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1
/*
2
 * MPEG1/2 mux/demux
3
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4
 *
5
 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9
 *
10
 * This library is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * Lesser General Public License for more details.
14
 *
15
 * You should have received a copy of the GNU Lesser General Public
16
 * License along with this library; if not, write to the Free Software
17
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18
 */
19
#include "avformat.h"
20

    
21
#define MAX_PAYLOAD_SIZE 4096
22
#define NB_STREAMS 2
23

    
24
typedef struct {
25
    uint8_t buffer[MAX_PAYLOAD_SIZE];
26
    int buffer_ptr;
27
    uint8_t id;
28
    int max_buffer_size; /* in bytes */
29
    int packet_number;
30
    int64_t start_pts;
31
} StreamInfo;
32

    
33
typedef struct {
34
    int packet_size; /* required packet size */
35
    int packet_data_max_size; /* maximum data size inside a packet */
36
    int packet_number;
37
    int pack_header_freq;     /* frequency (in packets^-1) at which we send pack headers */
38
    int system_header_freq;
39
    int mux_rate; /* bitrate in units of 50 bytes/s */
40
    /* stream info */
41
    int audio_bound;
42
    int video_bound;
43
    int is_mpeg2;
44
    int is_vcd;
45
} MpegMuxContext;
46

    
47
#define PACK_START_CODE             ((unsigned int)0x000001ba)
48
#define SYSTEM_HEADER_START_CODE    ((unsigned int)0x000001bb)
49
#define SEQUENCE_END_CODE           ((unsigned int)0x000001b7)
50
#define PACKET_START_CODE_MASK      ((unsigned int)0xffffff00)
51
#define PACKET_START_CODE_PREFIX    ((unsigned int)0x00000100)
52
#define ISO_11172_END_CODE          ((unsigned int)0x000001b9)
53
  
54
/* mpeg2 */
55
#define PROGRAM_STREAM_MAP 0x1bc
56
#define PRIVATE_STREAM_1   0x1bd
57
#define PADDING_STREAM     0x1be
58
#define PRIVATE_STREAM_2   0x1bf
59

    
60

    
61
#define AUDIO_ID 0xc0
62
#define VIDEO_ID 0xe0
63

    
64
#ifdef CONFIG_ENCODERS
65
extern AVOutputFormat mpeg1system_mux;
66
extern AVOutputFormat mpeg1vcd_mux;
67
extern AVOutputFormat mpeg2vob_mux;
68

    
69
static int put_pack_header(AVFormatContext *ctx, 
70
                           uint8_t *buf, int64_t timestamp)
71
{
72
    MpegMuxContext *s = ctx->priv_data;
73
    PutBitContext pb;
74
    
75
    init_put_bits(&pb, buf, 128);
76

    
77
    put_bits(&pb, 32, PACK_START_CODE);
78
    if (s->is_mpeg2) {
79
        put_bits(&pb, 2, 0x1);
80
    } else {
81
        put_bits(&pb, 4, 0x2);
82
    }
83
    put_bits(&pb, 3, (uint32_t)((timestamp >> 30) & 0x07));
84
    put_bits(&pb, 1, 1);
85
    put_bits(&pb, 15, (uint32_t)((timestamp >> 15) & 0x7fff));
86
    put_bits(&pb, 1, 1);
87
    put_bits(&pb, 15, (uint32_t)((timestamp) & 0x7fff));
88
    put_bits(&pb, 1, 1);
89
    if (s->is_mpeg2) {
90
        /* clock extension */
91
        put_bits(&pb, 9, 0);
92
        put_bits(&pb, 1, 1);
93
    }
94
    put_bits(&pb, 1, 1);
95
    put_bits(&pb, 22, s->mux_rate);
96
    put_bits(&pb, 1, 1);
97
    if (s->is_mpeg2) {
98
        put_bits(&pb, 5, 0x1f); /* reserved */
99
        put_bits(&pb, 3, 0); /* stuffing length */
100
    }
101
    flush_put_bits(&pb);
102
    return pbBufPtr(&pb) - pb.buf;
103
}
104

    
105
static int put_system_header(AVFormatContext *ctx, uint8_t *buf)
106
{
107
    MpegMuxContext *s = ctx->priv_data;
108
    int size, rate_bound, i, private_stream_coded, id;
109
    PutBitContext pb;
110

    
111
    init_put_bits(&pb, buf, 128);
112

    
113
    put_bits(&pb, 32, SYSTEM_HEADER_START_CODE);
114
    put_bits(&pb, 16, 0);
115
    put_bits(&pb, 1, 1);
116
    
117
    rate_bound = s->mux_rate; /* maximum bit rate of the multiplexed stream */
118
    put_bits(&pb, 22, rate_bound);
119
    put_bits(&pb, 1, 1); /* marker */
120
    put_bits(&pb, 6, s->audio_bound);
121

    
122
    put_bits(&pb, 1, 1); /* variable bitrate */
123
    put_bits(&pb, 1, 1); /* non constrainted bit stream */
124
    
125
    put_bits(&pb, 1, 0); /* audio locked */
126
    put_bits(&pb, 1, 0); /* video locked */
127
    put_bits(&pb, 1, 1); /* marker */
128

    
129
    put_bits(&pb, 5, s->video_bound);
130
    put_bits(&pb, 8, 0xff); /* reserved byte */
131
    
132
    /* audio stream info */
133
    private_stream_coded = 0;
134
    for(i=0;i<ctx->nb_streams;i++) {
135
        StreamInfo *stream = ctx->streams[i]->priv_data;
136
        id = stream->id;
137
        if (id < 0xc0) {
138
            /* special case for private streams (AC3 use that) */
139
            if (private_stream_coded)
140
                continue;
141
            private_stream_coded = 1;
142
            id = 0xbd;
143
        }
144
        put_bits(&pb, 8, id); /* stream ID */
145
        put_bits(&pb, 2, 3);
146
        if (id < 0xe0) {
147
            /* audio */
148
            put_bits(&pb, 1, 0);
149
            put_bits(&pb, 13, stream->max_buffer_size / 128);
150
        } else {
151
            /* video */
152
            put_bits(&pb, 1, 1);
153
            put_bits(&pb, 13, stream->max_buffer_size / 1024);
154
        }
155
    }
156
    flush_put_bits(&pb);
157
    size = pbBufPtr(&pb) - pb.buf;
158
    /* patch packet size */
159
    buf[4] = (size - 6) >> 8;
160
    buf[5] = (size - 6) & 0xff;
161

    
162
    return size;
163
}
164

    
165
static int mpeg_mux_init(AVFormatContext *ctx)
166
{
167
    MpegMuxContext *s = ctx->priv_data;
168
    int bitrate, i, mpa_id, mpv_id, ac3_id;
169
    AVStream *st;
170
    StreamInfo *stream;
171

    
172
    s->packet_number = 0;
173
    s->is_vcd = (ctx->oformat == &mpeg1vcd_mux);
174
    s->is_mpeg2 = (ctx->oformat == &mpeg2vob_mux);
175
    
176
    if (s->is_vcd)
177
        s->packet_size = 2324; /* VCD packet size */
178
    else
179
        s->packet_size = 2048;
180
        
181
    /* startcode(4) + length(2) + flags(1) */
182
    s->packet_data_max_size = s->packet_size - 7;
183
    s->audio_bound = 0;
184
    s->video_bound = 0;
185
    mpa_id = AUDIO_ID;
186
    ac3_id = 0x80;
187
    mpv_id = VIDEO_ID;
188
    for(i=0;i<ctx->nb_streams;i++) {
189
        st = ctx->streams[i];
190
        stream = av_mallocz(sizeof(StreamInfo));
191
        if (!stream)
192
            goto fail;
193
        st->priv_data = stream;
194

    
195
        switch(st->codec.codec_type) {
196
        case CODEC_TYPE_AUDIO:
197
            if (st->codec.codec_id == CODEC_ID_AC3)
198
                stream->id = ac3_id++;
199
            else
200
                stream->id = mpa_id++;
201
            stream->max_buffer_size = 4 * 1024; 
202
            s->audio_bound++;
203
            break;
204
        case CODEC_TYPE_VIDEO:
205
            stream->id = mpv_id++;
206
            stream->max_buffer_size = 46 * 1024; 
207
            s->video_bound++;
208
            break;
209
        default:
210
            av_abort();
211
        }
212
    }
213

    
214
    /* we increase slightly the bitrate to take into account the
215
       headers. XXX: compute it exactly */
216
    bitrate = 2000;
217
    for(i=0;i<ctx->nb_streams;i++) {
218
        st = ctx->streams[i];
219
        bitrate += st->codec.bit_rate;
220
    }
221
    s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
222
    
223
    if (s->is_vcd || s->is_mpeg2)
224
        /* every packet */
225
        s->pack_header_freq = 1;
226
    else
227
        /* every 2 seconds */
228
        s->pack_header_freq = 2 * bitrate / s->packet_size / 8;
229
    
230
    if (s->is_mpeg2)
231
        /* every 200 packets. Need to look at the spec.  */
232
        s->system_header_freq = s->pack_header_freq * 40;
233
    else if (s->is_vcd)
234
        /* every 40 packets, this is my invention */
235
        s->system_header_freq = s->pack_header_freq * 40;
236
    else
237
        s->system_header_freq = s->pack_header_freq * 5;
238
    
239
    for(i=0;i<ctx->nb_streams;i++) {
240
        stream = ctx->streams[i]->priv_data;
241
        stream->buffer_ptr = 0;
242
        stream->packet_number = 0;
243
        stream->start_pts = -1;
244
    }
245
    return 0;
246
 fail:
247
    for(i=0;i<ctx->nb_streams;i++) {
248
        av_free(ctx->streams[i]->priv_data);
249
    }
250
    return -ENOMEM;
251
}
252

    
253
/* flush the packet on stream stream_index */
254
static void flush_packet(AVFormatContext *ctx, int stream_index)
255
{
256
    MpegMuxContext *s = ctx->priv_data;
257
    StreamInfo *stream = ctx->streams[stream_index]->priv_data;
258
    uint8_t *buf_ptr;
259
    int size, payload_size, startcode, id, len, stuffing_size, i, header_len;
260
    int64_t timestamp;
261
    uint8_t buffer[128];
262
    
263
    id = stream->id;
264
    timestamp = stream->start_pts;
265

    
266
#if 0
267
    printf("packet ID=%2x PTS=%0.3f\n", 
268
           id, timestamp / 90000.0);
269
#endif
270

    
271
    buf_ptr = buffer;
272
    if (((s->packet_number % s->pack_header_freq) == 0)) {
273
        /* output pack and systems header if needed */
274
        size = put_pack_header(ctx, buf_ptr, timestamp);
275
        buf_ptr += size;
276
        if ((s->packet_number % s->system_header_freq) == 0) {
277
            size = put_system_header(ctx, buf_ptr);
278
            buf_ptr += size;
279
        }
280
    }
281
    size = buf_ptr - buffer;
282
    put_buffer(&ctx->pb, buffer, size);
283

    
284
    /* packet header */
285
    if (s->is_mpeg2) {
286
        header_len = 8;
287
    } else {
288
        header_len = 5;
289
    }
290
    payload_size = s->packet_size - (size + 6 + header_len);
291
    if (id < 0xc0) {
292
        startcode = PRIVATE_STREAM_1;
293
        payload_size -= 4;
294
    } else {
295
        startcode = 0x100 + id;
296
    }
297
    stuffing_size = payload_size - stream->buffer_ptr;
298
    if (stuffing_size < 0)
299
        stuffing_size = 0;
300

    
301
    put_be32(&ctx->pb, startcode);
302

    
303
    put_be16(&ctx->pb, payload_size + header_len);
304
    /* stuffing */
305
    for(i=0;i<stuffing_size;i++)
306
        put_byte(&ctx->pb, 0xff);
307

    
308
    if (s->is_mpeg2) {
309
        put_byte(&ctx->pb, 0x80); /* mpeg2 id */
310
        put_byte(&ctx->pb, 0x80); /* flags */
311
        put_byte(&ctx->pb, 0x05); /* header len (only pts is included) */
312
    }
313
    put_byte(&ctx->pb, 
314
             (0x02 << 4) | 
315
             (((timestamp >> 30) & 0x07) << 1) | 
316
             1);
317
    put_be16(&ctx->pb, (uint16_t)((((timestamp >> 15) & 0x7fff) << 1) | 1));
318
    put_be16(&ctx->pb, (uint16_t)((((timestamp) & 0x7fff) << 1) | 1));
319

    
320
    if (startcode == PRIVATE_STREAM_1) {
321
        put_byte(&ctx->pb, id);
322
        if (id >= 0x80 && id <= 0xbf) {
323
            /* XXX: need to check AC3 spec */
324
            put_byte(&ctx->pb, 1);
325
            put_byte(&ctx->pb, 0);
326
            put_byte(&ctx->pb, 2);
327
        }
328
    }
329

    
330
    /* output data */
331
    put_buffer(&ctx->pb, stream->buffer, payload_size - stuffing_size);
332
    put_flush_packet(&ctx->pb);
333
    
334
    /* preserve remaining data */
335
    len = stream->buffer_ptr - payload_size;
336
    if (len < 0) 
337
        len = 0;
338
    memmove(stream->buffer, stream->buffer + stream->buffer_ptr - len, len);
339
    stream->buffer_ptr = len;
340

    
341
    s->packet_number++;
342
    stream->packet_number++;
343
    stream->start_pts = -1;
344
}
345

    
346
static int mpeg_mux_write_packet(AVFormatContext *ctx, int stream_index,
347
                                 const uint8_t *buf, int size, int64_t pts)
348
{
349
    MpegMuxContext *s = ctx->priv_data;
350
    AVStream *st = ctx->streams[stream_index];
351
    StreamInfo *stream = st->priv_data;
352
    int len;
353
    
354
    while (size > 0) {
355
        /* set pts */
356
        if (stream->start_pts == -1) {
357
            stream->start_pts = pts;
358
        }
359
        len = s->packet_data_max_size - stream->buffer_ptr;
360
        if (len > size)
361
            len = size;
362
        memcpy(stream->buffer + stream->buffer_ptr, buf, len);
363
        stream->buffer_ptr += len;
364
        buf += len;
365
        size -= len;
366
        while (stream->buffer_ptr >= s->packet_data_max_size) {
367
            /* output the packet */
368
            if (stream->start_pts == -1)
369
                stream->start_pts = pts;
370
            flush_packet(ctx, stream_index);
371
        }
372
    }
373
    return 0;
374
}
375

    
376
static int mpeg_mux_end(AVFormatContext *ctx)
377
{
378
    StreamInfo *stream;
379
    int i;
380

    
381
    /* flush each packet */
382
    for(i=0;i<ctx->nb_streams;i++) {
383
        stream = ctx->streams[i]->priv_data;
384
        if (stream->buffer_ptr > 0) {
385
            flush_packet(ctx, i);
386
        }
387
    }
388

    
389
    /* End header according to MPEG1 systems standard. We do not write
390
       it as it is usually not needed by decoders and because it
391
       complicates MPEG stream concatenation. */
392
    //put_be32(&ctx->pb, ISO_11172_END_CODE);
393
    //put_flush_packet(&ctx->pb);
394

    
395
    for(i=0;i<ctx->nb_streams;i++)
396
        av_freep(&ctx->streams[i]->priv_data);
397

    
398
    return 0;
399
}
400
#endif //CONFIG_ENCODERS
401

    
402
/*********************************************/
403
/* demux code */
404

    
405
#define MAX_SYNC_SIZE 100000
406

    
407
static int mpegps_probe(AVProbeData *p)
408
{
409
    int code, c, i;
410

    
411
    code = 0xff;
412
    /* we search the first start code. If it is a packet start code,
413
       then we decide it is mpeg ps. We do not send highest value to
414
       give a chance to mpegts */
415
    /* NOTE: the search range was restricted to avoid too many false
416
       detections */
417

    
418
    if (p->buf_size < 6)
419
        return 0;
420

    
421
    for (i = 0; i < 20; i++) {
422
        c = p->buf[i];
423
        code = (code << 8) | c;
424
        if ((code & 0xffffff00) == 0x100) {
425
            if (code == PACK_START_CODE ||
426
                code == SYSTEM_HEADER_START_CODE ||
427
                (code >= 0x1e0 && code <= 0x1ef) ||
428
                (code >= 0x1c0 && code <= 0x1df) ||
429
                code == PRIVATE_STREAM_2 ||
430
                code == PROGRAM_STREAM_MAP ||
431
                code == PRIVATE_STREAM_1 ||
432
                code == PADDING_STREAM)
433
                return AVPROBE_SCORE_MAX - 2;
434
            else
435
                return 0;
436
        }
437
    }
438
    return 0;
439
}
440

    
441

    
442
typedef struct MpegDemuxContext {
443
    int header_state;
444
} MpegDemuxContext;
445

    
446
static int find_start_code(ByteIOContext *pb, int *size_ptr, 
447
                           uint32_t *header_state)
448
{
449
    unsigned int state, v;
450
    int val, n;
451

    
452
    state = *header_state;
453
    n = *size_ptr;
454
    while (n > 0) {
455
        if (url_feof(pb))
456
            break;
457
        v = get_byte(pb);
458
        n--;
459
        if (state == 0x000001) {
460
            state = ((state << 8) | v) & 0xffffff;
461
            val = state;
462
            goto found;
463
        }
464
        state = ((state << 8) | v) & 0xffffff;
465
    }
466
    val = -1;
467
 found:
468
    *header_state = state;
469
    *size_ptr = n;
470
    return val;
471
}
472

    
473
static int mpegps_read_header(AVFormatContext *s,
474
                                  AVFormatParameters *ap)
475
{
476
    MpegDemuxContext *m = s->priv_data;
477
    m->header_state = 0xff;
478
    /* no need to do more */
479
    return 0;
480
}
481

    
482
static int64_t get_pts(ByteIOContext *pb, int c)
483
{
484
    int64_t pts;
485
    int val;
486

    
487
    if (c < 0)
488
        c = get_byte(pb);
489
    pts = (int64_t)((c >> 1) & 0x07) << 30;
490
    val = get_be16(pb);
491
    pts |= (int64_t)(val >> 1) << 15;
492
    val = get_be16(pb);
493
    pts |= (int64_t)(val >> 1);
494
    return pts;
495
}
496

    
497
static int mpegps_read_packet(AVFormatContext *s,
498
                                  AVPacket *pkt)
499
{
500
    MpegDemuxContext *m = s->priv_data;
501
    AVStream *st;
502
    int len, size, startcode, i, c, flags, header_len, type, codec_id;
503
    int64_t pts, dts;
504

    
505
    /* next start code (should be immediately after) */
506
 redo:
507
    m->header_state = 0xff;
508
    size = MAX_SYNC_SIZE;
509
    startcode = find_start_code(&s->pb, &size, &m->header_state);
510
    //printf("startcode=%x pos=0x%Lx\n", startcode, url_ftell(&s->pb));
511
    if (startcode < 0)
512
        return -EIO;
513
    if (startcode == PACK_START_CODE)
514
        goto redo;
515
    if (startcode == SYSTEM_HEADER_START_CODE)
516
        goto redo;
517
    if (startcode == PADDING_STREAM ||
518
        startcode == PRIVATE_STREAM_2) {
519
        /* skip them */
520
        len = get_be16(&s->pb);
521
        url_fskip(&s->pb, len);
522
        goto redo;
523
    }
524
    /* find matching stream */
525
    if (!((startcode >= 0x1c0 && startcode <= 0x1df) ||
526
          (startcode >= 0x1e0 && startcode <= 0x1ef) ||
527
          (startcode == 0x1bd)))
528
        goto redo;
529

    
530
    len = get_be16(&s->pb);
531
    pts = AV_NOPTS_VALUE;
532
    dts = AV_NOPTS_VALUE;
533
    /* stuffing */
534
    for(;;) {
535
        c = get_byte(&s->pb);
536
        len--;
537
        /* XXX: for mpeg1, should test only bit 7 */
538
        if (c != 0xff) 
539
            break;
540
    }
541
    if ((c & 0xc0) == 0x40) {
542
        /* buffer scale & size */
543
        get_byte(&s->pb);
544
        c = get_byte(&s->pb);
545
        len -= 2;
546
    }
547
    if ((c & 0xf0) == 0x20) {
548
        pts = get_pts(&s->pb, c);
549
        len -= 4;
550
    } else if ((c & 0xf0) == 0x30) {
551
        pts = get_pts(&s->pb, c);
552
        dts = get_pts(&s->pb, -1);
553
        len -= 9;
554
    } else if ((c & 0xc0) == 0x80) {
555
        /* mpeg 2 PES */
556
        if ((c & 0x30) != 0) {
557
            fprintf(stderr, "Encrypted multiplex not handled\n");
558
            return -EIO;
559
        }
560
        flags = get_byte(&s->pb);
561
        header_len = get_byte(&s->pb);
562
        len -= 2;
563
        if (header_len > len)
564
            goto redo;
565
        if ((flags & 0xc0) == 0x80) {
566
            pts = get_pts(&s->pb, -1);
567
            header_len -= 5;
568
            len -= 5;
569
        } if ((flags & 0xc0) == 0xc0) {
570
            pts = get_pts(&s->pb, -1);
571
            dts = get_pts(&s->pb, -1);
572
            header_len -= 10;
573
            len -= 10;
574
        }
575
        len -= header_len;
576
        while (header_len > 0) {
577
            get_byte(&s->pb);
578
            header_len--;
579
        }
580
    }
581
    if (startcode == 0x1bd) {
582
        startcode = get_byte(&s->pb);
583
        len--;
584
        if (startcode >= 0x80 && startcode <= 0xbf) {
585
            /* audio: skip header */
586
            get_byte(&s->pb);
587
            get_byte(&s->pb);
588
            get_byte(&s->pb);
589
            len -= 3;
590
        }
591
    }
592

    
593
    /* now find stream */
594
    for(i=0;i<s->nb_streams;i++) {
595
        st = s->streams[i];
596
        if (st->id == startcode)
597
            goto found;
598
    }
599
    if (startcode >= 0x1e0 && startcode <= 0x1ef) {
600
        type = CODEC_TYPE_VIDEO;
601
        codec_id = CODEC_ID_MPEG1VIDEO;
602
    } else if (startcode >= 0x1c0 && startcode <= 0x1df) {
603
        type = CODEC_TYPE_AUDIO;
604
        codec_id = CODEC_ID_MP2;
605
    } else if (startcode >= 0x80 && startcode <= 0x9f) {
606
        type = CODEC_TYPE_AUDIO;
607
        codec_id = CODEC_ID_AC3;
608
    } else if (startcode >= 0xa0 && startcode <= 0xbf) {
609
        type = CODEC_TYPE_AUDIO;
610
        codec_id = CODEC_ID_PCM_S16BE;
611
    } else {
612
    skip:
613
        /* skip packet */
614
        url_fskip(&s->pb, len);
615
        goto redo;
616
    }
617
    /* no stream found: add a new stream */
618
    st = av_new_stream(s, startcode);
619
    if (!st) 
620
        goto skip;
621
    st->codec.codec_type = type;
622
    st->codec.codec_id = codec_id;
623
 found:
624
    if (startcode >= 0xa0 && startcode <= 0xbf) {
625
        int b1, freq;
626
        static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };
627

    
628
        /* for LPCM, we just skip the header and consider it is raw
629
           audio data */
630
        if (len <= 3)
631
            goto skip;
632
        get_byte(&s->pb); /* emphasis (1), muse(1), reserved(1), frame number(5) */
633
        b1 = get_byte(&s->pb); /* quant (2), freq(2), reserved(1), channels(3) */
634
        get_byte(&s->pb); /* dynamic range control (0x80 = off) */
635
        len -= 3;
636
        freq = (b1 >> 4) & 3;
637
        st->codec.sample_rate = lpcm_freq_tab[freq];
638
        st->codec.channels = 1 + (b1 & 7);
639
        st->codec.bit_rate = st->codec.channels * st->codec.sample_rate * 2;
640
    }
641
    av_new_packet(pkt, len);
642
    //printf("\nRead Packet ID: %x PTS: %f Size: %d", startcode,
643
    //       (float)pts/90000, len);
644
    get_buffer(&s->pb, pkt->data, pkt->size);
645
    pkt->pts = pts;
646
    pkt->stream_index = st->index;
647
    return 0;
648
}
649

    
650
static int mpegps_read_close(AVFormatContext *s)
651
{
652
    return 0;
653
}
654

    
655
#ifdef CONFIG_ENCODERS
656
static AVOutputFormat mpeg1system_mux = {
657
    "mpeg",
658
    "MPEG1 System format",
659
    "video/mpeg",
660
    "mpg,mpeg",
661
    sizeof(MpegMuxContext),
662
    CODEC_ID_MP2,
663
    CODEC_ID_MPEG1VIDEO,
664
    mpeg_mux_init,
665
    mpeg_mux_write_packet,
666
    mpeg_mux_end,
667
};
668

    
669
static AVOutputFormat mpeg1vcd_mux = {
670
    "vcd",
671
    "MPEG1 System format (VCD)",
672
    "video/mpeg",
673
    NULL,
674
    sizeof(MpegMuxContext),
675
    CODEC_ID_MP2,
676
    CODEC_ID_MPEG1VIDEO,
677
    mpeg_mux_init,
678
    mpeg_mux_write_packet,
679
    mpeg_mux_end,
680
};
681

    
682
static AVOutputFormat mpeg2vob_mux = {
683
    "vob",
684
    "MPEG2 PS format (VOB)",
685
    "video/mpeg",
686
    "vob",
687
    sizeof(MpegMuxContext),
688
    CODEC_ID_MP2,
689
    CODEC_ID_MPEG1VIDEO,
690
    mpeg_mux_init,
691
    mpeg_mux_write_packet,
692
    mpeg_mux_end,
693
};
694
#endif //CONFIG_ENCODERS
695

    
696
AVInputFormat mpegps_demux = {
697
    "mpeg",
698
    "MPEG PS format",
699
    sizeof(MpegDemuxContext),
700
    mpegps_probe,
701
    mpegps_read_header,
702
    mpegps_read_packet,
703
    mpegps_read_close,
704
    .flags = AVFMT_NOHEADER,
705
};
706

    
707
int mpegps_init(void)
708
{
709
#ifdef CONFIG_ENCODERS
710
    av_register_output_format(&mpeg1system_mux);
711
    av_register_output_format(&mpeg1vcd_mux);
712
    av_register_output_format(&mpeg2vob_mux);
713
#endif //CONFIG_ENCODERS
714
    av_register_input_format(&mpegps_demux);
715
    return 0;
716
}