ae84ba225331ea1e031305087a3ab815cfa0267f
[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 static int is_mms(ByteIOContext *pb)
112 {
113 return url_fileno(pb) && url_fileno(pb)->prot &&
114 !strcmp(url_fileno(pb)->prot->name, "mmsh");
115 }
116
117 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
118 {
119 char* q = buf;
120 len /= 2;
121 while (len--) {
122 uint8_t tmp;
123 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
124 }
125 *q = '\0';
126 }
127
128 static int asf_probe(AVProbeData *pd)
129 {
130 /* check file header */
131 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
132 return AVPROBE_SCORE_MAX;
133 else
134 return 0;
135 }
136
137 static int get_value(ByteIOContext *pb, int type){
138 switch(type){
139 case 2: return get_le32(pb);
140 case 3: return get_le32(pb);
141 case 4: return get_le64(pb);
142 case 5: return get_le16(pb);
143 default:return INT_MIN;
144 }
145 }
146
147 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
148 {
149 ASFContext *asf = s->priv_data;
150 GUID g;
151 ByteIOContext *pb = s->pb;
152 AVStream *st;
153 ASFStream *asf_st;
154 int size, i;
155 int64_t gsize;
156 AVRational dar[128];
157 uint32_t bitrate[128];
158
159 memset(dar, 0, sizeof(dar));
160 memset(bitrate, 0, sizeof(bitrate));
161
162 get_guid(pb, &g);
163 if (memcmp(&g, &asf_header, sizeof(GUID)))
164 goto fail;
165 get_le64(pb);
166 get_le32(pb);
167 get_byte(pb);
168 get_byte(pb);
169 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
170 for(;;) {
171 get_guid(pb, &g);
172 gsize = get_le64(pb);
173 #ifdef DEBUG
174 printf("%08"PRIx64": ", url_ftell(pb) - 24);
175 print_guid(&g);
176 printf(" size=0x%"PRIx64"\n", gsize);
177 #endif
178 if (!memcmp(&g, &data_header, sizeof(GUID))) {
179 asf->data_object_offset = url_ftell(pb);
180 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
181 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
182 asf->data_object_size = gsize - 24;
183 } else {
184 asf->data_object_size = (uint64_t)-1;
185 }
186 break;
187 }
188 if (gsize < 24)
189 goto fail;
190 if (!memcmp(&g, &file_header, sizeof(GUID))) {
191 get_guid(pb, &asf->hdr.guid);
192 asf->hdr.file_size = get_le64(pb);
193 asf->hdr.create_time = get_le64(pb);
194 asf->nb_packets = get_le64(pb);
195 asf->hdr.send_time = get_le64(pb);
196 asf->hdr.play_time = get_le64(pb);
197 asf->hdr.preroll = get_le32(pb);
198 asf->hdr.ignore = get_le32(pb);
199 asf->hdr.flags = get_le32(pb);
200 asf->hdr.min_pktsize = get_le32(pb);
201 asf->hdr.max_pktsize = get_le32(pb);
202 asf->hdr.max_bitrate = get_le32(pb);
203 asf->packet_size = asf->hdr.max_pktsize;
204 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
205 int type, type_specific_size, sizeX;
206 uint64_t total_size;
207 unsigned int tag1;
208 int64_t pos1, pos2, start_time;
209 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
210
211 pos1 = url_ftell(pb);
212
213 st = av_new_stream(s, 0);
214 if (!st)
215 goto fail;
216 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
217 asf_st = av_mallocz(sizeof(ASFStream));
218 if (!asf_st)
219 goto fail;
220 st->priv_data = asf_st;
221 start_time = asf->hdr.preroll;
222
223 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
224 st->duration = asf->hdr.send_time /
225 (10000000 / 1000) - start_time;
226 }
227 get_guid(pb, &g);
228
229 test_for_ext_stream_audio = 0;
230 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
231 type = CODEC_TYPE_AUDIO;
232 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
233 type = CODEC_TYPE_VIDEO;
234 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
235 type = CODEC_TYPE_UNKNOWN;
236 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
237 test_for_ext_stream_audio = 1;
238 type = CODEC_TYPE_UNKNOWN;
239 } else {
240 goto fail;
241 }
242 get_guid(pb, &g);
243 total_size = get_le64(pb);
244 type_specific_size = get_le32(pb);
245 get_le32(pb);
246 st->id = get_le16(pb) & 0x7f; /* stream id */
247 // mapping of asf ID to AV stream ID;
248 asf->asfid2avid[st->id] = s->nb_streams - 1;
249
250 get_le32(pb);
251
252 if (test_for_ext_stream_audio) {
253 get_guid(pb, &g);
254 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
255 type = CODEC_TYPE_AUDIO;
256 is_dvr_ms_audio=1;
257 get_guid(pb, &g);
258 get_le32(pb);
259 get_le32(pb);
260 get_le32(pb);
261 get_guid(pb, &g);
262 get_le32(pb);
263 }
264 }
265
266 st->codec->codec_type = type;
267 if (type == CODEC_TYPE_AUDIO) {
268 get_wav_header(pb, st->codec, type_specific_size);
269 if (is_dvr_ms_audio) {
270 // codec_id and codec_tag are unreliable in dvr_ms
271 // files. Set them later by probing stream.
272 st->codec->codec_id = CODEC_ID_NONE;
273 st->codec->codec_tag = 0;
274 }
275 st->need_parsing = AVSTREAM_PARSE_FULL;
276 /* We have to init the frame size at some point .... */
277 pos2 = url_ftell(pb);
278 if (gsize >= (pos2 + 8 - pos1 + 24)) {
279 asf_st->ds_span = get_byte(pb);
280 asf_st->ds_packet_size = get_le16(pb);
281 asf_st->ds_chunk_size = get_le16(pb);
282 get_le16(pb); //ds_data_size
283 get_byte(pb); //ds_silence_data
284 }
285 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
286 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
287 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
288 if (asf_st->ds_span > 1) {
289 if (!asf_st->ds_chunk_size
290 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
291 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
292 asf_st->ds_span = 0; // disable descrambling
293 }
294 switch (st->codec->codec_id) {
295 case CODEC_ID_MP3:
296 st->codec->frame_size = MPA_FRAME_SIZE;
297 break;
298 case CODEC_ID_PCM_S16LE:
299 case CODEC_ID_PCM_S16BE:
300 case CODEC_ID_PCM_U16LE:
301 case CODEC_ID_PCM_U16BE:
302 case CODEC_ID_PCM_S8:
303 case CODEC_ID_PCM_U8:
304 case CODEC_ID_PCM_ALAW:
305 case CODEC_ID_PCM_MULAW:
306 st->codec->frame_size = 1;
307 break;
308 default:
309 /* This is probably wrong, but it prevents a crash later */
310 st->codec->frame_size = 1;
311 break;
312 }
313 } else if (type == CODEC_TYPE_VIDEO) {
314 get_le32(pb);
315 get_le32(pb);
316 get_byte(pb);
317 size = get_le16(pb); /* size */
318 sizeX= get_le32(pb); /* size */
319 st->codec->width = get_le32(pb);
320 st->codec->height = get_le32(pb);
321 /* not available for asf */
322 get_le16(pb); /* panes */
323 st->codec->bits_per_sample = get_le16(pb); /* depth */
324 tag1 = get_le32(pb);
325 url_fskip(pb, 20);
326 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
327 size= sizeX;
328 if (size > 40) {
329 st->codec->extradata_size = size - 40;
330 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
331 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
332 }
333
334 /* Extract palette from extradata if bpp <= 8 */
335 /* This code assumes that extradata contains only palette */
336 /* This is true for all paletted codecs implemented in ffmpeg */
337 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
338 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
339 #ifdef WORDS_BIGENDIAN
340 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
341 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
342 #else
343 memcpy(st->codec->palctrl->palette, st->codec->extradata,
344 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
345 #endif
346 st->codec->palctrl->palette_changed = 1;
347 }
348
349 st->codec->codec_tag = tag1;
350 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
351 if(tag1 == MKTAG('D', 'V', 'R', ' '))
352 st->need_parsing = AVSTREAM_PARSE_FULL;
353 }
354 pos2 = url_ftell(pb);
355 url_fskip(pb, gsize - (pos2 - pos1 + 24));
356 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
357 int len1, len2, len3, len4, len5;
358
359 len1 = get_le16(pb);
360 len2 = get_le16(pb);
361 len3 = get_le16(pb);
362 len4 = get_le16(pb);
363 len5 = get_le16(pb);
364 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
365 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
366 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
367 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
368 url_fskip(pb, len5);
369 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
370 int stream_count = get_le16(pb);
371 int j;
372
373 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
374 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
375 for(j = 0; j < stream_count; j++) {
376 int flags, bitrate, stream_id;
377
378 flags= get_le16(pb);
379 bitrate= get_le32(pb);
380 stream_id= (flags & 0x7f);
381 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
382 asf->stream_bitrates[stream_id]= bitrate;
383 }
384 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
385 int desc_count, i;
386
387 desc_count = get_le16(pb);
388 for(i=0;i<desc_count;i++)
389 {
390 int name_len,value_type,value_len;
391 uint64_t value_num = 0;
392 char name[1024];
393
394 name_len = get_le16(pb);
395 get_str16_nolen(pb, name_len, name, sizeof(name));
396 value_type = get_le16(pb);
397 value_len = get_le16(pb);
398 if ((value_type == 0) || (value_type == 1)) // unicode or byte
399 {
400 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
401 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
402 else if(!strcmp(name,"WM/Year" )) {
403 char year[8];
404 get_str16_nolen(pb, value_len, year, sizeof(year));
405 s->year = atoi(year);
406 }
407 else if(!strcmp(name,"WM/Track") && s->track == 0) {
408 char track[8];
409 get_str16_nolen(pb, value_len, track, sizeof(track));
410 s->track = strtol(track, NULL, 10) + 1;
411 }
412 else if(!strcmp(name,"WM/TrackNumber")) {
413 char track[8];
414 get_str16_nolen(pb, value_len, track, sizeof(track));
415 s->track = strtol(track, NULL, 10);
416 }
417 else url_fskip(pb, value_len);
418 }
419 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
420 {
421 value_num= get_value(pb, value_type);
422 if (!strcmp(name,"WM/Track" ) && s->track == 0) s->track = value_num + 1;
423 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
424 }
425 }
426 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
427 int n, stream_num, name_len, value_len, value_type, value_num;
428 n = get_le16(pb);
429
430 for(i=0;i<n;i++) {
431 char name[1024];
432
433 get_le16(pb); //lang_list_index
434 stream_num= get_le16(pb);
435 name_len= get_le16(pb);
436 value_type= get_le16(pb);
437 value_len= get_le32(pb);
438
439 get_str16_nolen(pb, name_len, name, sizeof(name));
440 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
441 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
442 url_fskip(pb, value_len - 2);
443
444 if(stream_num<128){
445 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
446 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
447 }
448 }
449 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
450 int ext_len, payload_ext_ct, stream_ct;
451 uint32_t ext_d, leak_rate, stream_num;
452 int64_t pos_ex_st;
453 pos_ex_st = url_ftell(pb);
454
455 get_le64(pb); // starttime
456 get_le64(pb); // endtime
457 leak_rate = get_le32(pb); // leak-datarate
458 get_le32(pb); // bucket-datasize
459 get_le32(pb); // init-bucket-fullness
460 get_le32(pb); // alt-leak-datarate
461 get_le32(pb); // alt-bucket-datasize
462 get_le32(pb); // alt-init-bucket-fullness
463 get_le32(pb); // max-object-size
464 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
465 stream_num = get_le16(pb); // stream-num
466 get_le16(pb); // stream-language-id-index
467 get_le64(pb); // avg frametime in 100ns units
468 stream_ct = get_le16(pb); //stream-name-count
469 payload_ext_ct = get_le16(pb); //payload-extension-system-count
470
471 if (stream_num < 128)
472 bitrate[stream_num] = leak_rate;
473
474 for (i=0; i<stream_ct; i++){
475 get_le16(pb);
476 ext_len = get_le16(pb);
477 url_fseek(pb, ext_len, SEEK_CUR);
478 }
479
480 for (i=0; i<payload_ext_ct; i++){
481 get_guid(pb, &g);
482 ext_d=get_le16(pb);
483 ext_len=get_le32(pb);
484 url_fseek(pb, ext_len, SEEK_CUR);
485 }
486
487 // there could be a optional stream properties object to follow
488 // if so the next iteration will pick it up
489 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
490 int v1, v2;
491 get_guid(pb, &g);
492 v1 = get_le32(pb);
493 v2 = get_le16(pb);
494 #if 0
495 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
496 int len, v1, n, num;
497 char str[256], *q;
498 char tag[16];
499
500 get_guid(pb, &g);
501 print_guid(&g);
502
503 n = get_le32(pb);
504 for(i=0;i<n;i++) {
505 num = get_le16(pb); /* stream number */
506 get_str16(pb, str, sizeof(str));
507 get_str16(pb, str, sizeof(str));
508 len = get_le16(pb);
509 q = tag;
510 while (len > 0) {
511 v1 = get_byte(pb);
512 if ((q - tag) < sizeof(tag) - 1)
513 *q++ = v1;
514 len--;
515 }
516 *q = '\0';
517 }
518 #endif
519 } else if (url_feof(pb)) {
520 goto fail;
521 } else {
522 url_fseek(pb, gsize - 24, SEEK_CUR);
523 }
524 }
525 get_guid(pb, &g);
526 get_le64(pb);
527 get_byte(pb);
528 get_byte(pb);
529 if (url_feof(pb))
530 goto fail;
531 asf->data_offset = url_ftell(pb);
532 asf->packet_size_left = 0;
533
534
535 for(i=0; i<128; i++){
536 int stream_num= asf->asfid2avid[i];
537 if(stream_num>=0){
538 AVCodecContext *codec= s->streams[stream_num]->codec;
539 if (!codec->bit_rate)
540 codec->bit_rate = bitrate[i];
541 if (dar[i].num > 0 && dar[i].den > 0)
542 av_reduce(&codec->sample_aspect_ratio.num,
543 &codec->sample_aspect_ratio.den,
544 dar[i].num, dar[i].den, INT_MAX);
545 //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);
546 }
547 }
548
549 #ifdef CONFIG_MMSH_PROTOCOL
550 /* Give info about ourselves to the mms protocol */
551 if(is_mms(pb))
552 ff_mms_set_stream_selection(url_fileno(pb), s);
553 #endif
554
555 return 0;
556
557 fail:
558 for(i=0;i<s->nb_streams;i++) {
559 AVStream *st = s->streams[i];
560 if (st) {
561 av_free(st->priv_data);
562 av_free(st->codec->extradata);
563 }
564 av_free(st);
565 }
566 return -1;
567 }
568
569 #define DO_2BITS(bits, var, defval) \
570 switch (bits & 3) \
571 { \
572 case 3: var = get_le32(pb); rsize += 4; break; \
573 case 2: var = get_le16(pb); rsize += 2; break; \
574 case 1: var = get_byte(pb); rsize++; break; \
575 default: var = defval; break; \
576 }
577
578 /**
579 *
580 * @return <0 in case of an error
581 */
582 static int asf_get_packet(AVFormatContext *s)
583 {
584 ASFContext *asf = s->priv_data;
585 ByteIOContext *pb = s->pb;
586 uint32_t packet_length, padsize;
587 int rsize = 8;
588 int c, d, e, off;
589
590 off= (url_ftell(s->pb) - s->data_offset) % asf->packet_size + 3;
591
592 c=d=e=-1;
593 while(off-- > 0){
594 c=d; d=e;
595 e= get_byte(pb);
596 if(c == 0x82 && !d && !e)
597 break;
598 }
599
600 if (c != 0x82) {
601 if (!url_feof(pb))
602 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
603 }
604 if ((c & 0x8f) == 0x82) {
605 if (d || e) {
606 if (!url_feof(pb))
607 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
608 return -1;
609 }
610 c= get_byte(pb);
611 d= get_byte(pb);
612 rsize+=3;
613 }else{
614 url_fseek(pb, -1, SEEK_CUR); //FIXME
615 }
616
617 asf->packet_flags = c;
618 asf->packet_property = d;
619
620 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
621 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
622 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
623
624 //the following checks prevent overflows and infinite loops
625 if(packet_length >= (1U<<29)){
626 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
627 return -1;
628 }
629 if(padsize >= packet_length){
630 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
631 return -1;
632 }
633
634 asf->packet_timestamp = get_le32(pb);
635 get_le16(pb); /* duration */
636 // rsize has at least 11 bytes which have to be present
637
638 if (asf->packet_flags & 0x01) {
639 asf->packet_segsizetype = get_byte(pb); rsize++;
640 asf->packet_segments = asf->packet_segsizetype & 0x3f;
641 } else {
642 asf->packet_segments = 1;
643 asf->packet_segsizetype = 0x80;
644 }
645 asf->packet_size_left = packet_length - padsize - rsize;
646 if (packet_length < asf->hdr.min_pktsize)
647 padsize += asf->hdr.min_pktsize - packet_length;
648 asf->packet_padsize = padsize;
649 #ifdef DEBUG
650 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
651 #endif
652 return 0;
653 }
654
655 /**
656 *
657 * @return <0 if error
658 */
659 static int asf_read_frame_header(AVFormatContext *s){
660 ASFContext *asf = s->priv_data;
661 ByteIOContext *pb = s->pb;
662 int rsize = 1;
663 int num = get_byte(pb);
664 int64_t ts0, ts1;
665
666 asf->packet_segments--;
667 asf->packet_key_frame = num >> 7;
668 asf->stream_index = asf->asfid2avid[num & 0x7f];
669 // sequence should be ignored!
670 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
671 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
672 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
673 //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);
674 if (asf->packet_replic_size >= 8) {
675 asf->packet_obj_size = get_le32(pb);
676 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
677 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
678 return -1;
679 }
680 asf->packet_frag_timestamp = get_le32(pb); // timestamp
681 if(asf->packet_replic_size >= 8+38+4){
682 // for(i=0; i<asf->packet_replic_size-8; i++)
683 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
684 // av_log(s, AV_LOG_DEBUG, "\n");
685 url_fskip(pb, 10);
686 ts0= get_le64(pb);
687 ts1= get_le64(pb);
688 url_fskip(pb, 12);
689 get_le32(pb);
690 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
691 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
692 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
693 }else
694 url_fskip(pb, asf->packet_replic_size - 8);
695 rsize += asf->packet_replic_size; // FIXME - check validity
696 } else if (asf->packet_replic_size==1){
697 // multipacket - frag_offset is beginning timestamp
698 asf->packet_time_start = asf->packet_frag_offset;
699 asf->packet_frag_offset = 0;
700 asf->packet_frag_timestamp = asf->packet_timestamp;
701
702 asf->packet_time_delta = get_byte(pb);
703 rsize++;
704 }else if(asf->packet_replic_size!=0){
705 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
706 return -1;
707 }
708 if (asf->packet_flags & 0x01) {
709 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
710 if(asf->packet_frag_size > asf->packet_size_left - rsize){
711 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
712 return -1;
713 }
714 //printf("Fragsize %d\n", asf->packet_frag_size);
715 } else {
716 asf->packet_frag_size = asf->packet_size_left - rsize;
717 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
718 }
719 if (asf->packet_replic_size == 1) {
720 asf->packet_multi_size = asf->packet_frag_size;
721 if (asf->packet_multi_size > asf->packet_size_left)
722 return -1;
723 }
724 asf->packet_size_left -= rsize;
725 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
726
727 return 0;
728 }
729
730 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
731 {
732 ASFContext *asf = s->priv_data;
733 ASFStream *asf_st = 0;
734 ByteIOContext *pb = s->pb;
735 //static int pc = 0;
736 for (;;) {
737 if(url_feof(pb))
738 return AVERROR(EIO);
739 if (asf->packet_size_left < FRAME_HEADER_SIZE
740 || asf->packet_segments < 1) {
741 //asf->packet_size_left <= asf->packet_padsize) {
742 int ret = asf->packet_size_left + asf->packet_padsize;
743 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
744 assert(ret>=0);
745 /* fail safe */
746 url_fskip(pb, ret);
747
748 asf->packet_pos= url_ftell(s->pb);
749 if (asf->data_object_size != (uint64_t)-1 &&
750 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
751 return AVERROR(EIO); /* Do not exceed the size of the data object */
752 ret = asf_get_packet(s);
753 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
754 if (ret < 0)
755 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
756 asf->packet_time_start = 0;
757 continue;
758 }
759 if (asf->packet_time_start == 0) {
760 if(asf_read_frame_header(s) < 0){
761 asf->packet_segments= 0;
762 continue;
763 }
764 if (asf->stream_index < 0
765 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
766 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
767 ) {
768 asf->packet_time_start = 0;
769 /* unhandled packet (should not happen) */
770 url_fskip(pb, asf->packet_frag_size);
771 asf->packet_size_left -= asf->packet_frag_size;
772 if(asf->stream_index < 0)
773 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
774 continue;
775 }
776 asf->asf_st = s->streams[asf->stream_index]->priv_data;
777 }
778 asf_st = asf->asf_st;
779
780 if (asf->packet_replic_size == 1) {
781 // frag_offset is here used as the beginning timestamp
782 asf->packet_frag_timestamp = asf->packet_time_start;
783 asf->packet_time_start += asf->packet_time_delta;
784 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
785 asf->packet_size_left--;
786 asf->packet_multi_size--;
787 if (asf->packet_multi_size < asf->packet_obj_size)
788 {
789 asf->packet_time_start = 0;
790 url_fskip(pb, asf->packet_multi_size);
791 asf->packet_size_left -= asf->packet_multi_size;
792 continue;
793 }
794 asf->packet_multi_size -= asf->packet_obj_size;
795 //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);
796 }
797 if( /*asf->packet_frag_size == asf->packet_obj_size*/
798 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
799 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
800 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
801 asf_st->frag_offset, asf->packet_frag_size,
802 asf->packet_obj_size, asf_st->pkt.size);
803 asf->packet_obj_size= asf_st->pkt.size;
804 }
805
806 if ( asf_st->pkt.size != asf->packet_obj_size
807 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
808 if(asf_st->pkt.data){
809 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
810 asf_st->frag_offset = 0;
811 av_free_packet(&asf_st->pkt);
812 }
813 /* new packet */
814 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
815 asf_st->seq = asf->packet_seq;
816 asf_st->pkt.pts = asf->packet_frag_timestamp;
817 asf_st->pkt.stream_index = asf->stream_index;
818 asf_st->pkt.pos =
819 asf_st->packet_pos= asf->packet_pos;
820 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
821 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
822 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
823 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
824 asf->packet_key_frame = 1;
825 if (asf->packet_key_frame)
826 asf_st->pkt.flags |= PKT_FLAG_KEY;
827 }
828
829 /* read data */
830 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
831 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
832 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
833 asf->packet_size_left -= asf->packet_frag_size;
834 if (asf->packet_size_left < 0)
835 continue;
836
837 if( asf->packet_frag_offset >= asf_st->pkt.size
838 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
839 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
840 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
841 continue;
842 }
843
844 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
845 asf->packet_frag_size);
846 if (s->key && s->keylen == 20)
847 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
848 asf->packet_frag_size);
849 asf_st->frag_offset += asf->packet_frag_size;
850 /* test if whole packet is read */
851 if (asf_st->frag_offset == asf_st->pkt.size) {
852 //workaround for macroshit radio DVR-MS files
853 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
854 && asf_st->pkt.size > 100){
855 int i;
856 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
857 if(i == asf_st->pkt.size){
858 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
859 asf_st->frag_offset = 0;
860 av_free_packet(&asf_st->pkt);
861 continue;
862 }
863 }
864
865 /* return packet */
866 if (asf_st->ds_span > 1) {
867 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
868 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);
869 }else{
870 /* packet descrambling */
871 uint8_t *newdata = av_malloc(asf_st->pkt.size);
872 if (newdata) {
873 int offset = 0;
874 while (offset < asf_st->pkt.size) {
875 int off = offset / asf_st->ds_chunk_size;
876 int row = off / asf_st->ds_span;
877 int col = off % asf_st->ds_span;
878 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
879 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
880
881 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
882 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
883 memcpy(newdata + offset,
884 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
885 asf_st->ds_chunk_size);
886 offset += asf_st->ds_chunk_size;
887 }
888 av_free(asf_st->pkt.data);
889 asf_st->pkt.data = newdata;
890 }
891 }
892 }
893 asf_st->frag_offset = 0;
894 *pkt= asf_st->pkt;
895 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
896 asf_st->pkt.size = 0;
897 asf_st->pkt.data = 0;
898 break; // packet completed
899 }
900 }
901 return 0;
902 }
903
904 // Added to support seeking after packets have been read
905 // If information is not reset, read_packet fails due to
906 // leftover information from previous reads
907 static void asf_reset_header(AVFormatContext *s)
908 {
909 ASFContext *asf = s->priv_data;
910 ASFStream *asf_st;
911 int i;
912
913 asf->packet_nb_frames = 0;
914 asf->packet_size_left = 0;
915 asf->packet_segments = 0;
916 asf->packet_flags = 0;
917 asf->packet_property = 0;
918 asf->packet_timestamp = 0;
919 asf->packet_segsizetype = 0;
920 asf->packet_segments = 0;
921 asf->packet_seq = 0;
922 asf->packet_replic_size = 0;
923 asf->packet_key_frame = 0;
924 asf->packet_padsize = 0;
925 asf->packet_frag_offset = 0;
926 asf->packet_frag_size = 0;
927 asf->packet_frag_timestamp = 0;
928 asf->packet_multi_size = 0;
929 asf->packet_obj_size = 0;
930 asf->packet_time_delta = 0;
931 asf->packet_time_start = 0;
932
933 for(i=0; i<s->nb_streams; i++){
934 asf_st= s->streams[i]->priv_data;
935 av_free_packet(&asf_st->pkt);
936 asf_st->frag_offset=0;
937 asf_st->seq=0;
938 }
939 asf->asf_st= NULL;
940 }
941
942 static int asf_read_close(AVFormatContext *s)
943 {
944 int i;
945
946 asf_reset_header(s);
947 for(i=0;i<s->nb_streams;i++) {
948 AVStream *st = s->streams[i];
949 av_free(st->priv_data);
950 av_free(st->codec->palctrl);
951 }
952 return 0;
953 }
954
955 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
956 {
957 ASFContext *asf = s->priv_data;
958 AVPacket pkt1, *pkt = &pkt1;
959 ASFStream *asf_st;
960 int64_t pts;
961 int64_t pos= *ppos;
962 int i;
963 int64_t start_pos[s->nb_streams];
964
965 for(i=0; i<s->nb_streams; i++){
966 start_pos[i]= pos;
967 }
968
969 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
970 *ppos= pos;
971 url_fseek(s->pb, pos, SEEK_SET);
972
973 //printf("asf_read_pts\n");
974 asf_reset_header(s);
975 for(;;){
976 if (av_read_frame(s, pkt) < 0){
977 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
978 return AV_NOPTS_VALUE;
979 }
980
981 pts= pkt->pts;
982
983 av_free_packet(pkt);
984 if(pkt->flags&PKT_FLAG_KEY){
985 i= pkt->stream_index;
986
987 asf_st= s->streams[i]->priv_data;
988
989 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
990 pos= asf_st->packet_pos;
991
992 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
993 start_pos[i]= asf_st->packet_pos + 1;
994
995 if(pkt->stream_index == stream_index)
996 break;
997 }
998 }
999
1000 *ppos= pos;
1001 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1002
1003 return pts;
1004 }
1005
1006 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1007 {
1008 GUID g;
1009 ASFContext *asf = s->priv_data;
1010 int64_t gsize, itime;
1011 int64_t pos, current_pos, index_pts;
1012 int i;
1013 int pct,ict;
1014
1015 current_pos = url_ftell(s->pb);
1016
1017 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1018 get_guid(s->pb, &g);
1019 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1020 gsize = get_le64(s->pb);
1021 get_guid(s->pb, &g);
1022 itime=get_le64(s->pb);
1023 pct=get_le32(s->pb);
1024 ict=get_le32(s->pb);
1025 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1026
1027 for (i=0;i<ict;i++){
1028 int pktnum=get_le32(s->pb);
1029 int pktct =get_le16(s->pb);
1030 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1031
1032 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1033 index_pts=av_rescale(itime, i, 10000);
1034
1035 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1036 }
1037 asf->index_read= 1;
1038 }
1039 url_fseek(s->pb, current_pos, SEEK_SET);
1040 }
1041
1042 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1043 {
1044 ASFContext *asf = s->priv_data;
1045 AVStream *st = s->streams[stream_index];
1046 int64_t pos;
1047 int index;
1048
1049 if (asf->packet_size <= 0)
1050 return -1;
1051
1052 /* Try using the protocol's read_seek if available */
1053 if(s->pb) {
1054 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1055 if(ret >= 0)
1056 asf_reset_header(s);
1057 if (ret != AVERROR(ENOSYS))
1058 return ret;
1059 }
1060
1061 if (!asf->index_read)
1062 asf_build_simple_index(s, stream_index);
1063
1064 if(!(asf->index_read && st->index_entries)){
1065 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1066 return -1;
1067 }else{
1068 index= av_index_search_timestamp(st, pts, flags);
1069 if(index<0)
1070 return -1;
1071
1072 /* find the position */
1073 pos = st->index_entries[index].pos;
1074 pts = st->index_entries[index].timestamp;
1075
1076 // various attempts to find key frame have failed so far
1077 // asf_reset_header(s);
1078 // url_fseek(s->pb, pos, SEEK_SET);
1079 // key_pos = pos;
1080 // for(i=0;i<16;i++){
1081 // pos = url_ftell(s->pb);
1082 // if (av_read_frame(s, &pkt) < 0){
1083 // av_log(s, AV_LOG_INFO, "seek failed\n");
1084 // return -1;
1085 // }
1086 // asf_st = s->streams[stream_index]->priv_data;
1087 // pos += st->parser->frame_offset;
1088 //
1089 // if (pkt.size > b) {
1090 // b = pkt.size;
1091 // key_pos = pos;
1092 // }
1093 //
1094 // av_free_packet(&pkt);
1095 // }
1096
1097 /* do the seek */
1098 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1099 url_fseek(s->pb, pos, SEEK_SET);
1100 }
1101 asf_reset_header(s);
1102 return 0;
1103 }
1104
1105 AVInputFormat asf_demuxer = {
1106 "asf",
1107 "asf format",
1108 sizeof(ASFContext),
1109 asf_probe,
1110 asf_read_header,
1111 asf_read_packet,
1112 asf_read_close,
1113 asf_read_seek,
1114 asf_read_pts,
1115 };