Ticket #358: asfdec.c

File asfdec.c, 47.4 KB (added by bwallen, 15 years ago)

Commented out line 1316, NOBINSEARCH and NOGENSEARCH. Seems to fix the problem

Line 
1/*
2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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
37typedef 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
84static 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
89static 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) \
94if (!ff_guidcmp(g, &cmp)) \
95 av_dlog(NULL, "(GUID: %s) ", #cmp)
96
97static 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
135static int asf_probe(AVProbeData *pd)
136{
137 /* check file header */
138 if (!ff_guidcmp(pd->buf, &ff_asf_header))
139 return AVPROBE_SCORE_MAX;
140 else
141 return 0;
142}
143
144static int get_value(AVIOContext *pb, int type){
145 switch(type){
146 case 2: return avio_rl32(pb);
147 case 3: return avio_rl32(pb);
148 case 4: return avio_rl64(pb);
149 case 5: return avio_rl16(pb);
150 default:return INT_MIN;
151 }
152}
153
154static void get_tag(AVFormatContext *s, const char *key, int type, int len)
155{
156 char *value;
157 int64_t off = avio_tell(s->pb);
158
159 if ((unsigned)len >= (UINT_MAX - 1)/2)
160 return;
161
162 value = av_malloc(2*len+1);
163 if (!value)
164 goto finish;
165
166 if (type == 0) { // UTF16-LE
167 avio_get_str16le(s->pb, len, value, 2*len + 1);
168 } else if (type == -1) { // ASCII
169 get_buffer(s->pb, value, len);
170 value[len]=0;
171 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
172 uint64_t num = get_value(s->pb, type);
173 snprintf(value, len, "%"PRIu64, num);
174 } else {
175 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
176 goto finish;
177 }
178 if (*value)
179 av_dict_set(&s->metadata, key, value, 0);
180finish:
181 av_freep(&value);
182 avio_seek(s->pb, off + len, SEEK_SET);
183}
184
185static int asf_read_file_properties(AVFormatContext *s, int64_t size)
186{
187 ASFContext *asf = s->priv_data;
188 AVIOContext *pb = s->pb;
189
190 ff_get_guid(pb, &asf->hdr.guid);
191 asf->hdr.file_size = avio_rl64(pb);
192 asf->hdr.create_time = avio_rl64(pb);
193 avio_rl64(pb); /* number of packets */
194 asf->hdr.play_time = avio_rl64(pb);
195 asf->hdr.send_time = avio_rl64(pb);
196 asf->hdr.preroll = avio_rl32(pb);
197 asf->hdr.ignore = avio_rl32(pb);
198 asf->hdr.flags = avio_rl32(pb);
199 asf->hdr.min_pktsize = avio_rl32(pb);
200 asf->hdr.max_pktsize = avio_rl32(pb);
201 asf->hdr.max_bitrate = avio_rl32(pb);
202 s->packet_size = asf->hdr.max_pktsize;
203
204 return 0;
205}
206
207static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
208{
209 ASFContext *asf = s->priv_data;
210 AVIOContext *pb = s->pb;
211 AVStream *st;
212 ASFStream *asf_st;
213 ff_asf_guid g;
214 enum AVMediaType type;
215 int type_specific_size, sizeX;
216 unsigned int tag1;
217 int64_t pos1, pos2, start_time;
218 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
219
220 if (s->nb_streams == ASF_MAX_STREAMS) {
221 av_log(s, AV_LOG_ERROR, "too many streams\n");
222 return AVERROR(EINVAL);
223 }
224
225 pos1 = avio_tell(pb);
226
227 st = avformat_new_stream(s, NULL);
228 if (!st)
229 return AVERROR(ENOMEM);
230 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
231 asf_st = av_mallocz(sizeof(ASFStream));
232 if (!asf_st)
233 return AVERROR(ENOMEM);
234 st->priv_data = asf_st;
235 start_time = asf->hdr.preroll;
236
237 asf_st->stream_language_index = 128; // invalid stream index means no language info
238
239 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
240 st->duration = asf->hdr.play_time /
241 (10000000 / 1000) - start_time;
242 }
243 ff_get_guid(pb, &g);
244
245 test_for_ext_stream_audio = 0;
246 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
247 type = AVMEDIA_TYPE_AUDIO;
248 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
249 type = AVMEDIA_TYPE_VIDEO;
250 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
251 type = AVMEDIA_TYPE_VIDEO;
252 st->codec->codec_id = CODEC_ID_MJPEG;
253 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
254 type = AVMEDIA_TYPE_DATA;
255 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
256 test_for_ext_stream_audio = 1;
257 type = AVMEDIA_TYPE_UNKNOWN;
258 } else {
259 return -1;
260 }
261 ff_get_guid(pb, &g);
262 avio_skip(pb, 8); /* total_size */
263 type_specific_size = avio_rl32(pb);
264 avio_rl32(pb);
265 st->id = avio_rl16(pb) & 0x7f; /* stream id */
266 // mapping of asf ID to AV stream ID;
267 asf->asfid2avid[st->id] = s->nb_streams - 1;
268
269 avio_rl32(pb);
270
271 if (test_for_ext_stream_audio) {
272 ff_get_guid(pb, &g);
273 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
274 type = AVMEDIA_TYPE_AUDIO;
275 is_dvr_ms_audio=1;
276 ff_get_guid(pb, &g);
277 avio_rl32(pb);
278 avio_rl32(pb);
279 avio_rl32(pb);
280 ff_get_guid(pb, &g);
281 avio_rl32(pb);
282 }
283 }
284
285 st->codec->codec_type = type;
286 if (type == AVMEDIA_TYPE_AUDIO) {
287 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
288 if (ret < 0)
289 return ret;
290 if (is_dvr_ms_audio) {
291 // codec_id and codec_tag are unreliable in dvr_ms
292 // files. Set them later by probing stream.
293 st->request_probe= 1;
294 st->codec->codec_tag = 0;
295 }
296 if (st->codec->codec_id == CODEC_ID_AAC) {
297 st->need_parsing = AVSTREAM_PARSE_NONE;
298 } else {
299 st->need_parsing = AVSTREAM_PARSE_FULL;
300 }
301 /* We have to init the frame size at some point .... */
302 pos2 = avio_tell(pb);
303 if (size >= (pos2 + 8 - pos1 + 24)) {
304 asf_st->ds_span = avio_r8(pb);
305 asf_st->ds_packet_size = avio_rl16(pb);
306 asf_st->ds_chunk_size = avio_rl16(pb);
307 avio_rl16(pb); //ds_data_size
308 avio_r8(pb); //ds_silence_data
309 }
310 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
311 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
312 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
313 if (asf_st->ds_span > 1) {
314 if (!asf_st->ds_chunk_size
315 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
316 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
317 asf_st->ds_span = 0; // disable descrambling
318 }
319 switch (st->codec->codec_id) {
320 case CODEC_ID_MP3:
321 st->codec->frame_size = MPA_FRAME_SIZE;
322 break;
323 case CODEC_ID_PCM_S16LE:
324 case CODEC_ID_PCM_S16BE:
325 case CODEC_ID_PCM_U16LE:
326 case CODEC_ID_PCM_U16BE:
327 case CODEC_ID_PCM_S8:
328 case CODEC_ID_PCM_U8:
329 case CODEC_ID_PCM_ALAW:
330 case CODEC_ID_PCM_MULAW:
331 st->codec->frame_size = 1;
332 break;
333 default:
334 /* This is probably wrong, but it prevents a crash later */
335 st->codec->frame_size = 1;
336 break;
337 }
338 } else if (type == AVMEDIA_TYPE_VIDEO &&
339 size - (avio_tell(pb) - pos1 + 24) >= 51) {
340 avio_rl32(pb);
341 avio_rl32(pb);
342 avio_r8(pb);
343 avio_rl16(pb); /* size */
344 sizeX= avio_rl32(pb); /* size */
345 st->codec->width = avio_rl32(pb);
346 st->codec->height = avio_rl32(pb);
347 /* not available for asf */
348 avio_rl16(pb); /* panes */
349 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
350 tag1 = avio_rl32(pb);
351 avio_skip(pb, 20);
352 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
353 if (sizeX > 40) {
354 st->codec->extradata_size = sizeX - 40;
355 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
356 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
357 }
358
359 /* Extract palette from extradata if bpp <= 8 */
360 /* This code assumes that extradata contains only palette */
361 /* This is true for all paletted codecs implemented in ffmpeg */
362 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
363 int av_unused i;
364#if HAVE_BIGENDIAN
365 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
366 asf_st->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
367#else
368 memcpy(asf_st->palette, st->codec->extradata,
369 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
370#endif
371 asf_st->palette_changed = 1;
372 }
373
374 st->codec->codec_tag = tag1;
375 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
376 if(tag1 == MKTAG('D', 'V', 'R', ' ')){
377 st->need_parsing = AVSTREAM_PARSE_FULL;
378 // 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
379 st->codec->width =
380 st->codec->height = 0;
381 av_freep(&st->codec->extradata);
382 st->codec->extradata_size=0;
383 }
384 if(st->codec->codec_id == CODEC_ID_H264)
385 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
386 }
387 pos2 = avio_tell(pb);
388 avio_skip(pb, size - (pos2 - pos1 + 24));
389
390 return 0;
391}
392
393static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
394{
395 ASFContext *asf = s->priv_data;
396 AVIOContext *pb = s->pb;
397 ff_asf_guid g;
398 int ext_len, payload_ext_ct, stream_ct, i;
399 uint32_t leak_rate, stream_num;
400 unsigned int stream_languageid_index;
401
402 avio_rl64(pb); // starttime
403 avio_rl64(pb); // endtime
404 leak_rate = avio_rl32(pb); // leak-datarate
405 avio_rl32(pb); // bucket-datasize
406 avio_rl32(pb); // init-bucket-fullness
407 avio_rl32(pb); // alt-leak-datarate
408 avio_rl32(pb); // alt-bucket-datasize
409 avio_rl32(pb); // alt-init-bucket-fullness
410 avio_rl32(pb); // max-object-size
411 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
412 stream_num = avio_rl16(pb); // stream-num
413
414 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
415 if (stream_num < 128)
416 asf->streams[stream_num].stream_language_index = stream_languageid_index;
417
418 avio_rl64(pb); // avg frametime in 100ns units
419 stream_ct = avio_rl16(pb); //stream-name-count
420 payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
421
422 if (stream_num < 128)
423 asf->stream_bitrates[stream_num] = leak_rate;
424
425 for (i=0; i<stream_ct; i++){
426 avio_rl16(pb);
427 ext_len = avio_rl16(pb);
428 avio_skip(pb, ext_len);
429 }
430
431 for (i=0; i<payload_ext_ct; i++){
432 ff_get_guid(pb, &g);
433 avio_skip(pb, 2);
434 ext_len=avio_rl32(pb);
435 avio_skip(pb, ext_len);
436 }
437
438 return 0;
439}
440
441static int asf_read_content_desc(AVFormatContext *s, int64_t size)
442{
443 AVIOContext *pb = s->pb;
444 int len1, len2, len3, len4, len5;
445
446 len1 = avio_rl16(pb);
447 len2 = avio_rl16(pb);
448 len3 = avio_rl16(pb);
449 len4 = avio_rl16(pb);
450 len5 = avio_rl16(pb);
451 get_tag(s, "title" , 0, len1);
452 get_tag(s, "author" , 0, len2);
453 get_tag(s, "copyright", 0, len3);
454 get_tag(s, "comment" , 0, len4);
455 avio_skip(pb, len5);
456
457 return 0;
458}
459
460static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
461{
462 AVIOContext *pb = s->pb;
463 ASFContext *asf = s->priv_data;
464 int desc_count, i, ret;
465
466 desc_count = avio_rl16(pb);
467 for(i=0;i<desc_count;i++) {
468 int name_len,value_type,value_len;
469 char name[1024];
470
471 name_len = avio_rl16(pb);
472 if (name_len%2) // must be even, broken lavf versions wrote len-1
473 name_len += 1;
474 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
475 avio_skip(pb, name_len - ret);
476 value_type = avio_rl16(pb);
477 value_len = avio_rl16(pb);
478 if (!value_type && value_len%2)
479 value_len += 1;
480 /**
481 * My sample has that stream set to 0 maybe that mean the container.
482 * Asf stream count start at 1. I am using 0 to the container value since it's unused
483 */
484 if (!strcmp(name, "AspectRatioX")){
485 asf->dar[0].num= get_value(s->pb, value_type);
486 } else if(!strcmp(name, "AspectRatioY")){
487 asf->dar[0].den= get_value(s->pb, value_type);
488 } else
489 get_tag(s, name, value_type, value_len);
490 }
491
492 return 0;
493}
494
495static int asf_read_language_list(AVFormatContext *s, int64_t size)
496{
497 AVIOContext *pb = s->pb;
498 ASFContext *asf = s->priv_data;
499 int j, ret;
500 int stream_count = avio_rl16(pb);
501 for(j = 0; j < stream_count; j++) {
502 char lang[6];
503 unsigned int lang_len = avio_r8(pb);
504 if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
505 avio_skip(pb, lang_len - ret);
506 if (j < 128)
507 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
508 }
509
510 return 0;
511}
512
513static int asf_read_metadata(AVFormatContext *s, int64_t size)
514{
515 AVIOContext *pb = s->pb;
516 ASFContext *asf = s->priv_data;
517 int n, stream_num, name_len, value_len, value_num;
518 int ret, i;
519 n = avio_rl16(pb);
520
521 for(i=0;i<n;i++) {
522 char name[1024];
523
524 avio_rl16(pb); //lang_list_index
525 stream_num= avio_rl16(pb);
526 name_len= avio_rl16(pb);
527 avio_skip(pb, 2); /* value_type */
528 value_len= avio_rl32(pb);
529
530 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
531 avio_skip(pb, name_len - ret);
532 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
533 value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
534 avio_skip(pb, value_len - 2);
535
536 if(stream_num<128){
537 if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
538 else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num;
539 }
540 }
541
542 return 0;
543}
544
545static int asf_read_marker(AVFormatContext *s, int64_t size)
546{
547 AVIOContext *pb = s->pb;
548 int i, count, name_len, ret;
549 char name[1024];
550
551 avio_rl64(pb); // reserved 16 bytes
552 avio_rl64(pb); // ...
553 count = avio_rl32(pb); // markers count
554 avio_rl16(pb); // reserved 2 bytes
555 name_len = avio_rl16(pb); // name length
556 for(i=0;i<name_len;i++){
557 avio_r8(pb); // skip the name
558 }
559
560 for(i=0;i<count;i++){
561 int64_t pres_time;
562 int name_len;
563
564 avio_rl64(pb); // offset, 8 bytes
565 pres_time = avio_rl64(pb); // presentation time
566 avio_rl16(pb); // entry length
567 avio_rl32(pb); // send time
568 avio_rl32(pb); // flags
569 name_len = avio_rl32(pb); // name length
570 if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
571 avio_skip(pb, name_len - ret);
572 avpriv_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
573 }
574
575 return 0;
576}
577
578static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
579{
580 ASFContext *asf = s->priv_data;
581 ff_asf_guid g;
582 AVIOContext *pb = s->pb;
583 int i;
584 int64_t gsize;
585
586 ff_get_guid(pb, &g);
587 if (ff_guidcmp(&g, &ff_asf_header))
588 return -1;
589 avio_rl64(pb);
590 avio_rl32(pb);
591 avio_r8(pb);
592 avio_r8(pb);
593 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
594 for(;;) {
595 uint64_t gpos= avio_tell(pb);
596 ff_get_guid(pb, &g);
597 gsize = avio_rl64(pb);
598 av_dlog(s, "%08"PRIx64": ", gpos);
599 print_guid(&g);
600 av_dlog(s, " size=0x%"PRIx64"\n", gsize);
601 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
602 asf->data_object_offset = avio_tell(pb);
603 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
604 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
605 asf->data_object_size = gsize - 24;
606 } else {
607 asf->data_object_size = (uint64_t)-1;
608 }
609 break;
610 }
611 if (gsize < 24)
612 return -1;
613 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
614 asf_read_file_properties(s, gsize);
615 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
616 asf_read_stream_properties(s, gsize);
617 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
618 asf_read_content_desc(s, gsize);
619 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
620 asf_read_language_list(s, gsize);
621 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
622 asf_read_ext_content_desc(s, gsize);
623 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
624 asf_read_metadata(s, gsize);
625 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
626 asf_read_ext_stream_properties(s, gsize);
627
628 // there could be a optional stream properties object to follow
629 // if so the next iteration will pick it up
630 continue;
631 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
632 ff_get_guid(pb, &g);
633 avio_skip(pb, 6);
634 continue;
635 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
636 asf_read_marker(s, gsize);
637 } else if (url_feof(pb)) {
638 return -1;
639 } else {
640 if (!s->keylen) {
641 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
642 unsigned int len;
643 AVPacket pkt;
644 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
645 len= avio_rl32(pb);
646 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
647 av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt);
648 len= avio_rl32(pb);
649 get_tag(s, "ASF_Protection_Type", -1, len);
650 len= avio_rl32(pb);
651 get_tag(s, "ASF_Key_ID", -1, len);
652 len= avio_rl32(pb);
653 get_tag(s, "ASF_License_URL", -1, len);
654 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
655 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
656 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
657 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
658 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
659 }
660 }
661 }
662 if(avio_tell(pb) != gpos + gsize)
663 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize);
664 avio_seek(pb, gpos + gsize, SEEK_SET);
665 }
666 ff_get_guid(pb, &g);
667 avio_rl64(pb);
668 avio_r8(pb);
669 avio_r8(pb);
670 if (url_feof(pb))
671 return -1;
672 asf->data_offset = avio_tell(pb);
673 asf->packet_size_left = 0;
674
675
676 for(i=0; i<128; i++){
677 int stream_num= asf->asfid2avid[i];
678 if(stream_num>=0){
679 AVStream *st = s->streams[stream_num];
680 if (!st->codec->bit_rate)
681 st->codec->bit_rate = asf->stream_bitrates[i];
682 if (asf->dar[i].num > 0 && asf->dar[i].den > 0){
683 av_reduce(&st->sample_aspect_ratio.num,
684 &st->sample_aspect_ratio.den,
685 asf->dar[i].num, asf->dar[i].den, INT_MAX);
686 } 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.
687 av_reduce(&st->sample_aspect_ratio.num,
688 &st->sample_aspect_ratio.den,
689 asf->dar[0].num, asf->dar[0].den, INT_MAX);
690
691//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);
692
693 // copy and convert language codes to the frontend
694 if (asf->streams[i].stream_language_index < 128) {
695 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
696 if (rfc1766 && strlen(rfc1766) > 1) {
697 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
698 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
699 if (iso6392)
700 av_dict_set(&st->metadata, "language", iso6392, 0);
701 }
702 }
703 }
704 }
705
706 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
707
708 return 0;
709}
710
711#define DO_2BITS(bits, var, defval) \
712 switch (bits & 3) \
713 { \
714 case 3: var = avio_rl32(pb); rsize += 4; break; \
715 case 2: var = avio_rl16(pb); rsize += 2; break; \
716 case 1: var = avio_r8(pb); rsize++; break; \
717 default: var = defval; break; \
718 }
719
720/**
721 * Load a single ASF packet into the demuxer.
722 * @param s demux context
723 * @param pb context to read data from
724 * @return 0 on success, <0 on error
725 */
726static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
727{
728 ASFContext *asf = s->priv_data;
729 uint32_t packet_length, padsize;
730 int rsize = 8;
731 int c, d, e, off;
732
733 // if we do not know packet size, allow skipping up to 32 kB
734 off= 32768;
735 if (s->packet_size > 0)
736 off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
737
738 c=d=e=-1;
739 while(off-- > 0){
740 c=d; d=e;
741 e= avio_r8(pb);
742 if(c == 0x82 && !d && !e)
743 break;
744 }
745
746 if (c != 0x82) {
747 /**
748 * This code allows handling of -EAGAIN at packet boundaries (i.e.
749 * if the packet sync code above triggers -EAGAIN). This does not
750 * imply complete -EAGAIN handling support at random positions in
751 * the stream.
752 */
753 if (pb->error == AVERROR(EAGAIN))
754 return AVERROR(EAGAIN);
755 if (!url_feof(pb))
756 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
757 }
758 if ((c & 0x8f) == 0x82) {
759 if (d || e) {
760 if (!url_feof(pb))
761 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
762 return -1;
763 }
764 c= avio_r8(pb);
765 d= avio_r8(pb);
766 rsize+=3;
767 }else{
768 avio_seek(pb, -1, SEEK_CUR); //FIXME
769 }
770
771 asf->packet_flags = c;
772 asf->packet_property = d;
773
774 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
775 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
776 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
777
778 //the following checks prevent overflows and infinite loops
779 if(!packet_length || packet_length >= (1U<<29)){
780 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb));
781 return -1;
782 }
783 if(padsize >= packet_length){
784 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
785 return -1;
786 }
787
788 asf->packet_timestamp = avio_rl32(pb);
789 avio_rl16(pb); /* duration */
790 // rsize has at least 11 bytes which have to be present
791
792 if (asf->packet_flags & 0x01) {
793 asf->packet_segsizetype = avio_r8(pb); rsize++;
794 asf->packet_segments = asf->packet_segsizetype & 0x3f;
795 } else {
796 asf->packet_segments = 1;
797 asf->packet_segsizetype = 0x80;
798 }
799 asf->packet_size_left = packet_length - padsize - rsize;
800 if (packet_length < asf->hdr.min_pktsize)
801 padsize += asf->hdr.min_pktsize - packet_length;
802 asf->packet_padsize = padsize;
803 av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
804 return 0;
805}
806
807/**
808 *
809 * @return <0 if error
810 */
811static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
812 ASFContext *asf = s->priv_data;
813 int rsize = 1;
814 int num = avio_r8(pb);
815 int64_t ts0;
816
817 asf->packet_segments--;
818 asf->packet_key_frame = num >> 7;
819 asf->stream_index = asf->asfid2avid[num & 0x7f];
820 // sequence should be ignored!
821 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
822 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
823 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
824//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);
825 if (asf->packet_replic_size >= 8) {
826 asf->packet_obj_size = avio_rl32(pb);
827 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
828 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
829 return -1;
830 }
831 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
832 if(asf->packet_replic_size >= 8+38+4){
833// for(i=0; i<asf->packet_replic_size-8; i++)
834// av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
835// av_log(s, AV_LOG_DEBUG, "\n");
836 avio_skip(pb, 10);
837 ts0= avio_rl64(pb);
838 avio_skip(pb, 8);;
839 avio_skip(pb, 12);
840 avio_rl32(pb);
841 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
842 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
843 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
844 }else
845 avio_skip(pb, asf->packet_replic_size - 8);
846 rsize += asf->packet_replic_size; // FIXME - check validity
847 } else if (asf->packet_replic_size==1){
848 // multipacket - frag_offset is beginning timestamp
849 asf->packet_time_start = asf->packet_frag_offset;
850 asf->packet_frag_offset = 0;
851 asf->packet_frag_timestamp = asf->packet_timestamp;
852
853 asf->packet_time_delta = avio_r8(pb);
854 rsize++;
855 }else if(asf->packet_replic_size!=0){
856 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
857 return -1;
858 }
859 if (rsize > asf->packet_size_left) {
860 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
861 return -1;
862 }
863 if (asf->packet_flags & 0x01) {
864 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
865 if (rsize > asf->packet_size_left) {
866 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
867 return -1;
868 } else if(asf->packet_frag_size > asf->packet_size_left - rsize){
869 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
870 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize);
871 return -1;
872 } else {
873 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
874 asf->packet_size_left += diff;
875 asf->packet_padsize -= diff;
876 }
877 }
878 //printf("Fragsize %d\n", asf->packet_frag_size);
879 } else {
880 asf->packet_frag_size = asf->packet_size_left - rsize;
881 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
882 }
883 if (asf->packet_replic_size == 1) {
884 asf->packet_multi_size = asf->packet_frag_size;
885 if (asf->packet_multi_size > asf->packet_size_left)
886 return -1;
887 }
888 asf->packet_size_left -= rsize;
889 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
890
891 return 0;
892}
893
894/**
895 * Parse data from individual ASF packets (which were previously loaded
896 * with asf_get_packet()).
897 * @param s demux context
898 * @param pb context to read data from
899 * @param pkt pointer to store packet data into
900 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
901 * packets need to be loaded (through asf_get_packet())
902 */
903static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
904{
905 ASFContext *asf = s->priv_data;
906 ASFStream *asf_st = 0;
907 for (;;) {
908 int ret;
909 if(url_feof(pb))
910 return AVERROR_EOF;
911 if (asf->packet_size_left < FRAME_HEADER_SIZE
912 || asf->packet_segments < 1) {
913 //asf->packet_size_left <= asf->packet_padsize) {
914 int ret = asf->packet_size_left + asf->packet_padsize;
915 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
916 assert(ret>=0);
917 /* fail safe */
918 avio_skip(pb, ret);
919
920 asf->packet_pos= avio_tell(pb);
921 if (asf->data_object_size != (uint64_t)-1 &&
922 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
923 return AVERROR_EOF; /* Do not exceed the size of the data object */
924 return 1;
925 }
926 if (asf->packet_time_start == 0) {
927 if(asf_read_frame_header(s, pb) < 0){
928 asf->packet_segments= 0;
929 continue;
930 }
931 if (asf->stream_index < 0
932 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
933 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
934 ) {
935 asf->packet_time_start = 0;
936 /* unhandled packet (should not happen) */
937 avio_skip(pb, asf->packet_frag_size);
938 asf->packet_size_left -= asf->packet_frag_size;
939 if(asf->stream_index < 0)
940 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
941 continue;
942 }
943 asf->asf_st = s->streams[asf->stream_index]->priv_data;
944 }
945 asf_st = asf->asf_st;
946
947 if (asf->packet_replic_size == 1) {
948 // frag_offset is here used as the beginning timestamp
949 asf->packet_frag_timestamp = asf->packet_time_start;
950 asf->packet_time_start += asf->packet_time_delta;
951 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
952 asf->packet_size_left--;
953 asf->packet_multi_size--;
954 if (asf->packet_multi_size < asf->packet_obj_size)
955 {
956 asf->packet_time_start = 0;
957 avio_skip(pb, asf->packet_multi_size);
958 asf->packet_size_left -= asf->packet_multi_size;
959 continue;
960 }
961 asf->packet_multi_size -= asf->packet_obj_size;
962 //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);
963 }
964 if( /*asf->packet_frag_size == asf->packet_obj_size*/
965 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
966 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
967 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
968 asf_st->frag_offset, asf->packet_frag_size,
969 asf->packet_obj_size, asf_st->pkt.size);
970 asf->packet_obj_size= asf_st->pkt.size;
971 }
972
973 if ( asf_st->pkt.size != asf->packet_obj_size
974 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
975 if(asf_st->pkt.data){
976 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
977 asf_st->frag_offset = 0;
978 av_free_packet(&asf_st->pkt);
979 }
980 /* new packet */
981 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
982 asf_st->seq = asf->packet_seq;
983 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
984 asf_st->pkt.stream_index = asf->stream_index;
985 asf_st->pkt.pos =
986 asf_st->packet_pos= asf->packet_pos;
987 if (asf_st->pkt.data && asf_st->palette_changed) {
988 uint8_t *pal;
989 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE,
990 AVPALETTE_SIZE);
991 if (!pal) {
992 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
993 } else {
994 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
995 asf_st->palette_changed = 0;
996 }
997 }
998//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
999//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1000//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
1001 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1002 asf->packet_key_frame = 1;
1003 if (asf->packet_key_frame)
1004 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1005 }
1006
1007 /* read data */
1008 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1009 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1010 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1011 asf->packet_size_left -= asf->packet_frag_size;
1012 if (asf->packet_size_left < 0)
1013 continue;
1014
1015 if( asf->packet_frag_offset >= asf_st->pkt.size
1016 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
1017 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
1018 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
1019 continue;
1020 }
1021
1022 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1023 asf->packet_frag_size);
1024 if (ret != asf->packet_frag_size) {
1025 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1026 return ret < 0 ? ret : AVERROR_EOF;
1027 if (asf_st->ds_span > 1) {
1028 // scrambling, we can either drop it completely or fill the remainder
1029 // TODO: should we fill the whole packet instead of just the current
1030 // fragment?
1031 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1032 asf->packet_frag_size - ret);
1033 ret = asf->packet_frag_size;
1034 } else
1035 // no scrambling, so we can return partial packets
1036 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1037 }
1038 if (s->key && s->keylen == 20)
1039 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1040 ret);
1041 asf_st->frag_offset += ret;
1042 /* test if whole packet is read */
1043 if (asf_st->frag_offset == asf_st->pkt.size) {
1044 //workaround for macroshit radio DVR-MS files
1045 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
1046 && asf_st->pkt.size > 100){
1047 int i;
1048 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
1049 if(i == asf_st->pkt.size){
1050 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1051 asf_st->frag_offset = 0;
1052 av_free_packet(&asf_st->pkt);
1053 continue;
1054 }
1055 }
1056
1057 /* return packet */
1058 if (asf_st->ds_span > 1) {
1059 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
1060 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);
1061 }else{
1062 /* packet descrambling */
1063 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
1064 if (newdata) {
1065 int offset = 0;
1066 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1067 while (offset < asf_st->pkt.size) {
1068 int off = offset / asf_st->ds_chunk_size;
1069 int row = off / asf_st->ds_span;
1070 int col = off % asf_st->ds_span;
1071 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1072 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1073
1074 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1075 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1076 memcpy(newdata + offset,
1077 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1078 asf_st->ds_chunk_size);
1079 offset += asf_st->ds_chunk_size;
1080 }
1081 av_free(asf_st->pkt.data);
1082 asf_st->pkt.data = newdata;
1083 }
1084 }
1085 }
1086 asf_st->frag_offset = 0;
1087 *pkt= asf_st->pkt;
1088 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1089 asf_st->pkt.size = 0;
1090 asf_st->pkt.data = 0;
1091 break; // packet completed
1092 }
1093 }
1094 return 0;
1095}
1096
1097static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1098{
1099 ASFContext *asf = s->priv_data;
1100
1101 for (;;) {
1102 int ret;
1103
1104 /* parse cached packets, if any */
1105 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1106 return ret;
1107 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1108 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
1109 asf->packet_time_start = 0;
1110 }
1111}
1112
1113// Added to support seeking after packets have been read
1114// If information is not reset, read_packet fails due to
1115// leftover information from previous reads
1116static void asf_reset_header(AVFormatContext *s)
1117{
1118 ASFContext *asf = s->priv_data;
1119 ASFStream *asf_st;
1120 int i;
1121
1122 asf->packet_size_left = 0;
1123 asf->packet_segments = 0;
1124 asf->packet_flags = 0;
1125 asf->packet_property = 0;
1126 asf->packet_timestamp = 0;
1127 asf->packet_segsizetype = 0;
1128 asf->packet_segments = 0;
1129 asf->packet_seq = 0;
1130 asf->packet_replic_size = 0;
1131 asf->packet_key_frame = 0;
1132 asf->packet_padsize = 0;
1133 asf->packet_frag_offset = 0;
1134 asf->packet_frag_size = 0;
1135 asf->packet_frag_timestamp = 0;
1136 asf->packet_multi_size = 0;
1137 asf->packet_obj_size = 0;
1138 asf->packet_time_delta = 0;
1139 asf->packet_time_start = 0;
1140
1141 for(i=0; i<s->nb_streams; i++){
1142 asf_st= s->streams[i]->priv_data;
1143 av_free_packet(&asf_st->pkt);
1144 asf_st->frag_offset=0;
1145 asf_st->seq=0;
1146 }
1147 asf->asf_st= NULL;
1148}
1149
1150static int asf_read_close(AVFormatContext *s)
1151{
1152 asf_reset_header(s);
1153
1154 return 0;
1155}
1156
1157static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1158{
1159 AVPacket pkt1, *pkt = &pkt1;
1160 ASFStream *asf_st;
1161 int64_t pts;
1162 int64_t pos= *ppos;
1163 int i;
1164 int64_t start_pos[ASF_MAX_STREAMS];
1165
1166 for(i=0; i<s->nb_streams; i++){
1167 start_pos[i]= pos;
1168 }
1169
1170 if (s->packet_size > 0)
1171 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1172 *ppos= pos;
1173 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1174 return AV_NOPTS_VALUE;
1175
1176//printf("asf_read_pts\n");
1177 asf_reset_header(s);
1178 for(;;){
1179 if (av_read_frame(s, pkt) < 0){
1180 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1181 return AV_NOPTS_VALUE;
1182 }
1183
1184 pts= pkt->pts;
1185
1186 av_free_packet(pkt);
1187 if(pkt->flags&AV_PKT_FLAG_KEY){
1188 i= pkt->stream_index;
1189
1190 asf_st= s->streams[i]->priv_data;
1191
1192// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1193 pos= asf_st->packet_pos;
1194
1195 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1196 start_pos[i]= asf_st->packet_pos + 1;
1197
1198 if(pkt->stream_index == stream_index)
1199 break;
1200 }
1201 }
1202
1203 *ppos= pos;
1204//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1205
1206 return pts;
1207}
1208
1209static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1210{
1211 ff_asf_guid g;
1212 ASFContext *asf = s->priv_data;
1213 int64_t current_pos= avio_tell(s->pb);
1214 int i;
1215
1216 if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0) {
1217 asf->index_read= -1;
1218 return;
1219 }
1220
1221 ff_get_guid(s->pb, &g);
1222
1223 /* the data object can be followed by other top-level objects,
1224 skip them until the simple index object is reached */
1225 while (ff_guidcmp(&g, &index_guid)) {
1226 int64_t gsize= avio_rl64(s->pb);
1227 if (gsize < 24 || url_feof(s->pb)) {
1228 avio_seek(s->pb, current_pos, SEEK_SET);
1229 asf->index_read= -1;
1230 return;
1231 }
1232 avio_skip(s->pb, gsize-24);
1233 ff_get_guid(s->pb, &g);
1234 }
1235
1236 {
1237 int64_t itime, last_pos=-1;
1238 int pct, ict;
1239 int64_t av_unused gsize= avio_rl64(s->pb);
1240 ff_get_guid(s->pb, &g);
1241 itime=avio_rl64(s->pb);
1242 pct=avio_rl32(s->pb);
1243 ict=avio_rl32(s->pb);
1244 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1245
1246 for (i=0;i<ict;i++){
1247 int pktnum=avio_rl32(s->pb);
1248 int pktct =avio_rl16(s->pb);
1249 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1250 int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1251
1252 if(pos != last_pos){
1253 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", pktnum, pktct, index_pts);
1254 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1255 last_pos=pos;
1256 }
1257 }
1258 asf->index_read= 1;
1259 }
1260 avio_seek(s->pb, current_pos, SEEK_SET);
1261}
1262
1263static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1264{
1265 ASFContext *asf = s->priv_data;
1266 AVStream *st = s->streams[stream_index];
1267 int64_t pos;
1268 int index;
1269
1270 if (s->packet_size <= 0)
1271 return -1;
1272
1273 /* Try using the protocol's read_seek if available */
1274 if(s->pb) {
1275 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1276 if(ret >= 0)
1277 asf_reset_header(s);
1278 if (ret != AVERROR(ENOSYS))
1279 return ret;
1280 }
1281
1282 if (!asf->index_read)
1283 asf_build_simple_index(s, stream_index);
1284
1285 if((asf->index_read > 0 && st->index_entries)){
1286 index= av_index_search_timestamp(st, pts, flags);
1287 if(index >= 0) {
1288 /* find the position */
1289 pos = st->index_entries[index].pos;
1290
1291 /* do the seek */
1292 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1293 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1294 return -1;
1295 asf_reset_header(s);
1296 return 0;
1297 }
1298 }
1299 /* no index or seeking by index failed */
1300 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1301 return -1;
1302 asf_reset_header(s);
1303 return 0;
1304}
1305
1306AVInputFormat ff_asf_demuxer = {
1307 .name = "asf",
1308 .long_name = NULL_IF_CONFIG_SMALL("ASF format"),
1309 .priv_data_size = sizeof(ASFContext),
1310 .read_probe = asf_probe,
1311 .read_header = asf_read_header,
1312 .read_packet = asf_read_packet,
1313 .read_close = asf_read_close,
1314 .read_seek = asf_read_seek,
1315 .read_timestamp = asf_read_pts,
1316 //.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1317};