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ffmpeg / libavformat / rmdec.c @ 886e89d0

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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 *videobuf; ///< place to store merged video frame
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
    uint8_t *audiobuf; ///< place to store reordered audio data
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(rms->videobuf);
85
    av_free(rms->audiobuf);
86
    av_free(rms);
87
}
88

    
89
static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
90
                                     AVStream *st, RMStream *ast, int read_all)
91
{
92
    char buf[256];
93
    uint32_t version;
94

    
95
    /* ra type header */
96
    version = get_be32(pb); /* version */
97
    if (((version >> 16) & 0xff) == 3) {
98
        int64_t startpos = url_ftell(pb);
99
        url_fskip(pb, 14);
100
        get_str8(pb, s->title, sizeof(s->title));
101
        get_str8(pb, s->author, sizeof(s->author));
102
        get_str8(pb, s->copyright, sizeof(s->copyright));
103
        get_str8(pb, s->comment, sizeof(s->comment));
104
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
105
            // fourcc (should always be "lpcJ")
106
            get_byte(pb);
107
            get_str8(pb, buf, sizeof(buf));
108
        }
109
        // Skip extra header crap (this should never happen)
110
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
111
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
112
        st->codec->sample_rate = 8000;
113
        st->codec->channels = 1;
114
        st->codec->codec_type = CODEC_TYPE_AUDIO;
115
        st->codec->codec_id = CODEC_ID_RA_144;
116
    } else {
117
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
118
        /* old version (4) */
119
        get_be32(pb); /* .ra4 */
120
        get_be32(pb); /* data size */
121
        get_be16(pb); /* version2 */
122
        get_be32(pb); /* header size */
123
        flavor= get_be16(pb); /* add codec info / flavor */
124
        ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
125
        get_be32(pb); /* ??? */
126
        get_be32(pb); /* ??? */
127
        get_be32(pb); /* ??? */
128
        ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
129
        st->codec->block_align= get_be16(pb); /* frame size */
130
        ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
131
        get_be16(pb); /* ??? */
132
        if (((version >> 16) & 0xff) == 5) {
133
            get_be16(pb); get_be16(pb); get_be16(pb);
134
        }
135
        st->codec->sample_rate = get_be16(pb);
136
        get_be32(pb);
137
        st->codec->channels = get_be16(pb);
138
        if (((version >> 16) & 0xff) == 5) {
139
            get_be32(pb);
140
            get_buffer(pb, buf, 4);
141
            buf[4] = 0;
142
        } else {
143
            get_str8(pb, buf, sizeof(buf)); /* desc */
144
            get_str8(pb, buf, sizeof(buf)); /* desc */
145
        }
146
        st->codec->codec_type = CODEC_TYPE_AUDIO;
147
        if (!strcmp(buf, "dnet")) {
148
            st->codec->codec_id = CODEC_ID_AC3;
149
            st->need_parsing = AVSTREAM_PARSE_FULL;
150
        } else if (!strcmp(buf, "28_8")) {
151
            st->codec->codec_id = CODEC_ID_RA_288;
152
            st->codec->extradata_size= 0;
153
            ast->audio_framesize = st->codec->block_align;
154
            st->codec->block_align = coded_framesize;
155

    
156
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
157
                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
158
                return -1;
159
            }
160

    
161
            ast->audiobuf = av_malloc(ast->audio_framesize * sub_packet_h);
162
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
163
            int codecdata_length;
164
            get_be16(pb); get_byte(pb);
165
            if (((version >> 16) & 0xff) == 5)
166
                get_byte(pb);
167
            codecdata_length = get_be32(pb);
168
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
169
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
170
                return -1;
171
            }
172

    
173
            if(sub_packet_size <= 0){
174
                av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
175
                return -1;
176
            }
177

    
178
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
179
            else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
180
            else st->codec->codec_id = CODEC_ID_ATRAC3;
181
            st->codec->extradata_size= codecdata_length;
182
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
183
            get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
184
            ast->audio_framesize = st->codec->block_align;
185
            st->codec->block_align = ast->sub_packet_size;
186

    
187
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
188
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
189
                return -1;
190
            }
191

    
192
            ast->audiobuf = av_malloc(ast->audio_framesize * sub_packet_h);
193
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
194
            int codecdata_length;
195
            get_be16(pb); get_byte(pb);
196
            if (((version >> 16) & 0xff) == 5)
197
                get_byte(pb);
198
            st->codec->codec_id = CODEC_ID_AAC;
199
            codecdata_length = get_be32(pb);
200
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
201
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
202
                return -1;
203
            }
204
            if (codecdata_length >= 1) {
205
                st->codec->extradata_size = codecdata_length - 1;
206
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
207
                get_byte(pb);
208
                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
209
            }
210
        } else {
211
            st->codec->codec_id = CODEC_ID_NONE;
212
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
213
        }
214
        if (read_all) {
215
            get_byte(pb);
216
            get_byte(pb);
217
            get_byte(pb);
218

    
219
            get_str8(pb, s->title, sizeof(s->title));
220
            get_str8(pb, s->author, sizeof(s->author));
221
            get_str8(pb, s->copyright, sizeof(s->copyright));
222
            get_str8(pb, s->comment, sizeof(s->comment));
223
        }
224
    }
225
    return 0;
226
}
227

    
228
int
229
ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
230
                           AVStream *st, RMStream *rst, int codec_data_size)
231
{
232
    unsigned int v;
233
    int size;
234
    int64_t codec_pos;
235

    
236
    av_set_pts_info(st, 64, 1, 1000);
237
    codec_pos = url_ftell(pb);
238
    v = get_be32(pb);
239
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
240
        /* ra type header */
241
        if (rm_read_audio_stream_info(s, pb, st, rst, 0))
242
            return -1;
243
    } else {
244
        int fps, fps2;
245
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
246
        fail1:
247
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
248
            goto skip;
249
        }
250
        st->codec->codec_tag = get_le32(pb);
251
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
252
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
253
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
254
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
255
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
256
            && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
257
            goto fail1;
258
        st->codec->width = get_be16(pb);
259
        st->codec->height = get_be16(pb);
260
        st->codec->time_base.num= 1;
261
        fps= get_be16(pb);
262
        st->codec->codec_type = CODEC_TYPE_VIDEO;
263
        get_be32(pb);
264
        fps2= get_be16(pb);
265
        get_be16(pb);
266

    
267
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
268

    
269
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
270
            //check is redundant as get_buffer() will catch this
271
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
272
            return -1;
273
        }
274
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
275
        if (!st->codec->extradata)
276
            return AVERROR(ENOMEM);
277
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
278

    
279
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
280
        st->codec->time_base.den = fps * st->codec->time_base.num;
281
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
282
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
283
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
284
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
285
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
286
        default: goto fail1;
287
        }
288
    }
289

    
290
skip:
291
    /* skip codec info */
292
    size = url_ftell(pb) - codec_pos;
293
    url_fskip(pb, codec_data_size - size);
294

    
295
    return 0;
296
}
297

    
298

    
299
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
300
{
301
    RMDemuxContext *rm = s->priv_data;
302
    AVStream *st;
303

    
304
    rm->old_format = 1;
305
    st = av_new_stream(s, 0);
306
    if (!st)
307
        return -1;
308
    st->priv_data = ff_rm_alloc_rmstream();
309
    return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
310
}
311

    
312
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
313
{
314
    RMDemuxContext *rm = s->priv_data;
315
    AVStream *st;
316
    ByteIOContext *pb = s->pb;
317
    unsigned int tag;
318
    int tag_size;
319
    unsigned int start_time, duration;
320
    char buf[128];
321
    int flags = 0;
322

    
323
    tag = get_le32(pb);
324
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
325
        /* very old .ra format */
326
        return rm_read_header_old(s, ap);
327
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
328
        return AVERROR(EIO);
329
    }
330

    
331
    get_be32(pb); /* header size */
332
    get_be16(pb);
333
    get_be32(pb);
334
    get_be32(pb); /* number of headers */
335

    
336
    for(;;) {
337
        if (url_feof(pb))
338
            return -1;
339
        tag = get_le32(pb);
340
        tag_size = get_be32(pb);
341
        get_be16(pb);
342
#if 0
343
        printf("tag=%c%c%c%c (%08x) size=%d\n",
344
               (tag) & 0xff,
345
               (tag >> 8) & 0xff,
346
               (tag >> 16) & 0xff,
347
               (tag >> 24) & 0xff,
348
               tag,
349
               tag_size);
350
#endif
351
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
352
            return -1;
353
        switch(tag) {
354
        case MKTAG('P', 'R', 'O', 'P'):
355
            /* file header */
356
            get_be32(pb); /* max bit rate */
357
            get_be32(pb); /* avg bit rate */
358
            get_be32(pb); /* max packet size */
359
            get_be32(pb); /* avg packet size */
360
            get_be32(pb); /* nb packets */
361
            get_be32(pb); /* duration */
362
            get_be32(pb); /* preroll */
363
            get_be32(pb); /* index offset */
364
            get_be32(pb); /* data offset */
365
            get_be16(pb); /* nb streams */
366
            flags = get_be16(pb); /* flags */
367
            break;
368
        case MKTAG('C', 'O', 'N', 'T'):
369
            get_str16(pb, s->title, sizeof(s->title));
370
            get_str16(pb, s->author, sizeof(s->author));
371
            get_str16(pb, s->copyright, sizeof(s->copyright));
372
            get_str16(pb, s->comment, sizeof(s->comment));
373
            break;
374
        case MKTAG('M', 'D', 'P', 'R'):
375
            st = av_new_stream(s, 0);
376
            if (!st)
377
                return AVERROR(ENOMEM);
378
            st->id = get_be16(pb);
379
            get_be32(pb); /* max bit rate */
380
            st->codec->bit_rate = get_be32(pb); /* bit rate */
381
            get_be32(pb); /* max packet size */
382
            get_be32(pb); /* avg packet size */
383
            start_time = get_be32(pb); /* start time */
384
            get_be32(pb); /* preroll */
385
            duration = get_be32(pb); /* duration */
386
            st->start_time = start_time;
387
            st->duration = duration;
388
            get_str8(pb, buf, sizeof(buf)); /* desc */
389
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
390
            st->codec->codec_type = CODEC_TYPE_DATA;
391
            st->priv_data = ff_rm_alloc_rmstream();
392
            if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
393
                                          get_be32(pb)) < 0)
394
                return -1;
395
            break;
396
        case MKTAG('D', 'A', 'T', 'A'):
397
            goto header_end;
398
        default:
399
            /* unknown tag: skip it */
400
            url_fskip(pb, tag_size - 10);
401
            break;
402
        }
403
    }
404
 header_end:
405
    rm->nb_packets = get_be32(pb); /* number of packets */
406
    if (!rm->nb_packets && (flags & 4))
407
        rm->nb_packets = 3600 * 25;
408
    get_be32(pb); /* next data header */
409
    return 0;
410
}
411

    
412
static int get_num(ByteIOContext *pb, int *len)
413
{
414
    int n, n1;
415

    
416
    n = get_be16(pb);
417
    (*len)-=2;
418
    n &= 0x7FFF;
419
    if (n >= 0x4000) {
420
        return n - 0x4000;
421
    } else {
422
        n1 = get_be16(pb);
423
        (*len)-=2;
424
        return (n << 16) | n1;
425
    }
426
}
427

    
428
/* multiple of 20 bytes for ra144 (ugly) */
429
#define RAW_PACKET_SIZE 1000
430

    
431
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
432
    RMDemuxContext *rm = s->priv_data;
433
    ByteIOContext *pb = s->pb;
434
    int len, num, res, i;
435
    AVStream *st;
436
    uint32_t state=0xFFFFFFFF;
437

    
438
    while(!url_feof(pb)){
439
        *pos= url_ftell(pb) - 3;
440
        if(rm->remaining_len > 0){
441
            num= rm->current_stream;
442
            len= rm->remaining_len;
443
            *timestamp = AV_NOPTS_VALUE;
444
            *flags= 0;
445
        }else{
446
            state= (state<<8) + get_byte(pb);
447

    
448
            if(state == MKBETAG('I', 'N', 'D', 'X')){
449
                len = get_be16(pb) - 6;
450
                if(len<0)
451
                    continue;
452
                goto skip;
453
            }
454

    
455
            if(state > (unsigned)0xFFFF || state < 12)
456
                continue;
457
            len=state;
458
            state= 0xFFFFFFFF;
459

    
460
            num = get_be16(pb);
461
            *timestamp = get_be32(pb);
462
            res= get_byte(pb); /* reserved */
463
            *flags = get_byte(pb); /* flags */
464

    
465

    
466
            len -= 12;
467
        }
468
        for(i=0;i<s->nb_streams;i++) {
469
            st = s->streams[i];
470
            if (num == st->id)
471
                break;
472
        }
473
        if (i == s->nb_streams) {
474
skip:
475
            /* skip packet if unknown number */
476
            url_fskip(pb, len);
477
            rm->remaining_len -= len;
478
            continue;
479
        }
480
        *stream_index= i;
481

    
482
        return len;
483
    }
484
    return -1;
485
}
486

    
487
static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
488
                                   RMDemuxContext *rm, RMStream *vst,
489
                                   AVPacket *pkt, int len)
490
{
491
    int hdr, seq, pic_num, len2, pos;
492
    int type;
493

    
494
    hdr = get_byte(pb); len--;
495
    type = hdr >> 6;
496
    switch(type){
497
    case 0: // slice
498
    case 2: // last slice
499
        seq = get_byte(pb); len--;
500
        len2 = get_num(pb, &len);
501
        pos = get_num(pb, &len);
502
        pic_num = get_byte(pb); len--;
503
        rm->remaining_len = len;
504
        break;
505
    case 1: //whole frame
506
        seq = get_byte(pb); len--;
507
        if(av_new_packet(pkt, len + 9) < 0)
508
            return AVERROR(EIO);
509
        pkt->data[0] = 0;
510
        AV_WL32(pkt->data + 1, 1);
511
        AV_WL32(pkt->data + 5, 0);
512
        get_buffer(pb, pkt->data + 9, len);
513
        rm->remaining_len = 0;
514
        return 0;
515
    case 3: //frame as a part of packet
516
        len2 = get_num(pb, &len);
517
        pos = get_num(pb, &len);
518
        pic_num = get_byte(pb); len--;
519
        rm->remaining_len = len - len2;
520
        if(av_new_packet(pkt, len2 + 9) < 0)
521
            return AVERROR(EIO);
522
        pkt->data[0] = 0;
523
        AV_WL32(pkt->data + 1, 1);
524
        AV_WL32(pkt->data + 5, 0);
525
        get_buffer(pb, pkt->data + 9, len2);
526
        return 0;
527
    }
528
    //now we have to deal with single slice
529

    
530
    if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
531
        vst->slices = ((hdr & 0x3F) << 1) + 1;
532
        vst->videobufsize = len2 + 8*vst->slices + 1;
533
        av_free(vst->videobuf);
534
        if(!(vst->videobuf = av_malloc(vst->videobufsize)))
535
            return AVERROR(ENOMEM);
536
        vst->videobufpos = 8*vst->slices + 1;
537
        vst->cur_slice = 0;
538
        vst->curpic_num = pic_num;
539
        vst->pktpos = url_ftell(pb);
540
    }
541
    if(type == 2)
542
        len = FFMIN(len, pos);
543

    
544
    if(++vst->cur_slice > vst->slices)
545
        return 1;
546
    AV_WL32(vst->videobuf - 7 + 8*vst->cur_slice, 1);
547
    AV_WL32(vst->videobuf - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
548
    if(vst->videobufpos + len > vst->videobufsize)
549
        return 1;
550
    if (get_buffer(pb, vst->videobuf + vst->videobufpos, len) != len)
551
        return AVERROR(EIO);
552
    vst->videobufpos += len;
553
    rm->remaining_len-= len;
554

    
555
    if(type == 2 || (vst->videobufpos) == vst->videobufsize){
556
         vst->videobuf[0] = vst->cur_slice-1;
557
         if(av_new_packet(pkt, vst->videobufpos - 8*(vst->slices - vst->cur_slice)) < 0)
558
             return AVERROR(ENOMEM);
559
         memcpy(pkt->data, vst->videobuf, 1 + 8*vst->cur_slice);
560
         memcpy(pkt->data + 1 + 8*vst->cur_slice, vst->videobuf + 1 + 8*vst->slices,
561
                vst->videobufpos - 1 - 8*vst->slices);
562
         pkt->pts = AV_NOPTS_VALUE;
563
         pkt->pos = vst->pktpos;
564
         return 0;
565
    }
566

    
567
    return 1;
568
}
569

    
570
static inline void
571
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
572
{
573
    uint8_t *ptr;
574
    int j;
575

    
576
    if (st->codec->codec_id == CODEC_ID_AC3) {
577
        ptr = pkt->data;
578
        for (j=0;j<pkt->size;j+=2) {
579
            FFSWAP(int, ptr[0], ptr[1]);
580
            ptr += 2;
581
        }
582
    }
583
}
584

    
585
int
586
ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
587
                    AVStream *st, RMStream *ast, int len, AVPacket *pkt,
588
                    int *seq, int *flags, int64_t *timestamp)
589
{
590
    RMDemuxContext *rm = s->priv_data;
591

    
592
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
593
        rm->current_stream= st->id;
594
        if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len) == 1)
595
            return -1; //got partial frame
596
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
597
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
598
            (st->codec->codec_id == CODEC_ID_COOK) ||
599
            (st->codec->codec_id == CODEC_ID_ATRAC3) ||
600
            (st->codec->codec_id == CODEC_ID_SIPR)) {
601
            int x;
602
            int sps = ast->sub_packet_size;
603
            int cfs = ast->coded_framesize;
604
            int h = ast->sub_packet_h;
605
            int y = ast->sub_packet_cnt;
606
            int w = ast->audio_framesize;
607

    
608
            if (*flags & 2)
609
                y = ast->sub_packet_cnt = 0;
610
            if (!y)
611
                ast->audiotimestamp = *timestamp;
612

    
613
            switch(st->codec->codec_id) {
614
                case CODEC_ID_RA_288:
615
                    for (x = 0; x < h/2; x++)
616
                        get_buffer(pb, ast->audiobuf+x*2*w+y*cfs, cfs);
617
                    break;
618
                case CODEC_ID_ATRAC3:
619
                case CODEC_ID_COOK:
620
                    for (x = 0; x < w/sps; x++)
621
                        get_buffer(pb, ast->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
622
                    break;
623
            }
624

    
625
            if (++(ast->sub_packet_cnt) < h)
626
                return -1;
627
            else {
628
                ast->sub_packet_cnt = 0;
629
                rm->audio_stream_num = st->index;
630
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
631
                // Release first audio packet
632
                av_new_packet(pkt, st->codec->block_align);
633
                memcpy(pkt->data, ast->audiobuf, st->codec->block_align);
634
                *timestamp = ast->audiotimestamp;
635
                *flags = 2; // Mark first packet as keyframe
636
            }
637
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
638
            int x;
639
            rm->audio_stream_num = st->index;
640
            ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
641
            if (ast->sub_packet_cnt) {
642
                for (x = 0; x < ast->sub_packet_cnt; x++)
643
                    ast->sub_packet_lengths[x] = get_be16(pb);
644
                // Release first audio packet
645
                rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
646
                av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
647
                *flags = 2; // Mark first packet as keyframe
648
            }
649
        } else {
650
            av_get_packet(pb, pkt, len);
651
            rm_ac3_swap_bytes(st, pkt);
652
        }
653
    } else
654
        av_get_packet(pb, pkt, len);
655

    
656
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
657
       || st->discard >= AVDISCARD_ALL){
658
        av_free_packet(pkt);
659
        return -1;
660
    }
661

    
662
    pkt->stream_index = st->index;
663

    
664
#if 0
665
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
666
        if(st->codec->codec_id == CODEC_ID_RV20){
667
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
668
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
669

670
            seq |= (*timestamp&~0x3FFF);
671
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
672
            if(seq - *timestamp < -0x2000) seq += 0x4000;
673
        }
674
    }
675
#endif
676

    
677
    pkt->pts= *timestamp;
678
    if (*flags & 2)
679
        pkt->flags |= PKT_FLAG_KEY;
680

    
681
    return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
682
}
683

    
684
void
685
ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
686
                      AVStream *st, RMStream *ast, AVPacket *pkt)
687
{
688
    RMDemuxContext *rm = s->priv_data;
689

    
690
    assert (rm->audio_pkt_cnt > 0);
691

    
692
    if (st->codec->codec_id == CODEC_ID_AAC)
693
        av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
694
    else {
695
        av_new_packet(pkt, st->codec->block_align);
696
        memcpy(pkt->data, ast->audiobuf + st->codec->block_align *
697
               (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
698
               st->codec->block_align);
699
    }
700
    rm->audio_pkt_cnt--;
701
    pkt->flags = 0;
702
    pkt->stream_index = st->index;
703
}
704

    
705
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
706
{
707
    RMDemuxContext *rm = s->priv_data;
708
    ByteIOContext *pb = s->pb;
709
    AVStream *st;
710
    int i, len;
711
    int64_t timestamp, pos;
712
    int flags;
713

    
714
    if (rm->audio_pkt_cnt) {
715
        // If there are queued audio packet return them first
716
        st = s->streams[rm->audio_stream_num];
717
        ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
718
    } else if (rm->old_format) {
719
        RMStream *ast;
720

    
721
        st = s->streams[0];
722
        ast = st->priv_data;
723
        if (st->codec->codec_id == CODEC_ID_RA_288) {
724
            int x, y;
725

    
726
            for (y = 0; y < ast->sub_packet_h; y++)
727
                for (x = 0; x < ast->sub_packet_h/2; x++)
728
                    if (get_buffer(pb, ast->audiobuf+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
729
                        return AVERROR(EIO);
730
            rm->audio_stream_num = 0;
731
            rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
732
            // Release first audio packet
733
            av_new_packet(pkt, st->codec->block_align);
734
            memcpy(pkt->data, ast->audiobuf, st->codec->block_align);
735
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
736
            pkt->stream_index = 0;
737
        } else {
738
            /* just read raw bytes */
739
            len = RAW_PACKET_SIZE;
740
            len= av_get_packet(pb, pkt, len);
741
            pkt->stream_index = 0;
742
            if (len <= 0) {
743
                return AVERROR(EIO);
744
            }
745
            pkt->size = len;
746
        }
747
        rm_ac3_swap_bytes(st, pkt);
748
    } else {
749
        int seq=1;
750
resync:
751
        len=sync(s, &timestamp, &flags, &i, &pos);
752
        if(len<0)
753
            return AVERROR(EIO);
754
        st = s->streams[i];
755

    
756
        if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
757
                                &seq, &flags, &timestamp) < 0)
758
            goto resync;
759

    
760
        if((flags&2) && (seq&0x7F) == 1)
761
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
762
    }
763

    
764
    return 0;
765
}
766

    
767
static int rm_read_close(AVFormatContext *s)
768
{
769
    int i;
770

    
771
    for (i=0;i<s->nb_streams;i++)
772
        ff_rm_free_rmstream(s->streams[i]->priv_data);
773

    
774
    return 0;
775
}
776

    
777
static int rm_probe(AVProbeData *p)
778
{
779
    /* check file header */
780
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
781
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
782
         p->buf[4] == 0 && p->buf[5] == 0) ||
783
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
784
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
785
        return AVPROBE_SCORE_MAX;
786
    else
787
        return 0;
788
}
789

    
790
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
791
                               int64_t *ppos, int64_t pos_limit)
792
{
793
    RMDemuxContext *rm = s->priv_data;
794
    int64_t pos, dts;
795
    int stream_index2, flags, len, h;
796

    
797
    pos = *ppos;
798

    
799
    if(rm->old_format)
800
        return AV_NOPTS_VALUE;
801

    
802
    url_fseek(s->pb, pos, SEEK_SET);
803
    rm->remaining_len=0;
804
    for(;;){
805
        int seq=1;
806
        AVStream *st;
807

    
808
        len=sync(s, &dts, &flags, &stream_index2, &pos);
809
        if(len<0)
810
            return AV_NOPTS_VALUE;
811

    
812
        st = s->streams[stream_index2];
813
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
814
            h= get_byte(s->pb); len--;
815
            if(!(h & 0x40)){
816
                seq = get_byte(s->pb); len--;
817
            }
818
        }
819

    
820
        if((flags&2) && (seq&0x7F) == 1){
821
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
822
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
823
            if(stream_index2 == stream_index)
824
                break;
825
        }
826

    
827
        url_fskip(s->pb, len);
828
    }
829
    *ppos = pos;
830
    return dts;
831
}
832

    
833
AVInputFormat rm_demuxer = {
834
    "rm",
835
    NULL_IF_CONFIG_SMALL("RM format"),
836
    sizeof(RMDemuxContext),
837
    rm_probe,
838
    rm_read_header,
839
    rm_read_packet,
840
    rm_read_close,
841
    NULL,
842
    rm_read_dts,
843
};
844

    
845
AVInputFormat rdt_demuxer = {
846
    "rdt",
847
    NULL_IF_CONFIG_SMALL("RDT demuxer"),
848
    sizeof(RMDemuxContext),
849
    NULL, NULL, NULL, rm_read_close, NULL, NULL
850
};