid(pb, &g);
233 total_size = get_le64(pb);
2e7973bb 234 type_specific_size = get_le32(pb);
de6d9b64 235 get_le32(pb);
bb270c08 236 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 237 // mapping of asf ID to AV stream ID;
247eadca 238 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 239
de6d9b64 240 get_le32(pb);
88141c91
MN
241
242 if (test_for_ext_stream_audio) {
243 get_guid(pb, &g);
244 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
245 type = CODEC_TYPE_AUDIO;
6fea687e 246 is_dvr_ms_audio=1;
88141c91
MN
247 get_guid(pb, &g);
248 get_le32(pb);
249 get_le32(pb);
250 get_le32(pb);
251 get_guid(pb, &g);
252 get_le32(pb);
253 }
254 }
255
bb270c08 256 st->codec->codec_type = type;
de6d9b64 257 if (type == CODEC_TYPE_AUDIO) {
01f4895c 258 get_wav_header(pb, st->codec, type_specific_size);
6fea687e
JD
259 if (is_dvr_ms_audio) {
260 // codec_id and codec_tag are unreliable in dvr_ms
261 // files. Set them later by probing stream.
262 st->codec->codec_id = CODEC_ID_NONE;
263 st->codec->codec_tag = 0;
264 }
57004ff1 265 st->need_parsing = AVSTREAM_PARSE_FULL;
bb270c08
DB
266 /* We have to init the frame size at some point .... */
267 pos2 = url_ftell(pb);
b9c6d01b 268 if (gsize >= (pos2 + 8 - pos1 + 24)) {
bb270c08
DB
269 asf_st->ds_span = get_byte(pb);
270 asf_st->ds_packet_size = get_le16(pb);
271 asf_st->ds_chunk_size = get_le16(pb);
6bb2a2df
MN
272 get_le16(pb); //ds_data_size
273 get_byte(pb); //ds_silence_data
bb270c08
DB
274 }
275 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
276 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
277 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
278 if (asf_st->ds_span > 1) {
279 if (!asf_st->ds_chunk_size
05219463
MN
280 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
281 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
bb270c08
DB
282 asf_st->ds_span = 0; // disable descrambling
283 }
01f4895c 284 switch (st->codec->codec_id) {
80783dc2 285 case CODEC_ID_MP3:
01f4895c 286 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
287 break;
288 case CODEC_ID_PCM_S16LE:
289 case CODEC_ID_PCM_S16BE:
290 case CODEC_ID_PCM_U16LE:
291 case CODEC_ID_PCM_U16BE:
292 case CODEC_ID_PCM_S8:
293 case CODEC_ID_PCM_U8:
294 case CODEC_ID_PCM_ALAW:
295 case CODEC_ID_PCM_MULAW:
01f4895c 296 st->codec->frame_size = 1;
f80c1ac0
PG
297 break;
298 default:
299 /* This is probably wrong, but it prevents a crash later */
01f4895c 300 st->codec->frame_size = 1;
f80c1ac0
PG
301 break;
302 }
88141c91 303 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 304 get_le32(pb);
de6d9b64
FB
305 get_le32(pb);
306 get_byte(pb);
307 size = get_le16(pb); /* size */
0ffd77b9 308 sizeX= get_le32(pb); /* size */
01f4895c 309 st->codec->width = get_le32(pb);
bb270c08 310 st->codec->height = get_le32(pb);
2a10020b 311 /* not available for asf */
de6d9b64 312 get_le16(pb); /* panes */
bb270c08 313 st->codec->bits_per_sample = get_le16(pb); /* depth */
de6d9b64 314 tag1 = get_le32(pb);
bb270c08 315 url_fskip(pb, 20);
0ffd77b9
MN
316// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
317 size= sizeX;
bb270c08
DB
318 if (size > 40) {
319 st->codec->extradata_size = size - 40;
320 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
321 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
322 }
5e29abf8
RT
323
324 /* Extract palette from extradata if bpp <= 8 */
325 /* This code assumes that extradata contains only palette */
326 /* This is true for all paletted codecs implemented in ffmpeg */
01f4895c
MN
327 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
328 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 329#ifdef WORDS_BIGENDIAN
01f4895c
MN
330 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
331 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 332#else
01f4895c
MN
333 memcpy(st->codec->palctrl->palette, st->codec->extradata,
334 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 335#endif
01f4895c 336 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
337 }
338
01f4895c 339 st->codec->codec_tag = tag1;
bb270c08 340 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4 341 if(tag1 == MKTAG('D', 'V', 'R', ' '))
57004ff1 342 st->need_parsing = AVSTREAM_PARSE_FULL;
de6d9b64
FB
343 }
344 pos2 = url_ftell(pb);
345 url_fskip(pb, gsize - (pos2 - pos1 + 24));
de6d9b64
FB
346 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
347 int len1, len2, len3, len4, len5;
348
349 len1 = get_le16(pb);
350 len2 = get_le16(pb);
351 len3 = get_le16(pb);
352 len4 = get_le16(pb);
353 len5 = get_le16(pb);
4e15cc8b
MN
354 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
355 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
de6d9b64 356 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
4e15cc8b 357 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
bb270c08 358 url_fskip(pb, len5);
0e3b6a6f
RM
359 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
360 int stream_count = get_le16(pb);
361 int j;
362
363// av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
364// av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
365 for(j = 0; j < stream_count; j++) {
366 int flags, bitrate, stream_id;
367
368 flags= get_le16(pb);
369 bitrate= get_le32(pb);
370 stream_id= (flags & 0x7f);
371// av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
372 asf->stream_bitrates[stream_id-1]= bitrate;
373 }
d13431cd
KK
374 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
375 int desc_count, i;
376
377 desc_count = get_le16(pb);
378 for(i=0;i<desc_count;i++)
379 {
052aa2ad
SH
380 int name_len,value_type,value_len;
381 uint64_t value_num = 0;
d045b8c1 382 char name[1024];
d13431cd
KK
383
384 name_len = get_le16(pb);
d045b8c1 385 get_str16_nolen(pb, name_len, name, sizeof(name));
d13431cd
KK
386 value_type = get_le16(pb);
387 value_len = get_le16(pb);
388 if ((value_type == 0) || (value_type == 1)) // unicode or byte
389 {
5e2a4855
MN
390 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
391 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
629272d8
PB
392 else if(!strcmp(name,"WM/Track")) {
393 char track[8];
394 get_str16_nolen(pb, value_len, track, sizeof(track));
395 s->track = strtol(track, NULL, 10) + 1;
396 }
397 else if(!strcmp(name,"WM/TrackNumber")) {
398 char track[8];
399 get_str16_nolen(pb, value_len, track, sizeof(track));
400 s->track = strtol(track, NULL, 10);
401 }
5e2a4855 402 else url_fskip(pb, value_len);
d13431cd 403 }
724dc20c 404 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
d13431cd 405 {
30e88789 406 value_num= get_value(pb, value_type);
4e15cc8b
MN
407 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
408 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
d13431cd 409 }
d13431cd 410 }
30e88789
MN
411 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
412 int n, stream_num, name_len, value_len, value_type, value_num;
413 n = get_le16(pb);
414
415 for(i=0;i<n;i++) {
416 char name[1024];
417
418 get_le16(pb); //lang_list_index
419 stream_num= get_le16(pb);
420 name_len= get_le16(pb);
421 value_type= get_le16(pb);
422 value_len= get_le32(pb);
423
424 get_str16_nolen(pb, name_len, name, sizeof(name));
425//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
755bfeab 426 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
30e88789
MN
427 url_fskip(pb, value_len - 2);
428
429 if(stream_num<128){
430 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
431 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
432 }
433 }
88141c91
MN
434 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
435 int ext_len, payload_ext_ct, stream_ct;
d8470737 436 uint32_t ext_d, leak_rate, stream_num;
1bd86246 437 int64_t pos_ex_st;
88141c91
MN
438 pos_ex_st = url_ftell(pb);
439
de3ae959
MN
440 get_le64(pb); // starttime
441 get_le64(pb); // endtime
d8470737 442 leak_rate = get_le32(pb); // leak-datarate
de3ae959
MN
443 get_le32(pb); // bucket-datasize
444 get_le32(pb); // init-bucket-fullness
445 get_le32(pb); // alt-leak-datarate
446 get_le32(pb); // alt-bucket-datasize
447 get_le32(pb); // alt-init-bucket-fullness
448 get_le32(pb); // max-object-size
449 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
d8470737 450 stream_num = get_le16(pb); // stream-num
de3ae959
MN
451 get_le16(pb); // stream-language-id-index
452 get_le64(pb); // avg frametime in 100ns units
453 stream_ct = get_le16(pb); //stream-name-count
454 payload_ext_ct = get_le16(pb); //payload-extension-system-count
88141c91 455
d8470737
ZM
456 if (stream_num < 128)
457 bitrate[stream_num] = leak_rate;
458
88141c91
MN
459 for (i=0; i<stream_ct; i++){
460 get_le16(pb);
461 ext_len = get_le16(pb);
462 url_fseek(pb, ext_len, SEEK_CUR);
463 }
464
465 for (i=0; i<payload_ext_ct; i++){
466 get_guid(pb, &g);
467 ext_d=get_le16(pb);
468 ext_len=get_le32(pb);
469 url_fseek(pb, ext_len, SEEK_CUR);
470 }
471
472 // there could be a optional stream properties object to follow
473 // if so the next iteration will pick it up
de6d9b64
FB
474 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
475 int v1, v2;
476 get_guid(pb, &g);
477 v1 = get_le32(pb);
478 v2 = get_le16(pb);
88141c91 479#if 0
de6d9b64
FB
480 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
481 int len, v1, n, num;
482 char str[256], *q;
483 char tag[16];
484
485 get_guid(pb, &g);
486 print_guid(&g);
2a10020b 487
de6d9b64
FB
488 n = get_le32(pb);
489 for(i=0;i<n;i++) {
490 num = get_le16(pb); /* stream number */
491 get_str16(pb, str, sizeof(str));
492 get_str16(pb, str, sizeof(str));
493 len = get_le16(pb);
494 q = tag;
495 while (len > 0) {
496 v1 = get_byte(pb);
497 if ((q - tag) < sizeof(tag) - 1)
498 *q++ = v1;
499 len--;
500 }
501 *q = '\0';
502 }
503#endif
504 } else if (url_feof(pb)) {
505 goto fail;
506 } else {
507 url_fseek(pb, gsize - 24, SEEK_CUR);
508 }
509 }
510 get_guid(pb, &g);
511 get_le64(pb);
512 get_byte(pb);
513 get_byte(pb);
2141dc37
ZK
514 if (url_feof(pb))
515 goto fail;
516 asf->data_offset = url_ftell(pb);
de6d9b64
FB
517 asf->packet_size_left = 0;
518
30e88789
MN
519
520 for(i=0; i<128; i++){
521 int stream_num= asf->asfid2avid[i];
d8470737 522 if(stream_num>=0){
30e88789 523 AVCodecContext *codec= s->streams[stream_num]->codec;
d8470737
ZM
524 if (!codec->bit_rate)
525 codec->bit_rate = bitrate[i];
526 if (dar[i].num > 0 && dar[i].den > 0)
18d915dd
ZM
527 av_reduce(&codec->sample_aspect_ratio.num,
528 &codec->sample_aspect_ratio.den,
529 dar[i].num, dar[i].den, INT_MAX);
30e88789
MN
530//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);
531 }
532 }
533
de6d9b64
FB
534 return 0;
535
536 fail:
4c3dff6d 537 for(i=0;i<s->nb_streams;i++) {
de6d9b64 538 AVStream *st = s->streams[i];
bb270c08
DB
539 if (st) {
540 av_free(st->priv_data);
01f4895c 541 av_free(st->codec->extradata);
bb270c08 542 }
1ea4f593 543 av_free(st);
de6d9b64 544 }
de6d9b64
FB
545 return -1;
546}
547
2a10020b
ZK
548#define DO_2BITS(bits, var, defval) \
549 switch (bits & 3) \
550 { \
551 case 3: var = get_le32(pb); rsize += 4; break; \
552 case 2: var = get_le16(pb); rsize += 2; break; \
553 case 1: var = get_byte(pb); rsize++; break; \
554 default: var = defval; break; \
555 }
556
f7835507
MN
557/**
558 *
559 * @return <0 in case of an error
560 */
de6d9b64
FB
561static int asf_get_packet(AVFormatContext *s)
562{
563 ASFContext *asf = s->priv_data;
564 ByteIOContext *pb = &s->pb;
2a10020b 565 uint32_t packet_length, padsize;
0c0d17f3 566 int rsize = 8;
0fd9e6f3
MN
567 int c, d, e, off;
568
569 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
570
571 c=d=e=-1;
572 while(off-- > 0){
573 c=d; d=e;
574 e= get_byte(pb);
575 if(c == 0x82 && !d && !e)
576 break;
577 }
115329f1 578
1359c2d4 579 if (c != 0x82) {
5acdd6e6 580 if (!url_feof(pb))
bb270c08 581 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b 582 }
0c0d17f3 583 if ((c & 0x8f) == 0x82) {
0fd9e6f3 584 if (d || e) {
5acdd6e6 585 if (!url_feof(pb))
bb270c08 586 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 587 return -1;
bb270c08 588 }
0c0d17f3 589 c= get_byte(pb);
0fd9e6f3 590 d= get_byte(pb);
0c0d17f3
MN
591 rsize+=3;
592 }else{
593 url_fseek(pb, -1, SEEK_CUR); //FIXME
de6d9b64 594 }
2a10020b 595
0c0d17f3
MN
596 asf->packet_flags = c;
597 asf->packet_property = d;
2a10020b
ZK
598
599 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
600 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
601 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
602
5b11e081
MN
603 //the following checks prevent overflows and infinite loops
604 if(packet_length >= (1U<<29)){
605 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 606 return -1;
5b11e081 607 }
92216453 608 if(padsize >= packet_length){
5b11e081 609 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 610 return -1;
5b11e081
MN
611 }
612
2a10020b 613 asf->packet_timestamp = get_le32(pb);
de6d9b64 614 get_le16(pb); /* duration */
2141dc37 615 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
616
617 if (asf->packet_flags & 0x01) {
bb270c08 618 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
619 asf->packet_segments = asf->packet_segsizetype & 0x3f;
620 } else {
bb270c08 621 asf->packet_segments = 1;
2a10020b
ZK
622 asf->packet_segsizetype = 0x80;
623 }
624 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
625 if (packet_length < asf->hdr.min_pktsize)
626 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 627 asf->packet_padsize = padsize;
de6d9b64 628#ifdef DEBUG
2a10020b 629 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 630#endif
de6d9b64
FB
631 return 0;
632}
633
ae60a857
MN
634/**
635 *
636 * @return <0 if error
637 */
638static int asf_read_frame_header(AVFormatContext *s){
639 ASFContext *asf = s->priv_data;
640 ByteIOContext *pb = &s->pb;
641 int rsize = 1;
642 int num = get_byte(pb);
559a55ad 643 int64_t ts0, ts1;
ae60a857
MN
644
645 asf->packet_segments--;
646 asf->packet_key_frame = num >> 7;
647 asf->stream_index = asf->asfid2avid[num & 0x7f];
648 // sequence should be ignored!
649 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
650 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
651 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
652//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);
653 if (asf->packet_replic_size >= 8) {
654 asf->packet_obj_size = get_le32(pb);
655 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
656 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
657 return -1;
658 }
659 asf->packet_frag_timestamp = get_le32(pb); // timestamp
559a55ad
MN
660 if(asf->packet_replic_size >= 8+38+4){
661// for(i=0; i<asf->packet_replic_size-8; i++)
662// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
663// av_log(s, AV_LOG_DEBUG, "\n");
664 url_fskip(pb, 10);
665 ts0= get_le64(pb);
666 ts1= get_le64(pb);
667 url_fskip(pb, 12);
668 get_le32(pb);
669 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
670 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
671 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
672 }else
673 url_fskip(pb, asf->packet_replic_size - 8);
ae60a857
MN
674 rsize += asf->packet_replic_size; // FIXME - check validity
675 } else if (asf->packet_replic_size==1){
676 // multipacket - frag_offset is begining timestamp
677 asf->packet_time_start = asf->packet_frag_offset;
678 asf->packet_frag_offset = 0;
679 asf->packet_frag_timestamp = asf->packet_timestamp;
680
681 asf->packet_time_delta = get_byte(pb);
682 rsize++;
683 }else if(asf->packet_replic_size!=0){
684 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
685 return -1;
686 }
687 if (asf->packet_flags & 0x01) {
688 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
689 if(asf->packet_frag_size > asf->packet_size_left - rsize){
690 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
691 return -1;
692 }
ae60a857
MN
693 //printf("Fragsize %d\n", asf->packet_frag_size);
694 } else {
695 asf->packet_frag_size = asf->packet_size_left - rsize;
696 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
697 }
698 if (asf->packet_replic_size == 1) {
699 asf->packet_multi_size = asf->packet_frag_size;
700 if (asf->packet_multi_size > asf->packet_size_left)
701 return -1;
702 }
703 asf->packet_size_left -= rsize;
704 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
705
706 return 0;
707}
708
de6d9b64
FB
709static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
710{
711 ASFContext *asf = s->priv_data;
2a10020b 712 ASFStream *asf_st = 0;
de6d9b64 713 ByteIOContext *pb = &s->pb;
1359c2d4 714 //static int pc = 0;
2a10020b 715 for (;;) {
ceba96cb 716 if(url_feof(pb))
6f3e0b21 717 return AVERROR(EIO);
bb270c08
DB
718 if (asf->packet_size_left < FRAME_HEADER_SIZE
719 || asf->packet_segments < 1) {
720 //asf->packet_size_left <= asf->packet_padsize) {
721 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 722 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 723 assert(ret>=0);
bb270c08
DB
724 /* fail safe */
725 url_fskip(pb, ret);
b04d5d31 726
82b9e4a2 727 asf->packet_pos= url_ftell(&s->pb);
b6eaae39
KED
728 if (asf->data_object_size != (uint64_t)-1 &&
729 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
6f3e0b21 730 return AVERROR(EIO); /* Do not exceed the size of the data object */
bb270c08
DB
731 ret = asf_get_packet(s);
732 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
ceba96cb
MN
733 if (ret < 0)
734 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
2141dc37 735 asf->packet_time_start = 0;
2a10020b 736 continue;
bb270c08
DB
737 }
738 if (asf->packet_time_start == 0) {
ae60a857
MN
739 if(asf_read_frame_header(s) < 0){
740 asf->packet_segments= 0;
236116cb 741 continue;
1305a9d5 742 }
bb270c08 743 if (asf->stream_index < 0
f3356e9c
MN
744 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
745 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
746 ) {
1359c2d4 747 asf->packet_time_start = 0;
bb270c08
DB
748 /* unhandled packet (should not happen) */
749 url_fskip(pb, asf->packet_frag_size);
750 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 751 if(asf->stream_index < 0)
ae60a857 752 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 753 continue;
bb270c08
DB
754 }
755 asf->asf_st = s->streams[asf->stream_index]->priv_data;
756 }
757 asf_st = asf->asf_st;
758
bb270c08
DB
759 if (asf->packet_replic_size == 1) {
760 // frag_offset is here used as the begining timestamp
761 asf->packet_frag_timestamp = asf->packet_time_start;
762 asf->packet_time_start += asf->packet_time_delta;
763 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
764 asf->packet_size_left--;
2141dc37 765 asf->packet_multi_size--;
bb270c08
DB
766 if (asf->packet_multi_size < asf->packet_obj_size)
767 {
768 asf->packet_time_start = 0;
769 url_fskip(pb, asf->packet_multi_size);
770 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 771 continue;
bb270c08
DB
772 }
773 asf->packet_multi_size -= asf->packet_obj_size;
774 //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);
775 }
f8f0a0bd
MN
776 if ( asf_st->pkt.size != asf->packet_obj_size
777 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
200026aa
MN
778 if(asf_st->pkt.data){
779 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
780 asf_st->frag_offset = 0;
781 av_free_packet(&asf_st->pkt);
782 }
bb270c08
DB
783 /* new packet */
784 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
785 asf_st->seq = asf->packet_seq;
786 asf_st->pkt.pts = asf->packet_frag_timestamp;
787 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
788 asf_st->pkt.pos =
789 asf_st->packet_pos= asf->packet_pos;
790//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 791//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 792//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
793 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
794 asf->packet_key_frame = 1;
795 if (asf->packet_key_frame)
796 asf_st->pkt.flags |= PKT_FLAG_KEY;
797 }
798
799 /* read data */
800 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
801 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
802 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
803 asf->packet_size_left -= asf->packet_frag_size;
804 if (asf->packet_size_left < 0)
2141dc37 805 continue;
4c71d727
MN
806
807 if( asf->packet_frag_offset >= asf_st->pkt.size
808 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
809 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
810 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
811 continue;
812 }
813
bb270c08
DB
814 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
815 asf->packet_frag_size);
816 asf_st->frag_offset += asf->packet_frag_size;
817 /* test if whole packet is read */
818 if (asf_st->frag_offset == asf_st->pkt.size) {
819 /* return packet */
820 if (asf_st->ds_span > 1) {
05219463
MN
821 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
822 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
823 }else{
bb270c08 824 /* packet descrambling */
191e8ca7 825 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
826 if (newdata) {
827 int offset = 0;
828 while (offset < asf_st->pkt.size) {
829 int off = offset / asf_st->ds_chunk_size;
830 int row = off / asf_st->ds_span;
831 int col = off % asf_st->ds_span;
832 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
833 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
834
835 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
836 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
837 memcpy(newdata + offset,
838 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
839 asf_st->ds_chunk_size);
840 offset += asf_st->ds_chunk_size;
841 }
842 av_free(asf_st->pkt.data);
843 asf_st->pkt.data = newdata;
844 }
05219463 845 }
bb270c08
DB
846 }
847 asf_st->frag_offset = 0;
b83e83b9 848 *pkt= asf_st->pkt;
bb270c08
DB
849 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
850 asf_st->pkt.size = 0;
851 asf_st->pkt.data = 0;
852 break; // packet completed
853 }
de6d9b64 854 }
de6d9b64
FB
855 return 0;
856}
857
858static int asf_read_close(AVFormatContext *s)
859{
de6d9b64
FB
860 int i;
861
862 for(i=0;i<s->nb_streams;i++) {
bb270c08
DB
863 AVStream *st = s->streams[i];
864 av_free(st->priv_data);
1ae7518d 865 av_free(st->codec->palctrl);
de6d9b64 866 }
de6d9b64
FB
867 return 0;
868}
869
38376f00
KK
870// Added to support seeking after packets have been read
871// If information is not reset, read_packet fails due to
872// leftover information from previous reads
873static void asf_reset_header(AVFormatContext *s)
874{
875 ASFContext *asf = s->priv_data;
82b9e4a2
MN
876 ASFStream *asf_st;
877 int i;
38376f00
KK
878
879 asf->packet_nb_frames = 0;
38376f00
KK
880 asf->packet_size_left = 0;
881 asf->packet_segments = 0;
882 asf->packet_flags = 0;
883 asf->packet_property = 0;
884 asf->packet_timestamp = 0;
885 asf->packet_segsizetype = 0;
886 asf->packet_segments = 0;
887 asf->packet_seq = 0;
888 asf->packet_replic_size = 0;
889 asf->packet_key_frame = 0;
890 asf->packet_padsize = 0;
891 asf->packet_frag_offset = 0;
892 asf->packet_frag_size = 0;
893 asf->packet_frag_timestamp = 0;
894 asf->packet_multi_size = 0;
895 asf->packet_obj_size = 0;
896 asf->packet_time_delta = 0;
897 asf->packet_time_start = 0;
115329f1 898
82b9e4a2
MN
899 for(i=0; i<s->nb_streams; i++){
900 asf_st= s->streams[i]->priv_data;
901 av_free_packet(&asf_st->pkt);
902 asf_st->frag_offset=0;
903 asf_st->seq=0;
904 }
905 asf->asf_st= NULL;
38376f00
KK
906}
907
8d14a25c 908static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
38376f00
KK
909{
910 ASFContext *asf = s->priv_data;
911 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 912 ASFStream *asf_st;
580fb5e7 913 int64_t pts;
82b9e4a2 914 int64_t pos= *ppos;
3e9245a9
MN
915 int i;
916 int64_t start_pos[s->nb_streams];
115329f1 917
3e9245a9
MN
918 for(i=0; i<s->nb_streams; i++){
919 start_pos[i]= pos;
920 }
115329f1 921
8d14a25c
MN
922 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
923 *ppos= pos;
924 url_fseek(&s->pb, pos, SEEK_SET);
115329f1 925
82b9e4a2 926//printf("asf_read_pts\n");
82b9e4a2 927 asf_reset_header(s);
3e9245a9 928 for(;;){
82b9e4a2 929 if (av_read_frame(s, pkt) < 0){
0b93103a 930 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 931 return AV_NOPTS_VALUE;
82b9e4a2 932 }
115329f1 933
38cf2a72 934 pts= pkt->pts;
580fb5e7
MN
935
936 av_free_packet(pkt);
3e9245a9
MN
937 if(pkt->flags&PKT_FLAG_KEY){
938 i= pkt->stream_index;
939
940 asf_st= s->streams[i]->priv_data;
941
0fd9e6f3 942// assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 943 pos= asf_st->packet_pos;
09646bab 944
52e54612 945 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 946 start_pos[i]= asf_st->packet_pos + 1;
115329f1 947
3e9245a9
MN
948 if(pkt->stream_index == stream_index)
949 break;
950 }
951 }
952
953 *ppos= pos;
949b1a13 954//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
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955
956 return pts;
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957}
958
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959static void asf_build_simple_index(AVFormatContext *s, int stream_index)
960{
961 GUID g;
962 ASFContext *asf = s->priv_data;
963 int64_t gsize, itime;
964 int64_t pos, current_pos, index_pts;
965 int i;
966 int pct,ict;
967
968 current_pos = url_ftell(&s->pb);
969
970 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
971 get_guid(&s->pb, &g);
972 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
973 gsize = get_le64(&s->pb);
974 get_guid(&s->pb, &g);
975 itime=get_le64(&s->pb);
976 pct=get_le32(&s->pb);
977 ict=get_le32(&s->pb);
ccd3228e 978 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
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979
980 for (i=0;i<ict;i++){
981 int pktnum=get_le32(&s->pb);
982 int pktct =get_le16(&s->pb);
983 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
984
985 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
986 index_pts=av_rescale(itime, i, 10000);
987
988 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
989 }
52e54612 990 asf->index_read= 1;
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991 }
992 url_fseek(&s->pb, current_pos, SEEK_SET);
993}
994
3ba1438d 995static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 996{
afda223c 997 ASFContext *asf = s->priv_data;
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998 AVStream *st = s->streams[stream_index];
999 int64_t pos;
1000 int index;
115329f1 1001
a602556e 1002 if (asf->packet_size <= 0)
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1003 return -1;
1004
52e54612 1005 if (!asf->index_read)
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1006 asf_build_simple_index(s, stream_index);
1007
52e54612 1008 if(!(asf->index_read && st->index_entries)){
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1009 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1010 return -1;
1011 }else{
1012 index= av_index_search_timestamp(st, pts, flags);
1013 if(index<0)
1014 return -1;
1015
1016 /* find the position */
1017 pos = st->index_entries[index].pos;
1018 pts = st->index_entries[index].timestamp;
1019
1020 // various attempts to find key frame have failed so far
1021 // asf_reset_header(s);
1022 // url_fseek(&s->pb, pos, SEEK_SET);
1023 // key_pos = pos;
1024 // for(i=0;i<16;i++){
1025 // pos = url_ftell(&s->pb);
1026 // if (av_read_frame(s, &pkt) < 0){
1027 // av_log(s, AV_LOG_INFO, "seek failed\n");
1028 // return -1;
1029 // }
1030 // asf_st = s->streams[stream_index]->priv_data;
1031 // pos += st->parser->frame_offset;
1032 //
1033 // if (pkt.size > b) {
1034 // b = pkt.size;
1035 // key_pos = pos;
1036 // }
1037 //
1038 // av_free_packet(&pkt);
1039 // }
1040
1041 /* do the seek */
ccd3228e 1042 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
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1043 url_fseek(&s->pb, pos, SEEK_SET);
1044 }
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1045 asf_reset_header(s);
1046 return 0;
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1047}
1048
ff70e601 1049AVInputFormat asf_demuxer = {
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1050 "asf",
1051 "asf format",
1052 sizeof(ASFContext),
1053 asf_probe,
1054 asf_read_header,
1055 asf_read_packet,
1056 asf_read_close,
2a10020b 1057 asf_read_seek,
8d14a25c 1058 asf_read_pts,
c9a65ca8 1059};