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cosmetics: line wrap and vertical alignment
[FFMpeg-mirror/lagarith.git] / libavformat / asfdec.c
blobe76f98beb240529db9422d9f9152ebff1823f8e5
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 ff_asf_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 ff_asf_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 (!guidcmp(g, &cmp)) \
52 dprintf(NULL, "(GUID: %s) ", #cmp)
53
54 static void print_guid(const ff_asf_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 int guidcmp(const void *g1, const void *g2)
91 {
92 return memcmp(g1, g2, sizeof(ff_asf_guid));
93 }
94
95 static void get_guid(ByteIOContext *s, ff_asf_guid *g)
96 {
97 assert(sizeof(*g) == 16);
98 get_buffer(s, *g, sizeof(*g));
99 }
100
101 #if 0
102 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
103 {
104 int len, c;
105 char *q;
106
107 len = get_le16(pb);
108 q = buf;
109 while (len > 0) {
110 c = get_le16(pb);
111 if ((q - buf) < buf_size - 1)
112 *q++ = c;
113 len--;
114 }
115 *q = '\0';
116 }
117 #endif
118
119 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
120 {
121 char* q = buf;
122 len /= 2;
123 while (len--) {
124 uint8_t tmp;
125 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
126 }
127 *q = '\0';
128 }
129
130 static int asf_probe(AVProbeData *pd)
131 {
132 /* check file header */
133 if (!guidcmp(pd->buf, &ff_asf_header))
134 return AVPROBE_SCORE_MAX;
135 else
136 return 0;
137 }
138
139 static int get_value(ByteIOContext *pb, int type){
140 switch(type){
141 case 2: return get_le32(pb);
142 case 3: return get_le32(pb);
143 case 4: return get_le64(pb);
144 case 5: return get_le16(pb);
145 default:return INT_MIN;
146 }
147 }
148
149 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
150 {
151 char value[1024];
152 if (type <= 1) { // unicode or byte
153 get_str16_nolen(s->pb, len, value, sizeof(value));
154 } else if (type <= 5) { // boolean or DWORD or QWORD or WORD
155 uint64_t num = get_value(s->pb, type);
156 snprintf(value, sizeof(value), "%"PRIu64, num);
157 } else {
158 url_fskip(s->pb, len);
159 return;
160 }
161 if (!strncmp(key, "WM/", 3))
162 key += 3;
163 av_metadata_set(&s->metadata, key, value);
164 }
165
166 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
167 {
168 ASFContext *asf = s->priv_data;
169 ff_asf_guid g;
170 ByteIOContext *pb = s->pb;
171 AVStream *st;
172 ASFStream *asf_st;
173 int size, i;
174 int64_t gsize;
175 AVRational dar[128];
176 uint32_t bitrate[128];
177
178 memset(dar, 0, sizeof(dar));
179 memset(bitrate, 0, sizeof(bitrate));
180
181 get_guid(pb, &g);
182 if (guidcmp(&g, &ff_asf_header))
183 return -1;
184 get_le64(pb);
185 get_le32(pb);
186 get_byte(pb);
187 get_byte(pb);
188 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
189 for(;;) {
190 get_guid(pb, &g);
191 gsize = get_le64(pb);
192 dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
193 print_guid(&g);
194 dprintf(s, " size=0x%"PRIx64"\n", gsize);
195 if (!guidcmp(&g, &ff_asf_data_header)) {
196 asf->data_object_offset = url_ftell(pb);
197 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
198 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
199 asf->data_object_size = gsize - 24;
200 } else {
201 asf->data_object_size = (uint64_t)-1;
202 }
203 break;
204 }
205 if (gsize < 24)
206 return -1;
207 if (!guidcmp(&g, &ff_asf_file_header)) {
208 get_guid(pb, &asf->hdr.guid);
209 asf->hdr.file_size = get_le64(pb);
210 asf->hdr.create_time = get_le64(pb);
211 asf->nb_packets = get_le64(pb);
212 asf->hdr.play_time = get_le64(pb);
213 asf->hdr.send_time = get_le64(pb);
214 asf->hdr.preroll = get_le32(pb);
215 asf->hdr.ignore = get_le32(pb);
216 asf->hdr.flags = get_le32(pb);
217 asf->hdr.min_pktsize = get_le32(pb);
218 asf->hdr.max_pktsize = get_le32(pb);
219 asf->hdr.max_bitrate = get_le32(pb);
220 asf->packet_size = asf->hdr.max_pktsize;
221 } else if (!guidcmp(&g, &ff_asf_stream_header)) {
222 enum CodecType type;
223 int type_specific_size, sizeX;
224 uint64_t total_size;
225 unsigned int tag1;
226 int64_t pos1, pos2, start_time;
227 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
228
229 pos1 = url_ftell(pb);
230
231 st = av_new_stream(s, 0);
232 if (!st)
233 return AVERROR(ENOMEM);
234 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
235 asf_st = av_mallocz(sizeof(ASFStream));
236 if (!asf_st)
237 return AVERROR(ENOMEM);
238 st->priv_data = asf_st;
239 start_time = asf->hdr.preroll;
240
241 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
242 st->duration = asf->hdr.send_time /
243 (10000000 / 1000) - start_time;
244 }
245 get_guid(pb, &g);
246
247 test_for_ext_stream_audio = 0;
248 if (!guidcmp(&g, &ff_asf_audio_stream)) {
249 type = CODEC_TYPE_AUDIO;
250 } else if (!guidcmp(&g, &ff_asf_video_stream)) {
251 type = CODEC_TYPE_VIDEO;
252 } else if (!guidcmp(&g, &ff_asf_command_stream)) {
253 type = CODEC_TYPE_DATA;
254 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
255 test_for_ext_stream_audio = 1;
256 type = CODEC_TYPE_UNKNOWN;
257 } else {
258 return -1;
259 }
260 get_guid(pb, &g);
261 total_size = get_le64(pb);
262 type_specific_size = get_le32(pb);
263 get_le32(pb);
264 st->id = get_le16(pb) & 0x7f; /* stream id */
265 // mapping of asf ID to AV stream ID;
266 asf->asfid2avid[st->id] = s->nb_streams - 1;
267
268 get_le32(pb);
269
270 if (test_for_ext_stream_audio) {
271 get_guid(pb, &g);
272 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
273 type = CODEC_TYPE_AUDIO;
274 is_dvr_ms_audio=1;
275 get_guid(pb, &g);
276 get_le32(pb);
277 get_le32(pb);
278 get_le32(pb);
279 get_guid(pb, &g);
280 get_le32(pb);
281 }
282 }
283
284 st->codec->codec_type = type;
285 if (type == CODEC_TYPE_AUDIO) {
286 get_wav_header(pb, st->codec, type_specific_size);
287 if (is_dvr_ms_audio) {
288 // codec_id and codec_tag are unreliable in dvr_ms
289 // files. Set them later by probing stream.
290 st->codec->codec_id = CODEC_ID_PROBE;
291 st->codec->codec_tag = 0;
292 }
293 if (st->codec->codec_id == CODEC_ID_AAC) {
294 st->need_parsing = AVSTREAM_PARSE_NONE;
295 } else {
296 st->need_parsing = AVSTREAM_PARSE_FULL;
297 }
298 /* We have to init the frame size at some point .... */
299 pos2 = url_ftell(pb);
300 if (gsize >= (pos2 + 8 - pos1 + 24)) {
301 asf_st->ds_span = get_byte(pb);
302 asf_st->ds_packet_size = get_le16(pb);
303 asf_st->ds_chunk_size = get_le16(pb);
304 get_le16(pb); //ds_data_size
305 get_byte(pb); //ds_silence_data
306 }
307 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
308 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
309 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
310 if (asf_st->ds_span > 1) {
311 if (!asf_st->ds_chunk_size
312 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
313 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
314 asf_st->ds_span = 0; // disable descrambling
315 }
316 switch (st->codec->codec_id) {
317 case CODEC_ID_MP3:
318 st->codec->frame_size = MPA_FRAME_SIZE;
319 break;
320 case CODEC_ID_PCM_S16LE:
321 case CODEC_ID_PCM_S16BE:
322 case CODEC_ID_PCM_U16LE:
323 case CODEC_ID_PCM_U16BE:
324 case CODEC_ID_PCM_S8:
325 case CODEC_ID_PCM_U8:
326 case CODEC_ID_PCM_ALAW:
327 case CODEC_ID_PCM_MULAW:
328 st->codec->frame_size = 1;
329 break;
330 default:
331 /* This is probably wrong, but it prevents a crash later */
332 st->codec->frame_size = 1;
333 break;
334 }
335 } else if (type == CODEC_TYPE_VIDEO) {
336 get_le32(pb);
337 get_le32(pb);
338 get_byte(pb);
339 size = get_le16(pb); /* size */
340 sizeX= get_le32(pb); /* size */
341 st->codec->width = get_le32(pb);
342 st->codec->height = get_le32(pb);
343 /* not available for asf */
344 get_le16(pb); /* panes */
345 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
346 tag1 = get_le32(pb);
347 url_fskip(pb, 20);
348 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
349 size= sizeX;
350 if (size > 40) {
351 st->codec->extradata_size = size - 40;
352 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
353 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
354 }
355
356 /* Extract palette from extradata if bpp <= 8 */
357 /* This code assumes that extradata contains only palette */
358 /* This is true for all paletted codecs implemented in ffmpeg */
359 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
360 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
361 #ifdef WORDS_BIGENDIAN
362 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
363 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
364 #else
365 memcpy(st->codec->palctrl->palette, st->codec->extradata,
366 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
367 #endif
368 st->codec->palctrl->palette_changed = 1;
369 }
370
371 st->codec->codec_tag = tag1;
372 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
373 if(tag1 == MKTAG('D', 'V', 'R', ' '))
374 st->need_parsing = AVSTREAM_PARSE_FULL;
375 }
376 pos2 = url_ftell(pb);
377 url_fskip(pb, gsize - (pos2 - pos1 + 24));
378 } else if (!guidcmp(&g, &ff_asf_comment_header)) {
379 int len1, len2, len3, len4, len5;
380
381 len1 = get_le16(pb);
382 len2 = get_le16(pb);
383 len3 = get_le16(pb);
384 len4 = get_le16(pb);
385 len5 = get_le16(pb);
386 get_tag(s, "title" , 0, len1);
387 get_tag(s, "author" , 0, len2);
388 get_tag(s, "copyright", 0, len3);
389 get_tag(s, "comment" , 0, len4);
390 url_fskip(pb, len5);
391 } else if (!guidcmp(&g, &stream_bitrate_guid)) {
392 int stream_count = get_le16(pb);
393 int j;
394
395 // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
396 // av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
397 for(j = 0; j < stream_count; j++) {
398 int flags, bitrate, stream_id;
399
400 flags= get_le16(pb);
401 bitrate= get_le32(pb);
402 stream_id= (flags & 0x7f);
403 // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
404 asf->stream_bitrates[stream_id]= bitrate;
405 }
406 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
407 int desc_count, i;
408
409 desc_count = get_le16(pb);
410 for(i=0;i<desc_count;i++) {
411 int name_len,value_type,value_len;
412 char name[1024];
413
414 name_len = get_le16(pb);
415 get_str16_nolen(pb, name_len, name, sizeof(name));
416 value_type = get_le16(pb);
417 value_len = get_le16(pb);
418 get_tag(s, name, value_type, value_len);
419 }
420 } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
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(s, 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 (!guidcmp(&g, &ff_asf_ext_stream_header)) {
444 int ext_len, payload_ext_ct, stream_ct;
445 uint32_t ext_d, leak_rate, stream_num;
446
447 get_le64(pb); // starttime
448 get_le64(pb); // endtime
449 leak_rate = get_le32(pb); // leak-datarate
450 get_le32(pb); // bucket-datasize
451 get_le32(pb); // init-bucket-fullness
452 get_le32(pb); // alt-leak-datarate
453 get_le32(pb); // alt-bucket-datasize
454 get_le32(pb); // alt-init-bucket-fullness
455 get_le32(pb); // max-object-size
456 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
457 stream_num = get_le16(pb); // stream-num
458 get_le16(pb); // stream-language-id-index
459 get_le64(pb); // avg frametime in 100ns units
460 stream_ct = get_le16(pb); //stream-name-count
461 payload_ext_ct = get_le16(pb); //payload-extension-system-count
462
463 if (stream_num < 128)
464 bitrate[stream_num] = leak_rate;
465
466 for (i=0; i<stream_ct; i++){
467 get_le16(pb);
468 ext_len = get_le16(pb);
469 url_fseek(pb, ext_len, SEEK_CUR);
470 }
471
472 for (i=0; i<payload_ext_ct; i++){
473 get_guid(pb, &g);
474 ext_d=get_le16(pb);
475 ext_len=get_le32(pb);
476 url_fseek(pb, ext_len, SEEK_CUR);
477 }
478
479 // there could be a optional stream properties object to follow
480 // if so the next iteration will pick it up
481 } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
482 int v1, v2;
483 get_guid(pb, &g);
484 v1 = get_le32(pb);
485 v2 = get_le16(pb);
486 #if 0
487 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
488 int len, v1, n, num;
489 char str[256], *q;
490 char tag[16];
491
492 get_guid(pb, &g);
493 print_guid(&g);
494
495 n = get_le32(pb);
496 for(i=0;i<n;i++) {
497 num = get_le16(pb); /* stream number */
498 get_str16(pb, str, sizeof(str));
499 get_str16(pb, str, sizeof(str));
500 len = get_le16(pb);
501 q = tag;
502 while (len > 0) {
503 v1 = get_byte(pb);
504 if ((q - tag) < sizeof(tag) - 1)
505 *q++ = v1;
506 len--;
507 }
508 *q = '\0';
509 }
510 #endif
511 } else if (url_feof(pb)) {
512 return -1;
513 } else {
514 url_fseek(pb, gsize - 24, SEEK_CUR);
515 }
516 }
517 get_guid(pb, &g);
518 get_le64(pb);
519 get_byte(pb);
520 get_byte(pb);
521 if (url_feof(pb))
522 return -1;
523 asf->data_offset = url_ftell(pb);
524 asf->packet_size_left = 0;
525
526
527 for(i=0; i<128; i++){
528 int stream_num= asf->asfid2avid[i];
529 if(stream_num>=0){
530 AVStream *st = s->streams[stream_num];
531 if (!st->codec->bit_rate)
532 st->codec->bit_rate = bitrate[i];
533 if (dar[i].num > 0 && dar[i].den > 0)
534 av_reduce(&st->sample_aspect_ratio.num,
535 &st->sample_aspect_ratio.den,
536 dar[i].num, dar[i].den, INT_MAX);
537 //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);
538 }
539 }
540
541 return 0;
542 }
543
544 #define DO_2BITS(bits, var, defval) \
545 switch (bits & 3) \
546 { \
547 case 3: var = get_le32(pb); rsize += 4; break; \
548 case 2: var = get_le16(pb); rsize += 2; break; \
549 case 1: var = get_byte(pb); rsize++; break; \
550 default: var = defval; break; \
551 }
552
553 int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
554 {
555 ASFContext *asf = s->priv_data;
556 uint32_t packet_length, padsize;
557 int rsize = 8;
558 int c, d, e, off;
559
560 off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
561
562 c=d=e=-1;
563 while(off-- > 0){
564 c=d; d=e;
565 e= get_byte(pb);
566 if(c == 0x82 && !d && !e)
567 break;
568 }
569
570 if (c != 0x82) {
571 if (!url_feof(pb))
572 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
573 }
574 if ((c & 0x8f) == 0x82) {
575 if (d || e) {
576 if (!url_feof(pb))
577 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
578 return -1;
579 }
580 c= get_byte(pb);
581 d= get_byte(pb);
582 rsize+=3;
583 }else{
584 url_fseek(pb, -1, SEEK_CUR); //FIXME
585 }
586
587 asf->packet_flags = c;
588 asf->packet_property = d;
589
590 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
591 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
592 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
593
594 //the following checks prevent overflows and infinite loops
595 if(packet_length >= (1U<<29)){
596 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
597 return -1;
598 }
599 if(padsize >= packet_length){
600 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
601 return -1;
602 }
603
604 asf->packet_timestamp = get_le32(pb);
605 get_le16(pb); /* duration */
606 // rsize has at least 11 bytes which have to be present
607
608 if (asf->packet_flags & 0x01) {
609 asf->packet_segsizetype = get_byte(pb); rsize++;
610 asf->packet_segments = asf->packet_segsizetype & 0x3f;
611 } else {
612 asf->packet_segments = 1;
613 asf->packet_segsizetype = 0x80;
614 }
615 asf->packet_size_left = packet_length - padsize - rsize;
616 if (packet_length < asf->hdr.min_pktsize)
617 padsize += asf->hdr.min_pktsize - packet_length;
618 asf->packet_padsize = padsize;
619 dprintf(s, "packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
620 return 0;
621 }
622
623 /**
624 *
625 * @return <0 if error
626 */
627 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
628 ASFContext *asf = s->priv_data;
629 int rsize = 1;
630 int num = get_byte(pb);
631 int64_t ts0, ts1;
632
633 asf->packet_segments--;
634 asf->packet_key_frame = num >> 7;
635 asf->stream_index = asf->asfid2avid[num & 0x7f];
636 // sequence should be ignored!
637 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
638 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
639 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
640 //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);
641 if (asf->packet_replic_size >= 8) {
642 asf->packet_obj_size = get_le32(pb);
643 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
644 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
645 return -1;
646 }
647 asf->packet_frag_timestamp = get_le32(pb); // timestamp
648 if(asf->packet_replic_size >= 8+38+4){
649 // for(i=0; i<asf->packet_replic_size-8; i++)
650 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
651 // av_log(s, AV_LOG_DEBUG, "\n");
652 url_fskip(pb, 10);
653 ts0= get_le64(pb);
654 ts1= get_le64(pb);
655 url_fskip(pb, 12);
656 get_le32(pb);
657 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
658 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
659 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
660 }else
661 url_fskip(pb, asf->packet_replic_size - 8);
662 rsize += asf->packet_replic_size; // FIXME - check validity
663 } else if (asf->packet_replic_size==1){
664 // multipacket - frag_offset is beginning timestamp
665 asf->packet_time_start = asf->packet_frag_offset;
666 asf->packet_frag_offset = 0;
667 asf->packet_frag_timestamp = asf->packet_timestamp;
668
669 asf->packet_time_delta = get_byte(pb);
670 rsize++;
671 }else if(asf->packet_replic_size!=0){
672 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
673 return -1;
674 }
675 if (asf->packet_flags & 0x01) {
676 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
677 if(asf->packet_frag_size > asf->packet_size_left - rsize){
678 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
679 return -1;
680 }
681 //printf("Fragsize %d\n", asf->packet_frag_size);
682 } else {
683 asf->packet_frag_size = asf->packet_size_left - rsize;
684 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
685 }
686 if (asf->packet_replic_size == 1) {
687 asf->packet_multi_size = asf->packet_frag_size;
688 if (asf->packet_multi_size > asf->packet_size_left)
689 return -1;
690 }
691 asf->packet_size_left -= rsize;
692 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
693
694 return 0;
695 }
696
697 int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
698 {
699 ASFContext *asf = s->priv_data;
700 ASFStream *asf_st = 0;
701 for (;;) {
702 if(url_feof(pb))
703 return AVERROR_EOF;
704 if (asf->packet_size_left < FRAME_HEADER_SIZE
705 || asf->packet_segments < 1) {
706 //asf->packet_size_left <= asf->packet_padsize) {
707 int ret = asf->packet_size_left + asf->packet_padsize;
708 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
709 assert(ret>=0);
710 /* fail safe */
711 url_fskip(pb, ret);
712
713 asf->packet_pos= url_ftell(pb);
714 if (asf->data_object_size != (uint64_t)-1 &&
715 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
716 return AVERROR_EOF; /* Do not exceed the size of the data object */
717 return 1;
718 }
719 if (asf->packet_time_start == 0) {
720 if(asf_read_frame_header(s, pb) < 0){
721 asf->packet_segments= 0;
722 continue;
723 }
724 if (asf->stream_index < 0
725 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
726 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
727 ) {
728 asf->packet_time_start = 0;
729 /* unhandled packet (should not happen) */
730 url_fskip(pb, asf->packet_frag_size);
731 asf->packet_size_left -= asf->packet_frag_size;
732 if(asf->stream_index < 0)
733 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
734 continue;
735 }
736 asf->asf_st = s->streams[asf->stream_index]->priv_data;
737 }
738 asf_st = asf->asf_st;
739
740 if (asf->packet_replic_size == 1) {
741 // frag_offset is here used as the beginning timestamp
742 asf->packet_frag_timestamp = asf->packet_time_start;
743 asf->packet_time_start += asf->packet_time_delta;
744 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
745 asf->packet_size_left--;
746 asf->packet_multi_size--;
747 if (asf->packet_multi_size < asf->packet_obj_size)
748 {
749 asf->packet_time_start = 0;
750 url_fskip(pb, asf->packet_multi_size);
751 asf->packet_size_left -= asf->packet_multi_size;
752 continue;
753 }
754 asf->packet_multi_size -= asf->packet_obj_size;
755 //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);
756 }
757 if( /*asf->packet_frag_size == asf->packet_obj_size*/
758 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
759 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
760 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
761 asf_st->frag_offset, asf->packet_frag_size,
762 asf->packet_obj_size, asf_st->pkt.size);
763 asf->packet_obj_size= asf_st->pkt.size;
764 }
765
766 if ( asf_st->pkt.size != asf->packet_obj_size
767 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
768 if(asf_st->pkt.data){
769 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
770 asf_st->frag_offset = 0;
771 av_free_packet(&asf_st->pkt);
772 }
773 /* new packet */
774 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
775 asf_st->seq = asf->packet_seq;
776 asf_st->pkt.dts = asf->packet_frag_timestamp;
777 asf_st->pkt.stream_index = asf->stream_index;
778 asf_st->pkt.pos =
779 asf_st->packet_pos= asf->packet_pos;
780 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
781 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
782 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
783 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
784 asf->packet_key_frame = 1;
785 if (asf->packet_key_frame)
786 asf_st->pkt.flags |= PKT_FLAG_KEY;
787 }
788
789 /* read data */
790 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
791 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
792 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
793 asf->packet_size_left -= asf->packet_frag_size;
794 if (asf->packet_size_left < 0)
795 continue;
796
797 if( asf->packet_frag_offset >= asf_st->pkt.size
798 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
799 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
800 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
801 continue;
802 }
803
804 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
805 asf->packet_frag_size);
806 if (s->key && s->keylen == 20)
807 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
808 asf->packet_frag_size);
809 asf_st->frag_offset += asf->packet_frag_size;
810 /* test if whole packet is read */
811 if (asf_st->frag_offset == asf_st->pkt.size) {
812 //workaround for macroshit radio DVR-MS files
813 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
814 && asf_st->pkt.size > 100){
815 int i;
816 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
817 if(i == asf_st->pkt.size){
818 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
819 asf_st->frag_offset = 0;
820 av_free_packet(&asf_st->pkt);
821 continue;
822 }
823 }
824
825 /* return packet */
826 if (asf_st->ds_span > 1) {
827 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
828 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);
829 }else{
830 /* packet descrambling */
831 uint8_t *newdata = av_malloc(asf_st->pkt.size);
832 if (newdata) {
833 int offset = 0;
834 while (offset < asf_st->pkt.size) {
835 int off = offset / asf_st->ds_chunk_size;
836 int row = off / asf_st->ds_span;
837 int col = off % asf_st->ds_span;
838 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
839 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
840
841 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
842 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
843 memcpy(newdata + offset,
844 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
845 asf_st->ds_chunk_size);
846 offset += asf_st->ds_chunk_size;
847 }
848 av_free(asf_st->pkt.data);
849 asf_st->pkt.data = newdata;
850 }
851 }
852 }
853 asf_st->frag_offset = 0;
854 *pkt= asf_st->pkt;
855 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
856 asf_st->pkt.size = 0;
857 asf_st->pkt.data = 0;
858 break; // packet completed
859 }
860 }
861 return 0;
862 }
863
864 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
865 {
866 ASFContext *asf = s->priv_data;
867
868 for (;;) {
869 int ret;
870
871 /* parse cached packets, if any */
872 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
873 return ret;
874 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
875 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
876 asf->packet_time_start = 0;
877 }
878
879 return 0;
880 }
881
882 // Added to support seeking after packets have been read
883 // If information is not reset, read_packet fails due to
884 // leftover information from previous reads
885 static void asf_reset_header(AVFormatContext *s)
886 {
887 ASFContext *asf = s->priv_data;
888 ASFStream *asf_st;
889 int i;
890
891 asf->packet_nb_frames = 0;
892 asf->packet_size_left = 0;
893 asf->packet_segments = 0;
894 asf->packet_flags = 0;
895 asf->packet_property = 0;
896 asf->packet_timestamp = 0;
897 asf->packet_segsizetype = 0;
898 asf->packet_segments = 0;
899 asf->packet_seq = 0;
900 asf->packet_replic_size = 0;
901 asf->packet_key_frame = 0;
902 asf->packet_padsize = 0;
903 asf->packet_frag_offset = 0;
904 asf->packet_frag_size = 0;
905 asf->packet_frag_timestamp = 0;
906 asf->packet_multi_size = 0;
907 asf->packet_obj_size = 0;
908 asf->packet_time_delta = 0;
909 asf->packet_time_start = 0;
910
911 for(i=0; i<s->nb_streams; i++){
912 asf_st= s->streams[i]->priv_data;
913 av_free_packet(&asf_st->pkt);
914 asf_st->frag_offset=0;
915 asf_st->seq=0;
916 }
917 asf->asf_st= NULL;
918 }
919
920 static int asf_read_close(AVFormatContext *s)
921 {
922 int i;
923
924 asf_reset_header(s);
925 for(i=0;i<s->nb_streams;i++) {
926 AVStream *st = s->streams[i];
927 av_free(st->codec->palctrl);
928 }
929 return 0;
930 }
931
932 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
933 {
934 ASFContext *asf = s->priv_data;
935 AVPacket pkt1, *pkt = &pkt1;
936 ASFStream *asf_st;
937 int64_t pts;
938 int64_t pos= *ppos;
939 int i;
940 int64_t start_pos[s->nb_streams];
941
942 for(i=0; i<s->nb_streams; i++){
943 start_pos[i]= pos;
944 }
945
946 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
947 *ppos= pos;
948 url_fseek(s->pb, pos, SEEK_SET);
949
950 //printf("asf_read_pts\n");
951 asf_reset_header(s);
952 for(;;){
953 if (av_read_frame(s, pkt) < 0){
954 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
955 return AV_NOPTS_VALUE;
956 }
957
958 pts= pkt->pts;
959
960 av_free_packet(pkt);
961 if(pkt->flags&PKT_FLAG_KEY){
962 i= pkt->stream_index;
963
964 asf_st= s->streams[i]->priv_data;
965
966 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
967 pos= asf_st->packet_pos;
968
969 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
970 start_pos[i]= asf_st->packet_pos + 1;
971
972 if(pkt->stream_index == stream_index)
973 break;
974 }
975 }
976
977 *ppos= pos;
978 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
979
980 return pts;
981 }
982
983 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
984 {
985 ff_asf_guid g;
986 ASFContext *asf = s->priv_data;
987 int64_t current_pos= url_ftell(s->pb);
988 int i;
989
990 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
991 get_guid(s->pb, &g);
992 if (!guidcmp(&g, &index_guid)) {
993 int64_t itime;
994 int pct, ict;
995 int64_t av_unused 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 int64_t pos = s->data_offset + asf->packet_size*(int64_t)pktnum;
1006 int64_t index_pts= av_rescale(itime, i, 10000);
1007
1008 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1009 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1010 }
1011 asf->index_read= 1;
1012 }
1013 url_fseek(s->pb, current_pos, SEEK_SET);
1014 }
1015
1016 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1017 {
1018 ASFContext *asf = s->priv_data;
1019 AVStream *st = s->streams[stream_index];
1020 int64_t pos;
1021 int index;
1022
1023 if (asf->packet_size <= 0)
1024 return -1;
1025
1026 /* Try using the protocol's read_seek if available */
1027 if(s->pb) {
1028 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1029 if(ret >= 0)
1030 asf_reset_header(s);
1031 if (ret != AVERROR(ENOSYS))
1032 return ret;
1033 }
1034
1035 if (!asf->index_read)
1036 asf_build_simple_index(s, stream_index);
1037
1038 if(!(asf->index_read && st->index_entries)){
1039 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1040 return -1;
1041 }else{
1042 index= av_index_search_timestamp(st, pts, flags);
1043 if(index<0)
1044 return -1;
1045
1046 /* find the position */
1047 pos = st->index_entries[index].pos;
1048
1049 // various attempts to find key frame have failed so far
1050 // asf_reset_header(s);
1051 // url_fseek(s->pb, pos, SEEK_SET);
1052 // key_pos = pos;
1053 // for(i=0;i<16;i++){
1054 // pos = url_ftell(s->pb);
1055 // if (av_read_frame(s, &pkt) < 0){
1056 // av_log(s, AV_LOG_INFO, "seek failed\n");
1057 // return -1;
1058 // }
1059 // asf_st = s->streams[stream_index]->priv_data;
1060 // pos += st->parser->frame_offset;
1061 //
1062 // if (pkt.size > b) {
1063 // b = pkt.size;
1064 // key_pos = pos;
1065 // }
1066 //
1067 // av_free_packet(&pkt);
1068 // }
1069
1070 /* do the seek */
1071 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1072 url_fseek(s->pb, pos, SEEK_SET);
1073 }
1074 asf_reset_header(s);
1075 return 0;
1076 }
1077
1078 AVInputFormat asf_demuxer = {
1079 "asf",
1080 NULL_IF_CONFIG_SMALL("ASF format"),
1081 sizeof(ASFContext),
1082 asf_probe,
1083 asf_read_header,
1084 asf_read_packet,
1085 asf_read_close,
1086 asf_read_seek,
1087 asf_read_pts,
1088 .metadata_conv = ff_asf_metadata_conv,
1089 };
ffmpeg Lagarith lossless decoder