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