57e8fb6df441a74278791ecdd00371faa6353107
[libav.git] / libavformat / asfdec.c
1 /*
2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 //#define DEBUG
23
24 #include "libavutil/common.h"
25 #include "libavutil/avstring.h"
26 #include "libavcodec/mpegaudio.h"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "riff.h"
30 #include "asf.h"
31 #include "asfcrypt.h"
32 #include "avlanguage.h"
33
34 typedef struct {
35 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
36 ASFStream streams[128]; ///< it's max number and it's not that big
37 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
38 AVRational dar[128];
39 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
40 /* non streamed additonnal info */
41 /* packet filling */
42 int packet_size_left;
43 /* only for reading */
44 uint64_t data_offset; ///< beginning of the first data packet
45 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
46 uint64_t data_object_size; ///< size of the data object
47 int index_read;
48
49 ASFMainHeader hdr;
50
51 int packet_flags;
52 int packet_property;
53 int packet_timestamp;
54 int packet_segsizetype;
55 int packet_segments;
56 int packet_seq;
57 int packet_replic_size;
58 int packet_key_frame;
59 int packet_padsize;
60 unsigned int packet_frag_offset;
61 unsigned int packet_frag_size;
62 int64_t packet_frag_timestamp;
63 int packet_multi_size;
64 int packet_obj_size;
65 int packet_time_delta;
66 int packet_time_start;
67 int64_t packet_pos;
68
69 int stream_index;
70
71 ASFStream* asf_st; ///< currently decoded stream
72 } ASFContext;
73
74 #undef NDEBUG
75 #include <assert.h>
76
77 #define ASF_MAX_STREAMS 127
78 #define FRAME_HEADER_SIZE 17
79 // Fix Me! FRAME_HEADER_SIZE may be different.
80
81 static const ff_asf_guid index_guid = {
82 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
83 };
84
85 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
86 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
87 };
88 /**********************************/
89 /* decoding */
90
91 #ifdef DEBUG
92 #define PRINT_IF_GUID(g,cmp) \
93 if (!ff_guidcmp(g, &cmp)) \
94 av_dlog(NULL, "(GUID: %s) ", #cmp)
95
96 static void print_guid(const ff_asf_guid *g)
97 {
98 int i;
99 PRINT_IF_GUID(g, ff_asf_header);
100 else PRINT_IF_GUID(g, ff_asf_file_header);
101 else PRINT_IF_GUID(g, ff_asf_stream_header);
102 else PRINT_IF_GUID(g, ff_asf_audio_stream);
103 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
104 else PRINT_IF_GUID(g, ff_asf_video_stream);
105 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
106 else PRINT_IF_GUID(g, ff_asf_command_stream);
107 else PRINT_IF_GUID(g, ff_asf_comment_header);
108 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
109 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
110 else PRINT_IF_GUID(g, ff_asf_data_header);
111 else PRINT_IF_GUID(g, index_guid);
112 else PRINT_IF_GUID(g, ff_asf_head1_guid);
113 else PRINT_IF_GUID(g, ff_asf_head2_guid);
114 else PRINT_IF_GUID(g, ff_asf_my_guid);
115 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
116 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
117 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
118 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
119 else PRINT_IF_GUID(g, ff_asf_metadata_header);
120 else PRINT_IF_GUID(g, ff_asf_marker_header);
121 else PRINT_IF_GUID(g, stream_bitrate_guid);
122 else PRINT_IF_GUID(g, ff_asf_language_guid);
123 else
124 av_dlog(NULL, "(GUID: unknown) ");
125 for(i=0;i<16;i++)
126 av_dlog(NULL, " 0x%02x,", (*g)[i]);
127 av_dlog(NULL, "}\n");
128 }
129 #undef PRINT_IF_GUID
130 #else
131 #define print_guid(g)
132 #endif
133
134 void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
135 {
136 assert(sizeof(*g) == 16);
137 avio_read(s, *g, sizeof(*g));
138 }
139
140 static int asf_probe(AVProbeData *pd)
141 {
142 /* check file header */
143 if (!ff_guidcmp(pd->buf, &ff_asf_header))
144 return AVPROBE_SCORE_MAX;
145 else
146 return 0;
147 }
148
149 static int get_value(AVIOContext *pb, int type){
150 switch(type){
151 case 2: return avio_rl32(pb);
152 case 3: return avio_rl32(pb);
153 case 4: return avio_rl64(pb);
154 case 5: return avio_rl16(pb);
155 default:return INT_MIN;
156 }
157 }
158
159 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
160 {
161 char *value;
162 int64_t off = avio_tell(s->pb);
163
164 if ((unsigned)len >= (UINT_MAX - 1)/2)
165 return;
166
167 value = av_malloc(2*len+1);
168 if (!value)
169 goto finish;
170
171 if (type == 0) { // UTF16-LE
172 avio_get_str16le(s->pb, len, value, 2*len + 1);
173 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
174 uint64_t num = get_value(s->pb, type);
175 snprintf(value, len, "%"PRIu64, num);
176 } else {
177 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
178 goto finish;
179 }
180 if (*value)
181 av_metadata_set2(&s->metadata, key, value, 0);
182 finish:
183 av_freep(&value);
184 avio_seek(s->pb, off + len, SEEK_SET);
185 }
186
187 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
188 {
189 ASFContext *asf = s->priv_data;
190 AVIOContext *pb = s->pb;
191
192 ff_get_guid(pb, &asf->hdr.guid);
193 asf->hdr.file_size = avio_rl64(pb);
194 asf->hdr.create_time = avio_rl64(pb);
195 avio_rl64(pb); /* number of packets */
196 asf->hdr.play_time = avio_rl64(pb);
197 asf->hdr.send_time = avio_rl64(pb);
198 asf->hdr.preroll = avio_rl32(pb);
199 asf->hdr.ignore = avio_rl32(pb);
200 asf->hdr.flags = avio_rl32(pb);
201 asf->hdr.min_pktsize = avio_rl32(pb);
202 asf->hdr.max_pktsize = avio_rl32(pb);
203 asf->hdr.max_bitrate = avio_rl32(pb);
204 s->packet_size = asf->hdr.max_pktsize;
205
206 return 0;
207 }
208
209 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
210 {
211 ASFContext *asf = s->priv_data;
212 AVIOContext *pb = s->pb;
213 AVStream *st;
214 ASFStream *asf_st;
215 ff_asf_guid g;
216 enum AVMediaType type;
217 int type_specific_size, sizeX;
218 uint64_t total_size;
219 unsigned int tag1;
220 int64_t pos1, pos2, start_time;
221 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
222
223 if (s->nb_streams == ASF_MAX_STREAMS) {
224 av_log(s, AV_LOG_ERROR, "too many streams\n");
225 return AVERROR(EINVAL);
226 }
227
228 pos1 = avio_tell(pb);
229
230 st = av_new_stream(s, 0);
231 if (!st)
232 return AVERROR(ENOMEM);
233 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
234 asf_st = av_mallocz(sizeof(ASFStream));
235 if (!asf_st)
236 return AVERROR(ENOMEM);
237 st->priv_data = asf_st;
238 st->start_time = 0;
239 start_time = asf->hdr.preroll;
240
241 asf_st->stream_language_index = 128; // invalid stream index means no language info
242
243 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
244 st->duration = asf->hdr.play_time /
245 (10000000 / 1000) - start_time;
246 }
247 ff_get_guid(pb, &g);
248
249 test_for_ext_stream_audio = 0;
250 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
251 type = AVMEDIA_TYPE_AUDIO;
252 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
253 type = AVMEDIA_TYPE_VIDEO;
254 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
255 type = AVMEDIA_TYPE_VIDEO;
256 st->codec->codec_id = CODEC_ID_MJPEG;
257 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
258 type = AVMEDIA_TYPE_DATA;
259 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
260 test_for_ext_stream_audio = 1;
261 type = AVMEDIA_TYPE_UNKNOWN;
262 } else {
263 return -1;
264 }
265 ff_get_guid(pb, &g);
266 total_size = avio_rl64(pb);
267 type_specific_size = avio_rl32(pb);
268 avio_rl32(pb);
269 st->id = avio_rl16(pb) & 0x7f; /* stream id */
270 // mapping of asf ID to AV stream ID;
271 asf->asfid2avid[st->id] = s->nb_streams - 1;
272
273 avio_rl32(pb);
274
275 if (test_for_ext_stream_audio) {
276 ff_get_guid(pb, &g);
277 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
278 type = AVMEDIA_TYPE_AUDIO;
279 is_dvr_ms_audio=1;
280 ff_get_guid(pb, &g);
281 avio_rl32(pb);
282 avio_rl32(pb);
283 avio_rl32(pb);
284 ff_get_guid(pb, &g);
285 avio_rl32(pb);
286 }
287 }
288
289 st->codec->codec_type = type;
290 if (type == AVMEDIA_TYPE_AUDIO) {
291 ff_get_wav_header(pb, st->codec, type_specific_size);
292 if (is_dvr_ms_audio) {
293 // codec_id and codec_tag are unreliable in dvr_ms
294 // files. Set them later by probing stream.
295 st->codec->codec_id = CODEC_ID_PROBE;
296 st->codec->codec_tag = 0;
297 }
298 if (st->codec->codec_id == CODEC_ID_AAC) {
299 st->need_parsing = AVSTREAM_PARSE_NONE;
300 } else {
301 st->need_parsing = AVSTREAM_PARSE_FULL;
302 }
303 /* We have to init the frame size at some point .... */
304 pos2 = avio_tell(pb);
305 if (size >= (pos2 + 8 - pos1 + 24)) {
306 asf_st->ds_span = avio_r8(pb);
307 asf_st->ds_packet_size = avio_rl16(pb);
308 asf_st->ds_chunk_size = avio_rl16(pb);
309 avio_rl16(pb); //ds_data_size
310 avio_r8(pb); //ds_silence_data
311 }
312 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
313 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
314 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
315 if (asf_st->ds_span > 1) {
316 if (!asf_st->ds_chunk_size
317 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
318 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
319 asf_st->ds_span = 0; // disable descrambling
320 }
321 switch (st->codec->codec_id) {
322 case CODEC_ID_MP3:
323 st->codec->frame_size = MPA_FRAME_SIZE;
324 break;
325 case CODEC_ID_PCM_S16LE:
326 case CODEC_ID_PCM_S16BE:
327 case CODEC_ID_PCM_U16LE:
328 case CODEC_ID_PCM_U16BE:
329 case CODEC_ID_PCM_S8:
330 case CODEC_ID_PCM_U8:
331 case CODEC_ID_PCM_ALAW:
332 case CODEC_ID_PCM_MULAW:
333 st->codec->frame_size = 1;
334 break;
335 default:
336 /* This is probably wrong, but it prevents a crash later */
337 st->codec->frame_size = 1;
338 break;
339 }
340 } else if (type == AVMEDIA_TYPE_VIDEO &&
341 size - (avio_tell(pb) - pos1 + 24) >= 51) {
342 avio_rl32(pb);
343 avio_rl32(pb);
344 avio_r8(pb);
345 avio_rl16(pb); /* size */
346 sizeX= avio_rl32(pb); /* size */
347 st->codec->width = avio_rl32(pb);
348 st->codec->height = avio_rl32(pb);
349 /* not available for asf */
350 avio_rl16(pb); /* panes */
351 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
352 tag1 = avio_rl32(pb);
353 avio_skip(pb, 20);
354 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
355 if (sizeX > 40) {
356 st->codec->extradata_size = sizeX - 40;
357 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
358 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
359 }
360
361 /* Extract palette from extradata if bpp <= 8 */
362 /* This code assumes that extradata contains only palette */
363 /* This is true for all paletted codecs implemented in ffmpeg */
364 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
365 int av_unused i;
366 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
367 #if HAVE_BIGENDIAN
368 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
369 st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
370 #else
371 memcpy(st->codec->palctrl->palette, st->codec->extradata,
372 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
373 #endif
374 st->codec->palctrl->palette_changed = 1;
375 }
376
377 st->codec->codec_tag = tag1;
378 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
379 if(tag1 == MKTAG('D', 'V', 'R', ' ')){
380 st->need_parsing = AVSTREAM_PARSE_FULL;
381 // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
382 st->codec->width =
383 st->codec->height = 0;
384 av_freep(&st->codec->extradata);
385 st->codec->extradata_size=0;
386 }
387 if(st->codec->codec_id == CODEC_ID_H264)
388 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
389 }
390 pos2 = avio_tell(pb);
391 avio_skip(pb, size - (pos2 - pos1 + 24));
392
393 return 0;
394 }
395
396 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
397 {
398 ASFContext *asf = s->priv_data;
399 AVIOContext *pb = s->pb;
400 ff_asf_guid g;
401 int ext_len, payload_ext_ct, stream_ct, i;
402 uint32_t ext_d, leak_rate, stream_num;
403 unsigned int stream_languageid_index;
404
405 avio_rl64(pb); // starttime
406 avio_rl64(pb); // endtime
407 leak_rate = avio_rl32(pb); // leak-datarate
408 avio_rl32(pb); // bucket-datasize
409 avio_rl32(pb); // init-bucket-fullness
410 avio_rl32(pb); // alt-leak-datarate
411 avio_rl32(pb); // alt-bucket-datasize
412 avio_rl32(pb); // alt-init-bucket-fullness
413 avio_rl32(pb); // max-object-size
414 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
415 stream_num = avio_rl16(pb); // stream-num
416
417 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
418 if (stream_num < 128)
419 asf->streams[stream_num].stream_language_index = stream_languageid_index;
420
421 avio_rl64(pb); // avg frametime in 100ns units
422 stream_ct = avio_rl16(pb); //stream-name-count
423 payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
424
425 if (stream_num < 128)
426 asf->stream_bitrates[stream_num] = leak_rate;
427
428 for (i=0; i<stream_ct; i++){
429 avio_rl16(pb);
430 ext_len = avio_rl16(pb);
431 avio_skip(pb, ext_len);
432 }
433
434 for (i=0; i<payload_ext_ct; i++){
435 ff_get_guid(pb, &g);
436 ext_d=avio_rl16(pb);
437 ext_len=avio_rl32(pb);
438 avio_skip(pb, ext_len);
439 }
440
441 return 0;
442 }
443
444 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
445 {
446 AVIOContext *pb = s->pb;
447 int len1, len2, len3, len4, len5;
448
449 len1 = avio_rl16(pb);
450 len2 = avio_rl16(pb);
451 len3 = avio_rl16(pb);
452 len4 = avio_rl16(pb);
453 len5 = avio_rl16(pb);
454 get_tag(s, "title" , 0, len1);
455 get_tag(s, "author" , 0, len2);
456 get_tag(s, "copyright", 0, len3);
457 get_tag(s, "comment" , 0, len4);
458 avio_skip(pb, len5);
459
460 return 0;
461 }
462
463 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
464 {
465 AVIOContext *pb = s->pb;
466 ASFContext *asf = s->priv_data;
467 int desc_count, i, ret;
468
469 desc_count = avio_rl16(pb);
470 for(i=0;i<desc_count;i++) {
471 int name_len,value_type,value_len;
472 char name[1024];
473
474 name_len = avio_rl16(pb);
475 if (name_len%2) // must be even, broken lavf versions wrote len-1
476 name_len += 1;
477 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
478 avio_skip(pb, name_len - ret);
479 value_type = avio_rl16(pb);
480 value_len = avio_rl16(pb);
481 if (!value_type && value_len%2)
482 value_len += 1;
483 /**
484 * My sample has that stream set to 0 maybe that mean the container.
485 * Asf stream count start at 1. I am using 0 to the container value since it's unused
486 */
487 if (!strcmp(name, "AspectRatioX")){
488 asf->dar[0].num= get_value(s->pb, value_type);
489 } else if(!strcmp(name, "AspectRatioY")){
490 asf->dar[0].den= get_value(s->pb, value_type);
491 } else
492 get_tag(s, name, value_type, value_len);
493 }
494
495 return 0;
496 }
497
498 static int asf_read_language_list(AVFormatContext *s, int64_t size)
499 {
500 AVIOContext *pb = s->pb;
501 ASFContext *asf = s->priv_data;
502 int j, ret;
503 int stream_count = avio_rl16(pb);
504 for(j = 0; j < stream_count; j++) {
505 char lang[6];
506 unsigned int lang_len = avio_r8(pb);
507 if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
508 avio_skip(pb, lang_len - ret);
509 if (j < 128)
510 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
511 }
512
513 return 0;
514 }
515
516 static int asf_read_metadata(AVFormatContext *s, int64_t size)
517 {
518 AVIOContext *pb = s->pb;
519 ASFContext *asf = s->priv_data;
520 int n, stream_num, name_len, value_len, value_type, value_num;
521 int ret, i;
522 n = avio_rl16(pb);
523
524 for(i=0;i<n;i++) {
525 char name[1024];
526
527 avio_rl16(pb); //lang_list_index
528 stream_num= avio_rl16(pb);
529 name_len= avio_rl16(pb);
530 value_type= avio_rl16(pb);
531 value_len= avio_rl32(pb);
532
533 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
534 avio_skip(pb, name_len - ret);
535 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
536 value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
537 avio_skip(pb, value_len - 2);
538
539 if(stream_num<128){
540 if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
541 else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num;
542 }
543 }
544
545 return 0;
546 }
547
548 static int asf_read_marker(AVFormatContext *s, int64_t size)
549 {
550 AVIOContext *pb = s->pb;
551 int i, count, name_len, ret;
552 char name[1024];
553
554 avio_rl64(pb); // reserved 16 bytes
555 avio_rl64(pb); // ...
556 count = avio_rl32(pb); // markers count
557 avio_rl16(pb); // reserved 2 bytes
558 name_len = avio_rl16(pb); // name length
559 for(i=0;i<name_len;i++){
560 avio_r8(pb); // skip the name
561 }
562
563 for(i=0;i<count;i++){
564 int64_t pres_time;
565 int name_len;
566
567 avio_rl64(pb); // offset, 8 bytes
568 pres_time = avio_rl64(pb); // presentation time
569 avio_rl16(pb); // entry length
570 avio_rl32(pb); // send time
571 avio_rl32(pb); // flags
572 name_len = avio_rl32(pb); // name length
573 if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
574 avio_skip(pb, name_len - ret);
575 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
576 }
577
578 return 0;
579 }
580
581 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
582 {
583 ASFContext *asf = s->priv_data;
584 ff_asf_guid g;
585 AVIOContext *pb = s->pb;
586 int i;
587 int64_t gsize;
588
589 ff_get_guid(pb, &g);
590 if (ff_guidcmp(&g, &ff_asf_header))
591 return -1;
592 avio_rl64(pb);
593 avio_rl32(pb);
594 avio_r8(pb);
595 avio_r8(pb);
596 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
597 for(;;) {
598 uint64_t gpos= avio_tell(pb);
599 ff_get_guid(pb, &g);
600 gsize = avio_rl64(pb);
601 av_dlog(s, "%08"PRIx64": ", gpos);
602 print_guid(&g);
603 av_dlog(s, " size=0x%"PRIx64"\n", gsize);
604 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
605 asf->data_object_offset = avio_tell(pb);
606 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
607 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
608 asf->data_object_size = gsize - 24;
609 } else {
610 asf->data_object_size = (uint64_t)-1;
611 }
612 break;
613 }
614 if (gsize < 24)
615 return -1;
616 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
617 asf_read_file_properties(s, gsize);
618 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
619 asf_read_stream_properties(s, gsize);
620 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
621 asf_read_content_desc(s, gsize);
622 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
623 asf_read_language_list(s, gsize);
624 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
625 asf_read_ext_content_desc(s, gsize);
626 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
627 asf_read_metadata(s, gsize);
628 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
629 asf_read_ext_stream_properties(s, gsize);
630
631 // there could be a optional stream properties object to follow
632 // if so the next iteration will pick it up
633 continue;
634 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
635 int v1, v2;
636 ff_get_guid(pb, &g);
637 v1 = avio_rl32(pb);
638 v2 = avio_rl16(pb);
639 continue;
640 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
641 asf_read_marker(s, gsize);
642 } else if (pb->eof_reached) {
643 return -1;
644 } else {
645 if (!s->keylen) {
646 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
647 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
648 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
649 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
650 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
651 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
652 }
653 }
654 }
655 if(avio_tell(pb) != gpos + gsize)
656 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize);
657 avio_seek(pb, gpos + gsize, SEEK_SET);
658 }
659 ff_get_guid(pb, &g);
660 avio_rl64(pb);
661 avio_r8(pb);
662 avio_r8(pb);
663 if (pb->eof_reached)
664 return -1;
665 asf->data_offset = avio_tell(pb);
666 asf->packet_size_left = 0;
667
668
669 for(i=0; i<128; i++){
670 int stream_num= asf->asfid2avid[i];
671 if(stream_num>=0){
672 AVStream *st = s->streams[stream_num];
673 if (!st->codec->bit_rate)
674 st->codec->bit_rate = asf->stream_bitrates[i];
675 if (asf->dar[i].num > 0 && asf->dar[i].den > 0){
676 av_reduce(&st->sample_aspect_ratio.num,
677 &st->sample_aspect_ratio.den,
678 asf->dar[i].num, asf->dar[i].den, INT_MAX);
679 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
680 av_reduce(&st->sample_aspect_ratio.num,
681 &st->sample_aspect_ratio.den,
682 asf->dar[0].num, asf->dar[0].den, INT_MAX);
683
684 //av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
685
686 // copy and convert language codes to the frontend
687 if (asf->streams[i].stream_language_index < 128) {
688 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
689 if (rfc1766 && strlen(rfc1766) > 1) {
690 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
691 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
692 if (iso6392)
693 av_metadata_set2(&st->metadata, "language", iso6392, 0);
694 }
695 }
696 }
697 }
698
699 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
700
701 return 0;
702 }
703
704 #define DO_2BITS(bits, var, defval) \
705 switch (bits & 3) \
706 { \
707 case 3: var = avio_rl32(pb); rsize += 4; break; \
708 case 2: var = avio_rl16(pb); rsize += 2; break; \
709 case 1: var = avio_r8(pb); rsize++; break; \
710 default: var = defval; break; \
711 }
712
713 /**
714 * Load a single ASF packet into the demuxer.
715 * @param s demux context
716 * @param pb context to read data from
717 * @return 0 on success, <0 on error
718 */
719 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
720 {
721 ASFContext *asf = s->priv_data;
722 uint32_t packet_length, padsize;
723 int rsize = 8;
724 int c, d, e, off;
725
726 // if we do not know packet size, allow skipping up to 32 kB
727 off= 32768;
728 if (s->packet_size > 0)
729 off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
730
731 c=d=e=-1;
732 while(off-- > 0){
733 c=d; d=e;
734 e= avio_r8(pb);
735 if(c == 0x82 && !d && !e)
736 break;
737 }
738
739 if (c != 0x82) {
740 /**
741 * This code allows handling of -EAGAIN at packet boundaries (i.e.
742 * if the packet sync code above triggers -EAGAIN). This does not
743 * imply complete -EAGAIN handling support at random positions in
744 * the stream.
745 */
746 if (pb->error == AVERROR(EAGAIN))
747 return AVERROR(EAGAIN);
748 if (!pb->eof_reached)
749 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
750 }
751 if ((c & 0x8f) == 0x82) {
752 if (d || e) {
753 if (!pb->eof_reached)
754 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
755 return -1;
756 }
757 c= avio_r8(pb);
758 d= avio_r8(pb);
759 rsize+=3;
760 }else{
761 avio_seek(pb, -1, SEEK_CUR); //FIXME
762 }
763
764 asf->packet_flags = c;
765 asf->packet_property = d;
766
767 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
768 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
769 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
770
771 //the following checks prevent overflows and infinite loops
772 if(!packet_length || packet_length >= (1U<<29)){
773 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb));
774 return -1;
775 }
776 if(padsize >= packet_length){
777 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
778 return -1;
779 }
780
781 asf->packet_timestamp = avio_rl32(pb);
782 avio_rl16(pb); /* duration */
783 // rsize has at least 11 bytes which have to be present
784
785 if (asf->packet_flags & 0x01) {
786 asf->packet_segsizetype = avio_r8(pb); rsize++;
787 asf->packet_segments = asf->packet_segsizetype & 0x3f;
788 } else {
789 asf->packet_segments = 1;
790 asf->packet_segsizetype = 0x80;
791 }
792 asf->packet_size_left = packet_length - padsize - rsize;
793 if (packet_length < asf->hdr.min_pktsize)
794 padsize += asf->hdr.min_pktsize - packet_length;
795 asf->packet_padsize = padsize;
796 av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
797 return 0;
798 }
799
800 /**
801 *
802 * @return <0 if error
803 */
804 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
805 ASFContext *asf = s->priv_data;
806 int rsize = 1;
807 int num = avio_r8(pb);
808 int64_t ts0, ts1;
809
810 asf->packet_segments--;
811 asf->packet_key_frame = num >> 7;
812 asf->stream_index = asf->asfid2avid[num & 0x7f];
813 // sequence should be ignored!
814 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
815 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
816 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
817 //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);
818 if (asf->packet_replic_size >= 8) {
819 asf->packet_obj_size = avio_rl32(pb);
820 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
821 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
822 return -1;
823 }
824 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
825 if(asf->packet_replic_size >= 8+38+4){
826 // for(i=0; i<asf->packet_replic_size-8; i++)
827 // av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
828 // av_log(s, AV_LOG_DEBUG, "\n");
829 avio_skip(pb, 10);
830 ts0= avio_rl64(pb);
831 ts1= avio_rl64(pb);
832 avio_skip(pb, 12);
833 avio_rl32(pb);
834 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
835 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
836 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
837 }else
838 avio_skip(pb, asf->packet_replic_size - 8);
839 rsize += asf->packet_replic_size; // FIXME - check validity
840 } else if (asf->packet_replic_size==1){
841 // multipacket - frag_offset is beginning timestamp
842 asf->packet_time_start = asf->packet_frag_offset;
843 asf->packet_frag_offset = 0;
844 asf->packet_frag_timestamp = asf->packet_timestamp;
845
846 asf->packet_time_delta = avio_r8(pb);
847 rsize++;
848 }else if(asf->packet_replic_size!=0){
849 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
850 return -1;
851 }
852 if (asf->packet_flags & 0x01) {
853 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
854 if(asf->packet_frag_size > asf->packet_size_left - rsize){
855 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
856 return -1;
857 }
858 //printf("Fragsize %d\n", asf->packet_frag_size);
859 } else {
860 asf->packet_frag_size = asf->packet_size_left - rsize;
861 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
862 }
863 if (asf->packet_replic_size == 1) {
864 asf->packet_multi_size = asf->packet_frag_size;
865 if (asf->packet_multi_size > asf->packet_size_left)
866 return -1;
867 }
868 asf->packet_size_left -= rsize;
869 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
870
871 return 0;
872 }
873
874 /**
875 * Parse data from individual ASF packets (which were previously loaded
876 * with asf_get_packet()).
877 * @param s demux context
878 * @param pb context to read data from
879 * @param pkt pointer to store packet data into
880 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
881 * packets need to be loaded (through asf_get_packet())
882 */
883 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
884 {
885 ASFContext *asf = s->priv_data;
886 ASFStream *asf_st = 0;
887 for (;;) {
888 int ret;
889 if(pb->eof_reached)
890 return AVERROR_EOF;
891 if (asf->packet_size_left < FRAME_HEADER_SIZE
892 || asf->packet_segments < 1) {
893 //asf->packet_size_left <= asf->packet_padsize) {
894 int ret = asf->packet_size_left + asf->packet_padsize;
895 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
896 assert(ret>=0);
897 /* fail safe */
898 avio_skip(pb, ret);
899
900 asf->packet_pos= avio_tell(pb);
901 if (asf->data_object_size != (uint64_t)-1 &&
902 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
903 return AVERROR_EOF; /* Do not exceed the size of the data object */
904 return 1;
905 }
906 if (asf->packet_time_start == 0) {
907 if(asf_read_frame_header(s, pb) < 0){
908 asf->packet_segments= 0;
909 continue;
910 }
911 if (asf->stream_index < 0
912 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
913 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
914 ) {
915 asf->packet_time_start = 0;
916 /* unhandled packet (should not happen) */
917 avio_skip(pb, asf->packet_frag_size);
918 asf->packet_size_left -= asf->packet_frag_size;
919 if(asf->stream_index < 0)
920 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
921 continue;
922 }
923 asf->asf_st = s->streams[asf->stream_index]->priv_data;
924 }
925 asf_st = asf->asf_st;
926
927 if (asf->packet_replic_size == 1) {
928 // frag_offset is here used as the beginning timestamp
929 asf->packet_frag_timestamp = asf->packet_time_start;
930 asf->packet_time_start += asf->packet_time_delta;
931 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
932 asf->packet_size_left--;
933 asf->packet_multi_size--;
934 if (asf->packet_multi_size < asf->packet_obj_size)
935 {
936 asf->packet_time_start = 0;
937 avio_skip(pb, asf->packet_multi_size);
938 asf->packet_size_left -= asf->packet_multi_size;
939 continue;
940 }
941 asf->packet_multi_size -= asf->packet_obj_size;
942 //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);
943 }
944 if( /*asf->packet_frag_size == asf->packet_obj_size*/
945 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
946 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
947 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
948 asf_st->frag_offset, asf->packet_frag_size,
949 asf->packet_obj_size, asf_st->pkt.size);
950 asf->packet_obj_size= asf_st->pkt.size;
951 }
952
953 if ( asf_st->pkt.size != asf->packet_obj_size
954 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
955 if(asf_st->pkt.data){
956 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
957 asf_st->frag_offset = 0;
958 av_free_packet(&asf_st->pkt);
959 }
960 /* new packet */
961 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
962 asf_st->seq = asf->packet_seq;
963 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
964 asf_st->pkt.stream_index = asf->stream_index;
965 asf_st->pkt.pos =
966 asf_st->packet_pos= asf->packet_pos;
967 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
968 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
969 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
970 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
971 asf->packet_key_frame = 1;
972 if (asf->packet_key_frame)
973 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
974 }
975
976 /* read data */
977 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
978 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
979 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
980 asf->packet_size_left -= asf->packet_frag_size;
981 if (asf->packet_size_left < 0)
982 continue;
983
984 if( asf->packet_frag_offset >= asf_st->pkt.size
985 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
986 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
987 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
988 continue;
989 }
990
991 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
992 asf->packet_frag_size);
993 if (ret != asf->packet_frag_size) {
994 if (ret < 0 || asf->packet_frag_offset + ret == 0)
995 return ret < 0 ? ret : AVERROR_EOF;
996 if (asf_st->ds_span > 1) {
997 // scrambling, we can either drop it completely or fill the remainder
998 // TODO: should we fill the whole packet instead of just the current
999 // fragment?
1000 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1001 asf->packet_frag_size - ret);
1002 ret = asf->packet_frag_size;
1003 } else
1004 // no scrambling, so we can return partial packets
1005 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1006 }
1007 if (s->key && s->keylen == 20)
1008 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1009 ret);
1010 asf_st->frag_offset += ret;
1011 /* test if whole packet is read */
1012 if (asf_st->frag_offset == asf_st->pkt.size) {
1013 //workaround for macroshit radio DVR-MS files
1014 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
1015 && asf_st->pkt.size > 100){
1016 int i;
1017 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
1018 if(i == asf_st->pkt.size){
1019 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1020 asf_st->frag_offset = 0;
1021 av_free_packet(&asf_st->pkt);
1022 continue;
1023 }
1024 }
1025
1026 /* return packet */
1027 if (asf_st->ds_span > 1) {
1028 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
1029 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);
1030 }else{
1031 /* packet descrambling */
1032 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
1033 if (newdata) {
1034 int offset = 0;
1035 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1036 while (offset < asf_st->pkt.size) {
1037 int off = offset / asf_st->ds_chunk_size;
1038 int row = off / asf_st->ds_span;
1039 int col = off % asf_st->ds_span;
1040 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1041 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1042
1043 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1044 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1045 memcpy(newdata + offset,
1046 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1047 asf_st->ds_chunk_size);
1048 offset += asf_st->ds_chunk_size;
1049 }
1050 av_free(asf_st->pkt.data);
1051 asf_st->pkt.data = newdata;
1052 }
1053 }
1054 }
1055 asf_st->frag_offset = 0;
1056 *pkt= asf_st->pkt;
1057 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1058 asf_st->pkt.size = 0;
1059 asf_st->pkt.data = 0;
1060 break; // packet completed
1061 }
1062 }
1063 return 0;
1064 }
1065
1066 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1067 {
1068 ASFContext *asf = s->priv_data;
1069
1070 for (;;) {
1071 int ret;
1072
1073 /* parse cached packets, if any */
1074 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1075 return ret;
1076 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1077 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
1078 asf->packet_time_start = 0;
1079 }
1080
1081 return 0;
1082 }
1083
1084 // Added to support seeking after packets have been read
1085 // If information is not reset, read_packet fails due to
1086 // leftover information from previous reads
1087 static void asf_reset_header(AVFormatContext *s)
1088 {
1089 ASFContext *asf = s->priv_data;
1090 ASFStream *asf_st;
1091 int i;
1092
1093 asf->packet_size_left = 0;
1094 asf->packet_segments = 0;
1095 asf->packet_flags = 0;
1096 asf->packet_property = 0;
1097 asf->packet_timestamp = 0;
1098 asf->packet_segsizetype = 0;
1099 asf->packet_segments = 0;
1100 asf->packet_seq = 0;
1101 asf->packet_replic_size = 0;
1102 asf->packet_key_frame = 0;
1103 asf->packet_padsize = 0;
1104 asf->packet_frag_offset = 0;
1105 asf->packet_frag_size = 0;
1106 asf->packet_frag_timestamp = 0;
1107 asf->packet_multi_size = 0;
1108 asf->packet_obj_size = 0;
1109 asf->packet_time_delta = 0;
1110 asf->packet_time_start = 0;
1111
1112 for(i=0; i<s->nb_streams; i++){
1113 asf_st= s->streams[i]->priv_data;
1114 av_free_packet(&asf_st->pkt);
1115 asf_st->frag_offset=0;
1116 asf_st->seq=0;
1117 }
1118 asf->asf_st= NULL;
1119 }
1120
1121 static int asf_read_close(AVFormatContext *s)
1122 {
1123 int i;
1124
1125 asf_reset_header(s);
1126 for(i=0;i<s->nb_streams;i++) {
1127 AVStream *st = s->streams[i];
1128 av_free(st->codec->palctrl);
1129 }
1130 return 0;
1131 }
1132
1133 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1134 {
1135 AVPacket pkt1, *pkt = &pkt1;
1136 ASFStream *asf_st;
1137 int64_t pts;
1138 int64_t pos= *ppos;
1139 int i;
1140 int64_t start_pos[ASF_MAX_STREAMS];
1141
1142 for(i=0; i<s->nb_streams; i++){
1143 start_pos[i]= pos;
1144 }
1145
1146 if (s->packet_size > 0)
1147 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1148 *ppos= pos;
1149 avio_seek(s->pb, pos, SEEK_SET);
1150
1151 //printf("asf_read_pts\n");
1152 asf_reset_header(s);
1153 for(;;){
1154 if (av_read_frame(s, pkt) < 0){
1155 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1156 return AV_NOPTS_VALUE;
1157 }
1158
1159 pts= pkt->pts;
1160
1161 av_free_packet(pkt);
1162 if(pkt->flags&AV_PKT_FLAG_KEY){
1163 i= pkt->stream_index;
1164
1165 asf_st= s->streams[i]->priv_data;
1166
1167 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1168 pos= asf_st->packet_pos;
1169
1170 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1171 start_pos[i]= asf_st->packet_pos + 1;
1172
1173 if(pkt->stream_index == stream_index)
1174 break;
1175 }
1176 }
1177
1178 *ppos= pos;
1179 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1180
1181 return pts;
1182 }
1183
1184 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1185 {
1186 ff_asf_guid g;
1187 ASFContext *asf = s->priv_data;
1188 int64_t current_pos= avio_tell(s->pb);
1189 int i;
1190
1191 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1192 ff_get_guid(s->pb, &g);
1193
1194 /* the data object can be followed by other top-level objects,
1195 skip them until the simple index object is reached */
1196 while (ff_guidcmp(&g, &index_guid)) {
1197 int64_t gsize= avio_rl64(s->pb);
1198 if (gsize < 24 || s->pb->eof_reached) {
1199 avio_seek(s->pb, current_pos, SEEK_SET);
1200 return;
1201 }
1202 avio_skip(s->pb, gsize-24);
1203 ff_get_guid(s->pb, &g);
1204 }
1205
1206 {
1207 int64_t itime, last_pos=-1;
1208 int pct, ict;
1209 int64_t av_unused gsize= avio_rl64(s->pb);
1210 ff_get_guid(s->pb, &g);
1211 itime=avio_rl64(s->pb);
1212 pct=avio_rl32(s->pb);
1213 ict=avio_rl32(s->pb);
1214 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1215
1216 for (i=0;i<ict;i++){
1217 int pktnum=avio_rl32(s->pb);
1218 int pktct =avio_rl16(s->pb);
1219 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1220 int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1221
1222 if(pos != last_pos){
1223 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", pktnum, pktct, index_pts);
1224 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1225 last_pos=pos;
1226 }
1227 }
1228 asf->index_read= 1;
1229 }
1230 avio_seek(s->pb, current_pos, SEEK_SET);
1231 }
1232
1233 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1234 {
1235 ASFContext *asf = s->priv_data;
1236 AVStream *st = s->streams[stream_index];
1237 int64_t pos;
1238 int index;
1239
1240 if (s->packet_size <= 0)
1241 return -1;
1242
1243 /* Try using the protocol's read_seek if available */
1244 if(s->pb) {
1245 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1246 if(ret >= 0)
1247 asf_reset_header(s);
1248 if (ret != AVERROR(ENOSYS))
1249 return ret;
1250 }
1251
1252 if (!asf->index_read)
1253 asf_build_simple_index(s, stream_index);
1254
1255 if(!(asf->index_read && st->index_entries)){
1256 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1257 return -1;
1258 }else{
1259 index= av_index_search_timestamp(st, pts, flags);
1260 if(index<0)
1261 return -1;
1262
1263 /* find the position */
1264 pos = st->index_entries[index].pos;
1265
1266 // various attempts to find key frame have failed so far
1267 // asf_reset_header(s);
1268 // avio_seek(s->pb, pos, SEEK_SET);
1269 // key_pos = pos;
1270 // for(i=0;i<16;i++){
1271 // pos = avio_tell(s->pb);
1272 // if (av_read_frame(s, &pkt) < 0){
1273 // av_log(s, AV_LOG_INFO, "seek failed\n");
1274 // return -1;
1275 // }
1276 // asf_st = s->streams[stream_index]->priv_data;
1277 // pos += st->parser->frame_offset;
1278 //
1279 // if (pkt.size > b) {
1280 // b = pkt.size;
1281 // key_pos = pos;
1282 // }
1283 //
1284 // av_free_packet(&pkt);
1285 // }
1286
1287 /* do the seek */
1288 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1289 avio_seek(s->pb, pos, SEEK_SET);
1290 }
1291 asf_reset_header(s);
1292 return 0;
1293 }
1294
1295 AVInputFormat ff_asf_demuxer = {
1296 "asf",
1297 NULL_IF_CONFIG_SMALL("ASF format"),
1298 sizeof(ASFContext),
1299 asf_probe,
1300 asf_read_header,
1301 asf_read_packet,
1302 asf_read_close,
1303 asf_read_seek,
1304 asf_read_pts,
1305 };