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ffmpeg / libavformat / rmdec.c @ 72415b2a

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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
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 * License along with FFmpeg; if not, write to the Free Software
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 * 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 "riff.h"
26
#include "rm.h"
27

    
28
struct RMStream {
29
    AVPacket pkt;      ///< place to store merged video frame / reordered audio data
30
    int videobufsize;  ///< current assembled frame size
31
    int videobufpos;   ///< position for the next slice in the video buffer
32
    int curpic_num;    ///< picture number of current frame
33
    int cur_slice, slices;
34
    int64_t pktpos;    ///< first slice position in file
35
    /// Audio descrambling matrix parameters
36
    int64_t audiotimestamp; ///< Audio packet timestamp
37
    int sub_packet_cnt; // Subpacket counter, used while reading
38
    int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
39
    int audio_framesize; /// Audio frame size from container
40
    int sub_packet_lengths[16]; /// Length of each subpacket
41
};
42

    
43
typedef struct {
44
    int nb_packets;
45
    int old_format;
46
    int current_stream;
47
    int remaining_len;
48
    int audio_stream_num; ///< Stream number for audio packets
49
    int audio_pkt_cnt; ///< Output packet counter
50
} RMDemuxContext;
51

    
52
static const AVCodecTag rm_codec_tags[] = {
53
    { CODEC_ID_RV10,   MKTAG('R','V','1','0') },
54
    { CODEC_ID_RV20,   MKTAG('R','V','2','0') },
55
    { CODEC_ID_RV20,   MKTAG('R','V','T','R') },
56
    { CODEC_ID_RV30,   MKTAG('R','V','3','0') },
57
    { CODEC_ID_RV40,   MKTAG('R','V','4','0') },
58
    { CODEC_ID_AC3,    MKTAG('d','n','e','t') },
59
    { CODEC_ID_RA_144, MKTAG('l','p','c','J') },
60
    { CODEC_ID_RA_288, MKTAG('2','8','_','8') },
61
    { CODEC_ID_COOK,   MKTAG('c','o','o','k') },
62
    { CODEC_ID_ATRAC3, MKTAG('a','t','r','c') },
63
    { CODEC_ID_SIPR,   MKTAG('s','i','p','r') },
64
    { CODEC_ID_AAC,    MKTAG('r','a','a','c') },
65
    { CODEC_ID_AAC,    MKTAG('r','a','c','p') },
66
    { CODEC_ID_NONE },
67
};
68

    
69
static const unsigned char sipr_swaps[38][2] = {
70
    {  0, 63 }, {  1, 22 }, {  2, 44 }, {  3, 90 },
71
    {  5, 81 }, {  7, 31 }, {  8, 86 }, {  9, 58 },
72
    { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
73
    { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
74
    { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
75
    { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
76
    { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
77
    { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
78
    { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
79
    { 67, 83 }, { 77, 80 }
80
};
81

    
82
const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
83

    
84
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
85
{
86
    int i;
87
    char *q, r;
88

    
89
    q = buf;
90
    for(i=0;i<len;i++) {
91
        r = get_byte(pb);
92
        if (i < buf_size - 1)
93
            *q++ = r;
94
    }
95
    if (buf_size > 0) *q = '\0';
96
}
97

    
98
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
99
{
100
    get_strl(pb, buf, buf_size, get_byte(pb));
101
}
102

    
103
static int rm_read_extradata(ByteIOContext *pb, AVCodecContext *avctx, unsigned size)
104
{
105
    if (size >= 1<<24)
106
        return -1;
107
    avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
108
    if (!avctx->extradata)
109
        return AVERROR_NOMEM;
110
    avctx->extradata_size = get_buffer(pb, avctx->extradata, size);
111
    memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
112
    if (avctx->extradata_size != size)
113
        return AVERROR(EIO);
114
    return 0;
115
}
116

    
117
static void rm_read_metadata(AVFormatContext *s, int wide)
118
{
119
    char buf[1024];
120
    int i;
121
    for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
122
        int len = wide ? get_be16(s->pb) : get_byte(s->pb);
123
        get_strl(s->pb, buf, sizeof(buf), len);
124
        av_metadata_set(&s->metadata, ff_rm_metadata[i], buf);
125
    }
126
}
127

    
128
RMStream *ff_rm_alloc_rmstream (void)
129
{
130
    RMStream *rms = av_mallocz(sizeof(RMStream));
131
    rms->curpic_num = -1;
132
    return rms;
133
}
134

    
135
void ff_rm_free_rmstream (RMStream *rms)
136
{
137
    av_free_packet(&rms->pkt);
138
}
139

    
140
static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
141
                                     AVStream *st, RMStream *ast, int read_all)
142
{
143
    char buf[256];
144
    uint32_t version;
145
    int ret;
146

    
147
    /* ra type header */
148
    version = get_be16(pb); /* version */
149
    if (version == 3) {
150
        int header_size = get_be16(pb);
151
        int64_t startpos = url_ftell(pb);
152
        url_fskip(pb, 14);
153
        rm_read_metadata(s, 0);
154
        if ((startpos + header_size) >= url_ftell(pb) + 2) {
155
            // fourcc (should always be "lpcJ")
156
            get_byte(pb);
157
            get_str8(pb, buf, sizeof(buf));
158
        }
159
        // Skip extra header crap (this should never happen)
160
        if ((startpos + header_size) > url_ftell(pb))
161
            url_fskip(pb, header_size + startpos - url_ftell(pb));
162
        st->codec->sample_rate = 8000;
163
        st->codec->channels = 1;
164
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
165
        st->codec->codec_id = CODEC_ID_RA_144;
166
    } else {
167
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
168
        int codecdata_length;
169
        /* old version (4) */
170
        url_fskip(pb, 2); /* unused */
171
        get_be32(pb); /* .ra4 */
172
        get_be32(pb); /* data size */
173
        get_be16(pb); /* version2 */
174
        get_be32(pb); /* header size */
175
        flavor= get_be16(pb); /* add codec info / flavor */
176
        ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
177
        get_be32(pb); /* ??? */
178
        get_be32(pb); /* ??? */
179
        get_be32(pb); /* ??? */
180
        ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
181
        st->codec->block_align= get_be16(pb); /* frame size */
182
        ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
183
        get_be16(pb); /* ??? */
184
        if (version == 5) {
185
            get_be16(pb); get_be16(pb); get_be16(pb);
186
        }
187
        st->codec->sample_rate = get_be16(pb);
188
        get_be32(pb);
189
        st->codec->channels = get_be16(pb);
190
        if (version == 5) {
191
            get_be32(pb);
192
            get_buffer(pb, buf, 4);
193
            buf[4] = 0;
194
        } else {
195
            get_str8(pb, buf, sizeof(buf)); /* desc */
196
            get_str8(pb, buf, sizeof(buf)); /* desc */
197
        }
198
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
199
        st->codec->codec_tag  = AV_RL32(buf);
200
        st->codec->codec_id   = ff_codec_get_id(rm_codec_tags, st->codec->codec_tag);
201
        switch (st->codec->codec_id) {
202
        case CODEC_ID_AC3:
203
            st->need_parsing = AVSTREAM_PARSE_FULL;
204
            break;
205
        case CODEC_ID_RA_288:
206
            st->codec->extradata_size= 0;
207
            ast->audio_framesize = st->codec->block_align;
208
            st->codec->block_align = coded_framesize;
209

    
210
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
211
                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
212
                return -1;
213
            }
214

    
215
            av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
216
            break;
217
        case CODEC_ID_COOK:
218
        case CODEC_ID_ATRAC3:
219
        case CODEC_ID_SIPR:
220
            get_be16(pb); get_byte(pb);
221
            if (version == 5)
222
                get_byte(pb);
223
            codecdata_length = get_be32(pb);
224
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
225
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
226
                return -1;
227
            }
228

    
229
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
230
            else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
231
            else st->codec->codec_id = CODEC_ID_ATRAC3;
232

    
233
            ast->audio_framesize = st->codec->block_align;
234
            if (st->codec->codec_id == CODEC_ID_SIPR) {
235
                if (flavor > 3) {
236
                    av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
237
                           flavor);
238
                    return -1;
239
                }
240
                st->codec->block_align = ff_sipr_subpk_size[flavor];
241
            } else {
242
                if(sub_packet_size <= 0){
243
                    av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
244
                    return -1;
245
                }
246
                st->codec->block_align = ast->sub_packet_size;
247
            }
248
            if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
249
                return ret;
250

    
251
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
252
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
253
                return -1;
254
            }
255

    
256
            av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
257
            break;
258
        case CODEC_ID_AAC:
259
            get_be16(pb); get_byte(pb);
260
            if (version == 5)
261
                get_byte(pb);
262
            st->codec->codec_id = CODEC_ID_AAC;
263
            codecdata_length = get_be32(pb);
264
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
265
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
266
                return -1;
267
            }
268
            if (codecdata_length >= 1) {
269
                get_byte(pb);
270
                if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
271
                    return ret;
272
            }
273
            break;
274
        default:
275
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
276
        }
277
        if (read_all) {
278
            get_byte(pb);
279
            get_byte(pb);
280
            get_byte(pb);
281
            rm_read_metadata(s, 0);
282
        }
283
    }
284
    return 0;
285
}
286

    
287
int
288
ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
289
                           AVStream *st, RMStream *rst, int codec_data_size)
290
{
291
    unsigned int v;
292
    int size;
293
    int64_t codec_pos;
294
    int ret;
295

    
296
    av_set_pts_info(st, 64, 1, 1000);
297
    codec_pos = url_ftell(pb);
298
    v = get_be32(pb);
299
    if (v == MKTAG(0xfd, 'a', 'r', '.')) {
300
        /* ra type header */
301
        if (rm_read_audio_stream_info(s, pb, st, rst, 0))
302
            return -1;
303
    } else {
304
        int fps, fps2;
305
        if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
306
        fail1:
307
            av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
308
            goto skip;
309
        }
310
        st->codec->codec_tag = get_le32(pb);
311
        st->codec->codec_id  = ff_codec_get_id(rm_codec_tags, st->codec->codec_tag);
312
//        av_log(s, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
313
        if (st->codec->codec_id == CODEC_ID_NONE)
314
            goto fail1;
315
        st->codec->width = get_be16(pb);
316
        st->codec->height = get_be16(pb);
317
        st->codec->time_base.num= 1;
318
        fps= get_be16(pb);
319
        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
320
        get_be32(pb);
321
        fps2= get_be16(pb);
322
        get_be16(pb);
323

    
324
        if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (url_ftell(pb) - codec_pos))) < 0)
325
            return ret;
326

    
327
//        av_log(s, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
328
        st->codec->time_base.den = fps * st->codec->time_base.num;
329
        //XXX: do we really need that?
330
        switch(st->codec->extradata[4]>>4){
331
        case 1: st->codec->codec_id = CODEC_ID_RV10; break;
332
        case 2: st->codec->codec_id = CODEC_ID_RV20; break;
333
        case 3: st->codec->codec_id = CODEC_ID_RV30; break;
334
        case 4: st->codec->codec_id = CODEC_ID_RV40; break;
335
        default:
336
            av_log(st->codec, AV_LOG_ERROR, "extra:%02X %02X %02X %02X %02X\n", st->codec->extradata[0], st->codec->extradata[1], st->codec->extradata[2], st->codec->extradata[3], st->codec->extradata[4]);
337
            goto fail1;
338
        }
339
    }
340

    
341
skip:
342
    /* skip codec info */
343
    size = url_ftell(pb) - codec_pos;
344
    url_fskip(pb, codec_data_size - size);
345

    
346
    return 0;
347
}
348

    
349
/** this function assumes that the demuxer has already seeked to the start
350
 * of the INDX chunk, and will bail out if not. */
351
static int rm_read_index(AVFormatContext *s)
352
{
353
    ByteIOContext *pb = s->pb;
354
    unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
355
    AVStream *st;
356

    
357
    do {
358
        if (get_le32(pb) != MKTAG('I','N','D','X'))
359
            return -1;
360
        size     = get_be32(pb);
361
        if (size < 20)
362
            return -1;
363
        url_fskip(pb, 2);
364
        n_pkts   = get_be32(pb);
365
        str_id   = get_be16(pb);
366
        next_off = get_be32(pb);
367
        for (n = 0; n < s->nb_streams; n++)
368
            if (s->streams[n]->id == str_id) {
369
                st = s->streams[n];
370
                break;
371
            }
372
        if (n == s->nb_streams)
373
            goto skip;
374

    
375
        for (n = 0; n < n_pkts; n++) {
376
            url_fskip(pb, 2);
377
            pts = get_be32(pb);
378
            pos = get_be32(pb);
379
            url_fskip(pb, 4); /* packet no. */
380

    
381
            av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
382
        }
383

    
384
skip:
385
        if (next_off && url_ftell(pb) != next_off &&
386
            url_fseek(pb, next_off, SEEK_SET) < 0)
387
            return -1;
388
    } while (next_off);
389

    
390
    return 0;
391
}
392

    
393
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
394
{
395
    RMDemuxContext *rm = s->priv_data;
396
    AVStream *st;
397

    
398
    rm->old_format = 1;
399
    st = av_new_stream(s, 0);
400
    if (!st)
401
        return -1;
402
    st->priv_data = ff_rm_alloc_rmstream();
403
    return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
404
}
405

    
406
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
407
{
408
    RMDemuxContext *rm = s->priv_data;
409
    AVStream *st;
410
    ByteIOContext *pb = s->pb;
411
    unsigned int tag;
412
    int tag_size;
413
    unsigned int start_time, duration;
414
    unsigned int data_off = 0, indx_off = 0;
415
    char buf[128];
416
    int flags = 0;
417

    
418
    tag = get_le32(pb);
419
    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
420
        /* very old .ra format */
421
        return rm_read_header_old(s, ap);
422
    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
423
        return AVERROR(EIO);
424
    }
425

    
426
    get_be32(pb); /* header size */
427
    get_be16(pb);
428
    get_be32(pb);
429
    get_be32(pb); /* number of headers */
430

    
431
    for(;;) {
432
        if (url_feof(pb))
433
            return -1;
434
        tag = get_le32(pb);
435
        tag_size = get_be32(pb);
436
        get_be16(pb);
437
#if 0
438
        printf("tag=%c%c%c%c (%08x) size=%d\n",
439
               (tag) & 0xff,
440
               (tag >> 8) & 0xff,
441
               (tag >> 16) & 0xff,
442
               (tag >> 24) & 0xff,
443
               tag,
444
               tag_size);
445
#endif
446
        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
447
            return -1;
448
        switch(tag) {
449
        case MKTAG('P', 'R', 'O', 'P'):
450
            /* file header */
451
            get_be32(pb); /* max bit rate */
452
            get_be32(pb); /* avg bit rate */
453
            get_be32(pb); /* max packet size */
454
            get_be32(pb); /* avg packet size */
455
            get_be32(pb); /* nb packets */
456
            get_be32(pb); /* duration */
457
            get_be32(pb); /* preroll */
458
            indx_off = get_be32(pb); /* index offset */
459
            data_off = get_be32(pb); /* data offset */
460
            get_be16(pb); /* nb streams */
461
            flags = get_be16(pb); /* flags */
462
            break;
463
        case MKTAG('C', 'O', 'N', 'T'):
464
            rm_read_metadata(s, 1);
465
            break;
466
        case MKTAG('M', 'D', 'P', 'R'):
467
            st = av_new_stream(s, 0);
468
            if (!st)
469
                return AVERROR(ENOMEM);
470
            st->id = get_be16(pb);
471
            get_be32(pb); /* max bit rate */
472
            st->codec->bit_rate = get_be32(pb); /* bit rate */
473
            get_be32(pb); /* max packet size */
474
            get_be32(pb); /* avg packet size */
475
            start_time = get_be32(pb); /* start time */
476
            get_be32(pb); /* preroll */
477
            duration = get_be32(pb); /* duration */
478
            st->start_time = start_time;
479
            st->duration = duration;
480
            get_str8(pb, buf, sizeof(buf)); /* desc */
481
            get_str8(pb, buf, sizeof(buf)); /* mimetype */
482
            st->codec->codec_type = AVMEDIA_TYPE_DATA;
483
            st->priv_data = ff_rm_alloc_rmstream();
484
            if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
485
                                          get_be32(pb)) < 0)
486
                return -1;
487
            break;
488
        case MKTAG('D', 'A', 'T', 'A'):
489
            goto header_end;
490
        default:
491
            /* unknown tag: skip it */
492
            url_fskip(pb, tag_size - 10);
493
            break;
494
        }
495
    }
496
 header_end:
497
    rm->nb_packets = get_be32(pb); /* number of packets */
498
    if (!rm->nb_packets && (flags & 4))
499
        rm->nb_packets = 3600 * 25;
500
    get_be32(pb); /* next data header */
501

    
502
    if (!data_off)
503
        data_off = url_ftell(pb) - 18;
504
    if (indx_off && url_fseek(pb, indx_off, SEEK_SET) >= 0) {
505
        rm_read_index(s);
506
        url_fseek(pb, data_off + 18, SEEK_SET);
507
    }
508

    
509
    return 0;
510
}
511

    
512
static int get_num(ByteIOContext *pb, int *len)
513
{
514
    int n, n1;
515

    
516
    n = get_be16(pb);
517
    (*len)-=2;
518
    n &= 0x7FFF;
519
    if (n >= 0x4000) {
520
        return n - 0x4000;
521
    } else {
522
        n1 = get_be16(pb);
523
        (*len)-=2;
524
        return (n << 16) | n1;
525
    }
526
}
527

    
528
/* multiple of 20 bytes for ra144 (ugly) */
529
#define RAW_PACKET_SIZE 1000
530

    
531
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
532
    RMDemuxContext *rm = s->priv_data;
533
    ByteIOContext *pb = s->pb;
534
    AVStream *st;
535
    uint32_t state=0xFFFFFFFF;
536

    
537
    while(!url_feof(pb)){
538
        int len, num, res, i;
539
        *pos= url_ftell(pb) - 3;
540
        if(rm->remaining_len > 0){
541
            num= rm->current_stream;
542
            len= rm->remaining_len;
543
            *timestamp = AV_NOPTS_VALUE;
544
            *flags= 0;
545
        }else{
546
            state= (state<<8) + get_byte(pb);
547

    
548
            if(state == MKBETAG('I', 'N', 'D', 'X')){
549
                int n_pkts, expected_len;
550
                len = get_be32(pb);
551
                url_fskip(pb, 2);
552
                n_pkts = get_be32(pb);
553
                expected_len = 20 + n_pkts * 14;
554
                if (len == 20)
555
                    /* some files don't add index entries to chunk size... */
556
                    len = expected_len;
557
                else if (len != expected_len)
558
                    av_log(s, AV_LOG_WARNING,
559
                           "Index size %d (%d pkts) is wrong, should be %d.\n",
560
                           len, n_pkts, expected_len);
561
                len -= 14; // we already read part of the index header
562
                if(len<0)
563
                    continue;
564
                goto skip;
565
            } else if (state == MKBETAG('D','A','T','A')) {
566
                av_log(s, AV_LOG_WARNING,
567
                       "DATA tag in middle of chunk, file may be broken.\n");
568
            }
569

    
570
            if(state > (unsigned)0xFFFF || state <= 12)
571
                continue;
572
            len=state - 12;
573
            state= 0xFFFFFFFF;
574

    
575
            num = get_be16(pb);
576
            *timestamp = get_be32(pb);
577
            res= get_byte(pb); /* reserved */
578
            *flags = get_byte(pb); /* flags */
579
        }
580
        for(i=0;i<s->nb_streams;i++) {
581
            st = s->streams[i];
582
            if (num == st->id)
583
                break;
584
        }
585
        if (i == s->nb_streams) {
586
skip:
587
            /* skip packet if unknown number */
588
            url_fskip(pb, len);
589
            rm->remaining_len = 0;
590
            continue;
591
        }
592
        *stream_index= i;
593

    
594
        return len;
595
    }
596
    return -1;
597
}
598

    
599
static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
600
                                   RMDemuxContext *rm, RMStream *vst,
601
                                   AVPacket *pkt, int len, int *pseq)
602
{
603
    int hdr, seq, pic_num, len2, pos;
604
    int type;
605

    
606
    hdr = get_byte(pb); len--;
607
    type = hdr >> 6;
608

    
609
    if(type != 3){  // not frame as a part of packet
610
        seq = get_byte(pb); len--;
611
    }
612
    if(type != 1){  // not whole frame
613
        len2 = get_num(pb, &len);
614
        pos  = get_num(pb, &len);
615
        pic_num = get_byte(pb); len--;
616
    }
617
    if(len<0)
618
        return -1;
619
    rm->remaining_len = len;
620
    if(type&1){     // frame, not slice
621
        if(type == 3)  // frame as a part of packet
622
            len= len2;
623
        if(rm->remaining_len < len)
624
            return -1;
625
        rm->remaining_len -= len;
626
        if(av_new_packet(pkt, len + 9) < 0)
627
            return AVERROR(EIO);
628
        pkt->data[0] = 0;
629
        AV_WL32(pkt->data + 1, 1);
630
        AV_WL32(pkt->data + 5, 0);
631
        get_buffer(pb, pkt->data + 9, len);
632
        return 0;
633
    }
634
    //now we have to deal with single slice
635

    
636
    *pseq = seq;
637
    if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
638
        vst->slices = ((hdr & 0x3F) << 1) + 1;
639
        vst->videobufsize = len2 + 8*vst->slices + 1;
640
        av_free_packet(&vst->pkt); //FIXME this should be output.
641
        if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
642
            return AVERROR(ENOMEM);
643
        vst->videobufpos = 8*vst->slices + 1;
644
        vst->cur_slice = 0;
645
        vst->curpic_num = pic_num;
646
        vst->pktpos = url_ftell(pb);
647
    }
648
    if(type == 2)
649
        len = FFMIN(len, pos);
650

    
651
    if(++vst->cur_slice > vst->slices)
652
        return 1;
653
    AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
654
    AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
655
    if(vst->videobufpos + len > vst->videobufsize)
656
        return 1;
657
    if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len)
658
        return AVERROR(EIO);
659
    vst->videobufpos += len;
660
    rm->remaining_len-= len;
661

    
662
    if(type == 2 || (vst->videobufpos) == vst->videobufsize){
663
        vst->pkt.data[0] = vst->cur_slice-1;
664
        *pkt= vst->pkt;
665
        vst->pkt.data= NULL;
666
        vst->pkt.size= 0;
667
        if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
668
            memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
669
                vst->videobufpos - 1 - 8*vst->slices);
670
        pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
671
        pkt->pts = AV_NOPTS_VALUE;
672
        pkt->pos = vst->pktpos;
673
        vst->slices = 0;
674
        return 0;
675
    }
676

    
677
    return 1;
678
}
679

    
680
static inline void
681
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
682
{
683
    uint8_t *ptr;
684
    int j;
685

    
686
    if (st->codec->codec_id == CODEC_ID_AC3) {
687
        ptr = pkt->data;
688
        for (j=0;j<pkt->size;j+=2) {
689
            FFSWAP(int, ptr[0], ptr[1]);
690
            ptr += 2;
691
        }
692
    }
693
}
694

    
695
/**
696
 * Perform 4-bit block reordering for SIPR data.
697
 * @todo This can be optimized, e.g. use memcpy() if data blocks are aligned
698
 */
699
void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
700
{
701
    int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket
702

    
703
    for (n = 0; n < 38; n++) {
704
        int j;
705
        int i = bs * sipr_swaps[n][0];
706
        int o = bs * sipr_swaps[n][1];
707

    
708
        /* swap 4bit-nibbles of block 'i' with 'o' */
709
        for (j = 0; j < bs; j++, i++, o++) {
710
            int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
711
                y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
712

    
713
            buf[o >> 1] = (x << (4 * (o & 1))) |
714
                (buf[o >> 1] & (0xF << (4 * !(o & 1))));
715
            buf[i >> 1] = (y << (4 * (i & 1))) |
716
                (buf[i >> 1] & (0xF << (4 * !(i & 1))));
717
        }
718
    }
719
}
720

    
721
int
722
ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
723
                    AVStream *st, RMStream *ast, int len, AVPacket *pkt,
724
                    int *seq, int flags, int64_t timestamp)
725
{
726
    RMDemuxContext *rm = s->priv_data;
727

    
728
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
729
        rm->current_stream= st->id;
730
        if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq))
731
            return -1; //got partial frame
732
    } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
733
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
734
            (st->codec->codec_id == CODEC_ID_COOK) ||
735
            (st->codec->codec_id == CODEC_ID_ATRAC3) ||
736
            (st->codec->codec_id == CODEC_ID_SIPR)) {
737
            int x;
738
            int sps = ast->sub_packet_size;
739
            int cfs = ast->coded_framesize;
740
            int h = ast->sub_packet_h;
741
            int y = ast->sub_packet_cnt;
742
            int w = ast->audio_framesize;
743

    
744
            if (flags & 2)
745
                y = ast->sub_packet_cnt = 0;
746
            if (!y)
747
                ast->audiotimestamp = timestamp;
748

    
749
            switch(st->codec->codec_id) {
750
                case CODEC_ID_RA_288:
751
                    for (x = 0; x < h/2; x++)
752
                        get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
753
                    break;
754
                case CODEC_ID_ATRAC3:
755
                case CODEC_ID_COOK:
756
                    for (x = 0; x < w/sps; x++)
757
                        get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
758
                    break;
759
                case CODEC_ID_SIPR:
760
                    get_buffer(pb, ast->pkt.data + y * w, w);
761
                    break;
762
            }
763

    
764
            if (++(ast->sub_packet_cnt) < h)
765
                return -1;
766
            if (st->codec->codec_id == CODEC_ID_SIPR)
767
                ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
768

    
769
             ast->sub_packet_cnt = 0;
770
             rm->audio_stream_num = st->index;
771
             rm->audio_pkt_cnt = h * w / st->codec->block_align;
772
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
773
            int x;
774
            rm->audio_stream_num = st->index;
775
            ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
776
            if (ast->sub_packet_cnt) {
777
                for (x = 0; x < ast->sub_packet_cnt; x++)
778
                    ast->sub_packet_lengths[x] = get_be16(pb);
779
                rm->audio_pkt_cnt = ast->sub_packet_cnt;
780
                ast->audiotimestamp = timestamp;
781
            } else
782
                return -1;
783
        } else {
784
            av_get_packet(pb, pkt, len);
785
            rm_ac3_swap_bytes(st, pkt);
786
        }
787
    } else
788
        av_get_packet(pb, pkt, len);
789

    
790
    pkt->stream_index = st->index;
791

    
792
#if 0
793
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
794
        if(st->codec->codec_id == CODEC_ID_RV20){
795
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
796
            av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
797

798
            seq |= (timestamp&~0x3FFF);
799
            if(seq - timestamp >  0x2000) seq -= 0x4000;
800
            if(seq - timestamp < -0x2000) seq += 0x4000;
801
        }
802
    }
803
#endif
804

    
805
    pkt->pts= timestamp;
806
    if (flags & 2)
807
        pkt->flags |= PKT_FLAG_KEY;
808

    
809
    return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
810
}
811

    
812
int
813
ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
814
                      AVStream *st, RMStream *ast, AVPacket *pkt)
815
{
816
    RMDemuxContext *rm = s->priv_data;
817

    
818
    assert (rm->audio_pkt_cnt > 0);
819

    
820
    if (st->codec->codec_id == CODEC_ID_AAC)
821
        av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
822
    else {
823
        av_new_packet(pkt, st->codec->block_align);
824
        memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
825
               (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
826
               st->codec->block_align);
827
    }
828
    rm->audio_pkt_cnt--;
829
    if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
830
        ast->audiotimestamp = AV_NOPTS_VALUE;
831
        pkt->flags = PKT_FLAG_KEY;
832
    } else
833
        pkt->flags = 0;
834
    pkt->stream_index = st->index;
835

    
836
    return rm->audio_pkt_cnt;
837
}
838

    
839
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
840
{
841
    RMDemuxContext *rm = s->priv_data;
842
    AVStream *st;
843
    int i, len, res, seq = 1;
844
    int64_t timestamp, pos;
845
    int flags;
846

    
847
    for (;;) {
848
        if (rm->audio_pkt_cnt) {
849
            // If there are queued audio packet return them first
850
            st = s->streams[rm->audio_stream_num];
851
            ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
852
        } else {
853
            if (rm->old_format) {
854
                RMStream *ast;
855

    
856
                st = s->streams[0];
857
                ast = st->priv_data;
858
                timestamp = AV_NOPTS_VALUE;
859
                len = !ast->audio_framesize ? RAW_PACKET_SIZE :
860
                    ast->coded_framesize * ast->sub_packet_h / 2;
861
                flags = (seq++ == 1) ? 2 : 0;
862
            } else {
863
                len=sync(s, &timestamp, &flags, &i, &pos);
864
                if (len > 0)
865
                    st = s->streams[i];
866
            }
867

    
868
            if(len<0 || url_feof(s->pb))
869
                return AVERROR(EIO);
870

    
871
            res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
872
                                      &seq, flags, timestamp);
873
            if((flags&2) && (seq&0x7F) == 1)
874
                av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
875
            if (res)
876
                continue;
877
        }
878

    
879
        if(  (st->discard >= AVDISCARD_NONKEY && !(flags&2))
880
           || st->discard >= AVDISCARD_ALL){
881
            av_free_packet(pkt);
882
        } else
883
            break;
884
    }
885

    
886
    return 0;
887
}
888

    
889
static int rm_read_close(AVFormatContext *s)
890
{
891
    int i;
892

    
893
    for (i=0;i<s->nb_streams;i++)
894
        ff_rm_free_rmstream(s->streams[i]->priv_data);
895

    
896
    return 0;
897
}
898

    
899
static int rm_probe(AVProbeData *p)
900
{
901
    /* check file header */
902
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
903
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
904
         p->buf[4] == 0 && p->buf[5] == 0) ||
905
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
906
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
907
        return AVPROBE_SCORE_MAX;
908
    else
909
        return 0;
910
}
911

    
912
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
913
                               int64_t *ppos, int64_t pos_limit)
914
{
915
    RMDemuxContext *rm = s->priv_data;
916
    int64_t pos, dts;
917
    int stream_index2, flags, len, h;
918

    
919
    pos = *ppos;
920

    
921
    if(rm->old_format)
922
        return AV_NOPTS_VALUE;
923

    
924
    url_fseek(s->pb, pos, SEEK_SET);
925
    rm->remaining_len=0;
926
    for(;;){
927
        int seq=1;
928
        AVStream *st;
929

    
930
        len=sync(s, &dts, &flags, &stream_index2, &pos);
931
        if(len<0)
932
            return AV_NOPTS_VALUE;
933

    
934
        st = s->streams[stream_index2];
935
        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
936
            h= get_byte(s->pb); len--;
937
            if(!(h & 0x40)){
938
                seq = get_byte(s->pb); len--;
939
            }
940
        }
941

    
942
        if((flags&2) && (seq&0x7F) == 1){
943
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
944
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
945
            if(stream_index2 == stream_index)
946
                break;
947
        }
948

    
949
        url_fskip(s->pb, len);
950
    }
951
    *ppos = pos;
952
    return dts;
953
}
954

    
955
AVInputFormat rm_demuxer = {
956
    "rm",
957
    NULL_IF_CONFIG_SMALL("RealMedia format"),
958
    sizeof(RMDemuxContext),
959
    rm_probe,
960
    rm_read_header,
961
    rm_read_packet,
962
    rm_read_close,
963
    NULL,
964
    rm_read_dts,
965
};
966

    
967
AVInputFormat rdt_demuxer = {
968
    "rdt",
969
    NULL_IF_CONFIG_SMALL("RDT demuxer"),
970
    sizeof(RMDemuxContext),
971
    NULL,
972
    NULL,
973
    NULL,
974
    rm_read_close,
975
};