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Rename var: val -> energy
[FFMpeg-mirror/DVCPRO-HD.git] / libavformat / asf.c
blob20fe91790065c30df497617e397f039c9993da71
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 goto fail;
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 goto fail;
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 goto fail;
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 goto fail;
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 goto fail;
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 goto fail;
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 goto fail;
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 fail:
548 for(i=0;i<s->nb_streams;i++) {
549 AVStream *st = s->streams[i];
550 if (st) {
551 av_free(st->priv_data);
552 av_free(st->codec->extradata);
553 }
554 av_free(st);
555 }
556 return -1;
557 }
558
559 #define DO_2BITS(bits, var, defval) \
560 switch (bits & 3) \
561 { \
562 case 3: var = get_le32(pb); rsize += 4; break; \
563 case 2: var = get_le16(pb); rsize += 2; break; \
564 case 1: var = get_byte(pb); rsize++; break; \
565 default: var = defval; break; \
566 }
567
568 /**
569 *
570 * @return <0 in case of an error
571 */
572 static int asf_get_packet(AVFormatContext *s)
573 {
574 ASFContext *asf = s->priv_data;
575 ByteIOContext *pb = s->pb;
576 uint32_t packet_length, padsize;
577 int rsize = 8;
578 int c, d, e, off;
579
580 off= (url_ftell(s->pb) - s->data_offset) % asf->packet_size + 3;
581
582 c=d=e=-1;
583 while(off-- > 0){
584 c=d; d=e;
585 e= get_byte(pb);
586 if(c == 0x82 && !d && !e)
587 break;
588 }
589
590 if (c != 0x82) {
591 if (!url_feof(pb))
592 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
593 }
594 if ((c & 0x8f) == 0x82) {
595 if (d || e) {
596 if (!url_feof(pb))
597 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
598 return -1;
599 }
600 c= get_byte(pb);
601 d= get_byte(pb);
602 rsize+=3;
603 }else{
604 url_fseek(pb, -1, SEEK_CUR); //FIXME
605 }
606
607 asf->packet_flags = c;
608 asf->packet_property = d;
609
610 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
611 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
612 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
613
614 //the following checks prevent overflows and infinite loops
615 if(packet_length >= (1U<<29)){
616 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
617 return -1;
618 }
619 if(padsize >= packet_length){
620 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
621 return -1;
622 }
623
624 asf->packet_timestamp = get_le32(pb);
625 get_le16(pb); /* duration */
626 // rsize has at least 11 bytes which have to be present
627
628 if (asf->packet_flags & 0x01) {
629 asf->packet_segsizetype = get_byte(pb); rsize++;
630 asf->packet_segments = asf->packet_segsizetype & 0x3f;
631 } else {
632 asf->packet_segments = 1;
633 asf->packet_segsizetype = 0x80;
634 }
635 asf->packet_size_left = packet_length - padsize - rsize;
636 if (packet_length < asf->hdr.min_pktsize)
637 padsize += asf->hdr.min_pktsize - packet_length;
638 asf->packet_padsize = padsize;
639 #ifdef DEBUG
640 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
641 #endif
642 return 0;
643 }
644
645 /**
646 *
647 * @return <0 if error
648 */
649 static int asf_read_frame_header(AVFormatContext *s){
650 ASFContext *asf = s->priv_data;
651 ByteIOContext *pb = s->pb;
652 int rsize = 1;
653 int num = get_byte(pb);
654 int64_t ts0, ts1;
655
656 asf->packet_segments--;
657 asf->packet_key_frame = num >> 7;
658 asf->stream_index = asf->asfid2avid[num & 0x7f];
659 // sequence should be ignored!
660 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
661 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
662 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
663 //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);
664 if (asf->packet_replic_size >= 8) {
665 asf->packet_obj_size = get_le32(pb);
666 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
667 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
668 return -1;
669 }
670 asf->packet_frag_timestamp = get_le32(pb); // timestamp
671 if(asf->packet_replic_size >= 8+38+4){
672 // for(i=0; i<asf->packet_replic_size-8; i++)
673 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
674 // av_log(s, AV_LOG_DEBUG, "\n");
675 url_fskip(pb, 10);
676 ts0= get_le64(pb);
677 ts1= get_le64(pb);
678 url_fskip(pb, 12);
679 get_le32(pb);
680 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
681 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
682 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
683 }else
684 url_fskip(pb, asf->packet_replic_size - 8);
685 rsize += asf->packet_replic_size; // FIXME - check validity
686 } else if (asf->packet_replic_size==1){
687 // multipacket - frag_offset is beginning timestamp
688 asf->packet_time_start = asf->packet_frag_offset;
689 asf->packet_frag_offset = 0;
690 asf->packet_frag_timestamp = asf->packet_timestamp;
691
692 asf->packet_time_delta = get_byte(pb);
693 rsize++;
694 }else if(asf->packet_replic_size!=0){
695 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
696 return -1;
697 }
698 if (asf->packet_flags & 0x01) {
699 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
700 if(asf->packet_frag_size > asf->packet_size_left - rsize){
701 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
702 return -1;
703 }
704 //printf("Fragsize %d\n", asf->packet_frag_size);
705 } else {
706 asf->packet_frag_size = asf->packet_size_left - rsize;
707 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
708 }
709 if (asf->packet_replic_size == 1) {
710 asf->packet_multi_size = asf->packet_frag_size;
711 if (asf->packet_multi_size > asf->packet_size_left)
712 return -1;
713 }
714 asf->packet_size_left -= rsize;
715 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
716
717 return 0;
718 }
719
720 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
721 {
722 ASFContext *asf = s->priv_data;
723 ASFStream *asf_st = 0;
724 ByteIOContext *pb = s->pb;
725 //static int pc = 0;
726 for (;;) {
727 if(url_feof(pb))
728 return AVERROR(EIO);
729 if (asf->packet_size_left < FRAME_HEADER_SIZE
730 || asf->packet_segments < 1) {
731 //asf->packet_size_left <= asf->packet_padsize) {
732 int ret = asf->packet_size_left + asf->packet_padsize;
733 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
734 assert(ret>=0);
735 /* fail safe */
736 url_fskip(pb, ret);
737
738 asf->packet_pos= url_ftell(s->pb);
739 if (asf->data_object_size != (uint64_t)-1 &&
740 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
741 return AVERROR(EIO); /* Do not exceed the size of the data object */
742 ret = asf_get_packet(s);
743 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
744 if (ret < 0)
745 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
746 asf->packet_time_start = 0;
747 continue;
748 }
749 if (asf->packet_time_start == 0) {
750 if(asf_read_frame_header(s) < 0){
751 asf->packet_segments= 0;
752 continue;
753 }
754 if (asf->stream_index < 0
755 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
756 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
757 ) {
758 asf->packet_time_start = 0;
759 /* unhandled packet (should not happen) */
760 url_fskip(pb, asf->packet_frag_size);
761 asf->packet_size_left -= asf->packet_frag_size;
762 if(asf->stream_index < 0)
763 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
764 continue;
765 }
766 asf->asf_st = s->streams[asf->stream_index]->priv_data;
767 }
768 asf_st = asf->asf_st;
769
770 if (asf->packet_replic_size == 1) {
771 // frag_offset is here used as the beginning timestamp
772 asf->packet_frag_timestamp = asf->packet_time_start;
773 asf->packet_time_start += asf->packet_time_delta;
774 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
775 asf->packet_size_left--;
776 asf->packet_multi_size--;
777 if (asf->packet_multi_size < asf->packet_obj_size)
778 {
779 asf->packet_time_start = 0;
780 url_fskip(pb, asf->packet_multi_size);
781 asf->packet_size_left -= asf->packet_multi_size;
782 continue;
783 }
784 asf->packet_multi_size -= asf->packet_obj_size;
785 //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);
786 }
787 if( /*asf->packet_frag_size == asf->packet_obj_size*/
788 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
789 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
790 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
791 asf_st->frag_offset, asf->packet_frag_size,
792 asf->packet_obj_size, asf_st->pkt.size);
793 asf->packet_obj_size= asf_st->pkt.size;
794 }
795
796 if ( asf_st->pkt.size != asf->packet_obj_size
797 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
798 if(asf_st->pkt.data){
799 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
800 asf_st->frag_offset = 0;
801 av_free_packet(&asf_st->pkt);
802 }
803 /* new packet */
804 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
805 asf_st->seq = asf->packet_seq;
806 asf_st->pkt.pts = asf->packet_frag_timestamp;
807 asf_st->pkt.stream_index = asf->stream_index;
808 asf_st->pkt.pos =
809 asf_st->packet_pos= asf->packet_pos;
810 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
811 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
812 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
813 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
814 asf->packet_key_frame = 1;
815 if (asf->packet_key_frame)
816 asf_st->pkt.flags |= PKT_FLAG_KEY;
817 }
818
819 /* read data */
820 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
821 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
822 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
823 asf->packet_size_left -= asf->packet_frag_size;
824 if (asf->packet_size_left < 0)
825 continue;
826
827 if( asf->packet_frag_offset >= asf_st->pkt.size
828 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
829 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
830 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
831 continue;
832 }
833
834 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
835 asf->packet_frag_size);
836 if (s->key && s->keylen == 20)
837 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
838 asf->packet_frag_size);
839 asf_st->frag_offset += asf->packet_frag_size;
840 /* test if whole packet is read */
841 if (asf_st->frag_offset == asf_st->pkt.size) {
842 //workaround for macroshit radio DVR-MS files
843 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
844 && asf_st->pkt.size > 100){
845 int i;
846 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
847 if(i == asf_st->pkt.size){
848 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
849 asf_st->frag_offset = 0;
850 av_free_packet(&asf_st->pkt);
851 continue;
852 }
853 }
854
855 /* return packet */
856 if (asf_st->ds_span > 1) {
857 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
858 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);
859 }else{
860 /* packet descrambling */
861 uint8_t *newdata = av_malloc(asf_st->pkt.size);
862 if (newdata) {
863 int offset = 0;
864 while (offset < asf_st->pkt.size) {
865 int off = offset / asf_st->ds_chunk_size;
866 int row = off / asf_st->ds_span;
867 int col = off % asf_st->ds_span;
868 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
869 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
870
871 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
872 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
873 memcpy(newdata + offset,
874 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
875 asf_st->ds_chunk_size);
876 offset += asf_st->ds_chunk_size;
877 }
878 av_free(asf_st->pkt.data);
879 asf_st->pkt.data = newdata;
880 }
881 }
882 }
883 asf_st->frag_offset = 0;
884 *pkt= asf_st->pkt;
885 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
886 asf_st->pkt.size = 0;
887 asf_st->pkt.data = 0;
888 break; // packet completed
889 }
890 }
891 return 0;
892 }
893
894 // Added to support seeking after packets have been read
895 // If information is not reset, read_packet fails due to
896 // leftover information from previous reads
897 static void asf_reset_header(AVFormatContext *s)
898 {
899 ASFContext *asf = s->priv_data;
900 ASFStream *asf_st;
901 int i;
902
903 asf->packet_nb_frames = 0;
904 asf->packet_size_left = 0;
905 asf->packet_segments = 0;
906 asf->packet_flags = 0;
907 asf->packet_property = 0;
908 asf->packet_timestamp = 0;
909 asf->packet_segsizetype = 0;
910 asf->packet_segments = 0;
911 asf->packet_seq = 0;
912 asf->packet_replic_size = 0;
913 asf->packet_key_frame = 0;
914 asf->packet_padsize = 0;
915 asf->packet_frag_offset = 0;
916 asf->packet_frag_size = 0;
917 asf->packet_frag_timestamp = 0;
918 asf->packet_multi_size = 0;
919 asf->packet_obj_size = 0;
920 asf->packet_time_delta = 0;
921 asf->packet_time_start = 0;
922
923 for(i=0; i<s->nb_streams; i++){
924 asf_st= s->streams[i]->priv_data;
925 av_free_packet(&asf_st->pkt);
926 asf_st->frag_offset=0;
927 asf_st->seq=0;
928 }
929 asf->asf_st= NULL;
930 }
931
932 static int asf_read_close(AVFormatContext *s)
933 {
934 int i;
935
936 asf_reset_header(s);
937 for(i=0;i<s->nb_streams;i++) {
938 AVStream *st = s->streams[i];
939 av_free(st->priv_data);
940 av_free(st->codec->palctrl);
941 }
942 return 0;
943 }
944
945 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
946 {
947 ASFContext *asf = s->priv_data;
948 AVPacket pkt1, *pkt = &pkt1;
949 ASFStream *asf_st;
950 int64_t pts;
951 int64_t pos= *ppos;
952 int i;
953 int64_t start_pos[s->nb_streams];
954
955 for(i=0; i<s->nb_streams; i++){
956 start_pos[i]= pos;
957 }
958
959 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
960 *ppos= pos;
961 url_fseek(s->pb, pos, SEEK_SET);
962
963 //printf("asf_read_pts\n");
964 asf_reset_header(s);
965 for(;;){
966 if (av_read_frame(s, pkt) < 0){
967 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
968 return AV_NOPTS_VALUE;
969 }
970
971 pts= pkt->pts;
972
973 av_free_packet(pkt);
974 if(pkt->flags&PKT_FLAG_KEY){
975 i= pkt->stream_index;
976
977 asf_st= s->streams[i]->priv_data;
978
979 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
980 pos= asf_st->packet_pos;
981
982 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
983 start_pos[i]= asf_st->packet_pos + 1;
984
985 if(pkt->stream_index == stream_index)
986 break;
987 }
988 }
989
990 *ppos= pos;
991 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
992
993 return pts;
994 }
995
996 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
997 {
998 GUID g;
999 ASFContext *asf = s->priv_data;
1000 int64_t gsize, itime;
1001 int64_t pos, current_pos, index_pts;
1002 int i;
1003 int pct,ict;
1004
1005 current_pos = url_ftell(s->pb);
1006
1007 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1008 get_guid(s->pb, &g);
1009 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1010 gsize = get_le64(s->pb);
1011 get_guid(s->pb, &g);
1012 itime=get_le64(s->pb);
1013 pct=get_le32(s->pb);
1014 ict=get_le32(s->pb);
1015 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1016
1017 for (i=0;i<ict;i++){
1018 int pktnum=get_le32(s->pb);
1019 int pktct =get_le16(s->pb);
1020 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1021
1022 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1023 index_pts=av_rescale(itime, i, 10000);
1024
1025 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1026 }
1027 asf->index_read= 1;
1028 }
1029 url_fseek(s->pb, current_pos, SEEK_SET);
1030 }
1031
1032 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1033 {
1034 ASFContext *asf = s->priv_data;
1035 AVStream *st = s->streams[stream_index];
1036 int64_t pos;
1037 int index;
1038
1039 if (asf->packet_size <= 0)
1040 return -1;
1041
1042 /* Try using the protocol's read_seek if available */
1043 if(s->pb) {
1044 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1045 if(ret >= 0)
1046 asf_reset_header(s);
1047 if (ret != AVERROR(ENOSYS))
1048 return ret;
1049 }
1050
1051 if (!asf->index_read)
1052 asf_build_simple_index(s, stream_index);
1053
1054 if(!(asf->index_read && st->index_entries)){
1055 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1056 return -1;
1057 }else{
1058 index= av_index_search_timestamp(st, pts, flags);
1059 if(index<0)
1060 return -1;
1061
1062 /* find the position */
1063 pos = st->index_entries[index].pos;
1064 pts = st->index_entries[index].timestamp;
1065
1066 // various attempts to find key frame have failed so far
1067 // asf_reset_header(s);
1068 // url_fseek(s->pb, pos, SEEK_SET);
1069 // key_pos = pos;
1070 // for(i=0;i<16;i++){
1071 // pos = url_ftell(s->pb);
1072 // if (av_read_frame(s, &pkt) < 0){
1073 // av_log(s, AV_LOG_INFO, "seek failed\n");
1074 // return -1;
1075 // }
1076 // asf_st = s->streams[stream_index]->priv_data;
1077 // pos += st->parser->frame_offset;
1078 //
1079 // if (pkt.size > b) {
1080 // b = pkt.size;
1081 // key_pos = pos;
1082 // }
1083 //
1084 // av_free_packet(&pkt);
1085 // }
1086
1087 /* do the seek */
1088 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1089 url_fseek(s->pb, pos, SEEK_SET);
1090 }
1091 asf_reset_header(s);
1092 return 0;
1093 }
1094
1095 AVInputFormat asf_demuxer = {
1096 "asf",
1097 "asf format",
1098 sizeof(ASFContext),
1099 asf_probe,
1100 asf_read_header,
1101 asf_read_packet,
1102 asf_read_close,
1103 asf_read_seek,
1104 asf_read_pts,
1105 };
An experimental fork of FFmpeg project for DVCPRO-HD developers