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ffmpeg / libavformat / rmdec.c @ fce48f5b

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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
struct RMStream {
27
    uint8_t *buf; ///< place to store merged video frame / reordered audio data
28
    int videobufsize;  ///< current assembled frame size
29
    int videobufpos;   ///< position for the next slice in the video buffer
30
    int curpic_num;    ///< picture number of current frame
31
    int cur_slice, slices;
32
    int64_t pktpos;    ///< first slice position in file
33
    /// Audio descrambling matrix parameters
34
    int64_t audiotimestamp; ///< Audio packet timestamp
35
    int sub_packet_cnt; // Subpacket counter, used while reading
36
    int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
37
    int audio_framesize; /// Audio frame size from container
38
    int sub_packet_lengths[16]; /// Length of each subpacket
39
};
40

    
41
typedef struct {
42
    int nb_packets;
43
    int old_format;
44
    int current_stream;
45
    int remaining_len;
46
    int audio_stream_num; ///< Stream number for audio packets
47
    int audio_pkt_cnt; ///< Output packet counter
48
} RMDemuxContext;
49

    
50
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
51
{
52
    int i;
53
    char *q, r;
54

    
55
    q = buf;
56
    for(i=0;i<len;i++) {
57
        r = get_byte(pb);
58
        if (i < buf_size - 1)
59
            *q++ = r;
60
    }
61
    if (buf_size > 0) *q = '\0';
62
}
63

    
64
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
65
{
66
    get_strl(pb, buf, buf_size, get_be16(pb));
67
}
68

    
69
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
70
{
71
    get_strl(pb, buf, buf_size, get_byte(pb));
72
}
73

    
74
RMStream *ff_rm_alloc_rmstream (void)
75
{
76
    RMStream *rms = av_mallocz(sizeof(RMStream));
77
    rms->curpic_num = -1;
78
    return rms;
79
}
80

    
81
void ff_rm_free_rmstream (RMStream *rms)
82
{
83
    av_freep(&rms->buf);
84
}
85

    
86
static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
87
                                     AVStream *st, RMStream *ast, int read_all)
88
{
89
    char buf[256];
90
    uint32_t version;
91

    
92
    /* ra type header */
93
    version = get_be32(pb); /* version */
94
    if (((version >> 16) & 0xff) == 3) {
95
        int64_t startpos = url_ftell(pb);
96
        url_fskip(pb, 14);
97
        get_str8(pb, s->title, sizeof(s->title));
98
        get_str8(pb, s->author, sizeof(s->author));
99
        get_str8(pb, s->copyright, sizeof(s->copyright));
100
        get_str8(pb, s->comment, sizeof(s->comment));
101
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
102
            // fourcc (should always be "lpcJ")
103
            get_byte(pb);
104
            get_str8(pb, buf, sizeof(buf));
105
        }
106
        // Skip extra header crap (this should never happen)
107
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
108
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
109
        st->codec->sample_rate = 8000;
110
        st->codec->channels = 1;
111
        st->codec->codec_type = CODEC_TYPE_AUDIO;
112
        st->codec->codec_id = CODEC_ID_RA_144;
113
    } else {
114
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
115
        /* old version (4) */
116
        get_be32(pb); /* .ra4 */
117
        get_be32(pb); /* data size */
118
        get_be16(pb); /* version2 */
119
        get_be32(pb); /* header size */
120
        flavor= get_be16(pb); /* add codec info / flavor */
121
        ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
122
        get_be32(pb); /* ??? */
123
        get_be32(pb); /* ??? */
124
        get_be32(pb); /* ??? */
125
        ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
126
        st->codec->block_align= get_be16(pb); /* frame size */
127
        ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
128
        get_be16(pb); /* ??? */
129
        if (((version >> 16) & 0xff) == 5) {
130
            get_be16(pb); get_be16(pb); get_be16(pb);
131
        }
132
        st->codec->sample_rate = get_be16(pb);
133
        get_be32(pb);
134
        st->codec->channels = get_be16(pb);
135
        if (((version >> 16) & 0xff) == 5) {
136
            get_be32(pb);
137
            get_buffer(pb, buf, 4);
138
            buf[4] = 0;
139
        } else {
140
            get_str8(pb, buf, sizeof(buf)); /* desc */
141
            get_str8(pb, buf, sizeof(buf)); /* desc */
142
        }
143
        st->codec->codec_type = CODEC_TYPE_AUDIO;
144
        if (!strcmp(buf, "dnet")) {
145
            st->codec->codec_id = CODEC_ID_AC3;
146
            st->need_parsing = AVSTREAM_PARSE_FULL;
147
        } else if (!strcmp(buf, "28_8")) {
148
            st->codec->codec_id = CODEC_ID_RA_288;
149
            st->codec->extradata_size= 0;
150
            ast->audio_framesize = st->codec->block_align;
151
            st->codec->block_align = coded_framesize;
152

    
153
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
154
                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
155
                return -1;
156
            }
157

    
158
            ast->buf = av_malloc(ast->audio_framesize * sub_packet_h);
159
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
160
            int codecdata_length;
161
            get_be16(pb); get_byte(pb);
162
            if (((version >> 16) & 0xff) == 5)
163
                get_byte(pb);
164
            codecdata_length = get_be32(pb);
165
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
166
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
167
                return -1;
168
            }
169

    
170
            if(sub_packet_size <= 0){
171
                av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
172
                return -1;
173
            }
174

    
175
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
176
            else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
177
            else st->codec->codec_id = CODEC_ID_ATRAC3;
178
            st->codec->extradata_size= codecdata_length;
179
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
180
            get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
181
            ast->audio_framesize = st->codec->block_align;
182
            st->codec->block_align = ast->sub_packet_size;
183

    
184
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
185
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
186
                return -1;
187
            }
188

    
189
            ast->buf = av_malloc(ast->audio_framesize * sub_packet_h);
190
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
191
            int codecdata_length;
192
            get_be16(pb); get_byte(pb);
193
            if (((version >> 16) & 0xff) == 5)
194
                get_byte(pb);
195
            st->codec->codec_id = CODEC_ID_AAC;
196
            codecdata_length = get_be32(pb);
197
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
198
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
199
                return -1;
200
            }
201
            if (codecdata_length >= 1) {
202
                st->codec->extradata_size = codecdata_length - 1;
203
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
204
                get_byte(pb);
205
                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
206
            }
207
        } else {
208
            st->codec->codec_id = CODEC_ID_NONE;
209
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
210
        }
211
        if (read_all) {
212
            get_byte(pb);
213
            get_byte(pb);
214
            get_byte(pb);
215

    
216
            get_str8(pb, s->title, sizeof(s->title));
217
            get_str8(pb, s->author, sizeof(s->author));
218
            get_str8(pb, s->copyright, sizeof(s->copyright));
219
            get_str8(pb, s->comment, sizeof(s->comment));
220
        }
221
    }
222
    return 0;
223
}
224

    
225
int
226
ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
227
                           AVStream *st, RMStream *rst, int codec_data_size)
228
{
229
    unsigned int v;
230
    int size;
231
    int64_t codec_pos;
232

    
233
    av_set_pts_info(st, 64, 1, 1000);
234
    codec_pos = url_ftell(pb);
235
    v = get_be32(pb);
236
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
237
        /* ra type header */
238
        if (rm_read_audio_stream_info(s, pb, st, rst, 0))
239
            return -1;
240
    } else {
241
        int fps, fps2;
242
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
243
        fail1:
244
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
245
            goto skip;
246
        }
247
        st->codec->codec_tag = get_le32(pb);
248
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
249
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
250
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
251
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
252
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
253
            && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
254
            goto fail1;
255
        st->codec->width = get_be16(pb);
256
        st->codec->height = get_be16(pb);
257
        st->codec->time_base.num= 1;
258
        fps= get_be16(pb);
259
        st->codec->codec_type = CODEC_TYPE_VIDEO;
260
        get_be32(pb);
261
        fps2= get_be16(pb);
262
        get_be16(pb);
263

    
264
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
265

    
266
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
267
            //check is redundant as get_buffer() will catch this
268
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
269
            return -1;
270
        }
271
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
272
        if (!st->codec->extradata)
273
            return AVERROR(ENOMEM);
274
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
275

    
276
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
277
        st->codec->time_base.den = fps * st->codec->time_base.num;
278
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
279
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
280
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
281
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
282
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
283
        default: goto fail1;
284
        }
285
    }
286

    
287
skip:
288
    /* skip codec info */
289
    size = url_ftell(pb) - codec_pos;
290
    url_fskip(pb, codec_data_size - size);
291

    
292
    return 0;
293
}
294

    
295

    
296
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
297
{
298
    RMDemuxContext *rm = s->priv_data;
299
    AVStream *st;
300

    
301
    rm->old_format = 1;
302
    st = av_new_stream(s, 0);
303
    if (!st)
304
        return -1;
305
    st->priv_data = ff_rm_alloc_rmstream();
306
    return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
307
}
308

    
309
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
310
{
311
    RMDemuxContext *rm = s->priv_data;
312
    AVStream *st;
313
    ByteIOContext *pb = s->pb;
314
    unsigned int tag;
315
    int tag_size;
316
    unsigned int start_time, duration;
317
    char buf[128];
318
    int flags = 0;
319

    
320
    tag = get_le32(pb);
321
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
322
        /* very old .ra format */
323
        return rm_read_header_old(s, ap);
324
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
325
        return AVERROR(EIO);
326
    }
327

    
328
    get_be32(pb); /* header size */
329
    get_be16(pb);
330
    get_be32(pb);
331
    get_be32(pb); /* number of headers */
332

    
333
    for(;;) {
334
        if (url_feof(pb))
335
            return -1;
336
        tag = get_le32(pb);
337
        tag_size = get_be32(pb);
338
        get_be16(pb);
339
#if 0
340
        printf("tag=%c%c%c%c (%08x) size=%d\n",
341
               (tag) & 0xff,
342
               (tag >> 8) & 0xff,
343
               (tag >> 16) & 0xff,
344
               (tag >> 24) & 0xff,
345
               tag,
346
               tag_size);
347
#endif
348
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
349
            return -1;
350
        switch(tag) {
351
        case MKTAG('P', 'R', 'O', 'P'):
352
            /* file header */
353
            get_be32(pb); /* max bit rate */
354
            get_be32(pb); /* avg bit rate */
355
            get_be32(pb); /* max packet size */
356
            get_be32(pb); /* avg packet size */
357
            get_be32(pb); /* nb packets */
358
            get_be32(pb); /* duration */
359
            get_be32(pb); /* preroll */
360
            get_be32(pb); /* index offset */
361
            get_be32(pb); /* data offset */
362
            get_be16(pb); /* nb streams */
363
            flags = get_be16(pb); /* flags */
364
            break;
365
        case MKTAG('C', 'O', 'N', 'T'):
366
            get_str16(pb, s->title, sizeof(s->title));
367
            get_str16(pb, s->author, sizeof(s->author));
368
            get_str16(pb, s->copyright, sizeof(s->copyright));
369
            get_str16(pb, s->comment, sizeof(s->comment));
370
            break;
371
        case MKTAG('M', 'D', 'P', 'R'):
372
            st = av_new_stream(s, 0);
373
            if (!st)
374
                return AVERROR(ENOMEM);
375
            st->id = get_be16(pb);
376
            get_be32(pb); /* max bit rate */
377
            st->codec->bit_rate = get_be32(pb); /* bit rate */
378
            get_be32(pb); /* max packet size */
379
            get_be32(pb); /* avg packet size */
380
            start_time = get_be32(pb); /* start time */
381
            get_be32(pb); /* preroll */
382
            duration = get_be32(pb); /* duration */
383
            st->start_time = start_time;
384
            st->duration = duration;
385
            get_str8(pb, buf, sizeof(buf)); /* desc */
386
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
387
            st->codec->codec_type = CODEC_TYPE_DATA;
388
            st->priv_data = ff_rm_alloc_rmstream();
389
            if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
390
                                          get_be32(pb)) < 0)
391
                return -1;
392
            break;
393
        case MKTAG('D', 'A', 'T', 'A'):
394
            goto header_end;
395
        default:
396
            /* unknown tag: skip it */
397
            url_fskip(pb, tag_size - 10);
398
            break;
399
        }
400
    }
401
 header_end:
402
    rm->nb_packets = get_be32(pb); /* number of packets */
403
    if (!rm->nb_packets && (flags & 4))
404
        rm->nb_packets = 3600 * 25;
405
    get_be32(pb); /* next data header */
406
    return 0;
407
}
408

    
409
static int get_num(ByteIOContext *pb, int *len)
410
{
411
    int n, n1;
412

    
413
    n = get_be16(pb);
414
    (*len)-=2;
415
    n &= 0x7FFF;
416
    if (n >= 0x4000) {
417
        return n - 0x4000;
418
    } else {
419
        n1 = get_be16(pb);
420
        (*len)-=2;
421
        return (n << 16) | n1;
422
    }
423
}
424

    
425
/* multiple of 20 bytes for ra144 (ugly) */
426
#define RAW_PACKET_SIZE 1000
427

    
428
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
429
    RMDemuxContext *rm = s->priv_data;
430
    ByteIOContext *pb = s->pb;
431
    int len, num, res, i;
432
    AVStream *st;
433
    uint32_t state=0xFFFFFFFF;
434

    
435
    while(!url_feof(pb)){
436
        *pos= url_ftell(pb) - 3;
437
        if(rm->remaining_len > 0){
438
            num= rm->current_stream;
439
            len= rm->remaining_len;
440
            *timestamp = AV_NOPTS_VALUE;
441
            *flags= 0;
442
        }else{
443
            state= (state<<8) + get_byte(pb);
444

    
445
            if(state == MKBETAG('I', 'N', 'D', 'X')){
446
                len = get_be16(pb) - 6;
447
                if(len<0)
448
                    continue;
449
                goto skip;
450
            }
451

    
452
            if(state > (unsigned)0xFFFF || state < 12)
453
                continue;
454
            len=state;
455
            state= 0xFFFFFFFF;
456

    
457
            num = get_be16(pb);
458
            *timestamp = get_be32(pb);
459
            res= get_byte(pb); /* reserved */
460
            *flags = get_byte(pb); /* flags */
461

    
462

    
463
            len -= 12;
464
        }
465
        for(i=0;i<s->nb_streams;i++) {
466
            st = s->streams[i];
467
            if (num == st->id)
468
                break;
469
        }
470
        if (i == s->nb_streams) {
471
skip:
472
            /* skip packet if unknown number */
473
            url_fskip(pb, len);
474
            rm->remaining_len -= len;
475
            continue;
476
        }
477
        *stream_index= i;
478

    
479
        return len;
480
    }
481
    return -1;
482
}
483

    
484
static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
485
                                   RMDemuxContext *rm, RMStream *vst,
486
                                   AVPacket *pkt, int len)
487
{
488
    int hdr, seq, pic_num, len2, pos;
489
    int type;
490

    
491
    hdr = get_byte(pb); len--;
492
    type = hdr >> 6;
493

    
494
    if(type != 3){  // not frame as a part of packet
495
        seq = get_byte(pb); len--;
496
    }
497
    if(type != 1){  // not whole frame
498
        len2 = get_num(pb, &len);
499
        pos  = get_num(pb, &len);
500
        pic_num = get_byte(pb); len--;
501
    }
502
    if(len<0)
503
        return -1;
504
    rm->remaining_len = len;
505
    if(type&1){     // frame, not slice
506
        if(type == 3)  // frame as a part of packet
507
            len= len2;
508
        if(rm->remaining_len < len)
509
            return -1;
510
        rm->remaining_len -= len;
511
        if(av_new_packet(pkt, len + 9) < 0)
512
            return AVERROR(EIO);
513
        pkt->data[0] = 0;
514
        AV_WL32(pkt->data + 1, 1);
515
        AV_WL32(pkt->data + 5, 0);
516
        get_buffer(pb, pkt->data + 9, len);
517
        return 0;
518
    }
519
    //now we have to deal with single slice
520

    
521
    if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
522
        vst->slices = ((hdr & 0x3F) << 1) + 1;
523
        vst->videobufsize = len2 + 8*vst->slices + 1;
524
        av_free(vst->buf);
525
        if(!(vst->buf = av_malloc(vst->videobufsize)))
526
            return AVERROR(ENOMEM);
527
        vst->videobufpos = 8*vst->slices + 1;
528
        vst->cur_slice = 0;
529
        vst->curpic_num = pic_num;
530
        vst->pktpos = url_ftell(pb);
531
    }
532
    if(type == 2)
533
        len = FFMIN(len, pos);
534

    
535
    if(++vst->cur_slice > vst->slices)
536
        return 1;
537
    AV_WL32(vst->buf - 7 + 8*vst->cur_slice, 1);
538
    AV_WL32(vst->buf - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
539
    if(vst->videobufpos + len > vst->videobufsize)
540
        return 1;
541
    if (get_buffer(pb, vst->buf + vst->videobufpos, len) != len)
542
        return AVERROR(EIO);
543
    vst->videobufpos += len;
544
    rm->remaining_len-= len;
545

    
546
    if(type == 2 || (vst->videobufpos) == vst->videobufsize){
547
         vst->buf[0] = vst->cur_slice-1;
548
         if(av_new_packet(pkt, vst->videobufpos - 8*(vst->slices - vst->cur_slice)) < 0)
549
             return AVERROR(ENOMEM);
550
         memcpy(pkt->data, vst->buf, 1 + 8*vst->cur_slice);
551
         memcpy(pkt->data + 1 + 8*vst->cur_slice, vst->buf + 1 + 8*vst->slices,
552
                vst->videobufpos - 1 - 8*vst->slices);
553
         pkt->pts = AV_NOPTS_VALUE;
554
         pkt->pos = vst->pktpos;
555
         return 0;
556
    }
557

    
558
    return 1;
559
}
560

    
561
static inline void
562
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
563
{
564
    uint8_t *ptr;
565
    int j;
566

    
567
    if (st->codec->codec_id == CODEC_ID_AC3) {
568
        ptr = pkt->data;
569
        for (j=0;j<pkt->size;j+=2) {
570
            FFSWAP(int, ptr[0], ptr[1]);
571
            ptr += 2;
572
        }
573
    }
574
}
575

    
576
int
577
ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
578
                    AVStream *st, RMStream *ast, int len, AVPacket *pkt,
579
                    int *seq, int *flags, int64_t *timestamp)
580
{
581
    RMDemuxContext *rm = s->priv_data;
582

    
583
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
584
        rm->current_stream= st->id;
585
        if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))
586
            return -1; //got partial frame
587
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
588
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
589
            (st->codec->codec_id == CODEC_ID_COOK) ||
590
            (st->codec->codec_id == CODEC_ID_ATRAC3) ||
591
            (st->codec->codec_id == CODEC_ID_SIPR)) {
592
            int x;
593
            int sps = ast->sub_packet_size;
594
            int cfs = ast->coded_framesize;
595
            int h = ast->sub_packet_h;
596
            int y = ast->sub_packet_cnt;
597
            int w = ast->audio_framesize;
598

    
599
            if (*flags & 2)
600
                y = ast->sub_packet_cnt = 0;
601
            if (!y)
602
                ast->audiotimestamp = *timestamp;
603

    
604
            switch(st->codec->codec_id) {
605
                case CODEC_ID_RA_288:
606
                    for (x = 0; x < h/2; x++)
607
                        get_buffer(pb, ast->buf+x*2*w+y*cfs, cfs);
608
                    break;
609
                case CODEC_ID_ATRAC3:
610
                case CODEC_ID_COOK:
611
                    for (x = 0; x < w/sps; x++)
612
                        get_buffer(pb, ast->buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
613
                    break;
614
            }
615

    
616
            if (++(ast->sub_packet_cnt) < h)
617
                return -1;
618
            else {
619
                ast->sub_packet_cnt = 0;
620
                rm->audio_stream_num = st->index;
621
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
622
                // Release first audio packet
623
                av_new_packet(pkt, st->codec->block_align);
624
                memcpy(pkt->data, ast->buf, st->codec->block_align);
625
                *timestamp = ast->audiotimestamp;
626
                *flags = 2; // Mark first packet as keyframe
627
            }
628
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
629
            int x;
630
            rm->audio_stream_num = st->index;
631
            ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
632
            if (ast->sub_packet_cnt) {
633
                for (x = 0; x < ast->sub_packet_cnt; x++)
634
                    ast->sub_packet_lengths[x] = get_be16(pb);
635
                // Release first audio packet
636
                rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
637
                av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
638
                *flags = 2; // Mark first packet as keyframe
639
            }
640
        } else {
641
            av_get_packet(pb, pkt, len);
642
            rm_ac3_swap_bytes(st, pkt);
643
        }
644
    } else
645
        av_get_packet(pb, pkt, len);
646

    
647
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
648
       || st->discard >= AVDISCARD_ALL){
649
        av_free_packet(pkt);
650
        return -1;
651
    }
652

    
653
    pkt->stream_index = st->index;
654

    
655
#if 0
656
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
657
        if(st->codec->codec_id == CODEC_ID_RV20){
658
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
659
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
660

661
            seq |= (*timestamp&~0x3FFF);
662
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
663
            if(seq - *timestamp < -0x2000) seq += 0x4000;
664
        }
665
    }
666
#endif
667

    
668
    pkt->pts= *timestamp;
669
    if (*flags & 2)
670
        pkt->flags |= PKT_FLAG_KEY;
671

    
672
    return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
673
}
674

    
675
int
676
ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
677
                      AVStream *st, RMStream *ast, AVPacket *pkt)
678
{
679
    RMDemuxContext *rm = s->priv_data;
680

    
681
    assert (rm->audio_pkt_cnt > 0);
682

    
683
    if (st->codec->codec_id == CODEC_ID_AAC)
684
        av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
685
    else {
686
        av_new_packet(pkt, st->codec->block_align);
687
        memcpy(pkt->data, ast->buf + st->codec->block_align *
688
               (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
689
               st->codec->block_align);
690
    }
691
    rm->audio_pkt_cnt--;
692
    pkt->flags = 0;
693
    pkt->stream_index = st->index;
694

    
695
    return rm->audio_pkt_cnt;
696
}
697

    
698
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
699
{
700
    RMDemuxContext *rm = s->priv_data;
701
    ByteIOContext *pb = s->pb;
702
    AVStream *st;
703
    int i, len;
704
    int64_t timestamp, pos;
705
    int flags;
706

    
707
    if (rm->audio_pkt_cnt) {
708
        // If there are queued audio packet return them first
709
        st = s->streams[rm->audio_stream_num];
710
        ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
711
    } else if (rm->old_format) {
712
        RMStream *ast;
713

    
714
        st = s->streams[0];
715
        ast = st->priv_data;
716
        if (st->codec->codec_id == CODEC_ID_RA_288) {
717
            int x, y;
718

    
719
            for (y = 0; y < ast->sub_packet_h; y++)
720
                for (x = 0; x < ast->sub_packet_h/2; x++)
721
                    if (get_buffer(pb, ast->buf+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
722
                        return AVERROR(EIO);
723
            rm->audio_stream_num = 0;
724
            rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
725
            // Release first audio packet
726
            av_new_packet(pkt, st->codec->block_align);
727
            memcpy(pkt->data, ast->buf, st->codec->block_align);
728
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
729
            pkt->stream_index = 0;
730
        } else {
731
            /* just read raw bytes */
732
            len = RAW_PACKET_SIZE;
733
            len= av_get_packet(pb, pkt, len);
734
            pkt->stream_index = 0;
735
            if (len <= 0) {
736
                return AVERROR(EIO);
737
            }
738
            pkt->size = len;
739
        }
740
        rm_ac3_swap_bytes(st, pkt);
741
    } else {
742
        int seq=1;
743
resync:
744
        len=sync(s, &timestamp, &flags, &i, &pos);
745
        if(len<0)
746
            return AVERROR(EIO);
747
        st = s->streams[i];
748

    
749
        if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
750
                                &seq, &flags, &timestamp) < 0)
751
            goto resync;
752

    
753
        if((flags&2) && (seq&0x7F) == 1)
754
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
755
    }
756

    
757
    return 0;
758
}
759

    
760
static int rm_read_close(AVFormatContext *s)
761
{
762
    int i;
763

    
764
    for (i=0;i<s->nb_streams;i++)
765
        ff_rm_free_rmstream(s->streams[i]->priv_data);
766

    
767
    return 0;
768
}
769

    
770
static int rm_probe(AVProbeData *p)
771
{
772
    /* check file header */
773
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
774
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
775
         p->buf[4] == 0 && p->buf[5] == 0) ||
776
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
777
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
778
        return AVPROBE_SCORE_MAX;
779
    else
780
        return 0;
781
}
782

    
783
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
784
                               int64_t *ppos, int64_t pos_limit)
785
{
786
    RMDemuxContext *rm = s->priv_data;
787
    int64_t pos, dts;
788
    int stream_index2, flags, len, h;
789

    
790
    pos = *ppos;
791

    
792
    if(rm->old_format)
793
        return AV_NOPTS_VALUE;
794

    
795
    url_fseek(s->pb, pos, SEEK_SET);
796
    rm->remaining_len=0;
797
    for(;;){
798
        int seq=1;
799
        AVStream *st;
800

    
801
        len=sync(s, &dts, &flags, &stream_index2, &pos);
802
        if(len<0)
803
            return AV_NOPTS_VALUE;
804

    
805
        st = s->streams[stream_index2];
806
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
807
            h= get_byte(s->pb); len--;
808
            if(!(h & 0x40)){
809
                seq = get_byte(s->pb); len--;
810
            }
811
        }
812

    
813
        if((flags&2) && (seq&0x7F) == 1){
814
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
815
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
816
            if(stream_index2 == stream_index)
817
                break;
818
        }
819

    
820
        url_fskip(s->pb, len);
821
    }
822
    *ppos = pos;
823
    return dts;
824
}
825

    
826
AVInputFormat rm_demuxer = {
827
    "rm",
828
    NULL_IF_CONFIG_SMALL("RM format"),
829
    sizeof(RMDemuxContext),
830
    rm_probe,
831
    rm_read_header,
832
    rm_read_packet,
833
    rm_read_close,
834
    NULL,
835
    rm_read_dts,
836
};
837

    
838
AVInputFormat rdt_demuxer = {
839
    "rdt",
840
    NULL_IF_CONFIG_SMALL("RDT demuxer"),
841
    sizeof(RMDemuxContext),
842
    NULL, NULL, NULL, rm_read_close, NULL, NULL
843
};