b069b1d086676a07440a547f623f450f7d8d64e8
[libav.git] / libavformat / asf.c
1 /*
2 * ASF compatible encoder and decoder.
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 #include "avformat.h"
20 #include "avi.h"
21 #include "mpegaudio.h"
22
23 #define PACKET_SIZE 3200
24 #define PACKET_HEADER_SIZE 12
25 #define FRAME_HEADER_SIZE 17
26
27 typedef struct {
28 int num;
29 int seq;
30 /* use for reading */
31 AVPacket pkt;
32 int frag_offset;
33 int timestamp;
34 int64_t duration;
35
36 int ds_span; /* descrambling */
37 int ds_packet_size;
38 int ds_chunk_size;
39 int ds_data_size;
40 int ds_silence_data;
41
42 } ASFStream;
43
44 typedef struct {
45 uint32_t v1;
46 uint16_t v2;
47 uint16_t v3;
48 uint8_t v4[8];
49 } GUID;
50
51 typedef struct {
52 GUID guid; // generated by client computer
53 uint64_t file_size; // in bytes
54 // invalid if broadcasting
55 uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
56 // invalid if broadcasting
57 uint64_t packets_count; // how many packets are there in the file
58 // invalid if broadcasting
59 uint64_t play_time; // play time, in 100-nanosecond units
60 // invalid if broadcasting
61 uint64_t send_time; // time to send file, in 100-nanosecond units
62 // invalid if broadcasting (could be ignored)
63 uint32_t preroll; // timestamp of the first packet, in milliseconds
64 // if nonzero - substract from time
65 uint32_t ignore; // preroll is 64bit - but let's just ignore it
66 uint32_t flags; // 0x01 - broadcast
67 // 0x02 - seekable
68 // rest is reserved should be 0
69 uint32_t min_pktsize; // size of a data packet
70 // invalid if broadcasting
71 uint32_t max_pktsize; // shall be the same as for min_pktsize
72 // invalid if broadcasting
73 uint32_t max_bitrate; // bandwith of stream in bps
74 // should be the sum of bitrates of the
75 // individual media streams
76 } ASFMainHeader;
77
78
79 typedef struct {
80 int seqno;
81 int packet_size;
82 int is_streamed;
83 int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */
84 ASFStream streams[128]; /* it's max number and it's not that big */
85 /* non streamed additonnal info */
86 int64_t nb_packets;
87 int64_t duration; /* in 100ns units */
88 /* packet filling */
89 int packet_size_left;
90 int packet_timestamp_start;
91 int packet_timestamp_end;
92 int packet_nb_frames;
93 uint8_t packet_buf[PACKET_SIZE];
94 ByteIOContext pb;
95 /* only for reading */
96 uint64_t data_offset; /* begining of the first data packet */
97
98 ASFMainHeader hdr;
99
100 int packet_flags;
101 int packet_property;
102 int packet_timestamp;
103 int packet_segsizetype;
104 int packet_segments;
105 int packet_seq;
106 int packet_replic_size;
107 int packet_key_frame;
108 int packet_padsize;
109 int packet_frag_offset;
110 int packet_frag_size;
111 int packet_frag_timestamp;
112 int packet_multi_size;
113 int packet_obj_size;
114 int packet_time_delta;
115 int packet_time_start;
116
117 int stream_index;
118 ASFStream* asf_st; /* currently decoded stream */
119 } ASFContext;
120
121 static const GUID asf_header = {
122 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
123 };
124
125 static const GUID file_header = {
126 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
127 };
128
129 static const GUID stream_header = {
130 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
131 };
132
133 static const GUID audio_stream = {
134 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
135 };
136
137 static const GUID audio_conceal_none = {
138 // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
139 // New value lifted from avifile
140 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
141 };
142
143 static const GUID video_stream = {
144 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
145 };
146
147 static const GUID video_conceal_none = {
148 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
149 };
150
151
152 static const GUID comment_header = {
153 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
154 };
155
156 static const GUID codec_comment_header = {
157 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
158 };
159 static const GUID codec_comment1_header = {
160 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
161 };
162
163 static const GUID data_header = {
164 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
165 };
166
167 static const GUID index_guid = {
168 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
169 };
170
171 static const GUID head1_guid = {
172 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
173 };
174
175 static const GUID head2_guid = {
176 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
177 };
178
179 /* I am not a number !!! This GUID is the one found on the PC used to
180 generate the stream */
181 static const GUID my_guid = {
182 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
183 };
184
185 #ifdef CONFIG_ENCODERS
186 static void put_guid(ByteIOContext *s, const GUID *g)
187 {
188 int i;
189
190 put_le32(s, g->v1);
191 put_le16(s, g->v2);
192 put_le16(s, g->v3);
193 for(i=0;i<8;i++)
194 put_byte(s, g->v4[i]);
195 }
196
197 static void put_str16(ByteIOContext *s, const char *tag)
198 {
199 int c;
200
201 put_le16(s,strlen(tag) + 1);
202 for(;;) {
203 c = (uint8_t)*tag++;
204 put_le16(s, c);
205 if (c == '\0')
206 break;
207 }
208 }
209
210 static void put_str16_nolen(ByteIOContext *s, const char *tag)
211 {
212 int c;
213
214 for(;;) {
215 c = (uint8_t)*tag++;
216 put_le16(s, c);
217 if (c == '\0')
218 break;
219 }
220 }
221
222 static int64_t put_header(ByteIOContext *pb, const GUID *g)
223 {
224 int64_t pos;
225
226 pos = url_ftell(pb);
227 put_guid(pb, g);
228 put_le64(pb, 24);
229 return pos;
230 }
231
232 /* update header size */
233 static void end_header(ByteIOContext *pb, int64_t pos)
234 {
235 int64_t pos1;
236
237 pos1 = url_ftell(pb);
238 url_fseek(pb, pos + 16, SEEK_SET);
239 put_le64(pb, pos1 - pos);
240 url_fseek(pb, pos1, SEEK_SET);
241 }
242
243 /* write an asf chunk (only used in streaming case) */
244 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
245 {
246 ASFContext *asf = s->priv_data;
247 ByteIOContext *pb = &s->pb;
248 int length;
249
250 length = payload_length + 8;
251 put_le16(pb, type);
252 put_le16(pb, length);
253 put_le32(pb, asf->seqno);
254 put_le16(pb, flags); /* unknown bytes */
255 put_le16(pb, length);
256 asf->seqno++;
257 }
258
259 /* convert from unix to windows time */
260 static int64_t unix_to_file_time(int ti)
261 {
262 int64_t t;
263
264 t = ti * int64_t_C(10000000);
265 t += int64_t_C(116444736000000000);
266 return t;
267 }
268
269 /* write the header (used two times if non streamed) */
270 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
271 {
272 ASFContext *asf = s->priv_data;
273 ByteIOContext *pb = &s->pb;
274 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
275 int has_title;
276 AVCodecContext *enc;
277 int64_t header_offset, cur_pos, hpos;
278 int bit_rate;
279
280 has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
281
282 bit_rate = 0;
283 for(n=0;n<s->nb_streams;n++) {
284 enc = &s->streams[n]->codec;
285
286 bit_rate += enc->bit_rate;
287 }
288
289 if (asf->is_streamed) {
290 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
291 }
292
293 put_guid(pb, &asf_header);
294 put_le64(pb, -1); /* header length, will be patched after */
295 put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
296 put_byte(pb, 1); /* ??? */
297 put_byte(pb, 2); /* ??? */
298
299 /* file header */
300 header_offset = url_ftell(pb);
301 hpos = put_header(pb, &file_header);
302 put_guid(pb, &my_guid);
303 put_le64(pb, file_size);
304 file_time = 0;
305 put_le64(pb, unix_to_file_time(file_time));
306 put_le64(pb, asf->nb_packets); /* number of packets */
307 put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
308 put_le64(pb, asf->duration); /* duration (in 100ns units) */
309 put_le32(pb, 0); /* start time stamp */
310 put_le32(pb, 0); /* ??? */
311 put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
312 put_le32(pb, asf->packet_size); /* packet size */
313 put_le32(pb, asf->packet_size); /* packet size */
314 put_le32(pb, bit_rate); /* Nominal data rate in bps */
315 end_header(pb, hpos);
316
317 /* unknown headers */
318 hpos = put_header(pb, &head1_guid);
319 put_guid(pb, &head2_guid);
320 put_le32(pb, 6);
321 put_le16(pb, 0);
322 end_header(pb, hpos);
323
324 /* title and other infos */
325 if (has_title) {
326 hpos = put_header(pb, &comment_header);
327 put_le16(pb, 2 * (strlen(s->title) + 1));
328 put_le16(pb, 2 * (strlen(s->author) + 1));
329 put_le16(pb, 2 * (strlen(s->copyright) + 1));
330 put_le16(pb, 2 * (strlen(s->comment) + 1));
331 put_le16(pb, 0);
332 put_str16_nolen(pb, s->title);
333 put_str16_nolen(pb, s->author);
334 put_str16_nolen(pb, s->copyright);
335 put_str16_nolen(pb, s->comment);
336 end_header(pb, hpos);
337 }
338
339 /* stream headers */
340 for(n=0;n<s->nb_streams;n++) {
341 int64_t es_pos;
342 // ASFStream *stream = &asf->streams[n];
343
344 enc = &s->streams[n]->codec;
345 asf->streams[n].num = n + 1;
346 asf->streams[n].seq = 0;
347
348 switch(enc->codec_type) {
349 case CODEC_TYPE_AUDIO:
350 wav_extra_size = 0;
351 extra_size = 18 + wav_extra_size;
352 extra_size2 = 0;
353 break;
354 default:
355 case CODEC_TYPE_VIDEO:
356 wav_extra_size = 0;
357 extra_size = 0x33;
358 extra_size2 = 0;
359 break;
360 }
361
362 hpos = put_header(pb, &stream_header);
363 if (enc->codec_type == CODEC_TYPE_AUDIO) {
364 put_guid(pb, &audio_stream);
365 put_guid(pb, &audio_conceal_none);
366 } else {
367 put_guid(pb, &video_stream);
368 put_guid(pb, &video_conceal_none);
369 }
370 put_le64(pb, 0); /* ??? */
371 es_pos = url_ftell(pb);
372 put_le32(pb, extra_size); /* wav header len */
373 put_le32(pb, extra_size2); /* additional data len */
374 put_le16(pb, n + 1); /* stream number */
375 put_le32(pb, 0); /* ??? */
376
377 if (enc->codec_type == CODEC_TYPE_AUDIO) {
378 /* WAVEFORMATEX header */
379 int wavsize = put_wav_header(pb, enc);
380
381 if (wavsize < 0)
382 return -1;
383 if (wavsize != extra_size) {
384 cur_pos = url_ftell(pb);
385 url_fseek(pb, es_pos, SEEK_SET);
386 put_le32(pb, wavsize); /* wav header len */
387 url_fseek(pb, cur_pos, SEEK_SET);
388 }
389 } else {
390 put_le32(pb, enc->width);
391 put_le32(pb, enc->height);
392 put_byte(pb, 2); /* ??? */
393 put_le16(pb, 40); /* size */
394
395 /* BITMAPINFOHEADER header */
396 put_bmp_header(pb, enc, codec_bmp_tags, 1);
397 }
398 end_header(pb, hpos);
399 }
400
401 /* media comments */
402
403 hpos = put_header(pb, &codec_comment_header);
404 put_guid(pb, &codec_comment1_header);
405 put_le32(pb, s->nb_streams);
406 for(n=0;n<s->nb_streams;n++) {
407 AVCodec *p;
408
409 enc = &s->streams[n]->codec;
410 p = avcodec_find_encoder(enc->codec_id);
411
412 put_le16(pb, asf->streams[n].num);
413 put_str16(pb, p ? p->name : enc->codec_name);
414 put_le16(pb, 0); /* no parameters */
415
416
417 /* id */
418 if (enc->codec_type == CODEC_TYPE_AUDIO) {
419 put_le16(pb, 2);
420 if(!enc->codec_tag)
421 enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
422 if(!enc->codec_tag)
423 return -1;
424 put_le16(pb, enc->codec_tag);
425 } else {
426 put_le16(pb, 4);
427 if(!enc->codec_tag)
428 enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
429 if(!enc->codec_tag)
430 return -1;
431 put_le32(pb, enc->codec_tag);
432 }
433 }
434 end_header(pb, hpos);
435
436 /* patch the header size fields */
437
438 cur_pos = url_ftell(pb);
439 header_size = cur_pos - header_offset;
440 if (asf->is_streamed) {
441 header_size += 8 + 30 + 50;
442
443 url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
444 put_le16(pb, header_size);
445 url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
446 put_le16(pb, header_size);
447
448 header_size -= 8 + 30 + 50;
449 }
450 header_size += 24 + 6;
451 url_fseek(pb, header_offset - 14, SEEK_SET);
452 put_le64(pb, header_size);
453 url_fseek(pb, cur_pos, SEEK_SET);
454
455 /* movie chunk, followed by packets of packet_size */
456 asf->data_offset = cur_pos;
457 put_guid(pb, &data_header);
458 put_le64(pb, data_chunk_size);
459 put_guid(pb, &my_guid);
460 put_le64(pb, asf->nb_packets); /* nb packets */
461 put_byte(pb, 1); /* ??? */
462 put_byte(pb, 1); /* ??? */
463 return 0;
464 }
465
466 static int asf_write_header(AVFormatContext *s)
467 {
468 ASFContext *asf = s->priv_data;
469
470 av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
471
472 asf->packet_size = PACKET_SIZE;
473 asf->nb_packets = 0;
474
475 if (asf_write_header1(s, 0, 50) < 0) {
476 //av_free(asf);
477 return -1;
478 }
479
480 put_flush_packet(&s->pb);
481
482 asf->packet_nb_frames = 0;
483 asf->packet_timestamp_start = -1;
484 asf->packet_timestamp_end = -1;
485 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
486 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
487 NULL, NULL, NULL, NULL);
488
489 return 0;
490 }
491
492 static int asf_write_stream_header(AVFormatContext *s)
493 {
494 ASFContext *asf = s->priv_data;
495
496 asf->is_streamed = 1;
497
498 return asf_write_header(s);
499 }
500
501 /* write a fixed size packet */
502 static int put_packet(AVFormatContext *s,
503 unsigned int timestamp, unsigned int duration,
504 int nb_frames, int padsize)
505 {
506 ASFContext *asf = s->priv_data;
507 ByteIOContext *pb = &s->pb;
508 int flags;
509
510 if (asf->is_streamed) {
511 put_chunk(s, 0x4424, asf->packet_size, 0);
512 }
513
514 put_byte(pb, 0x82);
515 put_le16(pb, 0);
516
517 flags = 0x01; /* nb segments present */
518 if (padsize > 0) {
519 if (padsize < 256)
520 flags |= 0x08;
521 else
522 flags |= 0x10;
523 }
524 put_byte(pb, flags); /* flags */
525 put_byte(pb, 0x5d);
526 if (flags & 0x10)
527 put_le16(pb, padsize - 2);
528 if (flags & 0x08)
529 put_byte(pb, padsize - 1);
530 put_le32(pb, timestamp);
531 put_le16(pb, duration);
532 put_byte(pb, nb_frames | 0x80);
533
534 return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
535 }
536
537 static void flush_packet(AVFormatContext *s)
538 {
539 ASFContext *asf = s->priv_data;
540 int hdr_size, ptr;
541
542 hdr_size = put_packet(s, asf->packet_timestamp_start,
543 asf->packet_timestamp_end - asf->packet_timestamp_start,
544 asf->packet_nb_frames, asf->packet_size_left);
545
546 /* Clear out the padding bytes */
547 ptr = asf->packet_size - hdr_size - asf->packet_size_left;
548 memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
549
550 put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
551
552 put_flush_packet(&s->pb);
553 asf->nb_packets++;
554 asf->packet_nb_frames = 0;
555 asf->packet_timestamp_start = -1;
556 asf->packet_timestamp_end = -1;
557 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
558 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
559 NULL, NULL, NULL, NULL);
560 }
561
562 static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
563 int payload_size, int frag_offset, int frag_len)
564 {
565 ASFContext *asf = s->priv_data;
566 ByteIOContext *pb = &asf->pb;
567 int val;
568
569 val = stream->num;
570 if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
571 val |= 0x80;
572 put_byte(pb, val);
573 put_byte(pb, stream->seq);
574 put_le32(pb, frag_offset); /* fragment offset */
575 put_byte(pb, 0x08); /* flags */
576 put_le32(pb, payload_size);
577 put_le32(pb, timestamp);
578 put_le16(pb, frag_len);
579 }
580
581
582 /* Output a frame. We suppose that payload_size <= PACKET_SIZE.
583
584 It is there that you understand that the ASF format is really
585 crap. They have misread the MPEG Systems spec !
586 */
587 static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
588 const uint8_t *buf, int payload_size)
589 {
590 ASFContext *asf = s->priv_data;
591 int frag_pos, frag_len, frag_len1;
592
593 frag_pos = 0;
594 while (frag_pos < payload_size) {
595 frag_len = payload_size - frag_pos;
596 frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
597 if (frag_len1 > 0) {
598 if (frag_len > frag_len1)
599 frag_len = frag_len1;
600 put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
601 put_buffer(&asf->pb, buf, frag_len);
602 asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
603 asf->packet_timestamp_end = timestamp;
604 if (asf->packet_timestamp_start == -1)
605 asf->packet_timestamp_start = timestamp;
606 asf->packet_nb_frames++;
607 } else {
608 frag_len = 0;
609 }
610 frag_pos += frag_len;
611 buf += frag_len;
612 /* output the frame if filled */
613 if (asf->packet_size_left <= FRAME_HEADER_SIZE)
614 flush_packet(s);
615 }
616 stream->seq++;
617 }
618
619
620 static int asf_write_packet(AVFormatContext *s, int stream_index,
621 const uint8_t *buf, int size, int64_t timestamp)
622 {
623 ASFContext *asf = s->priv_data;
624 ASFStream *stream;
625 int64_t duration;
626 AVCodecContext *codec;
627
628 codec = &s->streams[stream_index]->codec;
629 stream = &asf->streams[stream_index];
630
631 if (codec->codec_type == CODEC_TYPE_AUDIO) {
632 duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
633 codec->sample_rate;
634 } else {
635 duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
636 }
637 if (duration > asf->duration)
638 asf->duration = duration;
639
640 put_frame(s, stream, timestamp, buf, size);
641 return 0;
642 }
643
644 static int asf_write_trailer(AVFormatContext *s)
645 {
646 ASFContext *asf = s->priv_data;
647 int64_t file_size;
648
649 /* flush the current packet */
650 if (asf->pb.buf_ptr > asf->pb.buffer)
651 flush_packet(s);
652
653 if (asf->is_streamed) {
654 put_chunk(s, 0x4524, 0, 0); /* end of stream */
655 } else {
656 /* rewrite an updated header */
657 file_size = url_ftell(&s->pb);
658 url_fseek(&s->pb, 0, SEEK_SET);
659 asf_write_header1(s, file_size, file_size - asf->data_offset);
660 }
661
662 put_flush_packet(&s->pb);
663 return 0;
664 }
665 #endif //CONFIG_ENCODERS
666
667 /**********************************/
668 /* decoding */
669
670 //#define DEBUG
671
672 #ifdef DEBUG
673 #define PRINT_IF_GUID(g,cmp) \
674 if (!memcmp(g, &cmp, sizeof(GUID))) \
675 printf("(GUID: %s) ", #cmp)
676
677 static void print_guid(const GUID *g)
678 {
679 int i;
680 PRINT_IF_GUID(g, asf_header);
681 else PRINT_IF_GUID(g, file_header);
682 else PRINT_IF_GUID(g, stream_header);
683 else PRINT_IF_GUID(g, audio_stream);
684 else PRINT_IF_GUID(g, audio_conceal_none);
685 else PRINT_IF_GUID(g, video_stream);
686 else PRINT_IF_GUID(g, video_conceal_none);
687 else PRINT_IF_GUID(g, comment_header);
688 else PRINT_IF_GUID(g, codec_comment_header);
689 else PRINT_IF_GUID(g, codec_comment1_header);
690 else PRINT_IF_GUID(g, data_header);
691 else PRINT_IF_GUID(g, index_guid);
692 else PRINT_IF_GUID(g, head1_guid);
693 else PRINT_IF_GUID(g, head2_guid);
694 else PRINT_IF_GUID(g, my_guid);
695 else
696 printf("(GUID: unknown) ");
697 printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
698 for(i=0;i<8;i++)
699 printf(" 0x%02x,", g->v4[i]);
700 printf("}\n");
701 }
702 #undef PRINT_IF_GUID(g,cmp)
703 #endif
704
705 static void get_guid(ByteIOContext *s, GUID *g)
706 {
707 int i;
708
709 g->v1 = get_le32(s);
710 g->v2 = get_le16(s);
711 g->v3 = get_le16(s);
712 for(i=0;i<8;i++)
713 g->v4[i] = get_byte(s);
714 }
715
716 #if 0
717 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
718 {
719 int len, c;
720 char *q;
721
722 len = get_le16(pb);
723 q = buf;
724 while (len > 0) {
725 c = get_le16(pb);
726 if ((q - buf) < buf_size - 1)
727 *q++ = c;
728 len--;
729 }
730 *q = '\0';
731 }
732 #endif
733
734 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
735 {
736 int c;
737 char *q;
738
739 q = buf;
740 while (len > 0) {
741 c = get_le16(pb);
742 if ((q - buf) < buf_size - 1)
743 *q++ = c;
744 len-=2;
745 }
746 *q = '\0';
747 }
748
749 static int asf_probe(AVProbeData *pd)
750 {
751 GUID g;
752 const unsigned char *p;
753 int i;
754
755 /* check file header */
756 if (pd->buf_size <= 32)
757 return 0;
758 p = pd->buf;
759 g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
760 p += 4;
761 g.v2 = p[0] | (p[1] << 8);
762 p += 2;
763 g.v3 = p[0] | (p[1] << 8);
764 p += 2;
765 for(i=0;i<8;i++)
766 g.v4[i] = *p++;
767
768 if (!memcmp(&g, &asf_header, sizeof(GUID)))
769 return AVPROBE_SCORE_MAX;
770 else
771 return 0;
772 }
773
774 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
775 {
776 ASFContext *asf = s->priv_data;
777 GUID g;
778 ByteIOContext *pb = &s->pb;
779 AVStream *st;
780 ASFStream *asf_st;
781 int size, i;
782 int64_t gsize;
783
784 av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
785
786 get_guid(pb, &g);
787 if (memcmp(&g, &asf_header, sizeof(GUID)))
788 goto fail;
789 get_le64(pb);
790 get_le32(pb);
791 get_byte(pb);
792 get_byte(pb);
793 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
794 for(;;) {
795 get_guid(pb, &g);
796 gsize = get_le64(pb);
797 #ifdef DEBUG
798 printf("%08Lx: ", url_ftell(pb) - 24);
799 print_guid(&g);
800 printf(" size=0x%Lx\n", gsize);
801 #endif
802 if (gsize < 24)
803 goto fail;
804 if (!memcmp(&g, &file_header, sizeof(GUID))) {
805 get_guid(pb, &asf->hdr.guid);
806 asf->hdr.file_size = get_le64(pb);
807 asf->hdr.create_time = get_le64(pb);
808 asf->hdr.packets_count = get_le64(pb);
809 asf->hdr.play_time = get_le64(pb);
810 asf->hdr.send_time = get_le64(pb);
811 asf->hdr.preroll = get_le32(pb);
812 asf->hdr.ignore = get_le32(pb);
813 asf->hdr.flags = get_le32(pb);
814 asf->hdr.min_pktsize = get_le32(pb);
815 asf->hdr.max_pktsize = get_le32(pb);
816 asf->hdr.max_bitrate = get_le32(pb);
817 asf->packet_size = asf->hdr.max_pktsize;
818 asf->nb_packets = asf->hdr.packets_count;
819 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
820 int type, total_size, type_specific_size;
821 unsigned int tag1;
822 int64_t pos1, pos2;
823
824 pos1 = url_ftell(pb);
825
826 st = av_new_stream(s, 0);
827 if (!st)
828 goto fail;
829 asf_st = av_mallocz(sizeof(ASFStream));
830 if (!asf_st)
831 goto fail;
832 st->priv_data = asf_st;
833 st->start_time = asf->hdr.preroll / (10000000 / AV_TIME_BASE);
834 st->duration = (asf->hdr.send_time - asf->hdr.preroll) /
835 (10000000 / AV_TIME_BASE);
836 get_guid(pb, &g);
837 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
838 type = CODEC_TYPE_AUDIO;
839 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
840 type = CODEC_TYPE_VIDEO;
841 } else {
842 goto fail;
843 }
844 get_guid(pb, &g);
845 total_size = get_le64(pb);
846 type_specific_size = get_le32(pb);
847 get_le32(pb);
848 st->id = get_le16(pb) & 0x7f; /* stream id */
849 // mapping of asf ID to AV stream ID;
850 asf->asfid2avid[st->id] = s->nb_streams - 1;
851
852 get_le32(pb);
853 st->codec.codec_type = type;
854 st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
855 if (type == CODEC_TYPE_AUDIO) {
856 get_wav_header(pb, &st->codec, type_specific_size);
857 /* We have to init the frame size at some point .... */
858 pos2 = url_ftell(pb);
859 if (gsize > (pos2 + 8 - pos1 + 24)) {
860 asf_st->ds_span = get_byte(pb);
861 asf_st->ds_packet_size = get_le16(pb);
862 asf_st->ds_chunk_size = get_le16(pb);
863 asf_st->ds_data_size = get_le16(pb);
864 asf_st->ds_silence_data = get_byte(pb);
865 }
866 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
867 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
868 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
869 if (asf_st->ds_span > 1) {
870 if (!asf_st->ds_chunk_size
871 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
872 asf_st->ds_span = 0; // disable descrambling
873 }
874 switch (st->codec.codec_id) {
875 case CODEC_ID_MP3:
876 st->codec.frame_size = MPA_FRAME_SIZE;
877 break;
878 case CODEC_ID_PCM_S16LE:
879 case CODEC_ID_PCM_S16BE:
880 case CODEC_ID_PCM_U16LE:
881 case CODEC_ID_PCM_U16BE:
882 case CODEC_ID_PCM_S8:
883 case CODEC_ID_PCM_U8:
884 case CODEC_ID_PCM_ALAW:
885 case CODEC_ID_PCM_MULAW:
886 st->codec.frame_size = 1;
887 break;
888 default:
889 /* This is probably wrong, but it prevents a crash later */
890 st->codec.frame_size = 1;
891 break;
892 }
893 } else {
894 get_le32(pb);
895 get_le32(pb);
896 get_byte(pb);
897 size = get_le16(pb); /* size */
898 get_le32(pb); /* size */
899 st->codec.width = get_le32(pb);
900 st->codec.height = get_le32(pb);
901 /* not available for asf */
902 get_le16(pb); /* panes */
903 st->codec.bits_per_sample = get_le16(pb); /* depth */
904 tag1 = get_le32(pb);
905 url_fskip(pb, 20);
906 if (size > 40) {
907 st->codec.extradata_size = size - 40;
908 st->codec.extradata = av_mallocz(st->codec.extradata_size);
909 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
910 }
911
912 /* Extract palette from extradata if bpp <= 8 */
913 /* This code assumes that extradata contains only palette */
914 /* This is true for all paletted codecs implemented in ffmpeg */
915 if (st->codec.extradata_size && (st->codec.bits_per_sample <= 8)) {
916 st->codec.palctrl = av_mallocz(sizeof(AVPaletteControl));
917 #ifdef WORDS_BIGENDIAN
918 for (i = 0; i < FFMIN(st->codec.extradata_size / 4, 256); i++)
919 st->codec.palctrl->palette[i] = bswap_32(st->codec.extradata)[i * 4]);
920 #else
921 memcpy(st->codec.palctrl->palette, st->codec.extradata,
922 FFMIN(st->codec.extradata_size, AVPALETTE_SIZE));
923 #endif
924 st->codec.palctrl->palette_changed = 1;
925 }
926
927 st->codec.codec_tag = tag1;
928 st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
929 }
930 pos2 = url_ftell(pb);
931 url_fskip(pb, gsize - (pos2 - pos1 + 24));
932 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
933 break;
934 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
935 int len1, len2, len3, len4, len5;
936
937 len1 = get_le16(pb);
938 len2 = get_le16(pb);
939 len3 = get_le16(pb);
940 len4 = get_le16(pb);
941 len5 = get_le16(pb);
942 get_str16_nolen(pb, len1, s->title, sizeof(s->title));
943 get_str16_nolen(pb, len2, s->author, sizeof(s->author));
944 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
945 get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
946 url_fskip(pb, len5);
947 #if 0
948 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
949 int v1, v2;
950 get_guid(pb, &g);
951 v1 = get_le32(pb);
952 v2 = get_le16(pb);
953 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
954 int len, v1, n, num;
955 char str[256], *q;
956 char tag[16];
957
958 get_guid(pb, &g);
959 print_guid(&g);
960
961 n = get_le32(pb);
962 for(i=0;i<n;i++) {
963 num = get_le16(pb); /* stream number */
964 get_str16(pb, str, sizeof(str));
965 get_str16(pb, str, sizeof(str));
966 len = get_le16(pb);
967 q = tag;
968 while (len > 0) {
969 v1 = get_byte(pb);
970 if ((q - tag) < sizeof(tag) - 1)
971 *q++ = v1;
972 len--;
973 }
974 *q = '\0';
975 }
976 #endif
977 } else if (url_feof(pb)) {
978 goto fail;
979 } else {
980 url_fseek(pb, gsize - 24, SEEK_CUR);
981 }
982 }
983 get_guid(pb, &g);
984 get_le64(pb);
985 get_byte(pb);
986 get_byte(pb);
987 if (url_feof(pb))
988 goto fail;
989 asf->data_offset = url_ftell(pb);
990 asf->packet_size_left = 0;
991
992 return 0;
993
994 fail:
995 for(i=0;i<s->nb_streams;i++) {
996 AVStream *st = s->streams[i];
997 if (st) {
998 av_free(st->priv_data);
999 av_free(st->codec.extradata);
1000 }
1001 av_free(st);
1002 }
1003 return -1;
1004 }
1005
1006 #define DO_2BITS(bits, var, defval) \
1007 switch (bits & 3) \
1008 { \
1009 case 3: var = get_le32(pb); rsize += 4; break; \
1010 case 2: var = get_le16(pb); rsize += 2; break; \
1011 case 1: var = get_byte(pb); rsize++; break; \
1012 default: var = defval; break; \
1013 }
1014
1015 static int asf_get_packet(AVFormatContext *s)
1016 {
1017 ASFContext *asf = s->priv_data;
1018 ByteIOContext *pb = &s->pb;
1019 uint32_t packet_length, padsize;
1020 int rsize = 11;
1021 int c = get_byte(pb);
1022 if (c != 0x82) {
1023 if (!url_feof(pb))
1024 printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
1025 return -EIO;
1026 }
1027 if ((c & 0x0f) == 2) { // always true for now
1028 if (get_le16(pb) != 0) {
1029 if (!url_feof(pb))
1030 printf("ff asf bad non zero\n");
1031 return -EIO;
1032 }
1033 }
1034
1035 asf->packet_flags = get_byte(pb);
1036 asf->packet_property = get_byte(pb);
1037
1038 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
1039 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1040 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1041
1042 asf->packet_timestamp = get_le32(pb);
1043 get_le16(pb); /* duration */
1044 // rsize has at least 11 bytes which have to be present
1045
1046 if (asf->packet_flags & 0x01) {
1047 asf->packet_segsizetype = get_byte(pb); rsize++;
1048 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1049 } else {
1050 asf->packet_segments = 1;
1051 asf->packet_segsizetype = 0x80;
1052 }
1053 asf->packet_size_left = packet_length - padsize - rsize;
1054 if (packet_length < asf->hdr.min_pktsize)
1055 padsize += asf->hdr.min_pktsize - packet_length;
1056 asf->packet_padsize = padsize;
1057 #ifdef DEBUG
1058 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
1059 #endif
1060 return 0;
1061 }
1062
1063 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1064 {
1065 ASFContext *asf = s->priv_data;
1066 ASFStream *asf_st = 0;
1067 ByteIOContext *pb = &s->pb;
1068 //static int pc = 0;
1069 for (;;) {
1070 int rsize = 0;
1071 if (asf->packet_size_left < FRAME_HEADER_SIZE
1072 || asf->packet_segments < 1) {
1073 //asf->packet_size_left <= asf->packet_padsize) {
1074 int ret = asf->packet_size_left + asf->packet_padsize;
1075 //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
1076 /* fail safe */
1077 url_fskip(pb, ret);
1078 ret = asf_get_packet(s);
1079 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
1080 if (ret < 0 || url_feof(pb))
1081 return -EIO;
1082 asf->packet_time_start = 0;
1083 continue;
1084 }
1085 if (asf->packet_time_start == 0) {
1086 /* read frame header */
1087 int num = get_byte(pb);
1088 asf->packet_segments--;
1089 rsize++;
1090 asf->packet_key_frame = (num & 0x80) >> 7;
1091 asf->stream_index = asf->asfid2avid[num & 0x7f];
1092 // sequence should be ignored!
1093 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1094 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1095 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1096
1097 if (asf->packet_replic_size > 1) {
1098 // it should be always at least 8 bytes - FIXME validate
1099 asf->packet_obj_size = get_le32(pb);
1100 asf->packet_frag_timestamp = get_le32(pb); // timestamp
1101 if (asf->packet_replic_size > 8)
1102 url_fskip(pb, asf->packet_replic_size - 8);
1103 rsize += asf->packet_replic_size; // FIXME - check validity
1104 } else {
1105 // multipacket - frag_offset is begining timestamp
1106 asf->packet_time_start = asf->packet_frag_offset;
1107 asf->packet_frag_offset = 0;
1108 asf->packet_frag_timestamp = asf->packet_timestamp;
1109
1110 if (asf->packet_replic_size == 1) {
1111 asf->packet_time_delta = get_byte(pb);
1112 rsize++;
1113 }
1114 }
1115 if (asf->packet_flags & 0x01) {
1116 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1117 #undef DO_2BITS
1118 //printf("Fragsize %d\n", asf->packet_frag_size);
1119 } else {
1120 asf->packet_frag_size = asf->packet_size_left - rsize;
1121 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
1122 }
1123 if (asf->packet_replic_size == 1) {
1124 asf->packet_multi_size = asf->packet_frag_size;
1125 if (asf->packet_multi_size > asf->packet_size_left) {
1126 asf->packet_segments = 0;
1127 continue;
1128 }
1129 }
1130 asf->packet_size_left -= rsize;
1131 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1132
1133 if (asf->stream_index < 0) {
1134 asf->packet_time_start = 0;
1135 /* unhandled packet (should not happen) */
1136 url_fskip(pb, asf->packet_frag_size);
1137 asf->packet_size_left -= asf->packet_frag_size;
1138 printf("ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
1139 continue;
1140 }
1141 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1142 }
1143 asf_st = asf->asf_st;
1144
1145 if ((asf->packet_frag_offset != asf_st->frag_offset
1146 || (asf->packet_frag_offset
1147 && asf->packet_seq != asf_st->seq)) // seq should be ignored
1148 ) {
1149 /* cannot continue current packet: free it */
1150 // FIXME better check if packet was already allocated
1151 printf("ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
1152 asf_st->pkt.size,
1153 asf->packet_obj_size,
1154 asf->packet_frag_offset, asf_st->frag_offset,
1155 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
1156 if (asf_st->pkt.size)
1157 av_free_packet(&asf_st->pkt);
1158 asf_st->frag_offset = 0;
1159 if (asf->packet_frag_offset != 0) {
1160 url_fskip(pb, asf->packet_frag_size);
1161 printf("ff asf parser skiping %db\n", asf->packet_frag_size);
1162 asf->packet_size_left -= asf->packet_frag_size;
1163 continue;
1164 }
1165 }
1166 if (asf->packet_replic_size == 1) {
1167 // frag_offset is here used as the begining timestamp
1168 asf->packet_frag_timestamp = asf->packet_time_start;
1169 asf->packet_time_start += asf->packet_time_delta;
1170 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
1171 asf->packet_size_left--;
1172 asf->packet_multi_size--;
1173 if (asf->packet_multi_size < asf->packet_obj_size)
1174 {
1175 asf->packet_time_start = 0;
1176 url_fskip(pb, asf->packet_multi_size);
1177 asf->packet_size_left -= asf->packet_multi_size;
1178 continue;
1179 }
1180 asf->packet_multi_size -= asf->packet_obj_size;
1181 //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);
1182 }
1183 if (asf_st->frag_offset == 0) {
1184 /* new packet */
1185 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1186 asf_st->seq = asf->packet_seq;
1187 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1188 asf_st->pkt.stream_index = asf->stream_index;
1189 if (asf->packet_key_frame)
1190 asf_st->pkt.flags |= PKT_FLAG_KEY;
1191 }
1192
1193 /* read data */
1194 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1195 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1196 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1197 asf->packet_size_left -= asf->packet_frag_size;
1198 if (asf->packet_size_left < 0)
1199 continue;
1200 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
1201 asf->packet_frag_size);
1202 asf_st->frag_offset += asf->packet_frag_size;
1203 /* test if whole packet is read */
1204 if (asf_st->frag_offset == asf_st->pkt.size) {
1205 /* return packet */
1206 if (asf_st->ds_span > 1) {
1207 /* packet descrambling */
1208 char* newdata = av_malloc(asf_st->pkt.size);
1209 if (newdata) {
1210 int offset = 0;
1211 while (offset < asf_st->pkt.size) {
1212 int off = offset / asf_st->ds_chunk_size;
1213 int row = off / asf_st->ds_span;
1214 int col = off % asf_st->ds_span;
1215 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1216 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1217 memcpy(newdata + offset,
1218 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1219 asf_st->ds_chunk_size);
1220 offset += asf_st->ds_chunk_size;
1221 }
1222 av_free(asf_st->pkt.data);
1223 asf_st->pkt.data = newdata;
1224 }
1225 }
1226 asf_st->frag_offset = 0;
1227 memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
1228 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1229 asf_st->pkt.size = 0;
1230 asf_st->pkt.data = 0;
1231 break; // packet completed
1232 }
1233 }
1234 return 0;
1235 }
1236
1237 static int asf_read_close(AVFormatContext *s)
1238 {
1239 int i;
1240
1241 for(i=0;i<s->nb_streams;i++) {
1242 AVStream *st = s->streams[i];
1243 av_free(st->priv_data);
1244 av_free(st->codec.extradata);
1245 av_free(st->codec.palctrl);
1246 }
1247 return 0;
1248 }
1249
1250 static int asf_read_seek(AVFormatContext *s, int64_t pts)
1251 {
1252 printf("SEEK TO %lld", pts);
1253 return -1;
1254 }
1255
1256 static AVInputFormat asf_iformat = {
1257 "asf",
1258 "asf format",
1259 sizeof(ASFContext),
1260 asf_probe,
1261 asf_read_header,
1262 asf_read_packet,
1263 asf_read_close,
1264 asf_read_seek,
1265 };
1266
1267 #ifdef CONFIG_ENCODERS
1268 static AVOutputFormat asf_oformat = {
1269 "asf",
1270 "asf format",
1271 "video/x-ms-asf",
1272 "asf,wmv",
1273 sizeof(ASFContext),
1274 #ifdef CONFIG_MP3LAME
1275 CODEC_ID_MP3,
1276 #else
1277 CODEC_ID_MP2,
1278 #endif
1279 CODEC_ID_MSMPEG4V3,
1280 asf_write_header,
1281 asf_write_packet,
1282 asf_write_trailer,
1283 };
1284
1285 static AVOutputFormat asf_stream_oformat = {
1286 "asf_stream",
1287 "asf format",
1288 "video/x-ms-asf",
1289 "asf,wmv",
1290 sizeof(ASFContext),
1291 #ifdef CONFIG_MP3LAME
1292 CODEC_ID_MP3,
1293 #else
1294 CODEC_ID_MP2,
1295 #endif
1296 CODEC_ID_MSMPEG4V3,
1297 asf_write_stream_header,
1298 asf_write_packet,
1299 asf_write_trailer,
1300 };
1301 #endif //CONFIG_ENCODERS
1302
1303 int asf_init(void)
1304 {
1305 av_register_input_format(&asf_iformat);
1306 #ifdef CONFIG_ENCODERS
1307 av_register_output_format(&asf_oformat);
1308 av_register_output_format(&asf_stream_oformat);
1309 #endif //CONFIG_ENCODERS
1310 return 0;
1311 }