Statistics
| Branch: | Revision:

ffmpeg / libavformat / rm.c @ 5a757507

History | View | Annotate | Download (26.2 KB)

1 de6d9b64 Fabrice Bellard
/*
2
 * "Real" compatible mux and demux.
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
21
/* in ms */
22
#define BUFFER_DURATION 0 
23
24
typedef struct {
25
    int nb_packets;
26
    int packet_total_size;
27
    int packet_max_size;
28
    /* codec related output */
29
    int bit_rate;
30
    float frame_rate;
31
    int nb_frames;    /* current frame number */
32
    int total_frames; /* total number of frames */
33
    int num;
34
    AVCodecContext *enc;
35
} StreamInfo;
36
37
typedef struct {
38
    StreamInfo streams[2];
39
    StreamInfo *audio_stream, *video_stream;
40
    int data_pos; /* position of the data after the header */
41
    int nb_packets;
42 c9510803 Fabrice Bellard
    int old_format;
43 de6d9b64 Fabrice Bellard
} RMContext;
44
45 764ef400 Mike Melanson
#ifdef CONFIG_ENCODERS
46 de6d9b64 Fabrice Bellard
static void put_str(ByteIOContext *s, const char *tag)
47
{
48
    put_be16(s,strlen(tag));
49
    while (*tag) {
50
        put_byte(s, *tag++);
51
    }
52
}
53
54
static void put_str8(ByteIOContext *s, const char *tag)
55
{
56
    put_byte(s, strlen(tag));
57
    while (*tag) {
58
        put_byte(s, *tag++);
59
    }
60
}
61
62
static void rv10_write_header(AVFormatContext *ctx, 
63
                              int data_size, int index_pos)
64
{
65
    RMContext *rm = ctx->priv_data;
66
    ByteIOContext *s = &ctx->pb;
67
    StreamInfo *stream;
68
    unsigned char *data_offset_ptr, *start_ptr;
69
    const char *desc, *mimetype;
70
    int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
71
    int bit_rate, v, duration, flags, data_pos;
72
73
    start_ptr = s->buf_ptr;
74
75
    put_tag(s, ".RMF");
76
    put_be32(s,18); /* header size */
77
    put_be16(s,0);
78
    put_be32(s,0);
79
    put_be32(s,4 + ctx->nb_streams); /* num headers */
80
81
    put_tag(s,"PROP");
82
    put_be32(s, 50);
83
    put_be16(s, 0);
84
    packet_max_size = 0;
85
    packet_total_size = 0;
86
    nb_packets = 0;
87
    bit_rate = 0;
88
    duration = 0;
89
    for(i=0;i<ctx->nb_streams;i++) {
90
        StreamInfo *stream = &rm->streams[i];
91
        bit_rate += stream->bit_rate;
92
        if (stream->packet_max_size > packet_max_size)
93
            packet_max_size = stream->packet_max_size;
94
        nb_packets += stream->nb_packets;
95
        packet_total_size += stream->packet_total_size;
96
        /* select maximum duration */
97
        v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate);
98
        if (v > duration)
99
            duration = v;
100
    }
101
    put_be32(s, bit_rate); /* max bit rate */
102
    put_be32(s, bit_rate); /* avg bit rate */
103
    put_be32(s, packet_max_size);        /* max packet size */
104
    if (nb_packets > 0)
105
        packet_avg_size = packet_total_size / nb_packets;
106
    else
107
        packet_avg_size = 0;
108
    put_be32(s, packet_avg_size);        /* avg packet size */
109
    put_be32(s, nb_packets);  /* num packets */
110
    put_be32(s, duration); /* duration */
111
    put_be32(s, BUFFER_DURATION);           /* preroll */
112
    put_be32(s, index_pos);           /* index offset */
113
    /* computation of data the data offset */
114
    data_offset_ptr = s->buf_ptr;
115
    put_be32(s, 0);           /* data offset : will be patched after */
116
    put_be16(s, ctx->nb_streams);    /* num streams */
117
    flags = 1 | 2; /* save allowed & perfect play */
118
    if (url_is_streamed(s))
119
        flags |= 4; /* live broadcast */
120
    put_be16(s, flags);
121
    
122
    /* comments */
123
124
    put_tag(s,"CONT");
125
    size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) + 
126
        strlen(ctx->comment) + 4 * 2 + 10;
127
    put_be32(s,size);
128
    put_be16(s,0);
129
    put_str(s, ctx->title);
130
    put_str(s, ctx->author);
131
    put_str(s, ctx->copyright);
132
    put_str(s, ctx->comment);
133
    
134
    for(i=0;i<ctx->nb_streams;i++) {
135
        int codec_data_size;
136
137
        stream = &rm->streams[i];
138
        
139
        if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
140
            desc = "The Audio Stream";
141
            mimetype = "audio/x-pn-realaudio";
142
            codec_data_size = 73;
143
        } else {
144
            desc = "The Video Stream";
145
            mimetype = "video/x-pn-realvideo";
146
            codec_data_size = 34;
147
        }
148
149
        put_tag(s,"MDPR");
150
        size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
151
        put_be32(s, size);
152
        put_be16(s, 0);
153
154
        put_be16(s, i); /* stream number */
155
        put_be32(s, stream->bit_rate); /* max bit rate */
156
        put_be32(s, stream->bit_rate); /* avg bit rate */
157
        put_be32(s, stream->packet_max_size);        /* max packet size */
158
        if (stream->nb_packets > 0)
159
            packet_avg_size = stream->packet_total_size / 
160
                stream->nb_packets;
161
        else
162
            packet_avg_size = 0;
163
        put_be32(s, packet_avg_size);        /* avg packet size */
164
        put_be32(s, 0);           /* start time */
165
        put_be32(s, BUFFER_DURATION);           /* preroll */
166
        /* duration */
167 5d6ef63f Philip Gladstone
        if (url_is_streamed(s) || !stream->total_frames)
168
            put_be32(s, (int)(3600 * 1000));
169
        else
170
            put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
171 de6d9b64 Fabrice Bellard
        put_str8(s, desc);
172
        put_str8(s, mimetype);
173
        put_be32(s, codec_data_size);
174
        
175
        if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
176
            int coded_frame_size, fscode, sample_rate;
177
            sample_rate = stream->enc->sample_rate;
178
            coded_frame_size = (stream->enc->bit_rate * 
179
                                stream->enc->frame_size) / (8 * sample_rate);
180
            /* audio codec info */
181
            put_tag(s, ".ra");
182
            put_byte(s, 0xfd);
183
            put_be32(s, 0x00040000); /* version */
184
            put_tag(s, ".ra4");
185
            put_be32(s, 0x01b53530); /* stream length */
186
            put_be16(s, 4); /* unknown */
187
            put_be32(s, 0x39); /* header size */
188
189
            switch(sample_rate) {
190
            case 48000:
191
            case 24000:
192
            case 12000:
193
                fscode = 1;
194
                break;
195
            default:
196
            case 44100:
197
            case 22050:
198
            case 11025:
199
                fscode = 2;
200
                break;
201
            case 32000:
202
            case 16000:
203
            case 8000:
204
                fscode = 3;
205
            }
206
            put_be16(s, fscode); /* codec additional info, for AC3, seems
207
                                     to be a frequency code */
208
            /* special hack to compensate rounding errors... */
209
            if (coded_frame_size == 557)
210
                coded_frame_size--;
211
            put_be32(s, coded_frame_size); /* frame length */
212
            put_be32(s, 0x51540); /* unknown */
213
            put_be32(s, 0x249f0); /* unknown */
214
            put_be32(s, 0x249f0); /* unknown */
215
            put_be16(s, 0x01);
216
            /* frame length : seems to be very important */
217
            put_be16(s, coded_frame_size); 
218
            put_be32(s, 0); /* unknown */
219
            put_be16(s, stream->enc->sample_rate); /* sample rate */
220
            put_be32(s, 0x10); /* unknown */
221
            put_be16(s, stream->enc->channels);
222
            put_str8(s, "Int0"); /* codec name */
223
            put_str8(s, "dnet"); /* codec name */
224
            put_be16(s, 0); /* title length */
225
            put_be16(s, 0); /* author length */
226
            put_be16(s, 0); /* copyright length */
227
            put_byte(s, 0); /* end of header */
228
        } else {
229
            /* video codec info */
230
            put_be32(s,34); /* size */
231
            put_tag(s,"VIDORV10");
232
            put_be16(s, stream->enc->width);
233
            put_be16(s, stream->enc->height);
234 5d6ef63f Philip Gladstone
            put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */
235 de6d9b64 Fabrice Bellard
            put_be32(s,0);     /* unknown meaning */
236 5d6ef63f Philip Gladstone
            put_be16(s, (int) stream->frame_rate);  /* unknown meaning */
237 de6d9b64 Fabrice Bellard
            put_be32(s,0);     /* unknown meaning */
238
            put_be16(s, 8);    /* unknown meaning */
239
            /* Seems to be the codec version: only use basic H263. The next
240
               versions seems to add a diffential DC coding as in
241
               MPEG... nothing new under the sun */
242
            put_be32(s,0x10000000); 
243
            //put_be32(s,0x10003000); 
244
        }
245
    }
246
247
    /* patch data offset field */
248
    data_pos = s->buf_ptr - start_ptr;
249
    rm->data_pos = data_pos;
250
    data_offset_ptr[0] = data_pos >> 24;
251
    data_offset_ptr[1] = data_pos >> 16;
252
    data_offset_ptr[2] = data_pos >> 8;
253
    data_offset_ptr[3] = data_pos;
254
    
255
    /* data stream */
256
    put_tag(s,"DATA");
257
    put_be32(s,data_size + 10 + 8);
258
    put_be16(s,0);
259
260
    put_be32(s, nb_packets); /* number of packets */
261
    put_be32(s,0); /* next data header */
262
}
263
264
static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream, 
265
                                int length, int key_frame)
266
{
267
    int timestamp;
268
    ByteIOContext *s = &ctx->pb;
269
270
    stream->nb_packets++;
271
    stream->packet_total_size += length;
272
    if (length > stream->packet_max_size)
273
        stream->packet_max_size =  length;
274
275
    put_be16(s,0); /* version */
276
    put_be16(s,length + 12);
277
    put_be16(s, stream->num); /* stream number */
278
    timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate;
279
    put_be32(s, timestamp); /* timestamp */
280
    put_byte(s, 0); /* reserved */
281
    put_byte(s, key_frame ? 2 : 0); /* flags */
282
}
283
284
static int rm_write_header(AVFormatContext *s)
285
{
286 c9a65ca8 Fabrice Bellard
    RMContext *rm = s->priv_data;
287 de6d9b64 Fabrice Bellard
    StreamInfo *stream;
288
    int n;
289
    AVCodecContext *codec;
290
291
    for(n=0;n<s->nb_streams;n++) {
292
        s->streams[n]->id = n;
293
        codec = &s->streams[n]->codec;
294
        stream = &rm->streams[n];
295
        memset(stream, 0, sizeof(StreamInfo));
296
        stream->num = n;
297
        stream->bit_rate = codec->bit_rate;
298
        stream->enc = codec;
299
300
        switch(codec->codec_type) {
301
        case CODEC_TYPE_AUDIO:
302
            rm->audio_stream = stream;
303
            stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size;
304
            /* XXX: dummy values */
305
            stream->packet_max_size = 1024;
306
            stream->nb_packets = 0;
307
            stream->total_frames = stream->nb_packets;
308
            break;
309
        case CODEC_TYPE_VIDEO:
310
            rm->video_stream = stream;
311 14bea432 Michael Niedermayer
            stream->frame_rate = (float)codec->frame_rate / (float)codec->frame_rate_base;
312 de6d9b64 Fabrice Bellard
            /* XXX: dummy values */
313
            stream->packet_max_size = 4096;
314
            stream->nb_packets = 0;
315
            stream->total_frames = stream->nb_packets;
316
            break;
317 5d6ef63f Philip Gladstone
        default:
318 42343f7e Philip Gladstone
            av_abort();
319 de6d9b64 Fabrice Bellard
        }
320
    }
321
322
    rv10_write_header(s, 0, 0);
323
    put_flush_packet(&s->pb);
324
    return 0;
325
}
326
327 49057904 Fabrice Bellard
static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size)
328 de6d9b64 Fabrice Bellard
{
329 0c1a9eda Zdenek Kabelac
    uint8_t *buf1;
330 de6d9b64 Fabrice Bellard
    RMContext *rm = s->priv_data;
331
    ByteIOContext *pb = &s->pb;
332
    StreamInfo *stream = rm->audio_stream;
333
    int i;
334
335 8be1c656 Fabrice Bellard
    /* XXX: suppress this malloc */
336 0c1a9eda Zdenek Kabelac
    buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) );
337 8be1c656 Fabrice Bellard
    
338 492cd3a9 Michael Niedermayer
    write_packet_header(s, stream, size, stream->enc->coded_frame->key_frame);
339 de6d9b64 Fabrice Bellard
    
340
    /* for AC3, the words seems to be reversed */
341
    for(i=0;i<size;i+=2) {
342
        buf1[i] = buf[i+1];
343
        buf1[i+1] = buf[i];
344
    }
345
    put_buffer(pb, buf1, size);
346
    put_flush_packet(pb);
347
    stream->nb_frames++;
348 1ea4f593 Fabrice Bellard
    av_free(buf1);
349 de6d9b64 Fabrice Bellard
    return 0;
350
}
351
352 49057904 Fabrice Bellard
static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size)
353 de6d9b64 Fabrice Bellard
{
354
    RMContext *rm = s->priv_data;
355
    ByteIOContext *pb = &s->pb;
356
    StreamInfo *stream = rm->video_stream;
357 492cd3a9 Michael Niedermayer
    int key_frame = stream->enc->coded_frame->key_frame;
358 5d6ef63f Philip Gladstone
359 de6d9b64 Fabrice Bellard
    /* XXX: this is incorrect: should be a parameter */
360
361
    /* Well, I spent some time finding the meaning of these bits. I am
362
       not sure I understood everything, but it works !! */
363
#if 1
364
    write_packet_header(s, stream, size + 7, key_frame);
365
    /* bit 7: '1' if final packet of a frame converted in several packets */
366
    put_byte(pb, 0x81); 
367
    /* bit 7: '1' if I frame. bits 6..0 : sequence number in current
368
       frame starting from 1 */
369
    if (key_frame) {
370
        put_byte(pb, 0x81); 
371
    } else {
372
        put_byte(pb, 0x01); 
373
    }
374
    put_be16(pb, 0x4000 | (size)); /* total frame size */
375
    put_be16(pb, 0x4000 | (size));              /* offset from the start or the end */
376
#else
377
    /* full frame */
378
    write_packet_header(s, size + 6);
379
    put_byte(pb, 0xc0); 
380
    put_be16(pb, 0x4000 | size); /* total frame size */
381
    put_be16(pb, 0x4000 + packet_number * 126); /* position in stream */
382
#endif
383
    put_byte(pb, stream->nb_frames & 0xff); 
384
    
385
    put_buffer(pb, buf, size);
386
    put_flush_packet(pb);
387
388
    stream->nb_frames++;
389
    return 0;
390
}
391
392
static int rm_write_packet(AVFormatContext *s, int stream_index, 
393 49057904 Fabrice Bellard
                           const uint8_t *buf, int size, int64_t pts)
394 de6d9b64 Fabrice Bellard
{
395
    if (s->streams[stream_index]->codec.codec_type == 
396
        CODEC_TYPE_AUDIO)
397
        return rm_write_audio(s, buf, size);
398
    else
399
        return rm_write_video(s, buf, size);
400
}
401
        
402
static int rm_write_trailer(AVFormatContext *s)
403
{
404
    RMContext *rm = s->priv_data;
405
    int data_size, index_pos, i;
406
    ByteIOContext *pb = &s->pb;
407
408
    if (!url_is_streamed(&s->pb)) {
409
        /* end of file: finish to write header */
410
        index_pos = url_fseek(pb, 0, SEEK_CUR);
411
        data_size = index_pos - rm->data_pos;
412
413
        /* index */
414
        put_tag(pb, "INDX");
415
        put_be32(pb, 10 + 10 * s->nb_streams);
416
        put_be16(pb, 0);
417
        
418
        for(i=0;i<s->nb_streams;i++) {
419
            put_be32(pb, 0); /* zero indices */
420
            put_be16(pb, i); /* stream number */
421
            put_be32(pb, 0); /* next index */
422
        }
423
        /* undocumented end header */
424
        put_be32(pb, 0);
425
        put_be32(pb, 0);
426
        
427
        url_fseek(pb, 0, SEEK_SET);
428
        for(i=0;i<s->nb_streams;i++)
429
            rm->streams[i].total_frames = rm->streams[i].nb_frames;
430
        rv10_write_header(s, data_size, index_pos);
431
    } else {
432
        /* undocumented end header */
433
        put_be32(pb, 0);
434
        put_be32(pb, 0);
435
    }
436
    put_flush_packet(pb);
437
    return 0;
438
}
439 764ef400 Mike Melanson
#endif //CONFIG_ENCODERS
440 de6d9b64 Fabrice Bellard
441
/***************************************************/
442
443
static void get_str(ByteIOContext *pb, char *buf, int buf_size)
444
{
445
    int len, i;
446
    char *q;
447
448
    len = get_be16(pb);
449
    q = buf;
450
    for(i=0;i<len;i++) {
451
        if (i < buf_size - 1)
452
            *q++ = get_byte(pb);
453
    }
454
    *q = '\0';
455
}
456
457
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
458
{
459
    int len, i;
460
    char *q;
461
462
    len = get_byte(pb);
463
    q = buf;
464
    for(i=0;i<len;i++) {
465
        if (i < buf_size - 1)
466
            *q++ = get_byte(pb);
467
    }
468
    *q = '\0';
469
}
470
471 c9510803 Fabrice Bellard
static void rm_read_audio_stream_info(AVFormatContext *s, AVStream *st, 
472
                                      int read_all)
473
{
474
    ByteIOContext *pb = &s->pb;
475
    char buf[128];
476
    uint32_t version;
477
    int i;
478
479
    /* ra type header */
480
    version = get_be32(pb); /* version */
481
    if (((version >> 16) & 0xff) == 3) {
482
        /* very old version */
483
        for(i = 0; i < 14; i++)
484
            get_byte(pb);
485
        get_str8(pb, s->title, sizeof(s->title));
486
        get_str8(pb, s->author, sizeof(s->author));
487
        get_str8(pb, s->copyright, sizeof(s->copyright));
488
        get_str8(pb, s->comment, sizeof(s->comment));
489
        get_byte(pb);
490
        get_str8(pb, buf, sizeof(buf));
491
        st->codec.sample_rate = 8000;
492
        st->codec.channels = 1;
493
        st->codec.codec_type = CODEC_TYPE_AUDIO;
494
        st->codec.codec_id = CODEC_ID_RA_144;
495
    } else {
496
        /* old version (4) */
497
        get_be32(pb); /* .ra4 */
498
        get_be32(pb);
499
        get_be16(pb);
500
        get_be32(pb); /* header size */
501
        get_be16(pb); /* add codec info */
502
        get_be32(pb); /* coded frame size */
503
        get_be32(pb); /* ??? */
504
        get_be32(pb); /* ??? */
505
        get_be32(pb); /* ??? */
506
        get_be16(pb); /* 1 */ 
507
        get_be16(pb); /* coded frame size */
508
        get_be32(pb);
509
        st->codec.sample_rate = get_be16(pb);
510
        get_be32(pb);
511
        st->codec.channels = get_be16(pb);
512
        get_str8(pb, buf, sizeof(buf)); /* desc */
513
        get_str8(pb, buf, sizeof(buf)); /* desc */
514
        st->codec.codec_type = CODEC_TYPE_AUDIO;
515
        if (!strcmp(buf, "dnet")) {
516
            st->codec.codec_id = CODEC_ID_AC3;
517
        } else {
518
            st->codec.codec_id = CODEC_ID_NONE;
519
            pstrcpy(st->codec.codec_name, sizeof(st->codec.codec_name),
520
                    buf);
521
        }
522
        if (read_all) {
523
            get_byte(pb);
524
            get_byte(pb);
525
            get_byte(pb);
526
            
527
            get_str8(pb, s->title, sizeof(s->title));
528
            get_str8(pb, s->author, sizeof(s->author));
529
            get_str8(pb, s->copyright, sizeof(s->copyright));
530
            get_str8(pb, s->comment, sizeof(s->comment));
531
        }
532
    }
533
}
534
535
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
536
{
537
    RMContext *rm = s->priv_data;
538
    AVStream *st;
539
540
    rm->old_format = 1;
541
    st = av_new_stream(s, 0);
542
    if (!st)
543
        goto fail;
544
    rm_read_audio_stream_info(s, st, 1);
545
    return 0;
546
 fail:
547
    return -1;
548
}
549
550 de6d9b64 Fabrice Bellard
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
551
{
552 c9a65ca8 Fabrice Bellard
    RMContext *rm = s->priv_data;
553 de6d9b64 Fabrice Bellard
    AVStream *st;
554
    ByteIOContext *pb = &s->pb;
555
    unsigned int tag, v;
556
    int tag_size, size, codec_data_size, i;
557 0c1a9eda Zdenek Kabelac
    int64_t codec_pos;
558 247eadca Fabrice Bellard
    unsigned int h263_hack_version, start_time, duration;
559 de6d9b64 Fabrice Bellard
    char buf[128];
560 5d6ef63f Philip Gladstone
    int flags = 0;
561 de6d9b64 Fabrice Bellard
562 c9510803 Fabrice Bellard
    tag = get_le32(pb);
563
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
564
        /* very old .ra format */
565
        return rm_read_header_old(s, ap);
566
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
567 de6d9b64 Fabrice Bellard
        return -EIO;
568 c9510803 Fabrice Bellard
    }
569 de6d9b64 Fabrice Bellard
570
    get_be32(pb); /* header size */
571
    get_be16(pb);
572
    get_be32(pb);
573
    get_be32(pb); /* number of headers */
574
    
575
    for(;;) {
576
        if (url_feof(pb))
577
            goto fail;
578
        tag = get_le32(pb);
579
        tag_size = get_be32(pb);
580
        get_be16(pb);
581
#if 0
582
        printf("tag=%c%c%c%c (%08x) size=%d\n", 
583
               (tag) & 0xff,
584
               (tag >> 8) & 0xff,
585
               (tag >> 16) & 0xff,
586
               (tag >> 24) & 0xff,
587
               tag,
588
               tag_size);
589
#endif
590
        if (tag_size < 10)
591
            goto fail;
592
        switch(tag) {
593
        case MKTAG('P', 'R', 'O', 'P'):
594
            /* file header */
595
            get_be32(pb); /* max bit rate */
596
            get_be32(pb); /* avg bit rate */
597
            get_be32(pb); /* max packet size */
598
            get_be32(pb); /* avg packet size */
599
            get_be32(pb); /* nb packets */
600
            get_be32(pb); /* duration */
601
            get_be32(pb); /* preroll */
602
            get_be32(pb); /* index offset */
603
            get_be32(pb); /* data offset */
604
            get_be16(pb); /* nb streams */
605 5d6ef63f Philip Gladstone
            flags = get_be16(pb); /* flags */
606 de6d9b64 Fabrice Bellard
            break;
607
        case MKTAG('C', 'O', 'N', 'T'):
608
            get_str(pb, s->title, sizeof(s->title));
609
            get_str(pb, s->author, sizeof(s->author));
610
            get_str(pb, s->copyright, sizeof(s->copyright));
611
            get_str(pb, s->comment, sizeof(s->comment));
612
            break;
613
        case MKTAG('M', 'D', 'P', 'R'):
614 247eadca Fabrice Bellard
            st = av_new_stream(s, 0);
615 de6d9b64 Fabrice Bellard
            if (!st)
616
                goto fail;
617
            st->id = get_be16(pb);
618
            get_be32(pb); /* max bit rate */
619
            st->codec.bit_rate = get_be32(pb); /* bit rate */
620
            get_be32(pb); /* max packet size */
621
            get_be32(pb); /* avg packet size */
622 247eadca Fabrice Bellard
            start_time = get_be32(pb); /* start time */
623 de6d9b64 Fabrice Bellard
            get_be32(pb); /* preroll */
624 247eadca Fabrice Bellard
            duration = get_be32(pb); /* duration */
625
            st->start_time = start_time * (AV_TIME_BASE / 1000);
626
            st->duration = duration * (AV_TIME_BASE / 1000);
627 de6d9b64 Fabrice Bellard
            get_str8(pb, buf, sizeof(buf)); /* desc */
628
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
629
            codec_data_size = get_be32(pb);
630
            codec_pos = url_ftell(pb);
631
632
            v = get_be32(pb);
633
            if (v == MKTAG(0xfd, 'a', 'r', '.')) {
634
                /* ra type header */
635 c9510803 Fabrice Bellard
                rm_read_audio_stream_info(s, st, 0);
636 de6d9b64 Fabrice Bellard
            } else {
637
                if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
638
                fail1:
639 bc874dae Michel Bardiaux
                    av_log(&st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
640 de6d9b64 Fabrice Bellard
                    goto fail;
641
                }
642
                st->codec.codec_tag = get_le32(pb);
643
                if (st->codec.codec_tag != MKTAG('R', 'V', '1', '0'))
644
                    goto fail1;
645
                st->codec.width = get_be16(pb);
646
                st->codec.height = get_be16(pb);
647 14bea432 Michael Niedermayer
                st->codec.frame_rate_base= 1;
648
                st->codec.frame_rate = get_be16(pb) * st->codec.frame_rate_base;
649 de6d9b64 Fabrice Bellard
                st->codec.codec_type = CODEC_TYPE_VIDEO;
650
                get_be32(pb);
651
                get_be16(pb);
652
                get_be32(pb);
653
                get_be16(pb);
654
                /* modification of h263 codec version (!) */
655
                h263_hack_version = get_be32(pb);
656
                switch(h263_hack_version) {
657
                case 0x10000000:
658
                case 0x10003000:
659
                case 0x10003001:
660 144f0625 Michael Niedermayer
                    st->codec.sub_id = h263_hack_version;
661 de6d9b64 Fabrice Bellard
                    st->codec.codec_id = CODEC_ID_RV10;
662
                    break;
663
                default:
664
                    /* not handled */
665
                    st->codec.codec_id = CODEC_ID_NONE;
666
                    break;
667
                }
668
            }
669
            /* skip codec info */
670
            size = url_ftell(pb) - codec_pos;
671
            url_fskip(pb, codec_data_size - size);
672
            break;
673
        case MKTAG('D', 'A', 'T', 'A'):
674
            goto header_end;
675
        default:
676
            /* unknown tag: skip it */
677
            url_fskip(pb, tag_size - 10);
678
            break;
679
        }
680
    }
681
 header_end:
682
    rm->nb_packets = get_be32(pb); /* number of packets */
683 5d6ef63f Philip Gladstone
    if (!rm->nb_packets && (flags & 4))
684
        rm->nb_packets = 3600 * 25;
685 de6d9b64 Fabrice Bellard
    get_be32(pb); /* next data header */
686
    return 0;
687
688
 fail:
689
    for(i=0;i<s->nb_streams;i++) {
690 1ea4f593 Fabrice Bellard
        av_free(s->streams[i]);
691 de6d9b64 Fabrice Bellard
    }
692
    return -EIO;
693
}
694
695 4c2bc159 Michael Niedermayer
static int get_num(ByteIOContext *pb, int *len)
696
{
697
    int n, n1;
698
699
    n = get_be16(pb);
700
    (*len)-=2;
701
    if (n >= 0x4000) {
702
        return n - 0x4000;
703
    } else {
704
        n1 = get_be16(pb);
705
        (*len)-=2;
706
        return (n << 16) | n1;
707
    }
708
}
709
710 c9510803 Fabrice Bellard
/* multiple of 20 bytes for ra144 (ugly) */
711
#define RAW_PACKET_SIZE 1000
712
713 de6d9b64 Fabrice Bellard
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
714
{
715
    RMContext *rm = s->priv_data;
716
    ByteIOContext *pb = &s->pb;
717
    AVStream *st;
718
    int len, num, timestamp, i, tmp, j;
719 0c1a9eda Zdenek Kabelac
    uint8_t *ptr;
720 5d6ef63f Philip Gladstone
    int flags;
721 de6d9b64 Fabrice Bellard
722 c9510803 Fabrice Bellard
    if (rm->old_format) {
723
        /* just read raw bytes */
724
        len = RAW_PACKET_SIZE;
725
        av_new_packet(pkt, len);
726
        pkt->stream_index = 0;
727
        len = get_buffer(pb, pkt->data, len);
728
        if (len <= 0) {
729
            av_free_packet(pkt);
730
            return -EIO;
731 4c2bc159 Michael Niedermayer
        }
732 c9510803 Fabrice Bellard
        pkt->size = len;
733
        st = s->streams[0];
734
    } else {
735
    redo:
736
        if (rm->nb_packets == 0)
737
            return -EIO;
738
        get_be16(pb);
739
        len = get_be16(pb);
740
        if (len < 12)
741
            return -EIO;
742
        num = get_be16(pb);
743
        timestamp = get_be32(pb);
744
        get_byte(pb); /* reserved */
745
        flags = get_byte(pb); /* flags */
746
        rm->nb_packets--;
747
        len -= 12;
748
        
749
        st = NULL;
750
        for(i=0;i<s->nb_streams;i++) {
751
            st = s->streams[i];
752
            if (num == st->id)
753
                break;
754
        }
755
        if (i == s->nb_streams) {
756
            /* skip packet if unknown number */
757
            url_fskip(pb, len);
758
            goto redo;
759
        }
760
        
761
        if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
762
            int full_frame, h, pic_num;
763
            
764
            h= get_byte(pb);
765
            if ((h & 0xc0) == 0xc0) {
766
                int len2, pos;
767
                full_frame = 1;
768
                len2= get_num(pb, &len);
769
                pos = get_num(pb, &len);
770
                //printf("pos:%d\n",len);
771
                len -= 2;
772
            } else {
773
                int seq, frame_size, pos;
774
                full_frame = 0;
775
                seq = get_byte(pb);
776
                frame_size = get_num(pb, &len);
777
                pos = get_num(pb, &len);
778
                //printf("seq:%d, size:%d, pos:%d\n",seq,frame_size,pos);
779
                len -= 3;
780
            }
781
            /* picture number */
782
            pic_num= get_byte(pb);
783
            
784
            //XXX/FIXME/HACK, demuxer should be fixed to send complete frames ...
785
            if(st->codec.slice_offset==NULL) 
786
                st->codec.slice_offset= (int*)av_malloc(sizeof(int));
787
            st->codec.slice_count= full_frame; 
788
            st->codec.slice_offset[0]= 0;
789
        }
790
        
791
        av_new_packet(pkt, len);
792
        pkt->stream_index = i;
793
        get_buffer(pb, pkt->data, len);
794 5d6ef63f Philip Gladstone
    }
795
796 de6d9b64 Fabrice Bellard
    /* for AC3, needs to swap bytes */
797
    if (st->codec.codec_id == CODEC_ID_AC3) {
798
        ptr = pkt->data;
799
        for(j=0;j<len;j+=2) {
800
            tmp = ptr[0];
801
            ptr[0] = ptr[1];
802
            ptr[1] = tmp;
803
                ptr += 2;
804
        }
805
    }
806
    return 0;
807
}
808
809
static int rm_read_close(AVFormatContext *s)
810
{
811
    return 0;
812
}
813
814 c9a65ca8 Fabrice Bellard
static int rm_probe(AVProbeData *p)
815
{
816
    /* check file header */
817
    if (p->buf_size <= 32)
818
        return 0;
819 c9510803 Fabrice Bellard
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
820
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
821
         p->buf[4] == 0 && p->buf[5] == 0) ||
822
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
823
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
824 c9a65ca8 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
825
    else
826
        return 0;
827
}
828
829 c18a2692 Zdenek Kabelac
static AVInputFormat rm_iformat = {
830 c9a65ca8 Fabrice Bellard
    "rm",
831
    "rm format",
832
    sizeof(RMContext),
833
    rm_probe,
834
    rm_read_header,
835
    rm_read_packet,
836
    rm_read_close,
837
};
838
839 764ef400 Mike Melanson
#ifdef CONFIG_ENCODERS
840 c18a2692 Zdenek Kabelac
static AVOutputFormat rm_oformat = {
841 de6d9b64 Fabrice Bellard
    "rm",
842
    "rm format",
843 c6c11cb6 Ryutaroh Matsumoto
    "application/vnd.rn-realmedia",
844 de6d9b64 Fabrice Bellard
    "rm,ra",
845 c9a65ca8 Fabrice Bellard
    sizeof(RMContext),
846 de6d9b64 Fabrice Bellard
    CODEC_ID_AC3,
847
    CODEC_ID_RV10,
848
    rm_write_header,
849
    rm_write_packet,
850
    rm_write_trailer,
851
};
852 764ef400 Mike Melanson
#endif //CONFIG_ENCODERS
853 c9a65ca8 Fabrice Bellard
854
int rm_init(void)
855
{
856
    av_register_input_format(&rm_iformat);
857 764ef400 Mike Melanson
#ifdef CONFIG_ENCODERS
858 c9a65ca8 Fabrice Bellard
    av_register_output_format(&rm_oformat);
859 764ef400 Mike Melanson
#endif //CONFIG_ENCODERS
860 c9a65ca8 Fabrice Bellard
    return 0;
861
}