100l: Add missing backslashes.
[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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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
19720f15
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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 */
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DB
21
22#include "libavutil/common.h"
23#include "libavcodec/mpegaudio.h"
de6d9b64 24#include "avformat.h"
9d9f4119 25#include "riff.h"
542993b0 26#include "asf.h"
72be7db4 27#include "asfcrypt.h"
de6d9b64 28
9686df2b 29void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
49ce700a 30
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31#undef NDEBUG
32#include <assert.h>
33
615b92fd 34#define FRAME_HEADER_SIZE 17
115329f1 35// Fix Me! FRAME_HEADER_SIZE may be different.
615b92fd 36
de6d9b64 37static const GUID index_guid = {
24c14d6d 38 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
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FB
39};
40
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RM
41static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
42 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
43};
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44/**********************************/
45/* decoding */
46
47//#define DEBUG
48
49#ifdef DEBUG
5082f759
FR
50#define PRINT_IF_GUID(g,cmp) \
51if (!memcmp(g, &cmp, sizeof(GUID))) \
f94981ea 52 dprintf(NULL, "(GUID: %s) ", #cmp)
5082f759 53
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54static void print_guid(const GUID *g)
55{
56 int i;
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FR
57 PRINT_IF_GUID(g, asf_header);
58 else PRINT_IF_GUID(g, file_header);
59 else PRINT_IF_GUID(g, stream_header);
60 else PRINT_IF_GUID(g, audio_stream);
61 else PRINT_IF_GUID(g, audio_conceal_none);
62 else PRINT_IF_GUID(g, video_stream);
63 else PRINT_IF_GUID(g, video_conceal_none);
ae38261e 64 else PRINT_IF_GUID(g, command_stream);
5082f759
FR
65 else PRINT_IF_GUID(g, comment_header);
66 else PRINT_IF_GUID(g, codec_comment_header);
67 else PRINT_IF_GUID(g, codec_comment1_header);
68 else PRINT_IF_GUID(g, data_header);
69 else PRINT_IF_GUID(g, index_guid);
70 else PRINT_IF_GUID(g, head1_guid);
71 else PRINT_IF_GUID(g, head2_guid);
72 else PRINT_IF_GUID(g, my_guid);
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MN
73 else PRINT_IF_GUID(g, ext_stream_header);
74 else PRINT_IF_GUID(g, extended_content_header);
75 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
76 else PRINT_IF_GUID(g, ext_stream_audio_stream);
30e88789 77 else PRINT_IF_GUID(g, metadata_header);
0e3b6a6f 78 else PRINT_IF_GUID(g, stream_bitrate_guid);
5082f759 79 else
f94981ea 80 dprintf(NULL, "(GUID: unknown) ");
24c14d6d 81 for(i=0;i<16;i++)
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MR
82 dprintf(NULL, " 0x%02x,", (*g)[i]);
83 dprintf(NULL, "}\n");
de6d9b64 84}
6df84c3a 85#undef PRINT_IF_GUID
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86#else
87#define print_guid(g)
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88#endif
89
90static void get_guid(ByteIOContext *s, GUID *g)
91{
24c14d6d 92 assert(sizeof(*g) == 16);
3dc761a4 93 get_buffer(s, *g, sizeof(*g));
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FB
94}
95
96#if 0
97static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
98{
99 int len, c;
100 char *q;
101
102 len = get_le16(pb);
103 q = buf;
104 while (len > 0) {
105 c = get_le16(pb);
106 if ((q - buf) < buf_size - 1)
107 *q++ = c;
108 len--;
109 }
110 *q = '\0';
111}
112#endif
113
114static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
115{
db5c43b4
ZM
116 char* q = buf;
117 len /= 2;
118 while (len--) {
119 uint8_t tmp;
120 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
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FB
121 }
122 *q = '\0';
123}
124
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125static int asf_probe(AVProbeData *pd)
126{
c9a65ca8 127 /* check file header */
24c14d6d 128 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
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129 return AVPROBE_SCORE_MAX;
130 else
131 return 0;
132}
133
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134static int get_value(ByteIOContext *pb, int type){
135 switch(type){
136 case 2: return get_le32(pb);
137 case 3: return get_le32(pb);
138 case 4: return get_le64(pb);
139 case 5: return get_le16(pb);
140 default:return INT_MIN;
141 }
142}
143
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144static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
145{
c9a65ca8 146 ASFContext *asf = s->priv_data;
de6d9b64 147 GUID g;
899681cd 148 ByteIOContext *pb = s->pb;
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FB
149 AVStream *st;
150 ASFStream *asf_st;
e095026a 151 int size, i;
0c1a9eda 152 int64_t gsize;
30e88789 153 AVRational dar[128];
d8470737 154 uint32_t bitrate[128];
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MN
155
156 memset(dar, 0, sizeof(dar));
d8470737 157 memset(bitrate, 0, sizeof(bitrate));
de6d9b64 158
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FB
159 get_guid(pb, &g);
160 if (memcmp(&g, &asf_header, sizeof(GUID)))
ccafd472 161 return -1;
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162 get_le64(pb);
163 get_le32(pb);
164 get_byte(pb);
165 get_byte(pb);
2141dc37 166 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
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FB
167 for(;;) {
168 get_guid(pb, &g);
169 gsize = get_le64(pb);
f94981ea 170 dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
de6d9b64 171 print_guid(&g);
f94981ea 172 dprintf(s, " size=0x%"PRIx64"\n", gsize);
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MN
173 if (!memcmp(&g, &data_header, sizeof(GUID))) {
174 asf->data_object_offset = url_ftell(pb);
175 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
176 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
177 asf->data_object_size = gsize - 24;
178 } else {
179 asf->data_object_size = (uint64_t)-1;
180 }
181 break;
182 }
de6d9b64 183 if (gsize < 24)
ccafd472 184 return -1;
de6d9b64 185 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b 186 get_guid(pb, &asf->hdr.guid);
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DB
187 asf->hdr.file_size = get_le64(pb);
188 asf->hdr.create_time = get_le64(pb);
6bb2a2df 189 asf->nb_packets = get_le64(pb);
bb270c08 190 asf->hdr.play_time = get_le64(pb);
b4bbcd63 191 asf->hdr.send_time = get_le64(pb);
bb270c08
DB
192 asf->hdr.preroll = get_le32(pb);
193 asf->hdr.ignore = get_le32(pb);
194 asf->hdr.flags = get_le32(pb);
195 asf->hdr.min_pktsize = get_le32(pb);
196 asf->hdr.max_pktsize = get_le32(pb);
197 asf->hdr.max_bitrate = get_le32(pb);
198 asf->packet_size = asf->hdr.max_pktsize;
de6d9b64 199 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
fb65d2ca
DP
200 enum CodecType type;
201 int type_specific_size, sizeX;
7ad5455c 202 uint64_t total_size;
de6d9b64 203 unsigned int tag1;
371bf806 204 int64_t pos1, pos2, start_time;
6fea687e 205 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
2a10020b 206
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FB
207 pos1 = url_ftell(pb);
208
247eadca 209 st = av_new_stream(s, 0);
de6d9b64 210 if (!st)
ccafd472 211 return AVERROR(ENOMEM);
9ee91c2f 212 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
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213 asf_st = av_mallocz(sizeof(ASFStream));
214 if (!asf_st)
ccafd472 215 return AVERROR(ENOMEM);
de6d9b64 216 st->priv_data = asf_st;
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MN
217 start_time = asf->hdr.preroll;
218
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RM
219 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
220 st->duration = asf->hdr.send_time /
371bf806 221 (10000000 / 1000) - start_time;
73fe1052 222 }
de6d9b64 223 get_guid(pb, &g);
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MN
224
225 test_for_ext_stream_audio = 0;
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FB
226 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
227 type = CODEC_TYPE_AUDIO;
228 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
229 type = CODEC_TYPE_VIDEO;
ae38261e 230 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
3e86dba2 231 type = CODEC_TYPE_DATA;
88141c91
MN
232 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
233 test_for_ext_stream_audio = 1;
234 type = CODEC_TYPE_UNKNOWN;
de6d9b64 235 } else {
ccafd472 236 return -1;
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FB
237 }
238 get_guid(pb, &g);
239 total_size = get_le64(pb);
2e7973bb 240 type_specific_size = get_le32(pb);
de6d9b64 241 get_le32(pb);
bb270c08 242 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 243 // mapping of asf ID to AV stream ID;
247eadca 244 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 245
de6d9b64 246 get_le32(pb);
88141c91
MN
247
248 if (test_for_ext_stream_audio) {
249 get_guid(pb, &g);
250 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
251 type = CODEC_TYPE_AUDIO;
6fea687e 252 is_dvr_ms_audio=1;
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MN
253 get_guid(pb, &g);
254 get_le32(pb);
255 get_le32(pb);
256 get_le32(pb);
257 get_guid(pb, &g);
258 get_le32(pb);
259 }
260 }
261
bb270c08 262 st->codec->codec_type = type;
de6d9b64 263 if (type == CODEC_TYPE_AUDIO) {
01f4895c 264 get_wav_header(pb, st->codec, type_specific_size);
6fea687e
JD
265 if (is_dvr_ms_audio) {
266 // codec_id and codec_tag are unreliable in dvr_ms
267 // files. Set them later by probing stream.
0bef08e5 268 st->codec->codec_id = CODEC_ID_PROBE;
6fea687e
JD
269 st->codec->codec_tag = 0;
270 }
57004ff1 271 st->need_parsing = AVSTREAM_PARSE_FULL;
bb270c08
DB
272 /* We have to init the frame size at some point .... */
273 pos2 = url_ftell(pb);
b9c6d01b 274 if (gsize >= (pos2 + 8 - pos1 + 24)) {
bb270c08
DB
275 asf_st->ds_span = get_byte(pb);
276 asf_st->ds_packet_size = get_le16(pb);
277 asf_st->ds_chunk_size = get_le16(pb);
6bb2a2df
MN
278 get_le16(pb); //ds_data_size
279 get_byte(pb); //ds_silence_data
bb270c08
DB
280 }
281 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
282 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
283 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
284 if (asf_st->ds_span > 1) {
285 if (!asf_st->ds_chunk_size
05219463
MN
286 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
287 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
bb270c08
DB
288 asf_st->ds_span = 0; // disable descrambling
289 }
01f4895c 290 switch (st->codec->codec_id) {
80783dc2 291 case CODEC_ID_MP3:
01f4895c 292 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
293 break;
294 case CODEC_ID_PCM_S16LE:
295 case CODEC_ID_PCM_S16BE:
296 case CODEC_ID_PCM_U16LE:
297 case CODEC_ID_PCM_U16BE:
298 case CODEC_ID_PCM_S8:
299 case CODEC_ID_PCM_U8:
300 case CODEC_ID_PCM_ALAW:
301 case CODEC_ID_PCM_MULAW:
01f4895c 302 st->codec->frame_size = 1;
f80c1ac0
PG
303 break;
304 default:
305 /* This is probably wrong, but it prevents a crash later */
01f4895c 306 st->codec->frame_size = 1;
f80c1ac0
PG
307 break;
308 }
88141c91 309 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 310 get_le32(pb);
de6d9b64
FB
311 get_le32(pb);
312 get_byte(pb);
313 size = get_le16(pb); /* size */
0ffd77b9 314 sizeX= get_le32(pb); /* size */
01f4895c 315 st->codec->width = get_le32(pb);
bb270c08 316 st->codec->height = get_le32(pb);
2a10020b 317 /* not available for asf */
de6d9b64 318 get_le16(pb); /* panes */
dd1c8f3e 319 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
de6d9b64 320 tag1 = get_le32(pb);
bb270c08 321 url_fskip(pb, 20);
0ffd77b9
MN
322// av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
323 size= sizeX;
bb270c08
DB
324 if (size > 40) {
325 st->codec->extradata_size = size - 40;
326 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
327 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
328 }
5e29abf8
RT
329
330 /* Extract palette from extradata if bpp <= 8 */
331 /* This code assumes that extradata contains only palette */
332 /* This is true for all paletted codecs implemented in ffmpeg */
dd1c8f3e 333 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
01f4895c 334 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 335#ifdef WORDS_BIGENDIAN
01f4895c
MN
336 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
337 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 338#else
01f4895c
MN
339 memcpy(st->codec->palctrl->palette, st->codec->extradata,
340 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 341#endif
01f4895c 342 st->codec->palctrl->palette_changed = 1;
5e29abf8
RT
343 }
344
01f4895c 345 st->codec->codec_tag = tag1;
bb270c08 346 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4 347 if(tag1 == MKTAG('D', 'V', 'R', ' '))
57004ff1 348 st->need_parsing = AVSTREAM_PARSE_FULL;
de6d9b64
FB
349 }
350 pos2 = url_ftell(pb);
351 url_fskip(pb, gsize - (pos2 - pos1 + 24));
de6d9b64
FB
352 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
353 int len1, len2, len3, len4, len5;
354
355 len1 = get_le16(pb);
356 len2 = get_le16(pb);
357 len3 = get_le16(pb);
358 len4 = get_le16(pb);
359 len5 = get_le16(pb);
4e15cc8b
MN
360 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
361 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
de6d9b64 362 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
4e15cc8b 363 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
bb270c08 364 url_fskip(pb, len5);
0e3b6a6f
RM
365 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
366 int stream_count = get_le16(pb);
367 int j;
368
369// av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
370// av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
371 for(j = 0; j < stream_count; j++) {
372 int flags, bitrate, stream_id;
373
374 flags= get_le16(pb);
375 bitrate= get_le32(pb);
376 stream_id= (flags & 0x7f);
377// av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
a9054d91 378 asf->stream_bitrates[stream_id]= bitrate;
0e3b6a6f 379 }
d13431cd
KK
380 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
381 int desc_count, i;
382
383 desc_count = get_le16(pb);
384 for(i=0;i<desc_count;i++)
385 {
052aa2ad
SH
386 int name_len,value_type,value_len;
387 uint64_t value_num = 0;
d045b8c1 388 char name[1024];
d13431cd
KK
389
390 name_len = get_le16(pb);
d045b8c1 391 get_str16_nolen(pb, name_len, name, sizeof(name));
d13431cd
KK
392 value_type = get_le16(pb);
393 value_len = get_le16(pb);
16428e63 394 if (value_type <= 1) // unicode or byte
d13431cd 395 {
5e2a4855
MN
396 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
397 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
0d4e281c
PB
398 else if(!strcmp(name,"WM/Year" )) {
399 char year[8];
400 get_str16_nolen(pb, value_len, year, sizeof(year));
401 s->year = atoi(year);
402 }
6ec14b33 403 else if(!strcmp(name,"WM/Track") && s->track == 0) {
629272d8
PB
404 char track[8];
405 get_str16_nolen(pb, value_len, track, sizeof(track));
406 s->track = strtol(track, NULL, 10) + 1;
407 }
408 else if(!strcmp(name,"WM/TrackNumber")) {
409 char track[8];
410 get_str16_nolen(pb, value_len, track, sizeof(track));
411 s->track = strtol(track, NULL, 10);
412 }
5e2a4855 413 else url_fskip(pb, value_len);
d13431cd 414 }
16428e63 415 else if (value_type <= 5) // boolean or DWORD or QWORD or WORD
d13431cd 416 {
30e88789 417 value_num= get_value(pb, value_type);
6ec14b33 418 if (!strcmp(name,"WM/Track" ) && s->track == 0) s->track = value_num + 1;
4e15cc8b 419 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
11c55efa
MN
420 }else
421 url_fskip(pb, value_len);
d13431cd 422 }
30e88789
MN
423 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
424 int n, stream_num, name_len, value_len, value_type, value_num;
425 n = get_le16(pb);
426
427 for(i=0;i<n;i++) {
428 char name[1024];
429
430 get_le16(pb); //lang_list_index
431 stream_num= get_le16(pb);
432 name_len= get_le16(pb);
433 value_type= get_le16(pb);
434 value_len= get_le32(pb);
435
436 get_str16_nolen(pb, name_len, name, sizeof(name));
437//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
755bfeab 438 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
439 url_fskip(pb, value_len - 2);
440
441 if(stream_num<128){
442 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
443 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
444 }
445 }
88141c91
MN
446 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
447 int ext_len, payload_ext_ct, stream_ct;
d8470737 448 uint32_t ext_d, leak_rate, stream_num;
1bd86246 449 int64_t pos_ex_st;
88141c91
MN
450 pos_ex_st = url_ftell(pb);
451
de3ae959
MN
452 get_le64(pb); // starttime
453 get_le64(pb); // endtime
d8470737 454 leak_rate = get_le32(pb); // leak-datarate
de3ae959
MN
455 get_le32(pb); // bucket-datasize
456 get_le32(pb); // init-bucket-fullness
457 get_le32(pb); // alt-leak-datarate
458 get_le32(pb); // alt-bucket-datasize
459 get_le32(pb); // alt-init-bucket-fullness
460 get_le32(pb); // max-object-size
461 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
d8470737 462 stream_num = get_le16(pb); // stream-num
de3ae959
MN
463 get_le16(pb); // stream-language-id-index
464 get_le64(pb); // avg frametime in 100ns units
465 stream_ct = get_le16(pb); //stream-name-count
466 payload_ext_ct = get_le16(pb); //payload-extension-system-count
88141c91 467
d8470737
ZM
468 if (stream_num < 128)
469 bitrate[stream_num] = leak_rate;
470
88141c91
MN
471 for (i=0; i<stream_ct; i++){
472 get_le16(pb);
473 ext_len = get_le16(pb);
474 url_fseek(pb, ext_len, SEEK_CUR);
475 }
476
477 for (i=0; i<payload_ext_ct; i++){
478 get_guid(pb, &g);
479 ext_d=get_le16(pb);
480 ext_len=get_le32(pb);
481 url_fseek(pb, ext_len, SEEK_CUR);
482 }
483
484 // there could be a optional stream properties object to follow
485 // if so the next iteration will pick it up
de6d9b64
FB
486 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
487 int v1, v2;
488 get_guid(pb, &g);
489 v1 = get_le32(pb);
490 v2 = get_le16(pb);
88141c91 491#if 0
de6d9b64
FB
492 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
493 int len, v1, n, num;
494 char str[256], *q;
495 char tag[16];
496
497 get_guid(pb, &g);
498 print_guid(&g);
2a10020b 499
de6d9b64
FB
500 n = get_le32(pb);
501 for(i=0;i<n;i++) {
502 num = get_le16(pb); /* stream number */
503 get_str16(pb, str, sizeof(str));
504 get_str16(pb, str, sizeof(str));
505 len = get_le16(pb);
506 q = tag;
507 while (len > 0) {
508 v1 = get_byte(pb);
509 if ((q - tag) < sizeof(tag) - 1)
510 *q++ = v1;
511 len--;
512 }
513 *q = '\0';
514 }
515#endif
516 } else if (url_feof(pb)) {
ccafd472 517 return -1;
de6d9b64
FB
518 } else {
519 url_fseek(pb, gsize - 24, SEEK_CUR);
520 }
521 }
522 get_guid(pb, &g);
523 get_le64(pb);
524 get_byte(pb);
525 get_byte(pb);
2141dc37 526 if (url_feof(pb))
ccafd472 527 return -1;
2141dc37 528 asf->data_offset = url_ftell(pb);
de6d9b64
FB
529 asf->packet_size_left = 0;
530
30e88789
MN
531
532 for(i=0; i<128; i++){
533 int stream_num= asf->asfid2avid[i];
d8470737 534 if(stream_num>=0){
59729451
AJ
535 AVStream *st = s->streams[stream_num];
536 if (!st->codec->bit_rate)
537 st->codec->bit_rate = bitrate[i];
d8470737 538 if (dar[i].num > 0 && dar[i].den > 0)
59729451
AJ
539 av_reduce(&st->sample_aspect_ratio.num,
540 &st->sample_aspect_ratio.den,
18d915dd 541 dar[i].num, dar[i].den, INT_MAX);
59729451 542//av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
30e88789
MN
543 }
544 }
545
de6d9b64 546 return 0;
de6d9b64
FB
547}
548
2a10020b
ZK
549#define DO_2BITS(bits, var, defval) \
550 switch (bits & 3) \
551 { \
552 case 3: var = get_le32(pb); rsize += 4; break; \
553 case 2: var = get_le16(pb); rsize += 2; break; \
554 case 1: var = get_byte(pb); rsize++; break; \
555 default: var = defval; break; \
556 }
557
f7835507
MN
558/**
559 *
560 * @return <0 in case of an error
561 */
de6d9b64
FB
562static int asf_get_packet(AVFormatContext *s)
563{
564 ASFContext *asf = s->priv_data;
899681cd 565 ByteIOContext *pb = s->pb;
2a10020b 566 uint32_t packet_length, padsize;
0c0d17f3 567 int rsize = 8;
0fd9e6f3
MN
568 int c, d, e, off;
569
022f0b7c 570 off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
0fd9e6f3
MN
571
572 c=d=e=-1;
573 while(off-- > 0){
574 c=d; d=e;
575 e= get_byte(pb);
576 if(c == 0x82 && !d && !e)
577 break;
578 }
115329f1 579
1359c2d4 580 if (c != 0x82) {
5acdd6e6 581 if (!url_feof(pb))
bb270c08 582 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b 583 }
0c0d17f3 584 if ((c & 0x8f) == 0x82) {
0fd9e6f3 585 if (d || e) {
5acdd6e6 586 if (!url_feof(pb))
bb270c08 587 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 588 return -1;
bb270c08 589 }
0c0d17f3 590 c= get_byte(pb);
0fd9e6f3 591 d= get_byte(pb);
0c0d17f3
MN
592 rsize+=3;
593 }else{
594 url_fseek(pb, -1, SEEK_CUR); //FIXME
de6d9b64 595 }
2a10020b 596
0c0d17f3
MN
597 asf->packet_flags = c;
598 asf->packet_property = d;
2a10020b
ZK
599
600 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
601 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
602 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
603
5b11e081
MN
604 //the following checks prevent overflows and infinite loops
605 if(packet_length >= (1U<<29)){
606 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 607 return -1;
5b11e081 608 }
92216453 609 if(padsize >= packet_length){
5b11e081 610 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 611 return -1;
5b11e081
MN
612 }
613
2a10020b 614 asf->packet_timestamp = get_le32(pb);
de6d9b64 615 get_le16(pb); /* duration */
2141dc37 616 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
617
618 if (asf->packet_flags & 0x01) {
bb270c08 619 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
620 asf->packet_segments = asf->packet_segsizetype & 0x3f;
621 } else {
bb270c08 622 asf->packet_segments = 1;
2a10020b
ZK
623 asf->packet_segsizetype = 0x80;
624 }
625 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
626 if (packet_length < asf->hdr.min_pktsize)
627 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 628 asf->packet_padsize = padsize;
f94981ea 629 dprintf(s, "packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64
FB
630 return 0;
631}
632
ae60a857
MN
633/**
634 *
635 * @return <0 if error
636 */
637static int asf_read_frame_header(AVFormatContext *s){
638 ASFContext *asf = s->priv_data;
899681cd 639 ByteIOContext *pb = s->pb;
ae60a857
MN
640 int rsize = 1;
641 int num = get_byte(pb);
559a55ad 642 int64_t ts0, ts1;
ae60a857
MN
643
644 asf->packet_segments--;
645 asf->packet_key_frame = num >> 7;
646 asf->stream_index = asf->asfid2avid[num & 0x7f];
647 // sequence should be ignored!
648 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
649 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
650 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
651//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);
652 if (asf->packet_replic_size >= 8) {
653 asf->packet_obj_size = get_le32(pb);
654 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
655 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
656 return -1;
657 }
658 asf->packet_frag_timestamp = get_le32(pb); // timestamp
559a55ad
MN
659 if(asf->packet_replic_size >= 8+38+4){
660// for(i=0; i<asf->packet_replic_size-8; i++)
661// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
662// av_log(s, AV_LOG_DEBUG, "\n");
663 url_fskip(pb, 10);
664 ts0= get_le64(pb);
665 ts1= get_le64(pb);
666 url_fskip(pb, 12);
667 get_le32(pb);
668 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
669 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
670 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
671 }else
672 url_fskip(pb, asf->packet_replic_size - 8);
ae60a857
MN
673 rsize += asf->packet_replic_size; // FIXME - check validity
674 } else if (asf->packet_replic_size==1){
efc90ebf 675 // multipacket - frag_offset is beginning timestamp
ae60a857
MN
676 asf->packet_time_start = asf->packet_frag_offset;
677 asf->packet_frag_offset = 0;
678 asf->packet_frag_timestamp = asf->packet_timestamp;
679
680 asf->packet_time_delta = get_byte(pb);
681 rsize++;
682 }else if(asf->packet_replic_size!=0){
683 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
684 return -1;
685 }
686 if (asf->packet_flags & 0x01) {
687 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
688 if(asf->packet_frag_size > asf->packet_size_left - rsize){
689 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
690 return -1;
691 }
ae60a857
MN
692 //printf("Fragsize %d\n", asf->packet_frag_size);
693 } else {
694 asf->packet_frag_size = asf->packet_size_left - rsize;
695 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
696 }
697 if (asf->packet_replic_size == 1) {
698 asf->packet_multi_size = asf->packet_frag_size;
699 if (asf->packet_multi_size > asf->packet_size_left)
700 return -1;
701 }
702 asf->packet_size_left -= rsize;
703 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
704
705 return 0;
706}
707
de6d9b64
FB
708static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
709{
710 ASFContext *asf = s->priv_data;
2a10020b 711 ASFStream *asf_st = 0;
899681cd 712 ByteIOContext *pb = s->pb;
2a10020b 713 for (;;) {
ceba96cb 714 if(url_feof(pb))
6f3e0b21 715 return AVERROR(EIO);
bb270c08
DB
716 if (asf->packet_size_left < FRAME_HEADER_SIZE
717 || asf->packet_segments < 1) {
718 //asf->packet_size_left <= asf->packet_padsize) {
719 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 720 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 721 assert(ret>=0);
bb270c08
DB
722 /* fail safe */
723 url_fskip(pb, ret);
b04d5d31 724
022f0b7c 725 asf->packet_pos= url_ftell(pb);
b6eaae39
KED
726 if (asf->data_object_size != (uint64_t)-1 &&
727 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
6f3e0b21 728 return AVERROR(EIO); /* Do not exceed the size of the data object */
bb270c08 729 ret = asf_get_packet(s);
ceba96cb
MN
730 if (ret < 0)
731 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
2141dc37 732 asf->packet_time_start = 0;
2a10020b 733 continue;
bb270c08
DB
734 }
735 if (asf->packet_time_start == 0) {
ae60a857
MN
736 if(asf_read_frame_header(s) < 0){
737 asf->packet_segments= 0;
236116cb 738 continue;
1305a9d5 739 }
bb270c08 740 if (asf->stream_index < 0
f3356e9c
MN
741 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
742 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
743 ) {
1359c2d4 744 asf->packet_time_start = 0;
bb270c08
DB
745 /* unhandled packet (should not happen) */
746 url_fskip(pb, asf->packet_frag_size);
747 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 748 if(asf->stream_index < 0)
ae60a857 749 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 750 continue;
bb270c08
DB
751 }
752 asf->asf_st = s->streams[asf->stream_index]->priv_data;
753 }
754 asf_st = asf->asf_st;
755
bb270c08 756 if (asf->packet_replic_size == 1) {
efc90ebf 757 // frag_offset is here used as the beginning timestamp
bb270c08
DB
758 asf->packet_frag_timestamp = asf->packet_time_start;
759 asf->packet_time_start += asf->packet_time_delta;
760 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
761 asf->packet_size_left--;
2141dc37 762 asf->packet_multi_size--;
bb270c08
DB
763 if (asf->packet_multi_size < asf->packet_obj_size)
764 {
765 asf->packet_time_start = 0;
766 url_fskip(pb, asf->packet_multi_size);
767 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 768 continue;
bb270c08
DB
769 }
770 asf->packet_multi_size -= asf->packet_obj_size;
771 //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);
772 }
60ff1c44
MN
773 if( /*asf->packet_frag_size == asf->packet_obj_size*/
774 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
775 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
776 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
777 asf_st->frag_offset, asf->packet_frag_size,
778 asf->packet_obj_size, asf_st->pkt.size);
779 asf->packet_obj_size= asf_st->pkt.size;
780 }
781
f8f0a0bd
MN
782 if ( asf_st->pkt.size != asf->packet_obj_size
783 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
200026aa
MN
784 if(asf_st->pkt.data){
785 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
786 asf_st->frag_offset = 0;
787 av_free_packet(&asf_st->pkt);
788 }
bb270c08
DB
789 /* new packet */
790 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
791 asf_st->seq = asf->packet_seq;
eb63b051 792 asf_st->pkt.dts = asf->packet_frag_timestamp;
bb270c08 793 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
794 asf_st->pkt.pos =
795 asf_st->packet_pos= asf->packet_pos;
796//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 797//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 798//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
799 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
800 asf->packet_key_frame = 1;
801 if (asf->packet_key_frame)
802 asf_st->pkt.flags |= PKT_FLAG_KEY;
803 }
804
805 /* read data */
806 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
807 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
808 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
809 asf->packet_size_left -= asf->packet_frag_size;
810 if (asf->packet_size_left < 0)
2141dc37 811 continue;
4c71d727
MN
812
813 if( asf->packet_frag_offset >= asf_st->pkt.size
814 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
815 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
816 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
817 continue;
818 }
819
bb270c08
DB
820 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
821 asf->packet_frag_size);
72be7db4
RD
822 if (s->key && s->keylen == 20)
823 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
824 asf->packet_frag_size);
bb270c08
DB
825 asf_st->frag_offset += asf->packet_frag_size;
826 /* test if whole packet is read */
827 if (asf_st->frag_offset == asf_st->pkt.size) {
da0b94f5
MN
828 //workaround for macroshit radio DVR-MS files
829 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
830 && asf_st->pkt.size > 100){
831 int i;
832 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
833 if(i == asf_st->pkt.size){
834 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
835 asf_st->frag_offset = 0;
836 av_free_packet(&asf_st->pkt);
837 continue;
838 }
839 }
840
bb270c08
DB
841 /* return packet */
842 if (asf_st->ds_span > 1) {
05219463 843 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
b43387d4 844 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
05219463 845 }else{
bb270c08 846 /* packet descrambling */
191e8ca7 847 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
848 if (newdata) {
849 int offset = 0;
850 while (offset < asf_st->pkt.size) {
851 int off = offset / asf_st->ds_chunk_size;
852 int row = off / asf_st->ds_span;
853 int col = off % asf_st->ds_span;
854 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
855 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
856
857 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
858 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
859 memcpy(newdata + offset,
860 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
861 asf_st->ds_chunk_size);
862 offset += asf_st->ds_chunk_size;
863 }
864 av_free(asf_st->pkt.data);
865 asf_st->pkt.data = newdata;
866 }
05219463 867 }
bb270c08
DB
868 }
869 asf_st->frag_offset = 0;
b83e83b9 870 *pkt= asf_st->pkt;
bb270c08
DB
871 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
872 asf_st->pkt.size = 0;
873 asf_st->pkt.data = 0;
874 break; // packet completed
875 }
de6d9b64 876 }
de6d9b64
FB
877 return 0;
878}
879
38376f00
KK
880// Added to support seeking after packets have been read
881// If information is not reset, read_packet fails due to
882// leftover information from previous reads
883static void asf_reset_header(AVFormatContext *s)
884{
885 ASFContext *asf = s->priv_data;
82b9e4a2
MN
886 ASFStream *asf_st;
887 int i;
38376f00
KK
888
889 asf->packet_nb_frames = 0;
38376f00
KK
890 asf->packet_size_left = 0;
891 asf->packet_segments = 0;
892 asf->packet_flags = 0;
893 asf->packet_property = 0;
894 asf->packet_timestamp = 0;
895 asf->packet_segsizetype = 0;
896 asf->packet_segments = 0;
897 asf->packet_seq = 0;
898 asf->packet_replic_size = 0;
899 asf->packet_key_frame = 0;
900 asf->packet_padsize = 0;
901 asf->packet_frag_offset = 0;
902 asf->packet_frag_size = 0;
903 asf->packet_frag_timestamp = 0;
904 asf->packet_multi_size = 0;
905 asf->packet_obj_size = 0;
906 asf->packet_time_delta = 0;
907 asf->packet_time_start = 0;
115329f1 908
82b9e4a2
MN
909 for(i=0; i<s->nb_streams; i++){
910 asf_st= s->streams[i]->priv_data;
911 av_free_packet(&asf_st->pkt);
912 asf_st->frag_offset=0;
913 asf_st->seq=0;
914 }
915 asf->asf_st= NULL;
38376f00
KK
916}
917
5d25d2a9
DB
918static int asf_read_close(AVFormatContext *s)
919{
920 int i;
921
922 asf_reset_header(s);
923 for(i=0;i<s->nb_streams;i++) {
924 AVStream *st = s->streams[i];
5d25d2a9
DB
925 av_free(st->codec->palctrl);
926 }
927 return 0;
928}
929
8d14a25c 930static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
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931{
932 ASFContext *asf = s->priv_data;
933 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 934 ASFStream *asf_st;
580fb5e7 935 int64_t pts;
82b9e4a2 936 int64_t pos= *ppos;
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937 int i;
938 int64_t start_pos[s->nb_streams];
115329f1 939
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940 for(i=0; i<s->nb_streams; i++){
941 start_pos[i]= pos;
942 }
115329f1 943
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944 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
945 *ppos= pos;
899681cd 946 url_fseek(s->pb, pos, SEEK_SET);
115329f1 947
82b9e4a2 948//printf("asf_read_pts\n");
82b9e4a2 949 asf_reset_header(s);
3e9245a9 950 for(;;){
82b9e4a2 951 if (av_read_frame(s, pkt) < 0){
0b93103a 952 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 953 return AV_NOPTS_VALUE;
82b9e4a2 954 }
115329f1 955
38cf2a72 956 pts= pkt->pts;
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957
958 av_free_packet(pkt);
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959 if(pkt->flags&PKT_FLAG_KEY){
960 i= pkt->stream_index;
961
962 asf_st= s->streams[i]->priv_data;
963
0fd9e6f3 964// assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 965 pos= asf_st->packet_pos;
09646bab 966
52e54612 967 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 968 start_pos[i]= asf_st->packet_pos + 1;
115329f1 969
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970 if(pkt->stream_index == stream_index)
971 break;
972 }
973 }
974
975 *ppos= pos;
949b1a13 976//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
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977
978 return pts;
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979}
980
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981static void asf_build_simple_index(AVFormatContext *s, int stream_index)
982{
983 GUID g;
984 ASFContext *asf = s->priv_data;
985 int64_t gsize, itime;
986 int64_t pos, current_pos, index_pts;
987 int i;
988 int pct,ict;
989
899681cd 990 current_pos = url_ftell(s->pb);
56c96a22 991
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992 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
993 get_guid(s->pb, &g);
56c96a22 994 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
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995 gsize = get_le64(s->pb);
996 get_guid(s->pb, &g);
997 itime=get_le64(s->pb);
998 pct=get_le32(s->pb);
999 ict=get_le32(s->pb);
ccd3228e 1000 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
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1001
1002 for (i=0;i<ict;i++){
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1003 int pktnum=get_le32(s->pb);
1004 int pktct =get_le16(s->pb);
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1005 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1006
1007 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1008 index_pts=av_rescale(itime, i, 10000);
1009
1010 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1011 }
52e54612 1012 asf->index_read= 1;
56c96a22 1013 }
899681cd 1014 url_fseek(s->pb, current_pos, SEEK_SET);
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1015}
1016
3ba1438d 1017static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 1018{
afda223c 1019 ASFContext *asf = s->priv_data;
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1020 AVStream *st = s->streams[stream_index];
1021 int64_t pos;
1022 int index;
115329f1 1023
a602556e 1024 if (asf->packet_size <= 0)
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1025 return -1;
1026
fa13095a 1027 /* Try using the protocol's read_seek if available */
fd2982a0 1028 if(s->pb) {
fa13095a
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1029 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1030 if(ret >= 0)
1031 asf_reset_header(s);
fd2982a0 1032 if (ret != AVERROR(ENOSYS))
cd31f8dc 1033 return ret;
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1034 }
1035
52e54612 1036 if (!asf->index_read)
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1037 asf_build_simple_index(s, stream_index);
1038
52e54612 1039 if(!(asf->index_read && st->index_entries)){
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1040 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1041 return -1;
1042 }else{
1043 index= av_index_search_timestamp(st, pts, flags);
1044 if(index<0)
1045 return -1;
1046
1047 /* find the position */
1048 pos = st->index_entries[index].pos;
1049 pts = st->index_entries[index].timestamp;
1050
1051 // various attempts to find key frame have failed so far
1052 // asf_reset_header(s);
899681cd 1053 // url_fseek(s->pb, pos, SEEK_SET);
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1054 // key_pos = pos;
1055 // for(i=0;i<16;i++){
899681cd 1056 // pos = url_ftell(s->pb);
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1057 // if (av_read_frame(s, &pkt) < 0){
1058 // av_log(s, AV_LOG_INFO, "seek failed\n");
1059 // return -1;
1060 // }
1061 // asf_st = s->streams[stream_index]->priv_data;
1062 // pos += st->parser->frame_offset;
1063 //
1064 // if (pkt.size > b) {
1065 // b = pkt.size;
1066 // key_pos = pos;
1067 // }
1068 //
1069 // av_free_packet(&pkt);
1070 // }
1071
1072 /* do the seek */
ccd3228e 1073 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
899681cd 1074 url_fseek(s->pb, pos, SEEK_SET);
56c96a22 1075 }
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1076 asf_reset_header(s);
1077 return 0;
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1078}
1079
ff70e601 1080AVInputFormat asf_demuxer = {
c9a65ca8 1081 "asf",
bde15e74 1082 NULL_IF_CONFIG_SMALL("ASF format"),
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FB
1083 sizeof(ASFContext),
1084 asf_probe,
1085 asf_read_header,
1086 asf_read_packet,
1087 asf_read_close,
2a10020b 1088 asf_read_seek,
8d14a25c 1089 asf_read_pts,
c9a65ca8 1090};