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ffmpeg / libavformat / asf.c @ 8c653280

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1 de6d9b64 Fabrice Bellard
/*
2
 * ASF compatible encoder and decoder.
3 19720f15 Fabrice Bellard
 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 19720f15 Fabrice Bellard
 * 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 de6d9b64 Fabrice Bellard
 *
10 19720f15 Fabrice Bellard
 * This library is distributed in the hope that it will be useful,
11 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * Lesser General Public License for more details.
14 de6d9b64 Fabrice Bellard
 *
15 19720f15 Fabrice Bellard
 * 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 de6d9b64 Fabrice Bellard
 */
19
#include "avformat.h"
20
#include "avi.h"
21 f80c1ac0 Philip Gladstone
#include "mpegaudio.h"
22 de6d9b64 Fabrice Bellard
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 2a10020b Zdenek Kabelac
    int timestamp;
34 0c1a9eda Zdenek Kabelac
    int64_t duration;
35 2a10020b Zdenek Kabelac
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 de6d9b64 Fabrice Bellard
} ASFStream;
43
44
typedef struct {
45 0c1a9eda Zdenek Kabelac
    uint32_t v1;
46
    uint16_t v2;
47
    uint16_t v3;
48
    uint8_t v4[8];
49 2a10020b Zdenek Kabelac
} GUID;
50
51 247eadca Fabrice Bellard
typedef struct {
52 2a10020b Zdenek Kabelac
    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
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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
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 de6d9b64 Fabrice Bellard
    int seqno;
81
    int packet_size;
82 8b3c13f9 Philip Gladstone
    int is_streamed;
83 2141dc37 Zdenek Kabelac
    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 de6d9b64 Fabrice Bellard
    /* non streamed additonnal info */
86 0c1a9eda Zdenek Kabelac
    int64_t nb_packets;
87
    int64_t duration; /* in 100ns units */
88 de6d9b64 Fabrice Bellard
    /* packet filling */
89
    int packet_size_left;
90
    int packet_timestamp_start;
91
    int packet_timestamp_end;
92
    int packet_nb_frames;
93 0c1a9eda Zdenek Kabelac
    uint8_t packet_buf[PACKET_SIZE];
94 de6d9b64 Fabrice Bellard
    ByteIOContext pb;
95
    /* only for reading */
96 2a10020b Zdenek Kabelac
    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 de6d9b64 Fabrice Bellard
    int packet_padsize;
109 2a10020b Zdenek Kabelac
    int packet_frag_offset;
110
    int packet_frag_size;
111
    int packet_frag_timestamp;
112 2141dc37 Zdenek Kabelac
    int packet_multi_size;
113 2a10020b Zdenek Kabelac
    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 de6d9b64 Fabrice Bellard
} 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 f80c1ac0 Philip Gladstone
    // 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 de6d9b64 Fabrice Bellard
};
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
};
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179 de6d9b64 Fabrice Bellard
/* 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 0c1a9eda Zdenek Kabelac
        c = (uint8_t)*tag++;
203 de6d9b64 Fabrice Bellard
        put_le16(s, c);
204 2a10020b Zdenek Kabelac
        if (c == '\0')
205 de6d9b64 Fabrice Bellard
            break;
206
    }
207
}
208
209
static void put_str16_nolen(ByteIOContext *s, const char *tag)
210
{
211
    int c;
212
213
    for(;;) {
214 0c1a9eda Zdenek Kabelac
        c = (uint8_t)*tag++;
215 de6d9b64 Fabrice Bellard
        put_le16(s, c);
216 2a10020b Zdenek Kabelac
        if (c == '\0')
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            break;
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    }
219
}
220
221 0c1a9eda Zdenek Kabelac
static int64_t put_header(ByteIOContext *pb, const GUID *g)
222 de6d9b64 Fabrice Bellard
{
223 0c1a9eda Zdenek Kabelac
    int64_t pos;
224 de6d9b64 Fabrice Bellard
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 0c1a9eda Zdenek Kabelac
static void end_header(ByteIOContext *pb, int64_t pos)
233 de6d9b64 Fabrice Bellard
{
234 0c1a9eda Zdenek Kabelac
    int64_t pos1;
235 de6d9b64 Fabrice Bellard
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 f80c1ac0 Philip Gladstone
static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
244 de6d9b64 Fabrice Bellard
{
245
    ASFContext *asf = s->priv_data;
246
    ByteIOContext *pb = &s->pb;
247
    int length;
248
249
    length = payload_length + 8;
250 2a10020b Zdenek Kabelac
    put_le16(pb, type);
251
    put_le16(pb, length);
252 de6d9b64 Fabrice Bellard
    put_le32(pb, asf->seqno);
253 f80c1ac0 Philip Gladstone
    put_le16(pb, flags); /* unknown bytes */
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    put_le16(pb, length);
255
    asf->seqno++;
256
}
257
258
/* convert from unix to windows time */
259 0c1a9eda Zdenek Kabelac
static int64_t unix_to_file_time(int ti)
260 de6d9b64 Fabrice Bellard
{
261 0c1a9eda Zdenek Kabelac
    int64_t t;
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263 0c1a9eda Zdenek Kabelac
    t = ti * int64_t_C(10000000);
264
    t += int64_t_C(116444736000000000);
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    return t;
266
}
267
268
/* write the header (used two times if non streamed) */
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static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
270 de6d9b64 Fabrice Bellard
{
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 0c1a9eda Zdenek Kabelac
    int64_t header_offset, cur_pos, hpos;
277 f80c1ac0 Philip Gladstone
    int bit_rate;
278 de6d9b64 Fabrice Bellard
279 084fada8 Philip Gladstone
    has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
280 de6d9b64 Fabrice Bellard
281 f80c1ac0 Philip Gladstone
    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 8b3c13f9 Philip Gladstone
    if (asf->is_streamed) {
289 f80c1ac0 Philip Gladstone
        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
290 de6d9b64 Fabrice Bellard
    }
291 f80c1ac0 Philip Gladstone
292
    put_guid(pb, &asf_header);
293 2a10020b Zdenek Kabelac
    put_le64(pb, -1); /* header length, will be patched after */
294 f80c1ac0 Philip Gladstone
    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 2a10020b Zdenek Kabelac
298 de6d9b64 Fabrice Bellard
    /* 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 2a10020b Zdenek Kabelac
    put_le32(pb, 0); /* start time stamp */
309
    put_le32(pb, 0); /* ??? */
310
    put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
311 de6d9b64 Fabrice Bellard
    put_le32(pb, asf->packet_size); /* packet size */
312
    put_le32(pb, asf->packet_size); /* packet size */
313 f80c1ac0 Philip Gladstone
    put_le32(pb, bit_rate); /* Nominal data rate in bps */
314 de6d9b64 Fabrice Bellard
    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 0c1a9eda Zdenek Kabelac
        int64_t es_pos;
341 17a241dd Fabrice Bellard
        //        ASFStream *stream = &asf->streams[n];
342 f80c1ac0 Philip Gladstone
343 de6d9b64 Fabrice Bellard
        enc = &s->streams[n]->codec;
344
        asf->streams[n].num = n + 1;
345
        asf->streams[n].seq = 0;
346 2a10020b Zdenek Kabelac
347 de6d9b64 Fabrice Bellard
        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 f80c1ac0 Philip Gladstone
        es_pos = url_ftell(pb);
371 de6d9b64 Fabrice Bellard
        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 2a10020b Zdenek Kabelac
376 de6d9b64 Fabrice Bellard
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
377
            /* WAVEFORMATEX header */
378 f80c1ac0 Philip Gladstone
            int wavsize = put_wav_header(pb, enc);
379
380
            if (wavsize < 0)
381 46a3d068 Fabrice Bellard
                return -1;
382 f80c1ac0 Philip Gladstone
            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 de6d9b64 Fabrice Bellard
        } 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 2727c35e Philip Gladstone
            put_bmp_header(pb, enc, codec_bmp_tags, 1);
396 de6d9b64 Fabrice Bellard
        }
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 084fada8 Philip Gladstone
        AVCodec *p;
407
408 de6d9b64 Fabrice Bellard
        enc = &s->streams[n]->codec;
409 084fada8 Philip Gladstone
        p = avcodec_find_encoder(enc->codec_id);
410 de6d9b64 Fabrice Bellard
411
        put_le16(pb, asf->streams[n].num);
412 084fada8 Philip Gladstone
        put_str16(pb, p ? p->name : enc->codec_name);
413 de6d9b64 Fabrice Bellard
        put_le16(pb, 0); /* no parameters */
414 bd5a6020 Michael Niedermayer
        
415
        
416 de6d9b64 Fabrice Bellard
        /* id */
417
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
418
            put_le16(pb, 2);
419 bd5a6020 Michael Niedermayer
            if(!enc->codec_tag)
420
                enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
421
            if(!enc->codec_tag)
422
                return -1;
423
            put_le16(pb, enc->codec_tag);
424 de6d9b64 Fabrice Bellard
        } else {
425
            put_le16(pb, 4);
426 bd5a6020 Michael Niedermayer
            if(!enc->codec_tag)
427
                enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
428
            if(!enc->codec_tag)
429
                return -1;
430
            put_le32(pb, enc->codec_tag);
431 de6d9b64 Fabrice Bellard
        }
432
    }
433
    end_header(pb, hpos);
434
435
    /* patch the header size fields */
436
437
    cur_pos = url_ftell(pb);
438
    header_size = cur_pos - header_offset;
439 8b3c13f9 Philip Gladstone
    if (asf->is_streamed) {
440 f80c1ac0 Philip Gladstone
        header_size += 8 + 30 + 50;
441
442
        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
443 de6d9b64 Fabrice Bellard
        put_le16(pb, header_size);
444 f80c1ac0 Philip Gladstone
        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
445 de6d9b64 Fabrice Bellard
        put_le16(pb, header_size);
446 f80c1ac0 Philip Gladstone
447
        header_size -= 8 + 30 + 50;
448 de6d9b64 Fabrice Bellard
    }
449 f80c1ac0 Philip Gladstone
    header_size += 24 + 6;
450
    url_fseek(pb, header_offset - 14, SEEK_SET);
451
    put_le64(pb, header_size);
452 de6d9b64 Fabrice Bellard
    url_fseek(pb, cur_pos, SEEK_SET);
453
454
    /* movie chunk, followed by packets of packet_size */
455
    asf->data_offset = cur_pos;
456
    put_guid(pb, &data_header);
457
    put_le64(pb, data_chunk_size);
458
    put_guid(pb, &my_guid);
459
    put_le64(pb, asf->nb_packets); /* nb packets */
460
    put_byte(pb, 1); /* ??? */
461
    put_byte(pb, 1); /* ??? */
462
    return 0;
463
}
464
465
static int asf_write_header(AVFormatContext *s)
466
{
467 c9a65ca8 Fabrice Bellard
    ASFContext *asf = s->priv_data;
468 de6d9b64 Fabrice Bellard
469 17a241dd Fabrice Bellard
    av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
470
471 de6d9b64 Fabrice Bellard
    asf->packet_size = PACKET_SIZE;
472
    asf->nb_packets = 0;
473
474 f80c1ac0 Philip Gladstone
    if (asf_write_header1(s, 0, 50) < 0) {
475 2824c473 Philip Gladstone
        //av_free(asf);
476 46a3d068 Fabrice Bellard
        return -1;
477
    }
478 de6d9b64 Fabrice Bellard
479
    put_flush_packet(&s->pb);
480
481
    asf->packet_nb_frames = 0;
482
    asf->packet_timestamp_start = -1;
483
    asf->packet_timestamp_end = -1;
484
    asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
485
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
486
                  NULL, NULL, NULL, NULL);
487
488
    return 0;
489
}
490
491 8b3c13f9 Philip Gladstone
static int asf_write_stream_header(AVFormatContext *s)
492
{
493
    ASFContext *asf = s->priv_data;
494
495
    asf->is_streamed = 1;
496
497
    return asf_write_header(s);
498
}
499
500 de6d9b64 Fabrice Bellard
/* write a fixed size packet */
501 2a10020b Zdenek Kabelac
static int put_packet(AVFormatContext *s,
502
                       unsigned int timestamp, unsigned int duration,
503 de6d9b64 Fabrice Bellard
                       int nb_frames, int padsize)
504
{
505
    ASFContext *asf = s->priv_data;
506
    ByteIOContext *pb = &s->pb;
507
    int flags;
508
509 8b3c13f9 Philip Gladstone
    if (asf->is_streamed) {
510 f80c1ac0 Philip Gladstone
        put_chunk(s, 0x4424, asf->packet_size, 0);
511 de6d9b64 Fabrice Bellard
    }
512
513
    put_byte(pb, 0x82);
514
    put_le16(pb, 0);
515 2a10020b Zdenek Kabelac
516 de6d9b64 Fabrice Bellard
    flags = 0x01; /* nb segments present */
517
    if (padsize > 0) {
518
        if (padsize < 256)
519
            flags |= 0x08;
520
        else
521
            flags |= 0x10;
522
    }
523
    put_byte(pb, flags); /* flags */
524
    put_byte(pb, 0x5d);
525
    if (flags & 0x10)
526 f80c1ac0 Philip Gladstone
        put_le16(pb, padsize - 2);
527 de6d9b64 Fabrice Bellard
    if (flags & 0x08)
528 f80c1ac0 Philip Gladstone
        put_byte(pb, padsize - 1);
529 de6d9b64 Fabrice Bellard
    put_le32(pb, timestamp);
530
    put_le16(pb, duration);
531
    put_byte(pb, nb_frames | 0x80);
532 f80c1ac0 Philip Gladstone
533
    return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
534 de6d9b64 Fabrice Bellard
}
535
536
static void flush_packet(AVFormatContext *s)
537
{
538
    ASFContext *asf = s->priv_data;
539
    int hdr_size, ptr;
540 2a10020b Zdenek Kabelac
541
    hdr_size = put_packet(s, asf->packet_timestamp_start,
542
               asf->packet_timestamp_end - asf->packet_timestamp_start,
543 de6d9b64 Fabrice Bellard
               asf->packet_nb_frames, asf->packet_size_left);
544 2a10020b Zdenek Kabelac
545 f80c1ac0 Philip Gladstone
    /* Clear out the padding bytes */
546
    ptr = asf->packet_size - hdr_size - asf->packet_size_left;
547 de6d9b64 Fabrice Bellard
    memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
548 2a10020b Zdenek Kabelac
549 de6d9b64 Fabrice Bellard
    put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
550 2a10020b Zdenek Kabelac
551 de6d9b64 Fabrice Bellard
    put_flush_packet(&s->pb);
552
    asf->nb_packets++;
553
    asf->packet_nb_frames = 0;
554
    asf->packet_timestamp_start = -1;
555
    asf->packet_timestamp_end = -1;
556
    asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
557
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
558
                  NULL, NULL, NULL, NULL);
559
}
560
561
static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
562
                             int payload_size, int frag_offset, int frag_len)
563
{
564
    ASFContext *asf = s->priv_data;
565
    ByteIOContext *pb = &asf->pb;
566
    int val;
567
568
    val = stream->num;
569 492cd3a9 Michael Niedermayer
    if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
570 de6d9b64 Fabrice Bellard
        val |= 0x80;
571
    put_byte(pb, val);
572
    put_byte(pb, stream->seq);
573
    put_le32(pb, frag_offset); /* fragment offset */
574
    put_byte(pb, 0x08); /* flags */
575
    put_le32(pb, payload_size);
576
    put_le32(pb, timestamp);
577
    put_le16(pb, frag_len);
578
}
579
580
581
/* Output a frame. We suppose that payload_size <= PACKET_SIZE.
582

583
   It is there that you understand that the ASF format is really
584 2a10020b Zdenek Kabelac
   crap. They have misread the MPEG Systems spec !
585 de6d9b64 Fabrice Bellard
 */
586
static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
587 0c1a9eda Zdenek Kabelac
                      uint8_t *buf, int payload_size)
588 de6d9b64 Fabrice Bellard
{
589
    ASFContext *asf = s->priv_data;
590
    int frag_pos, frag_len, frag_len1;
591 2a10020b Zdenek Kabelac
592 de6d9b64 Fabrice Bellard
    frag_pos = 0;
593
    while (frag_pos < payload_size) {
594
        frag_len = payload_size - frag_pos;
595
        frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
596
        if (frag_len1 > 0) {
597
            if (frag_len > frag_len1)
598
                frag_len = frag_len1;
599 b13a517f Philip Gladstone
            put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
600 de6d9b64 Fabrice Bellard
            put_buffer(&asf->pb, buf, frag_len);
601
            asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
602
            asf->packet_timestamp_end = timestamp;
603
            if (asf->packet_timestamp_start == -1)
604
                asf->packet_timestamp_start = timestamp;
605
            asf->packet_nb_frames++;
606
        } else {
607
            frag_len = 0;
608
        }
609
        frag_pos += frag_len;
610
        buf += frag_len;
611
        /* output the frame if filled */
612
        if (asf->packet_size_left <= FRAME_HEADER_SIZE)
613
            flush_packet(s);
614
    }
615
    stream->seq++;
616
}
617
618
619
static int asf_write_packet(AVFormatContext *s, int stream_index,
620 0c1a9eda Zdenek Kabelac
                            uint8_t *buf, int size, int timestamp)
621 de6d9b64 Fabrice Bellard
{
622
    ASFContext *asf = s->priv_data;
623 e0d2714a Juanjo
    ASFStream *stream;
624 0c1a9eda Zdenek Kabelac
    int64_t duration;
625 de6d9b64 Fabrice Bellard
    AVCodecContext *codec;
626
627
    codec = &s->streams[stream_index]->codec;
628 e0d2714a Juanjo
    stream = &asf->streams[stream_index];
629 2a10020b Zdenek Kabelac
630 de6d9b64 Fabrice Bellard
    if (codec->codec_type == CODEC_TYPE_AUDIO) {
631 0c1a9eda Zdenek Kabelac
        duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
632 de6d9b64 Fabrice Bellard
            codec->sample_rate;
633
    } else {
634 14bea432 Michael Niedermayer
        duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
635 de6d9b64 Fabrice Bellard
    }
636
    if (duration > asf->duration)
637
        asf->duration = duration;
638 2a10020b Zdenek Kabelac
639 e0d2714a Juanjo
    put_frame(s, stream, timestamp, buf, size);
640 de6d9b64 Fabrice Bellard
    return 0;
641
}
642 2a10020b Zdenek Kabelac
643 de6d9b64 Fabrice Bellard
static int asf_write_trailer(AVFormatContext *s)
644
{
645
    ASFContext *asf = s->priv_data;
646 0c1a9eda Zdenek Kabelac
    int64_t file_size;
647 de6d9b64 Fabrice Bellard
648
    /* flush the current packet */
649
    if (asf->pb.buf_ptr > asf->pb.buffer)
650
        flush_packet(s);
651
652 8b3c13f9 Philip Gladstone
    if (asf->is_streamed) {
653 f80c1ac0 Philip Gladstone
        put_chunk(s, 0x4524, 0, 0); /* end of stream */
654 de6d9b64 Fabrice Bellard
    } else {
655
        /* rewrite an updated header */
656
        file_size = url_ftell(&s->pb);
657
        url_fseek(&s->pb, 0, SEEK_SET);
658
        asf_write_header1(s, file_size, file_size - asf->data_offset);
659
    }
660
661
    put_flush_packet(&s->pb);
662
    return 0;
663
}
664
665
/**********************************/
666
/* decoding */
667
668
//#define DEBUG
669
670
#ifdef DEBUG
671 5082f759 François Revol
#define PRINT_IF_GUID(g,cmp) \
672
if (!memcmp(g, &cmp, sizeof(GUID))) \
673
    printf("(GUID: %s) ", #cmp)
674
675 de6d9b64 Fabrice Bellard
static void print_guid(const GUID *g)
676
{
677
    int i;
678 5082f759 François Revol
    PRINT_IF_GUID(g, asf_header);
679
    else PRINT_IF_GUID(g, file_header);
680
    else PRINT_IF_GUID(g, stream_header);
681
    else PRINT_IF_GUID(g, audio_stream);
682
    else PRINT_IF_GUID(g, audio_conceal_none);
683
    else PRINT_IF_GUID(g, video_stream);
684
    else PRINT_IF_GUID(g, video_conceal_none);
685
    else PRINT_IF_GUID(g, comment_header);
686
    else PRINT_IF_GUID(g, codec_comment_header);
687
    else PRINT_IF_GUID(g, codec_comment1_header);
688
    else PRINT_IF_GUID(g, data_header);
689
    else PRINT_IF_GUID(g, index_guid);
690
    else PRINT_IF_GUID(g, head1_guid);
691
    else PRINT_IF_GUID(g, head2_guid);
692
    else PRINT_IF_GUID(g, my_guid);
693
    else
694
        printf("(GUID: unknown) ");
695 de6d9b64 Fabrice Bellard
    printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
696 2a10020b Zdenek Kabelac
    for(i=0;i<8;i++)
697 de6d9b64 Fabrice Bellard
        printf(" 0x%02x,", g->v4[i]);
698
    printf("}\n");
699
}
700 5082f759 François Revol
#undef PRINT_IF_GUID(g,cmp)
701 de6d9b64 Fabrice Bellard
#endif
702
703
static void get_guid(ByteIOContext *s, GUID *g)
704
{
705
    int i;
706
707
    g->v1 = get_le32(s);
708
    g->v2 = get_le16(s);
709
    g->v3 = get_le16(s);
710
    for(i=0;i<8;i++)
711
        g->v4[i] = get_byte(s);
712
}
713
714
#if 0
715
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
716
{
717
    int len, c;
718
    char *q;
719

720
    len = get_le16(pb);
721
    q = buf;
722
    while (len > 0) {
723
        c = get_le16(pb);
724
        if ((q - buf) < buf_size - 1)
725
            *q++ = c;
726
        len--;
727
    }
728
    *q = '\0';
729
}
730
#endif
731
732
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
733
{
734
    int c;
735
    char *q;
736
737
    q = buf;
738
    while (len > 0) {
739
        c = get_le16(pb);
740
        if ((q - buf) < buf_size - 1)
741
            *q++ = c;
742
        len-=2;
743
    }
744
    *q = '\0';
745
}
746
747 c9a65ca8 Fabrice Bellard
static int asf_probe(AVProbeData *pd)
748
{
749
    GUID g;
750
    const unsigned char *p;
751
    int i;
752
753
    /* check file header */
754
    if (pd->buf_size <= 32)
755
        return 0;
756
    p = pd->buf;
757
    g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
758
    p += 4;
759
    g.v2 = p[0] | (p[1] << 8);
760
    p += 2;
761
    g.v3 = p[0] | (p[1] << 8);
762
    p += 2;
763
    for(i=0;i<8;i++)
764
        g.v4[i] = *p++;
765
766
    if (!memcmp(&g, &asf_header, sizeof(GUID)))
767
        return AVPROBE_SCORE_MAX;
768
    else
769
        return 0;
770
}
771
772 de6d9b64 Fabrice Bellard
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
773
{
774 c9a65ca8 Fabrice Bellard
    ASFContext *asf = s->priv_data;
775 de6d9b64 Fabrice Bellard
    GUID g;
776
    ByteIOContext *pb = &s->pb;
777
    AVStream *st;
778
    ASFStream *asf_st;
779 e095026a Fabrice Bellard
    int size, i;
780 0c1a9eda Zdenek Kabelac
    int64_t gsize;
781 de6d9b64 Fabrice Bellard
782 17a241dd Fabrice Bellard
    av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
783
784 de6d9b64 Fabrice Bellard
    get_guid(pb, &g);
785
    if (memcmp(&g, &asf_header, sizeof(GUID)))
786
        goto fail;
787
    get_le64(pb);
788
    get_le32(pb);
789
    get_byte(pb);
790
    get_byte(pb);
791 2141dc37 Zdenek Kabelac
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
792 de6d9b64 Fabrice Bellard
    for(;;) {
793
        get_guid(pb, &g);
794
        gsize = get_le64(pb);
795
#ifdef DEBUG
796
        printf("%08Lx: ", url_ftell(pb) - 24);
797
        print_guid(&g);
798
        printf("  size=0x%Lx\n", gsize);
799
#endif
800
        if (gsize < 24)
801
            goto fail;
802
        if (!memcmp(&g, &file_header, sizeof(GUID))) {
803 2a10020b Zdenek Kabelac
            get_guid(pb, &asf->hdr.guid);
804
            asf->hdr.file_size                = get_le64(pb);
805
            asf->hdr.create_time        = get_le64(pb);
806
            asf->hdr.packets_count        = get_le64(pb);
807
            asf->hdr.play_time                = get_le64(pb);
808
            asf->hdr.send_time                = get_le64(pb);
809
            asf->hdr.preroll                = get_le32(pb);
810
            asf->hdr.ignore                = get_le32(pb);
811
            asf->hdr.flags                = get_le32(pb);
812
            asf->hdr.min_pktsize        = get_le32(pb);
813
            asf->hdr.max_pktsize        = get_le32(pb);
814
            asf->hdr.max_bitrate        = get_le32(pb);
815 2141dc37 Zdenek Kabelac
            asf->packet_size = asf->hdr.max_pktsize;
816
            asf->nb_packets = asf->hdr.packets_count;
817 de6d9b64 Fabrice Bellard
        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
818 2e7973bb Roman Shaposhnik
            int type, total_size, type_specific_size;
819 de6d9b64 Fabrice Bellard
            unsigned int tag1;
820 0c1a9eda Zdenek Kabelac
            int64_t pos1, pos2;
821 2a10020b Zdenek Kabelac
822 de6d9b64 Fabrice Bellard
            pos1 = url_ftell(pb);
823
824 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
825 de6d9b64 Fabrice Bellard
            if (!st)
826
                goto fail;
827
            asf_st = av_mallocz(sizeof(ASFStream));
828
            if (!asf_st)
829
                goto fail;
830
            st->priv_data = asf_st;
831 247eadca Fabrice Bellard
            st->start_time = asf->hdr.preroll / (10000000 / AV_TIME_BASE);
832
            st->duration = (asf->hdr.send_time - asf->hdr.preroll) / 
833
                (10000000 / AV_TIME_BASE);
834 de6d9b64 Fabrice Bellard
            get_guid(pb, &g);
835
            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
836
                type = CODEC_TYPE_AUDIO;
837
            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
838
                type = CODEC_TYPE_VIDEO;
839
            } else {
840
                goto fail;
841
            }
842
            get_guid(pb, &g);
843
            total_size = get_le64(pb);
844 2e7973bb Roman Shaposhnik
            type_specific_size = get_le32(pb);
845 de6d9b64 Fabrice Bellard
            get_le32(pb);
846 2a10020b Zdenek Kabelac
            st->id = get_le16(pb) & 0x7f; /* stream id */
847
            // mapping of asf ID to AV stream ID;
848 247eadca Fabrice Bellard
            asf->asfid2avid[st->id] = s->nb_streams - 1;
849 2a10020b Zdenek Kabelac
850 de6d9b64 Fabrice Bellard
            get_le32(pb);
851 2141dc37 Zdenek Kabelac
            st->codec.codec_type = type;
852 41568e4a Zdenek Kabelac
            st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
853 de6d9b64 Fabrice Bellard
            if (type == CODEC_TYPE_AUDIO) {
854 2e7973bb Roman Shaposhnik
                get_wav_header(pb, &st->codec, type_specific_size);
855 2a10020b Zdenek Kabelac
                /* We have to init the frame size at some point .... */
856
                pos2 = url_ftell(pb);
857 2141dc37 Zdenek Kabelac
                if (gsize > (pos2 + 8 - pos1 + 24)) {
858 2a10020b Zdenek Kabelac
                    asf_st->ds_span = get_byte(pb);
859
                    asf_st->ds_packet_size = get_le16(pb);
860
                    asf_st->ds_chunk_size = get_le16(pb);
861
                    asf_st->ds_data_size = get_le16(pb);
862
                    asf_st->ds_silence_data = get_byte(pb);
863
                }
864
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
865
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
866
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
867 2141dc37 Zdenek Kabelac
                if (asf_st->ds_span > 1) {
868 2a10020b Zdenek Kabelac
                    if (!asf_st->ds_chunk_size
869
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
870
                        asf_st->ds_span = 0; // disable descrambling
871
                }
872 f80c1ac0 Philip Gladstone
                switch (st->codec.codec_id) {
873 80783dc2 Fabrice Bellard
                case CODEC_ID_MP3:
874 f80c1ac0 Philip Gladstone
                    st->codec.frame_size = MPA_FRAME_SIZE;
875
                    break;
876
                case CODEC_ID_PCM_S16LE:
877
                case CODEC_ID_PCM_S16BE:
878
                case CODEC_ID_PCM_U16LE:
879
                case CODEC_ID_PCM_U16BE:
880
                case CODEC_ID_PCM_S8:
881
                case CODEC_ID_PCM_U8:
882
                case CODEC_ID_PCM_ALAW:
883
                case CODEC_ID_PCM_MULAW:
884
                    st->codec.frame_size = 1;
885
                    break;
886
                default:
887
                    /* This is probably wrong, but it prevents a crash later */
888
                    st->codec.frame_size = 1;
889
                    break;
890
                }
891 de6d9b64 Fabrice Bellard
            } else {
892 2141dc37 Zdenek Kabelac
                get_le32(pb);
893 de6d9b64 Fabrice Bellard
                get_le32(pb);
894
                get_byte(pb);
895
                size = get_le16(pb); /* size */
896
                get_le32(pb); /* size */
897
                st->codec.width = get_le32(pb);
898 2a10020b Zdenek Kabelac
                st->codec.height = get_le32(pb);
899
                /* not available for asf */
900 de6d9b64 Fabrice Bellard
                get_le16(pb); /* panes */
901 693feac5 Zdenek Kabelac
                st->codec.bits_per_sample = get_le16(pb); /* depth */
902 de6d9b64 Fabrice Bellard
                tag1 = get_le32(pb);
903 2141dc37 Zdenek Kabelac
                url_fskip(pb, 20);
904
                if (size > 40) {
905 e40fed0b Zdenek Kabelac
                    st->codec.extradata_size = size - 40;
906
                    st->codec.extradata = av_mallocz(st->codec.extradata_size);
907
                    get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
908 2141dc37 Zdenek Kabelac
                }
909 7004ffb3 Michael Niedermayer
                st->codec.codec_tag = tag1;
910 17a241dd Fabrice Bellard
                st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
911 de6d9b64 Fabrice Bellard
            }
912
            pos2 = url_ftell(pb);
913
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
914
        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
915
            break;
916
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
917
            int len1, len2, len3, len4, len5;
918
919
            len1 = get_le16(pb);
920
            len2 = get_le16(pb);
921
            len3 = get_le16(pb);
922
            len4 = get_le16(pb);
923
            len5 = get_le16(pb);
924
            get_str16_nolen(pb, len1, s->title, sizeof(s->title));
925
            get_str16_nolen(pb, len2, s->author, sizeof(s->author));
926
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
927
            get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
928 2141dc37 Zdenek Kabelac
            url_fskip(pb, len5);
929 de6d9b64 Fabrice Bellard
#if 0
930
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
931
            int v1, v2;
932
            get_guid(pb, &g);
933
            v1 = get_le32(pb);
934
            v2 = get_le16(pb);
935
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
936
            int len, v1, n, num;
937
            char str[256], *q;
938
            char tag[16];
939

940
            get_guid(pb, &g);
941
            print_guid(&g);
942 2a10020b Zdenek Kabelac

943 de6d9b64 Fabrice Bellard
            n = get_le32(pb);
944
            for(i=0;i<n;i++) {
945
                num = get_le16(pb); /* stream number */
946
                get_str16(pb, str, sizeof(str));
947
                get_str16(pb, str, sizeof(str));
948
                len = get_le16(pb);
949
                q = tag;
950
                while (len > 0) {
951
                    v1 = get_byte(pb);
952
                    if ((q - tag) < sizeof(tag) - 1)
953
                        *q++ = v1;
954
                    len--;
955
                }
956
                *q = '\0';
957
            }
958
#endif
959
        } else if (url_feof(pb)) {
960
            goto fail;
961
        } else {
962
            url_fseek(pb, gsize - 24, SEEK_CUR);
963
        }
964
    }
965
    get_guid(pb, &g);
966
    get_le64(pb);
967
    get_byte(pb);
968
    get_byte(pb);
969 2141dc37 Zdenek Kabelac
    if (url_feof(pb))
970
        goto fail;
971
    asf->data_offset = url_ftell(pb);
972 de6d9b64 Fabrice Bellard
    asf->packet_size_left = 0;
973
974
    return 0;
975
976
 fail:
977 4c3dff6d Zdenek Kabelac
     for(i=0;i<s->nb_streams;i++) {
978 de6d9b64 Fabrice Bellard
        AVStream *st = s->streams[i];
979 4c3dff6d Zdenek Kabelac
        if (st) {
980 2141dc37 Zdenek Kabelac
            av_free(st->priv_data);
981 4c3dff6d Zdenek Kabelac
            av_free(st->codec.extradata);
982
        }
983 1ea4f593 Fabrice Bellard
        av_free(st);
984 de6d9b64 Fabrice Bellard
    }
985
    return -1;
986
}
987
988 2a10020b Zdenek Kabelac
#define DO_2BITS(bits, var, defval) \
989
    switch (bits & 3) \
990
    { \
991
    case 3: var = get_le32(pb); rsize += 4; break; \
992
    case 2: var = get_le16(pb); rsize += 2; break; \
993
    case 1: var = get_byte(pb); rsize++; break; \
994
    default: var = defval; break; \
995
    }
996
997 de6d9b64 Fabrice Bellard
static int asf_get_packet(AVFormatContext *s)
998
{
999
    ASFContext *asf = s->priv_data;
1000
    ByteIOContext *pb = &s->pb;
1001 2a10020b Zdenek Kabelac
    uint32_t packet_length, padsize;
1002
    int rsize = 11;
1003
    int c = get_byte(pb);
1004 1359c2d4 Zdenek Kabelac
    if (c != 0x82) {
1005 5acdd6e6 Zdenek Kabelac
        if (!url_feof(pb))
1006 4cfbf61b Falk Hüffner
            printf("ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
1007 2a10020b Zdenek Kabelac
        return -EIO;
1008
    }
1009
    if ((c & 0x0f) == 2) { // always true for now
1010 1359c2d4 Zdenek Kabelac
        if (get_le16(pb) != 0) {
1011 5acdd6e6 Zdenek Kabelac
            if (!url_feof(pb))
1012
                printf("ff asf bad non zero\n");
1013 2a10020b Zdenek Kabelac
            return -EIO;
1014
        }
1015 de6d9b64 Fabrice Bellard
    }
1016 2a10020b Zdenek Kabelac
1017
    asf->packet_flags = get_byte(pb);
1018
    asf->packet_property = get_byte(pb);
1019
1020
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
1021
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1022
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1023
1024
    asf->packet_timestamp = get_le32(pb);
1025 de6d9b64 Fabrice Bellard
    get_le16(pb); /* duration */
1026 2141dc37 Zdenek Kabelac
    // rsize has at least 11 bytes which have to be present
1027 2a10020b Zdenek Kabelac
1028
    if (asf->packet_flags & 0x01) {
1029
        asf->packet_segsizetype = get_byte(pb); rsize++;
1030
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
1031
    } else {
1032
        asf->packet_segments = 1;
1033
        asf->packet_segsizetype = 0x80;
1034
    }
1035
    asf->packet_size_left = packet_length - padsize - rsize;
1036 acbe6cfa Zdenek Kabelac
    if (packet_length < asf->hdr.min_pktsize)
1037
        padsize += asf->hdr.min_pktsize - packet_length;
1038 2a10020b Zdenek Kabelac
    asf->packet_padsize = padsize;
1039 de6d9b64 Fabrice Bellard
#ifdef DEBUG
1040 2a10020b Zdenek Kabelac
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
1041 de6d9b64 Fabrice Bellard
#endif
1042
    return 0;
1043
}
1044
1045
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1046
{
1047
    ASFContext *asf = s->priv_data;
1048 2a10020b Zdenek Kabelac
    ASFStream *asf_st = 0;
1049 de6d9b64 Fabrice Bellard
    ByteIOContext *pb = &s->pb;
1050 1359c2d4 Zdenek Kabelac
    //static int pc = 0;
1051 2a10020b Zdenek Kabelac
    for (;;) {
1052
        int rsize = 0;
1053 2141dc37 Zdenek Kabelac
        if (asf->packet_size_left < FRAME_HEADER_SIZE
1054 1359c2d4 Zdenek Kabelac
            || asf->packet_segments < 1) {
1055 2a10020b Zdenek Kabelac
            //asf->packet_size_left <= asf->packet_padsize) {
1056 1359c2d4 Zdenek Kabelac
            int ret = asf->packet_size_left + asf->packet_padsize;
1057
            //printf("PacketLeftSize:%d  Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
1058
            /* fail safe */
1059
            url_fskip(pb, ret);
1060 2a10020b Zdenek Kabelac
            ret = asf_get_packet(s);
1061
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
1062 5acdd6e6 Zdenek Kabelac
            if (ret < 0 || url_feof(pb))
1063 2a10020b Zdenek Kabelac
                return -EIO;
1064 2141dc37 Zdenek Kabelac
            asf->packet_time_start = 0;
1065 2a10020b Zdenek Kabelac
            continue;
1066
        }
1067 2141dc37 Zdenek Kabelac
        if (asf->packet_time_start == 0) {
1068 2a10020b Zdenek Kabelac
            /* read frame header */
1069 1359c2d4 Zdenek Kabelac
            int num = get_byte(pb);
1070
            asf->packet_segments--;
1071 2a10020b Zdenek Kabelac
            rsize++;
1072
            asf->packet_key_frame = (num & 0x80) >> 7;
1073
            asf->stream_index = asf->asfid2avid[num & 0x7f];
1074
            // sequence should be ignored!
1075
            DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1076
            DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1077
            DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1078
1079
            if (asf->packet_replic_size > 1) {
1080
                // it should be always at least 8 bytes - FIXME validate
1081
                asf->packet_obj_size = get_le32(pb);
1082
                asf->packet_frag_timestamp = get_le32(pb); // timestamp
1083 acbe6cfa Zdenek Kabelac
                if (asf->packet_replic_size > 8)
1084
                    url_fskip(pb, asf->packet_replic_size - 8);
1085 2a10020b Zdenek Kabelac
                rsize += asf->packet_replic_size; // FIXME - check validity
1086
            } else {
1087 acbe6cfa Zdenek Kabelac
                // multipacket - frag_offset is begining timestamp
1088 2a10020b Zdenek Kabelac
                asf->packet_time_start = asf->packet_frag_offset;
1089
                asf->packet_frag_offset = 0;
1090
                asf->packet_frag_timestamp = asf->packet_timestamp;
1091 2141dc37 Zdenek Kabelac
1092 2a10020b Zdenek Kabelac
                if (asf->packet_replic_size == 1) {
1093
                    asf->packet_time_delta = get_byte(pb);
1094
                    rsize++;
1095
                }
1096
            }
1097
            if (asf->packet_flags & 0x01) {
1098
                DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1099 acbe6cfa Zdenek Kabelac
#undef DO_2BITS
1100 2a10020b Zdenek Kabelac
                //printf("Fragsize %d\n", asf->packet_frag_size);
1101
            } else {
1102
                asf->packet_frag_size = asf->packet_size_left - rsize;
1103
                //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
1104
            }
1105 1359c2d4 Zdenek Kabelac
            if (asf->packet_replic_size == 1) {
1106 2141dc37 Zdenek Kabelac
                asf->packet_multi_size = asf->packet_frag_size;
1107 1359c2d4 Zdenek Kabelac
                if (asf->packet_multi_size > asf->packet_size_left) {
1108 2141dc37 Zdenek Kabelac
                    asf->packet_segments = 0;
1109
                    continue;
1110
                }
1111
            }
1112 2a10020b Zdenek Kabelac
            asf->packet_size_left -= rsize;
1113
            //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1114 1359c2d4 Zdenek Kabelac
1115
            if (asf->stream_index < 0) {
1116
                asf->packet_time_start = 0;
1117
                /* unhandled packet (should not happen) */
1118
                url_fskip(pb, asf->packet_frag_size);
1119
                asf->packet_size_left -= asf->packet_frag_size;
1120
                printf("ff asf skip %d  %d\n", asf->packet_frag_size, num & 0x7f);
1121
                continue;
1122
            }
1123
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
1124 2a10020b Zdenek Kabelac
        }
1125
        asf_st = asf->asf_st;
1126
1127
        if ((asf->packet_frag_offset != asf_st->frag_offset
1128
             || (asf->packet_frag_offset
1129
                 && asf->packet_seq != asf_st->seq)) // seq should be ignored
1130
           ) {
1131
            /* cannot continue current packet: free it */
1132
            // FIXME better check if packet was already allocated
1133 2141dc37 Zdenek Kabelac
            printf("ff asf parser skips: %d - %d     o:%d - %d    %d %d   fl:%d\n",
1134 2a10020b Zdenek Kabelac
                   asf_st->pkt.size,
1135 2141dc37 Zdenek Kabelac
                   asf->packet_obj_size,
1136 2a10020b Zdenek Kabelac
                   asf->packet_frag_offset, asf_st->frag_offset,
1137
                   asf->packet_seq, asf_st->seq, asf->packet_frag_size);
1138 2141dc37 Zdenek Kabelac
            if (asf_st->pkt.size)
1139 2a10020b Zdenek Kabelac
                av_free_packet(&asf_st->pkt);
1140
            asf_st->frag_offset = 0;
1141
            if (asf->packet_frag_offset != 0) {
1142
                url_fskip(pb, asf->packet_frag_size);
1143 2141dc37 Zdenek Kabelac
                printf("ff asf parser skiping %db\n", asf->packet_frag_size);
1144
                asf->packet_size_left -= asf->packet_frag_size;
1145 2a10020b Zdenek Kabelac
                continue;
1146
            }
1147
        }
1148 2141dc37 Zdenek Kabelac
        if (asf->packet_replic_size == 1) {
1149
            // frag_offset is here used as the begining timestamp
1150 2a10020b Zdenek Kabelac
            asf->packet_frag_timestamp = asf->packet_time_start;
1151 2141dc37 Zdenek Kabelac
            asf->packet_time_start += asf->packet_time_delta;
1152 2a10020b Zdenek Kabelac
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
1153 2141dc37 Zdenek Kabelac
            asf->packet_size_left--;
1154
            asf->packet_multi_size--;
1155
            if (asf->packet_multi_size < asf->packet_obj_size)
1156
            {
1157
                asf->packet_time_start = 0;
1158
                url_fskip(pb, asf->packet_multi_size);
1159
                asf->packet_size_left -= asf->packet_multi_size;
1160
                continue;
1161
            }
1162
            asf->packet_multi_size -= asf->packet_obj_size;
1163
            //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);
1164 2a10020b Zdenek Kabelac
        }
1165
        if (asf_st->frag_offset == 0) {
1166
            /* new packet */
1167
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1168
            asf_st->seq = asf->packet_seq;
1169
            asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1170
            asf_st->pkt.stream_index = asf->stream_index;
1171
            if (asf->packet_key_frame)
1172
                asf_st->pkt.flags |= PKT_FLAG_KEY;
1173
        }
1174
1175
        /* read data */
1176
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
1177
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1178
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1179 2141dc37 Zdenek Kabelac
        asf->packet_size_left -= asf->packet_frag_size;
1180
        if (asf->packet_size_left < 0)
1181
            continue;
1182 2a10020b Zdenek Kabelac
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
1183
                   asf->packet_frag_size);
1184
        asf_st->frag_offset += asf->packet_frag_size;
1185
        /* test if whole packet is read */
1186
        if (asf_st->frag_offset == asf_st->pkt.size) {
1187
            /* return packet */
1188
            if (asf_st->ds_span > 1) {
1189 2141dc37 Zdenek Kabelac
                /* packet descrambling */
1190 2a10020b Zdenek Kabelac
                char* newdata = av_malloc(asf_st->pkt.size);
1191
                if (newdata) {
1192
                    int offset = 0;
1193
                    while (offset < asf_st->pkt.size) {
1194
                        int off = offset / asf_st->ds_chunk_size;
1195
                        int row = off / asf_st->ds_span;
1196
                        int col = off % asf_st->ds_span;
1197
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1198
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
1199
                        memcpy(newdata + offset,
1200
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1201
                               asf_st->ds_chunk_size);
1202
                        offset += asf_st->ds_chunk_size;
1203
                    }
1204
                    av_free(asf_st->pkt.data);
1205
                    asf_st->pkt.data = newdata;
1206
                }
1207
            }
1208
            asf_st->frag_offset = 0;
1209
            memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
1210
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1211
            asf_st->pkt.size = 0;
1212
            asf_st->pkt.data = 0;
1213
            break; // packet completed
1214
        }
1215 de6d9b64 Fabrice Bellard
    }
1216
    return 0;
1217
}
1218
1219
static int asf_read_close(AVFormatContext *s)
1220
{
1221
    int i;
1222
1223
    for(i=0;i<s->nb_streams;i++) {
1224 4c3dff6d Zdenek Kabelac
        AVStream *st = s->streams[i];
1225
        av_free(st->priv_data);
1226
        av_free(st->codec.extradata);
1227 de6d9b64 Fabrice Bellard
    }
1228
    return 0;
1229
}
1230
1231 2a10020b Zdenek Kabelac
static int asf_read_seek(AVFormatContext *s, int64_t pts)
1232
{
1233 4cfbf61b Falk Hüffner
    printf("SEEK TO %lld", pts);
1234 2a10020b Zdenek Kabelac
    return -1;
1235
}
1236
1237 0570bf06 Zdenek Kabelac
static AVInputFormat asf_iformat = {
1238 c9a65ca8 Fabrice Bellard
    "asf",
1239
    "asf format",
1240
    sizeof(ASFContext),
1241
    asf_probe,
1242
    asf_read_header,
1243
    asf_read_packet,
1244
    asf_read_close,
1245 2a10020b Zdenek Kabelac
    asf_read_seek,
1246 c9a65ca8 Fabrice Bellard
};
1247
1248 0570bf06 Zdenek Kabelac
static AVOutputFormat asf_oformat = {
1249 de6d9b64 Fabrice Bellard
    "asf",
1250
    "asf format",
1251 c6c11cb6 Ryutaroh Matsumoto
    "video/x-ms-asf",
1252 a56c66a7 Fabrice Bellard
    "asf,wmv",
1253 c9a65ca8 Fabrice Bellard
    sizeof(ASFContext),
1254 4606ac8d Zdenek Kabelac
#ifdef CONFIG_MP3LAME
1255 80783dc2 Fabrice Bellard
    CODEC_ID_MP3,
1256 4606ac8d Zdenek Kabelac
#else
1257 de6d9b64 Fabrice Bellard
    CODEC_ID_MP2,
1258 4606ac8d Zdenek Kabelac
#endif
1259 d7425f59 Michael Niedermayer
    CODEC_ID_MSMPEG4V3,
1260 de6d9b64 Fabrice Bellard
    asf_write_header,
1261
    asf_write_packet,
1262
    asf_write_trailer,
1263
};
1264 c9a65ca8 Fabrice Bellard
1265 0570bf06 Zdenek Kabelac
static AVOutputFormat asf_stream_oformat = {
1266 8b3c13f9 Philip Gladstone
    "asf_stream",
1267
    "asf format",
1268 c6c11cb6 Ryutaroh Matsumoto
    "video/x-ms-asf",
1269 8b3c13f9 Philip Gladstone
    "asf,wmv",
1270
    sizeof(ASFContext),
1271
#ifdef CONFIG_MP3LAME
1272 80783dc2 Fabrice Bellard
    CODEC_ID_MP3,
1273 8b3c13f9 Philip Gladstone
#else
1274
    CODEC_ID_MP2,
1275
#endif
1276 d7425f59 Michael Niedermayer
    CODEC_ID_MSMPEG4V3,
1277 8b3c13f9 Philip Gladstone
    asf_write_stream_header,
1278
    asf_write_packet,
1279
    asf_write_trailer,
1280
};
1281
1282 c9a65ca8 Fabrice Bellard
int asf_init(void)
1283
{
1284
    av_register_input_format(&asf_iformat);
1285
    av_register_output_format(&asf_oformat);
1286 8b3c13f9 Philip Gladstone
    av_register_output_format(&asf_stream_oformat);
1287 c9a65ca8 Fabrice Bellard
    return 0;
1288
}