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