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ffmpeg / libavformat / asf.c @ 4cfbf61b

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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
 *
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 * 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
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 * 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 __attribute__((packed)) {
52
    GUID guid;                        // generated by client computer
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    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
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    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
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    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
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    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
static 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

    
196
static 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_t)*tag++;
203
        put_le16(s, c);
204
        if (c == '\0')
205
            break;
206
    }
207
}
208

    
209
static void put_str16_nolen(ByteIOContext *s, const char *tag)
210
{
211
    int c;
212

    
213
    for(;;) {
214
        c = (uint8_t)*tag++;
215
        put_le16(s, c);
216
        if (c == '\0')
217
            break;
218
    }
219
}
220

    
221
static int64_t put_header(ByteIOContext *pb, const GUID *g)
222
{
223
    int64_t 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 */
232
static void end_header(ByteIOContext *pb, int64_t pos)
233
{
234
    int64_t 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) */
243
static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
244
{
245
    ASFContext *asf = s->priv_data;
246
    ByteIOContext *pb = &s->pb;
247
    int length;
248

    
249
    length = payload_length + 8;
250
    put_le16(pb, type);
251
    put_le16(pb, length);
252
    put_le32(pb, asf->seqno);
253
    put_le16(pb, flags); /* unknown bytes */
254
    put_le16(pb, length);
255
    asf->seqno++;
256
}
257

    
258
/* convert from unix to windows time */
259
static int64_t unix_to_file_time(int ti)
260
{
261
    int64_t t;
262

    
263
    t = ti * int64_t_C(10000000);
264
    t += int64_t_C(116444736000000000);
265
    return t;
266
}
267

    
268
/* write the header (used two times if non streamed) */
269
static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t 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_t header_offset, cur_pos, hpos;
277
    int bit_rate;
278

    
279
    has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
280

    
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

    
288
    if (asf->is_streamed) {
289
        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
290
    }
291

    
292
    put_guid(pb, &asf_header);
293
    put_le64(pb, -1); /* header length, will be patched after */
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); /* ??? */
297

    
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) */
308
    put_le32(pb, 0); /* start time stamp */
309
    put_le32(pb, 0); /* ??? */
310
    put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
311
    put_le32(pb, asf->packet_size); /* packet size */
312
    put_le32(pb, asf->packet_size); /* packet size */
313
    put_le32(pb, bit_rate); /* Nominal data rate in bps */
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++) {
340
        int64_t es_pos;
341
        //        ASFStream *stream = &asf->streams[n];
342

    
343
        enc = &s->streams[n]->codec;
344
        asf->streams[n].num = n + 1;
345
        asf->streams[n].seq = 0;
346

    
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); /* ??? */
370
        es_pos = url_ftell(pb);
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); /* ??? */
375

    
376
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
377
            /* WAVEFORMATEX header */
378
            int wavsize = put_wav_header(pb, enc);
379

    
380
            if (wavsize < 0)
381
                return -1;
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
            }
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 */
395
            put_bmp_header(pb, enc, codec_bmp_tags, 1);
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++) {
406
        AVCodec *p;
407

    
408
        enc = &s->streams[n]->codec;
409
        p = avcodec_find_encoder(enc->codec_id);
410

    
411
        put_le16(pb, asf->streams[n].num);
412
        put_str16(pb, p ? p->name : enc->codec_name);
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);
420
            put_le32(pb, codec_get_tag(codec_bmp_tags, enc->codec_id));
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;
429
    if (asf->is_streamed) {
430
        header_size += 8 + 30 + 50;
431

    
432
        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
433
        put_le16(pb, header_size);
434
        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
435
        put_le16(pb, header_size);
436

    
437
        header_size -= 8 + 30 + 50;
438
    }
439
    header_size += 24 + 6;
440
    url_fseek(pb, header_offset - 14, SEEK_SET);
441
    put_le64(pb, header_size);
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

    
455
static int asf_write_header(AVFormatContext *s)
456
{
457
    ASFContext *asf = s->priv_data;
458

    
459
    av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
460

    
461
    asf->packet_size = PACKET_SIZE;
462
    asf->nb_packets = 0;
463

    
464
    if (asf_write_header1(s, 0, 50) < 0) {
465
        //av_free(asf);
466
        return -1;
467
    }
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

    
481
static 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

    
490
/* write a fixed size packet */
491
static int put_packet(AVFormatContext *s,
492
                       unsigned int timestamp, unsigned int duration,
493
                       int nb_frames, int padsize)
494
{
495
    ASFContext *asf = s->priv_data;
496
    ByteIOContext *pb = &s->pb;
497
    int flags;
498

    
499
    if (asf->is_streamed) {
500
        put_chunk(s, 0x4424, asf->packet_size, 0);
501
    }
502

    
503
    put_byte(pb, 0x82);
504
    put_le16(pb, 0);
505

    
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)
516
        put_le16(pb, padsize - 2);
517
    if (flags & 0x08)
518
        put_byte(pb, padsize - 1);
519
    put_le32(pb, timestamp);
520
    put_le16(pb, duration);
521
    put_byte(pb, nb_frames | 0x80);
522

    
523
    return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
524
}
525

    
526
static void flush_packet(AVFormatContext *s)
527
{
528
    ASFContext *asf = s->priv_data;
529
    int hdr_size, ptr;
530

    
531
    hdr_size = put_packet(s, asf->packet_timestamp_start,
532
               asf->packet_timestamp_end - asf->packet_timestamp_start,
533
               asf->packet_nb_frames, asf->packet_size_left);
534

    
535
    /* Clear out the padding bytes */
536
    ptr = asf->packet_size - hdr_size - asf->packet_size_left;
537
    memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
538

    
539
    put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
540

    
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

    
551
static 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;
559
    if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
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
574
   crap. They have misread the MPEG Systems spec !
575
 */
576
static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
577
                      uint8_t *buf, int payload_size)
578
{
579
    ASFContext *asf = s->priv_data;
580
    int frag_pos, frag_len, frag_len1;
581

    
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;
589
            put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
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

    
609
static int asf_write_packet(AVFormatContext *s, int stream_index,
610
                            uint8_t *buf, int size, int timestamp)
611
{
612
    ASFContext *asf = s->priv_data;
613
    ASFStream *stream;
614
    int64_t duration;
615
    AVCodecContext *codec;
616

    
617
    codec = &s->streams[stream_index]->codec;
618
    stream = &asf->streams[stream_index];
619

    
620
    if (codec->codec_type == CODEC_TYPE_AUDIO) {
621
        duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
622
            codec->sample_rate;
623
    } else {
624
        duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
625
    }
626
    if (duration > asf->duration)
627
        asf->duration = duration;
628

    
629
    put_frame(s, stream, timestamp, buf, size);
630
    return 0;
631
}
632

    
633
static int asf_write_trailer(AVFormatContext *s)
634
{
635
    ASFContext *asf = s->priv_data;
636
    int64_t file_size;
637

    
638
    /* flush the current packet */
639
    if (asf->pb.buf_ptr > asf->pb.buffer)
640
        flush_packet(s);
641

    
642
    if (asf->is_streamed) {
643
        put_chunk(s, 0x4524, 0, 0); /* end of stream */
644
    } else {
645
        /* rewrite an updated header */
646
        file_size = url_ftell(&s->pb);
647
        url_fseek(&s->pb, 0, SEEK_SET);
648
        asf_write_header1(s, file_size, file_size - asf->data_offset);
649
    }
650

    
651
    put_flush_packet(&s->pb);
652
    return 0;
653
}
654

    
655
/**********************************/
656
/* decoding */
657

    
658
//#define DEBUG
659

    
660
#ifdef DEBUG
661
#define PRINT_IF_GUID(g,cmp) \
662
if (!memcmp(g, &cmp, sizeof(GUID))) \
663
    printf("(GUID: %s) ", #cmp)
664

    
665
static void print_guid(const GUID *g)
666
{
667
    int i;
668
    PRINT_IF_GUID(g, asf_header);
669
    else PRINT_IF_GUID(g, file_header);
670
    else PRINT_IF_GUID(g, stream_header);
671
    else PRINT_IF_GUID(g, audio_stream);
672
    else PRINT_IF_GUID(g, audio_conceal_none);
673
    else PRINT_IF_GUID(g, video_stream);
674
    else PRINT_IF_GUID(g, video_conceal_none);
675
    else PRINT_IF_GUID(g, comment_header);
676
    else PRINT_IF_GUID(g, codec_comment_header);
677
    else PRINT_IF_GUID(g, codec_comment1_header);
678
    else PRINT_IF_GUID(g, data_header);
679
    else PRINT_IF_GUID(g, index_guid);
680
    else PRINT_IF_GUID(g, head1_guid);
681
    else PRINT_IF_GUID(g, head2_guid);
682
    else PRINT_IF_GUID(g, my_guid);
683
    else
684
        printf("(GUID: unknown) ");
685
    printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
686
    for(i=0;i<8;i++)
687
        printf(" 0x%02x,", g->v4[i]);
688
    printf("}\n");
689
}
690
#undef PRINT_IF_GUID(g,cmp)
691
#endif
692

    
693
static void get_guid(ByteIOContext *s, GUID *g)
694
{
695
    int i;
696

    
697
    g->v1 = get_le32(s);
698
    g->v2 = get_le16(s);
699
    g->v3 = get_le16(s);
700
    for(i=0;i<8;i++)
701
        g->v4[i] = get_byte(s);
702
}
703

    
704
#if 0
705
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
706
{
707
    int len, c;
708
    char *q;
709

710
    len = get_le16(pb);
711
    q = buf;
712
    while (len > 0) {
713
        c = get_le16(pb);
714
        if ((q - buf) < buf_size - 1)
715
            *q++ = c;
716
        len--;
717
    }
718
    *q = '\0';
719
}
720
#endif
721

    
722
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
723
{
724
    int c;
725
    char *q;
726

    
727
    q = buf;
728
    while (len > 0) {
729
        c = get_le16(pb);
730
        if ((q - buf) < buf_size - 1)
731
            *q++ = c;
732
        len-=2;
733
    }
734
    *q = '\0';
735
}
736

    
737
static int asf_probe(AVProbeData *pd)
738
{
739
    GUID g;
740
    const unsigned char *p;
741
    int i;
742

    
743
    /* check file header */
744
    if (pd->buf_size <= 32)
745
        return 0;
746
    p = pd->buf;
747
    g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
748
    p += 4;
749
    g.v2 = p[0] | (p[1] << 8);
750
    p += 2;
751
    g.v3 = p[0] | (p[1] << 8);
752
    p += 2;
753
    for(i=0;i<8;i++)
754
        g.v4[i] = *p++;
755

    
756
    if (!memcmp(&g, &asf_header, sizeof(GUID)))
757
        return AVPROBE_SCORE_MAX;
758
    else
759
        return 0;
760
}
761

    
762
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
763
{
764
    ASFContext *asf = s->priv_data;
765
    GUID g;
766
    ByteIOContext *pb = &s->pb;
767
    AVStream *st;
768
    ASFStream *asf_st;
769
    int size, i;
770
    int64_t gsize;
771

    
772
    av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
773

    
774
    get_guid(pb, &g);
775
    if (memcmp(&g, &asf_header, sizeof(GUID)))
776
        goto fail;
777
    get_le64(pb);
778
    get_le32(pb);
779
    get_byte(pb);
780
    get_byte(pb);
781
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
782
    for(;;) {
783
        get_guid(pb, &g);
784
        gsize = get_le64(pb);
785
#ifdef DEBUG
786
        printf("%08Lx: ", url_ftell(pb) - 24);
787
        print_guid(&g);
788
        printf("  size=0x%Lx\n", gsize);
789
#endif
790
        if (gsize < 24)
791
            goto fail;
792
        if (!memcmp(&g, &file_header, sizeof(GUID))) {
793
            get_guid(pb, &asf->hdr.guid);
794
            asf->hdr.file_size                = get_le64(pb);
795
            asf->hdr.create_time        = get_le64(pb);
796
            asf->hdr.packets_count        = get_le64(pb);
797
            asf->hdr.play_time                = get_le64(pb);
798
            asf->hdr.send_time                = get_le64(pb);
799
            asf->hdr.preroll                = get_le32(pb);
800
            asf->hdr.ignore                = get_le32(pb);
801
            asf->hdr.flags                = get_le32(pb);
802
            asf->hdr.min_pktsize        = get_le32(pb);
803
            asf->hdr.max_pktsize        = get_le32(pb);
804
            asf->hdr.max_bitrate        = get_le32(pb);
805
            asf->packet_size = asf->hdr.max_pktsize;
806
            asf->nb_packets = asf->hdr.packets_count;
807
        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
808
            int type, total_size, type_specific_size;
809
            unsigned int tag1;
810
            int64_t pos1, pos2;
811

    
812
            pos1 = url_ftell(pb);
813

    
814
            st = av_mallocz(sizeof(AVStream));
815
            if (!st)
816
                goto fail;
817
            avcodec_get_context_defaults(&st->codec);
818
            s->streams[s->nb_streams] = st;
819
            asf_st = av_mallocz(sizeof(ASFStream));
820
            if (!asf_st)
821
                goto fail;
822
            st->priv_data = asf_st;
823
            st->time_length = (asf->hdr.send_time - asf->hdr.preroll) / 10; // us
824
            get_guid(pb, &g);
825
            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
826
                type = CODEC_TYPE_AUDIO;
827
            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
828
                type = CODEC_TYPE_VIDEO;
829
            } else {
830
                goto fail;
831
            }
832
            get_guid(pb, &g);
833
            total_size = get_le64(pb);
834
            type_specific_size = get_le32(pb);
835
            get_le32(pb);
836
            st->id = get_le16(pb) & 0x7f; /* stream id */
837
            // mapping of asf ID to AV stream ID;
838
            asf->asfid2avid[st->id] = s->nb_streams++;
839

    
840
            get_le32(pb);
841
            st->codec.codec_type = type;
842
            st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
843
            if (type == CODEC_TYPE_AUDIO) {
844
                get_wav_header(pb, &st->codec, type_specific_size);
845
                /* We have to init the frame size at some point .... */
846
                pos2 = url_ftell(pb);
847
                if (gsize > (pos2 + 8 - pos1 + 24)) {
848
                    asf_st->ds_span = get_byte(pb);
849
                    asf_st->ds_packet_size = get_le16(pb);
850
                    asf_st->ds_chunk_size = get_le16(pb);
851
                    asf_st->ds_data_size = get_le16(pb);
852
                    asf_st->ds_silence_data = get_byte(pb);
853
                }
854
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
855
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
856
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
857
                if (asf_st->ds_span > 1) {
858
                    if (!asf_st->ds_chunk_size
859
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
860
                        asf_st->ds_span = 0; // disable descrambling
861
                }
862
                switch (st->codec.codec_id) {
863
                case CODEC_ID_MP3LAME:
864
                    st->codec.frame_size = MPA_FRAME_SIZE;
865
                    break;
866
                case CODEC_ID_PCM_S16LE:
867
                case CODEC_ID_PCM_S16BE:
868
                case CODEC_ID_PCM_U16LE:
869
                case CODEC_ID_PCM_U16BE:
870
                case CODEC_ID_PCM_S8:
871
                case CODEC_ID_PCM_U8:
872
                case CODEC_ID_PCM_ALAW:
873
                case CODEC_ID_PCM_MULAW:
874
                    st->codec.frame_size = 1;
875
                    break;
876
                default:
877
                    /* This is probably wrong, but it prevents a crash later */
878
                    st->codec.frame_size = 1;
879
                    break;
880
                }
881
            } else {
882
                get_le32(pb);
883
                get_le32(pb);
884
                get_byte(pb);
885
                size = get_le16(pb); /* size */
886
                get_le32(pb); /* size */
887
                st->codec.width = get_le32(pb);
888
                st->codec.height = get_le32(pb);
889
                /* not available for asf */
890
                get_le16(pb); /* panes */
891
                st->codec.bits_per_sample = get_le16(pb); /* depth */
892
                tag1 = get_le32(pb);
893
                url_fskip(pb, 20);
894
                if (size > 40) {
895
                    st->codec.extradata_size = size - 40;
896
                    st->codec.extradata = av_mallocz(st->codec.extradata_size);
897
                    get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
898
                }
899
                st->codec.codec_tag = tag1;
900
                st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
901
            }
902
            pos2 = url_ftell(pb);
903
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
904
        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
905
            break;
906
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
907
            int len1, len2, len3, len4, len5;
908

    
909
            len1 = get_le16(pb);
910
            len2 = get_le16(pb);
911
            len3 = get_le16(pb);
912
            len4 = get_le16(pb);
913
            len5 = get_le16(pb);
914
            get_str16_nolen(pb, len1, s->title, sizeof(s->title));
915
            get_str16_nolen(pb, len2, s->author, sizeof(s->author));
916
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
917
            get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
918
            url_fskip(pb, len5);
919
#if 0
920
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
921
            int v1, v2;
922
            get_guid(pb, &g);
923
            v1 = get_le32(pb);
924
            v2 = get_le16(pb);
925
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
926
            int len, v1, n, num;
927
            char str[256], *q;
928
            char tag[16];
929

930
            get_guid(pb, &g);
931
            print_guid(&g);
932

933
            n = get_le32(pb);
934
            for(i=0;i<n;i++) {
935
                num = get_le16(pb); /* stream number */
936
                get_str16(pb, str, sizeof(str));
937
                get_str16(pb, str, sizeof(str));
938
                len = get_le16(pb);
939
                q = tag;
940
                while (len > 0) {
941
                    v1 = get_byte(pb);
942
                    if ((q - tag) < sizeof(tag) - 1)
943
                        *q++ = v1;
944
                    len--;
945
                }
946
                *q = '\0';
947
            }
948
#endif
949
        } else if (url_feof(pb)) {
950
            goto fail;
951
        } else {
952
            url_fseek(pb, gsize - 24, SEEK_CUR);
953
        }
954
    }
955
    get_guid(pb, &g);
956
    get_le64(pb);
957
    get_byte(pb);
958
    get_byte(pb);
959
    if (url_feof(pb))
960
        goto fail;
961
    asf->data_offset = url_ftell(pb);
962
    asf->packet_size_left = 0;
963

    
964
    return 0;
965

    
966
 fail:
967
     for(i=0;i<s->nb_streams;i++) {
968
        AVStream *st = s->streams[i];
969
        if (st) {
970
            av_free(st->priv_data);
971
            av_free(st->codec.extradata);
972
        }
973
        av_free(st);
974
    }
975
    return -1;
976
}
977

    
978
#define DO_2BITS(bits, var, defval) \
979
    switch (bits & 3) \
980
    { \
981
    case 3: var = get_le32(pb); rsize += 4; break; \
982
    case 2: var = get_le16(pb); rsize += 2; break; \
983
    case 1: var = get_byte(pb); rsize++; break; \
984
    default: var = defval; break; \
985
    }
986

    
987
static int asf_get_packet(AVFormatContext *s)
988
{
989
    ASFContext *asf = s->priv_data;
990
    ByteIOContext *pb = &s->pb;
991
    uint32_t packet_length, padsize;
992
    int rsize = 11;
993
    int c = get_byte(pb);
994
    if (c != 0x82) {
995
        if (!url_feof(pb))
996
            printf("ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
997
        return -EIO;
998
    }
999
    if ((c & 0x0f) == 2) { // always true for now
1000
        if (get_le16(pb) != 0) {
1001
            if (!url_feof(pb))
1002
                printf("ff asf bad non zero\n");
1003
            return -EIO;
1004
        }
1005
    }
1006

    
1007
    asf->packet_flags = get_byte(pb);
1008
    asf->packet_property = get_byte(pb);
1009

    
1010
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
1011
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1012
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1013

    
1014
    asf->packet_timestamp = get_le32(pb);
1015
    get_le16(pb); /* duration */
1016
    // rsize has at least 11 bytes which have to be present
1017

    
1018
    if (asf->packet_flags & 0x01) {
1019
        asf->packet_segsizetype = get_byte(pb); rsize++;
1020
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
1021
    } else {
1022
        asf->packet_segments = 1;
1023
        asf->packet_segsizetype = 0x80;
1024
    }
1025
    asf->packet_size_left = packet_length - padsize - rsize;
1026
    if (packet_length < asf->hdr.min_pktsize)
1027
        padsize += asf->hdr.min_pktsize - packet_length;
1028
    asf->packet_padsize = padsize;
1029
#ifdef DEBUG
1030
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
1031
#endif
1032
    return 0;
1033
}
1034

    
1035
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1036
{
1037
    ASFContext *asf = s->priv_data;
1038
    ASFStream *asf_st = 0;
1039
    ByteIOContext *pb = &s->pb;
1040
    //static int pc = 0;
1041
    for (;;) {
1042
        int rsize = 0;
1043
        if (asf->packet_size_left < FRAME_HEADER_SIZE
1044
            || asf->packet_segments < 1) {
1045
            //asf->packet_size_left <= asf->packet_padsize) {
1046
            int ret = asf->packet_size_left + asf->packet_padsize;
1047
            //printf("PacketLeftSize:%d  Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
1048
            /* fail safe */
1049
            url_fskip(pb, ret);
1050
            ret = asf_get_packet(s);
1051
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
1052
            if (ret < 0 || url_feof(pb))
1053
                return -EIO;
1054
            asf->packet_time_start = 0;
1055
            continue;
1056
        }
1057
        if (asf->packet_time_start == 0) {
1058
            /* read frame header */
1059
            int num = get_byte(pb);
1060
            asf->packet_segments--;
1061
            rsize++;
1062
            asf->packet_key_frame = (num & 0x80) >> 7;
1063
            asf->stream_index = asf->asfid2avid[num & 0x7f];
1064
            // sequence should be ignored!
1065
            DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1066
            DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1067
            DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1068

    
1069
            if (asf->packet_replic_size > 1) {
1070
                // it should be always at least 8 bytes - FIXME validate
1071
                asf->packet_obj_size = get_le32(pb);
1072
                asf->packet_frag_timestamp = get_le32(pb); // timestamp
1073
                if (asf->packet_replic_size > 8)
1074
                    url_fskip(pb, asf->packet_replic_size - 8);
1075
                rsize += asf->packet_replic_size; // FIXME - check validity
1076
            } else {
1077
                // multipacket - frag_offset is begining timestamp
1078
                asf->packet_time_start = asf->packet_frag_offset;
1079
                asf->packet_frag_offset = 0;
1080
                asf->packet_frag_timestamp = asf->packet_timestamp;
1081

    
1082
                if (asf->packet_replic_size == 1) {
1083
                    asf->packet_time_delta = get_byte(pb);
1084
                    rsize++;
1085
                }
1086
            }
1087
            if (asf->packet_flags & 0x01) {
1088
                DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1089
#undef DO_2BITS
1090
                //printf("Fragsize %d\n", asf->packet_frag_size);
1091
            } else {
1092
                asf->packet_frag_size = asf->packet_size_left - rsize;
1093
                //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
1094
            }
1095
            if (asf->packet_replic_size == 1) {
1096
                asf->packet_multi_size = asf->packet_frag_size;
1097
                if (asf->packet_multi_size > asf->packet_size_left) {
1098
                    asf->packet_segments = 0;
1099
                    continue;
1100
                }
1101
            }
1102
            asf->packet_size_left -= rsize;
1103
            //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1104

    
1105
            if (asf->stream_index < 0) {
1106
                asf->packet_time_start = 0;
1107
                /* unhandled packet (should not happen) */
1108
                url_fskip(pb, asf->packet_frag_size);
1109
                asf->packet_size_left -= asf->packet_frag_size;
1110
                printf("ff asf skip %d  %d\n", asf->packet_frag_size, num & 0x7f);
1111
                continue;
1112
            }
1113
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
1114
        }
1115
        asf_st = asf->asf_st;
1116

    
1117
        if ((asf->packet_frag_offset != asf_st->frag_offset
1118
             || (asf->packet_frag_offset
1119
                 && asf->packet_seq != asf_st->seq)) // seq should be ignored
1120
           ) {
1121
            /* cannot continue current packet: free it */
1122
            // FIXME better check if packet was already allocated
1123
            printf("ff asf parser skips: %d - %d     o:%d - %d    %d %d   fl:%d\n",
1124
                   asf_st->pkt.size,
1125
                   asf->packet_obj_size,
1126
                   asf->packet_frag_offset, asf_st->frag_offset,
1127
                   asf->packet_seq, asf_st->seq, asf->packet_frag_size);
1128
            if (asf_st->pkt.size)
1129
                av_free_packet(&asf_st->pkt);
1130
            asf_st->frag_offset = 0;
1131
            if (asf->packet_frag_offset != 0) {
1132
                url_fskip(pb, asf->packet_frag_size);
1133
                printf("ff asf parser skiping %db\n", asf->packet_frag_size);
1134
                asf->packet_size_left -= asf->packet_frag_size;
1135
                continue;
1136
            }
1137
        }
1138
        if (asf->packet_replic_size == 1) {
1139
            // frag_offset is here used as the begining timestamp
1140
            asf->packet_frag_timestamp = asf->packet_time_start;
1141
            asf->packet_time_start += asf->packet_time_delta;
1142
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
1143
            asf->packet_size_left--;
1144
            asf->packet_multi_size--;
1145
            if (asf->packet_multi_size < asf->packet_obj_size)
1146
            {
1147
                asf->packet_time_start = 0;
1148
                url_fskip(pb, asf->packet_multi_size);
1149
                asf->packet_size_left -= asf->packet_multi_size;
1150
                continue;
1151
            }
1152
            asf->packet_multi_size -= asf->packet_obj_size;
1153
            //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);
1154
        }
1155
        if (asf_st->frag_offset == 0) {
1156
            /* new packet */
1157
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1158
            asf_st->seq = asf->packet_seq;
1159
            asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1160
            asf_st->pkt.stream_index = asf->stream_index;
1161
            if (asf->packet_key_frame)
1162
                asf_st->pkt.flags |= PKT_FLAG_KEY;
1163
        }
1164

    
1165
        /* read data */
1166
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
1167
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1168
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1169
        asf->packet_size_left -= asf->packet_frag_size;
1170
        if (asf->packet_size_left < 0)
1171
            continue;
1172
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
1173
                   asf->packet_frag_size);
1174
        asf_st->frag_offset += asf->packet_frag_size;
1175
        /* test if whole packet is read */
1176
        if (asf_st->frag_offset == asf_st->pkt.size) {
1177
            /* return packet */
1178
            if (asf_st->ds_span > 1) {
1179
                /* packet descrambling */
1180
                char* newdata = av_malloc(asf_st->pkt.size);
1181
                if (newdata) {
1182
                    int offset = 0;
1183
                    while (offset < asf_st->pkt.size) {
1184
                        int off = offset / asf_st->ds_chunk_size;
1185
                        int row = off / asf_st->ds_span;
1186
                        int col = off % asf_st->ds_span;
1187
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1188
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
1189
                        memcpy(newdata + offset,
1190
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1191
                               asf_st->ds_chunk_size);
1192
                        offset += asf_st->ds_chunk_size;
1193
                    }
1194
                    av_free(asf_st->pkt.data);
1195
                    asf_st->pkt.data = newdata;
1196
                }
1197
            }
1198
            asf_st->frag_offset = 0;
1199
            memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
1200
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1201
            asf_st->pkt.size = 0;
1202
            asf_st->pkt.data = 0;
1203
            break; // packet completed
1204
        }
1205
    }
1206
    return 0;
1207
}
1208

    
1209
static int asf_read_close(AVFormatContext *s)
1210
{
1211
    int i;
1212

    
1213
    for(i=0;i<s->nb_streams;i++) {
1214
        AVStream *st = s->streams[i];
1215
        av_free(st->priv_data);
1216
        av_free(st->codec.extradata);
1217
    }
1218
    return 0;
1219
}
1220

    
1221
static int asf_read_seek(AVFormatContext *s, int64_t pts)
1222
{
1223
    printf("SEEK TO %lld", pts);
1224
    return -1;
1225
}
1226

    
1227
static AVInputFormat asf_iformat = {
1228
    "asf",
1229
    "asf format",
1230
    sizeof(ASFContext),
1231
    asf_probe,
1232
    asf_read_header,
1233
    asf_read_packet,
1234
    asf_read_close,
1235
    asf_read_seek,
1236
};
1237

    
1238
static AVOutputFormat asf_oformat = {
1239
    "asf",
1240
    "asf format",
1241
    "video/x-ms-asf",
1242
    "asf,wmv",
1243
    sizeof(ASFContext),
1244
#ifdef CONFIG_MP3LAME
1245
    CODEC_ID_MP3LAME,
1246
#else
1247
    CODEC_ID_MP2,
1248
#endif
1249
    CODEC_ID_MSMPEG4V3,
1250
    asf_write_header,
1251
    asf_write_packet,
1252
    asf_write_trailer,
1253
};
1254

    
1255
static AVOutputFormat asf_stream_oformat = {
1256
    "asf_stream",
1257
    "asf format",
1258
    "video/x-ms-asf",
1259
    "asf,wmv",
1260
    sizeof(ASFContext),
1261
#ifdef CONFIG_MP3LAME
1262
    CODEC_ID_MP3LAME,
1263
#else
1264
    CODEC_ID_MP2,
1265
#endif
1266
    CODEC_ID_MSMPEG4V3,
1267
    asf_write_stream_header,
1268
    asf_write_packet,
1269
    asf_write_trailer,
1270
};
1271

    
1272
int asf_init(void)
1273
{
1274
    av_register_input_format(&asf_iformat);
1275
    av_register_output_format(&asf_oformat);
1276
    av_register_output_format(&asf_stream_oformat);
1277
    return 0;
1278
}