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ffmpeg / libavformat / rmdec.c @ 890d2799

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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
#include "avformat.h"
22
#include "rm.h"
23
#include "avstring.h"
24

    
25
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
26
{
27
    int i;
28
    char *q, r;
29

    
30
    q = buf;
31
    for(i=0;i<len;i++) {
32
        r = get_byte(pb);
33
        if (i < buf_size - 1)
34
            *q++ = r;
35
    }
36
    if (buf_size > 0) *q = '\0';
37
}
38

    
39
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
40
{
41
    get_strl(pb, buf, buf_size, get_be16(pb));
42
}
43

    
44
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
45
{
46
    get_strl(pb, buf, buf_size, get_byte(pb));
47
}
48

    
49
static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
50
                                      int read_all)
51
{
52
    RMContext *rm = s->priv_data;
53
    ByteIOContext *pb = s->pb;
54
    char buf[256];
55
    uint32_t version;
56
    int i;
57

    
58
    /* ra type header */
59
    version = get_be32(pb); /* version */
60
    if (((version >> 16) & 0xff) == 3) {
61
        int64_t startpos = url_ftell(pb);
62
        /* very old version */
63
        for(i = 0; i < 14; i++)
64
            get_byte(pb);
65
        get_str8(pb, s->title, sizeof(s->title));
66
        get_str8(pb, s->author, sizeof(s->author));
67
        get_str8(pb, s->copyright, sizeof(s->copyright));
68
        get_str8(pb, s->comment, sizeof(s->comment));
69
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
70
        // fourcc (should always be "lpcJ")
71
        get_byte(pb);
72
        get_str8(pb, buf, sizeof(buf));
73
        }
74
        // Skip extra header crap (this should never happen)
75
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
76
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
77
        st->codec->sample_rate = 8000;
78
        st->codec->channels = 1;
79
        st->codec->codec_type = CODEC_TYPE_AUDIO;
80
        st->codec->codec_id = CODEC_ID_RA_144;
81
    } else {
82
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
83
        /* old version (4) */
84
        get_be32(pb); /* .ra4 */
85
        get_be32(pb); /* data size */
86
        get_be16(pb); /* version2 */
87
        get_be32(pb); /* header size */
88
        flavor= get_be16(pb); /* add codec info / flavor */
89
        rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
90
        get_be32(pb); /* ??? */
91
        get_be32(pb); /* ??? */
92
        get_be32(pb); /* ??? */
93
        rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
94
        st->codec->block_align= get_be16(pb); /* frame size */
95
        rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
96
        get_be16(pb); /* ??? */
97
        if (((version >> 16) & 0xff) == 5) {
98
            get_be16(pb); get_be16(pb); get_be16(pb); }
99
        st->codec->sample_rate = get_be16(pb);
100
        get_be32(pb);
101
        st->codec->channels = get_be16(pb);
102
        if (((version >> 16) & 0xff) == 5) {
103
            get_be32(pb);
104
            buf[0] = get_byte(pb);
105
            buf[1] = get_byte(pb);
106
            buf[2] = get_byte(pb);
107
            buf[3] = get_byte(pb);
108
            buf[4] = 0;
109
        } else {
110
            get_str8(pb, buf, sizeof(buf)); /* desc */
111
            get_str8(pb, buf, sizeof(buf)); /* desc */
112
        }
113
        st->codec->codec_type = CODEC_TYPE_AUDIO;
114
        if (!strcmp(buf, "dnet")) {
115
            st->codec->codec_id = CODEC_ID_AC3;
116
            st->need_parsing = AVSTREAM_PARSE_FULL;
117
        } else if (!strcmp(buf, "28_8")) {
118
            st->codec->codec_id = CODEC_ID_RA_288;
119
            st->codec->extradata_size= 0;
120
            rm->audio_framesize = st->codec->block_align;
121
            st->codec->block_align = coded_framesize;
122

    
123
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
124
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
125
                return -1;
126
            }
127

    
128
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
129
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
130
            int codecdata_length, i;
131
            get_be16(pb); get_byte(pb);
132
            if (((version >> 16) & 0xff) == 5)
133
                get_byte(pb);
134
            codecdata_length = get_be32(pb);
135
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
136
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
137
                return -1;
138
            }
139

    
140
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
141
            else st->codec->codec_id = CODEC_ID_ATRAC3;
142
            st->codec->extradata_size= codecdata_length;
143
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
144
            for(i = 0; i < codecdata_length; i++)
145
                ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
146
            rm->audio_framesize = st->codec->block_align;
147
            st->codec->block_align = rm->sub_packet_size;
148

    
149
            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
150
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
151
                return -1;
152
            }
153

    
154
            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
155
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
156
            int codecdata_length, i;
157
            get_be16(pb); get_byte(pb);
158
            if (((version >> 16) & 0xff) == 5)
159
                get_byte(pb);
160
            st->codec->codec_id = CODEC_ID_AAC;
161
            codecdata_length = get_be32(pb);
162
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
163
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
164
                return -1;
165
            }
166
            if (codecdata_length >= 1) {
167
                st->codec->extradata_size = codecdata_length - 1;
168
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
169
                get_byte(pb);
170
                for(i = 0; i < st->codec->extradata_size; i++)
171
                    ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
172
            }
173
        } else {
174
            st->codec->codec_id = CODEC_ID_NONE;
175
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
176
        }
177
        if (read_all) {
178
            get_byte(pb);
179
            get_byte(pb);
180
            get_byte(pb);
181

    
182
            get_str8(pb, s->title, sizeof(s->title));
183
            get_str8(pb, s->author, sizeof(s->author));
184
            get_str8(pb, s->copyright, sizeof(s->copyright));
185
            get_str8(pb, s->comment, sizeof(s->comment));
186
        }
187
    }
188
    return 0;
189
}
190

    
191
static int
192
ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVStream *st)
193
{
194
    ByteIOContext *pb = s->pb;
195
    unsigned int v;
196
    int codec_data_size, size;
197
    int64_t codec_pos;
198

    
199
    codec_data_size = get_be32(pb);
200
    codec_pos = url_ftell(pb);
201
    v = get_be32(pb);
202
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
203
        /* ra type header */
204
        if (rm_read_audio_stream_info(s, st, 0))
205
            return -1;
206
    } else {
207
        int fps, fps2;
208
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
209
        fail1:
210
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
211
            goto skip;
212
        }
213
        st->codec->codec_tag = get_le32(pb);
214
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
215
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
216
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
217
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
218
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
219
            goto fail1;
220
        st->codec->width = get_be16(pb);
221
        st->codec->height = get_be16(pb);
222
        st->codec->time_base.num= 1;
223
        fps= get_be16(pb);
224
        st->codec->codec_type = CODEC_TYPE_VIDEO;
225
        get_be32(pb);
226
        fps2= get_be16(pb);
227
        get_be16(pb);
228

    
229
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
230

    
231
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
232
            //check is redundant as get_buffer() will catch this
233
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
234
            return -1;
235
        }
236
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
237
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
238

    
239
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
240
        st->codec->time_base.den = fps * st->codec->time_base.num;
241
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
242
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
243
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
244
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
245
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
246
        default: goto fail1;
247
        }
248
    }
249

    
250
skip:
251
    /* skip codec info */
252
    size = url_ftell(pb) - codec_pos;
253
    url_fskip(pb, codec_data_size - size);
254

    
255
    return 0;
256
}
257

    
258

    
259
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
260
{
261
    RMContext *rm = s->priv_data;
262
    AVStream *st;
263

    
264
    rm->old_format = 1;
265
    st = av_new_stream(s, 0);
266
    if (!st)
267
        return -1;
268
    return rm_read_audio_stream_info(s, st, 1);
269
}
270

    
271
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
272
{
273
    RMContext *rm = s->priv_data;
274
    AVStream *st;
275
    ByteIOContext *pb = s->pb;
276
    unsigned int tag;
277
    int tag_size, i;
278
    unsigned int start_time, duration;
279
    char buf[128];
280
    int flags = 0;
281

    
282
    tag = get_le32(pb);
283
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
284
        /* very old .ra format */
285
        return rm_read_header_old(s, ap);
286
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
287
        return AVERROR(EIO);
288
    }
289

    
290
    get_be32(pb); /* header size */
291
    get_be16(pb);
292
    get_be32(pb);
293
    get_be32(pb); /* number of headers */
294

    
295
    for(;;) {
296
        if (url_feof(pb))
297
            goto fail;
298
        tag = get_le32(pb);
299
        tag_size = get_be32(pb);
300
        get_be16(pb);
301
#if 0
302
        printf("tag=%c%c%c%c (%08x) size=%d\n",
303
               (tag) & 0xff,
304
               (tag >> 8) & 0xff,
305
               (tag >> 16) & 0xff,
306
               (tag >> 24) & 0xff,
307
               tag,
308
               tag_size);
309
#endif
310
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
311
            goto fail;
312
        switch(tag) {
313
        case MKTAG('P', 'R', 'O', 'P'):
314
            /* file header */
315
            get_be32(pb); /* max bit rate */
316
            get_be32(pb); /* avg bit rate */
317
            get_be32(pb); /* max packet size */
318
            get_be32(pb); /* avg packet size */
319
            get_be32(pb); /* nb packets */
320
            get_be32(pb); /* duration */
321
            get_be32(pb); /* preroll */
322
            get_be32(pb); /* index offset */
323
            get_be32(pb); /* data offset */
324
            get_be16(pb); /* nb streams */
325
            flags = get_be16(pb); /* flags */
326
            break;
327
        case MKTAG('C', 'O', 'N', 'T'):
328
            get_str16(pb, s->title, sizeof(s->title));
329
            get_str16(pb, s->author, sizeof(s->author));
330
            get_str16(pb, s->copyright, sizeof(s->copyright));
331
            get_str16(pb, s->comment, sizeof(s->comment));
332
            break;
333
        case MKTAG('M', 'D', 'P', 'R'):
334
            st = av_new_stream(s, 0);
335
            if (!st)
336
                goto fail;
337
            st->id = get_be16(pb);
338
            get_be32(pb); /* max bit rate */
339
            st->codec->bit_rate = get_be32(pb); /* bit rate */
340
            get_be32(pb); /* max packet size */
341
            get_be32(pb); /* avg packet size */
342
            start_time = get_be32(pb); /* start time */
343
            get_be32(pb); /* preroll */
344
            duration = get_be32(pb); /* duration */
345
            st->start_time = start_time;
346
            st->duration = duration;
347
            get_str8(pb, buf, sizeof(buf)); /* desc */
348
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
349
            st->codec->codec_type = CODEC_TYPE_DATA;
350
            av_set_pts_info(st, 64, 1, 1000);
351
            if (ff_rm_read_mdpr_codecdata(s, st) < 0)
352
                return -1;
353
            break;
354
        case MKTAG('D', 'A', 'T', 'A'):
355
            goto header_end;
356
        default:
357
            /* unknown tag: skip it */
358
            url_fskip(pb, tag_size - 10);
359
            break;
360
        }
361
    }
362
 header_end:
363
    rm->nb_packets = get_be32(pb); /* number of packets */
364
    if (!rm->nb_packets && (flags & 4))
365
        rm->nb_packets = 3600 * 25;
366
    get_be32(pb); /* next data header */
367
    rm->curpic_num = -1;
368
    return 0;
369

    
370
 fail:
371
    for(i=0;i<s->nb_streams;i++) {
372
        av_free(s->streams[i]);
373
    }
374
    return AVERROR(EIO);
375
}
376

    
377
static int get_num(ByteIOContext *pb, int *len)
378
{
379
    int n, n1;
380

    
381
    n = get_be16(pb);
382
    (*len)-=2;
383
    n &= 0x7FFF;
384
    if (n >= 0x4000) {
385
        return n - 0x4000;
386
    } else {
387
        n1 = get_be16(pb);
388
        (*len)-=2;
389
        return (n << 16) | n1;
390
    }
391
}
392

    
393
/* multiple of 20 bytes for ra144 (ugly) */
394
#define RAW_PACKET_SIZE 1000
395

    
396
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
397
    RMContext *rm = s->priv_data;
398
    ByteIOContext *pb = s->pb;
399
    int len, num, res, i;
400
    AVStream *st;
401
    uint32_t state=0xFFFFFFFF;
402

    
403
    while(!url_feof(pb)){
404
        *pos= url_ftell(pb);
405
        if(rm->remaining_len > 0){
406
            num= rm->current_stream;
407
            len= rm->remaining_len;
408
            *timestamp = AV_NOPTS_VALUE;
409
            *flags= 0;
410
        }else{
411
            state= (state<<8) + get_byte(pb);
412

    
413
            if(state == MKBETAG('I', 'N', 'D', 'X')){
414
                len = get_be16(pb) - 6;
415
                if(len<0)
416
                    continue;
417
                goto skip;
418
            }
419

    
420
            if(state > (unsigned)0xFFFF || state < 12)
421
                continue;
422
            len=state;
423
            state= 0xFFFFFFFF;
424

    
425
            num = get_be16(pb);
426
            *timestamp = get_be32(pb);
427
            res= get_byte(pb); /* reserved */
428
            *flags = get_byte(pb); /* flags */
429

    
430

    
431
            len -= 12;
432
        }
433
        for(i=0;i<s->nb_streams;i++) {
434
            st = s->streams[i];
435
            if (num == st->id)
436
                break;
437
        }
438
        if (i == s->nb_streams) {
439
skip:
440
            /* skip packet if unknown number */
441
            url_fskip(pb, len);
442
            rm->remaining_len -= len;
443
            continue;
444
        }
445
        *stream_index= i;
446

    
447
        return len;
448
    }
449
    return -1;
450
}
451

    
452
static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *pkt, int len)
453
{
454
    ByteIOContext *pb = s->pb;
455
    int hdr, seq, pic_num, len2, pos;
456
    int type;
457

    
458
    hdr = get_byte(pb); len--;
459
    type = hdr >> 6;
460
    switch(type){
461
    case 0: // slice
462
    case 2: // last slice
463
        seq = get_byte(pb); len--;
464
        len2 = get_num(pb, &len);
465
        pos = get_num(pb, &len);
466
        pic_num = get_byte(pb); len--;
467
        rm->remaining_len = len;
468
        break;
469
    case 1: //whole frame
470
        seq = get_byte(pb); len--;
471
        if(av_new_packet(pkt, len + 9) < 0)
472
            return AVERROR(EIO);
473
        pkt->data[0] = 0;
474
        AV_WL32(pkt->data + 1, 1);
475
        AV_WL32(pkt->data + 5, 0);
476
        get_buffer(pb, pkt->data + 9, len);
477
        rm->remaining_len = 0;
478
        return 0;
479
    case 3: //frame as a part of packet
480
        len2 = get_num(pb, &len);
481
        pos = get_num(pb, &len);
482
        pic_num = get_byte(pb); len--;
483
        rm->remaining_len = len - len2;
484
        if(av_new_packet(pkt, len2 + 9) < 0)
485
            return AVERROR(EIO);
486
        pkt->data[0] = 0;
487
        AV_WL32(pkt->data + 1, 1);
488
        AV_WL32(pkt->data + 5, 0);
489
        get_buffer(pb, pkt->data + 9, len2);
490
        return 0;
491
    }
492
    //now we have to deal with single slice
493

    
494
    if((seq & 0x7F) == 1 || rm->curpic_num != pic_num){
495
        rm->slices = ((hdr & 0x3F) << 1) + 1;
496
        rm->videobufsize = len2 + 8*rm->slices + 1;
497
        av_free(rm->videobuf);
498
        if(!(rm->videobuf = av_malloc(rm->videobufsize)))
499
            return AVERROR(ENOMEM);
500
        rm->videobufpos = 8*rm->slices + 1;
501
        rm->cur_slice = 0;
502
        rm->curpic_num = pic_num;
503
        rm->pktpos = url_ftell(pb);
504
    }
505
    if(type == 2)
506
        len = FFMIN(len, pos);
507

    
508
    if(++rm->cur_slice > rm->slices)
509
        return 1;
510
    AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
511
    AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
512
    if(rm->videobufpos + len > rm->videobufsize)
513
        return 1;
514
    if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)
515
        return AVERROR(EIO);
516
    rm->videobufpos += len,
517
    rm->remaining_len-= len;
518

    
519
    if(type == 2 || (rm->videobufpos) == rm->videobufsize){
520
         rm->videobuf[0] = rm->cur_slice-1;
521
         if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)
522
             return AVERROR(ENOMEM);
523
         memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);
524
         memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,
525
                rm->videobufpos - 1 - 8*rm->slices);
526
         pkt->pts = AV_NOPTS_VALUE;
527
         pkt->pos = rm->pktpos;
528
         return 0;
529
    }
530

    
531
    return 1;
532
}
533

    
534
static inline void
535
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
536
{
537
    uint8_t *ptr;
538
    int j;
539

    
540
    if (st->codec->codec_id == CODEC_ID_AC3) {
541
        ptr = pkt->data;
542
        for (j=0;j<pkt->size;j+=2) {
543
            FFSWAP(int, ptr[0], ptr[1]);
544
            ptr += 2;
545
        }
546
    }
547
}
548

    
549
static int
550
ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,
551
                    int *seq, int *flags, int64_t *timestamp)
552
{
553
    ByteIOContext *pb = s->pb;
554
    RMContext *rm = s->priv_data;
555

    
556
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
557
        rm->current_stream= st->id;
558
        if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
559
            return -1; //got partial frame
560
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
561
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
562
            (st->codec->codec_id == CODEC_ID_COOK) ||
563
            (st->codec->codec_id == CODEC_ID_ATRAC3)) {
564
            int x;
565
            int sps = rm->sub_packet_size;
566
            int cfs = rm->coded_framesize;
567
            int h = rm->sub_packet_h;
568
            int y = rm->sub_packet_cnt;
569
            int w = rm->audio_framesize;
570

    
571
            if (*flags & 2)
572
                y = rm->sub_packet_cnt = 0;
573
            if (!y)
574
                rm->audiotimestamp = *timestamp;
575

    
576
            switch(st->codec->codec_id) {
577
                case CODEC_ID_RA_288:
578
                    for (x = 0; x < h/2; x++)
579
                        get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
580
                    break;
581
                case CODEC_ID_ATRAC3:
582
                case CODEC_ID_COOK:
583
                    for (x = 0; x < w/sps; x++)
584
                        get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
585
                    break;
586
            }
587

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

    
616
    } else
617
        av_get_packet(pb, pkt, len);
618

    
619
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
620
       || st->discard >= AVDISCARD_ALL){
621
        av_free_packet(pkt);
622
        return -1;
623
    }
624

    
625
    pkt->stream_index = st->index;
626

    
627
#if 0
628
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
629
        if(st->codec->codec_id == CODEC_ID_RV20){
630
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
631
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
632

633
            seq |= (*timestamp&~0x3FFF);
634
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
635
            if(seq - *timestamp < -0x2000) seq += 0x4000;
636
        }
637
    }
638
#endif
639

    
640
    pkt->pts= *timestamp;
641
    if (*flags & 2)
642
        pkt->flags |= PKT_FLAG_KEY;
643

    
644
    return 0;
645
}
646

    
647
static void
648
ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt)
649
{
650
    ByteIOContext *pb = s->pb;
651
    RMContext *rm = s->priv_data;
652

    
653
    assert (rm->audio_pkt_cnt > 0);
654

    
655
    if (st->codec->codec_id == CODEC_ID_AAC)
656
        av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
657
    else {
658
        av_new_packet(pkt, st->codec->block_align);
659
        memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
660
               (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
661
               st->codec->block_align);
662
    }
663
    rm->audio_pkt_cnt--;
664
    pkt->flags = 0;
665
    pkt->stream_index = st->index;
666
}
667

    
668
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
669
{
670
    RMContext *rm = s->priv_data;
671
    ByteIOContext *pb = s->pb;
672
    AVStream *st;
673
    int i, len;
674
    int64_t timestamp, pos;
675
    int flags;
676

    
677
    if (rm->audio_pkt_cnt) {
678
        // If there are queued audio packet return them first
679
        st = s->streams[rm->audio_stream_num];
680
        ff_rm_retrieve_cache(s, st, pkt);
681
    } else if (rm->old_format) {
682
        st = s->streams[0];
683
        if (st->codec->codec_id == CODEC_ID_RA_288) {
684
            int x, y;
685

    
686
            for (y = 0; y < rm->sub_packet_h; y++)
687
                for (x = 0; x < rm->sub_packet_h/2; x++)
688
                    if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
689
                        return AVERROR(EIO);
690
            rm->audio_stream_num = 0;
691
            rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
692
            // Release first audio packet
693
            av_new_packet(pkt, st->codec->block_align);
694
            memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
695
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
696
            pkt->stream_index = 0;
697
        } else {
698
            /* just read raw bytes */
699
            len = RAW_PACKET_SIZE;
700
            len= av_get_packet(pb, pkt, len);
701
            pkt->stream_index = 0;
702
            if (len <= 0) {
703
                return AVERROR(EIO);
704
            }
705
            pkt->size = len;
706
        }
707
        rm_ac3_swap_bytes(st, pkt);
708
    } else {
709
        int seq=1;
710
resync:
711
        len=sync(s, &timestamp, &flags, &i, &pos);
712
        if(len<0)
713
            return AVERROR(EIO);
714
        st = s->streams[i];
715

    
716
        if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, &timestamp) < 0)
717
            goto resync;
718

    
719
        if(flags&2){
720
            if((seq&0x7F) == 1)
721
                av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
722
        }
723
    }
724

    
725
    return 0;
726
}
727

    
728
static int rm_read_close(AVFormatContext *s)
729
{
730
    RMContext *rm = s->priv_data;
731

    
732
    av_free(rm->audiobuf);
733
    av_free(rm->videobuf);
734
    return 0;
735
}
736

    
737
static int rm_probe(AVProbeData *p)
738
{
739
    /* check file header */
740
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
741
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
742
         p->buf[4] == 0 && p->buf[5] == 0) ||
743
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
744
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
745
        return AVPROBE_SCORE_MAX;
746
    else
747
        return 0;
748
}
749

    
750
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
751
                               int64_t *ppos, int64_t pos_limit)
752
{
753
    RMContext *rm = s->priv_data;
754
    int64_t pos, dts;
755
    int stream_index2, flags, len, h;
756

    
757
    pos = *ppos;
758

    
759
    if(rm->old_format)
760
        return AV_NOPTS_VALUE;
761

    
762
    url_fseek(s->pb, pos, SEEK_SET);
763
    rm->remaining_len=0;
764
    for(;;){
765
        int seq=1;
766
        AVStream *st;
767

    
768
        len=sync(s, &dts, &flags, &stream_index2, &pos);
769
        if(len<0)
770
            return AV_NOPTS_VALUE;
771

    
772
        st = s->streams[stream_index2];
773
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
774
            h= get_byte(s->pb); len--;
775
            if(!(h & 0x40)){
776
                seq = get_byte(s->pb); len--;
777
            }
778
        }
779

    
780
        if((flags&2) && (seq&0x7F) == 1){
781
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
782
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
783
            if(stream_index2 == stream_index)
784
                break;
785
        }
786

    
787
        url_fskip(s->pb, len);
788
    }
789
    *ppos = pos;
790
    return dts;
791
}
792

    
793
AVInputFormat rm_demuxer = {
794
    "rm",
795
    "rm format",
796
    sizeof(RMContext),
797
    rm_probe,
798
    rm_read_header,
799
    rm_read_packet,
800
    rm_read_close,
801
    NULL,
802
    rm_read_dts,
803
};