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ffmpeg / libavformat / rmdec.c @ 07cb073b

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1
/*
2
 * "Real" compatible 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.
11
 *
12
 * 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.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
#include "libavutil/avstring.h"
23
#include "avformat.h"
24
#include "rm.h"
25

    
26
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
27
{
28
    int i;
29
    char *q, r;
30

    
31
    q = buf;
32
    for(i=0;i<len;i++) {
33
        r = get_byte(pb);
34
        if (i < buf_size - 1)
35
            *q++ = r;
36
    }
37
    if (buf_size > 0) *q = '\0';
38
}
39

    
40
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
41
{
42
    get_strl(pb, buf, buf_size, get_be16(pb));
43
}
44

    
45
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
46
{
47
    get_strl(pb, buf, buf_size, get_byte(pb));
48
}
49

    
50
static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
51
                                      int read_all)
52
{
53
    RMContext *rm = s->priv_data;
54
    ByteIOContext *pb = s->pb;
55
    char buf[256];
56
    uint32_t version;
57
    int i;
58

    
59
    /* ra type header */
60
    version = get_be32(pb); /* version */
61
    if (((version >> 16) & 0xff) == 3) {
62
        int64_t startpos = url_ftell(pb);
63
        /* very old version */
64
        for(i = 0; i < 14; i++)
65
            get_byte(pb);
66
        get_str8(pb, s->title, sizeof(s->title));
67
        get_str8(pb, s->author, sizeof(s->author));
68
        get_str8(pb, s->copyright, sizeof(s->copyright));
69
        get_str8(pb, s->comment, sizeof(s->comment));
70
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
71
        // fourcc (should always be "lpcJ")
72
        get_byte(pb);
73
        get_str8(pb, buf, sizeof(buf));
74
        }
75
        // Skip extra header crap (this should never happen)
76
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
77
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
78
        st->codec->sample_rate = 8000;
79
        st->codec->channels = 1;
80
        st->codec->codec_type = CODEC_TYPE_AUDIO;
81
        st->codec->codec_id = CODEC_ID_RA_144;
82
    } else {
83
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
84
        /* old version (4) */
85
        get_be32(pb); /* .ra4 */
86
        get_be32(pb); /* data size */
87
        get_be16(pb); /* version2 */
88
        get_be32(pb); /* header size */
89
        flavor= get_be16(pb); /* add codec info / flavor */
90
        rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
91
        get_be32(pb); /* ??? */
92
        get_be32(pb); /* ??? */
93
        get_be32(pb); /* ??? */
94
        rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
95
        st->codec->block_align= get_be16(pb); /* frame size */
96
        rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
97
        get_be16(pb); /* ??? */
98
        if (((version >> 16) & 0xff) == 5) {
99
            get_be16(pb); get_be16(pb); get_be16(pb); }
100
        st->codec->sample_rate = get_be16(pb);
101
        get_be32(pb);
102
        st->codec->channels = get_be16(pb);
103
        if (((version >> 16) & 0xff) == 5) {
104
            get_be32(pb);
105
            buf[0] = get_byte(pb);
106
            buf[1] = get_byte(pb);
107
            buf[2] = get_byte(pb);
108
            buf[3] = get_byte(pb);
109
            buf[4] = 0;
110
        } else {
111
            get_str8(pb, buf, sizeof(buf)); /* desc */
112
            get_str8(pb, buf, sizeof(buf)); /* desc */
113
        }
114
        st->codec->codec_type = CODEC_TYPE_AUDIO;
115
        if (!strcmp(buf, "dnet")) {
116
            st->codec->codec_id = CODEC_ID_AC3;
117
            st->need_parsing = AVSTREAM_PARSE_FULL;
118
        } else if (!strcmp(buf, "28_8")) {
119
            st->codec->codec_id = CODEC_ID_RA_288;
120
            st->codec->extradata_size= 0;
121
            rm->audio_framesize = st->codec->block_align;
122
            st->codec->block_align = coded_framesize;
123

    
124
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
125
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
126
                return -1;
127
            }
128

    
129
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
130
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
131
            int codecdata_length, i;
132
            get_be16(pb); get_byte(pb);
133
            if (((version >> 16) & 0xff) == 5)
134
                get_byte(pb);
135
            codecdata_length = get_be32(pb);
136
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
137
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
138
                return -1;
139
            }
140

    
141
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
142
            else st->codec->codec_id = CODEC_ID_ATRAC3;
143
            st->codec->extradata_size= codecdata_length;
144
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
145
            for(i = 0; i < codecdata_length; i++)
146
                ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
147
            rm->audio_framesize = st->codec->block_align;
148
            st->codec->block_align = rm->sub_packet_size;
149

    
150
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
151
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
152
                return -1;
153
            }
154

    
155
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
156
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
157
            int codecdata_length, i;
158
            get_be16(pb); get_byte(pb);
159
            if (((version >> 16) & 0xff) == 5)
160
                get_byte(pb);
161
            st->codec->codec_id = CODEC_ID_AAC;
162
            codecdata_length = get_be32(pb);
163
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
164
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
165
                return -1;
166
            }
167
            if (codecdata_length >= 1) {
168
                st->codec->extradata_size = codecdata_length - 1;
169
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
170
                get_byte(pb);
171
                for(i = 0; i < st->codec->extradata_size; i++)
172
                    ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
173
            }
174
        } else {
175
            st->codec->codec_id = CODEC_ID_NONE;
176
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
177
        }
178
        if (read_all) {
179
            get_byte(pb);
180
            get_byte(pb);
181
            get_byte(pb);
182

    
183
            get_str8(pb, s->title, sizeof(s->title));
184
            get_str8(pb, s->author, sizeof(s->author));
185
            get_str8(pb, s->copyright, sizeof(s->copyright));
186
            get_str8(pb, s->comment, sizeof(s->comment));
187
        }
188
    }
189
    return 0;
190
}
191

    
192
int
193
ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVStream *st)
194
{
195
    ByteIOContext *pb = s->pb;
196
    unsigned int v;
197
    int codec_data_size, size;
198
    int64_t codec_pos;
199

    
200
    codec_data_size = get_be32(pb);
201
    codec_pos = url_ftell(pb);
202
    v = get_be32(pb);
203
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
204
        /* ra type header */
205
        if (rm_read_audio_stream_info(s, st, 0))
206
            return -1;
207
    } else {
208
        int fps, fps2;
209
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
210
        fail1:
211
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
212
            goto skip;
213
        }
214
        st->codec->codec_tag = get_le32(pb);
215
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
216
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
217
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
218
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
219
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
220
            goto fail1;
221
        st->codec->width = get_be16(pb);
222
        st->codec->height = get_be16(pb);
223
        st->codec->time_base.num= 1;
224
        fps= get_be16(pb);
225
        st->codec->codec_type = CODEC_TYPE_VIDEO;
226
        get_be32(pb);
227
        fps2= get_be16(pb);
228
        get_be16(pb);
229

    
230
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
231

    
232
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
233
            //check is redundant as get_buffer() will catch this
234
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
235
            return -1;
236
        }
237
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
238
        if (!st->codec->extradata)
239
            return AVERROR(ENOMEM);
240
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
241

    
242
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
243
        st->codec->time_base.den = fps * st->codec->time_base.num;
244
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
245
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
246
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
247
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
248
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
249
        default: goto fail1;
250
        }
251
    }
252

    
253
skip:
254
    /* skip codec info */
255
    size = url_ftell(pb) - codec_pos;
256
    url_fskip(pb, codec_data_size - size);
257

    
258
    return 0;
259
}
260

    
261

    
262
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
263
{
264
    RMContext *rm = s->priv_data;
265
    AVStream *st;
266

    
267
    rm->old_format = 1;
268
    st = av_new_stream(s, 0);
269
    if (!st)
270
        return -1;
271
    return rm_read_audio_stream_info(s, st, 1);
272
}
273

    
274
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
275
{
276
    RMContext *rm = s->priv_data;
277
    AVStream *st;
278
    ByteIOContext *pb = s->pb;
279
    unsigned int tag;
280
    int tag_size;
281
    unsigned int start_time, duration;
282
    char buf[128];
283
    int flags = 0;
284

    
285
    tag = get_le32(pb);
286
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
287
        /* very old .ra format */
288
        return rm_read_header_old(s, ap);
289
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
290
        return AVERROR(EIO);
291
    }
292

    
293
    get_be32(pb); /* header size */
294
    get_be16(pb);
295
    get_be32(pb);
296
    get_be32(pb); /* number of headers */
297

    
298
    for(;;) {
299
        if (url_feof(pb))
300
            return -1;
301
        tag = get_le32(pb);
302
        tag_size = get_be32(pb);
303
        get_be16(pb);
304
#if 0
305
        printf("tag=%c%c%c%c (%08x) size=%d\n",
306
               (tag) & 0xff,
307
               (tag >> 8) & 0xff,
308
               (tag >> 16) & 0xff,
309
               (tag >> 24) & 0xff,
310
               tag,
311
               tag_size);
312
#endif
313
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
314
            return -1;
315
        switch(tag) {
316
        case MKTAG('P', 'R', 'O', 'P'):
317
            /* file header */
318
            get_be32(pb); /* max bit rate */
319
            get_be32(pb); /* avg bit rate */
320
            get_be32(pb); /* max packet size */
321
            get_be32(pb); /* avg packet size */
322
            get_be32(pb); /* nb packets */
323
            get_be32(pb); /* duration */
324
            get_be32(pb); /* preroll */
325
            get_be32(pb); /* index offset */
326
            get_be32(pb); /* data offset */
327
            get_be16(pb); /* nb streams */
328
            flags = get_be16(pb); /* flags */
329
            break;
330
        case MKTAG('C', 'O', 'N', 'T'):
331
            get_str16(pb, s->title, sizeof(s->title));
332
            get_str16(pb, s->author, sizeof(s->author));
333
            get_str16(pb, s->copyright, sizeof(s->copyright));
334
            get_str16(pb, s->comment, sizeof(s->comment));
335
            break;
336
        case MKTAG('M', 'D', 'P', 'R'):
337
            st = av_new_stream(s, 0);
338
            if (!st)
339
                return AVERROR(ENOMEM);
340
            st->id = get_be16(pb);
341
            get_be32(pb); /* max bit rate */
342
            st->codec->bit_rate = get_be32(pb); /* bit rate */
343
            get_be32(pb); /* max packet size */
344
            get_be32(pb); /* avg packet size */
345
            start_time = get_be32(pb); /* start time */
346
            get_be32(pb); /* preroll */
347
            duration = get_be32(pb); /* duration */
348
            st->start_time = start_time;
349
            st->duration = duration;
350
            get_str8(pb, buf, sizeof(buf)); /* desc */
351
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
352
            st->codec->codec_type = CODEC_TYPE_DATA;
353
            av_set_pts_info(st, 64, 1, 1000);
354
            if (ff_rm_read_mdpr_codecdata(s, st) < 0)
355
                return -1;
356
            break;
357
        case MKTAG('D', 'A', 'T', 'A'):
358
            goto header_end;
359
        default:
360
            /* unknown tag: skip it */
361
            url_fskip(pb, tag_size - 10);
362
            break;
363
        }
364
    }
365
 header_end:
366
    rm->nb_packets = get_be32(pb); /* number of packets */
367
    if (!rm->nb_packets && (flags & 4))
368
        rm->nb_packets = 3600 * 25;
369
    get_be32(pb); /* next data header */
370
    rm->curpic_num = -1;
371
    return 0;
372
}
373

    
374
static int get_num(ByteIOContext *pb, int *len)
375
{
376
    int n, n1;
377

    
378
    n = get_be16(pb);
379
    (*len)-=2;
380
    n &= 0x7FFF;
381
    if (n >= 0x4000) {
382
        return n - 0x4000;
383
    } else {
384
        n1 = get_be16(pb);
385
        (*len)-=2;
386
        return (n << 16) | n1;
387
    }
388
}
389

    
390
/* multiple of 20 bytes for ra144 (ugly) */
391
#define RAW_PACKET_SIZE 1000
392

    
393
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
394
    RMContext *rm = s->priv_data;
395
    ByteIOContext *pb = s->pb;
396
    int len, num, res, i;
397
    AVStream *st;
398
    uint32_t state=0xFFFFFFFF;
399

    
400
    while(!url_feof(pb)){
401
        *pos= url_ftell(pb) - 3;
402
        if(rm->remaining_len > 0){
403
            num= rm->current_stream;
404
            len= rm->remaining_len;
405
            *timestamp = AV_NOPTS_VALUE;
406
            *flags= 0;
407
        }else{
408
            state= (state<<8) + get_byte(pb);
409

    
410
            if(state == MKBETAG('I', 'N', 'D', 'X')){
411
                len = get_be16(pb) - 6;
412
                if(len<0)
413
                    continue;
414
                goto skip;
415
            }
416

    
417
            if(state > (unsigned)0xFFFF || state < 12)
418
                continue;
419
            len=state;
420
            state= 0xFFFFFFFF;
421

    
422
            num = get_be16(pb);
423
            *timestamp = get_be32(pb);
424
            res= get_byte(pb); /* reserved */
425
            *flags = get_byte(pb); /* flags */
426

    
427

    
428
            len -= 12;
429
        }
430
        for(i=0;i<s->nb_streams;i++) {
431
            st = s->streams[i];
432
            if (num == st->id)
433
                break;
434
        }
435
        if (i == s->nb_streams) {
436
skip:
437
            /* skip packet if unknown number */
438
            url_fskip(pb, len);
439
            rm->remaining_len -= len;
440
            continue;
441
        }
442
        *stream_index= i;
443

    
444
        return len;
445
    }
446
    return -1;
447
}
448

    
449
static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *pkt, int len)
450
{
451
    ByteIOContext *pb = s->pb;
452
    int hdr, seq, pic_num, len2, pos;
453
    int type;
454

    
455
    hdr = get_byte(pb); len--;
456
    type = hdr >> 6;
457
    switch(type){
458
    case 0: // slice
459
    case 2: // last slice
460
        seq = get_byte(pb); len--;
461
        len2 = get_num(pb, &len);
462
        pos = get_num(pb, &len);
463
        pic_num = get_byte(pb); len--;
464
        rm->remaining_len = len;
465
        break;
466
    case 1: //whole frame
467
        seq = get_byte(pb); len--;
468
        if(av_new_packet(pkt, len + 9) < 0)
469
            return AVERROR(EIO);
470
        pkt->data[0] = 0;
471
        AV_WL32(pkt->data + 1, 1);
472
        AV_WL32(pkt->data + 5, 0);
473
        get_buffer(pb, pkt->data + 9, len);
474
        rm->remaining_len = 0;
475
        return 0;
476
    case 3: //frame as a part of packet
477
        len2 = get_num(pb, &len);
478
        pos = get_num(pb, &len);
479
        pic_num = get_byte(pb); len--;
480
        rm->remaining_len = len - len2;
481
        if(av_new_packet(pkt, len2 + 9) < 0)
482
            return AVERROR(EIO);
483
        pkt->data[0] = 0;
484
        AV_WL32(pkt->data + 1, 1);
485
        AV_WL32(pkt->data + 5, 0);
486
        get_buffer(pb, pkt->data + 9, len2);
487
        return 0;
488
    }
489
    //now we have to deal with single slice
490

    
491
    if((seq & 0x7F) == 1 || rm->curpic_num != pic_num){
492
        rm->slices = ((hdr & 0x3F) << 1) + 1;
493
        rm->videobufsize = len2 + 8*rm->slices + 1;
494
        av_free(rm->videobuf);
495
        if(!(rm->videobuf = av_malloc(rm->videobufsize)))
496
            return AVERROR(ENOMEM);
497
        rm->videobufpos = 8*rm->slices + 1;
498
        rm->cur_slice = 0;
499
        rm->curpic_num = pic_num;
500
        rm->pktpos = url_ftell(pb);
501
    }
502
    if(type == 2)
503
        len = FFMIN(len, pos);
504

    
505
    if(++rm->cur_slice > rm->slices)
506
        return 1;
507
    AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
508
    AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
509
    if(rm->videobufpos + len > rm->videobufsize)
510
        return 1;
511
    if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)
512
        return AVERROR(EIO);
513
    rm->videobufpos += len;
514
    rm->remaining_len-= len;
515

    
516
    if(type == 2 || (rm->videobufpos) == rm->videobufsize){
517
         rm->videobuf[0] = rm->cur_slice-1;
518
         if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)
519
             return AVERROR(ENOMEM);
520
         memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);
521
         memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,
522
                rm->videobufpos - 1 - 8*rm->slices);
523
         pkt->pts = AV_NOPTS_VALUE;
524
         pkt->pos = rm->pktpos;
525
         return 0;
526
    }
527

    
528
    return 1;
529
}
530

    
531
static inline void
532
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
533
{
534
    uint8_t *ptr;
535
    int j;
536

    
537
    if (st->codec->codec_id == CODEC_ID_AC3) {
538
        ptr = pkt->data;
539
        for (j=0;j<pkt->size;j+=2) {
540
            FFSWAP(int, ptr[0], ptr[1]);
541
            ptr += 2;
542
        }
543
    }
544
}
545

    
546
int
547
ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,
548
                    int *seq, int *flags, int64_t *timestamp)
549
{
550
    ByteIOContext *pb = s->pb;
551
    RMContext *rm = s->priv_data;
552

    
553
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
554
        rm->current_stream= st->id;
555
        if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
556
            return -1; //got partial frame
557
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
558
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
559
            (st->codec->codec_id == CODEC_ID_COOK) ||
560
            (st->codec->codec_id == CODEC_ID_ATRAC3)) {
561
            int x;
562
            int sps = rm->sub_packet_size;
563
            int cfs = rm->coded_framesize;
564
            int h = rm->sub_packet_h;
565
            int y = rm->sub_packet_cnt;
566
            int w = rm->audio_framesize;
567

    
568
            if (*flags & 2)
569
                y = rm->sub_packet_cnt = 0;
570
            if (!y)
571
                rm->audiotimestamp = *timestamp;
572

    
573
            switch(st->codec->codec_id) {
574
                case CODEC_ID_RA_288:
575
                    for (x = 0; x < h/2; x++)
576
                        get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
577
                    break;
578
                case CODEC_ID_ATRAC3:
579
                case CODEC_ID_COOK:
580
                    for (x = 0; x < w/sps; x++)
581
                        get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
582
                    break;
583
            }
584

    
585
            if (++(rm->sub_packet_cnt) < h)
586
                return -1;
587
            else {
588
                rm->sub_packet_cnt = 0;
589
                rm->audio_stream_num = st->index;
590
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
591
                // Release first audio packet
592
                av_new_packet(pkt, st->codec->block_align);
593
                memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
594
                *timestamp = rm->audiotimestamp;
595
                *flags = 2; // Mark first packet as keyframe
596
            }
597
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
598
            int x;
599
            rm->audio_stream_num = st->index;
600
            rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
601
            if (rm->sub_packet_cnt) {
602
                for (x = 0; x < rm->sub_packet_cnt; x++)
603
                    rm->sub_packet_lengths[x] = get_be16(pb);
604
                // Release first audio packet
605
                rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
606
                av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
607
                *flags = 2; // Mark first packet as keyframe
608
            }
609
        } else {
610
            av_get_packet(pb, pkt, len);
611
            rm_ac3_swap_bytes(st, pkt);
612
        }
613
    } else
614
        av_get_packet(pb, pkt, len);
615

    
616
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
617
       || st->discard >= AVDISCARD_ALL){
618
        av_free_packet(pkt);
619
        return -1;
620
    }
621

    
622
    pkt->stream_index = st->index;
623

    
624
#if 0
625
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
626
        if(st->codec->codec_id == CODEC_ID_RV20){
627
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
628
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
629

630
            seq |= (*timestamp&~0x3FFF);
631
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
632
            if(seq - *timestamp < -0x2000) seq += 0x4000;
633
        }
634
    }
635
#endif
636

    
637
    pkt->pts= *timestamp;
638
    if (*flags & 2)
639
        pkt->flags |= PKT_FLAG_KEY;
640

    
641
    return 0;
642
}
643

    
644
void
645
ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt)
646
{
647
    ByteIOContext *pb = s->pb;
648
    RMContext *rm = s->priv_data;
649

    
650
    assert (rm->audio_pkt_cnt > 0);
651

    
652
    if (st->codec->codec_id == CODEC_ID_AAC)
653
        av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
654
    else {
655
        av_new_packet(pkt, st->codec->block_align);
656
        memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
657
               (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
658
               st->codec->block_align);
659
    }
660
    rm->audio_pkt_cnt--;
661
    pkt->flags = 0;
662
    pkt->stream_index = st->index;
663
}
664

    
665
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
666
{
667
    RMContext *rm = s->priv_data;
668
    ByteIOContext *pb = s->pb;
669
    AVStream *st;
670
    int i, len;
671
    int64_t timestamp, pos;
672
    int flags;
673

    
674
    if (rm->audio_pkt_cnt) {
675
        // If there are queued audio packet return them first
676
        st = s->streams[rm->audio_stream_num];
677
        ff_rm_retrieve_cache(s, st, pkt);
678
    } else if (rm->old_format) {
679
        st = s->streams[0];
680
        if (st->codec->codec_id == CODEC_ID_RA_288) {
681
            int x, y;
682

    
683
            for (y = 0; y < rm->sub_packet_h; y++)
684
                for (x = 0; x < rm->sub_packet_h/2; x++)
685
                    if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
686
                        return AVERROR(EIO);
687
            rm->audio_stream_num = 0;
688
            rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
689
            // Release first audio packet
690
            av_new_packet(pkt, st->codec->block_align);
691
            memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
692
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
693
            pkt->stream_index = 0;
694
        } else {
695
            /* just read raw bytes */
696
            len = RAW_PACKET_SIZE;
697
            len= av_get_packet(pb, pkt, len);
698
            pkt->stream_index = 0;
699
            if (len <= 0) {
700
                return AVERROR(EIO);
701
            }
702
            pkt->size = len;
703
        }
704
        rm_ac3_swap_bytes(st, pkt);
705
    } else {
706
        int seq=1;
707
resync:
708
        len=sync(s, &timestamp, &flags, &i, &pos);
709
        if(len<0)
710
            return AVERROR(EIO);
711
        st = s->streams[i];
712

    
713
        if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, &timestamp) < 0)
714
            goto resync;
715

    
716
        if((flags&2) && (seq&0x7F) == 1)
717
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
718
    }
719

    
720
    return 0;
721
}
722

    
723
static int rm_read_close(AVFormatContext *s)
724
{
725
    RMContext *rm = s->priv_data;
726

    
727
    av_free(rm->audiobuf);
728
    av_free(rm->videobuf);
729
    return 0;
730
}
731

    
732
static int rm_probe(AVProbeData *p)
733
{
734
    /* check file header */
735
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
736
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
737
         p->buf[4] == 0 && p->buf[5] == 0) ||
738
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
739
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
740
        return AVPROBE_SCORE_MAX;
741
    else
742
        return 0;
743
}
744

    
745
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
746
                               int64_t *ppos, int64_t pos_limit)
747
{
748
    RMContext *rm = s->priv_data;
749
    int64_t pos, dts;
750
    int stream_index2, flags, len, h;
751

    
752
    pos = *ppos;
753

    
754
    if(rm->old_format)
755
        return AV_NOPTS_VALUE;
756

    
757
    url_fseek(s->pb, pos, SEEK_SET);
758
    rm->remaining_len=0;
759
    for(;;){
760
        int seq=1;
761
        AVStream *st;
762

    
763
        len=sync(s, &dts, &flags, &stream_index2, &pos);
764
        if(len<0)
765
            return AV_NOPTS_VALUE;
766

    
767
        st = s->streams[stream_index2];
768
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
769
            h= get_byte(s->pb); len--;
770
            if(!(h & 0x40)){
771
                seq = get_byte(s->pb); len--;
772
            }
773
        }
774

    
775
        if((flags&2) && (seq&0x7F) == 1){
776
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
777
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
778
            if(stream_index2 == stream_index)
779
                break;
780
        }
781

    
782
        url_fskip(s->pb, len);
783
    }
784
    *ppos = pos;
785
    return dts;
786
}
787

    
788
AVInputFormat rm_demuxer = {
789
    "rm",
790
    NULL_IF_CONFIG_SMALL("RM format"),
791
    sizeof(RMContext),
792
    rm_probe,
793
    rm_read_header,
794
    rm_read_packet,
795
    rm_read_close,
796
    NULL,
797
    rm_read_dts,
798
};