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ffmpeg / libavformat / rmdec.c @ 21b37529

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1
/*
2
 * "Real" compatible demuxer.
3
 * Copyright (c) 2000, 2001 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
#include "libavutil/avstring.h"
23
#include "libavutil/intreadwrite.h"
24
#include "avformat.h"
25
#include "rm.h"
26

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

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

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

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

    
65
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
66
{
67
    get_strl(pb, buf, buf_size, get_byte(pb));
68
}
69

    
70
static void rm_read_metadata(AVFormatContext *s, int wide)
71
{
72
    char buf[1024];
73
    int i;
74
    for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
75
        int len = wide ? get_be16(s->pb) : get_byte(s->pb);
76
        get_strl(s->pb, buf, sizeof(buf), len);
77
        av_metadata_set(&s->metadata, ff_rm_metadata[i], buf);
78
    }
79
}
80

    
81
RMStream *ff_rm_alloc_rmstream (void)
82
{
83
    RMStream *rms = av_mallocz(sizeof(RMStream));
84
    rms->curpic_num = -1;
85
    return rms;
86
}
87

    
88
void ff_rm_free_rmstream (RMStream *rms)
89
{
90
    av_free_packet(&rms->pkt);
91
}
92

    
93
static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
94
                                     AVStream *st, RMStream *ast, int read_all)
95
{
96
    char buf[256];
97
    uint32_t version;
98

    
99
    /* ra type header */
100
    version = get_be32(pb); /* version */
101
    if (((version >> 16) & 0xff) == 3) {
102
        int64_t startpos = url_ftell(pb);
103
        url_fskip(pb, 14);
104
        rm_read_metadata(s, 0);
105
        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
106
            // fourcc (should always be "lpcJ")
107
            get_byte(pb);
108
            get_str8(pb, buf, sizeof(buf));
109
        }
110
        // Skip extra header crap (this should never happen)
111
        if ((startpos + (version & 0xffff)) > url_ftell(pb))
112
            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
113
        st->codec->sample_rate = 8000;
114
        st->codec->channels = 1;
115
        st->codec->codec_type = CODEC_TYPE_AUDIO;
116
        st->codec->codec_id = CODEC_ID_RA_144;
117
    } else {
118
        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
119
        /* old version (4) */
120
        get_be32(pb); /* .ra4 */
121
        get_be32(pb); /* data size */
122
        get_be16(pb); /* version2 */
123
        get_be32(pb); /* header size */
124
        flavor= get_be16(pb); /* add codec info / flavor */
125
        ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
126
        get_be32(pb); /* ??? */
127
        get_be32(pb); /* ??? */
128
        get_be32(pb); /* ??? */
129
        ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
130
        st->codec->block_align= get_be16(pb); /* frame size */
131
        ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
132
        get_be16(pb); /* ??? */
133
        if (((version >> 16) & 0xff) == 5) {
134
            get_be16(pb); get_be16(pb); get_be16(pb);
135
        }
136
        st->codec->sample_rate = get_be16(pb);
137
        get_be32(pb);
138
        st->codec->channels = get_be16(pb);
139
        if (((version >> 16) & 0xff) == 5) {
140
            get_be32(pb);
141
            get_buffer(pb, buf, 4);
142
            buf[4] = 0;
143
        } else {
144
            get_str8(pb, buf, sizeof(buf)); /* desc */
145
            get_str8(pb, buf, sizeof(buf)); /* desc */
146
        }
147
        st->codec->codec_type = CODEC_TYPE_AUDIO;
148
        if (!strcmp(buf, "dnet")) {
149
            st->codec->codec_id = CODEC_ID_AC3;
150
            st->need_parsing = AVSTREAM_PARSE_FULL;
151
        } else if (!strcmp(buf, "28_8")) {
152
            st->codec->codec_id = CODEC_ID_RA_288;
153
            st->codec->extradata_size= 0;
154
            ast->audio_framesize = st->codec->block_align;
155
            st->codec->block_align = coded_framesize;
156

    
157
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
158
                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
159
                return -1;
160
            }
161

    
162
            av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
163
        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
164
            int codecdata_length;
165
            get_be16(pb); get_byte(pb);
166
            if (((version >> 16) & 0xff) == 5)
167
                get_byte(pb);
168
            codecdata_length = get_be32(pb);
169
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
170
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
171
                return -1;
172
            }
173

    
174
            if(sub_packet_size <= 0){
175
                av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
176
                return -1;
177
            }
178

    
179
            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
180
            else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
181
            else st->codec->codec_id = CODEC_ID_ATRAC3;
182
            st->codec->extradata_size= codecdata_length;
183
            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
184
            get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
185
            ast->audio_framesize = st->codec->block_align;
186
            st->codec->block_align = ast->sub_packet_size;
187

    
188
            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
189
                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
190
                return -1;
191
            }
192

    
193
            av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
194
        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
195
            int codecdata_length;
196
            get_be16(pb); get_byte(pb);
197
            if (((version >> 16) & 0xff) == 5)
198
                get_byte(pb);
199
            st->codec->codec_id = CODEC_ID_AAC;
200
            codecdata_length = get_be32(pb);
201
            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
202
                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
203
                return -1;
204
            }
205
            if (codecdata_length >= 1) {
206
                st->codec->extradata_size = codecdata_length - 1;
207
                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
208
                get_byte(pb);
209
                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
210
            }
211
        } else {
212
            st->codec->codec_id = CODEC_ID_NONE;
213
            av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
214
        }
215
        if (read_all) {
216
            get_byte(pb);
217
            get_byte(pb);
218
            get_byte(pb);
219
            rm_read_metadata(s, 0);
220
        }
221
    }
222
    return 0;
223
}
224

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

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

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

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

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

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

    
292
    return 0;
293
}
294

    
295

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

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

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

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

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

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

    
406
static int get_num(ByteIOContext *pb, int *len)
407
{
408
    int n, n1;
409

    
410
    n = get_be16(pb);
411
    (*len)-=2;
412
    n &= 0x7FFF;
413
    if (n >= 0x4000) {
414
        return n - 0x4000;
415
    } else {
416
        n1 = get_be16(pb);
417
        (*len)-=2;
418
        return (n << 16) | n1;
419
    }
420
}
421

    
422
/* multiple of 20 bytes for ra144 (ugly) */
423
#define RAW_PACKET_SIZE 1000
424

    
425
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
426
    RMDemuxContext *rm = s->priv_data;
427
    ByteIOContext *pb = s->pb;
428
    int len, num, res, i;
429
    AVStream *st;
430
    uint32_t state=0xFFFFFFFF;
431

    
432
    while(!url_feof(pb)){
433
        *pos= url_ftell(pb) - 3;
434
        if(rm->remaining_len > 0){
435
            num= rm->current_stream;
436
            len= rm->remaining_len;
437
            *timestamp = AV_NOPTS_VALUE;
438
            *flags= 0;
439
        }else{
440
            state= (state<<8) + get_byte(pb);
441

    
442
            if(state == MKBETAG('I', 'N', 'D', 'X')){
443
                len = get_be16(pb) - 6;
444
                if(len<0)
445
                    continue;
446
                goto skip;
447
            }
448

    
449
            if(state > (unsigned)0xFFFF || state < 12)
450
                continue;
451
            len=state;
452
            state= 0xFFFFFFFF;
453

    
454
            num = get_be16(pb);
455
            *timestamp = get_be32(pb);
456
            res= get_byte(pb); /* reserved */
457
            *flags = get_byte(pb); /* flags */
458

    
459

    
460
            len -= 12;
461
        }
462
        for(i=0;i<s->nb_streams;i++) {
463
            st = s->streams[i];
464
            if (num == st->id)
465
                break;
466
        }
467
        if (i == s->nb_streams) {
468
skip:
469
            /* skip packet if unknown number */
470
            url_fskip(pb, len);
471
            rm->remaining_len -= len;
472
            continue;
473
        }
474
        *stream_index= i;
475

    
476
        return len;
477
    }
478
    return -1;
479
}
480

    
481
static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
482
                                   RMDemuxContext *rm, RMStream *vst,
483
                                   AVPacket *pkt, int len)
484
{
485
    int hdr, seq, pic_num, len2, pos;
486
    int type;
487

    
488
    hdr = get_byte(pb); len--;
489
    type = hdr >> 6;
490

    
491
    if(type != 3){  // not frame as a part of packet
492
        seq = get_byte(pb); len--;
493
    }
494
    if(type != 1){  // not whole frame
495
        len2 = get_num(pb, &len);
496
        pos  = get_num(pb, &len);
497
        pic_num = get_byte(pb); len--;
498
    }
499
    if(len<0)
500
        return -1;
501
    rm->remaining_len = len;
502
    if(type&1){     // frame, not slice
503
        if(type == 3)  // frame as a part of packet
504
            len= len2;
505
        if(rm->remaining_len < len)
506
            return -1;
507
        rm->remaining_len -= len;
508
        if(av_new_packet(pkt, len + 9) < 0)
509
            return AVERROR(EIO);
510
        pkt->data[0] = 0;
511
        AV_WL32(pkt->data + 1, 1);
512
        AV_WL32(pkt->data + 5, 0);
513
        get_buffer(pb, pkt->data + 9, len);
514
        return 0;
515
    }
516
    //now we have to deal with single slice
517

    
518
    if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
519
        vst->slices = ((hdr & 0x3F) << 1) + 1;
520
        vst->videobufsize = len2 + 8*vst->slices + 1;
521
        av_free_packet(&vst->pkt); //FIXME this should be output.
522
        if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
523
            return AVERROR(ENOMEM);
524
        vst->videobufpos = 8*vst->slices + 1;
525
        vst->cur_slice = 0;
526
        vst->curpic_num = pic_num;
527
        vst->pktpos = url_ftell(pb);
528
    }
529
    if(type == 2)
530
        len = FFMIN(len, pos);
531

    
532
    if(++vst->cur_slice > vst->slices)
533
        return 1;
534
    AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
535
    AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
536
    if(vst->videobufpos + len > vst->videobufsize)
537
        return 1;
538
    if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len)
539
        return AVERROR(EIO);
540
    vst->videobufpos += len;
541
    rm->remaining_len-= len;
542

    
543
    if(type == 2 || (vst->videobufpos) == vst->videobufsize){
544
        vst->pkt.data[0] = vst->cur_slice-1;
545
        *pkt= vst->pkt;
546
        vst->pkt.data= NULL;
547
        vst->pkt.size= 0;
548
        if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
549
            memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
550
                vst->videobufpos - 1 - 8*vst->slices);
551
        pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
552
        pkt->pts = AV_NOPTS_VALUE;
553
        pkt->pos = vst->pktpos;
554
        return 0;
555
    }
556

    
557
    return 1;
558
}
559

    
560
static inline void
561
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
562
{
563
    uint8_t *ptr;
564
    int j;
565

    
566
    if (st->codec->codec_id == CODEC_ID_AC3) {
567
        ptr = pkt->data;
568
        for (j=0;j<pkt->size;j+=2) {
569
            FFSWAP(int, ptr[0], ptr[1]);
570
            ptr += 2;
571
        }
572
    }
573
}
574

    
575
int
576
ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
577
                    AVStream *st, RMStream *ast, int len, AVPacket *pkt,
578
                    int *seq, int *flags, int64_t *timestamp)
579
{
580
    RMDemuxContext *rm = s->priv_data;
581

    
582
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
583
        rm->current_stream= st->id;
584
        if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))
585
            return -1; //got partial frame
586
    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
587
        if ((st->codec->codec_id == CODEC_ID_RA_288) ||
588
            (st->codec->codec_id == CODEC_ID_COOK) ||
589
            (st->codec->codec_id == CODEC_ID_ATRAC3) ||
590
            (st->codec->codec_id == CODEC_ID_SIPR)) {
591
            int x;
592
            int sps = ast->sub_packet_size;
593
            int cfs = ast->coded_framesize;
594
            int h = ast->sub_packet_h;
595
            int y = ast->sub_packet_cnt;
596
            int w = ast->audio_framesize;
597

    
598
            if (*flags & 2)
599
                y = ast->sub_packet_cnt = 0;
600
            if (!y)
601
                ast->audiotimestamp = *timestamp;
602

    
603
            switch(st->codec->codec_id) {
604
                case CODEC_ID_RA_288:
605
                    for (x = 0; x < h/2; x++)
606
                        get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
607
                    break;
608
                case CODEC_ID_ATRAC3:
609
                case CODEC_ID_COOK:
610
                    for (x = 0; x < w/sps; x++)
611
                        get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
612
                    break;
613
            }
614

    
615
            if (++(ast->sub_packet_cnt) < h)
616
                return -1;
617
            else {
618
                ast->sub_packet_cnt = 0;
619
                rm->audio_stream_num = st->index;
620
                rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
621
                // Release first audio packet
622
                av_new_packet(pkt, st->codec->block_align);
623
                memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
624
                *timestamp = ast->audiotimestamp;
625
                *flags = 2; // Mark first packet as keyframe
626
            }
627
        } else if (st->codec->codec_id == CODEC_ID_AAC) {
628
            int x;
629
            rm->audio_stream_num = st->index;
630
            ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
631
            if (ast->sub_packet_cnt) {
632
                for (x = 0; x < ast->sub_packet_cnt; x++)
633
                    ast->sub_packet_lengths[x] = get_be16(pb);
634
                // Release first audio packet
635
                rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
636
                av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
637
                *flags = 2; // Mark first packet as keyframe
638
            }
639
        } else {
640
            av_get_packet(pb, pkt, len);
641
            rm_ac3_swap_bytes(st, pkt);
642
        }
643
    } else
644
        av_get_packet(pb, pkt, len);
645

    
646
    pkt->stream_index = st->index;
647

    
648
#if 0
649
    if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
650
        if(st->codec->codec_id == CODEC_ID_RV20){
651
            int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
652
            av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
653

654
            seq |= (*timestamp&~0x3FFF);
655
            if(seq - *timestamp >  0x2000) seq -= 0x4000;
656
            if(seq - *timestamp < -0x2000) seq += 0x4000;
657
        }
658
    }
659
#endif
660

    
661
    pkt->pts= *timestamp;
662
    if (*flags & 2)
663
        pkt->flags |= PKT_FLAG_KEY;
664

    
665
    return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
666
}
667

    
668
int
669
ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
670
                      AVStream *st, RMStream *ast, AVPacket *pkt)
671
{
672
    RMDemuxContext *rm = s->priv_data;
673

    
674
    assert (rm->audio_pkt_cnt > 0);
675

    
676
    if (st->codec->codec_id == CODEC_ID_AAC)
677
        av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
678
    else {
679
        av_new_packet(pkt, st->codec->block_align);
680
        memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
681
               (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
682
               st->codec->block_align);
683
    }
684
    rm->audio_pkt_cnt--;
685
    pkt->flags = 0;
686
    pkt->stream_index = st->index;
687

    
688
    return rm->audio_pkt_cnt;
689
}
690

    
691
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
692
{
693
    RMDemuxContext *rm = s->priv_data;
694
    AVStream *st;
695
    int i, len, seq = 1;
696
    int64_t timestamp, pos;
697
    int flags;
698

    
699
    if (rm->audio_pkt_cnt) {
700
        // If there are queued audio packet return them first
701
        st = s->streams[rm->audio_stream_num];
702
        ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
703
    } else if (rm->old_format) {
704
        RMStream *ast = s->streams[0]->priv_data;
705
        int res, y, h = ast->audio_framesize ? ast->sub_packet_h : 1;
706

    
707
        timestamp = AV_NOPTS_VALUE;
708
        len = ast->audio_framesize ? ast->coded_framesize * h / 2 : RAW_PACKET_SIZE;
709
        for (y = 0; y < h; y++) {
710
            flags = !y ? 2 : 0;
711
            res = ff_rm_parse_packet(s, s->pb, s->streams[0], ast, len, pkt,
712
                                     &seq, &flags, &timestamp);
713
        }
714
        if (res < 0)
715
            return res;
716
    } else {
717
resync:
718
        len=sync(s, &timestamp, &flags, &i, &pos);
719
        if(len<0)
720
            return AVERROR(EIO);
721
        st = s->streams[i];
722

    
723
        if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
724
                                &seq, &flags, &timestamp) < 0)
725
            goto resync;
726

    
727
        if(  (st->discard >= AVDISCARD_NONKEY && !(flags&2))
728
           || st->discard >= AVDISCARD_ALL){
729
            av_free_packet(pkt);
730
            while (rm->audio_pkt_cnt > 0) {
731
                ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
732
                av_free_packet(pkt);
733
            }
734
            goto resync;
735
        }
736

    
737
        if((flags&2) && (seq&0x7F) == 1)
738
            av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
739
    }
740

    
741
    return 0;
742
}
743

    
744
static int rm_read_close(AVFormatContext *s)
745
{
746
    int i;
747

    
748
    for (i=0;i<s->nb_streams;i++)
749
        ff_rm_free_rmstream(s->streams[i]->priv_data);
750

    
751
    return 0;
752
}
753

    
754
static int rm_probe(AVProbeData *p)
755
{
756
    /* check file header */
757
    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
758
         p->buf[2] == 'M' && p->buf[3] == 'F' &&
759
         p->buf[4] == 0 && p->buf[5] == 0) ||
760
        (p->buf[0] == '.' && p->buf[1] == 'r' &&
761
         p->buf[2] == 'a' && p->buf[3] == 0xfd))
762
        return AVPROBE_SCORE_MAX;
763
    else
764
        return 0;
765
}
766

    
767
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
768
                               int64_t *ppos, int64_t pos_limit)
769
{
770
    RMDemuxContext *rm = s->priv_data;
771
    int64_t pos, dts;
772
    int stream_index2, flags, len, h;
773

    
774
    pos = *ppos;
775

    
776
    if(rm->old_format)
777
        return AV_NOPTS_VALUE;
778

    
779
    url_fseek(s->pb, pos, SEEK_SET);
780
    rm->remaining_len=0;
781
    for(;;){
782
        int seq=1;
783
        AVStream *st;
784

    
785
        len=sync(s, &dts, &flags, &stream_index2, &pos);
786
        if(len<0)
787
            return AV_NOPTS_VALUE;
788

    
789
        st = s->streams[stream_index2];
790
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
791
            h= get_byte(s->pb); len--;
792
            if(!(h & 0x40)){
793
                seq = get_byte(s->pb); len--;
794
            }
795
        }
796

    
797
        if((flags&2) && (seq&0x7F) == 1){
798
//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
799
            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
800
            if(stream_index2 == stream_index)
801
                break;
802
        }
803

    
804
        url_fskip(s->pb, len);
805
    }
806
    *ppos = pos;
807
    return dts;
808
}
809

    
810
AVInputFormat rm_demuxer = {
811
    "rm",
812
    NULL_IF_CONFIG_SMALL("RealMedia format"),
813
    sizeof(RMDemuxContext),
814
    rm_probe,
815
    rm_read_header,
816
    rm_read_packet,
817
    rm_read_close,
818
    NULL,
819
    rm_read_dts,
820
};
821

    
822
AVInputFormat rdt_demuxer = {
823
    "rdt",
824
    NULL_IF_CONFIG_SMALL("RDT demuxer"),
825
    sizeof(RMDemuxContext),
826
    NULL,
827
    NULL,
828
    NULL,
829
    rm_read_close,
830
};