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ffmpeg / libavformat / rmdec.c @ 74afdc55

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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 "libavutil/intreadwrite.h"
24
#include "avformat.h"
25
#include "rm.h"
26

    
27
struct RMStream {
28
    AVPacket pkt;      ///< place to store merged video frame / reordered audio data
29
    int videobufsize;  ///< current assembled frame size
30
    int videobufpos;   ///< position for the next slice in the video buffer
31
    int curpic_num;    ///< picture number of current frame
32
    int cur_slice, slices;
33
    int64_t pktpos;    ///< first slice position in file
34
    /// Audio descrambling matrix parameters
35
    int64_t audiotimestamp; ///< Audio packet timestamp
36
    int sub_packet_cnt; // Subpacket counter, used while reading
37
    int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
38
    int audio_framesize; /// Audio frame size from container
39
    int sub_packet_lengths[16]; /// Length of each subpacket
40
};
41

    
42
typedef struct {
43
    int nb_packets;
44
    int old_format;
45
    int current_stream;
46
    int remaining_len;
47
    int audio_stream_num; ///< Stream number for audio packets
48
    int audio_pkt_cnt; ///< Output packet counter
49
} RMDemuxContext;
50

    
51
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
52
{
53
    int i;
54
    char *q, r;
55

    
56
    q = buf;
57
    for(i=0;i<len;i++) {
58
        r = get_byte(pb);
59
        if (i < buf_size - 1)
60
            *q++ = r;
61
    }
62
    if (buf_size > 0) *q = '\0';
63
}
64

    
65
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
66
{
67
    get_strl(pb, buf, buf_size, get_be16(pb));
68
}
69

    
70
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
71
{
72
    get_strl(pb, buf, buf_size, get_byte(pb));
73
}
74

    
75
RMStream *ff_rm_alloc_rmstream (void)
76
{
77
    RMStream *rms = av_mallocz(sizeof(RMStream));
78
    rms->curpic_num = -1;
79
    return rms;
80
}
81

    
82
void ff_rm_free_rmstream (RMStream *rms)
83
{
84
    av_free_packet(&rms->pkt);
85
}
86

    
87
static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
88
                                     AVStream *st, RMStream *ast, int read_all)
89
{
90
    char buf[256];
91
    uint32_t version;
92

    
93
    /* ra type header */
94
    version = get_be32(pb); /* version */
95
    if (((version >> 16) & 0xff) == 3) {
96
        int64_t startpos = url_ftell(pb);
97
        url_fskip(pb, 14);
98
        get_str8(pb, s->title, sizeof(s->title));
99
        get_str8(pb, s->author, sizeof(s->author));
100
        get_str8(pb, s->copyright, sizeof(s->copyright));
101
        get_str8(pb, s->comment, sizeof(s->comment));
102
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
103
            // fourcc (should always be "lpcJ")
104
            get_byte(pb);
105
            get_str8(pb, buf, sizeof(buf));
106
        }
107
        // Skip extra header crap (this should never happen)
108
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
109
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
110
        st->codec->sample_rate = 8000;
111
        st->codec->channels = 1;
112
        st->codec->codec_type = CODEC_TYPE_AUDIO;
113
        st->codec->codec_id = CODEC_ID_RA_144;
114
    } else {
115
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
116
        /* old version (4) */
117
        get_be32(pb); /* .ra4 */
118
        get_be32(pb); /* data size */
119
        get_be16(pb); /* version2 */
120
        get_be32(pb); /* header size */
121
        flavor= get_be16(pb); /* add codec info / flavor */
122
        ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
123
        get_be32(pb); /* ??? */
124
        get_be32(pb); /* ??? */
125
        get_be32(pb); /* ??? */
126
        ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
127
        st->codec->block_align= get_be16(pb); /* frame size */
128
        ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
129
        get_be16(pb); /* ??? */
130
        if (((version >> 16) & 0xff) == 5) {
131
            get_be16(pb); get_be16(pb); get_be16(pb);
132
        }
133
        st->codec->sample_rate = get_be16(pb);
134
        get_be32(pb);
135
        st->codec->channels = get_be16(pb);
136
        if (((version >> 16) & 0xff) == 5) {
137
            get_be32(pb);
138
            get_buffer(pb, buf, 4);
139
            buf[4] = 0;
140
        } else {
141
            get_str8(pb, buf, sizeof(buf)); /* desc */
142
            get_str8(pb, buf, sizeof(buf)); /* desc */
143
        }
144
        st->codec->codec_type = CODEC_TYPE_AUDIO;
145
        if (!strcmp(buf, "dnet")) {
146
            st->codec->codec_id = CODEC_ID_AC3;
147
            st->need_parsing = AVSTREAM_PARSE_FULL;
148
        } else if (!strcmp(buf, "28_8")) {
149
            st->codec->codec_id = CODEC_ID_RA_288;
150
            st->codec->extradata_size= 0;
151
            ast->audio_framesize = st->codec->block_align;
152
            st->codec->block_align = coded_framesize;
153

    
154
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
155
                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
156
                return -1;
157
            }
158

    
159
            av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
160
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
161
            int codecdata_length;
162
            get_be16(pb); get_byte(pb);
163
            if (((version >> 16) & 0xff) == 5)
164
                get_byte(pb);
165
            codecdata_length = get_be32(pb);
166
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
167
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
168
                return -1;
169
            }
170

    
171
            if(sub_packet_size <= 0){
172
                av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
173
                return -1;
174
            }
175

    
176
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
177
            else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
178
            else st->codec->codec_id = CODEC_ID_ATRAC3;
179
            st->codec->extradata_size= codecdata_length;
180
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
181
            get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
182
            ast->audio_framesize = st->codec->block_align;
183
            st->codec->block_align = ast->sub_packet_size;
184

    
185
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
186
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
187
                return -1;
188
            }
189

    
190
            av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
191
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
192
            int codecdata_length;
193
            get_be16(pb); get_byte(pb);
194
            if (((version >> 16) & 0xff) == 5)
195
                get_byte(pb);
196
            st->codec->codec_id = CODEC_ID_AAC;
197
            codecdata_length = get_be32(pb);
198
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
199
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
200
                return -1;
201
            }
202
            if (codecdata_length >= 1) {
203
                st->codec->extradata_size = codecdata_length - 1;
204
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
205
                get_byte(pb);
206
                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
207
            }
208
        } else {
209
            st->codec->codec_id = CODEC_ID_NONE;
210
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
211
        }
212
        if (read_all) {
213
            get_byte(pb);
214
            get_byte(pb);
215
            get_byte(pb);
216

    
217
            get_str8(pb, s->title, sizeof(s->title));
218
            get_str8(pb, s->author, sizeof(s->author));
219
            get_str8(pb, s->copyright, sizeof(s->copyright));
220
            get_str8(pb, s->comment, sizeof(s->comment));
221
        }
222
    }
223
    return 0;
224
}
225

    
226
int
227
ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
228
                           AVStream *st, RMStream *rst, int codec_data_size)
229
{
230
    unsigned int v;
231
    int size;
232
    int64_t codec_pos;
233

    
234
    av_set_pts_info(st, 64, 1, 1000);
235
    codec_pos = url_ftell(pb);
236
    v = get_be32(pb);
237
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
238
        /* ra type header */
239
        if (rm_read_audio_stream_info(s, pb, st, rst, 0))
240
            return -1;
241
    } else {
242
        int fps, fps2;
243
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
244
        fail1:
245
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
246
            goto skip;
247
        }
248
        st->codec->codec_tag = get_le32(pb);
249
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
250
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
251
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
252
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
253
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
254
            && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
255
            goto fail1;
256
        st->codec->width = get_be16(pb);
257
        st->codec->height = get_be16(pb);
258
        st->codec->time_base.num= 1;
259
        fps= get_be16(pb);
260
        st->codec->codec_type = CODEC_TYPE_VIDEO;
261
        get_be32(pb);
262
        fps2= get_be16(pb);
263
        get_be16(pb);
264

    
265
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
266

    
267
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
268
            //check is redundant as get_buffer() will catch this
269
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
270
            return -1;
271
        }
272
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
273
        if (!st->codec->extradata)
274
            return AVERROR(ENOMEM);
275
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
276

    
277
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
278
        st->codec->time_base.den = fps * st->codec->time_base.num;
279
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
280
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
281
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
282
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
283
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
284
        default: goto fail1;
285
        }
286
    }
287

    
288
skip:
289
    /* skip codec info */
290
    size = url_ftell(pb) - codec_pos;
291
    url_fskip(pb, codec_data_size - size);
292

    
293
    return 0;
294
}
295

    
296

    
297
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
298
{
299
    RMDemuxContext *rm = s->priv_data;
300
    AVStream *st;
301

    
302
    rm->old_format = 1;
303
    st = av_new_stream(s, 0);
304
    if (!st)
305
        return -1;
306
    st->priv_data = ff_rm_alloc_rmstream();
307
    return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
308
}
309

    
310
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
311
{
312
    RMDemuxContext *rm = s->priv_data;
313
    AVStream *st;
314
    ByteIOContext *pb = s->pb;
315
    unsigned int tag;
316
    int tag_size;
317
    unsigned int start_time, duration;
318
    char buf[128];
319
    int flags = 0;
320

    
321
    tag = get_le32(pb);
322
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
323
        /* very old .ra format */
324
        return rm_read_header_old(s, ap);
325
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
326
        return AVERROR(EIO);
327
    }
328

    
329
    get_be32(pb); /* header size */
330
    get_be16(pb);
331
    get_be32(pb);
332
    get_be32(pb); /* number of headers */
333

    
334
    for(;;) {
335
        if (url_feof(pb))
336
            return -1;
337
        tag = get_le32(pb);
338
        tag_size = get_be32(pb);
339
        get_be16(pb);
340
#if 0
341
        printf("tag=%c%c%c%c (%08x) size=%d\n",
342
               (tag) & 0xff,
343
               (tag >> 8) & 0xff,
344
               (tag >> 16) & 0xff,
345
               (tag >> 24) & 0xff,
346
               tag,
347
               tag_size);
348
#endif
349
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
350
            return -1;
351
        switch(tag) {
352
        case MKTAG('P', 'R', 'O', 'P'):
353
            /* file header */
354
            get_be32(pb); /* max bit rate */
355
            get_be32(pb); /* avg bit rate */
356
            get_be32(pb); /* max packet size */
357
            get_be32(pb); /* avg packet size */
358
            get_be32(pb); /* nb packets */
359
            get_be32(pb); /* duration */
360
            get_be32(pb); /* preroll */
361
            get_be32(pb); /* index offset */
362
            get_be32(pb); /* data offset */
363
            get_be16(pb); /* nb streams */
364
            flags = get_be16(pb); /* flags */
365
            break;
366
        case MKTAG('C', 'O', 'N', 'T'):
367
            get_str16(pb, s->title, sizeof(s->title));
368
            get_str16(pb, s->author, sizeof(s->author));
369
            get_str16(pb, s->copyright, sizeof(s->copyright));
370
            get_str16(pb, s->comment, sizeof(s->comment));
371
            break;
372
        case MKTAG('M', 'D', 'P', 'R'):
373
            st = av_new_stream(s, 0);
374
            if (!st)
375
                return AVERROR(ENOMEM);
376
            st->id = get_be16(pb);
377
            get_be32(pb); /* max bit rate */
378
            st->codec->bit_rate = get_be32(pb); /* bit rate */
379
            get_be32(pb); /* max packet size */
380
            get_be32(pb); /* avg packet size */
381
            start_time = get_be32(pb); /* start time */
382
            get_be32(pb); /* preroll */
383
            duration = get_be32(pb); /* duration */
384
            st->start_time = start_time;
385
            st->duration = duration;
386
            get_str8(pb, buf, sizeof(buf)); /* desc */
387
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
388
            st->codec->codec_type = CODEC_TYPE_DATA;
389
            st->priv_data = ff_rm_alloc_rmstream();
390
            if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
391
                                          get_be32(pb)) < 0)
392
                return -1;
393
            break;
394
        case MKTAG('D', 'A', 'T', 'A'):
395
            goto header_end;
396
        default:
397
            /* unknown tag: skip it */
398
            url_fskip(pb, tag_size - 10);
399
            break;
400
        }
401
    }
402
 header_end:
403
    rm->nb_packets = get_be32(pb); /* number of packets */
404
    if (!rm->nb_packets && (flags & 4))
405
        rm->nb_packets = 3600 * 25;
406
    get_be32(pb); /* next data header */
407
    return 0;
408
}
409

    
410
static int get_num(ByteIOContext *pb, int *len)
411
{
412
    int n, n1;
413

    
414
    n = get_be16(pb);
415
    (*len)-=2;
416
    n &= 0x7FFF;
417
    if (n >= 0x4000) {
418
        return n - 0x4000;
419
    } else {
420
        n1 = get_be16(pb);
421
        (*len)-=2;
422
        return (n << 16) | n1;
423
    }
424
}
425

    
426
/* multiple of 20 bytes for ra144 (ugly) */
427
#define RAW_PACKET_SIZE 1000
428

    
429
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
430
    RMDemuxContext *rm = s->priv_data;
431
    ByteIOContext *pb = s->pb;
432
    int len, num, res, i;
433
    AVStream *st;
434
    uint32_t state=0xFFFFFFFF;
435

    
436
    while(!url_feof(pb)){
437
        *pos= url_ftell(pb) - 3;
438
        if(rm->remaining_len > 0){
439
            num= rm->current_stream;
440
            len= rm->remaining_len;
441
            *timestamp = AV_NOPTS_VALUE;
442
            *flags= 0;
443
        }else{
444
            state= (state<<8) + get_byte(pb);
445

    
446
            if(state == MKBETAG('I', 'N', 'D', 'X')){
447
                len = get_be16(pb) - 6;
448
                if(len<0)
449
                    continue;
450
                goto skip;
451
            }
452

    
453
            if(state > (unsigned)0xFFFF || state < 12)
454
                continue;
455
            len=state;
456
            state= 0xFFFFFFFF;
457

    
458
            num = get_be16(pb);
459
            *timestamp = get_be32(pb);
460
            res= get_byte(pb); /* reserved */
461
            *flags = get_byte(pb); /* flags */
462

    
463

    
464
            len -= 12;
465
        }
466
        for(i=0;i<s->nb_streams;i++) {
467
            st = s->streams[i];
468
            if (num == st->id)
469
                break;
470
        }
471
        if (i == s->nb_streams) {
472
skip:
473
            /* skip packet if unknown number */
474
            url_fskip(pb, len);
475
            rm->remaining_len -= len;
476
            continue;
477
        }
478
        *stream_index= i;
479

    
480
        return len;
481
    }
482
    return -1;
483
}
484

    
485
static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
486
                                   RMDemuxContext *rm, RMStream *vst,
487
                                   AVPacket *pkt, int len)
488
{
489
    int hdr, seq, pic_num, len2, pos;
490
    int type;
491

    
492
    hdr = get_byte(pb); len--;
493
    type = hdr >> 6;
494

    
495
    if(type != 3){  // not frame as a part of packet
496
        seq = get_byte(pb); len--;
497
    }
498
    if(type != 1){  // not whole frame
499
        len2 = get_num(pb, &len);
500
        pos  = get_num(pb, &len);
501
        pic_num = get_byte(pb); len--;
502
    }
503
    if(len<0)
504
        return -1;
505
    rm->remaining_len = len;
506
    if(type&1){     // frame, not slice
507
        if(type == 3)  // frame as a part of packet
508
            len= len2;
509
        if(rm->remaining_len < len)
510
            return -1;
511
        rm->remaining_len -= len;
512
        if(av_new_packet(pkt, len + 9) < 0)
513
            return AVERROR(EIO);
514
        pkt->data[0] = 0;
515
        AV_WL32(pkt->data + 1, 1);
516
        AV_WL32(pkt->data + 5, 0);
517
        get_buffer(pb, pkt->data + 9, len);
518
        return 0;
519
    }
520
    //now we have to deal with single slice
521

    
522
    if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
523
        vst->slices = ((hdr & 0x3F) << 1) + 1;
524
        vst->videobufsize = len2 + 8*vst->slices + 1;
525
        av_free_packet(&vst->pkt); //FIXME this should be output.
526
        if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
527
            return AVERROR(ENOMEM);
528
        vst->videobufpos = 8*vst->slices + 1;
529
        vst->cur_slice = 0;
530
        vst->curpic_num = pic_num;
531
        vst->pktpos = url_ftell(pb);
532
    }
533
    if(type == 2)
534
        len = FFMIN(len, pos);
535

    
536
    if(++vst->cur_slice > vst->slices)
537
        return 1;
538
    AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
539
    AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
540
    if(vst->videobufpos + len > vst->videobufsize)
541
        return 1;
542
    if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len)
543
        return AVERROR(EIO);
544
    vst->videobufpos += len;
545
    rm->remaining_len-= len;
546

    
547
    if(type == 2 || (vst->videobufpos) == vst->videobufsize){
548
        vst->pkt.data[0] = vst->cur_slice-1;
549
        *pkt= vst->pkt;
550
        vst->pkt.data= NULL;
551
        vst->pkt.size= 0;
552
        if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
553
            memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
554
                vst->videobufpos - 1 - 8*vst->slices);
555
        pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
556
        pkt->pts = AV_NOPTS_VALUE;
557
        pkt->pos = vst->pktpos;
558
        return 0;
559
    }
560

    
561
    return 1;
562
}
563

    
564
static inline void
565
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
566
{
567
    uint8_t *ptr;
568
    int j;
569

    
570
    if (st->codec->codec_id == CODEC_ID_AC3) {
571
        ptr = pkt->data;
572
        for (j=0;j<pkt->size;j+=2) {
573
            FFSWAP(int, ptr[0], ptr[1]);
574
            ptr += 2;
575
        }
576
    }
577
}
578

    
579
int
580
ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
581
                    AVStream *st, RMStream *ast, int len, AVPacket *pkt,
582
                    int *seq, int *flags, int64_t *timestamp)
583
{
584
    RMDemuxContext *rm = s->priv_data;
585

    
586
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
587
        rm->current_stream= st->id;
588
        if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))
589
            return -1; //got partial frame
590
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
591
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
592
            (st->codec->codec_id == CODEC_ID_COOK) ||
593
            (st->codec->codec_id == CODEC_ID_ATRAC3) ||
594
            (st->codec->codec_id == CODEC_ID_SIPR)) {
595
            int x;
596
            int sps = ast->sub_packet_size;
597
            int cfs = ast->coded_framesize;
598
            int h = ast->sub_packet_h;
599
            int y = ast->sub_packet_cnt;
600
            int w = ast->audio_framesize;
601

    
602
            if (*flags & 2)
603
                y = ast->sub_packet_cnt = 0;
604
            if (!y)
605
                ast->audiotimestamp = *timestamp;
606

    
607
            switch(st->codec->codec_id) {
608
                case CODEC_ID_RA_288:
609
                    for (x = 0; x < h/2; x++)
610
                        get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
611
                    break;
612
                case CODEC_ID_ATRAC3:
613
                case CODEC_ID_COOK:
614
                    for (x = 0; x < w/sps; x++)
615
                        get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
616
                    break;
617
            }
618

    
619
            if (++(ast->sub_packet_cnt) < h)
620
                return -1;
621
            else {
622
                ast->sub_packet_cnt = 0;
623
                rm->audio_stream_num = st->index;
624
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
625
                // Release first audio packet
626
                av_new_packet(pkt, st->codec->block_align);
627
                memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
628
                *timestamp = ast->audiotimestamp;
629
                *flags = 2; // Mark first packet as keyframe
630
            }
631
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
632
            int x;
633
            rm->audio_stream_num = st->index;
634
            ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
635
            if (ast->sub_packet_cnt) {
636
                for (x = 0; x < ast->sub_packet_cnt; x++)
637
                    ast->sub_packet_lengths[x] = get_be16(pb);
638
                // Release first audio packet
639
                rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
640
                av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
641
                *flags = 2; // Mark first packet as keyframe
642
            }
643
        } else {
644
            av_get_packet(pb, pkt, len);
645
            rm_ac3_swap_bytes(st, pkt);
646
        }
647
    } else
648
        av_get_packet(pb, pkt, len);
649

    
650
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
651
       || st->discard >= AVDISCARD_ALL){
652
        av_free_packet(pkt);
653
        return -1;
654
    }
655

    
656
    pkt->stream_index = st->index;
657

    
658
#if 0
659
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
660
        if(st->codec->codec_id == CODEC_ID_RV20){
661
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
662
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
663

664
            seq |= (*timestamp&~0x3FFF);
665
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
666
            if(seq - *timestamp < -0x2000) seq += 0x4000;
667
        }
668
    }
669
#endif
670

    
671
    pkt->pts= *timestamp;
672
    if (*flags & 2)
673
        pkt->flags |= PKT_FLAG_KEY;
674

    
675
    return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
676
}
677

    
678
int
679
ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
680
                      AVStream *st, RMStream *ast, AVPacket *pkt)
681
{
682
    RMDemuxContext *rm = s->priv_data;
683

    
684
    assert (rm->audio_pkt_cnt > 0);
685

    
686
    if (st->codec->codec_id == CODEC_ID_AAC)
687
        av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
688
    else {
689
        av_new_packet(pkt, st->codec->block_align);
690
        memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
691
               (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
692
               st->codec->block_align);
693
    }
694
    rm->audio_pkt_cnt--;
695
    pkt->flags = 0;
696
    pkt->stream_index = st->index;
697

    
698
    return rm->audio_pkt_cnt;
699
}
700

    
701
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
702
{
703
    RMDemuxContext *rm = s->priv_data;
704
    ByteIOContext *pb = s->pb;
705
    AVStream *st;
706
    int i, len;
707
    int64_t timestamp, pos;
708
    int flags;
709

    
710
    if (rm->audio_pkt_cnt) {
711
        // If there are queued audio packet return them first
712
        st = s->streams[rm->audio_stream_num];
713
        ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
714
    } else if (rm->old_format) {
715
        RMStream *ast;
716

    
717
        st = s->streams[0];
718
        ast = st->priv_data;
719
        if (st->codec->codec_id == CODEC_ID_RA_288) {
720
            int x, y;
721

    
722
            for (y = 0; y < ast->sub_packet_h; y++)
723
                for (x = 0; x < ast->sub_packet_h/2; x++)
724
                    if (get_buffer(pb, ast->pkt.data+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
725
                        return AVERROR(EIO);
726
            rm->audio_stream_num = 0;
727
            rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
728
            // Release first audio packet
729
            av_new_packet(pkt, st->codec->block_align);
730
            memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
731
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
732
            pkt->stream_index = 0;
733
        } else {
734
            /* just read raw bytes */
735
            len = RAW_PACKET_SIZE;
736
            len= av_get_packet(pb, pkt, len);
737
            pkt->stream_index = 0;
738
            if (len <= 0) {
739
                return AVERROR(EIO);
740
            }
741
            pkt->size = len;
742
        }
743
        rm_ac3_swap_bytes(st, pkt);
744
    } else {
745
        int seq=1;
746
resync:
747
        len=sync(s, &timestamp, &flags, &i, &pos);
748
        if(len<0)
749
            return AVERROR(EIO);
750
        st = s->streams[i];
751

    
752
        if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
753
                                &seq, &flags, &timestamp) < 0)
754
            goto resync;
755

    
756
        if((flags&2) && (seq&0x7F) == 1)
757
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
758
    }
759

    
760
    return 0;
761
}
762

    
763
static int rm_read_close(AVFormatContext *s)
764
{
765
    int i;
766

    
767
    for (i=0;i<s->nb_streams;i++)
768
        ff_rm_free_rmstream(s->streams[i]->priv_data);
769

    
770
    return 0;
771
}
772

    
773
static int rm_probe(AVProbeData *p)
774
{
775
    /* check file header */
776
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
777
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
778
         p->buf[4] == 0 && p->buf[5] == 0) ||
779
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
780
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
781
        return AVPROBE_SCORE_MAX;
782
    else
783
        return 0;
784
}
785

    
786
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
787
                               int64_t *ppos, int64_t pos_limit)
788
{
789
    RMDemuxContext *rm = s->priv_data;
790
    int64_t pos, dts;
791
    int stream_index2, flags, len, h;
792

    
793
    pos = *ppos;
794

    
795
    if(rm->old_format)
796
        return AV_NOPTS_VALUE;
797

    
798
    url_fseek(s->pb, pos, SEEK_SET);
799
    rm->remaining_len=0;
800
    for(;;){
801
        int seq=1;
802
        AVStream *st;
803

    
804
        len=sync(s, &dts, &flags, &stream_index2, &pos);
805
        if(len<0)
806
            return AV_NOPTS_VALUE;
807

    
808
        st = s->streams[stream_index2];
809
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
810
            h= get_byte(s->pb); len--;
811
            if(!(h & 0x40)){
812
                seq = get_byte(s->pb); len--;
813
            }
814
        }
815

    
816
        if((flags&2) && (seq&0x7F) == 1){
817
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
818
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
819
            if(stream_index2 == stream_index)
820
                break;
821
        }
822

    
823
        url_fskip(s->pb, len);
824
    }
825
    *ppos = pos;
826
    return dts;
827
}
828

    
829
AVInputFormat rm_demuxer = {
830
    "rm",
831
    NULL_IF_CONFIG_SMALL("RM format"),
832
    sizeof(RMDemuxContext),
833
    rm_probe,
834
    rm_read_header,
835
    rm_read_packet,
836
    rm_read_close,
837
    NULL,
838
    rm_read_dts,
839
};
840

    
841
AVInputFormat rdt_demuxer = {
842
    "rdt",
843
    NULL_IF_CONFIG_SMALL("RDT demuxer"),
844
    sizeof(RMDemuxContext),
845
    NULL,
846
    NULL,
847
    NULL,
848
    rm_read_close,
849
};