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ffmpeg / libavformat / rm.c @ 756fb7fe

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1
/*
2
 * "Real" compatible muxer and demuxer.
3
 * Copyright (c) 2000, 2001 Fabrice Bellard.
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21
#include "avformat.h"
22

    
23
/* in ms */
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#define BUFFER_DURATION 0
25

    
26
typedef struct {
27
    int nb_packets;
28
    int packet_total_size;
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    int packet_max_size;
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    /* codec related output */
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    int bit_rate;
32
    float frame_rate;
33
    int nb_frames;    /* current frame number */
34
    int total_frames; /* total number of frames */
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    int num;
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    AVCodecContext *enc;
37
} StreamInfo;
38

    
39
typedef struct {
40
    StreamInfo streams[2];
41
    StreamInfo *audio_stream, *video_stream;
42
    int data_pos; /* position of the data after the header */
43
    int nb_packets;
44
    int old_format;
45
    int current_stream;
46
    int remaining_len;
47
    /// Audio descrambling matrix parameters
48
    uint8_t *audiobuf; ///< place to store reordered audio data
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    int64_t audiotimestamp; ///< Audio packet timestamp
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    int sub_packet_cnt; // Subpacket counter, used while reading
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    int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
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    int audio_stream_num; ///< Stream number for audio packets
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    int audio_pkt_cnt; ///< Output packet counter
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    int audio_framesize; /// Audio frame size from container
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    int sub_packet_lengths[16]; /// Length of each aac subpacket
56
} RMContext;
57

    
58
#ifdef CONFIG_MUXERS
59
static void put_str(ByteIOContext *s, const char *tag)
60
{
61
    put_be16(s,strlen(tag));
62
    while (*tag) {
63
        put_byte(s, *tag++);
64
    }
65
}
66

    
67
static void put_str8(ByteIOContext *s, const char *tag)
68
{
69
    put_byte(s, strlen(tag));
70
    while (*tag) {
71
        put_byte(s, *tag++);
72
    }
73
}
74

    
75
static void rv10_write_header(AVFormatContext *ctx,
76
                              int data_size, int index_pos)
77
{
78
    RMContext *rm = ctx->priv_data;
79
    ByteIOContext *s = &ctx->pb;
80
    StreamInfo *stream;
81
    unsigned char *data_offset_ptr, *start_ptr;
82
    const char *desc, *mimetype;
83
    int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
84
    int bit_rate, v, duration, flags, data_pos;
85

    
86
    start_ptr = s->buf_ptr;
87

    
88
    put_tag(s, ".RMF");
89
    put_be32(s,18); /* header size */
90
    put_be16(s,0);
91
    put_be32(s,0);
92
    put_be32(s,4 + ctx->nb_streams); /* num headers */
93

    
94
    put_tag(s,"PROP");
95
    put_be32(s, 50);
96
    put_be16(s, 0);
97
    packet_max_size = 0;
98
    packet_total_size = 0;
99
    nb_packets = 0;
100
    bit_rate = 0;
101
    duration = 0;
102
    for(i=0;i<ctx->nb_streams;i++) {
103
        StreamInfo *stream = &rm->streams[i];
104
        bit_rate += stream->bit_rate;
105
        if (stream->packet_max_size > packet_max_size)
106
            packet_max_size = stream->packet_max_size;
107
        nb_packets += stream->nb_packets;
108
        packet_total_size += stream->packet_total_size;
109
        /* select maximum duration */
110
        v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate);
111
        if (v > duration)
112
            duration = v;
113
    }
114
    put_be32(s, bit_rate); /* max bit rate */
115
    put_be32(s, bit_rate); /* avg bit rate */
116
    put_be32(s, packet_max_size);        /* max packet size */
117
    if (nb_packets > 0)
118
        packet_avg_size = packet_total_size / nb_packets;
119
    else
120
        packet_avg_size = 0;
121
    put_be32(s, packet_avg_size);        /* avg packet size */
122
    put_be32(s, nb_packets);  /* num packets */
123
    put_be32(s, duration); /* duration */
124
    put_be32(s, BUFFER_DURATION);           /* preroll */
125
    put_be32(s, index_pos);           /* index offset */
126
    /* computation of data the data offset */
127
    data_offset_ptr = s->buf_ptr;
128
    put_be32(s, 0);           /* data offset : will be patched after */
129
    put_be16(s, ctx->nb_streams);    /* num streams */
130
    flags = 1 | 2; /* save allowed & perfect play */
131
    if (url_is_streamed(s))
132
        flags |= 4; /* live broadcast */
133
    put_be16(s, flags);
134

    
135
    /* comments */
136

    
137
    put_tag(s,"CONT");
138
    size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) +
139
        strlen(ctx->comment) + 4 * 2 + 10;
140
    put_be32(s,size);
141
    put_be16(s,0);
142
    put_str(s, ctx->title);
143
    put_str(s, ctx->author);
144
    put_str(s, ctx->copyright);
145
    put_str(s, ctx->comment);
146

    
147
    for(i=0;i<ctx->nb_streams;i++) {
148
        int codec_data_size;
149

    
150
        stream = &rm->streams[i];
151

    
152
        if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
153
            desc = "The Audio Stream";
154
            mimetype = "audio/x-pn-realaudio";
155
            codec_data_size = 73;
156
        } else {
157
            desc = "The Video Stream";
158
            mimetype = "video/x-pn-realvideo";
159
            codec_data_size = 34;
160
        }
161

    
162
        put_tag(s,"MDPR");
163
        size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
164
        put_be32(s, size);
165
        put_be16(s, 0);
166

    
167
        put_be16(s, i); /* stream number */
168
        put_be32(s, stream->bit_rate); /* max bit rate */
169
        put_be32(s, stream->bit_rate); /* avg bit rate */
170
        put_be32(s, stream->packet_max_size);        /* max packet size */
171
        if (stream->nb_packets > 0)
172
            packet_avg_size = stream->packet_total_size /
173
                stream->nb_packets;
174
        else
175
            packet_avg_size = 0;
176
        put_be32(s, packet_avg_size);        /* avg packet size */
177
        put_be32(s, 0);           /* start time */
178
        put_be32(s, BUFFER_DURATION);           /* preroll */
179
        /* duration */
180
        if (url_is_streamed(s) || !stream->total_frames)
181
            put_be32(s, (int)(3600 * 1000));
182
        else
183
            put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
184
        put_str8(s, desc);
185
        put_str8(s, mimetype);
186
        put_be32(s, codec_data_size);
187

    
188
        if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
189
            int coded_frame_size, fscode, sample_rate;
190
            sample_rate = stream->enc->sample_rate;
191
            coded_frame_size = (stream->enc->bit_rate *
192
                                stream->enc->frame_size) / (8 * sample_rate);
193
            /* audio codec info */
194
            put_tag(s, ".ra");
195
            put_byte(s, 0xfd);
196
            put_be32(s, 0x00040000); /* version */
197
            put_tag(s, ".ra4");
198
            put_be32(s, 0x01b53530); /* stream length */
199
            put_be16(s, 4); /* unknown */
200
            put_be32(s, 0x39); /* header size */
201

    
202
            switch(sample_rate) {
203
            case 48000:
204
            case 24000:
205
            case 12000:
206
                fscode = 1;
207
                break;
208
            default:
209
            case 44100:
210
            case 22050:
211
            case 11025:
212
                fscode = 2;
213
                break;
214
            case 32000:
215
            case 16000:
216
            case 8000:
217
                fscode = 3;
218
            }
219
            put_be16(s, fscode); /* codec additional info, for AC3, seems
220
                                     to be a frequency code */
221
            /* special hack to compensate rounding errors... */
222
            if (coded_frame_size == 557)
223
                coded_frame_size--;
224
            put_be32(s, coded_frame_size); /* frame length */
225
            put_be32(s, 0x51540); /* unknown */
226
            put_be32(s, 0x249f0); /* unknown */
227
            put_be32(s, 0x249f0); /* unknown */
228
            put_be16(s, 0x01);
229
            /* frame length : seems to be very important */
230
            put_be16(s, coded_frame_size);
231
            put_be32(s, 0); /* unknown */
232
            put_be16(s, stream->enc->sample_rate); /* sample rate */
233
            put_be32(s, 0x10); /* unknown */
234
            put_be16(s, stream->enc->channels);
235
            put_str8(s, "Int0"); /* codec name */
236
            put_str8(s, "dnet"); /* codec name */
237
            put_be16(s, 0); /* title length */
238
            put_be16(s, 0); /* author length */
239
            put_be16(s, 0); /* copyright length */
240
            put_byte(s, 0); /* end of header */
241
        } else {
242
            /* video codec info */
243
            put_be32(s,34); /* size */
244
            if(stream->enc->codec_id == CODEC_ID_RV10)
245
                put_tag(s,"VIDORV10");
246
            else
247
                put_tag(s,"VIDORV20");
248
            put_be16(s, stream->enc->width);
249
            put_be16(s, stream->enc->height);
250
            put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */
251
            put_be32(s,0);     /* unknown meaning */
252
            put_be16(s, (int) stream->frame_rate);  /* unknown meaning */
253
            put_be32(s,0);     /* unknown meaning */
254
            put_be16(s, 8);    /* unknown meaning */
255
            /* Seems to be the codec version: only use basic H263. The next
256
               versions seems to add a diffential DC coding as in
257
               MPEG... nothing new under the sun */
258
            if(stream->enc->codec_id == CODEC_ID_RV10)
259
                put_be32(s,0x10000000);
260
            else
261
                put_be32(s,0x20103001);
262
            //put_be32(s,0x10003000);
263
        }
264
    }
265

    
266
    /* patch data offset field */
267
    data_pos = s->buf_ptr - start_ptr;
268
    rm->data_pos = data_pos;
269
    data_offset_ptr[0] = data_pos >> 24;
270
    data_offset_ptr[1] = data_pos >> 16;
271
    data_offset_ptr[2] = data_pos >> 8;
272
    data_offset_ptr[3] = data_pos;
273

    
274
    /* data stream */
275
    put_tag(s,"DATA");
276
    put_be32(s,data_size + 10 + 8);
277
    put_be16(s,0);
278

    
279
    put_be32(s, nb_packets); /* number of packets */
280
    put_be32(s,0); /* next data header */
281
}
282

    
283
static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream,
284
                                int length, int key_frame)
285
{
286
    int timestamp;
287
    ByteIOContext *s = &ctx->pb;
288

    
289
    stream->nb_packets++;
290
    stream->packet_total_size += length;
291
    if (length > stream->packet_max_size)
292
        stream->packet_max_size =  length;
293

    
294
    put_be16(s,0); /* version */
295
    put_be16(s,length + 12);
296
    put_be16(s, stream->num); /* stream number */
297
    timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate;
298
    put_be32(s, timestamp); /* timestamp */
299
    put_byte(s, 0); /* reserved */
300
    put_byte(s, key_frame ? 2 : 0); /* flags */
301
}
302

    
303
static int rm_write_header(AVFormatContext *s)
304
{
305
    RMContext *rm = s->priv_data;
306
    StreamInfo *stream;
307
    int n;
308
    AVCodecContext *codec;
309

    
310
    for(n=0;n<s->nb_streams;n++) {
311
        s->streams[n]->id = n;
312
        codec = s->streams[n]->codec;
313
        stream = &rm->streams[n];
314
        memset(stream, 0, sizeof(StreamInfo));
315
        stream->num = n;
316
        stream->bit_rate = codec->bit_rate;
317
        stream->enc = codec;
318

    
319
        switch(codec->codec_type) {
320
        case CODEC_TYPE_AUDIO:
321
            rm->audio_stream = stream;
322
            stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size;
323
            /* XXX: dummy values */
324
            stream->packet_max_size = 1024;
325
            stream->nb_packets = 0;
326
            stream->total_frames = stream->nb_packets;
327
            break;
328
        case CODEC_TYPE_VIDEO:
329
            rm->video_stream = stream;
330
            stream->frame_rate = (float)codec->time_base.den / (float)codec->time_base.num;
331
            /* XXX: dummy values */
332
            stream->packet_max_size = 4096;
333
            stream->nb_packets = 0;
334
            stream->total_frames = stream->nb_packets;
335
            break;
336
        default:
337
            return -1;
338
        }
339
    }
340

    
341
    rv10_write_header(s, 0, 0);
342
    put_flush_packet(&s->pb);
343
    return 0;
344
}
345

    
346
static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags)
347
{
348
    uint8_t *buf1;
349
    RMContext *rm = s->priv_data;
350
    ByteIOContext *pb = &s->pb;
351
    StreamInfo *stream = rm->audio_stream;
352
    int i;
353

    
354
    /* XXX: suppress this malloc */
355
    buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) );
356

    
357
    write_packet_header(s, stream, size, !!(flags & PKT_FLAG_KEY));
358

    
359
    /* for AC3, the words seems to be reversed */
360
    for(i=0;i<size;i+=2) {
361
        buf1[i] = buf[i+1];
362
        buf1[i+1] = buf[i];
363
    }
364
    put_buffer(pb, buf1, size);
365
    put_flush_packet(pb);
366
    stream->nb_frames++;
367
    av_free(buf1);
368
    return 0;
369
}
370

    
371
static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags)
372
{
373
    RMContext *rm = s->priv_data;
374
    ByteIOContext *pb = &s->pb;
375
    StreamInfo *stream = rm->video_stream;
376
    int key_frame = !!(flags & PKT_FLAG_KEY);
377

    
378
    /* XXX: this is incorrect: should be a parameter */
379

    
380
    /* Well, I spent some time finding the meaning of these bits. I am
381
       not sure I understood everything, but it works !! */
382
#if 1
383
    write_packet_header(s, stream, size + 7, key_frame);
384
    /* bit 7: '1' if final packet of a frame converted in several packets */
385
    put_byte(pb, 0x81);
386
    /* bit 7: '1' if I frame. bits 6..0 : sequence number in current
387
       frame starting from 1 */
388
    if (key_frame) {
389
        put_byte(pb, 0x81);
390
    } else {
391
        put_byte(pb, 0x01);
392
    }
393
    put_be16(pb, 0x4000 + (size)); /* total frame size */
394
    put_be16(pb, 0x4000 + (size));              /* offset from the start or the end */
395
#else
396
    /* full frame */
397
    write_packet_header(s, size + 6);
398
    put_byte(pb, 0xc0);
399
    put_be16(pb, 0x4000 + size); /* total frame size */
400
    put_be16(pb, 0x4000 + packet_number * 126); /* position in stream */
401
#endif
402
    put_byte(pb, stream->nb_frames & 0xff);
403

    
404
    put_buffer(pb, buf, size);
405
    put_flush_packet(pb);
406

    
407
    stream->nb_frames++;
408
    return 0;
409
}
410

    
411
static int rm_write_packet(AVFormatContext *s, AVPacket *pkt)
412
{
413
    if (s->streams[pkt->stream_index]->codec->codec_type ==
414
        CODEC_TYPE_AUDIO)
415
        return rm_write_audio(s, pkt->data, pkt->size, pkt->flags);
416
    else
417
        return rm_write_video(s, pkt->data, pkt->size, pkt->flags);
418
}
419

    
420
static int rm_write_trailer(AVFormatContext *s)
421
{
422
    RMContext *rm = s->priv_data;
423
    int data_size, index_pos, i;
424
    ByteIOContext *pb = &s->pb;
425

    
426
    if (!url_is_streamed(&s->pb)) {
427
        /* end of file: finish to write header */
428
        index_pos = url_fseek(pb, 0, SEEK_CUR);
429
        data_size = index_pos - rm->data_pos;
430

    
431
        /* index */
432
        put_tag(pb, "INDX");
433
        put_be32(pb, 10 + 10 * s->nb_streams);
434
        put_be16(pb, 0);
435

    
436
        for(i=0;i<s->nb_streams;i++) {
437
            put_be32(pb, 0); /* zero indices */
438
            put_be16(pb, i); /* stream number */
439
            put_be32(pb, 0); /* next index */
440
        }
441
        /* undocumented end header */
442
        put_be32(pb, 0);
443
        put_be32(pb, 0);
444

    
445
        url_fseek(pb, 0, SEEK_SET);
446
        for(i=0;i<s->nb_streams;i++)
447
            rm->streams[i].total_frames = rm->streams[i].nb_frames;
448
        rv10_write_header(s, data_size, index_pos);
449
    } else {
450
        /* undocumented end header */
451
        put_be32(pb, 0);
452
        put_be32(pb, 0);
453
    }
454
    put_flush_packet(pb);
455
    return 0;
456
}
457
#endif //CONFIG_MUXERS
458

    
459
/***************************************************/
460

    
461
static void get_str(ByteIOContext *pb, char *buf, int buf_size)
462
{
463
    int len, i;
464
    char *q;
465

    
466
    len = get_be16(pb);
467
    q = buf;
468
    for(i=0;i<len;i++) {
469
        if (i < buf_size - 1)
470
            *q++ = get_byte(pb);
471
    }
472
    *q = '\0';
473
}
474

    
475
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
476
{
477
    int len, i;
478
    char *q;
479

    
480
    len = get_byte(pb);
481
    q = buf;
482
    for(i=0;i<len;i++) {
483
        if (i < buf_size - 1)
484
            *q++ = get_byte(pb);
485
    }
486
    *q = '\0';
487
}
488

    
489
static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
490
                                      int read_all)
491
{
492
    RMContext *rm = s->priv_data;
493
    ByteIOContext *pb = &s->pb;
494
    char buf[256];
495
    uint32_t version;
496
    int i;
497

    
498
    /* ra type header */
499
    version = get_be32(pb); /* version */
500
    if (((version >> 16) & 0xff) == 3) {
501
        int64_t startpos = url_ftell(pb);
502
        /* very old version */
503
        for(i = 0; i < 14; i++)
504
            get_byte(pb);
505
        get_str8(pb, s->title, sizeof(s->title));
506
        get_str8(pb, s->author, sizeof(s->author));
507
        get_str8(pb, s->copyright, sizeof(s->copyright));
508
        get_str8(pb, s->comment, sizeof(s->comment));
509
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
510
        // fourcc (should always be "lpcJ")
511
        get_byte(pb);
512
        get_str8(pb, buf, sizeof(buf));
513
        }
514
        // Skip extra header crap (this should never happen)
515
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
516
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
517
        st->codec->sample_rate = 8000;
518
        st->codec->channels = 1;
519
        st->codec->codec_type = CODEC_TYPE_AUDIO;
520
        st->codec->codec_id = CODEC_ID_RA_144;
521
    } else {
522
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
523
        /* old version (4) */
524
        get_be32(pb); /* .ra4 */
525
        get_be32(pb); /* data size */
526
        get_be16(pb); /* version2 */
527
        get_be32(pb); /* header size */
528
        flavor= get_be16(pb); /* add codec info / flavor */
529
        rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
530
        get_be32(pb); /* ??? */
531
        get_be32(pb); /* ??? */
532
        get_be32(pb); /* ??? */
533
        rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
534
        st->codec->block_align= get_be16(pb); /* frame size */
535
        rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
536
        get_be16(pb); /* ??? */
537
        if (((version >> 16) & 0xff) == 5) {
538
            get_be16(pb); get_be16(pb); get_be16(pb); }
539
        st->codec->sample_rate = get_be16(pb);
540
        get_be32(pb);
541
        st->codec->channels = get_be16(pb);
542
        if (((version >> 16) & 0xff) == 5) {
543
            get_be32(pb);
544
            buf[0] = get_byte(pb);
545
            buf[1] = get_byte(pb);
546
            buf[2] = get_byte(pb);
547
            buf[3] = get_byte(pb);
548
            buf[4] = 0;
549
        } else {
550
            get_str8(pb, buf, sizeof(buf)); /* desc */
551
            get_str8(pb, buf, sizeof(buf)); /* desc */
552
        }
553
        st->codec->codec_type = CODEC_TYPE_AUDIO;
554
        if (!strcmp(buf, "dnet")) {
555
            st->codec->codec_id = CODEC_ID_AC3;
556
        } else if (!strcmp(buf, "28_8")) {
557
            st->codec->codec_id = CODEC_ID_RA_288;
558
            st->codec->extradata_size= 0;
559
            rm->audio_framesize = st->codec->block_align;
560
            st->codec->block_align = coded_framesize;
561

    
562
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
563
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
564
                return -1;
565
            }
566

    
567
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
568
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
569
            int codecdata_length, i;
570
            get_be16(pb); get_byte(pb);
571
            if (((version >> 16) & 0xff) == 5)
572
                get_byte(pb);
573
            codecdata_length = get_be32(pb);
574
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
575
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
576
                return -1;
577
            }
578

    
579
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
580
            else st->codec->codec_id = CODEC_ID_ATRAC3;
581
            st->codec->extradata_size= codecdata_length;
582
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
583
            for(i = 0; i < codecdata_length; i++)
584
                ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
585
            rm->audio_framesize = st->codec->block_align;
586
            st->codec->block_align = rm->sub_packet_size;
587

    
588
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
589
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
590
                return -1;
591
            }
592

    
593
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
594
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
595
            int codecdata_length, i;
596
            get_be16(pb); get_byte(pb);
597
            if (((version >> 16) & 0xff) == 5)
598
                get_byte(pb);
599
            st->codec->codec_id = CODEC_ID_AAC;
600
            codecdata_length = get_be32(pb);
601
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
602
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
603
                return -1;
604
            }
605
            if (codecdata_length >= 1) {
606
                st->codec->extradata_size = codecdata_length - 1;
607
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
608
                get_byte(pb);
609
                for(i = 0; i < st->codec->extradata_size; i++)
610
                    ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
611
            }
612
        } else {
613
            st->codec->codec_id = CODEC_ID_NONE;
614
            pstrcpy(st->codec->codec_name, sizeof(st->codec->codec_name),
615
                    buf);
616
        }
617
        if (read_all) {
618
            get_byte(pb);
619
            get_byte(pb);
620
            get_byte(pb);
621

    
622
            get_str8(pb, s->title, sizeof(s->title));
623
            get_str8(pb, s->author, sizeof(s->author));
624
            get_str8(pb, s->copyright, sizeof(s->copyright));
625
            get_str8(pb, s->comment, sizeof(s->comment));
626
        }
627
    }
628
    return 0;
629
}
630

    
631
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
632
{
633
    RMContext *rm = s->priv_data;
634
    AVStream *st;
635

    
636
    rm->old_format = 1;
637
    st = av_new_stream(s, 0);
638
    if (!st)
639
        return -1;
640
    return rm_read_audio_stream_info(s, st, 1);
641
}
642

    
643
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
644
{
645
    RMContext *rm = s->priv_data;
646
    AVStream *st;
647
    ByteIOContext *pb = &s->pb;
648
    unsigned int tag, v;
649
    int tag_size, size, codec_data_size, i;
650
    int64_t codec_pos;
651
    unsigned int start_time, duration;
652
    char buf[128];
653
    int flags = 0;
654

    
655
    tag = get_le32(pb);
656
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
657
        /* very old .ra format */
658
        return rm_read_header_old(s, ap);
659
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
660
        return AVERROR_IO;
661
    }
662

    
663
    get_be32(pb); /* header size */
664
    get_be16(pb);
665
    get_be32(pb);
666
    get_be32(pb); /* number of headers */
667

    
668
    for(;;) {
669
        if (url_feof(pb))
670
            goto fail;
671
        tag = get_le32(pb);
672
        tag_size = get_be32(pb);
673
        get_be16(pb);
674
#if 0
675
        printf("tag=%c%c%c%c (%08x) size=%d\n",
676
               (tag) & 0xff,
677
               (tag >> 8) & 0xff,
678
               (tag >> 16) & 0xff,
679
               (tag >> 24) & 0xff,
680
               tag,
681
               tag_size);
682
#endif
683
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
684
            goto fail;
685
        switch(tag) {
686
        case MKTAG('P', 'R', 'O', 'P'):
687
            /* file header */
688
            get_be32(pb); /* max bit rate */
689
            get_be32(pb); /* avg bit rate */
690
            get_be32(pb); /* max packet size */
691
            get_be32(pb); /* avg packet size */
692
            get_be32(pb); /* nb packets */
693
            get_be32(pb); /* duration */
694
            get_be32(pb); /* preroll */
695
            get_be32(pb); /* index offset */
696
            get_be32(pb); /* data offset */
697
            get_be16(pb); /* nb streams */
698
            flags = get_be16(pb); /* flags */
699
            break;
700
        case MKTAG('C', 'O', 'N', 'T'):
701
            get_str(pb, s->title, sizeof(s->title));
702
            get_str(pb, s->author, sizeof(s->author));
703
            get_str(pb, s->copyright, sizeof(s->copyright));
704
            get_str(pb, s->comment, sizeof(s->comment));
705
            break;
706
        case MKTAG('M', 'D', 'P', 'R'):
707
            st = av_new_stream(s, 0);
708
            if (!st)
709
                goto fail;
710
            st->id = get_be16(pb);
711
            get_be32(pb); /* max bit rate */
712
            st->codec->bit_rate = get_be32(pb); /* bit rate */
713
            get_be32(pb); /* max packet size */
714
            get_be32(pb); /* avg packet size */
715
            start_time = get_be32(pb); /* start time */
716
            get_be32(pb); /* preroll */
717
            duration = get_be32(pb); /* duration */
718
            st->start_time = start_time;
719
            st->duration = duration;
720
            get_str8(pb, buf, sizeof(buf)); /* desc */
721
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
722
            codec_data_size = get_be32(pb);
723
            codec_pos = url_ftell(pb);
724
            st->codec->codec_type = CODEC_TYPE_DATA;
725
            av_set_pts_info(st, 64, 1, 1000);
726

    
727
            v = get_be32(pb);
728
            if (v == MKTAG(0xfd, 'a', 'r', '.')) {
729
                /* ra type header */
730
                if (rm_read_audio_stream_info(s, st, 0))
731
                    return -1;
732
            } else {
733
                int fps, fps2;
734
                if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
735
                fail1:
736
                    av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
737
                    goto skip;
738
                }
739
                st->codec->codec_tag = get_le32(pb);
740
//                av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
741
                if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
742
                    && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
743
                    && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
744
                    && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
745
                    goto fail1;
746
                st->codec->width = get_be16(pb);
747
                st->codec->height = get_be16(pb);
748
                st->codec->time_base.num= 1;
749
                fps= get_be16(pb);
750
                st->codec->codec_type = CODEC_TYPE_VIDEO;
751
                get_be32(pb);
752
                fps2= get_be16(pb);
753
                get_be16(pb);
754

    
755
                st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
756

    
757
                if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
758
                    //check is redundant as get_buffer() will catch this
759
                    av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
760
                    return -1;
761
                }
762
                st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
763
                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
764

    
765
//                av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
766
                st->codec->time_base.den = fps * st->codec->time_base.num;
767
                switch(((uint8_t*)st->codec->extradata)[4]>>4){
768
                case 1: st->codec->codec_id = CODEC_ID_RV10; break;
769
                case 2: st->codec->codec_id = CODEC_ID_RV20; break;
770
                case 3: st->codec->codec_id = CODEC_ID_RV30; break;
771
                case 4: st->codec->codec_id = CODEC_ID_RV40; break;
772
                default: goto fail1;
773
                }
774
            }
775
skip:
776
            /* skip codec info */
777
            size = url_ftell(pb) - codec_pos;
778
            url_fskip(pb, codec_data_size - size);
779
            break;
780
        case MKTAG('D', 'A', 'T', 'A'):
781
            goto header_end;
782
        default:
783
            /* unknown tag: skip it */
784
            url_fskip(pb, tag_size - 10);
785
            break;
786
        }
787
    }
788
 header_end:
789
    rm->nb_packets = get_be32(pb); /* number of packets */
790
    if (!rm->nb_packets && (flags & 4))
791
        rm->nb_packets = 3600 * 25;
792
    get_be32(pb); /* next data header */
793
    return 0;
794

    
795
 fail:
796
    for(i=0;i<s->nb_streams;i++) {
797
        av_free(s->streams[i]);
798
    }
799
    return AVERROR_IO;
800
}
801

    
802
static int get_num(ByteIOContext *pb, int *len)
803
{
804
    int n, n1;
805

    
806
    n = get_be16(pb);
807
    (*len)-=2;
808
    if (n >= 0x4000) {
809
        return n - 0x4000;
810
    } else {
811
        n1 = get_be16(pb);
812
        (*len)-=2;
813
        return (n << 16) | n1;
814
    }
815
}
816

    
817
/* multiple of 20 bytes for ra144 (ugly) */
818
#define RAW_PACKET_SIZE 1000
819

    
820
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
821
    RMContext *rm = s->priv_data;
822
    ByteIOContext *pb = &s->pb;
823
    int len, num, res, i;
824
    AVStream *st;
825
    uint32_t state=0xFFFFFFFF;
826

    
827
    while(!url_feof(pb)){
828
        *pos= url_ftell(pb);
829
        if(rm->remaining_len > 0){
830
            num= rm->current_stream;
831
            len= rm->remaining_len;
832
            *timestamp = AV_NOPTS_VALUE;
833
            *flags= 0;
834
        }else{
835
            state= (state<<8) + get_byte(pb);
836

    
837
            if(state == MKBETAG('I', 'N', 'D', 'X')){
838
                len = get_be16(pb) - 6;
839
                if(len<0)
840
                    continue;
841
                goto skip;
842
            }
843

    
844
            if(state > (unsigned)0xFFFF || state < 12)
845
                continue;
846
            len=state;
847
            state= 0xFFFFFFFF;
848

    
849
            num = get_be16(pb);
850
            *timestamp = get_be32(pb);
851
            res= get_byte(pb); /* reserved */
852
            *flags = get_byte(pb); /* flags */
853

    
854

    
855
            len -= 12;
856
        }
857
        for(i=0;i<s->nb_streams;i++) {
858
            st = s->streams[i];
859
            if (num == st->id)
860
                break;
861
        }
862
        if (i == s->nb_streams) {
863
skip:
864
            /* skip packet if unknown number */
865
            url_fskip(pb, len);
866
            rm->remaining_len -= len;
867
            continue;
868
        }
869
        *stream_index= i;
870

    
871
        return len;
872
    }
873
    return -1;
874
}
875

    
876
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
877
{
878
    RMContext *rm = s->priv_data;
879
    ByteIOContext *pb = &s->pb;
880
    AVStream *st;
881
    int i, len, tmp, j;
882
    int64_t timestamp, pos;
883
    uint8_t *ptr;
884
    int flags;
885

    
886
    if (rm->audio_pkt_cnt) {
887
        // If there are queued audio packet return them first
888
        st = s->streams[rm->audio_stream_num];
889
        if (st->codec->codec_id == CODEC_ID_AAC)
890
            av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
891
        else {
892
        av_new_packet(pkt, st->codec->block_align);
893
        memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
894
               (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
895
               st->codec->block_align);
896
        }
897
        rm->audio_pkt_cnt--;
898
        pkt->flags = 0;
899
        pkt->stream_index = rm->audio_stream_num;
900
    } else if (rm->old_format) {
901
        st = s->streams[0];
902
        if (st->codec->codec_id == CODEC_ID_RA_288) {
903
            int x, y;
904

    
905
            for (y = 0; y < rm->sub_packet_h; y++)
906
                for (x = 0; x < rm->sub_packet_h/2; x++)
907
                    if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
908
                        return AVERROR_IO;
909
            rm->audio_stream_num = 0;
910
            rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
911
            // Release first audio packet
912
            av_new_packet(pkt, st->codec->block_align);
913
            memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
914
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
915
            pkt->stream_index = 0;
916
        } else {
917
            /* just read raw bytes */
918
            len = RAW_PACKET_SIZE;
919
            len= av_get_packet(pb, pkt, len);
920
            pkt->stream_index = 0;
921
            if (len <= 0) {
922
                return AVERROR_IO;
923
            }
924
            pkt->size = len;
925
        }
926
    } else {
927
        int seq=1;
928
resync:
929
        len=sync(s, &timestamp, &flags, &i, &pos);
930
        if(len<0)
931
            return AVERROR_IO;
932
        st = s->streams[i];
933

    
934
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
935
            int h, pic_num, len2, pos;
936

    
937
            h= get_byte(pb); len--;
938
            if(!(h & 0x40)){
939
                seq = get_byte(pb); len--;
940
            }
941

    
942
            if((h & 0xc0) == 0x40){
943
                len2= pos= 0;
944
            }else{
945
                len2 = get_num(pb, &len);
946
                pos = get_num(pb, &len);
947
            }
948
            /* picture number */
949
            pic_num= get_byte(pb); len--;
950
            rm->remaining_len= len;
951
            rm->current_stream= st->id;
952

    
953
//            av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num);
954
            if(len2 && len2<len)
955
                len=len2;
956
            rm->remaining_len-= len;
957
            av_get_packet(pb, pkt, len);
958

    
959
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
960
            if ((st->codec->codec_id == CODEC_ID_RA_288) ||
961
                (st->codec->codec_id == CODEC_ID_COOK) ||
962
                (st->codec->codec_id == CODEC_ID_ATRAC3)) {
963
                int x;
964
                int sps = rm->sub_packet_size;
965
                int cfs = rm->coded_framesize;
966
                int h = rm->sub_packet_h;
967
                int y = rm->sub_packet_cnt;
968
                int w = rm->audio_framesize;
969

    
970
                if (flags & 2)
971
                    y = rm->sub_packet_cnt = 0;
972
                if (!y)
973
                    rm->audiotimestamp = timestamp;
974

    
975
                switch(st->codec->codec_id) {
976
                    case CODEC_ID_RA_288:
977
                        for (x = 0; x < h/2; x++)
978
                            get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
979
                        break;
980
                    case CODEC_ID_ATRAC3:
981
                    case CODEC_ID_COOK:
982
                        for (x = 0; x < w/sps; x++)
983
                            get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
984
                        break;
985
                }
986

    
987
                if (++(rm->sub_packet_cnt) < h)
988
                    goto resync;
989
                else {
990
                    rm->sub_packet_cnt = 0;
991
                    rm->audio_stream_num = i;
992
                    rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
993
                    // Release first audio packet
994
                    av_new_packet(pkt, st->codec->block_align);
995
                    memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
996
                    timestamp = rm->audiotimestamp;
997
                    flags = 2; // Mark first packet as keyframe
998
                }
999
            } else if (st->codec->codec_id == CODEC_ID_AAC) {
1000
                int x;
1001
                rm->audio_stream_num = i;
1002
                rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
1003
                if (rm->sub_packet_cnt) {
1004
                    for (x = 0; x < rm->sub_packet_cnt; x++)
1005
                        rm->sub_packet_lengths[x] = get_be16(pb);
1006
                    // Release first audio packet
1007
                    rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
1008
                    av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
1009
                    flags = 2; // Mark first packet as keyframe
1010
                }
1011
            } else
1012
                av_get_packet(pb, pkt, len);
1013

    
1014
        } else
1015
            av_get_packet(pb, pkt, len);
1016

    
1017
        if(  (st->discard >= AVDISCARD_NONKEY && !(flags&2))
1018
           || st->discard >= AVDISCARD_ALL){
1019
            av_free_packet(pkt);
1020
            goto resync;
1021
        }
1022

    
1023
        pkt->stream_index = i;
1024

    
1025
#if 0
1026
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1027
            if(st->codec->codec_id == CODEC_ID_RV20){
1028
                int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
1029
                av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", timestamp, timestamp*512LL/25, seq);
1030

1031
                seq |= (timestamp&~0x3FFF);
1032
                if(seq - timestamp >  0x2000) seq -= 0x4000;
1033
                if(seq - timestamp < -0x2000) seq += 0x4000;
1034
            }
1035
        }
1036
#endif
1037
        pkt->pts= timestamp;
1038
        if(flags&2){
1039
            pkt->flags |= PKT_FLAG_KEY;
1040
            if((seq&0x7F) == 1)
1041
                av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
1042
        }
1043
    }
1044

    
1045
    /* for AC3, needs to swap bytes */
1046
    if (st->codec->codec_id == CODEC_ID_AC3) {
1047
        ptr = pkt->data;
1048
        for(j=0;j<len;j+=2) {
1049
            tmp = ptr[0];
1050
            ptr[0] = ptr[1];
1051
            ptr[1] = tmp;
1052
                ptr += 2;
1053
        }
1054
    }
1055
    return 0;
1056
}
1057

    
1058
static int rm_read_close(AVFormatContext *s)
1059
{
1060
    RMContext *rm = s->priv_data;
1061

    
1062
    av_free(rm->audiobuf);
1063
    return 0;
1064
}
1065

    
1066
static int rm_probe(AVProbeData *p)
1067
{
1068
    /* check file header */
1069
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
1070
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
1071
         p->buf[4] == 0 && p->buf[5] == 0) ||
1072
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
1073
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
1074
        return AVPROBE_SCORE_MAX;
1075
    else
1076
        return 0;
1077
}
1078

    
1079
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
1080
                               int64_t *ppos, int64_t pos_limit)
1081
{
1082
    RMContext *rm = s->priv_data;
1083
    int64_t pos, dts;
1084
    int stream_index2, flags, len, h;
1085

    
1086
    pos = *ppos;
1087

    
1088
    if(rm->old_format)
1089
        return AV_NOPTS_VALUE;
1090

    
1091
    url_fseek(&s->pb, pos, SEEK_SET);
1092
    rm->remaining_len=0;
1093
    for(;;){
1094
        int seq=1;
1095
        AVStream *st;
1096

    
1097
        len=sync(s, &dts, &flags, &stream_index2, &pos);
1098
        if(len<0)
1099
            return AV_NOPTS_VALUE;
1100

    
1101
        st = s->streams[stream_index2];
1102
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1103
            h= get_byte(&s->pb); len--;
1104
            if(!(h & 0x40)){
1105
                seq = get_byte(&s->pb); len--;
1106
            }
1107
        }
1108

    
1109
        if((flags&2) && (seq&0x7F) == 1){
1110
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
1111
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1112
            if(stream_index2 == stream_index)
1113
                break;
1114
        }
1115

    
1116
        url_fskip(&s->pb, len);
1117
    }
1118
    *ppos = pos;
1119
    return dts;
1120
}
1121

    
1122
#ifdef CONFIG_RM_DEMUXER
1123
AVInputFormat rm_demuxer = {
1124
    "rm",
1125
    "rm format",
1126
    sizeof(RMContext),
1127
    rm_probe,
1128
    rm_read_header,
1129
    rm_read_packet,
1130
    rm_read_close,
1131
    NULL,
1132
    rm_read_dts,
1133
};
1134
#endif
1135
#ifdef CONFIG_RM_MUXER
1136
AVOutputFormat rm_muxer = {
1137
    "rm",
1138
    "rm format",
1139
    "application/vnd.rn-realmedia",
1140
    "rm,ra",
1141
    sizeof(RMContext),
1142
    CODEC_ID_AC3,
1143
    CODEC_ID_RV10,
1144
    rm_write_header,
1145
    rm_write_packet,
1146
    rm_write_trailer,
1147
};
1148
#endif