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[libav.git] / libavformat / asf.c
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de6d9b64
FB		 1/*
2 * ASF compatible encoder and decoder.
19720f15 3 * Copyright (c) 2000, 2001 Fabrice Bellard.
de6d9b64 4 *
19720f15
FB		 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.
de6d9b64 9 *
19720f15 10 * This library is distributed in the hope that it will be useful,
de6d9b64 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
FB		 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
19720f15
FB		 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
de6d9b64 18 */
de6d9b64
FB		 19#include "avformat.h"
20#include "avi.h"
f80c1ac0 21#include "mpegaudio.h"
de6d9b64
FB		 22
23#define PACKET_SIZE 3200
24#define PACKET_HEADER_SIZE 12
25#define FRAME_HEADER_SIZE 17
26
27typedef struct {
28 int num;
29 int seq;
30 /* use for reading */
31 AVPacket pkt;
32 int frag_offset;
2a10020b 33 int timestamp;
4606ac8d 34 INT64 duration;
2a10020b
ZK		 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
de6d9b64
FB		 42} ASFStream;
43
44typedef struct {
2a10020b
ZK		 45 UINT32 v1;
46 UINT16 v2;
47 UINT16 v3;
48 UINT8 v4[8];
49} GUID;
50
51typedef struct __attribute__((packed)) {
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
79typedef struct {
de6d9b64
FB		 80 int seqno;
81 int packet_size;
8b3c13f9 82 int is_streamed;
2141dc37
ZK		 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 */
de6d9b64 85 /* non streamed additonnal info */
de6d9b64
FB		 86 INT64 nb_packets;
87 INT64 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 packet_buf[PACKET_SIZE];
94 ByteIOContext pb;
95 /* only for reading */
2a10020b
ZK		 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;
de6d9b64 108 int packet_padsize;
2a10020b
ZK		 109 int packet_frag_offset;
110 int packet_frag_size;
111 int packet_frag_timestamp;
2141dc37 112 int packet_multi_size;
2a10020b
ZK		 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 */
de6d9b64
FB		 119} ASFContext;
120
de6d9b64
FB		 121static const GUID asf_header = {
122 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
123};
124
125static const GUID file_header = {
126 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
127};
128
129static const GUID stream_header = {
130 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
131};
132
133static const GUID audio_stream = {
134 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
135};
136
137static const GUID audio_conceal_none = {
f80c1ac0
PG		 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 },
de6d9b64
FB		 141};
142
143static const GUID video_stream = {
144 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
145};
146
147static const GUID video_conceal_none = {
148 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
149};
150
151
152static const GUID comment_header = {
153 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
154};
155
156static const GUID codec_comment_header = {
157 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
158};
159static const GUID codec_comment1_header = {
160 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
161};
162
163static const GUID data_header = {
164 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
165};
166
167static const GUID index_guid = {
168 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
169};
170
171static const GUID head1_guid = {
172 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
173};
174
175static const GUID head2_guid = {
176 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
177};
2a10020b 178
de6d9b64
FB		 179/* I am not a number !!! This GUID is the one found on the PC used to
180 generate the stream */
181static const GUID my_guid = {
182 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
183};
184
185static void put_guid(ByteIOContext *s, const GUID *g)
186{
187 int i;
188
189 put_le32(s, g->v1);
190 put_le16(s, g->v2);
191 put_le16(s, g->v3);
192 for(i=0;i<8;i++)
193 put_byte(s, g->v4[i]);
194}
195
196static void put_str16(ByteIOContext *s, const char *tag)
197{
198 int c;
199
200 put_le16(s,strlen(tag) + 1);
201 for(;;) {
202 c = (UINT8)*tag++;
203 put_le16(s, c);
2a10020b 204 if (c == '\0')
de6d9b64
FB		 205 break;
206 }
207}
208
209static void put_str16_nolen(ByteIOContext *s, const char *tag)
210{
211 int c;
212
213 for(;;) {
214 c = (UINT8)*tag++;
215 put_le16(s, c);
2a10020b 216 if (c == '\0')
de6d9b64
FB		 217 break;
218 }
219}
220
221static INT64 put_header(ByteIOContext *pb, const GUID *g)
222{
223 INT64 pos;
224
225 pos = url_ftell(pb);
226 put_guid(pb, g);
227 put_le64(pb, 24);
228 return pos;
229}
230
231/* update header size */
232static void end_header(ByteIOContext *pb, INT64 pos)
233{
234 INT64 pos1;
235
236 pos1 = url_ftell(pb);
237 url_fseek(pb, pos + 16, SEEK_SET);
238 put_le64(pb, pos1 - pos);
239 url_fseek(pb, pos1, SEEK_SET);
240}
241
242/* write an asf chunk (only used in streaming case) */
f80c1ac0 243static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
de6d9b64
FB		 244{
245 ASFContext *asf = s->priv_data;
246 ByteIOContext *pb = &s->pb;
247 int length;
248
249 length = payload_length + 8;
2a10020b
ZK		 250 put_le16(pb, type);
251 put_le16(pb, length);
de6d9b64 252 put_le32(pb, asf->seqno);
f80c1ac0 253 put_le16(pb, flags); /* unknown bytes */
de6d9b64
FB		 254 put_le16(pb, length);
255 asf->seqno++;
256}
257
258/* convert from unix to windows time */
259static INT64 unix_to_file_time(int ti)
260{
261 INT64 t;
2a10020b 262
8be1c656
FB		 263 t = ti * INT64_C(10000000);
264 t += INT64_C(116444736000000000);
de6d9b64
FB		 265 return t;
266}
267
268/* write the header (used two times if non streamed) */
269static int asf_write_header1(AVFormatContext *s, INT64 file_size, INT64 data_chunk_size)
270{
271 ASFContext *asf = s->priv_data;
272 ByteIOContext *pb = &s->pb;
273 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
274 int has_title;
275 AVCodecContext *enc;
276 INT64 header_offset, cur_pos, hpos;
f80c1ac0 277 int bit_rate;
de6d9b64 278
084fada8 279 has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
de6d9b64 280
f80c1ac0
PG		 281 bit_rate = 0;
282 for(n=0;n<s->nb_streams;n++) {
283 enc = &s->streams[n]->codec;
284
285 bit_rate += enc->bit_rate;
286 }
287
8b3c13f9 288 if (asf->is_streamed) {
f80c1ac0 289 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
de6d9b64 290 }
f80c1ac0
PG		 291
292 put_guid(pb, &asf_header);
2a10020b 293 put_le64(pb, -1); /* header length, will be patched after */
f80c1ac0
PG		 294 put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
295 put_byte(pb, 1); /* ??? */
296 put_byte(pb, 2); /* ??? */
2a10020b 297
de6d9b64
FB		 298 /* file header */
299 header_offset = url_ftell(pb);
300 hpos = put_header(pb, &file_header);
301 put_guid(pb, &my_guid);
302 put_le64(pb, file_size);
303 file_time = 0;
304 put_le64(pb, unix_to_file_time(file_time));
305 put_le64(pb, asf->nb_packets); /* number of packets */
306 put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
307 put_le64(pb, asf->duration); /* duration (in 100ns units) */
2a10020b
ZK		 308 put_le32(pb, 0); /* start time stamp */
309 put_le32(pb, 0); /* ??? */
310 put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
de6d9b64
FB		 311 put_le32(pb, asf->packet_size); /* packet size */
312 put_le32(pb, asf->packet_size); /* packet size */
f80c1ac0 313 put_le32(pb, bit_rate); /* Nominal data rate in bps */
de6d9b64
FB		 314 end_header(pb, hpos);
315
316 /* unknown headers */
317 hpos = put_header(pb, &head1_guid);
318 put_guid(pb, &head2_guid);
319 put_le32(pb, 6);
320 put_le16(pb, 0);
321 end_header(pb, hpos);
322
323 /* title and other infos */
324 if (has_title) {
325 hpos = put_header(pb, &comment_header);
326 put_le16(pb, 2 * (strlen(s->title) + 1));
327 put_le16(pb, 2 * (strlen(s->author) + 1));
328 put_le16(pb, 2 * (strlen(s->copyright) + 1));
329 put_le16(pb, 2 * (strlen(s->comment) + 1));
330 put_le16(pb, 0);
331 put_str16_nolen(pb, s->title);
332 put_str16_nolen(pb, s->author);
333 put_str16_nolen(pb, s->copyright);
334 put_str16_nolen(pb, s->comment);
335 end_header(pb, hpos);
336 }
337
338 /* stream headers */
339 for(n=0;n<s->nb_streams;n++) {
f80c1ac0 340 INT64 es_pos;
17a241dd 341 // ASFStream *stream = &asf->streams[n];
f80c1ac0 342
de6d9b64
FB		 343 enc = &s->streams[n]->codec;
344 asf->streams[n].num = n + 1;
345 asf->streams[n].seq = 0;
2a10020b 346
de6d9b64
FB		 347 switch(enc->codec_type) {
348 case CODEC_TYPE_AUDIO:
349 wav_extra_size = 0;
350 extra_size = 18 + wav_extra_size;
351 extra_size2 = 0;
352 break;
353 default:
354 case CODEC_TYPE_VIDEO:
355 wav_extra_size = 0;
356 extra_size = 0x33;
357 extra_size2 = 0;
358 break;
359 }
360
361 hpos = put_header(pb, &stream_header);
362 if (enc->codec_type == CODEC_TYPE_AUDIO) {
363 put_guid(pb, &audio_stream);
364 put_guid(pb, &audio_conceal_none);
365 } else {
366 put_guid(pb, &video_stream);
367 put_guid(pb, &video_conceal_none);
368 }
369 put_le64(pb, 0); /* ??? */
f80c1ac0 370 es_pos = url_ftell(pb);
de6d9b64
FB		 371 put_le32(pb, extra_size); /* wav header len */
372 put_le32(pb, extra_size2); /* additional data len */
373 put_le16(pb, n + 1); /* stream number */
374 put_le32(pb, 0); /* ??? */
2a10020b 375
de6d9b64
FB		 376 if (enc->codec_type == CODEC_TYPE_AUDIO) {
377 /* WAVEFORMATEX header */
f80c1ac0
PG		 378 int wavsize = put_wav_header(pb, enc);
379
380 if (wavsize < 0)
46a3d068 381 return -1;
f80c1ac0
PG		 382 if (wavsize != extra_size) {
383 cur_pos = url_ftell(pb);
384 url_fseek(pb, es_pos, SEEK_SET);
385 put_le32(pb, wavsize); /* wav header len */
386 url_fseek(pb, cur_pos, SEEK_SET);
387 }
de6d9b64
FB		 388 } else {
389 put_le32(pb, enc->width);
390 put_le32(pb, enc->height);
391 put_byte(pb, 2); /* ??? */
392 put_le16(pb, 40); /* size */
393
394 /* BITMAPINFOHEADER header */
2727c35e 395 put_bmp_header(pb, enc, codec_bmp_tags, 1);
de6d9b64
FB		 396 }
397 end_header(pb, hpos);
398 }
399
400 /* media comments */
401
402 hpos = put_header(pb, &codec_comment_header);
403 put_guid(pb, &codec_comment1_header);
404 put_le32(pb, s->nb_streams);
405 for(n=0;n<s->nb_streams;n++) {
084fada8
PG		 406 AVCodec *p;
407
de6d9b64 408 enc = &s->streams[n]->codec;
084fada8 409 p = avcodec_find_encoder(enc->codec_id);
de6d9b64
FB		 410
411 put_le16(pb, asf->streams[n].num);
084fada8 412 put_str16(pb, p ? p->name : enc->codec_name);
de6d9b64
FB		 413 put_le16(pb, 0); /* no parameters */
414 /* id */
415 if (enc->codec_type == CODEC_TYPE_AUDIO) {
416 put_le16(pb, 2);
417 put_le16(pb, codec_get_tag(codec_wav_tags, enc->codec_id));
418 } else {
419 put_le16(pb, 4);
17a241dd 420 put_le32(pb, codec_get_tag(codec_bmp_tags, enc->codec_id));
de6d9b64
FB		 421 }
422 }
423 end_header(pb, hpos);
424
425 /* patch the header size fields */
426
427 cur_pos = url_ftell(pb);
428 header_size = cur_pos - header_offset;
8b3c13f9 429 if (asf->is_streamed) {
f80c1ac0
PG		 430 header_size += 8 + 30 + 50;
431
432 url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
de6d9b64 433 put_le16(pb, header_size);
f80c1ac0 434 url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
de6d9b64 435 put_le16(pb, header_size);
f80c1ac0
PG		 436
437 header_size -= 8 + 30 + 50;
de6d9b64 438 }
f80c1ac0
PG		 439 header_size += 24 + 6;
440 url_fseek(pb, header_offset - 14, SEEK_SET);
441 put_le64(pb, header_size);
de6d9b64
FB		 442 url_fseek(pb, cur_pos, SEEK_SET);
443
444 /* movie chunk, followed by packets of packet_size */
445 asf->data_offset = cur_pos;
446 put_guid(pb, &data_header);
447 put_le64(pb, data_chunk_size);
448 put_guid(pb, &my_guid);
449 put_le64(pb, asf->nb_packets); /* nb packets */
450 put_byte(pb, 1); /* ??? */
451 put_byte(pb, 1); /* ??? */
452 return 0;
453}
454
455static int asf_write_header(AVFormatContext *s)
456{
c9a65ca8 457 ASFContext *asf = s->priv_data;
de6d9b64 458
17a241dd
FB		 459 av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
460
de6d9b64
FB		 461 asf->packet_size = PACKET_SIZE;
462 asf->nb_packets = 0;
463
f80c1ac0 464 if (asf_write_header1(s, 0, 50) < 0) {
2824c473 465 //av_free(asf);
46a3d068
FB		 466 return -1;
467 }
de6d9b64
FB		 468
469 put_flush_packet(&s->pb);
470
471 asf->packet_nb_frames = 0;
472 asf->packet_timestamp_start = -1;
473 asf->packet_timestamp_end = -1;
474 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
475 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
476 NULL, NULL, NULL, NULL);
477
478 return 0;
479}
480
8b3c13f9
PG		 481static int asf_write_stream_header(AVFormatContext *s)
482{
483 ASFContext *asf = s->priv_data;
484
485 asf->is_streamed = 1;
486
487 return asf_write_header(s);
488}
489
de6d9b64 490/* write a fixed size packet */
2a10020b
ZK		 491static int put_packet(AVFormatContext *s,
492 unsigned int timestamp, unsigned int duration,
de6d9b64
FB		 493 int nb_frames, int padsize)
494{
495 ASFContext *asf = s->priv_data;
496 ByteIOContext *pb = &s->pb;
497 int flags;
498
8b3c13f9 499 if (asf->is_streamed) {
f80c1ac0 500 put_chunk(s, 0x4424, asf->packet_size, 0);
de6d9b64
FB		 501 }
502
503 put_byte(pb, 0x82);
504 put_le16(pb, 0);
2a10020b 505
de6d9b64
FB		 506 flags = 0x01; /* nb segments present */
507 if (padsize > 0) {
508 if (padsize < 256)
509 flags |= 0x08;
510 else
511 flags |= 0x10;
512 }
513 put_byte(pb, flags); /* flags */
514 put_byte(pb, 0x5d);
515 if (flags & 0x10)
f80c1ac0 516 put_le16(pb, padsize - 2);
de6d9b64 517 if (flags & 0x08)
f80c1ac0 518 put_byte(pb, padsize - 1);
de6d9b64
FB		 519 put_le32(pb, timestamp);
520 put_le16(pb, duration);
521 put_byte(pb, nb_frames | 0x80);
f80c1ac0
PG		 522
523 return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
de6d9b64
FB		 524}
525
526static void flush_packet(AVFormatContext *s)
527{
528 ASFContext *asf = s->priv_data;
529 int hdr_size, ptr;
2a10020b
ZK		 530
531 hdr_size = put_packet(s, asf->packet_timestamp_start,
532 asf->packet_timestamp_end - asf->packet_timestamp_start,
de6d9b64 533 asf->packet_nb_frames, asf->packet_size_left);
2a10020b 534
f80c1ac0
PG		 535 /* Clear out the padding bytes */
536 ptr = asf->packet_size - hdr_size - asf->packet_size_left;
de6d9b64 537 memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
2a10020b 538
de6d9b64 539 put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
2a10020b 540
de6d9b64
FB		 541 put_flush_packet(&s->pb);
542 asf->nb_packets++;
543 asf->packet_nb_frames = 0;
544 asf->packet_timestamp_start = -1;
545 asf->packet_timestamp_end = -1;
546 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
547 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
548 NULL, NULL, NULL, NULL);
549}
550
551static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
552 int payload_size, int frag_offset, int frag_len)
553{
554 ASFContext *asf = s->priv_data;
555 ByteIOContext *pb = &asf->pb;
556 int val;
557
558 val = stream->num;
492cd3a9 559 if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
de6d9b64
FB		 560 val |= 0x80;
561 put_byte(pb, val);
562 put_byte(pb, stream->seq);
563 put_le32(pb, frag_offset); /* fragment offset */
564 put_byte(pb, 0x08); /* flags */
565 put_le32(pb, payload_size);
566 put_le32(pb, timestamp);
567 put_le16(pb, frag_len);
568}
569
570
571/* Output a frame. We suppose that payload_size <= PACKET_SIZE.
572
573 It is there that you understand that the ASF format is really
2a10020b 574 crap. They have misread the MPEG Systems spec !
de6d9b64
FB		 575 */
576static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
577 UINT8 *buf, int payload_size)
578{
579 ASFContext *asf = s->priv_data;
580 int frag_pos, frag_len, frag_len1;
2a10020b 581
de6d9b64
FB		 582 frag_pos = 0;
583 while (frag_pos < payload_size) {
584 frag_len = payload_size - frag_pos;
585 frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
586 if (frag_len1 > 0) {
587 if (frag_len > frag_len1)
588 frag_len = frag_len1;
b13a517f 589 put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
de6d9b64
FB		 590 put_buffer(&asf->pb, buf, frag_len);
591 asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
592 asf->packet_timestamp_end = timestamp;
593 if (asf->packet_timestamp_start == -1)
594 asf->packet_timestamp_start = timestamp;
595 asf->packet_nb_frames++;
596 } else {
597 frag_len = 0;
598 }
599 frag_pos += frag_len;
600 buf += frag_len;
601 /* output the frame if filled */
602 if (asf->packet_size_left <= FRAME_HEADER_SIZE)
603 flush_packet(s);
604 }
605 stream->seq++;
606}
607
608
609static int asf_write_packet(AVFormatContext *s, int stream_index,
17a241dd 610 UINT8 *buf, int size, int timestamp)
de6d9b64
FB		 611{
612 ASFContext *asf = s->priv_data;
e0d2714a 613 ASFStream *stream;
de6d9b64
FB		 614 INT64 duration;
615 AVCodecContext *codec;
616
617 codec = &s->streams[stream_index]->codec;
e0d2714a 618 stream = &asf->streams[stream_index];
2a10020b 619
de6d9b64 620 if (codec->codec_type == CODEC_TYPE_AUDIO) {
2a10020b 621 duration = (codec->frame_number * codec->frame_size * INT64_C(10000000)) /
de6d9b64
FB		 622 codec->sample_rate;
623 } else {
2a10020b 624 duration = codec->frame_number *
8be1c656 625 ((INT64_C(10000000) * FRAME_RATE_BASE) / codec->frame_rate);
de6d9b64
FB		 626 }
627 if (duration > asf->duration)
628 asf->duration = duration;
2a10020b 629
e0d2714a 630 put_frame(s, stream, timestamp, buf, size);
de6d9b64
FB		 631 return 0;
632}
2a10020b 633
de6d9b64
FB		 634static int asf_write_trailer(AVFormatContext *s)
635{
636 ASFContext *asf = s->priv_data;
8be1c656 637 INT64 file_size;
de6d9b64
FB		 638
639 /* flush the current packet */
640 if (asf->pb.buf_ptr > asf->pb.buffer)
641 flush_packet(s);
642
8b3c13f9 643 if (asf->is_streamed) {
f80c1ac0 644 put_chunk(s, 0x4524, 0, 0); /* end of stream */
de6d9b64
FB		 645 } else {
646 /* rewrite an updated header */
647 file_size = url_ftell(&s->pb);
648 url_fseek(&s->pb, 0, SEEK_SET);
649 asf_write_header1(s, file_size, file_size - asf->data_offset);
650 }
651
652 put_flush_packet(&s->pb);
de6d9b64
FB		 653 return 0;
654}
655
656/**********************************/
657/* decoding */
658
659//#define DEBUG
660
661#ifdef DEBUG
662static void print_guid(const GUID *g)
663{
664 int i;
665 printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
2a10020b 666 for(i=0;i<8;i++)
de6d9b64
FB		 667 printf(" 0x%02x,", g->v4[i]);
668 printf("}\n");
669}
670#endif
671
672static void get_guid(ByteIOContext *s, GUID *g)
673{
674 int i;
675
676 g->v1 = get_le32(s);
677 g->v2 = get_le16(s);
678 g->v3 = get_le16(s);
679 for(i=0;i<8;i++)
680 g->v4[i] = get_byte(s);
681}
682
683#if 0
684static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
685{
686 int len, c;
687 char *q;
688
689 len = get_le16(pb);
690 q = buf;
691 while (len > 0) {
692 c = get_le16(pb);
693 if ((q - buf) < buf_size - 1)
694 *q++ = c;
695 len--;
696 }
697 *q = '\0';
698}
699#endif
700
701static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
702{
703 int c;
704 char *q;
705
706 q = buf;
707 while (len > 0) {
708 c = get_le16(pb);
709 if ((q - buf) < buf_size - 1)
710 *q++ = c;
711 len-=2;
712 }
713 *q = '\0';
714}
715
c9a65ca8
FB		 716static int asf_probe(AVProbeData *pd)
717{
718 GUID g;
719 const unsigned char *p;
720 int i;
721
722 /* check file header */
723 if (pd->buf_size <= 32)
724 return 0;
725 p = pd->buf;
726 g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
727 p += 4;
728 g.v2 = p[0] | (p[1] << 8);
729 p += 2;
730 g.v3 = p[0] | (p[1] << 8);
731 p += 2;
732 for(i=0;i<8;i++)
733 g.v4[i] = *p++;
734
735 if (!memcmp(&g, &asf_header, sizeof(GUID)))
736 return AVPROBE_SCORE_MAX;
737 else
738 return 0;
739}
740
de6d9b64
FB		 741static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
742{
c9a65ca8 743 ASFContext *asf = s->priv_data;
de6d9b64
FB		 744 GUID g;
745 ByteIOContext *pb = &s->pb;
746 AVStream *st;
747 ASFStream *asf_st;
e095026a 748 int size, i;
de6d9b64
FB		 749 INT64 gsize;
750
17a241dd
FB		 751 av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
752
de6d9b64
FB		 753 get_guid(pb, &g);
754 if (memcmp(&g, &asf_header, sizeof(GUID)))
755 goto fail;
756 get_le64(pb);
757 get_le32(pb);
758 get_byte(pb);
759 get_byte(pb);
2141dc37 760 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
de6d9b64
FB		 761 for(;;) {
762 get_guid(pb, &g);
763 gsize = get_le64(pb);
764#ifdef DEBUG
765 printf("%08Lx: ", url_ftell(pb) - 24);
766 print_guid(&g);
767 printf(" size=0x%Lx\n", gsize);
768#endif
769 if (gsize < 24)
770 goto fail;
771 if (!memcmp(&g, &file_header, sizeof(GUID))) {
2a10020b
ZK		 772 get_guid(pb, &asf->hdr.guid);
773 asf->hdr.file_size = get_le64(pb);
774 asf->hdr.create_time = get_le64(pb);
775 asf->hdr.packets_count = get_le64(pb);
776 asf->hdr.play_time = get_le64(pb);
777 asf->hdr.send_time = get_le64(pb);
778 asf->hdr.preroll = get_le32(pb);
779 asf->hdr.ignore = get_le32(pb);
780 asf->hdr.flags = get_le32(pb);
781 asf->hdr.min_pktsize = get_le32(pb);
782 asf->hdr.max_pktsize = get_le32(pb);
783 asf->hdr.max_bitrate = get_le32(pb);
2141dc37
ZK		 784 asf->packet_size = asf->hdr.max_pktsize;
785 asf->nb_packets = asf->hdr.packets_count;
de6d9b64 786 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
e095026a 787 int type, total_size;
de6d9b64
FB		 788 unsigned int tag1;
789 INT64 pos1, pos2;
2a10020b 790
de6d9b64
FB		 791 pos1 = url_ftell(pb);
792
793 st = av_mallocz(sizeof(AVStream));
794 if (!st)
795 goto fail;
1e491e29 796 avcodec_get_context_defaults(&st->codec);
2a10020b 797 s->streams[s->nb_streams] = st;
de6d9b64
FB		 798 asf_st = av_mallocz(sizeof(ASFStream));
799 if (!asf_st)
800 goto fail;
801 st->priv_data = asf_st;
1359c2d4 802 st->time_length = (asf->hdr.send_time - asf->hdr.preroll) / 10; // us
de6d9b64
FB		 803 get_guid(pb, &g);
804 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
805 type = CODEC_TYPE_AUDIO;
806 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
807 type = CODEC_TYPE_VIDEO;
808 } else {
809 goto fail;
810 }
811 get_guid(pb, &g);
812 total_size = get_le64(pb);
813 get_le32(pb);
814 get_le32(pb);
2a10020b
ZK		 815 st->id = get_le16(pb) & 0x7f; /* stream id */
816 // mapping of asf ID to AV stream ID;
817 asf->asfid2avid[st->id] = s->nb_streams++;
818
de6d9b64 819 get_le32(pb);
2141dc37 820 st->codec.codec_type = type;
41568e4a 821 st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
de6d9b64 822 if (type == CODEC_TYPE_AUDIO) {
e095026a 823 get_wav_header(pb, &st->codec, 1);
2a10020b
ZK		 824 /* We have to init the frame size at some point .... */
825 pos2 = url_ftell(pb);
2141dc37 826 if (gsize > (pos2 + 8 - pos1 + 24)) {
2a10020b
ZK		 827 asf_st->ds_span = get_byte(pb);
828 asf_st->ds_packet_size = get_le16(pb);
829 asf_st->ds_chunk_size = get_le16(pb);
830 asf_st->ds_data_size = get_le16(pb);
831 asf_st->ds_silence_data = get_byte(pb);
832 }
833 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
834 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
835 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
2141dc37 836 if (asf_st->ds_span > 1) {
2a10020b
ZK		 837 if (!asf_st->ds_chunk_size
838 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
839 asf_st->ds_span = 0; // disable descrambling
840 }
f80c1ac0
PG		 841 switch (st->codec.codec_id) {
842 case CODEC_ID_MP3LAME:
843 st->codec.frame_size = MPA_FRAME_SIZE;
844 break;
845 case CODEC_ID_PCM_S16LE:
846 case CODEC_ID_PCM_S16BE:
847 case CODEC_ID_PCM_U16LE:
848 case CODEC_ID_PCM_U16BE:
849 case CODEC_ID_PCM_S8:
850 case CODEC_ID_PCM_U8:
851 case CODEC_ID_PCM_ALAW:
852 case CODEC_ID_PCM_MULAW:
853 st->codec.frame_size = 1;
854 break;
855 default:
856 /* This is probably wrong, but it prevents a crash later */
857 st->codec.frame_size = 1;
858 break;
859 }
de6d9b64 860 } else {
2141dc37 861 get_le32(pb);
de6d9b64
FB		 862 get_le32(pb);
863 get_byte(pb);
864 size = get_le16(pb); /* size */
865 get_le32(pb); /* size */
866 st->codec.width = get_le32(pb);
2a10020b
ZK		 867 st->codec.height = get_le32(pb);
868 /* not available for asf */
de6d9b64
FB		 869 get_le16(pb); /* panes */
870 get_le16(pb); /* depth */
871 tag1 = get_le32(pb);
2141dc37
ZK		 872 url_fskip(pb, 20);
873 if (size > 40) {
e40fed0b
ZK		 874 st->codec.extradata_size = size - 40;
875 st->codec.extradata = av_mallocz(st->codec.extradata_size);
876 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
2141dc37 877 }
0570bf06 878 st->codec.codec_tag = st->codec.fourcc = tag1;
17a241dd 879 st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
de6d9b64
FB		 880 }
881 pos2 = url_ftell(pb);
882 url_fskip(pb, gsize - (pos2 - pos1 + 24));
883 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
884 break;
885 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
886 int len1, len2, len3, len4, len5;
887
888 len1 = get_le16(pb);
889 len2 = get_le16(pb);
890 len3 = get_le16(pb);
891 len4 = get_le16(pb);
892 len5 = get_le16(pb);
893 get_str16_nolen(pb, len1, s->title, sizeof(s->title));
894 get_str16_nolen(pb, len2, s->author, sizeof(s->author));
895 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
896 get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
2141dc37 897 url_fskip(pb, len5);
de6d9b64
FB		 898#if 0
899 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
900 int v1, v2;
901 get_guid(pb, &g);
902 v1 = get_le32(pb);
903 v2 = get_le16(pb);
904 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
905 int len, v1, n, num;
906 char str[256], *q;
907 char tag[16];
908
909 get_guid(pb, &g);
910 print_guid(&g);
2a10020b 911
de6d9b64
FB		 912 n = get_le32(pb);
913 for(i=0;i<n;i++) {
914 num = get_le16(pb); /* stream number */
915 get_str16(pb, str, sizeof(str));
916 get_str16(pb, str, sizeof(str));
917 len = get_le16(pb);
918 q = tag;
919 while (len > 0) {
920 v1 = get_byte(pb);
921 if ((q - tag) < sizeof(tag) - 1)
922 *q++ = v1;
923 len--;
924 }
925 *q = '\0';
926 }
927#endif
928 } else if (url_feof(pb)) {
929 goto fail;
930 } else {
931 url_fseek(pb, gsize - 24, SEEK_CUR);
932 }
933 }
934 get_guid(pb, &g);
935 get_le64(pb);
936 get_byte(pb);
937 get_byte(pb);
2141dc37
ZK		 938 if (url_feof(pb))
939 goto fail;
940 asf->data_offset = url_ftell(pb);
de6d9b64
FB		 941 asf->packet_size_left = 0;
942
943 return 0;
944
945 fail:
4c3dff6d 946 for(i=0;i<s->nb_streams;i++) {
de6d9b64 947 AVStream *st = s->streams[i];
4c3dff6d 948 if (st) {
2141dc37 949 av_free(st->priv_data);
4c3dff6d
ZK		 950 av_free(st->codec.extradata);
951 }
1ea4f593 952 av_free(st);
de6d9b64 953 }
de6d9b64
FB		 954 return -1;
955}
956
2a10020b
ZK		 957#define DO_2BITS(bits, var, defval) \
958 switch (bits & 3) \
959 { \
960 case 3: var = get_le32(pb); rsize += 4; break; \
961 case 2: var = get_le16(pb); rsize += 2; break; \
962 case 1: var = get_byte(pb); rsize++; break; \
963 default: var = defval; break; \
964 }
965
de6d9b64
FB		 966static int asf_get_packet(AVFormatContext *s)
967{
968 ASFContext *asf = s->priv_data;
969 ByteIOContext *pb = &s->pb;
2a10020b
ZK		 970 uint32_t packet_length, padsize;
971 int rsize = 11;
972 int c = get_byte(pb);
1359c2d4 973 if (c != 0x82) {
5acdd6e6
ZK		 974 if (!url_feof(pb))
975 printf("ff asf bad header %x at:%Ld\n", c, url_ftell(pb));
2a10020b
ZK		 976 return -EIO;
977 }
978 if ((c & 0x0f) == 2) { // always true for now
1359c2d4 979 if (get_le16(pb) != 0) {
5acdd6e6
ZK		 980 if (!url_feof(pb))
981 printf("ff asf bad non zero\n");
2a10020b
ZK		 982 return -EIO;
983 }
de6d9b64 984 }
2a10020b
ZK		 985
986 asf->packet_flags = get_byte(pb);
987 asf->packet_property = get_byte(pb);
988
989 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
990 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
991 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
992
993 asf->packet_timestamp = get_le32(pb);
de6d9b64 994 get_le16(pb); /* duration */
2141dc37 995 // rsize has at least 11 bytes which have to be present
2a10020b
ZK		 996
997 if (asf->packet_flags & 0x01) {
998 asf->packet_segsizetype = get_byte(pb); rsize++;
999 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1000 } else {
1001 asf->packet_segments = 1;
1002 asf->packet_segsizetype = 0x80;
1003 }
1004 asf->packet_size_left = packet_length - padsize - rsize;
acbe6cfa
ZK		 1005 if (packet_length < asf->hdr.min_pktsize)
1006 padsize += asf->hdr.min_pktsize - packet_length;
2a10020b 1007 asf->packet_padsize = padsize;
de6d9b64 1008#ifdef DEBUG
2a10020b 1009 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
de6d9b64 1010#endif
de6d9b64
FB		 1011 return 0;
1012}
1013
1014static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1015{
1016 ASFContext *asf = s->priv_data;
2a10020b 1017 ASFStream *asf_st = 0;
de6d9b64 1018 ByteIOContext *pb = &s->pb;
1359c2d4 1019 //static int pc = 0;
2a10020b
ZK		 1020 for (;;) {
1021 int rsize = 0;
2141dc37 1022 if (asf->packet_size_left < FRAME_HEADER_SIZE
1359c2d4 1023 || asf->packet_segments < 1) {
2a10020b 1024 //asf->packet_size_left <= asf->packet_padsize) {
1359c2d4
ZK		 1025 int ret = asf->packet_size_left + asf->packet_padsize;
1026 //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
1027 /* fail safe */
1028 url_fskip(pb, ret);
2a10020b
ZK		 1029 ret = asf_get_packet(s);
1030 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
5acdd6e6 1031 if (ret < 0 || url_feof(pb))
2a10020b 1032 return -EIO;
2141dc37 1033 asf->packet_time_start = 0;
2a10020b
ZK		 1034 continue;
1035 }
2141dc37 1036 if (asf->packet_time_start == 0) {
2a10020b 1037 /* read frame header */
1359c2d4
ZK		 1038 int num = get_byte(pb);
1039 asf->packet_segments--;
2a10020b
ZK		 1040 rsize++;
1041 asf->packet_key_frame = (num & 0x80) >> 7;
1042 asf->stream_index = asf->asfid2avid[num & 0x7f];
2a10020b
ZK		 1043 // sequence should be ignored!
1044 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1045 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1046 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1047
1048 if (asf->packet_replic_size > 1) {
1049 // it should be always at least 8 bytes - FIXME validate
1050 asf->packet_obj_size = get_le32(pb);
1051 asf->packet_frag_timestamp = get_le32(pb); // timestamp
acbe6cfa
ZK		 1052 if (asf->packet_replic_size > 8)
1053 url_fskip(pb, asf->packet_replic_size - 8);
2a10020b
ZK		 1054 rsize += asf->packet_replic_size; // FIXME - check validity
1055 } else {
acbe6cfa 1056 // multipacket - frag_offset is begining timestamp
2a10020b
ZK		 1057 asf->packet_time_start = asf->packet_frag_offset;
1058 asf->packet_frag_offset = 0;
1059 asf->packet_frag_timestamp = asf->packet_timestamp;
2141dc37 1060
2a10020b
ZK		 1061 if (asf->packet_replic_size == 1) {
1062 asf->packet_time_delta = get_byte(pb);
1063 rsize++;
1064 }
1065 }
2a10020b
ZK		 1066 if (asf->packet_flags & 0x01) {
1067 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
acbe6cfa 1068#undef DO_2BITS
2a10020b
ZK		 1069 //printf("Fragsize %d\n", asf->packet_frag_size);
1070 } else {
1071 asf->packet_frag_size = asf->packet_size_left - rsize;
1072 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
1073 }
1359c2d4 1074 if (asf->packet_replic_size == 1) {
2141dc37 1075 asf->packet_multi_size = asf->packet_frag_size;
1359c2d4 1076 if (asf->packet_multi_size > asf->packet_size_left) {
2141dc37
ZK		 1077 asf->packet_segments = 0;
1078 continue;
1079 }
1080 }
2a10020b
ZK		 1081 asf->packet_size_left -= rsize;
1082 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1359c2d4
ZK		 1083
1084 if (asf->stream_index < 0) {
1085 asf->packet_time_start = 0;
1086 /* unhandled packet (should not happen) */
1087 url_fskip(pb, asf->packet_frag_size);
1088 asf->packet_size_left -= asf->packet_frag_size;
1089 printf("ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
1090 continue;
1091 }
1092 asf->asf_st = s->streams[asf->stream_index]->priv_data;
2a10020b
ZK		 1093 }
1094 asf_st = asf->asf_st;
1095
1096 if ((asf->packet_frag_offset != asf_st->frag_offset
1097 || (asf->packet_frag_offset
1098 && asf->packet_seq != asf_st->seq)) // seq should be ignored
1099 ) {
1100 /* cannot continue current packet: free it */
1101 // FIXME better check if packet was already allocated
2141dc37 1102 printf("ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
2a10020b 1103 asf_st->pkt.size,
2141dc37 1104 asf->packet_obj_size,
2a10020b
ZK		 1105 asf->packet_frag_offset, asf_st->frag_offset,
1106 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
2141dc37 1107 if (asf_st->pkt.size)
2a10020b
ZK		 1108 av_free_packet(&asf_st->pkt);
1109 asf_st->frag_offset = 0;
1110 if (asf->packet_frag_offset != 0) {
2a10020b 1111 url_fskip(pb, asf->packet_frag_size);
2141dc37
ZK		 1112 printf("ff asf parser skiping %db\n", asf->packet_frag_size);
1113 asf->packet_size_left -= asf->packet_frag_size;
2a10020b
ZK		 1114 continue;
1115 }
1116 }
2141dc37
ZK		 1117 if (asf->packet_replic_size == 1) {
1118 // frag_offset is here used as the begining timestamp
2a10020b 1119 asf->packet_frag_timestamp = asf->packet_time_start;
2141dc37 1120 asf->packet_time_start += asf->packet_time_delta;
2a10020b 1121 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
2141dc37
ZK		 1122 asf->packet_size_left--;
1123 asf->packet_multi_size--;
1124 if (asf->packet_multi_size < asf->packet_obj_size)
1125 {
1126 asf->packet_time_start = 0;
1127 url_fskip(pb, asf->packet_multi_size);
1128 asf->packet_size_left -= asf->packet_multi_size;
1129 continue;
1130 }
1131 asf->packet_multi_size -= asf->packet_obj_size;
1132 //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);
2a10020b 1133 }
2a10020b
ZK		 1134 if (asf_st->frag_offset == 0) {
1135 /* new packet */
1136 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1137 asf_st->seq = asf->packet_seq;
1138 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1139 asf_st->pkt.stream_index = asf->stream_index;
1140 if (asf->packet_key_frame)
1141 asf_st->pkt.flags |= PKT_FLAG_KEY;
1142 }
1143
1144 /* read data */
1145 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1146 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1147 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
2141dc37
ZK		 1148 asf->packet_size_left -= asf->packet_frag_size;
1149 if (asf->packet_size_left < 0)
1150 continue;
2a10020b
ZK		 1151 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
1152 asf->packet_frag_size);
1153 asf_st->frag_offset += asf->packet_frag_size;
2a10020b
ZK		 1154 /* test if whole packet is read */
1155 if (asf_st->frag_offset == asf_st->pkt.size) {
1156 /* return packet */
1157 if (asf_st->ds_span > 1) {
2141dc37 1158 /* packet descrambling */
2a10020b
ZK		 1159 char* newdata = av_malloc(asf_st->pkt.size);
1160 if (newdata) {
1161 int offset = 0;
1162 while (offset < asf_st->pkt.size) {
1163 int off = offset / asf_st->ds_chunk_size;
1164 int row = off / asf_st->ds_span;
1165 int col = off % asf_st->ds_span;
1166 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1167 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1168 memcpy(newdata + offset,
1169 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1170 asf_st->ds_chunk_size);
1171 offset += asf_st->ds_chunk_size;
1172 }
1173 av_free(asf_st->pkt.data);
1174 asf_st->pkt.data = newdata;
1175 }
1176 }
2a10020b
ZK		 1177 asf_st->frag_offset = 0;
1178 memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
1179 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1180 asf_st->pkt.size = 0;
1181 asf_st->pkt.data = 0;
2a10020b
ZK		 1182 break; // packet completed
1183 }
de6d9b64 1184 }
de6d9b64
FB		 1185 return 0;
1186}
1187
1188static int asf_read_close(AVFormatContext *s)
1189{
de6d9b64
FB		 1190 int i;
1191
1192 for(i=0;i<s->nb_streams;i++) {
4c3dff6d
ZK		 1193 AVStream *st = s->streams[i];
1194 av_free(st->priv_data);
1195 av_free(st->codec.extradata);
de6d9b64 1196 }
de6d9b64
FB		 1197 return 0;
1198}
1199
2a10020b
ZK		 1200static int asf_read_seek(AVFormatContext *s, int64_t pts)
1201{
1202 printf("SEEK TO %Ld", pts);
1203 return -1;
1204}
1205
0570bf06 1206static AVInputFormat asf_iformat = {
c9a65ca8
FB		 1207 "asf",
1208 "asf format",
1209 sizeof(ASFContext),
1210 asf_probe,
1211 asf_read_header,
1212 asf_read_packet,
1213 asf_read_close,
2a10020b 1214 asf_read_seek,
c9a65ca8
FB		 1215};
1216
0570bf06 1217static AVOutputFormat asf_oformat = {
de6d9b64
FB		 1218 "asf",
1219 "asf format",
c6c11cb6 1220 "video/x-ms-asf",
a56c66a7 1221 "asf,wmv",
c9a65ca8 1222 sizeof(ASFContext),
4606ac8d
ZK		 1223#ifdef CONFIG_MP3LAME
1224 CODEC_ID_MP3LAME,
1225#else
de6d9b64 1226 CODEC_ID_MP2,
4606ac8d 1227#endif
d7425f59 1228 CODEC_ID_MSMPEG4V3,
de6d9b64
FB		 1229 asf_write_header,
1230 asf_write_packet,
1231 asf_write_trailer,
de6d9b64 1232};
c9a65ca8 1233
0570bf06 1234static AVOutputFormat asf_stream_oformat = {
8b3c13f9
PG		 1235 "asf_stream",
1236 "asf format",
c6c11cb6 1237 "video/x-ms-asf",
8b3c13f9
PG		 1238 "asf,wmv",
1239 sizeof(ASFContext),
1240#ifdef CONFIG_MP3LAME
1241 CODEC_ID_MP3LAME,
1242#else
1243 CODEC_ID_MP2,
1244#endif
d7425f59 1245 CODEC_ID_MSMPEG4V3,
8b3c13f9
PG		 1246 asf_write_stream_header,
1247 asf_write_packet,
1248 asf_write_trailer,
1249};
1250
c9a65ca8
FB		 1251int asf_init(void)
1252{
1253 av_register_input_format(&asf_iformat);
1254 av_register_output_format(&asf_oformat);
8b3c13f9 1255 av_register_output_format(&asf_stream_oformat);
c9a65ca8
FB		 1256 return 0;
1257}
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