b365307137a7d8308423ae88d0d04154de535c48
[libav.git] / libavformat / asf.c
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 #include "avformat.h"
22 #include "riff.h"
23 #include "mpegaudio.h"
24 #include "asf.h"
25 #include "common.h"
26 #include "asfcrypt.h"
27
28 extern void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
29
30 #undef NDEBUG
31 #include <assert.h>
32
33 #define FRAME_HEADER_SIZE 17
34 // Fix Me! FRAME_HEADER_SIZE may be different.
35
36 static const GUID index_guid = {
37 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
38 };
39
40 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
41 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
42 };
43 /**********************************/
44 /* decoding */
45
46 //#define DEBUG
47
48 #ifdef DEBUG
49 #define PRINT_IF_GUID(g,cmp) \
50 if (!memcmp(g, &cmp, sizeof(GUID))) \
51 printf("(GUID: %s) ", #cmp)
52
53 static void print_guid(const GUID *g)
54 {
55 int i;
56 PRINT_IF_GUID(g, asf_header);
57 else PRINT_IF_GUID(g, file_header);
58 else PRINT_IF_GUID(g, stream_header);
59 else PRINT_IF_GUID(g, audio_stream);
60 else PRINT_IF_GUID(g, audio_conceal_none);
61 else PRINT_IF_GUID(g, video_stream);
62 else PRINT_IF_GUID(g, video_conceal_none);
63 else PRINT_IF_GUID(g, command_stream);
64 else PRINT_IF_GUID(g, comment_header);
65 else PRINT_IF_GUID(g, codec_comment_header);
66 else PRINT_IF_GUID(g, codec_comment1_header);
67 else PRINT_IF_GUID(g, data_header);
68 else PRINT_IF_GUID(g, index_guid);
69 else PRINT_IF_GUID(g, head1_guid);
70 else PRINT_IF_GUID(g, head2_guid);
71 else PRINT_IF_GUID(g, my_guid);
72 else PRINT_IF_GUID(g, ext_stream_header);
73 else PRINT_IF_GUID(g, extended_content_header);
74 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
75 else PRINT_IF_GUID(g, ext_stream_audio_stream);
76 else PRINT_IF_GUID(g, metadata_header);
77 else PRINT_IF_GUID(g, stream_bitrate_guid);
78 else
79 printf("(GUID: unknown) ");
80 for(i=0;i<16;i++)
81 printf(" 0x%02x,", (*g)[i]);
82 printf("}\n");
83 }
84 #undef PRINT_IF_GUID
85 #endif
86
87 static void get_guid(ByteIOContext *s, GUID *g)
88 {
89 assert(sizeof(*g) == 16);
90 get_buffer(s, *g, sizeof(*g));
91 }
92
93 #if 0
94 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
95 {
96 int len, c;
97 char *q;
98
99 len = get_le16(pb);
100 q = buf;
101 while (len > 0) {
102 c = get_le16(pb);
103 if ((q - buf) < buf_size - 1)
104 *q++ = c;
105 len--;
106 }
107 *q = '\0';
108 }
109 #endif
110
111 #ifdef CONFIG_MMSH_PROTOCOL
112 static int is_mms(ByteIOContext *pb)
113 {
114 return url_fileno(pb) && url_fileno(pb)->prot &&
115 !strcmp(url_fileno(pb)->prot->name, "mmsh");
116 }
117 #endif
118
119 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
120 {
121 char* q = buf;
122 len /= 2;
123 while (len--) {
124 uint8_t tmp;
125 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
126 }
127 *q = '\0';
128 }
129
130 static int asf_probe(AVProbeData *pd)
131 {
132 /* check file header */
133 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
134 return AVPROBE_SCORE_MAX;
135 else
136 return 0;
137 }
138
139 static int get_value(ByteIOContext *pb, int type){
140 switch(type){
141 case 2: return get_le32(pb);
142 case 3: return get_le32(pb);
143 case 4: return get_le64(pb);
144 case 5: return get_le16(pb);
145 default:return INT_MIN;
146 }
147 }
148
149 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
150 {
151 ASFContext *asf = s->priv_data;
152 GUID g;
153 ByteIOContext *pb = s->pb;
154 AVStream *st;
155 ASFStream *asf_st;
156 int size, i;
157 int64_t gsize;
158 AVRational dar[128];
159 uint32_t bitrate[128];
160
161 memset(dar, 0, sizeof(dar));
162 memset(bitrate, 0, sizeof(bitrate));
163
164 get_guid(pb, &g);
165 if (memcmp(&g, &asf_header, sizeof(GUID)))
166 goto fail;
167 get_le64(pb);
168 get_le32(pb);
169 get_byte(pb);
170 get_byte(pb);
171 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
172 for(;;) {
173 get_guid(pb, &g);
174 gsize = get_le64(pb);
175 #ifdef DEBUG
176 printf("%08"PRIx64": ", url_ftell(pb) - 24);
177 print_guid(&g);
178 printf(" size=0x%"PRIx64"\n", gsize);
179 #endif
180 if (!memcmp(&g, &data_header, sizeof(GUID))) {
181 asf->data_object_offset = url_ftell(pb);
182 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
183 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
184 asf->data_object_size = gsize - 24;
185 } else {
186 asf->data_object_size = (uint64_t)-1;
187 }
188 break;
189 }
190 if (gsize < 24)
191 goto fail;
192 if (!memcmp(&g, &file_header, sizeof(GUID))) {
193 get_guid(pb, &asf->hdr.guid);
194 asf->hdr.file_size = get_le64(pb);
195 asf->hdr.create_time = get_le64(pb);
196 asf->nb_packets = get_le64(pb);
197 asf->hdr.send_time = get_le64(pb);
198 asf->hdr.play_time = get_le64(pb);
199 asf->hdr.preroll = get_le32(pb);
200 asf->hdr.ignore = get_le32(pb);
201 asf->hdr.flags = get_le32(pb);
202 asf->hdr.min_pktsize = get_le32(pb);
203 asf->hdr.max_pktsize = get_le32(pb);
204 asf->hdr.max_bitrate = get_le32(pb);
205 asf->packet_size = asf->hdr.max_pktsize;
206 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
207 int type, type_specific_size, sizeX;
208 uint64_t total_size;
209 unsigned int tag1;
210 int64_t pos1, pos2, start_time;
211 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
212
213 pos1 = url_ftell(pb);
214
215 st = av_new_stream(s, 0);
216 if (!st)
217 goto fail;
218 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
219 asf_st = av_mallocz(sizeof(ASFStream));
220 if (!asf_st)
221 goto fail;
222 st->priv_data = asf_st;
223 start_time = asf->hdr.preroll;
224
225 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
226 st->duration = asf->hdr.send_time /
227 (10000000 / 1000) - start_time;
228 }
229 get_guid(pb, &g);
230
231 test_for_ext_stream_audio = 0;
232 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
233 type = CODEC_TYPE_AUDIO;
234 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
235 type = CODEC_TYPE_VIDEO;
236 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
237 type = CODEC_TYPE_UNKNOWN;
238 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
239 test_for_ext_stream_audio = 1;
240 type = CODEC_TYPE_UNKNOWN;
241 } else {
242 goto fail;
243 }
244 get_guid(pb, &g);
245 total_size = get_le64(pb);
246 type_specific_size = get_le32(pb);
247 get_le32(pb);
248 st->id = get_le16(pb) & 0x7f; /* stream id */
249 // mapping of asf ID to AV stream ID;
250 asf->asfid2avid[st->id] = s->nb_streams - 1;
251
252 get_le32(pb);
253
254 if (test_for_ext_stream_audio) {
255 get_guid(pb, &g);
256 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
257 type = CODEC_TYPE_AUDIO;
258 is_dvr_ms_audio=1;
259 get_guid(pb, &g);
260 get_le32(pb);
261 get_le32(pb);
262 get_le32(pb);
263 get_guid(pb, &g);
264 get_le32(pb);
265 }
266 }
267
268 st->codec->codec_type = type;
269 if (type == CODEC_TYPE_AUDIO) {
270 get_wav_header(pb, st->codec, type_specific_size);
271 if (is_dvr_ms_audio) {
272 // codec_id and codec_tag are unreliable in dvr_ms
273 // files. Set them later by probing stream.
274 st->codec->codec_id = CODEC_ID_NONE;
275 st->codec->codec_tag = 0;
276 }
277 st->need_parsing = AVSTREAM_PARSE_FULL;
278 /* We have to init the frame size at some point .... */
279 pos2 = url_ftell(pb);
280 if (gsize >= (pos2 + 8 - pos1 + 24)) {
281 asf_st->ds_span = get_byte(pb);
282 asf_st->ds_packet_size = get_le16(pb);
283 asf_st->ds_chunk_size = get_le16(pb);
284 get_le16(pb); //ds_data_size
285 get_byte(pb); //ds_silence_data
286 }
287 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
288 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
289 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
290 if (asf_st->ds_span > 1) {
291 if (!asf_st->ds_chunk_size
292 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
293 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
294 asf_st->ds_span = 0; // disable descrambling
295 }
296 switch (st->codec->codec_id) {
297 case CODEC_ID_MP3:
298 st->codec->frame_size = MPA_FRAME_SIZE;
299 break;
300 case CODEC_ID_PCM_S16LE:
301 case CODEC_ID_PCM_S16BE:
302 case CODEC_ID_PCM_U16LE:
303 case CODEC_ID_PCM_U16BE:
304 case CODEC_ID_PCM_S8:
305 case CODEC_ID_PCM_U8:
306 case CODEC_ID_PCM_ALAW:
307 case CODEC_ID_PCM_MULAW:
308 st->codec->frame_size = 1;
309 break;
310 default:
311 /* This is probably wrong, but it prevents a crash later */
312 st->codec->frame_size = 1;
313 break;
314 }
315 } else if (type == CODEC_TYPE_VIDEO) {
316 get_le32(pb);
317 get_le32(pb);
318 get_byte(pb);
319 size = get_le16(pb); /* size */
320 sizeX= get_le32(pb); /* size */
321 st->codec->width = get_le32(pb);
322 st->codec->height = get_le32(pb);
323 /* not available for asf */
324 get_le16(pb); /* panes */
325 st->codec->bits_per_sample = get_le16(pb); /* depth */
326 tag1 = get_le32(pb);
327 url_fskip(pb, 20);
328 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
329 size= sizeX;
330 if (size > 40) {
331 st->codec->extradata_size = size - 40;
332 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
333 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
334 }
335
336 /* Extract palette from extradata if bpp <= 8 */
337 /* This code assumes that extradata contains only palette */
338 /* This is true for all paletted codecs implemented in ffmpeg */
339 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
340 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
341 #ifdef WORDS_BIGENDIAN
342 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
343 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
344 #else
345 memcpy(st->codec->palctrl->palette, st->codec->extradata,
346 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
347 #endif
348 st->codec->palctrl->palette_changed = 1;
349 }
350
351 st->codec->codec_tag = tag1;
352 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
353 if(tag1 == MKTAG('D', 'V', 'R', ' '))
354 st->need_parsing = AVSTREAM_PARSE_FULL;
355 }
356 pos2 = url_ftell(pb);
357 url_fskip(pb, gsize - (pos2 - pos1 + 24));
358 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
359 int len1, len2, len3, len4, len5;
360
361 len1 = get_le16(pb);
362 len2 = get_le16(pb);
363 len3 = get_le16(pb);
364 len4 = get_le16(pb);
365 len5 = get_le16(pb);
366 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
367 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
368 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
369 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
370 url_fskip(pb, len5);
371 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
372 int stream_count = get_le16(pb);
373 int j;
374
375 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
376 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
377 for(j = 0; j < stream_count; j++) {
378 int flags, bitrate, stream_id;
379
380 flags= get_le16(pb);
381 bitrate= get_le32(pb);
382 stream_id= (flags & 0x7f);
383 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
384 asf->stream_bitrates[stream_id]= bitrate;
385 }
386 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
387 int desc_count, i;
388
389 desc_count = get_le16(pb);
390 for(i=0;i<desc_count;i++)
391 {
392 int name_len,value_type,value_len;
393 uint64_t value_num = 0;
394 char name[1024];
395
396 name_len = get_le16(pb);
397 get_str16_nolen(pb, name_len, name, sizeof(name));
398 value_type = get_le16(pb);
399 value_len = get_le16(pb);
400 if ((value_type == 0) || (value_type == 1)) // unicode or byte
401 {
402 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
403 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
404 else if(!strcmp(name,"WM/Year" )) {
405 char year[8];
406 get_str16_nolen(pb, value_len, year, sizeof(year));
407 s->year = atoi(year);
408 }
409 else if(!strcmp(name,"WM/Track") && s->track == 0) {
410 char track[8];
411 get_str16_nolen(pb, value_len, track, sizeof(track));
412 s->track = strtol(track, NULL, 10) + 1;
413 }
414 else if(!strcmp(name,"WM/TrackNumber")) {
415 char track[8];
416 get_str16_nolen(pb, value_len, track, sizeof(track));
417 s->track = strtol(track, NULL, 10);
418 }
419 else url_fskip(pb, value_len);
420 }
421 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
422 {
423 value_num= get_value(pb, value_type);
424 if (!strcmp(name,"WM/Track" ) && s->track == 0) s->track = value_num + 1;
425 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
426 }
427 }
428 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
429 int n, stream_num, name_len, value_len, value_type, value_num;
430 n = get_le16(pb);
431
432 for(i=0;i<n;i++) {
433 char name[1024];
434
435 get_le16(pb); //lang_list_index
436 stream_num= get_le16(pb);
437 name_len= get_le16(pb);
438 value_type= get_le16(pb);
439 value_len= get_le32(pb);
440
441 get_str16_nolen(pb, name_len, name, sizeof(name));
442 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
443 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
444 url_fskip(pb, value_len - 2);
445
446 if(stream_num<128){
447 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
448 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
449 }
450 }
451 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
452 int ext_len, payload_ext_ct, stream_ct;
453 uint32_t ext_d, leak_rate, stream_num;
454 int64_t pos_ex_st;
455 pos_ex_st = url_ftell(pb);
456
457 get_le64(pb); // starttime
458 get_le64(pb); // endtime
459 leak_rate = get_le32(pb); // leak-datarate
460 get_le32(pb); // bucket-datasize
461 get_le32(pb); // init-bucket-fullness
462 get_le32(pb); // alt-leak-datarate
463 get_le32(pb); // alt-bucket-datasize
464 get_le32(pb); // alt-init-bucket-fullness
465 get_le32(pb); // max-object-size
466 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
467 stream_num = get_le16(pb); // stream-num
468 get_le16(pb); // stream-language-id-index
469 get_le64(pb); // avg frametime in 100ns units
470 stream_ct = get_le16(pb); //stream-name-count
471 payload_ext_ct = get_le16(pb); //payload-extension-system-count
472
473 if (stream_num < 128)
474 bitrate[stream_num] = leak_rate;
475
476 for (i=0; i<stream_ct; i++){
477 get_le16(pb);
478 ext_len = get_le16(pb);
479 url_fseek(pb, ext_len, SEEK_CUR);
480 }
481
482 for (i=0; i<payload_ext_ct; i++){
483 get_guid(pb, &g);
484 ext_d=get_le16(pb);
485 ext_len=get_le32(pb);
486 url_fseek(pb, ext_len, SEEK_CUR);
487 }
488
489 // there could be a optional stream properties object to follow
490 // if so the next iteration will pick it up
491 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
492 int v1, v2;
493 get_guid(pb, &g);
494 v1 = get_le32(pb);
495 v2 = get_le16(pb);
496 #if 0
497 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
498 int len, v1, n, num;
499 char str[256], *q;
500 char tag[16];
501
502 get_guid(pb, &g);
503 print_guid(&g);
504
505 n = get_le32(pb);
506 for(i=0;i<n;i++) {
507 num = get_le16(pb); /* stream number */
508 get_str16(pb, str, sizeof(str));
509 get_str16(pb, str, sizeof(str));
510 len = get_le16(pb);
511 q = tag;
512 while (len > 0) {
513 v1 = get_byte(pb);
514 if ((q - tag) < sizeof(tag) - 1)
515 *q++ = v1;
516 len--;
517 }
518 *q = '\0';
519 }
520 #endif
521 } else if (url_feof(pb)) {
522 goto fail;
523 } else {
524 url_fseek(pb, gsize - 24, SEEK_CUR);
525 }
526 }
527 get_guid(pb, &g);
528 get_le64(pb);
529 get_byte(pb);
530 get_byte(pb);
531 if (url_feof(pb))
532 goto fail;
533 asf->data_offset = url_ftell(pb);
534 asf->packet_size_left = 0;
535
536
537 for(i=0; i<128; i++){
538 int stream_num= asf->asfid2avid[i];
539 if(stream_num>=0){
540 AVCodecContext *codec= s->streams[stream_num]->codec;
541 if (!codec->bit_rate)
542 codec->bit_rate = bitrate[i];
543 if (dar[i].num > 0 && dar[i].den > 0)
544 av_reduce(&codec->sample_aspect_ratio.num,
545 &codec->sample_aspect_ratio.den,
546 dar[i].num, dar[i].den, INT_MAX);
547 //av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
548 }
549 }
550
551 #ifdef CONFIG_MMSH_PROTOCOL
552 /* Give info about ourselves to the mms protocol */
553 if(is_mms(pb))
554 ff_mms_set_stream_selection(url_fileno(pb), s);
555 #endif
556
557 return 0;
558
559 fail:
560 for(i=0;i<s->nb_streams;i++) {
561 AVStream *st = s->streams[i];
562 if (st) {
563 av_free(st->priv_data);
564 av_free(st->codec->extradata);
565 }
566 av_free(st);
567 }
568 return -1;
569 }
570
571 #define DO_2BITS(bits, var, defval) \
572 switch (bits & 3) \
573 { \
574 case 3: var = get_le32(pb); rsize += 4; break; \
575 case 2: var = get_le16(pb); rsize += 2; break; \
576 case 1: var = get_byte(pb); rsize++; break; \
577 default: var = defval; break; \
578 }
579
580 /**
581 *
582 * @return <0 in case of an error
583 */
584 static int asf_get_packet(AVFormatContext *s)
585 {
586 ASFContext *asf = s->priv_data;
587 ByteIOContext *pb = s->pb;
588 uint32_t packet_length, padsize;
589 int rsize = 8;
590 int c, d, e, off;
591
592 off= (url_ftell(s->pb) - s->data_offset) % asf->packet_size + 3;
593
594 c=d=e=-1;
595 while(off-- > 0){
596 c=d; d=e;
597 e= get_byte(pb);
598 if(c == 0x82 && !d && !e)
599 break;
600 }
601
602 if (c != 0x82) {
603 if (!url_feof(pb))
604 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
605 }
606 if ((c & 0x8f) == 0x82) {
607 if (d || e) {
608 if (!url_feof(pb))
609 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
610 return -1;
611 }
612 c= get_byte(pb);
613 d= get_byte(pb);
614 rsize+=3;
615 }else{
616 url_fseek(pb, -1, SEEK_CUR); //FIXME
617 }
618
619 asf->packet_flags = c;
620 asf->packet_property = d;
621
622 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
623 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
624 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
625
626 //the following checks prevent overflows and infinite loops
627 if(packet_length >= (1U<<29)){
628 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
629 return -1;
630 }
631 if(padsize >= packet_length){
632 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
633 return -1;
634 }
635
636 asf->packet_timestamp = get_le32(pb);
637 get_le16(pb); /* duration */
638 // rsize has at least 11 bytes which have to be present
639
640 if (asf->packet_flags & 0x01) {
641 asf->packet_segsizetype = get_byte(pb); rsize++;
642 asf->packet_segments = asf->packet_segsizetype & 0x3f;
643 } else {
644 asf->packet_segments = 1;
645 asf->packet_segsizetype = 0x80;
646 }
647 asf->packet_size_left = packet_length - padsize - rsize;
648 if (packet_length < asf->hdr.min_pktsize)
649 padsize += asf->hdr.min_pktsize - packet_length;
650 asf->packet_padsize = padsize;
651 #ifdef DEBUG
652 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
653 #endif
654 return 0;
655 }
656
657 /**
658 *
659 * @return <0 if error
660 */
661 static int asf_read_frame_header(AVFormatContext *s){
662 ASFContext *asf = s->priv_data;
663 ByteIOContext *pb = s->pb;
664 int rsize = 1;
665 int num = get_byte(pb);
666 int64_t ts0, ts1;
667
668 asf->packet_segments--;
669 asf->packet_key_frame = num >> 7;
670 asf->stream_index = asf->asfid2avid[num & 0x7f];
671 // sequence should be ignored!
672 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
673 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
674 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
675 //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);
676 if (asf->packet_replic_size >= 8) {
677 asf->packet_obj_size = get_le32(pb);
678 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
679 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
680 return -1;
681 }
682 asf->packet_frag_timestamp = get_le32(pb); // timestamp
683 if(asf->packet_replic_size >= 8+38+4){
684 // for(i=0; i<asf->packet_replic_size-8; i++)
685 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
686 // av_log(s, AV_LOG_DEBUG, "\n");
687 url_fskip(pb, 10);
688 ts0= get_le64(pb);
689 ts1= get_le64(pb);
690 url_fskip(pb, 12);
691 get_le32(pb);
692 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
693 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
694 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
695 }else
696 url_fskip(pb, asf->packet_replic_size - 8);
697 rsize += asf->packet_replic_size; // FIXME - check validity
698 } else if (asf->packet_replic_size==1){
699 // multipacket - frag_offset is beginning timestamp
700 asf->packet_time_start = asf->packet_frag_offset;
701 asf->packet_frag_offset = 0;
702 asf->packet_frag_timestamp = asf->packet_timestamp;
703
704 asf->packet_time_delta = get_byte(pb);
705 rsize++;
706 }else if(asf->packet_replic_size!=0){
707 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
708 return -1;
709 }
710 if (asf->packet_flags & 0x01) {
711 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
712 if(asf->packet_frag_size > asf->packet_size_left - rsize){
713 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
714 return -1;
715 }
716 //printf("Fragsize %d\n", asf->packet_frag_size);
717 } else {
718 asf->packet_frag_size = asf->packet_size_left - rsize;
719 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
720 }
721 if (asf->packet_replic_size == 1) {
722 asf->packet_multi_size = asf->packet_frag_size;
723 if (asf->packet_multi_size > asf->packet_size_left)
724 return -1;
725 }
726 asf->packet_size_left -= rsize;
727 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
728
729 return 0;
730 }
731
732 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
733 {
734 ASFContext *asf = s->priv_data;
735 ASFStream *asf_st = 0;
736 ByteIOContext *pb = s->pb;
737 //static int pc = 0;
738 for (;;) {
739 if(url_feof(pb))
740 return AVERROR(EIO);
741 if (asf->packet_size_left < FRAME_HEADER_SIZE
742 || asf->packet_segments < 1) {
743 //asf->packet_size_left <= asf->packet_padsize) {
744 int ret = asf->packet_size_left + asf->packet_padsize;
745 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
746 assert(ret>=0);
747 /* fail safe */
748 url_fskip(pb, ret);
749
750 asf->packet_pos= url_ftell(s->pb);
751 if (asf->data_object_size != (uint64_t)-1 &&
752 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
753 return AVERROR(EIO); /* Do not exceed the size of the data object */
754 ret = asf_get_packet(s);
755 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
756 if (ret < 0)
757 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
758 asf->packet_time_start = 0;
759 continue;
760 }
761 if (asf->packet_time_start == 0) {
762 if(asf_read_frame_header(s) < 0){
763 asf->packet_segments= 0;
764 continue;
765 }
766 if (asf->stream_index < 0
767 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
768 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
769 ) {
770 asf->packet_time_start = 0;
771 /* unhandled packet (should not happen) */
772 url_fskip(pb, asf->packet_frag_size);
773 asf->packet_size_left -= asf->packet_frag_size;
774 if(asf->stream_index < 0)
775 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
776 continue;
777 }
778 asf->asf_st = s->streams[asf->stream_index]->priv_data;
779 }
780 asf_st = asf->asf_st;
781
782 if (asf->packet_replic_size == 1) {
783 // frag_offset is here used as the beginning timestamp
784 asf->packet_frag_timestamp = asf->packet_time_start;
785 asf->packet_time_start += asf->packet_time_delta;
786 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
787 asf->packet_size_left--;
788 asf->packet_multi_size--;
789 if (asf->packet_multi_size < asf->packet_obj_size)
790 {
791 asf->packet_time_start = 0;
792 url_fskip(pb, asf->packet_multi_size);
793 asf->packet_size_left -= asf->packet_multi_size;
794 continue;
795 }
796 asf->packet_multi_size -= asf->packet_obj_size;
797 //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);
798 }
799 if( /*asf->packet_frag_size == asf->packet_obj_size*/
800 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
801 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
802 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
803 asf_st->frag_offset, asf->packet_frag_size,
804 asf->packet_obj_size, asf_st->pkt.size);
805 asf->packet_obj_size= asf_st->pkt.size;
806 }
807
808 if ( asf_st->pkt.size != asf->packet_obj_size
809 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
810 if(asf_st->pkt.data){
811 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
812 asf_st->frag_offset = 0;
813 av_free_packet(&asf_st->pkt);
814 }
815 /* new packet */
816 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
817 asf_st->seq = asf->packet_seq;
818 asf_st->pkt.pts = asf->packet_frag_timestamp;
819 asf_st->pkt.stream_index = asf->stream_index;
820 asf_st->pkt.pos =
821 asf_st->packet_pos= asf->packet_pos;
822 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
823 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
824 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
825 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
826 asf->packet_key_frame = 1;
827 if (asf->packet_key_frame)
828 asf_st->pkt.flags |= PKT_FLAG_KEY;
829 }
830
831 /* read data */
832 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
833 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
834 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
835 asf->packet_size_left -= asf->packet_frag_size;
836 if (asf->packet_size_left < 0)
837 continue;
838
839 if( asf->packet_frag_offset >= asf_st->pkt.size
840 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
841 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
842 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
843 continue;
844 }
845
846 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
847 asf->packet_frag_size);
848 if (s->key && s->keylen == 20)
849 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
850 asf->packet_frag_size);
851 asf_st->frag_offset += asf->packet_frag_size;
852 /* test if whole packet is read */
853 if (asf_st->frag_offset == asf_st->pkt.size) {
854 //workaround for macroshit radio DVR-MS files
855 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
856 && asf_st->pkt.size > 100){
857 int i;
858 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
859 if(i == asf_st->pkt.size){
860 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
861 asf_st->frag_offset = 0;
862 av_free_packet(&asf_st->pkt);
863 continue;
864 }
865 }
866
867 /* return packet */
868 if (asf_st->ds_span > 1) {
869 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
870 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);
871 }else{
872 /* packet descrambling */
873 uint8_t *newdata = av_malloc(asf_st->pkt.size);
874 if (newdata) {
875 int offset = 0;
876 while (offset < asf_st->pkt.size) {
877 int off = offset / asf_st->ds_chunk_size;
878 int row = off / asf_st->ds_span;
879 int col = off % asf_st->ds_span;
880 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
881 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
882
883 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
884 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
885 memcpy(newdata + offset,
886 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
887 asf_st->ds_chunk_size);
888 offset += asf_st->ds_chunk_size;
889 }
890 av_free(asf_st->pkt.data);
891 asf_st->pkt.data = newdata;
892 }
893 }
894 }
895 asf_st->frag_offset = 0;
896 *pkt= asf_st->pkt;
897 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
898 asf_st->pkt.size = 0;
899 asf_st->pkt.data = 0;
900 break; // packet completed
901 }
902 }
903 return 0;
904 }
905
906 // Added to support seeking after packets have been read
907 // If information is not reset, read_packet fails due to
908 // leftover information from previous reads
909 static void asf_reset_header(AVFormatContext *s)
910 {
911 ASFContext *asf = s->priv_data;
912 ASFStream *asf_st;
913 int i;
914
915 asf->packet_nb_frames = 0;
916 asf->packet_size_left = 0;
917 asf->packet_segments = 0;
918 asf->packet_flags = 0;
919 asf->packet_property = 0;
920 asf->packet_timestamp = 0;
921 asf->packet_segsizetype = 0;
922 asf->packet_segments = 0;
923 asf->packet_seq = 0;
924 asf->packet_replic_size = 0;
925 asf->packet_key_frame = 0;
926 asf->packet_padsize = 0;
927 asf->packet_frag_offset = 0;
928 asf->packet_frag_size = 0;
929 asf->packet_frag_timestamp = 0;
930 asf->packet_multi_size = 0;
931 asf->packet_obj_size = 0;
932 asf->packet_time_delta = 0;
933 asf->packet_time_start = 0;
934
935 for(i=0; i<s->nb_streams; i++){
936 asf_st= s->streams[i]->priv_data;
937 av_free_packet(&asf_st->pkt);
938 asf_st->frag_offset=0;
939 asf_st->seq=0;
940 }
941 asf->asf_st= NULL;
942 }
943
944 static int asf_read_close(AVFormatContext *s)
945 {
946 int i;
947
948 asf_reset_header(s);
949 for(i=0;i<s->nb_streams;i++) {
950 AVStream *st = s->streams[i];
951 av_free(st->priv_data);
952 av_free(st->codec->palctrl);
953 }
954 return 0;
955 }
956
957 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
958 {
959 ASFContext *asf = s->priv_data;
960 AVPacket pkt1, *pkt = &pkt1;
961 ASFStream *asf_st;
962 int64_t pts;
963 int64_t pos= *ppos;
964 int i;
965 int64_t start_pos[s->nb_streams];
966
967 for(i=0; i<s->nb_streams; i++){
968 start_pos[i]= pos;
969 }
970
971 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
972 *ppos= pos;
973 url_fseek(s->pb, pos, SEEK_SET);
974
975 //printf("asf_read_pts\n");
976 asf_reset_header(s);
977 for(;;){
978 if (av_read_frame(s, pkt) < 0){
979 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
980 return AV_NOPTS_VALUE;
981 }
982
983 pts= pkt->pts;
984
985 av_free_packet(pkt);
986 if(pkt->flags&PKT_FLAG_KEY){
987 i= pkt->stream_index;
988
989 asf_st= s->streams[i]->priv_data;
990
991 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
992 pos= asf_st->packet_pos;
993
994 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
995 start_pos[i]= asf_st->packet_pos + 1;
996
997 if(pkt->stream_index == stream_index)
998 break;
999 }
1000 }
1001
1002 *ppos= pos;
1003 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1004
1005 return pts;
1006 }
1007
1008 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1009 {
1010 GUID g;
1011 ASFContext *asf = s->priv_data;
1012 int64_t gsize, itime;
1013 int64_t pos, current_pos, index_pts;
1014 int i;
1015 int pct,ict;
1016
1017 current_pos = url_ftell(s->pb);
1018
1019 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1020 get_guid(s->pb, &g);
1021 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1022 gsize = get_le64(s->pb);
1023 get_guid(s->pb, &g);
1024 itime=get_le64(s->pb);
1025 pct=get_le32(s->pb);
1026 ict=get_le32(s->pb);
1027 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1028
1029 for (i=0;i<ict;i++){
1030 int pktnum=get_le32(s->pb);
1031 int pktct =get_le16(s->pb);
1032 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1033
1034 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1035 index_pts=av_rescale(itime, i, 10000);
1036
1037 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1038 }
1039 asf->index_read= 1;
1040 }
1041 url_fseek(s->pb, current_pos, SEEK_SET);
1042 }
1043
1044 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1045 {
1046 ASFContext *asf = s->priv_data;
1047 AVStream *st = s->streams[stream_index];
1048 int64_t pos;
1049 int index;
1050
1051 if (asf->packet_size <= 0)
1052 return -1;
1053
1054 /* Try using the protocol's read_seek if available */
1055 if(s->pb) {
1056 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1057 if(ret >= 0)
1058 asf_reset_header(s);
1059 if (ret != AVERROR(ENOSYS))
1060 return ret;
1061 }
1062
1063 if (!asf->index_read)
1064 asf_build_simple_index(s, stream_index);
1065
1066 if(!(asf->index_read && st->index_entries)){
1067 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1068 return -1;
1069 }else{
1070 index= av_index_search_timestamp(st, pts, flags);
1071 if(index<0)
1072 return -1;
1073
1074 /* find the position */
1075 pos = st->index_entries[index].pos;
1076 pts = st->index_entries[index].timestamp;
1077
1078 // various attempts to find key frame have failed so far
1079 // asf_reset_header(s);
1080 // url_fseek(s->pb, pos, SEEK_SET);
1081 // key_pos = pos;
1082 // for(i=0;i<16;i++){
1083 // pos = url_ftell(s->pb);
1084 // if (av_read_frame(s, &pkt) < 0){
1085 // av_log(s, AV_LOG_INFO, "seek failed\n");
1086 // return -1;
1087 // }
1088 // asf_st = s->streams[stream_index]->priv_data;
1089 // pos += st->parser->frame_offset;
1090 //
1091 // if (pkt.size > b) {
1092 // b = pkt.size;
1093 // key_pos = pos;
1094 // }
1095 //
1096 // av_free_packet(&pkt);
1097 // }
1098
1099 /* do the seek */
1100 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1101 url_fseek(s->pb, pos, SEEK_SET);
1102 }
1103 asf_reset_header(s);
1104 return 0;
1105 }
1106
1107 AVInputFormat asf_demuxer = {
1108 "asf",
1109 "asf format",
1110 sizeof(ASFContext),
1111 asf_probe,
1112 asf_read_header,
1113 asf_read_packet,
1114 asf_read_close,
1115 asf_read_seek,
1116 asf_read_pts,
1117 };