Don't strip the first three characters off of any metadata in ASF file.
[libav.git] / libavformat / asfdec.c
CommitLineData
de6d9b64 1/*
7fbde343 2 * ASF compatible demuxer
406792e7 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
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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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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
b8b00d94 37static const ff_asf_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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39};
40
b8b00d94 41static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
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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 50#define PRINT_IF_GUID(g,cmp) \
4d0c3dc0 51if (!guidcmp(g, &cmp)) \
f94981ea 52 dprintf(NULL, "(GUID: %s) ", #cmp)
5082f759 53
b8b00d94 54static void print_guid(const ff_asf_guid *g)
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55{
56 int i;
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57 PRINT_IF_GUID(g, ff_asf_header);
58 else PRINT_IF_GUID(g, ff_asf_file_header);
59 else PRINT_IF_GUID(g, ff_asf_stream_header);
60 else PRINT_IF_GUID(g, ff_asf_audio_stream);
61 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
62 else PRINT_IF_GUID(g, ff_asf_video_stream);
63 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
64 else PRINT_IF_GUID(g, ff_asf_command_stream);
65 else PRINT_IF_GUID(g, ff_asf_comment_header);
66 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
67 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
68 else PRINT_IF_GUID(g, ff_asf_data_header);
5082f759 69 else PRINT_IF_GUID(g, index_guid);
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70 else PRINT_IF_GUID(g, ff_asf_head1_guid);
71 else PRINT_IF_GUID(g, ff_asf_head2_guid);
72 else PRINT_IF_GUID(g, ff_asf_my_guid);
73 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
74 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
75 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
76 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
77 else PRINT_IF_GUID(g, ff_asf_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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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
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90static int guidcmp(const void *g1, const void *g2)
91{
b8b00d94 92 return memcmp(g1, g2, sizeof(ff_asf_guid));
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93}
94
b8b00d94 95static void get_guid(ByteIOContext *s, ff_asf_guid *g)
de6d9b64 96{
24c14d6d 97 assert(sizeof(*g) == 16);
3dc761a4 98 get_buffer(s, *g, sizeof(*g));
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99}
100
101#if 0
102static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
103{
104 int len, c;
105 char *q;
106
107 len = get_le16(pb);
108 q = buf;
109 while (len > 0) {
110 c = get_le16(pb);
111 if ((q - buf) < buf_size - 1)
112 *q++ = c;
113 len--;
114 }
115 *q = '\0';
116}
117#endif
118
119static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
120{
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121 char* q = buf;
122 len /= 2;
123 while (len--) {
124 uint8_t tmp;
125 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
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126 }
127 *q = '\0';
128}
129
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130static int asf_probe(AVProbeData *pd)
131{
c9a65ca8 132 /* check file header */
4d0c3dc0 133 if (!guidcmp(pd->buf, &ff_asf_header))
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134 return AVPROBE_SCORE_MAX;
135 else
136 return 0;
137}
138
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139static int get_value(ByteIOContext *pb, int type){
140 switch(type){
141 case 2: return get_le32(pb);
142 case 3: return get_le32(pb);
143 case 4: return get_le64(pb);
144 case 5: return get_le16(pb);
145 default:return INT_MIN;
146 }
147}
148
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149static void get_tag(AVFormatContext *s, const char *key, int type, int len)
150{
151 char value[1024];
152 if (type <= 1) { // unicode or byte
153 get_str16_nolen(s->pb, len, value, sizeof(value));
154 } else if (type <= 5) { // boolean or DWORD or QWORD or WORD
155 uint64_t num = get_value(s->pb, type);
156 snprintf(value, sizeof(value), "%"PRIu64, num);
157 } else {
158 url_fskip(s->pb, len);
159 return;
160 }
be039510 161 if (!strncmp(key, "WM/", 3))
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162 key += 3;
163 av_metadata_set(&s->metadata, key, value);
164}
165
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166static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
167{
c9a65ca8 168 ASFContext *asf = s->priv_data;
b8b00d94 169 ff_asf_guid g;
899681cd 170 ByteIOContext *pb = s->pb;
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171 AVStream *st;
172 ASFStream *asf_st;
e095026a 173 int size, i;
0c1a9eda 174 int64_t gsize;
30e88789 175 AVRational dar[128];
d8470737 176 uint32_t bitrate[128];
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177
178 memset(dar, 0, sizeof(dar));
d8470737 179 memset(bitrate, 0, sizeof(bitrate));
de6d9b64 180
de6d9b64 181 get_guid(pb, &g);
4d0c3dc0 182 if (guidcmp(&g, &ff_asf_header))
ccafd472 183 return -1;
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184 get_le64(pb);
185 get_le32(pb);
186 get_byte(pb);
187 get_byte(pb);
2141dc37 188 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
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189 for(;;) {
190 get_guid(pb, &g);
191 gsize = get_le64(pb);
f94981ea 192 dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
de6d9b64 193 print_guid(&g);
f94981ea 194 dprintf(s, " size=0x%"PRIx64"\n", gsize);
4d0c3dc0 195 if (!guidcmp(&g, &ff_asf_data_header)) {
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196 asf->data_object_offset = url_ftell(pb);
197 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
198 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
199 asf->data_object_size = gsize - 24;
200 } else {
201 asf->data_object_size = (uint64_t)-1;
202 }
203 break;
204 }
de6d9b64 205 if (gsize < 24)
ccafd472 206 return -1;
4d0c3dc0 207 if (!guidcmp(&g, &ff_asf_file_header)) {
2a10020b 208 get_guid(pb, &asf->hdr.guid);
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DB
209 asf->hdr.file_size = get_le64(pb);
210 asf->hdr.create_time = get_le64(pb);
6bb2a2df 211 asf->nb_packets = get_le64(pb);
bb270c08 212 asf->hdr.play_time = get_le64(pb);
b4bbcd63 213 asf->hdr.send_time = get_le64(pb);
bb270c08
DB
214 asf->hdr.preroll = get_le32(pb);
215 asf->hdr.ignore = get_le32(pb);
216 asf->hdr.flags = get_le32(pb);
217 asf->hdr.min_pktsize = get_le32(pb);
218 asf->hdr.max_pktsize = get_le32(pb);
219 asf->hdr.max_bitrate = get_le32(pb);
220 asf->packet_size = asf->hdr.max_pktsize;
4d0c3dc0 221 } else if (!guidcmp(&g, &ff_asf_stream_header)) {
fb65d2ca
DP
222 enum CodecType type;
223 int type_specific_size, sizeX;
7ad5455c 224 uint64_t total_size;
de6d9b64 225 unsigned int tag1;
371bf806 226 int64_t pos1, pos2, start_time;
6fea687e 227 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
2a10020b 228
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229 pos1 = url_ftell(pb);
230
247eadca 231 st = av_new_stream(s, 0);
de6d9b64 232 if (!st)
ccafd472 233 return AVERROR(ENOMEM);
9ee91c2f 234 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
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235 asf_st = av_mallocz(sizeof(ASFStream));
236 if (!asf_st)
ccafd472 237 return AVERROR(ENOMEM);
de6d9b64 238 st->priv_data = asf_st;
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239 start_time = asf->hdr.preroll;
240
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RM
241 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
242 st->duration = asf->hdr.send_time /
371bf806 243 (10000000 / 1000) - start_time;
73fe1052 244 }
de6d9b64 245 get_guid(pb, &g);
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246
247 test_for_ext_stream_audio = 0;
4d0c3dc0 248 if (!guidcmp(&g, &ff_asf_audio_stream)) {
de6d9b64 249 type = CODEC_TYPE_AUDIO;
4d0c3dc0 250 } else if (!guidcmp(&g, &ff_asf_video_stream)) {
de6d9b64 251 type = CODEC_TYPE_VIDEO;
4d0c3dc0 252 } else if (!guidcmp(&g, &ff_asf_command_stream)) {
3e86dba2 253 type = CODEC_TYPE_DATA;
4d0c3dc0 254 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
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255 test_for_ext_stream_audio = 1;
256 type = CODEC_TYPE_UNKNOWN;
de6d9b64 257 } else {
ccafd472 258 return -1;
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FB
259 }
260 get_guid(pb, &g);
261 total_size = get_le64(pb);
2e7973bb 262 type_specific_size = get_le32(pb);
de6d9b64 263 get_le32(pb);
bb270c08 264 st->id = get_le16(pb) & 0x7f; /* stream id */
2a10020b 265 // mapping of asf ID to AV stream ID;
247eadca 266 asf->asfid2avid[st->id] = s->nb_streams - 1;
2a10020b 267
de6d9b64 268 get_le32(pb);
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269
270 if (test_for_ext_stream_audio) {
271 get_guid(pb, &g);
4d0c3dc0 272 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
88141c91 273 type = CODEC_TYPE_AUDIO;
6fea687e 274 is_dvr_ms_audio=1;
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MN
275 get_guid(pb, &g);
276 get_le32(pb);
277 get_le32(pb);
278 get_le32(pb);
279 get_guid(pb, &g);
280 get_le32(pb);
281 }
282 }
283
bb270c08 284 st->codec->codec_type = type;
de6d9b64 285 if (type == CODEC_TYPE_AUDIO) {
01f4895c 286 get_wav_header(pb, st->codec, type_specific_size);
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JD
287 if (is_dvr_ms_audio) {
288 // codec_id and codec_tag are unreliable in dvr_ms
289 // files. Set them later by probing stream.
0bef08e5 290 st->codec->codec_id = CODEC_ID_PROBE;
6fea687e
JD
291 st->codec->codec_tag = 0;
292 }
e7f73adb
AC
293 if (st->codec->codec_id == CODEC_ID_AAC) {
294 st->need_parsing = AVSTREAM_PARSE_NONE;
295 } else {
e9259f8d 296 st->need_parsing = AVSTREAM_PARSE_FULL;
e7f73adb 297 }
bb270c08
DB
298 /* We have to init the frame size at some point .... */
299 pos2 = url_ftell(pb);
b9c6d01b 300 if (gsize >= (pos2 + 8 - pos1 + 24)) {
bb270c08
DB
301 asf_st->ds_span = get_byte(pb);
302 asf_st->ds_packet_size = get_le16(pb);
303 asf_st->ds_chunk_size = get_le16(pb);
6bb2a2df
MN
304 get_le16(pb); //ds_data_size
305 get_byte(pb); //ds_silence_data
bb270c08
DB
306 }
307 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
308 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
309 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
310 if (asf_st->ds_span > 1) {
311 if (!asf_st->ds_chunk_size
05219463
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312 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
313 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
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DB
314 asf_st->ds_span = 0; // disable descrambling
315 }
01f4895c 316 switch (st->codec->codec_id) {
80783dc2 317 case CODEC_ID_MP3:
01f4895c 318 st->codec->frame_size = MPA_FRAME_SIZE;
f80c1ac0
PG
319 break;
320 case CODEC_ID_PCM_S16LE:
321 case CODEC_ID_PCM_S16BE:
322 case CODEC_ID_PCM_U16LE:
323 case CODEC_ID_PCM_U16BE:
324 case CODEC_ID_PCM_S8:
325 case CODEC_ID_PCM_U8:
326 case CODEC_ID_PCM_ALAW:
327 case CODEC_ID_PCM_MULAW:
01f4895c 328 st->codec->frame_size = 1;
f80c1ac0
PG
329 break;
330 default:
331 /* This is probably wrong, but it prevents a crash later */
01f4895c 332 st->codec->frame_size = 1;
f80c1ac0
PG
333 break;
334 }
88141c91 335 } else if (type == CODEC_TYPE_VIDEO) {
bb270c08 336 get_le32(pb);
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FB
337 get_le32(pb);
338 get_byte(pb);
339 size = get_le16(pb); /* size */
0ffd77b9 340 sizeX= get_le32(pb); /* size */
01f4895c 341 st->codec->width = get_le32(pb);
bb270c08 342 st->codec->height = get_le32(pb);
2a10020b 343 /* not available for asf */
de6d9b64 344 get_le16(pb); /* panes */
dd1c8f3e 345 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
de6d9b64 346 tag1 = get_le32(pb);
bb270c08 347 url_fskip(pb, 20);
871e62e5 348// av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
0ffd77b9 349 size= sizeX;
bb270c08
DB
350 if (size > 40) {
351 st->codec->extradata_size = size - 40;
352 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
353 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
354 }
5e29abf8 355
6d050dd6 356 /* Extract palette from extradata if bpp <= 8 */
357 /* This code assumes that extradata contains only palette */
358 /* This is true for all paletted codecs implemented in ffmpeg */
359 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
360 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
5e29abf8 361#ifdef WORDS_BIGENDIAN
6d050dd6 362 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
363 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
5e29abf8 364#else
6d050dd6 365 memcpy(st->codec->palctrl->palette, st->codec->extradata,
366 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
5e29abf8 367#endif
6d050dd6 368 st->codec->palctrl->palette_changed = 1;
369 }
5e29abf8 370
01f4895c 371 st->codec->codec_tag = tag1;
bb270c08 372 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
afbb5ce4 373 if(tag1 == MKTAG('D', 'V', 'R', ' '))
57004ff1 374 st->need_parsing = AVSTREAM_PARSE_FULL;
de6d9b64
FB
375 }
376 pos2 = url_ftell(pb);
377 url_fskip(pb, gsize - (pos2 - pos1 + 24));
4d0c3dc0 378 } else if (!guidcmp(&g, &ff_asf_comment_header)) {
de6d9b64
FB
379 int len1, len2, len3, len4, len5;
380
381 len1 = get_le16(pb);
382 len2 = get_le16(pb);
383 len3 = get_le16(pb);
384 len4 = get_le16(pb);
385 len5 = get_le16(pb);
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AJ
386 get_tag(s, "title" , 0, len1);
387 get_tag(s, "author" , 0, len2);
388 get_tag(s, "copyright", 0, len3);
389 get_tag(s, "comment" , 0, len4);
bb270c08 390 url_fskip(pb, len5);
4d0c3dc0 391 } else if (!guidcmp(&g, &stream_bitrate_guid)) {
0e3b6a6f
RM
392 int stream_count = get_le16(pb);
393 int j;
394
871e62e5
BF
395// av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
396// av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
0e3b6a6f
RM
397 for(j = 0; j < stream_count; j++) {
398 int flags, bitrate, stream_id;
399
400 flags= get_le16(pb);
401 bitrate= get_le32(pb);
402 stream_id= (flags & 0x7f);
871e62e5 403// av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
a9054d91 404 asf->stream_bitrates[stream_id]= bitrate;
0e3b6a6f 405 }
4d0c3dc0 406 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
6d050dd6 407 int desc_count, i;
408
409 desc_count = get_le16(pb);
410 for(i=0;i<desc_count;i++) {
411 int name_len,value_type,value_len;
412 char name[1024];
413
414 name_len = get_le16(pb);
415 get_str16_nolen(pb, name_len, name, sizeof(name));
416 value_type = get_le16(pb);
417 value_len = get_le16(pb);
418 get_tag(s, name, value_type, value_len);
419 }
4d0c3dc0 420 } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
30e88789
MN
421 int n, stream_num, name_len, value_len, value_type, value_num;
422 n = get_le16(pb);
423
424 for(i=0;i<n;i++) {
425 char name[1024];
426
427 get_le16(pb); //lang_list_index
428 stream_num= get_le16(pb);
429 name_len= get_le16(pb);
430 value_type= get_le16(pb);
431 value_len= get_le32(pb);
432
433 get_str16_nolen(pb, name_len, name, sizeof(name));
871e62e5 434//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
755bfeab 435 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
436 url_fskip(pb, value_len - 2);
437
438 if(stream_num<128){
439 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
440 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
441 }
442 }
4d0c3dc0 443 } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
88141c91 444 int ext_len, payload_ext_ct, stream_ct;
d8470737 445 uint32_t ext_d, leak_rate, stream_num;
1bd86246 446 int64_t pos_ex_st;
88141c91
MN
447 pos_ex_st = url_ftell(pb);
448
de3ae959
MN
449 get_le64(pb); // starttime
450 get_le64(pb); // endtime
d8470737 451 leak_rate = get_le32(pb); // leak-datarate
de3ae959
MN
452 get_le32(pb); // bucket-datasize
453 get_le32(pb); // init-bucket-fullness
454 get_le32(pb); // alt-leak-datarate
455 get_le32(pb); // alt-bucket-datasize
456 get_le32(pb); // alt-init-bucket-fullness
457 get_le32(pb); // max-object-size
458 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
d8470737 459 stream_num = get_le16(pb); // stream-num
de3ae959
MN
460 get_le16(pb); // stream-language-id-index
461 get_le64(pb); // avg frametime in 100ns units
462 stream_ct = get_le16(pb); //stream-name-count
463 payload_ext_ct = get_le16(pb); //payload-extension-system-count
88141c91 464
d8470737
ZM
465 if (stream_num < 128)
466 bitrate[stream_num] = leak_rate;
467
88141c91
MN
468 for (i=0; i<stream_ct; i++){
469 get_le16(pb);
470 ext_len = get_le16(pb);
471 url_fseek(pb, ext_len, SEEK_CUR);
472 }
473
474 for (i=0; i<payload_ext_ct; i++){
475 get_guid(pb, &g);
476 ext_d=get_le16(pb);
477 ext_len=get_le32(pb);
478 url_fseek(pb, ext_len, SEEK_CUR);
479 }
480
481 // there could be a optional stream properties object to follow
482 // if so the next iteration will pick it up
4d0c3dc0 483 } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
de6d9b64
FB
484 int v1, v2;
485 get_guid(pb, &g);
486 v1 = get_le32(pb);
487 v2 = get_le16(pb);
88141c91 488#if 0
4d0c3dc0 489 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
de6d9b64
FB
490 int len, v1, n, num;
491 char str[256], *q;
492 char tag[16];
493
494 get_guid(pb, &g);
495 print_guid(&g);
2a10020b 496
de6d9b64
FB
497 n = get_le32(pb);
498 for(i=0;i<n;i++) {
499 num = get_le16(pb); /* stream number */
500 get_str16(pb, str, sizeof(str));
501 get_str16(pb, str, sizeof(str));
502 len = get_le16(pb);
503 q = tag;
504 while (len > 0) {
505 v1 = get_byte(pb);
506 if ((q - tag) < sizeof(tag) - 1)
507 *q++ = v1;
508 len--;
509 }
510 *q = '\0';
511 }
512#endif
513 } else if (url_feof(pb)) {
ccafd472 514 return -1;
de6d9b64
FB
515 } else {
516 url_fseek(pb, gsize - 24, SEEK_CUR);
517 }
518 }
519 get_guid(pb, &g);
520 get_le64(pb);
521 get_byte(pb);
522 get_byte(pb);
2141dc37 523 if (url_feof(pb))
ccafd472 524 return -1;
2141dc37 525 asf->data_offset = url_ftell(pb);
de6d9b64
FB
526 asf->packet_size_left = 0;
527
30e88789
MN
528
529 for(i=0; i<128; i++){
530 int stream_num= asf->asfid2avid[i];
d8470737 531 if(stream_num>=0){
59729451
AJ
532 AVStream *st = s->streams[stream_num];
533 if (!st->codec->bit_rate)
534 st->codec->bit_rate = bitrate[i];
d8470737 535 if (dar[i].num > 0 && dar[i].den > 0)
59729451
AJ
536 av_reduce(&st->sample_aspect_ratio.num,
537 &st->sample_aspect_ratio.den,
18d915dd 538 dar[i].num, dar[i].den, INT_MAX);
871e62e5 539//av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
30e88789
MN
540 }
541 }
542
de6d9b64 543 return 0;
de6d9b64
FB
544}
545
2a10020b
ZK
546#define DO_2BITS(bits, var, defval) \
547 switch (bits & 3) \
548 { \
549 case 3: var = get_le32(pb); rsize += 4; break; \
550 case 2: var = get_le16(pb); rsize += 2; break; \
551 case 1: var = get_byte(pb); rsize++; break; \
552 default: var = defval; break; \
553 }
554
1d217cdb 555int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
de6d9b64
FB
556{
557 ASFContext *asf = s->priv_data;
2a10020b 558 uint32_t packet_length, padsize;
0c0d17f3 559 int rsize = 8;
0fd9e6f3
MN
560 int c, d, e, off;
561
022f0b7c 562 off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
0fd9e6f3
MN
563
564 c=d=e=-1;
565 while(off-- > 0){
566 c=d; d=e;
567 e= get_byte(pb);
568 if(c == 0x82 && !d && !e)
569 break;
570 }
115329f1 571
1359c2d4 572 if (c != 0x82) {
5acdd6e6 573 if (!url_feof(pb))
bb270c08 574 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
2a10020b 575 }
0c0d17f3 576 if ((c & 0x8f) == 0x82) {
0fd9e6f3 577 if (d || e) {
5acdd6e6 578 if (!url_feof(pb))
bb270c08 579 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
f7835507 580 return -1;
bb270c08 581 }
0c0d17f3 582 c= get_byte(pb);
0fd9e6f3 583 d= get_byte(pb);
0c0d17f3
MN
584 rsize+=3;
585 }else{
586 url_fseek(pb, -1, SEEK_CUR); //FIXME
de6d9b64 587 }
2a10020b 588
0c0d17f3
MN
589 asf->packet_flags = c;
590 asf->packet_property = d;
2a10020b
ZK
591
592 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
593 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
594 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
595
5b11e081
MN
596 //the following checks prevent overflows and infinite loops
597 if(packet_length >= (1U<<29)){
598 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
ceba96cb 599 return -1;
5b11e081 600 }
92216453 601 if(padsize >= packet_length){
5b11e081 602 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
ceba96cb 603 return -1;
5b11e081
MN
604 }
605
2a10020b 606 asf->packet_timestamp = get_le32(pb);
de6d9b64 607 get_le16(pb); /* duration */
2141dc37 608 // rsize has at least 11 bytes which have to be present
2a10020b
ZK
609
610 if (asf->packet_flags & 0x01) {
bb270c08 611 asf->packet_segsizetype = get_byte(pb); rsize++;
2a10020b
ZK
612 asf->packet_segments = asf->packet_segsizetype & 0x3f;
613 } else {
bb270c08 614 asf->packet_segments = 1;
2a10020b
ZK
615 asf->packet_segsizetype = 0x80;
616 }
617 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK
618 if (packet_length < asf->hdr.min_pktsize)
619 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 620 asf->packet_padsize = padsize;
f94981ea 621 dprintf(s, "packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64
FB
622 return 0;
623}
624
ae60a857
MN
625/**
626 *
627 * @return <0 if error
628 */
d7fb5a18 629static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
ae60a857 630 ASFContext *asf = s->priv_data;
ae60a857
MN
631 int rsize = 1;
632 int num = get_byte(pb);
559a55ad 633 int64_t ts0, ts1;
ae60a857
MN
634
635 asf->packet_segments--;
636 asf->packet_key_frame = num >> 7;
637 asf->stream_index = asf->asfid2avid[num & 0x7f];
638 // sequence should be ignored!
639 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
640 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
641 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
642//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);
643 if (asf->packet_replic_size >= 8) {
644 asf->packet_obj_size = get_le32(pb);
645 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
646 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
647 return -1;
648 }
649 asf->packet_frag_timestamp = get_le32(pb); // timestamp
559a55ad
MN
650 if(asf->packet_replic_size >= 8+38+4){
651// for(i=0; i<asf->packet_replic_size-8; i++)
652// av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
653// av_log(s, AV_LOG_DEBUG, "\n");
654 url_fskip(pb, 10);
655 ts0= get_le64(pb);
656 ts1= get_le64(pb);
657 url_fskip(pb, 12);
658 get_le32(pb);
659 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
660 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
661 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
662 }else
663 url_fskip(pb, asf->packet_replic_size - 8);
ae60a857
MN
664 rsize += asf->packet_replic_size; // FIXME - check validity
665 } else if (asf->packet_replic_size==1){
efc90ebf 666 // multipacket - frag_offset is beginning timestamp
ae60a857
MN
667 asf->packet_time_start = asf->packet_frag_offset;
668 asf->packet_frag_offset = 0;
669 asf->packet_frag_timestamp = asf->packet_timestamp;
670
671 asf->packet_time_delta = get_byte(pb);
672 rsize++;
673 }else if(asf->packet_replic_size!=0){
674 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
675 return -1;
676 }
677 if (asf->packet_flags & 0x01) {
678 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
13f7e4b9
MN
679 if(asf->packet_frag_size > asf->packet_size_left - rsize){
680 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
681 return -1;
682 }
ae60a857
MN
683 //printf("Fragsize %d\n", asf->packet_frag_size);
684 } else {
685 asf->packet_frag_size = asf->packet_size_left - rsize;
686 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
687 }
688 if (asf->packet_replic_size == 1) {
689 asf->packet_multi_size = asf->packet_frag_size;
690 if (asf->packet_multi_size > asf->packet_size_left)
691 return -1;
692 }
693 asf->packet_size_left -= rsize;
694 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
695
696 return 0;
697}
698
1d217cdb 699int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
de6d9b64
FB
700{
701 ASFContext *asf = s->priv_data;
2a10020b 702 ASFStream *asf_st = 0;
2a10020b 703 for (;;) {
ceba96cb 704 if(url_feof(pb))
6f3e0b21 705 return AVERROR(EIO);
bb270c08
DB
706 if (asf->packet_size_left < FRAME_HEADER_SIZE
707 || asf->packet_segments < 1) {
708 //asf->packet_size_left <= asf->packet_padsize) {
709 int ret = asf->packet_size_left + asf->packet_padsize;
949b1a13 710 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
5b11e081 711 assert(ret>=0);
bb270c08
DB
712 /* fail safe */
713 url_fskip(pb, ret);
b04d5d31 714
022f0b7c 715 asf->packet_pos= url_ftell(pb);
b6eaae39
KED
716 if (asf->data_object_size != (uint64_t)-1 &&
717 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
6f3e0b21 718 return AVERROR(EIO); /* Do not exceed the size of the data object */
f27544fd 719 return 1;
bb270c08
DB
720 }
721 if (asf->packet_time_start == 0) {
b0d75d60 722 if(asf_read_frame_header(s, pb) < 0){
ae60a857 723 asf->packet_segments= 0;
236116cb 724 continue;
1305a9d5 725 }
bb270c08 726 if (asf->stream_index < 0
f3356e9c
MN
727 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
728 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
729 ) {
1359c2d4 730 asf->packet_time_start = 0;
bb270c08
DB
731 /* unhandled packet (should not happen) */
732 url_fskip(pb, asf->packet_frag_size);
733 asf->packet_size_left -= asf->packet_frag_size;
b9866ebc 734 if(asf->stream_index < 0)
ae60a857 735 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1359c2d4 736 continue;
bb270c08
DB
737 }
738 asf->asf_st = s->streams[asf->stream_index]->priv_data;
739 }
740 asf_st = asf->asf_st;
741
bb270c08 742 if (asf->packet_replic_size == 1) {
efc90ebf 743 // frag_offset is here used as the beginning timestamp
bb270c08
DB
744 asf->packet_frag_timestamp = asf->packet_time_start;
745 asf->packet_time_start += asf->packet_time_delta;
746 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
747 asf->packet_size_left--;
2141dc37 748 asf->packet_multi_size--;
bb270c08
DB
749 if (asf->packet_multi_size < asf->packet_obj_size)
750 {
751 asf->packet_time_start = 0;
752 url_fskip(pb, asf->packet_multi_size);
753 asf->packet_size_left -= asf->packet_multi_size;
2141dc37 754 continue;
bb270c08
DB
755 }
756 asf->packet_multi_size -= asf->packet_obj_size;
757 //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);
758 }
60ff1c44
MN
759 if( /*asf->packet_frag_size == asf->packet_obj_size*/
760 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
761 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
762 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
763 asf_st->frag_offset, asf->packet_frag_size,
764 asf->packet_obj_size, asf_st->pkt.size);
765 asf->packet_obj_size= asf_st->pkt.size;
766 }
767
f8f0a0bd
MN
768 if ( asf_st->pkt.size != asf->packet_obj_size
769 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
200026aa
MN
770 if(asf_st->pkt.data){
771 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
772 asf_st->frag_offset = 0;
773 av_free_packet(&asf_st->pkt);
774 }
bb270c08
DB
775 /* new packet */
776 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
777 asf_st->seq = asf->packet_seq;
eb63b051 778 asf_st->pkt.dts = asf->packet_frag_timestamp;
bb270c08 779 asf_st->pkt.stream_index = asf->stream_index;
115329f1
DB
780 asf_st->pkt.pos =
781 asf_st->packet_pos= asf->packet_pos;
782//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
82b9e4a2 783//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
01f4895c 784//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
bb270c08
DB
785 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
786 asf->packet_key_frame = 1;
787 if (asf->packet_key_frame)
788 asf_st->pkt.flags |= PKT_FLAG_KEY;
789 }
790
791 /* read data */
792 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
793 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
794 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
795 asf->packet_size_left -= asf->packet_frag_size;
796 if (asf->packet_size_left < 0)
2141dc37 797 continue;
4c71d727
MN
798
799 if( asf->packet_frag_offset >= asf_st->pkt.size
800 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
801 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
802 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
803 continue;
804 }
805
bb270c08
DB
806 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
807 asf->packet_frag_size);
72be7db4
RD
808 if (s->key && s->keylen == 20)
809 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
810 asf->packet_frag_size);
bb270c08
DB
811 asf_st->frag_offset += asf->packet_frag_size;
812 /* test if whole packet is read */
813 if (asf_st->frag_offset == asf_st->pkt.size) {
da0b94f5
MN
814 //workaround for macroshit radio DVR-MS files
815 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
816 && asf_st->pkt.size > 100){
817 int i;
818 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
819 if(i == asf_st->pkt.size){
820 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
821 asf_st->frag_offset = 0;
822 av_free_packet(&asf_st->pkt);
823 continue;
824 }
825 }
826
bb270c08
DB
827 /* return packet */
828 if (asf_st->ds_span > 1) {
05219463 829 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
b43387d4 830 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 831 }else{
bb270c08 832 /* packet descrambling */
191e8ca7 833 uint8_t *newdata = av_malloc(asf_st->pkt.size);
bb270c08
DB
834 if (newdata) {
835 int offset = 0;
836 while (offset < asf_st->pkt.size) {
837 int off = offset / asf_st->ds_chunk_size;
838 int row = off / asf_st->ds_span;
839 int col = off % asf_st->ds_span;
840 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
841 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
05219463
MN
842
843 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
844 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
bb270c08
DB
845 memcpy(newdata + offset,
846 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
847 asf_st->ds_chunk_size);
848 offset += asf_st->ds_chunk_size;
849 }
850 av_free(asf_st->pkt.data);
851 asf_st->pkt.data = newdata;
852 }
05219463 853 }
bb270c08
DB
854 }
855 asf_st->frag_offset = 0;
b83e83b9 856 *pkt= asf_st->pkt;
bb270c08
DB
857 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
858 asf_st->pkt.size = 0;
859 asf_st->pkt.data = 0;
860 break; // packet completed
861 }
de6d9b64 862 }
de6d9b64
FB
863 return 0;
864}
865
f27544fd
RB
866static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
867{
868 ASFContext *asf = s->priv_data;
869
870 for (;;) {
871 int ret;
872
873 /* parse cached packets, if any */
1d217cdb 874 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
f27544fd 875 return ret;
1d217cdb 876 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
f27544fd
RB
877 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
878 asf->packet_time_start = 0;
879 }
880
881 return 0;
882}
883
38376f00
KK
884// Added to support seeking after packets have been read
885// If information is not reset, read_packet fails due to
886// leftover information from previous reads
887static void asf_reset_header(AVFormatContext *s)
888{
889 ASFContext *asf = s->priv_data;
82b9e4a2
MN
890 ASFStream *asf_st;
891 int i;
38376f00
KK
892
893 asf->packet_nb_frames = 0;
38376f00
KK
894 asf->packet_size_left = 0;
895 asf->packet_segments = 0;
896 asf->packet_flags = 0;
897 asf->packet_property = 0;
898 asf->packet_timestamp = 0;
899 asf->packet_segsizetype = 0;
900 asf->packet_segments = 0;
901 asf->packet_seq = 0;
902 asf->packet_replic_size = 0;
903 asf->packet_key_frame = 0;
904 asf->packet_padsize = 0;
905 asf->packet_frag_offset = 0;
906 asf->packet_frag_size = 0;
907 asf->packet_frag_timestamp = 0;
908 asf->packet_multi_size = 0;
909 asf->packet_obj_size = 0;
910 asf->packet_time_delta = 0;
911 asf->packet_time_start = 0;
115329f1 912
82b9e4a2
MN
913 for(i=0; i<s->nb_streams; i++){
914 asf_st= s->streams[i]->priv_data;
915 av_free_packet(&asf_st->pkt);
916 asf_st->frag_offset=0;
917 asf_st->seq=0;
918 }
919 asf->asf_st= NULL;
38376f00
KK
920}
921
5d25d2a9
DB
922static int asf_read_close(AVFormatContext *s)
923{
924 int i;
925
926 asf_reset_header(s);
927 for(i=0;i<s->nb_streams;i++) {
928 AVStream *st = s->streams[i];
5d25d2a9
DB
929 av_free(st->codec->palctrl);
930 }
931 return 0;
932}
933
8d14a25c 934static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
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935{
936 ASFContext *asf = s->priv_data;
937 AVPacket pkt1, *pkt = &pkt1;
82b9e4a2 938 ASFStream *asf_st;
580fb5e7 939 int64_t pts;
82b9e4a2 940 int64_t pos= *ppos;
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941 int i;
942 int64_t start_pos[s->nb_streams];
115329f1 943
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944 for(i=0; i<s->nb_streams; i++){
945 start_pos[i]= pos;
946 }
115329f1 947
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948 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
949 *ppos= pos;
899681cd 950 url_fseek(s->pb, pos, SEEK_SET);
115329f1 951
82b9e4a2 952//printf("asf_read_pts\n");
82b9e4a2 953 asf_reset_header(s);
3e9245a9 954 for(;;){
82b9e4a2 955 if (av_read_frame(s, pkt) < 0){
0b93103a 956 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
bb270c08 957 return AV_NOPTS_VALUE;
82b9e4a2 958 }
115329f1 959
38cf2a72 960 pts= pkt->pts;
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961
962 av_free_packet(pkt);
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963 if(pkt->flags&PKT_FLAG_KEY){
964 i= pkt->stream_index;
965
966 asf_st= s->streams[i]->priv_data;
967
0fd9e6f3 968// assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
8d14a25c 969 pos= asf_st->packet_pos;
09646bab 970
52e54612 971 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
8d14a25c 972 start_pos[i]= asf_st->packet_pos + 1;
115329f1 973
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974 if(pkt->stream_index == stream_index)
975 break;
976 }
977 }
978
979 *ppos= pos;
949b1a13 980//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
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981
982 return pts;
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983}
984
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985static void asf_build_simple_index(AVFormatContext *s, int stream_index)
986{
b8b00d94 987 ff_asf_guid g;
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988 ASFContext *asf = s->priv_data;
989 int64_t gsize, itime;
990 int64_t pos, current_pos, index_pts;
991 int i;
992 int pct,ict;
993
899681cd 994 current_pos = url_ftell(s->pb);
56c96a22 995
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996 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
997 get_guid(s->pb, &g);
4d0c3dc0 998 if (!guidcmp(&g, &index_guid)) {
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999 gsize = get_le64(s->pb);
1000 get_guid(s->pb, &g);
1001 itime=get_le64(s->pb);
1002 pct=get_le32(s->pb);
1003 ict=get_le32(s->pb);
871e62e5 1004 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
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1005
1006 for (i=0;i<ict;i++){
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1007 int pktnum=get_le32(s->pb);
1008 int pktct =get_le16(s->pb);
871e62e5 1009 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
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1010
1011 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1012 index_pts=av_rescale(itime, i, 10000);
1013
1014 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1015 }
52e54612 1016 asf->index_read= 1;
56c96a22 1017 }
899681cd 1018 url_fseek(s->pb, current_pos, SEEK_SET);
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1019}
1020
3ba1438d 1021static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
2a10020b 1022{
afda223c 1023 ASFContext *asf = s->priv_data;
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1024 AVStream *st = s->streams[stream_index];
1025 int64_t pos;
1026 int index;
115329f1 1027
a602556e 1028 if (asf->packet_size <= 0)
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1029 return -1;
1030
fa13095a 1031 /* Try using the protocol's read_seek if available */
fd2982a0 1032 if(s->pb) {
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1033 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1034 if(ret >= 0)
1035 asf_reset_header(s);
fd2982a0 1036 if (ret != AVERROR(ENOSYS))
cd31f8dc 1037 return ret;
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1038 }
1039
52e54612 1040 if (!asf->index_read)
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1041 asf_build_simple_index(s, stream_index);
1042
52e54612 1043 if(!(asf->index_read && st->index_entries)){
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1044 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1045 return -1;
1046 }else{
1047 index= av_index_search_timestamp(st, pts, flags);
1048 if(index<0)
1049 return -1;
1050
1051 /* find the position */
1052 pos = st->index_entries[index].pos;
1053 pts = st->index_entries[index].timestamp;
1054
1055 // various attempts to find key frame have failed so far
1056 // asf_reset_header(s);
899681cd 1057 // url_fseek(s->pb, pos, SEEK_SET);
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1058 // key_pos = pos;
1059 // for(i=0;i<16;i++){
899681cd 1060 // pos = url_ftell(s->pb);
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1061 // if (av_read_frame(s, &pkt) < 0){
1062 // av_log(s, AV_LOG_INFO, "seek failed\n");
1063 // return -1;
1064 // }
1065 // asf_st = s->streams[stream_index]->priv_data;
1066 // pos += st->parser->frame_offset;
1067 //
1068 // if (pkt.size > b) {
1069 // b = pkt.size;
1070 // key_pos = pos;
1071 // }
1072 //
1073 // av_free_packet(&pkt);
1074 // }
1075
1076 /* do the seek */
871e62e5 1077 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
899681cd 1078 url_fseek(s->pb, pos, SEEK_SET);
56c96a22 1079 }
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1080 asf_reset_header(s);
1081 return 0;
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1082}
1083
ff70e601 1084AVInputFormat asf_demuxer = {
c9a65ca8 1085 "asf",
bde15e74 1086 NULL_IF_CONFIG_SMALL("ASF format"),
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FB
1087 sizeof(ASFContext),
1088 asf_probe,
1089 asf_read_header,
1090 asf_read_packet,
1091 asf_read_close,
2a10020b 1092 asf_read_seek,
8d14a25c 1093 asf_read_pts,
719e721a 1094 .metadata_conv = ff_asf_metadata_conv,
c9a65ca8 1095};