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ffmpeg / libavformat / rmdec.c @ 51d6852f

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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_freep(&rms->videobuf);
85
    av_freep(&rms->audiobuf);
86
}
87

    
88
static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
89
                                     AVStream *st, RMStream *ast, int read_all)
90
{
91
    char buf[256];
92
    uint32_t version;
93

    
94
    /* ra type header */
95
    version = get_be32(pb); /* version */
96
    if (((version >> 16) & 0xff) == 3) {
97
        int64_t startpos = url_ftell(pb);
98
        url_fskip(pb, 14);
99
        get_str8(pb, s->title, sizeof(s->title));
100
        get_str8(pb, s->author, sizeof(s->author));
101
        get_str8(pb, s->copyright, sizeof(s->copyright));
102
        get_str8(pb, s->comment, sizeof(s->comment));
103
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
104
            // fourcc (should always be "lpcJ")
105
            get_byte(pb);
106
            get_str8(pb, buf, sizeof(buf));
107
        }
108
        // Skip extra header crap (this should never happen)
109
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
110
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
111
        st->codec->sample_rate = 8000;
112
        st->codec->channels = 1;
113
        st->codec->codec_type = CODEC_TYPE_AUDIO;
114
        st->codec->codec_id = CODEC_ID_RA_144;
115
    } else {
116
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
117
        /* old version (4) */
118
        get_be32(pb); /* .ra4 */
119
        get_be32(pb); /* data size */
120
        get_be16(pb); /* version2 */
121
        get_be32(pb); /* header size */
122
        flavor= get_be16(pb); /* add codec info / flavor */
123
        ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
124
        get_be32(pb); /* ??? */
125
        get_be32(pb); /* ??? */
126
        get_be32(pb); /* ??? */
127
        ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
128
        st->codec->block_align= get_be16(pb); /* frame size */
129
        ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
130
        get_be16(pb); /* ??? */
131
        if (((version >> 16) & 0xff) == 5) {
132
            get_be16(pb); get_be16(pb); get_be16(pb);
133
        }
134
        st->codec->sample_rate = get_be16(pb);
135
        get_be32(pb);
136
        st->codec->channels = get_be16(pb);
137
        if (((version >> 16) & 0xff) == 5) {
138
            get_be32(pb);
139
            get_buffer(pb, buf, 4);
140
            buf[4] = 0;
141
        } else {
142
            get_str8(pb, buf, sizeof(buf)); /* desc */
143
            get_str8(pb, buf, sizeof(buf)); /* desc */
144
        }
145
        st->codec->codec_type = CODEC_TYPE_AUDIO;
146
        if (!strcmp(buf, "dnet")) {
147
            st->codec->codec_id = CODEC_ID_AC3;
148
            st->need_parsing = AVSTREAM_PARSE_FULL;
149
        } else if (!strcmp(buf, "28_8")) {
150
            st->codec->codec_id = CODEC_ID_RA_288;
151
            st->codec->extradata_size= 0;
152
            ast->audio_framesize = st->codec->block_align;
153
            st->codec->block_align = coded_framesize;
154

    
155
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
156
                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
157
                return -1;
158
            }
159

    
160
            ast->audiobuf = av_malloc(ast->audio_framesize * sub_packet_h);
161
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
162
            int codecdata_length;
163
            get_be16(pb); get_byte(pb);
164
            if (((version >> 16) & 0xff) == 5)
165
                get_byte(pb);
166
            codecdata_length = get_be32(pb);
167
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
168
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
169
                return -1;
170
            }
171

    
172
            if(sub_packet_size <= 0){
173
                av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
174
                return -1;
175
            }
176

    
177
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
178
            else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
179
            else st->codec->codec_id = CODEC_ID_ATRAC3;
180
            st->codec->extradata_size= codecdata_length;
181
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
182
            get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
183
            ast->audio_framesize = st->codec->block_align;
184
            st->codec->block_align = ast->sub_packet_size;
185

    
186
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
187
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
188
                return -1;
189
            }
190

    
191
            ast->audiobuf = av_malloc(ast->audio_framesize * sub_packet_h);
192
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
193
            int codecdata_length;
194
            get_be16(pb); get_byte(pb);
195
            if (((version >> 16) & 0xff) == 5)
196
                get_byte(pb);
197
            st->codec->codec_id = CODEC_ID_AAC;
198
            codecdata_length = get_be32(pb);
199
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
200
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
201
                return -1;
202
            }
203
            if (codecdata_length >= 1) {
204
                st->codec->extradata_size = codecdata_length - 1;
205
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
206
                get_byte(pb);
207
                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
208
            }
209
        } else {
210
            st->codec->codec_id = CODEC_ID_NONE;
211
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
212
        }
213
        if (read_all) {
214
            get_byte(pb);
215
            get_byte(pb);
216
            get_byte(pb);
217

    
218
            get_str8(pb, s->title, sizeof(s->title));
219
            get_str8(pb, s->author, sizeof(s->author));
220
            get_str8(pb, s->copyright, sizeof(s->copyright));
221
            get_str8(pb, s->comment, sizeof(s->comment));
222
        }
223
    }
224
    return 0;
225
}
226

    
227
int
228
ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
229
                           AVStream *st, RMStream *rst, int codec_data_size)
230
{
231
    unsigned int v;
232
    int size;
233
    int64_t codec_pos;
234

    
235
    av_set_pts_info(st, 64, 1, 1000);
236
    codec_pos = url_ftell(pb);
237
    v = get_be32(pb);
238
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
239
        /* ra type header */
240
        if (rm_read_audio_stream_info(s, pb, st, rst, 0))
241
            return -1;
242
    } else {
243
        int fps, fps2;
244
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
245
        fail1:
246
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
247
            goto skip;
248
        }
249
        st->codec->codec_tag = get_le32(pb);
250
//        av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
251
        if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
252
            && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
253
            && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
254
            && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
255
            && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
256
            goto fail1;
257
        st->codec->width = get_be16(pb);
258
        st->codec->height = get_be16(pb);
259
        st->codec->time_base.num= 1;
260
        fps= get_be16(pb);
261
        st->codec->codec_type = CODEC_TYPE_VIDEO;
262
        get_be32(pb);
263
        fps2= get_be16(pb);
264
        get_be16(pb);
265

    
266
        st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
267

    
268
        if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
269
            //check is redundant as get_buffer() will catch this
270
            av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
271
            return -1;
272
        }
273
        st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
274
        if (!st->codec->extradata)
275
            return AVERROR(ENOMEM);
276
        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
277

    
278
//        av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
279
        st->codec->time_base.den = fps * st->codec->time_base.num;
280
        switch(((uint8_t*)st->codec->extradata)[4]>>4){
281
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
282
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
283
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
284
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
285
        default: goto fail1;
286
        }
287
    }
288

    
289
skip:
290
    /* skip codec info */
291
    size = url_ftell(pb) - codec_pos;
292
    url_fskip(pb, codec_data_size - size);
293

    
294
    return 0;
295
}
296

    
297

    
298
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
299
{
300
    RMDemuxContext *rm = s->priv_data;
301
    AVStream *st;
302

    
303
    rm->old_format = 1;
304
    st = av_new_stream(s, 0);
305
    if (!st)
306
        return -1;
307
    st->priv_data = ff_rm_alloc_rmstream();
308
    return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
309
}
310

    
311
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
312
{
313
    RMDemuxContext *rm = s->priv_data;
314
    AVStream *st;
315
    ByteIOContext *pb = s->pb;
316
    unsigned int tag;
317
    int tag_size;
318
    unsigned int start_time, duration;
319
    char buf[128];
320
    int flags = 0;
321

    
322
    tag = get_le32(pb);
323
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
324
        /* very old .ra format */
325
        return rm_read_header_old(s, ap);
326
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
327
        return AVERROR(EIO);
328
    }
329

    
330
    get_be32(pb); /* header size */
331
    get_be16(pb);
332
    get_be32(pb);
333
    get_be32(pb); /* number of headers */
334

    
335
    for(;;) {
336
        if (url_feof(pb))
337
            return -1;
338
        tag = get_le32(pb);
339
        tag_size = get_be32(pb);
340
        get_be16(pb);
341
#if 0
342
        printf("tag=%c%c%c%c (%08x) size=%d\n",
343
               (tag) & 0xff,
344
               (tag >> 8) & 0xff,
345
               (tag >> 16) & 0xff,
346
               (tag >> 24) & 0xff,
347
               tag,
348
               tag_size);
349
#endif
350
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
351
            return -1;
352
        switch(tag) {
353
        case MKTAG('P', 'R', 'O', 'P'):
354
            /* file header */
355
            get_be32(pb); /* max bit rate */
356
            get_be32(pb); /* avg bit rate */
357
            get_be32(pb); /* max packet size */
358
            get_be32(pb); /* avg packet size */
359
            get_be32(pb); /* nb packets */
360
            get_be32(pb); /* duration */
361
            get_be32(pb); /* preroll */
362
            get_be32(pb); /* index offset */
363
            get_be32(pb); /* data offset */
364
            get_be16(pb); /* nb streams */
365
            flags = get_be16(pb); /* flags */
366
            break;
367
        case MKTAG('C', 'O', 'N', 'T'):
368
            get_str16(pb, s->title, sizeof(s->title));
369
            get_str16(pb, s->author, sizeof(s->author));
370
            get_str16(pb, s->copyright, sizeof(s->copyright));
371
            get_str16(pb, s->comment, sizeof(s->comment));
372
            break;
373
        case MKTAG('M', 'D', 'P', 'R'):
374
            st = av_new_stream(s, 0);
375
            if (!st)
376
                return AVERROR(ENOMEM);
377
            st->id = get_be16(pb);
378
            get_be32(pb); /* max bit rate */
379
            st->codec->bit_rate = get_be32(pb); /* bit rate */
380
            get_be32(pb); /* max packet size */
381
            get_be32(pb); /* avg packet size */
382
            start_time = get_be32(pb); /* start time */
383
            get_be32(pb); /* preroll */
384
            duration = get_be32(pb); /* duration */
385
            st->start_time = start_time;
386
            st->duration = duration;
387
            get_str8(pb, buf, sizeof(buf)); /* desc */
388
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
389
            st->codec->codec_type = CODEC_TYPE_DATA;
390
            st->priv_data = ff_rm_alloc_rmstream();
391
            if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
392
                                          get_be32(pb)) < 0)
393
                return -1;
394
            break;
395
        case MKTAG('D', 'A', 'T', 'A'):
396
            goto header_end;
397
        default:
398
            /* unknown tag: skip it */
399
            url_fskip(pb, tag_size - 10);
400
            break;
401
        }
402
    }
403
 header_end:
404
    rm->nb_packets = get_be32(pb); /* number of packets */
405
    if (!rm->nb_packets && (flags & 4))
406
        rm->nb_packets = 3600 * 25;
407
    get_be32(pb); /* next data header */
408
    return 0;
409
}
410

    
411
static int get_num(ByteIOContext *pb, int *len)
412
{
413
    int n, n1;
414

    
415
    n = get_be16(pb);
416
    (*len)-=2;
417
    n &= 0x7FFF;
418
    if (n >= 0x4000) {
419
        return n - 0x4000;
420
    } else {
421
        n1 = get_be16(pb);
422
        (*len)-=2;
423
        return (n << 16) | n1;
424
    }
425
}
426

    
427
/* multiple of 20 bytes for ra144 (ugly) */
428
#define RAW_PACKET_SIZE 1000
429

    
430
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
431
    RMDemuxContext *rm = s->priv_data;
432
    ByteIOContext *pb = s->pb;
433
    int len, num, res, i;
434
    AVStream *st;
435
    uint32_t state=0xFFFFFFFF;
436

    
437
    while(!url_feof(pb)){
438
        *pos= url_ftell(pb) - 3;
439
        if(rm->remaining_len > 0){
440
            num= rm->current_stream;
441
            len= rm->remaining_len;
442
            *timestamp = AV_NOPTS_VALUE;
443
            *flags= 0;
444
        }else{
445
            state= (state<<8) + get_byte(pb);
446

    
447
            if(state == MKBETAG('I', 'N', 'D', 'X')){
448
                len = get_be16(pb) - 6;
449
                if(len<0)
450
                    continue;
451
                goto skip;
452
            }
453

    
454
            if(state > (unsigned)0xFFFF || state < 12)
455
                continue;
456
            len=state;
457
            state= 0xFFFFFFFF;
458

    
459
            num = get_be16(pb);
460
            *timestamp = get_be32(pb);
461
            res= get_byte(pb); /* reserved */
462
            *flags = get_byte(pb); /* flags */
463

    
464

    
465
            len -= 12;
466
        }
467
        for(i=0;i<s->nb_streams;i++) {
468
            st = s->streams[i];
469
            if (num == st->id)
470
                break;
471
        }
472
        if (i == s->nb_streams) {
473
skip:
474
            /* skip packet if unknown number */
475
            url_fskip(pb, len);
476
            rm->remaining_len -= len;
477
            continue;
478
        }
479
        *stream_index= i;
480

    
481
        return len;
482
    }
483
    return -1;
484
}
485

    
486
static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
487
                                   RMDemuxContext *rm, RMStream *vst,
488
                                   AVPacket *pkt, int len)
489
{
490
    int hdr, seq, pic_num, len2, pos;
491
    int type;
492

    
493
    hdr = get_byte(pb); len--;
494
    type = hdr >> 6;
495
    switch(type){
496
    case 0: // slice
497
    case 2: // last slice
498
        seq = get_byte(pb); len--;
499
        len2 = get_num(pb, &len);
500
        pos = get_num(pb, &len);
501
        pic_num = get_byte(pb); len--;
502
        rm->remaining_len = len;
503
        break;
504
    case 1: //whole frame
505
        seq = get_byte(pb); len--;
506
        if(av_new_packet(pkt, len + 9) < 0)
507
            return AVERROR(EIO);
508
        pkt->data[0] = 0;
509
        AV_WL32(pkt->data + 1, 1);
510
        AV_WL32(pkt->data + 5, 0);
511
        get_buffer(pb, pkt->data + 9, len);
512
        rm->remaining_len = 0;
513
        return 0;
514
    case 3: //frame as a part of packet
515
        len2 = get_num(pb, &len);
516
        pos = get_num(pb, &len);
517
        pic_num = get_byte(pb); len--;
518
        rm->remaining_len = len - len2;
519
        if(av_new_packet(pkt, len2 + 9) < 0)
520
            return AVERROR(EIO);
521
        pkt->data[0] = 0;
522
        AV_WL32(pkt->data + 1, 1);
523
        AV_WL32(pkt->data + 5, 0);
524
        get_buffer(pb, pkt->data + 9, len2);
525
        return 0;
526
    }
527
    //now we have to deal with single slice
528

    
529
    if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
530
        vst->slices = ((hdr & 0x3F) << 1) + 1;
531
        vst->videobufsize = len2 + 8*vst->slices + 1;
532
        av_free(vst->videobuf);
533
        if(!(vst->videobuf = av_malloc(vst->videobufsize)))
534
            return AVERROR(ENOMEM);
535
        vst->videobufpos = 8*vst->slices + 1;
536
        vst->cur_slice = 0;
537
        vst->curpic_num = pic_num;
538
        vst->pktpos = url_ftell(pb);
539
    }
540
    if(type == 2)
541
        len = FFMIN(len, pos);
542

    
543
    if(++vst->cur_slice > vst->slices)
544
        return 1;
545
    AV_WL32(vst->videobuf - 7 + 8*vst->cur_slice, 1);
546
    AV_WL32(vst->videobuf - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
547
    if(vst->videobufpos + len > vst->videobufsize)
548
        return 1;
549
    if (get_buffer(pb, vst->videobuf + vst->videobufpos, len) != len)
550
        return AVERROR(EIO);
551
    vst->videobufpos += len;
552
    rm->remaining_len-= len;
553

    
554
    if(type == 2 || (vst->videobufpos) == vst->videobufsize){
555
         vst->videobuf[0] = vst->cur_slice-1;
556
         if(av_new_packet(pkt, vst->videobufpos - 8*(vst->slices - vst->cur_slice)) < 0)
557
             return AVERROR(ENOMEM);
558
         memcpy(pkt->data, vst->videobuf, 1 + 8*vst->cur_slice);
559
         memcpy(pkt->data + 1 + 8*vst->cur_slice, vst->videobuf + 1 + 8*vst->slices,
560
                vst->videobufpos - 1 - 8*vst->slices);
561
         pkt->pts = AV_NOPTS_VALUE;
562
         pkt->pos = vst->pktpos;
563
         return 0;
564
    }
565

    
566
    return 1;
567
}
568

    
569
static inline void
570
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
571
{
572
    uint8_t *ptr;
573
    int j;
574

    
575
    if (st->codec->codec_id == CODEC_ID_AC3) {
576
        ptr = pkt->data;
577
        for (j=0;j<pkt->size;j+=2) {
578
            FFSWAP(int, ptr[0], ptr[1]);
579
            ptr += 2;
580
        }
581
    }
582
}
583

    
584
int
585
ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
586
                    AVStream *st, RMStream *ast, int len, AVPacket *pkt,
587
                    int *seq, int *flags, int64_t *timestamp)
588
{
589
    RMDemuxContext *rm = s->priv_data;
590

    
591
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
592
        rm->current_stream= st->id;
593
        if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))
594
            return -1; //got partial frame
595
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
596
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
597
            (st->codec->codec_id == CODEC_ID_COOK) ||
598
            (st->codec->codec_id == CODEC_ID_ATRAC3) ||
599
            (st->codec->codec_id == CODEC_ID_SIPR)) {
600
            int x;
601
            int sps = ast->sub_packet_size;
602
            int cfs = ast->coded_framesize;
603
            int h = ast->sub_packet_h;
604
            int y = ast->sub_packet_cnt;
605
            int w = ast->audio_framesize;
606

    
607
            if (*flags & 2)
608
                y = ast->sub_packet_cnt = 0;
609
            if (!y)
610
                ast->audiotimestamp = *timestamp;
611

    
612
            switch(st->codec->codec_id) {
613
                case CODEC_ID_RA_288:
614
                    for (x = 0; x < h/2; x++)
615
                        get_buffer(pb, ast->audiobuf+x*2*w+y*cfs, cfs);
616
                    break;
617
                case CODEC_ID_ATRAC3:
618
                case CODEC_ID_COOK:
619
                    for (x = 0; x < w/sps; x++)
620
                        get_buffer(pb, ast->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
621
                    break;
622
            }
623

    
624
            if (++(ast->sub_packet_cnt) < h)
625
                return -1;
626
            else {
627
                ast->sub_packet_cnt = 0;
628
                rm->audio_stream_num = st->index;
629
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
630
                // Release first audio packet
631
                av_new_packet(pkt, st->codec->block_align);
632
                memcpy(pkt->data, ast->audiobuf, st->codec->block_align);
633
                *timestamp = ast->audiotimestamp;
634
                *flags = 2; // Mark first packet as keyframe
635
            }
636
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
637
            int x;
638
            rm->audio_stream_num = st->index;
639
            ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
640
            if (ast->sub_packet_cnt) {
641
                for (x = 0; x < ast->sub_packet_cnt; x++)
642
                    ast->sub_packet_lengths[x] = get_be16(pb);
643
                // Release first audio packet
644
                rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
645
                av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
646
                *flags = 2; // Mark first packet as keyframe
647
            }
648
        } else {
649
            av_get_packet(pb, pkt, len);
650
            rm_ac3_swap_bytes(st, pkt);
651
        }
652
    } else
653
        av_get_packet(pb, pkt, len);
654

    
655
    if(  (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
656
       || st->discard >= AVDISCARD_ALL){
657
        av_free_packet(pkt);
658
        return -1;
659
    }
660

    
661
    pkt->stream_index = st->index;
662

    
663
#if 0
664
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
665
        if(st->codec->codec_id == CODEC_ID_RV20){
666
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
667
            av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
668

669
            seq |= (*timestamp&~0x3FFF);
670
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
671
            if(seq - *timestamp < -0x2000) seq += 0x4000;
672
        }
673
    }
674
#endif
675

    
676
    pkt->pts= *timestamp;
677
    if (*flags & 2)
678
        pkt->flags |= PKT_FLAG_KEY;
679

    
680
    return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
681
}
682

    
683
int
684
ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
685
                      AVStream *st, RMStream *ast, AVPacket *pkt)
686
{
687
    RMDemuxContext *rm = s->priv_data;
688

    
689
    assert (rm->audio_pkt_cnt > 0);
690

    
691
    if (st->codec->codec_id == CODEC_ID_AAC)
692
        av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
693
    else {
694
        av_new_packet(pkt, st->codec->block_align);
695
        memcpy(pkt->data, ast->audiobuf + st->codec->block_align *
696
               (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
697
               st->codec->block_align);
698
    }
699
    rm->audio_pkt_cnt--;
700
    pkt->flags = 0;
701
    pkt->stream_index = st->index;
702

    
703
    return rm->audio_pkt_cnt;
704
}
705

    
706
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
707
{
708
    RMDemuxContext *rm = s->priv_data;
709
    ByteIOContext *pb = s->pb;
710
    AVStream *st;
711
    int i, len;
712
    int64_t timestamp, pos;
713
    int flags;
714

    
715
    if (rm->audio_pkt_cnt) {
716
        // If there are queued audio packet return them first
717
        st = s->streams[rm->audio_stream_num];
718
        ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
719
    } else if (rm->old_format) {
720
        RMStream *ast;
721

    
722
        st = s->streams[0];
723
        ast = st->priv_data;
724
        if (st->codec->codec_id == CODEC_ID_RA_288) {
725
            int x, y;
726

    
727
            for (y = 0; y < ast->sub_packet_h; y++)
728
                for (x = 0; x < ast->sub_packet_h/2; x++)
729
                    if (get_buffer(pb, ast->audiobuf+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
730
                        return AVERROR(EIO);
731
            rm->audio_stream_num = 0;
732
            rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
733
            // Release first audio packet
734
            av_new_packet(pkt, st->codec->block_align);
735
            memcpy(pkt->data, ast->audiobuf, st->codec->block_align);
736
            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
737
            pkt->stream_index = 0;
738
        } else {
739
            /* just read raw bytes */
740
            len = RAW_PACKET_SIZE;
741
            len= av_get_packet(pb, pkt, len);
742
            pkt->stream_index = 0;
743
            if (len <= 0) {
744
                return AVERROR(EIO);
745
            }
746
            pkt->size = len;
747
        }
748
        rm_ac3_swap_bytes(st, pkt);
749
    } else {
750
        int seq=1;
751
resync:
752
        len=sync(s, &timestamp, &flags, &i, &pos);
753
        if(len<0)
754
            return AVERROR(EIO);
755
        st = s->streams[i];
756

    
757
        if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
758
                                &seq, &flags, &timestamp) < 0)
759
            goto resync;
760

    
761
        if((flags&2) && (seq&0x7F) == 1)
762
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
763
    }
764

    
765
    return 0;
766
}
767

    
768
static int rm_read_close(AVFormatContext *s)
769
{
770
    int i;
771

    
772
    for (i=0;i<s->nb_streams;i++)
773
        ff_rm_free_rmstream(s->streams[i]->priv_data);
774

    
775
    return 0;
776
}
777

    
778
static int rm_probe(AVProbeData *p)
779
{
780
    /* check file header */
781
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
782
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
783
         p->buf[4] == 0 && p->buf[5] == 0) ||
784
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
785
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
786
        return AVPROBE_SCORE_MAX;
787
    else
788
        return 0;
789
}
790

    
791
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
792
                               int64_t *ppos, int64_t pos_limit)
793
{
794
    RMDemuxContext *rm = s->priv_data;
795
    int64_t pos, dts;
796
    int stream_index2, flags, len, h;
797

    
798
    pos = *ppos;
799

    
800
    if(rm->old_format)
801
        return AV_NOPTS_VALUE;
802

    
803
    url_fseek(s->pb, pos, SEEK_SET);
804
    rm->remaining_len=0;
805
    for(;;){
806
        int seq=1;
807
        AVStream *st;
808

    
809
        len=sync(s, &dts, &flags, &stream_index2, &pos);
810
        if(len<0)
811
            return AV_NOPTS_VALUE;
812

    
813
        st = s->streams[stream_index2];
814
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
815
            h= get_byte(s->pb); len--;
816
            if(!(h & 0x40)){
817
                seq = get_byte(s->pb); len--;
818
            }
819
        }
820

    
821
        if((flags&2) && (seq&0x7F) == 1){
822
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
823
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
824
            if(stream_index2 == stream_index)
825
                break;
826
        }
827

    
828
        url_fskip(s->pb, len);
829
    }
830
    *ppos = pos;
831
    return dts;
832
}
833

    
834
AVInputFormat rm_demuxer = {
835
    "rm",
836
    NULL_IF_CONFIG_SMALL("RM format"),
837
    sizeof(RMDemuxContext),
838
    rm_probe,
839
    rm_read_header,
840
    rm_read_packet,
841
    rm_read_close,
842
    NULL,
843
    rm_read_dts,
844
};
845

    
846
AVInputFormat rdt_demuxer = {
847
    "rdt",
848
    NULL_IF_CONFIG_SMALL("RDT demuxer"),
849
    sizeof(RMDemuxContext),
850
    NULL, NULL, NULL, rm_read_close, NULL, NULL
851
};