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Reindent after r17764.
[ffmpeg-lucabe.git] / libavformat / asfdec.c
blob4d61739719e51ed5723d7264b72ad352664e7634
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 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 dprintf(NULL, "(GUID: %s) ", #cmp)
53
54 static void print_guid(const GUID *g)
55 {
56 int i;
57 PRINT_IF_GUID(g, ff_asf_header);
58 else PRINT_IF_GUID(g, ff_asf_file_header);
59 else PRINT_IF_GUID(g, ff_asf_stream_header);
60 else PRINT_IF_GUID(g, ff_asf_audio_stream);
61 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
62 else PRINT_IF_GUID(g, ff_asf_video_stream);
63 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
64 else PRINT_IF_GUID(g, ff_asf_command_stream);
65 else PRINT_IF_GUID(g, ff_asf_comment_header);
66 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
67 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
68 else PRINT_IF_GUID(g, ff_asf_data_header);
69 else PRINT_IF_GUID(g, index_guid);
70 else PRINT_IF_GUID(g, ff_asf_head1_guid);
71 else PRINT_IF_GUID(g, ff_asf_head2_guid);
72 else PRINT_IF_GUID(g, ff_asf_my_guid);
73 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
74 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
75 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
76 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
77 else PRINT_IF_GUID(g, ff_asf_metadata_header);
78 else PRINT_IF_GUID(g, stream_bitrate_guid);
79 else
80 dprintf(NULL, "(GUID: unknown) ");
81 for(i=0;i<16;i++)
82 dprintf(NULL, " 0x%02x,", (*g)[i]);
83 dprintf(NULL, "}\n");
84 }
85 #undef PRINT_IF_GUID
86 #else
87 #define print_guid(g)
88 #endif
89
90 static void get_guid(ByteIOContext *s, GUID *g)
91 {
92 assert(sizeof(*g) == 16);
93 get_buffer(s, *g, sizeof(*g));
94 }
95
96 #if 0
97 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
98 {
99 int len, c;
100 char *q;
101
102 len = get_le16(pb);
103 q = buf;
104 while (len > 0) {
105 c = get_le16(pb);
106 if ((q - buf) < buf_size - 1)
107 *q++ = c;
108 len--;
109 }
110 *q = '\0';
111 }
112 #endif
113
114 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
115 {
116 char* q = buf;
117 len /= 2;
118 while (len--) {
119 uint8_t tmp;
120 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
121 }
122 *q = '\0';
123 }
124
125 static int asf_probe(AVProbeData *pd)
126 {
127 /* check file header */
128 if (!memcmp(pd->buf, &ff_asf_header, sizeof(GUID)))
129 return AVPROBE_SCORE_MAX;
130 else
131 return 0;
132 }
133
134 static int get_value(ByteIOContext *pb, int type){
135 switch(type){
136 case 2: return get_le32(pb);
137 case 3: return get_le32(pb);
138 case 4: return get_le64(pb);
139 case 5: return get_le16(pb);
140 default:return INT_MIN;
141 }
142 }
143
144 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
145 {
146 char value[1024];
147 if (type <= 1) { // unicode or byte
148 get_str16_nolen(s->pb, len, value, sizeof(value));
149 } else if (type <= 5) { // boolean or DWORD or QWORD or WORD
150 uint64_t num = get_value(s->pb, type);
151 snprintf(value, sizeof(value), "%"PRIu64, num);
152 } else {
153 url_fskip(s->pb, len);
154 return;
155 }
156 if (strncmp(key, "WM/", 3))
157 key += 3;
158 av_metadata_set(&s->metadata, key, value);
159 }
160
161 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
162 {
163 ASFContext *asf = s->priv_data;
164 GUID g;
165 ByteIOContext *pb = s->pb;
166 AVStream *st;
167 ASFStream *asf_st;
168 int size, i;
169 int64_t gsize;
170 AVRational dar[128];
171 uint32_t bitrate[128];
172
173 memset(dar, 0, sizeof(dar));
174 memset(bitrate, 0, sizeof(bitrate));
175
176 get_guid(pb, &g);
177 if (memcmp(&g, &ff_asf_header, sizeof(GUID)))
178 return -1;
179 get_le64(pb);
180 get_le32(pb);
181 get_byte(pb);
182 get_byte(pb);
183 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
184 for(;;) {
185 get_guid(pb, &g);
186 gsize = get_le64(pb);
187 dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
188 print_guid(&g);
189 dprintf(s, " size=0x%"PRIx64"\n", gsize);
190 if (!memcmp(&g, &ff_asf_data_header, sizeof(GUID))) {
191 asf->data_object_offset = url_ftell(pb);
192 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
193 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
194 asf->data_object_size = gsize - 24;
195 } else {
196 asf->data_object_size = (uint64_t)-1;
197 }
198 break;
199 }
200 if (gsize < 24)
201 return -1;
202 if (!memcmp(&g, &ff_asf_file_header, sizeof(GUID))) {
203 get_guid(pb, &asf->hdr.guid);
204 asf->hdr.file_size = get_le64(pb);
205 asf->hdr.create_time = get_le64(pb);
206 asf->nb_packets = get_le64(pb);
207 asf->hdr.play_time = get_le64(pb);
208 asf->hdr.send_time = get_le64(pb);
209 asf->hdr.preroll = get_le32(pb);
210 asf->hdr.ignore = get_le32(pb);
211 asf->hdr.flags = get_le32(pb);
212 asf->hdr.min_pktsize = get_le32(pb);
213 asf->hdr.max_pktsize = get_le32(pb);
214 asf->hdr.max_bitrate = get_le32(pb);
215 asf->packet_size = asf->hdr.max_pktsize;
216 } else if (!memcmp(&g, &ff_asf_stream_header, sizeof(GUID))) {
217 enum CodecType type;
218 int type_specific_size, sizeX;
219 uint64_t total_size;
220 unsigned int tag1;
221 int64_t pos1, pos2, start_time;
222 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
223
224 pos1 = url_ftell(pb);
225
226 st = av_new_stream(s, 0);
227 if (!st)
228 return AVERROR(ENOMEM);
229 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
230 asf_st = av_mallocz(sizeof(ASFStream));
231 if (!asf_st)
232 return AVERROR(ENOMEM);
233 st->priv_data = asf_st;
234 start_time = asf->hdr.preroll;
235
236 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
237 st->duration = asf->hdr.send_time /
238 (10000000 / 1000) - start_time;
239 }
240 get_guid(pb, &g);
241
242 test_for_ext_stream_audio = 0;
243 if (!memcmp(&g, &ff_asf_audio_stream, sizeof(GUID))) {
244 type = CODEC_TYPE_AUDIO;
245 } else if (!memcmp(&g, &ff_asf_video_stream, sizeof(GUID))) {
246 type = CODEC_TYPE_VIDEO;
247 } else if (!memcmp(&g, &ff_asf_command_stream, sizeof(GUID))) {
248 type = CODEC_TYPE_DATA;
249 } else if (!memcmp(&g, &ff_asf_ext_stream_embed_stream_header, sizeof(GUID))) {
250 test_for_ext_stream_audio = 1;
251 type = CODEC_TYPE_UNKNOWN;
252 } else {
253 return -1;
254 }
255 get_guid(pb, &g);
256 total_size = get_le64(pb);
257 type_specific_size = get_le32(pb);
258 get_le32(pb);
259 st->id = get_le16(pb) & 0x7f; /* stream id */
260 // mapping of asf ID to AV stream ID;
261 asf->asfid2avid[st->id] = s->nb_streams - 1;
262
263 get_le32(pb);
264
265 if (test_for_ext_stream_audio) {
266 get_guid(pb, &g);
267 if (!memcmp(&g, &ff_asf_ext_stream_audio_stream, sizeof(GUID))) {
268 type = CODEC_TYPE_AUDIO;
269 is_dvr_ms_audio=1;
270 get_guid(pb, &g);
271 get_le32(pb);
272 get_le32(pb);
273 get_le32(pb);
274 get_guid(pb, &g);
275 get_le32(pb);
276 }
277 }
278
279 st->codec->codec_type = type;
280 if (type == CODEC_TYPE_AUDIO) {
281 get_wav_header(pb, st->codec, type_specific_size);
282 if (is_dvr_ms_audio) {
283 // codec_id and codec_tag are unreliable in dvr_ms
284 // files. Set them later by probing stream.
285 st->codec->codec_id = CODEC_ID_PROBE;
286 st->codec->codec_tag = 0;
287 }
288 if (st->codec->codec_id == CODEC_ID_AAC) {
289 st->need_parsing = AVSTREAM_PARSE_NONE;
290 } else {
291 st->need_parsing = AVSTREAM_PARSE_FULL;
292 }
293 /* We have to init the frame size at some point .... */
294 pos2 = url_ftell(pb);
295 if (gsize >= (pos2 + 8 - pos1 + 24)) {
296 asf_st->ds_span = get_byte(pb);
297 asf_st->ds_packet_size = get_le16(pb);
298 asf_st->ds_chunk_size = get_le16(pb);
299 get_le16(pb); //ds_data_size
300 get_byte(pb); //ds_silence_data
301 }
302 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
303 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
304 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
305 if (asf_st->ds_span > 1) {
306 if (!asf_st->ds_chunk_size
307 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
308 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
309 asf_st->ds_span = 0; // disable descrambling
310 }
311 switch (st->codec->codec_id) {
312 case CODEC_ID_MP3:
313 st->codec->frame_size = MPA_FRAME_SIZE;
314 break;
315 case CODEC_ID_PCM_S16LE:
316 case CODEC_ID_PCM_S16BE:
317 case CODEC_ID_PCM_U16LE:
318 case CODEC_ID_PCM_U16BE:
319 case CODEC_ID_PCM_S8:
320 case CODEC_ID_PCM_U8:
321 case CODEC_ID_PCM_ALAW:
322 case CODEC_ID_PCM_MULAW:
323 st->codec->frame_size = 1;
324 break;
325 default:
326 /* This is probably wrong, but it prevents a crash later */
327 st->codec->frame_size = 1;
328 break;
329 }
330 } else if (type == CODEC_TYPE_VIDEO) {
331 get_le32(pb);
332 get_le32(pb);
333 get_byte(pb);
334 size = get_le16(pb); /* size */
335 sizeX= get_le32(pb); /* size */
336 st->codec->width = get_le32(pb);
337 st->codec->height = get_le32(pb);
338 /* not available for asf */
339 get_le16(pb); /* panes */
340 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
341 tag1 = get_le32(pb);
342 url_fskip(pb, 20);
343 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
344 size= sizeX;
345 if (size > 40) {
346 st->codec->extradata_size = size - 40;
347 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
348 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
349 }
350
351 /* Extract palette from extradata if bpp <= 8 */
352 /* This code assumes that extradata contains only palette */
353 /* This is true for all paletted codecs implemented in ffmpeg */
354 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
355 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
356 #ifdef WORDS_BIGENDIAN
357 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
358 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
359 #else
360 memcpy(st->codec->palctrl->palette, st->codec->extradata,
361 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
362 #endif
363 st->codec->palctrl->palette_changed = 1;
364 }
365
366 st->codec->codec_tag = tag1;
367 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
368 if(tag1 == MKTAG('D', 'V', 'R', ' '))
369 st->need_parsing = AVSTREAM_PARSE_FULL;
370 }
371 pos2 = url_ftell(pb);
372 url_fskip(pb, gsize - (pos2 - pos1 + 24));
373 } else if (!memcmp(&g, &ff_asf_comment_header, sizeof(GUID))) {
374 int len1, len2, len3, len4, len5;
375
376 len1 = get_le16(pb);
377 len2 = get_le16(pb);
378 len3 = get_le16(pb);
379 len4 = get_le16(pb);
380 len5 = get_le16(pb);
381 get_tag(s, "title" , 0, len1);
382 get_tag(s, "author" , 0, len2);
383 get_tag(s, "copyright", 0, len3);
384 get_tag(s, "comment" , 0, len4);
385 url_fskip(pb, len5);
386 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
387 int stream_count = get_le16(pb);
388 int j;
389
390 // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
391 // av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
392 for(j = 0; j < stream_count; j++) {
393 int flags, bitrate, stream_id;
394
395 flags= get_le16(pb);
396 bitrate= get_le32(pb);
397 stream_id= (flags & 0x7f);
398 // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
399 asf->stream_bitrates[stream_id]= bitrate;
400 }
401 } else if (!memcmp(&g, &ff_asf_extended_content_header, sizeof(GUID))) {
402 int desc_count, i;
403
404 desc_count = get_le16(pb);
405 for(i=0;i<desc_count;i++)
406 {
407 int name_len,value_type,value_len;
408 char name[1024];
409
410 name_len = get_le16(pb);
411 get_str16_nolen(pb, name_len, name, sizeof(name));
412 value_type = get_le16(pb);
413 value_len = get_le16(pb);
414 get_tag(s, name, value_type, value_len);
415 }
416 } else if (!memcmp(&g, &ff_asf_metadata_header, sizeof(GUID))) {
417 int n, stream_num, name_len, value_len, value_type, value_num;
418 n = get_le16(pb);
419
420 for(i=0;i<n;i++) {
421 char name[1024];
422
423 get_le16(pb); //lang_list_index
424 stream_num= get_le16(pb);
425 name_len= get_le16(pb);
426 value_type= get_le16(pb);
427 value_len= get_le32(pb);
428
429 get_str16_nolen(pb, name_len, name, sizeof(name));
430 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
431 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
432 url_fskip(pb, value_len - 2);
433
434 if(stream_num<128){
435 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
436 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
437 }
438 }
439 } else if (!memcmp(&g, &ff_asf_ext_stream_header, sizeof(GUID))) {
440 int ext_len, payload_ext_ct, stream_ct;
441 uint32_t ext_d, leak_rate, stream_num;
442 int64_t pos_ex_st;
443 pos_ex_st = url_ftell(pb);
444
445 get_le64(pb); // starttime
446 get_le64(pb); // endtime
447 leak_rate = get_le32(pb); // leak-datarate
448 get_le32(pb); // bucket-datasize
449 get_le32(pb); // init-bucket-fullness
450 get_le32(pb); // alt-leak-datarate
451 get_le32(pb); // alt-bucket-datasize
452 get_le32(pb); // alt-init-bucket-fullness
453 get_le32(pb); // max-object-size
454 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
455 stream_num = get_le16(pb); // stream-num
456 get_le16(pb); // stream-language-id-index
457 get_le64(pb); // avg frametime in 100ns units
458 stream_ct = get_le16(pb); //stream-name-count
459 payload_ext_ct = get_le16(pb); //payload-extension-system-count
460
461 if (stream_num < 128)
462 bitrate[stream_num] = leak_rate;
463
464 for (i=0; i<stream_ct; i++){
465 get_le16(pb);
466 ext_len = get_le16(pb);
467 url_fseek(pb, ext_len, SEEK_CUR);
468 }
469
470 for (i=0; i<payload_ext_ct; i++){
471 get_guid(pb, &g);
472 ext_d=get_le16(pb);
473 ext_len=get_le32(pb);
474 url_fseek(pb, ext_len, SEEK_CUR);
475 }
476
477 // there could be a optional stream properties object to follow
478 // if so the next iteration will pick it up
479 } else if (!memcmp(&g, &ff_asf_head1_guid, sizeof(GUID))) {
480 int v1, v2;
481 get_guid(pb, &g);
482 v1 = get_le32(pb);
483 v2 = get_le16(pb);
484 #if 0
485 } else if (!memcmp(&g, &ff_asf_codec_comment_header, sizeof(GUID))) {
486 int len, v1, n, num;
487 char str[256], *q;
488 char tag[16];
489
490 get_guid(pb, &g);
491 print_guid(&g);
492
493 n = get_le32(pb);
494 for(i=0;i<n;i++) {
495 num = get_le16(pb); /* stream number */
496 get_str16(pb, str, sizeof(str));
497 get_str16(pb, str, sizeof(str));
498 len = get_le16(pb);
499 q = tag;
500 while (len > 0) {
501 v1 = get_byte(pb);
502 if ((q - tag) < sizeof(tag) - 1)
503 *q++ = v1;
504 len--;
505 }
506 *q = '\0';
507 }
508 #endif
509 } else if (url_feof(pb)) {
510 return -1;
511 } else {
512 url_fseek(pb, gsize - 24, SEEK_CUR);
513 }
514 }
515 get_guid(pb, &g);
516 get_le64(pb);
517 get_byte(pb);
518 get_byte(pb);
519 if (url_feof(pb))
520 return -1;
521 asf->data_offset = url_ftell(pb);
522 asf->packet_size_left = 0;
523
524
525 for(i=0; i<128; i++){
526 int stream_num= asf->asfid2avid[i];
527 if(stream_num>=0){
528 AVStream *st = s->streams[stream_num];
529 if (!st->codec->bit_rate)
530 st->codec->bit_rate = bitrate[i];
531 if (dar[i].num > 0 && dar[i].den > 0)
532 av_reduce(&st->sample_aspect_ratio.num,
533 &st->sample_aspect_ratio.den,
534 dar[i].num, dar[i].den, INT_MAX);
535 //av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
536 }
537 }
538
539 return 0;
540 }
541
542 #define DO_2BITS(bits, var, defval) \
543 switch (bits & 3) \
544 { \
545 case 3: var = get_le32(pb); rsize += 4; break; \
546 case 2: var = get_le16(pb); rsize += 2; break; \
547 case 1: var = get_byte(pb); rsize++; break; \
548 default: var = defval; break; \
549 }
550
551 int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
552 {
553 ASFContext *asf = s->priv_data;
554 uint32_t packet_length, padsize;
555 int rsize = 8;
556 int c, d, e, off;
557
558 off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
559
560 c=d=e=-1;
561 while(off-- > 0){
562 c=d; d=e;
563 e= get_byte(pb);
564 if(c == 0x82 && !d && !e)
565 break;
566 }
567
568 if (c != 0x82) {
569 if (!url_feof(pb))
570 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
571 }
572 if ((c & 0x8f) == 0x82) {
573 if (d || e) {
574 if (!url_feof(pb))
575 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
576 return -1;
577 }
578 c= get_byte(pb);
579 d= get_byte(pb);
580 rsize+=3;
581 }else{
582 url_fseek(pb, -1, SEEK_CUR); //FIXME
583 }
584
585 asf->packet_flags = c;
586 asf->packet_property = d;
587
588 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
589 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
590 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
591
592 //the following checks prevent overflows and infinite loops
593 if(packet_length >= (1U<<29)){
594 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
595 return -1;
596 }
597 if(padsize >= packet_length){
598 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
599 return -1;
600 }
601
602 asf->packet_timestamp = get_le32(pb);
603 get_le16(pb); /* duration */
604 // rsize has at least 11 bytes which have to be present
605
606 if (asf->packet_flags & 0x01) {
607 asf->packet_segsizetype = get_byte(pb); rsize++;
608 asf->packet_segments = asf->packet_segsizetype & 0x3f;
609 } else {
610 asf->packet_segments = 1;
611 asf->packet_segsizetype = 0x80;
612 }
613 asf->packet_size_left = packet_length - padsize - rsize;
614 if (packet_length < asf->hdr.min_pktsize)
615 padsize += asf->hdr.min_pktsize - packet_length;
616 asf->packet_padsize = padsize;
617 dprintf(s, "packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
618 return 0;
619 }
620
621 /**
622 *
623 * @return <0 if error
624 */
625 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
626 ASFContext *asf = s->priv_data;
627 int rsize = 1;
628 int num = get_byte(pb);
629 int64_t ts0, ts1;
630
631 asf->packet_segments--;
632 asf->packet_key_frame = num >> 7;
633 asf->stream_index = asf->asfid2avid[num & 0x7f];
634 // sequence should be ignored!
635 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
636 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
637 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
638 //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);
639 if (asf->packet_replic_size >= 8) {
640 asf->packet_obj_size = get_le32(pb);
641 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
642 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
643 return -1;
644 }
645 asf->packet_frag_timestamp = get_le32(pb); // timestamp
646 if(asf->packet_replic_size >= 8+38+4){
647 // for(i=0; i<asf->packet_replic_size-8; i++)
648 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
649 // av_log(s, AV_LOG_DEBUG, "\n");
650 url_fskip(pb, 10);
651 ts0= get_le64(pb);
652 ts1= get_le64(pb);
653 url_fskip(pb, 12);
654 get_le32(pb);
655 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
656 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
657 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
658 }else
659 url_fskip(pb, asf->packet_replic_size - 8);
660 rsize += asf->packet_replic_size; // FIXME - check validity
661 } else if (asf->packet_replic_size==1){
662 // multipacket - frag_offset is beginning timestamp
663 asf->packet_time_start = asf->packet_frag_offset;
664 asf->packet_frag_offset = 0;
665 asf->packet_frag_timestamp = asf->packet_timestamp;
666
667 asf->packet_time_delta = get_byte(pb);
668 rsize++;
669 }else if(asf->packet_replic_size!=0){
670 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
671 return -1;
672 }
673 if (asf->packet_flags & 0x01) {
674 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
675 if(asf->packet_frag_size > asf->packet_size_left - rsize){
676 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
677 return -1;
678 }
679 //printf("Fragsize %d\n", asf->packet_frag_size);
680 } else {
681 asf->packet_frag_size = asf->packet_size_left - rsize;
682 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
683 }
684 if (asf->packet_replic_size == 1) {
685 asf->packet_multi_size = asf->packet_frag_size;
686 if (asf->packet_multi_size > asf->packet_size_left)
687 return -1;
688 }
689 asf->packet_size_left -= rsize;
690 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
691
692 return 0;
693 }
694
695 int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
696 {
697 ASFContext *asf = s->priv_data;
698 ASFStream *asf_st = 0;
699 for (;;) {
700 if(url_feof(pb))
701 return AVERROR(EIO);
702 if (asf->packet_size_left < FRAME_HEADER_SIZE
703 || asf->packet_segments < 1) {
704 //asf->packet_size_left <= asf->packet_padsize) {
705 int ret = asf->packet_size_left + asf->packet_padsize;
706 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
707 assert(ret>=0);
708 /* fail safe */
709 url_fskip(pb, ret);
710
711 asf->packet_pos= url_ftell(pb);
712 if (asf->data_object_size != (uint64_t)-1 &&
713 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
714 return AVERROR(EIO); /* Do not exceed the size of the data object */
715 return 1;
716 }
717 if (asf->packet_time_start == 0) {
718 if(asf_read_frame_header(s, pb) < 0){
719 asf->packet_segments= 0;
720 continue;
721 }
722 if (asf->stream_index < 0
723 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
724 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
725 ) {
726 asf->packet_time_start = 0;
727 /* unhandled packet (should not happen) */
728 url_fskip(pb, asf->packet_frag_size);
729 asf->packet_size_left -= asf->packet_frag_size;
730 if(asf->stream_index < 0)
731 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
732 continue;
733 }
734 asf->asf_st = s->streams[asf->stream_index]->priv_data;
735 }
736 asf_st = asf->asf_st;
737
738 if (asf->packet_replic_size == 1) {
739 // frag_offset is here used as the beginning timestamp
740 asf->packet_frag_timestamp = asf->packet_time_start;
741 asf->packet_time_start += asf->packet_time_delta;
742 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
743 asf->packet_size_left--;
744 asf->packet_multi_size--;
745 if (asf->packet_multi_size < asf->packet_obj_size)
746 {
747 asf->packet_time_start = 0;
748 url_fskip(pb, asf->packet_multi_size);
749 asf->packet_size_left -= asf->packet_multi_size;
750 continue;
751 }
752 asf->packet_multi_size -= asf->packet_obj_size;
753 //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);
754 }
755 if( /*asf->packet_frag_size == asf->packet_obj_size*/
756 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
757 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
758 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
759 asf_st->frag_offset, asf->packet_frag_size,
760 asf->packet_obj_size, asf_st->pkt.size);
761 asf->packet_obj_size= asf_st->pkt.size;
762 }
763
764 if ( asf_st->pkt.size != asf->packet_obj_size
765 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
766 if(asf_st->pkt.data){
767 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
768 asf_st->frag_offset = 0;
769 av_free_packet(&asf_st->pkt);
770 }
771 /* new packet */
772 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
773 asf_st->seq = asf->packet_seq;
774 asf_st->pkt.dts = asf->packet_frag_timestamp;
775 asf_st->pkt.stream_index = asf->stream_index;
776 asf_st->pkt.pos =
777 asf_st->packet_pos= asf->packet_pos;
778 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
779 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
780 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
781 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
782 asf->packet_key_frame = 1;
783 if (asf->packet_key_frame)
784 asf_st->pkt.flags |= PKT_FLAG_KEY;
785 }
786
787 /* read data */
788 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
789 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
790 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
791 asf->packet_size_left -= asf->packet_frag_size;
792 if (asf->packet_size_left < 0)
793 continue;
794
795 if( asf->packet_frag_offset >= asf_st->pkt.size
796 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
797 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
798 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
799 continue;
800 }
801
802 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
803 asf->packet_frag_size);
804 if (s->key && s->keylen == 20)
805 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
806 asf->packet_frag_size);
807 asf_st->frag_offset += asf->packet_frag_size;
808 /* test if whole packet is read */
809 if (asf_st->frag_offset == asf_st->pkt.size) {
810 //workaround for macroshit radio DVR-MS files
811 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
812 && asf_st->pkt.size > 100){
813 int i;
814 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
815 if(i == asf_st->pkt.size){
816 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
817 asf_st->frag_offset = 0;
818 av_free_packet(&asf_st->pkt);
819 continue;
820 }
821 }
822
823 /* return packet */
824 if (asf_st->ds_span > 1) {
825 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
826 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);
827 }else{
828 /* packet descrambling */
829 uint8_t *newdata = av_malloc(asf_st->pkt.size);
830 if (newdata) {
831 int offset = 0;
832 while (offset < asf_st->pkt.size) {
833 int off = offset / asf_st->ds_chunk_size;
834 int row = off / asf_st->ds_span;
835 int col = off % asf_st->ds_span;
836 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
837 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
838
839 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
840 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
841 memcpy(newdata + offset,
842 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
843 asf_st->ds_chunk_size);
844 offset += asf_st->ds_chunk_size;
845 }
846 av_free(asf_st->pkt.data);
847 asf_st->pkt.data = newdata;
848 }
849 }
850 }
851 asf_st->frag_offset = 0;
852 *pkt= asf_st->pkt;
853 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
854 asf_st->pkt.size = 0;
855 asf_st->pkt.data = 0;
856 break; // packet completed
857 }
858 }
859 return 0;
860 }
861
862 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
863 {
864 ASFContext *asf = s->priv_data;
865
866 for (;;) {
867 int ret;
868
869 /* parse cached packets, if any */
870 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
871 return ret;
872 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
873 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
874 asf->packet_time_start = 0;
875 }
876
877 return 0;
878 }
879
880 // Added to support seeking after packets have been read
881 // If information is not reset, read_packet fails due to
882 // leftover information from previous reads
883 static void asf_reset_header(AVFormatContext *s)
884 {
885 ASFContext *asf = s->priv_data;
886 ASFStream *asf_st;
887 int i;
888
889 asf->packet_nb_frames = 0;
890 asf->packet_size_left = 0;
891 asf->packet_segments = 0;
892 asf->packet_flags = 0;
893 asf->packet_property = 0;
894 asf->packet_timestamp = 0;
895 asf->packet_segsizetype = 0;
896 asf->packet_segments = 0;
897 asf->packet_seq = 0;
898 asf->packet_replic_size = 0;
899 asf->packet_key_frame = 0;
900 asf->packet_padsize = 0;
901 asf->packet_frag_offset = 0;
902 asf->packet_frag_size = 0;
903 asf->packet_frag_timestamp = 0;
904 asf->packet_multi_size = 0;
905 asf->packet_obj_size = 0;
906 asf->packet_time_delta = 0;
907 asf->packet_time_start = 0;
908
909 for(i=0; i<s->nb_streams; i++){
910 asf_st= s->streams[i]->priv_data;
911 av_free_packet(&asf_st->pkt);
912 asf_st->frag_offset=0;
913 asf_st->seq=0;
914 }
915 asf->asf_st= NULL;
916 }
917
918 static int asf_read_close(AVFormatContext *s)
919 {
920 int i;
921
922 asf_reset_header(s);
923 for(i=0;i<s->nb_streams;i++) {
924 AVStream *st = s->streams[i];
925 av_free(st->codec->palctrl);
926 }
927 return 0;
928 }
929
930 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
931 {
932 ASFContext *asf = s->priv_data;
933 AVPacket pkt1, *pkt = &pkt1;
934 ASFStream *asf_st;
935 int64_t pts;
936 int64_t pos= *ppos;
937 int i;
938 int64_t start_pos[s->nb_streams];
939
940 for(i=0; i<s->nb_streams; i++){
941 start_pos[i]= pos;
942 }
943
944 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
945 *ppos= pos;
946 url_fseek(s->pb, pos, SEEK_SET);
947
948 //printf("asf_read_pts\n");
949 asf_reset_header(s);
950 for(;;){
951 if (av_read_frame(s, pkt) < 0){
952 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
953 return AV_NOPTS_VALUE;
954 }
955
956 pts= pkt->pts;
957
958 av_free_packet(pkt);
959 if(pkt->flags&PKT_FLAG_KEY){
960 i= pkt->stream_index;
961
962 asf_st= s->streams[i]->priv_data;
963
964 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
965 pos= asf_st->packet_pos;
966
967 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
968 start_pos[i]= asf_st->packet_pos + 1;
969
970 if(pkt->stream_index == stream_index)
971 break;
972 }
973 }
974
975 *ppos= pos;
976 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
977
978 return pts;
979 }
980
981 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
982 {
983 GUID g;
984 ASFContext *asf = s->priv_data;
985 int64_t gsize, itime;
986 int64_t pos, current_pos, index_pts;
987 int i;
988 int pct,ict;
989
990 current_pos = url_ftell(s->pb);
991
992 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
993 get_guid(s->pb, &g);
994 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
995 gsize = get_le64(s->pb);
996 get_guid(s->pb, &g);
997 itime=get_le64(s->pb);
998 pct=get_le32(s->pb);
999 ict=get_le32(s->pb);
1000 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1001
1002 for (i=0;i<ict;i++){
1003 int pktnum=get_le32(s->pb);
1004 int pktct =get_le16(s->pb);
1005 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1006
1007 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1008 index_pts=av_rescale(itime, i, 10000);
1009
1010 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1011 }
1012 asf->index_read= 1;
1013 }
1014 url_fseek(s->pb, current_pos, SEEK_SET);
1015 }
1016
1017 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1018 {
1019 ASFContext *asf = s->priv_data;
1020 AVStream *st = s->streams[stream_index];
1021 int64_t pos;
1022 int index;
1023
1024 if (asf->packet_size <= 0)
1025 return -1;
1026
1027 /* Try using the protocol's read_seek if available */
1028 if(s->pb) {
1029 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1030 if(ret >= 0)
1031 asf_reset_header(s);
1032 if (ret != AVERROR(ENOSYS))
1033 return ret;
1034 }
1035
1036 if (!asf->index_read)
1037 asf_build_simple_index(s, stream_index);
1038
1039 if(!(asf->index_read && st->index_entries)){
1040 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1041 return -1;
1042 }else{
1043 index= av_index_search_timestamp(st, pts, flags);
1044 if(index<0)
1045 return -1;
1046
1047 /* find the position */
1048 pos = st->index_entries[index].pos;
1049 pts = st->index_entries[index].timestamp;
1050
1051 // various attempts to find key frame have failed so far
1052 // asf_reset_header(s);
1053 // url_fseek(s->pb, pos, SEEK_SET);
1054 // key_pos = pos;
1055 // for(i=0;i<16;i++){
1056 // pos = url_ftell(s->pb);
1057 // if (av_read_frame(s, &pkt) < 0){
1058 // av_log(s, AV_LOG_INFO, "seek failed\n");
1059 // return -1;
1060 // }
1061 // asf_st = s->streams[stream_index]->priv_data;
1062 // pos += st->parser->frame_offset;
1063 //
1064 // if (pkt.size > b) {
1065 // b = pkt.size;
1066 // key_pos = pos;
1067 // }
1068 //
1069 // av_free_packet(&pkt);
1070 // }
1071
1072 /* do the seek */
1073 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1074 url_fseek(s->pb, pos, SEEK_SET);
1075 }
1076 asf_reset_header(s);
1077 return 0;
1078 }
1079
1080 AVInputFormat asf_demuxer = {
1081 "asf",
1082 NULL_IF_CONFIG_SMALL("ASF format"),
1083 sizeof(ASFContext),
1084 asf_probe,
1085 asf_read_header,
1086 asf_read_packet,
1087 asf_read_close,
1088 asf_read_seek,
1089 asf_read_pts,
1090 .metadata_conv = ff_asf_metadata_conv,
1091 };
lucabe's unfinished and experimental patches for ffmpeg