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Merge branch 'master' of http://repo.or.cz/r/FFMpeg-mirror
[FFMpeg-mirror/DVCPRO-HD.git] / libavformat / asf.c
blobfaa0d6916afbe4843934cf3a92b1d076cace9391
1 /*
2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/common.h"
23 #include "libavcodec/mpegaudio.h"
24 #include "avformat.h"
25 #include "riff.h"
26 #include "asf.h"
27 #include "asfcrypt.h"
28
29 extern void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
30
31 #undef NDEBUG
32 #include <assert.h>
33
34 #define FRAME_HEADER_SIZE 17
35 // Fix Me! FRAME_HEADER_SIZE may be different.
36
37 static const GUID index_guid = {
38 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
39 };
40
41 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
42 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
43 };
44 /**********************************/
45 /* decoding */
46
47 //#define DEBUG
48
49 #ifdef DEBUG
50 #define PRINT_IF_GUID(g,cmp) \
51 if (!memcmp(g, &cmp, sizeof(GUID))) \
52 printf("(GUID: %s) ", #cmp)
53
54 static void print_guid(const GUID *g)
55 {
56 int i;
57 PRINT_IF_GUID(g, asf_header);
58 else PRINT_IF_GUID(g, file_header);
59 else PRINT_IF_GUID(g, stream_header);
60 else PRINT_IF_GUID(g, audio_stream);
61 else PRINT_IF_GUID(g, audio_conceal_none);
62 else PRINT_IF_GUID(g, video_stream);
63 else PRINT_IF_GUID(g, video_conceal_none);
64 else PRINT_IF_GUID(g, command_stream);
65 else PRINT_IF_GUID(g, comment_header);
66 else PRINT_IF_GUID(g, codec_comment_header);
67 else PRINT_IF_GUID(g, codec_comment1_header);
68 else PRINT_IF_GUID(g, data_header);
69 else PRINT_IF_GUID(g, index_guid);
70 else PRINT_IF_GUID(g, head1_guid);
71 else PRINT_IF_GUID(g, head2_guid);
72 else PRINT_IF_GUID(g, my_guid);
73 else PRINT_IF_GUID(g, ext_stream_header);
74 else PRINT_IF_GUID(g, extended_content_header);
75 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
76 else PRINT_IF_GUID(g, ext_stream_audio_stream);
77 else PRINT_IF_GUID(g, metadata_header);
78 else PRINT_IF_GUID(g, stream_bitrate_guid);
79 else
80 printf("(GUID: unknown) ");
81 for(i=0;i<16;i++)
82 printf(" 0x%02x,", (*g)[i]);
83 printf("}\n");
84 }
85 #undef PRINT_IF_GUID
86 #endif
87
88 static void get_guid(ByteIOContext *s, GUID *g)
89 {
90 assert(sizeof(*g) == 16);
91 get_buffer(s, *g, sizeof(*g));
92 }
93
94 #if 0
95 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
96 {
97 int len, c;
98 char *q;
99
100 len = get_le16(pb);
101 q = buf;
102 while (len > 0) {
103 c = get_le16(pb);
104 if ((q - buf) < buf_size - 1)
105 *q++ = c;
106 len--;
107 }
108 *q = '\0';
109 }
110 #endif
111
112 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
113 {
114 char* q = buf;
115 len /= 2;
116 while (len--) {
117 uint8_t tmp;
118 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
119 }
120 *q = '\0';
121 }
122
123 static int asf_probe(AVProbeData *pd)
124 {
125 /* check file header */
126 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
127 return AVPROBE_SCORE_MAX;
128 else
129 return 0;
130 }
131
132 static int get_value(ByteIOContext *pb, int type){
133 switch(type){
134 case 2: return get_le32(pb);
135 case 3: return get_le32(pb);
136 case 4: return get_le64(pb);
137 case 5: return get_le16(pb);
138 default:return INT_MIN;
139 }
140 }
141
142 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
143 {
144 ASFContext *asf = s->priv_data;
145 GUID g;
146 ByteIOContext *pb = s->pb;
147 AVStream *st;
148 ASFStream *asf_st;
149 int size, i;
150 int64_t gsize;
151 AVRational dar[128];
152 uint32_t bitrate[128];
153
154 memset(dar, 0, sizeof(dar));
155 memset(bitrate, 0, sizeof(bitrate));
156
157 get_guid(pb, &g);
158 if (memcmp(&g, &asf_header, sizeof(GUID)))
159 return -1;
160 get_le64(pb);
161 get_le32(pb);
162 get_byte(pb);
163 get_byte(pb);
164 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
165 for(;;) {
166 get_guid(pb, &g);
167 gsize = get_le64(pb);
168 #ifdef DEBUG
169 printf("%08"PRIx64": ", url_ftell(pb) - 24);
170 print_guid(&g);
171 printf(" size=0x%"PRIx64"\n", gsize);
172 #endif
173 if (!memcmp(&g, &data_header, sizeof(GUID))) {
174 asf->data_object_offset = url_ftell(pb);
175 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
176 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
177 asf->data_object_size = gsize - 24;
178 } else {
179 asf->data_object_size = (uint64_t)-1;
180 }
181 break;
182 }
183 if (gsize < 24)
184 return -1;
185 if (!memcmp(&g, &file_header, sizeof(GUID))) {
186 get_guid(pb, &asf->hdr.guid);
187 asf->hdr.file_size = get_le64(pb);
188 asf->hdr.create_time = get_le64(pb);
189 asf->nb_packets = get_le64(pb);
190 asf->hdr.play_time = get_le64(pb);
191 asf->hdr.send_time = get_le64(pb);
192 asf->hdr.preroll = get_le32(pb);
193 asf->hdr.ignore = get_le32(pb);
194 asf->hdr.flags = get_le32(pb);
195 asf->hdr.min_pktsize = get_le32(pb);
196 asf->hdr.max_pktsize = get_le32(pb);
197 asf->hdr.max_bitrate = get_le32(pb);
198 asf->packet_size = asf->hdr.max_pktsize;
199 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
200 int type, type_specific_size, sizeX;
201 uint64_t total_size;
202 unsigned int tag1;
203 int64_t pos1, pos2, start_time;
204 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
205
206 pos1 = url_ftell(pb);
207
208 st = av_new_stream(s, 0);
209 if (!st)
210 return AVERROR(ENOMEM);
211 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
212 asf_st = av_mallocz(sizeof(ASFStream));
213 if (!asf_st)
214 return AVERROR(ENOMEM);
215 st->priv_data = asf_st;
216 start_time = asf->hdr.preroll;
217
218 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
219 st->duration = asf->hdr.send_time /
220 (10000000 / 1000) - start_time;
221 }
222 get_guid(pb, &g);
223
224 test_for_ext_stream_audio = 0;
225 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
226 type = CODEC_TYPE_AUDIO;
227 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
228 type = CODEC_TYPE_VIDEO;
229 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
230 type = CODEC_TYPE_UNKNOWN;
231 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
232 test_for_ext_stream_audio = 1;
233 type = CODEC_TYPE_UNKNOWN;
234 } else {
235 return -1;
236 }
237 get_guid(pb, &g);
238 total_size = get_le64(pb);
239 type_specific_size = get_le32(pb);
240 get_le32(pb);
241 st->id = get_le16(pb) & 0x7f; /* stream id */
242 // mapping of asf ID to AV stream ID;
243 asf->asfid2avid[st->id] = s->nb_streams - 1;
244
245 get_le32(pb);
246
247 if (test_for_ext_stream_audio) {
248 get_guid(pb, &g);
249 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
250 type = CODEC_TYPE_AUDIO;
251 is_dvr_ms_audio=1;
252 get_guid(pb, &g);
253 get_le32(pb);
254 get_le32(pb);
255 get_le32(pb);
256 get_guid(pb, &g);
257 get_le32(pb);
258 }
259 }
260
261 st->codec->codec_type = type;
262 if (type == CODEC_TYPE_AUDIO) {
263 get_wav_header(pb, st->codec, type_specific_size);
264 if (is_dvr_ms_audio) {
265 // codec_id and codec_tag are unreliable in dvr_ms
266 // files. Set them later by probing stream.
267 st->codec->codec_id = CODEC_ID_NONE;
268 st->codec->codec_tag = 0;
269 }
270 st->need_parsing = AVSTREAM_PARSE_FULL;
271 /* We have to init the frame size at some point .... */
272 pos2 = url_ftell(pb);
273 if (gsize >= (pos2 + 8 - pos1 + 24)) {
274 asf_st->ds_span = get_byte(pb);
275 asf_st->ds_packet_size = get_le16(pb);
276 asf_st->ds_chunk_size = get_le16(pb);
277 get_le16(pb); //ds_data_size
278 get_byte(pb); //ds_silence_data
279 }
280 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
281 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
282 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
283 if (asf_st->ds_span > 1) {
284 if (!asf_st->ds_chunk_size
285 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
286 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
287 asf_st->ds_span = 0; // disable descrambling
288 }
289 switch (st->codec->codec_id) {
290 case CODEC_ID_MP3:
291 st->codec->frame_size = MPA_FRAME_SIZE;
292 break;
293 case CODEC_ID_PCM_S16LE:
294 case CODEC_ID_PCM_S16BE:
295 case CODEC_ID_PCM_U16LE:
296 case CODEC_ID_PCM_U16BE:
297 case CODEC_ID_PCM_S8:
298 case CODEC_ID_PCM_U8:
299 case CODEC_ID_PCM_ALAW:
300 case CODEC_ID_PCM_MULAW:
301 st->codec->frame_size = 1;
302 break;
303 default:
304 /* This is probably wrong, but it prevents a crash later */
305 st->codec->frame_size = 1;
306 break;
307 }
308 } else if (type == CODEC_TYPE_VIDEO) {
309 get_le32(pb);
310 get_le32(pb);
311 get_byte(pb);
312 size = get_le16(pb); /* size */
313 sizeX= get_le32(pb); /* size */
314 st->codec->width = get_le32(pb);
315 st->codec->height = get_le32(pb);
316 /* not available for asf */
317 get_le16(pb); /* panes */
318 st->codec->bits_per_sample = get_le16(pb); /* depth */
319 tag1 = get_le32(pb);
320 url_fskip(pb, 20);
321 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
322 size= sizeX;
323 if (size > 40) {
324 st->codec->extradata_size = size - 40;
325 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
326 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
327 }
328
329 /* Extract palette from extradata if bpp <= 8 */
330 /* This code assumes that extradata contains only palette */
331 /* This is true for all paletted codecs implemented in ffmpeg */
332 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
333 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
334 #ifdef WORDS_BIGENDIAN
335 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
336 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
337 #else
338 memcpy(st->codec->palctrl->palette, st->codec->extradata,
339 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
340 #endif
341 st->codec->palctrl->palette_changed = 1;
342 }
343
344 st->codec->codec_tag = tag1;
345 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
346 if(tag1 == MKTAG('D', 'V', 'R', ' '))
347 st->need_parsing = AVSTREAM_PARSE_FULL;
348 }
349 pos2 = url_ftell(pb);
350 url_fskip(pb, gsize - (pos2 - pos1 + 24));
351 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
352 int len1, len2, len3, len4, len5;
353
354 len1 = get_le16(pb);
355 len2 = get_le16(pb);
356 len3 = get_le16(pb);
357 len4 = get_le16(pb);
358 len5 = get_le16(pb);
359 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
360 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
361 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
362 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
363 url_fskip(pb, len5);
364 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
365 int stream_count = get_le16(pb);
366 int j;
367
368 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
369 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
370 for(j = 0; j < stream_count; j++) {
371 int flags, bitrate, stream_id;
372
373 flags= get_le16(pb);
374 bitrate= get_le32(pb);
375 stream_id= (flags & 0x7f);
376 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
377 asf->stream_bitrates[stream_id]= bitrate;
378 }
379 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
380 int desc_count, i;
381
382 desc_count = get_le16(pb);
383 for(i=0;i<desc_count;i++)
384 {
385 int name_len,value_type,value_len;
386 uint64_t value_num = 0;
387 char name[1024];
388
389 name_len = get_le16(pb);
390 get_str16_nolen(pb, name_len, name, sizeof(name));
391 value_type = get_le16(pb);
392 value_len = get_le16(pb);
393 if (value_type <= 1) // unicode or byte
394 {
395 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
396 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
397 else if(!strcmp(name,"WM/Year" )) {
398 char year[8];
399 get_str16_nolen(pb, value_len, year, sizeof(year));
400 s->year = atoi(year);
401 }
402 else if(!strcmp(name,"WM/Track") && s->track == 0) {
403 char track[8];
404 get_str16_nolen(pb, value_len, track, sizeof(track));
405 s->track = strtol(track, NULL, 10) + 1;
406 }
407 else if(!strcmp(name,"WM/TrackNumber")) {
408 char track[8];
409 get_str16_nolen(pb, value_len, track, sizeof(track));
410 s->track = strtol(track, NULL, 10);
411 }
412 else url_fskip(pb, value_len);
413 }
414 else if (value_type <= 5) // boolean or DWORD or QWORD or WORD
415 {
416 value_num= get_value(pb, value_type);
417 if (!strcmp(name,"WM/Track" ) && s->track == 0) s->track = value_num + 1;
418 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
419 }else
420 url_fskip(pb, value_len);
421 }
422 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
423 int n, stream_num, name_len, value_len, value_type, value_num;
424 n = get_le16(pb);
425
426 for(i=0;i<n;i++) {
427 char name[1024];
428
429 get_le16(pb); //lang_list_index
430 stream_num= get_le16(pb);
431 name_len= get_le16(pb);
432 value_type= get_le16(pb);
433 value_len= get_le32(pb);
434
435 get_str16_nolen(pb, name_len, name, sizeof(name));
436 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
437 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
438 url_fskip(pb, value_len - 2);
439
440 if(stream_num<128){
441 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
442 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
443 }
444 }
445 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
446 int ext_len, payload_ext_ct, stream_ct;
447 uint32_t ext_d, leak_rate, stream_num;
448 int64_t pos_ex_st;
449 pos_ex_st = url_ftell(pb);
450
451 get_le64(pb); // starttime
452 get_le64(pb); // endtime
453 leak_rate = get_le32(pb); // leak-datarate
454 get_le32(pb); // bucket-datasize
455 get_le32(pb); // init-bucket-fullness
456 get_le32(pb); // alt-leak-datarate
457 get_le32(pb); // alt-bucket-datasize
458 get_le32(pb); // alt-init-bucket-fullness
459 get_le32(pb); // max-object-size
460 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
461 stream_num = get_le16(pb); // stream-num
462 get_le16(pb); // stream-language-id-index
463 get_le64(pb); // avg frametime in 100ns units
464 stream_ct = get_le16(pb); //stream-name-count
465 payload_ext_ct = get_le16(pb); //payload-extension-system-count
466
467 if (stream_num < 128)
468 bitrate[stream_num] = leak_rate;
469
470 for (i=0; i<stream_ct; i++){
471 get_le16(pb);
472 ext_len = get_le16(pb);
473 url_fseek(pb, ext_len, SEEK_CUR);
474 }
475
476 for (i=0; i<payload_ext_ct; i++){
477 get_guid(pb, &g);
478 ext_d=get_le16(pb);
479 ext_len=get_le32(pb);
480 url_fseek(pb, ext_len, SEEK_CUR);
481 }
482
483 // there could be a optional stream properties object to follow
484 // if so the next iteration will pick it up
485 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
486 int v1, v2;
487 get_guid(pb, &g);
488 v1 = get_le32(pb);
489 v2 = get_le16(pb);
490 #if 0
491 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
492 int len, v1, n, num;
493 char str[256], *q;
494 char tag[16];
495
496 get_guid(pb, &g);
497 print_guid(&g);
498
499 n = get_le32(pb);
500 for(i=0;i<n;i++) {
501 num = get_le16(pb); /* stream number */
502 get_str16(pb, str, sizeof(str));
503 get_str16(pb, str, sizeof(str));
504 len = get_le16(pb);
505 q = tag;
506 while (len > 0) {
507 v1 = get_byte(pb);
508 if ((q - tag) < sizeof(tag) - 1)
509 *q++ = v1;
510 len--;
511 }
512 *q = '\0';
513 }
514 #endif
515 } else if (url_feof(pb)) {
516 return -1;
517 } else {
518 url_fseek(pb, gsize - 24, SEEK_CUR);
519 }
520 }
521 get_guid(pb, &g);
522 get_le64(pb);
523 get_byte(pb);
524 get_byte(pb);
525 if (url_feof(pb))
526 return -1;
527 asf->data_offset = url_ftell(pb);
528 asf->packet_size_left = 0;
529
530
531 for(i=0; i<128; i++){
532 int stream_num= asf->asfid2avid[i];
533 if(stream_num>=0){
534 AVCodecContext *codec= s->streams[stream_num]->codec;
535 if (!codec->bit_rate)
536 codec->bit_rate = bitrate[i];
537 if (dar[i].num > 0 && dar[i].den > 0)
538 av_reduce(&codec->sample_aspect_ratio.num,
539 &codec->sample_aspect_ratio.den,
540 dar[i].num, dar[i].den, INT_MAX);
541 //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);
542 }
543 }
544
545 return 0;
546 }
547
548 #define DO_2BITS(bits, var, defval) \
549 switch (bits & 3) \
550 { \
551 case 3: var = get_le32(pb); rsize += 4; break; \
552 case 2: var = get_le16(pb); rsize += 2; break; \
553 case 1: var = get_byte(pb); rsize++; break; \
554 default: var = defval; break; \
555 }
556
557 /**
558 *
559 * @return <0 in case of an error
560 */
561 static int asf_get_packet(AVFormatContext *s)
562 {
563 ASFContext *asf = s->priv_data;
564 ByteIOContext *pb = s->pb;
565 uint32_t packet_length, padsize;
566 int rsize = 8;
567 int c, d, e, off;
568
569 off= (url_ftell(s->pb) - s->data_offset) % asf->packet_size + 3;
570
571 c=d=e=-1;
572 while(off-- > 0){
573 c=d; d=e;
574 e= get_byte(pb);
575 if(c == 0x82 && !d && !e)
576 break;
577 }
578
579 if (c != 0x82) {
580 if (!url_feof(pb))
581 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
582 }
583 if ((c & 0x8f) == 0x82) {
584 if (d || e) {
585 if (!url_feof(pb))
586 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
587 return -1;
588 }
589 c= get_byte(pb);
590 d= get_byte(pb);
591 rsize+=3;
592 }else{
593 url_fseek(pb, -1, SEEK_CUR); //FIXME
594 }
595
596 asf->packet_flags = c;
597 asf->packet_property = d;
598
599 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
600 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
601 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
602
603 //the following checks prevent overflows and infinite loops
604 if(packet_length >= (1U<<29)){
605 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
606 return -1;
607 }
608 if(padsize >= packet_length){
609 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
610 return -1;
611 }
612
613 asf->packet_timestamp = get_le32(pb);
614 get_le16(pb); /* duration */
615 // rsize has at least 11 bytes which have to be present
616
617 if (asf->packet_flags & 0x01) {
618 asf->packet_segsizetype = get_byte(pb); rsize++;
619 asf->packet_segments = asf->packet_segsizetype & 0x3f;
620 } else {
621 asf->packet_segments = 1;
622 asf->packet_segsizetype = 0x80;
623 }
624 asf->packet_size_left = packet_length - padsize - rsize;
625 if (packet_length < asf->hdr.min_pktsize)
626 padsize += asf->hdr.min_pktsize - packet_length;
627 asf->packet_padsize = padsize;
628 #ifdef DEBUG
629 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
630 #endif
631 return 0;
632 }
633
634 /**
635 *
636 * @return <0 if error
637 */
638 static int asf_read_frame_header(AVFormatContext *s){
639 ASFContext *asf = s->priv_data;
640 ByteIOContext *pb = s->pb;
641 int rsize = 1;
642 int num = get_byte(pb);
643 int64_t ts0, ts1;
644
645 asf->packet_segments--;
646 asf->packet_key_frame = num >> 7;
647 asf->stream_index = asf->asfid2avid[num & 0x7f];
648 // sequence should be ignored!
649 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
650 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
651 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
652 //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);
653 if (asf->packet_replic_size >= 8) {
654 asf->packet_obj_size = get_le32(pb);
655 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
656 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
657 return -1;
658 }
659 asf->packet_frag_timestamp = get_le32(pb); // timestamp
660 if(asf->packet_replic_size >= 8+38+4){
661 // for(i=0; i<asf->packet_replic_size-8; i++)
662 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
663 // av_log(s, AV_LOG_DEBUG, "\n");
664 url_fskip(pb, 10);
665 ts0= get_le64(pb);
666 ts1= get_le64(pb);
667 url_fskip(pb, 12);
668 get_le32(pb);
669 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
670 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
671 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
672 }else
673 url_fskip(pb, asf->packet_replic_size - 8);
674 rsize += asf->packet_replic_size; // FIXME - check validity
675 } else if (asf->packet_replic_size==1){
676 // multipacket - frag_offset is beginning timestamp
677 asf->packet_time_start = asf->packet_frag_offset;
678 asf->packet_frag_offset = 0;
679 asf->packet_frag_timestamp = asf->packet_timestamp;
680
681 asf->packet_time_delta = get_byte(pb);
682 rsize++;
683 }else if(asf->packet_replic_size!=0){
684 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
685 return -1;
686 }
687 if (asf->packet_flags & 0x01) {
688 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
689 if(asf->packet_frag_size > asf->packet_size_left - rsize){
690 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
691 return -1;
692 }
693 //printf("Fragsize %d\n", asf->packet_frag_size);
694 } else {
695 asf->packet_frag_size = asf->packet_size_left - rsize;
696 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
697 }
698 if (asf->packet_replic_size == 1) {
699 asf->packet_multi_size = asf->packet_frag_size;
700 if (asf->packet_multi_size > asf->packet_size_left)
701 return -1;
702 }
703 asf->packet_size_left -= rsize;
704 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
705
706 return 0;
707 }
708
709 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
710 {
711 ASFContext *asf = s->priv_data;
712 ASFStream *asf_st = 0;
713 ByteIOContext *pb = s->pb;
714 //static int pc = 0;
715 for (;;) {
716 if(url_feof(pb))
717 return AVERROR(EIO);
718 if (asf->packet_size_left < FRAME_HEADER_SIZE
719 || asf->packet_segments < 1) {
720 //asf->packet_size_left <= asf->packet_padsize) {
721 int ret = asf->packet_size_left + asf->packet_padsize;
722 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
723 assert(ret>=0);
724 /* fail safe */
725 url_fskip(pb, ret);
726
727 asf->packet_pos= url_ftell(s->pb);
728 if (asf->data_object_size != (uint64_t)-1 &&
729 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
730 return AVERROR(EIO); /* Do not exceed the size of the data object */
731 ret = asf_get_packet(s);
732 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
733 if (ret < 0)
734 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
735 asf->packet_time_start = 0;
736 continue;
737 }
738 if (asf->packet_time_start == 0) {
739 if(asf_read_frame_header(s) < 0){
740 asf->packet_segments= 0;
741 continue;
742 }
743 if (asf->stream_index < 0
744 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
745 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
746 ) {
747 asf->packet_time_start = 0;
748 /* unhandled packet (should not happen) */
749 url_fskip(pb, asf->packet_frag_size);
750 asf->packet_size_left -= asf->packet_frag_size;
751 if(asf->stream_index < 0)
752 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
753 continue;
754 }
755 asf->asf_st = s->streams[asf->stream_index]->priv_data;
756 }
757 asf_st = asf->asf_st;
758
759 if (asf->packet_replic_size == 1) {
760 // frag_offset is here used as the beginning timestamp
761 asf->packet_frag_timestamp = asf->packet_time_start;
762 asf->packet_time_start += asf->packet_time_delta;
763 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
764 asf->packet_size_left--;
765 asf->packet_multi_size--;
766 if (asf->packet_multi_size < asf->packet_obj_size)
767 {
768 asf->packet_time_start = 0;
769 url_fskip(pb, asf->packet_multi_size);
770 asf->packet_size_left -= asf->packet_multi_size;
771 continue;
772 }
773 asf->packet_multi_size -= asf->packet_obj_size;
774 //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);
775 }
776 if( /*asf->packet_frag_size == asf->packet_obj_size*/
777 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
778 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
779 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
780 asf_st->frag_offset, asf->packet_frag_size,
781 asf->packet_obj_size, asf_st->pkt.size);
782 asf->packet_obj_size= asf_st->pkt.size;
783 }
784
785 if ( asf_st->pkt.size != asf->packet_obj_size
786 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
787 if(asf_st->pkt.data){
788 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
789 asf_st->frag_offset = 0;
790 av_free_packet(&asf_st->pkt);
791 }
792 /* new packet */
793 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
794 asf_st->seq = asf->packet_seq;
795 asf_st->pkt.pts = asf->packet_frag_timestamp;
796 asf_st->pkt.stream_index = asf->stream_index;
797 asf_st->pkt.pos =
798 asf_st->packet_pos= asf->packet_pos;
799 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
800 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
801 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
802 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
803 asf->packet_key_frame = 1;
804 if (asf->packet_key_frame)
805 asf_st->pkt.flags |= PKT_FLAG_KEY;
806 }
807
808 /* read data */
809 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
810 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
811 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
812 asf->packet_size_left -= asf->packet_frag_size;
813 if (asf->packet_size_left < 0)
814 continue;
815
816 if( asf->packet_frag_offset >= asf_st->pkt.size
817 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
818 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
819 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
820 continue;
821 }
822
823 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
824 asf->packet_frag_size);
825 if (s->key && s->keylen == 20)
826 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
827 asf->packet_frag_size);
828 asf_st->frag_offset += asf->packet_frag_size;
829 /* test if whole packet is read */
830 if (asf_st->frag_offset == asf_st->pkt.size) {
831 //workaround for macroshit radio DVR-MS files
832 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
833 && asf_st->pkt.size > 100){
834 int i;
835 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
836 if(i == asf_st->pkt.size){
837 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
838 asf_st->frag_offset = 0;
839 av_free_packet(&asf_st->pkt);
840 continue;
841 }
842 }
843
844 /* return packet */
845 if (asf_st->ds_span > 1) {
846 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
847 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);
848 }else{
849 /* packet descrambling */
850 uint8_t *newdata = av_malloc(asf_st->pkt.size);
851 if (newdata) {
852 int offset = 0;
853 while (offset < asf_st->pkt.size) {
854 int off = offset / asf_st->ds_chunk_size;
855 int row = off / asf_st->ds_span;
856 int col = off % asf_st->ds_span;
857 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
858 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
859
860 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
861 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
862 memcpy(newdata + offset,
863 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
864 asf_st->ds_chunk_size);
865 offset += asf_st->ds_chunk_size;
866 }
867 av_free(asf_st->pkt.data);
868 asf_st->pkt.data = newdata;
869 }
870 }
871 }
872 asf_st->frag_offset = 0;
873 *pkt= asf_st->pkt;
874 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
875 asf_st->pkt.size = 0;
876 asf_st->pkt.data = 0;
877 break; // packet completed
878 }
879 }
880 return 0;
881 }
882
883 // Added to support seeking after packets have been read
884 // If information is not reset, read_packet fails due to
885 // leftover information from previous reads
886 static void asf_reset_header(AVFormatContext *s)
887 {
888 ASFContext *asf = s->priv_data;
889 ASFStream *asf_st;
890 int i;
891
892 asf->packet_nb_frames = 0;
893 asf->packet_size_left = 0;
894 asf->packet_segments = 0;
895 asf->packet_flags = 0;
896 asf->packet_property = 0;
897 asf->packet_timestamp = 0;
898 asf->packet_segsizetype = 0;
899 asf->packet_segments = 0;
900 asf->packet_seq = 0;
901 asf->packet_replic_size = 0;
902 asf->packet_key_frame = 0;
903 asf->packet_padsize = 0;
904 asf->packet_frag_offset = 0;
905 asf->packet_frag_size = 0;
906 asf->packet_frag_timestamp = 0;
907 asf->packet_multi_size = 0;
908 asf->packet_obj_size = 0;
909 asf->packet_time_delta = 0;
910 asf->packet_time_start = 0;
911
912 for(i=0; i<s->nb_streams; i++){
913 asf_st= s->streams[i]->priv_data;
914 av_free_packet(&asf_st->pkt);
915 asf_st->frag_offset=0;
916 asf_st->seq=0;
917 }
918 asf->asf_st= NULL;
919 }
920
921 static int asf_read_close(AVFormatContext *s)
922 {
923 int i;
924
925 asf_reset_header(s);
926 for(i=0;i<s->nb_streams;i++) {
927 AVStream *st = s->streams[i];
928 av_free(st->codec->palctrl);
929 }
930 return 0;
931 }
932
933 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
934 {
935 ASFContext *asf = s->priv_data;
936 AVPacket pkt1, *pkt = &pkt1;
937 ASFStream *asf_st;
938 int64_t pts;
939 int64_t pos= *ppos;
940 int i;
941 int64_t start_pos[s->nb_streams];
942
943 for(i=0; i<s->nb_streams; i++){
944 start_pos[i]= pos;
945 }
946
947 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
948 *ppos= pos;
949 url_fseek(s->pb, pos, SEEK_SET);
950
951 //printf("asf_read_pts\n");
952 asf_reset_header(s);
953 for(;;){
954 if (av_read_frame(s, pkt) < 0){
955 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
956 return AV_NOPTS_VALUE;
957 }
958
959 pts= pkt->pts;
960
961 av_free_packet(pkt);
962 if(pkt->flags&PKT_FLAG_KEY){
963 i= pkt->stream_index;
964
965 asf_st= s->streams[i]->priv_data;
966
967 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
968 pos= asf_st->packet_pos;
969
970 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
971 start_pos[i]= asf_st->packet_pos + 1;
972
973 if(pkt->stream_index == stream_index)
974 break;
975 }
976 }
977
978 *ppos= pos;
979 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
980
981 return pts;
982 }
983
984 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
985 {
986 GUID g;
987 ASFContext *asf = s->priv_data;
988 int64_t gsize, itime;
989 int64_t pos, current_pos, index_pts;
990 int i;
991 int pct,ict;
992
993 current_pos = url_ftell(s->pb);
994
995 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
996 get_guid(s->pb, &g);
997 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
998 gsize = get_le64(s->pb);
999 get_guid(s->pb, &g);
1000 itime=get_le64(s->pb);
1001 pct=get_le32(s->pb);
1002 ict=get_le32(s->pb);
1003 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1004
1005 for (i=0;i<ict;i++){
1006 int pktnum=get_le32(s->pb);
1007 int pktct =get_le16(s->pb);
1008 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1009
1010 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1011 index_pts=av_rescale(itime, i, 10000);
1012
1013 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1014 }
1015 asf->index_read= 1;
1016 }
1017 url_fseek(s->pb, current_pos, SEEK_SET);
1018 }
1019
1020 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1021 {
1022 ASFContext *asf = s->priv_data;
1023 AVStream *st = s->streams[stream_index];
1024 int64_t pos;
1025 int index;
1026
1027 if (asf->packet_size <= 0)
1028 return -1;
1029
1030 /* Try using the protocol's read_seek if available */
1031 if(s->pb) {
1032 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1033 if(ret >= 0)
1034 asf_reset_header(s);
1035 if (ret != AVERROR(ENOSYS))
1036 return ret;
1037 }
1038
1039 if (!asf->index_read)
1040 asf_build_simple_index(s, stream_index);
1041
1042 if(!(asf->index_read && st->index_entries)){
1043 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1044 return -1;
1045 }else{
1046 index= av_index_search_timestamp(st, pts, flags);
1047 if(index<0)
1048 return -1;
1049
1050 /* find the position */
1051 pos = st->index_entries[index].pos;
1052 pts = st->index_entries[index].timestamp;
1053
1054 // various attempts to find key frame have failed so far
1055 // asf_reset_header(s);
1056 // url_fseek(s->pb, pos, SEEK_SET);
1057 // key_pos = pos;
1058 // for(i=0;i<16;i++){
1059 // pos = url_ftell(s->pb);
1060 // if (av_read_frame(s, &pkt) < 0){
1061 // av_log(s, AV_LOG_INFO, "seek failed\n");
1062 // return -1;
1063 // }
1064 // asf_st = s->streams[stream_index]->priv_data;
1065 // pos += st->parser->frame_offset;
1066 //
1067 // if (pkt.size > b) {
1068 // b = pkt.size;
1069 // key_pos = pos;
1070 // }
1071 //
1072 // av_free_packet(&pkt);
1073 // }
1074
1075 /* do the seek */
1076 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1077 url_fseek(s->pb, pos, SEEK_SET);
1078 }
1079 asf_reset_header(s);
1080 return 0;
1081 }
1082
1083 AVInputFormat asf_demuxer = {
1084 "asf",
1085 NULL_IF_CONFIG_SMALL("ASF format"),
1086 sizeof(ASFContext),
1087 asf_probe,
1088 asf_read_header,
1089 asf_read_packet,
1090 asf_read_close,
1091 asf_read_seek,
1092 asf_read_pts,
1093 };
An experimental fork of FFmpeg project for DVCPRO-HD developers