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ffmpeg / libavformat / asf.c @ 1ae7518d

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1
/*
2
 * ASF 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
#include "avformat.h"
22
#include "riff.h"
23
#include "mpegaudio.h"
24
#include "asf.h"
25
#include "common.h"
26

    
27
#undef NDEBUG
28
#include <assert.h>
29

    
30
#define FRAME_HEADER_SIZE 17
31
// Fix Me! FRAME_HEADER_SIZE may be different.
32

    
33
static const GUID index_guid = {
34
    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
35
};
36

    
37
/**********************************/
38
/* decoding */
39

    
40
//#define DEBUG
41

    
42
#ifdef DEBUG
43
#define PRINT_IF_GUID(g,cmp) \
44
if (!memcmp(g, &cmp, sizeof(GUID))) \
45
    printf("(GUID: %s) ", #cmp)
46

    
47
static void print_guid(const GUID *g)
48
{
49
    int i;
50
    PRINT_IF_GUID(g, asf_header);
51
    else PRINT_IF_GUID(g, file_header);
52
    else PRINT_IF_GUID(g, stream_header);
53
    else PRINT_IF_GUID(g, audio_stream);
54
    else PRINT_IF_GUID(g, audio_conceal_none);
55
    else PRINT_IF_GUID(g, video_stream);
56
    else PRINT_IF_GUID(g, video_conceal_none);
57
    else PRINT_IF_GUID(g, command_stream);
58
    else PRINT_IF_GUID(g, comment_header);
59
    else PRINT_IF_GUID(g, codec_comment_header);
60
    else PRINT_IF_GUID(g, codec_comment1_header);
61
    else PRINT_IF_GUID(g, data_header);
62
    else PRINT_IF_GUID(g, index_guid);
63
    else PRINT_IF_GUID(g, head1_guid);
64
    else PRINT_IF_GUID(g, head2_guid);
65
    else PRINT_IF_GUID(g, my_guid);
66
    else PRINT_IF_GUID(g, ext_stream_header);
67
    else PRINT_IF_GUID(g, extended_content_header);
68
    else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
69
    else PRINT_IF_GUID(g, ext_stream_audio_stream);
70
    else
71
        printf("(GUID: unknown) ");
72
    for(i=0;i<16;i++)
73
        printf(" 0x%02x,", (*g)[i]);
74
    printf("}\n");
75
}
76
#undef PRINT_IF_GUID
77
#endif
78

    
79
static void get_guid(ByteIOContext *s, GUID *g)
80
{
81
    assert(sizeof(*g) == 16);
82
    get_buffer(s, g, sizeof(*g));
83
}
84

    
85
#if 0
86
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
87
{
88
    int len, c;
89
    char *q;
90

91
    len = get_le16(pb);
92
    q = buf;
93
    while (len > 0) {
94
        c = get_le16(pb);
95
        if ((q - buf) < buf_size - 1)
96
            *q++ = c;
97
        len--;
98
    }
99
    *q = '\0';
100
}
101
#endif
102

    
103
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
104
{
105
    char* q = buf;
106
    len /= 2;
107
    while (len--) {
108
        uint8_t tmp;
109
        PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
110
    }
111
    *q = '\0';
112
}
113

    
114
static int asf_probe(AVProbeData *pd)
115
{
116
    /* check file header */
117
    if (pd->buf_size <= 32)
118
        return 0;
119

    
120
    if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
121
        return AVPROBE_SCORE_MAX;
122
    else
123
        return 0;
124
}
125

    
126
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
127
{
128
    ASFContext *asf = s->priv_data;
129
    GUID g;
130
    ByteIOContext *pb = &s->pb;
131
    AVStream *st;
132
    ASFStream *asf_st;
133
    int size, i;
134
    int64_t gsize;
135

    
136
    get_guid(pb, &g);
137
    if (memcmp(&g, &asf_header, sizeof(GUID)))
138
        goto fail;
139
    get_le64(pb);
140
    get_le32(pb);
141
    get_byte(pb);
142
    get_byte(pb);
143
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
144
    for(;;) {
145
        get_guid(pb, &g);
146
        gsize = get_le64(pb);
147
#ifdef DEBUG
148
        printf("%08"PRIx64": ", url_ftell(pb) - 24);
149
        print_guid(&g);
150
        printf("  size=0x%"PRIx64"\n", gsize);
151
#endif
152
        if (gsize < 24)
153
            goto fail;
154
        if (!memcmp(&g, &file_header, sizeof(GUID))) {
155
            get_guid(pb, &asf->hdr.guid);
156
            asf->hdr.file_size          = get_le64(pb);
157
            asf->hdr.create_time        = get_le64(pb);
158
            asf->nb_packets             = get_le64(pb);
159
            asf->hdr.send_time          = get_le64(pb);
160
            asf->hdr.play_time          = get_le64(pb);
161
            asf->hdr.preroll            = get_le32(pb);
162
            asf->hdr.ignore             = get_le32(pb);
163
            asf->hdr.flags              = get_le32(pb);
164
            asf->hdr.min_pktsize        = get_le32(pb);
165
            asf->hdr.max_pktsize        = get_le32(pb);
166
            asf->hdr.max_bitrate        = get_le32(pb);
167
            asf->packet_size = asf->hdr.max_pktsize;
168
        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
169
            int type, type_specific_size, sizeX;
170
            uint64_t total_size;
171
            unsigned int tag1;
172
            int64_t pos1, pos2;
173
            int test_for_ext_stream_audio;
174

    
175
            pos1 = url_ftell(pb);
176

    
177
            st = av_new_stream(s, 0);
178
            if (!st)
179
                goto fail;
180
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
181
            asf_st = av_mallocz(sizeof(ASFStream));
182
            if (!asf_st)
183
                goto fail;
184
            st->priv_data = asf_st;
185
            st->start_time = asf->hdr.preroll;
186
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
187
                st->duration = asf->hdr.send_time /
188
                    (10000000 / 1000) - st->start_time;
189
            }
190
            get_guid(pb, &g);
191

    
192
            test_for_ext_stream_audio = 0;
193
            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
194
                type = CODEC_TYPE_AUDIO;
195
            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
196
                type = CODEC_TYPE_VIDEO;
197
            } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
198
                type = CODEC_TYPE_UNKNOWN;
199
            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
200
                test_for_ext_stream_audio = 1;
201
                type = CODEC_TYPE_UNKNOWN;
202
            } else {
203
                goto fail;
204
            }
205
            get_guid(pb, &g);
206
            total_size = get_le64(pb);
207
            type_specific_size = get_le32(pb);
208
            get_le32(pb);
209
            st->id = get_le16(pb) & 0x7f; /* stream id */
210
            // mapping of asf ID to AV stream ID;
211
            asf->asfid2avid[st->id] = s->nb_streams - 1;
212

    
213
            get_le32(pb);
214

    
215
            if (test_for_ext_stream_audio) {
216
                get_guid(pb, &g);
217
                if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
218
                    type = CODEC_TYPE_AUDIO;
219
                    get_guid(pb, &g);
220
                    get_le32(pb);
221
                    get_le32(pb);
222
                    get_le32(pb);
223
                    get_guid(pb, &g);
224
                    get_le32(pb);
225
                }
226
            }
227

    
228
            st->codec->codec_type = type;
229
            if (type == CODEC_TYPE_AUDIO) {
230
                get_wav_header(pb, st->codec, type_specific_size);
231
                st->need_parsing = 1;
232
                /* We have to init the frame size at some point .... */
233
                pos2 = url_ftell(pb);
234
                if (gsize > (pos2 + 8 - pos1 + 24)) {
235
                    asf_st->ds_span = get_byte(pb);
236
                    asf_st->ds_packet_size = get_le16(pb);
237
                    asf_st->ds_chunk_size = get_le16(pb);
238
                    get_le16(pb); //ds_data_size
239
                    get_byte(pb); //ds_silence_data
240
                }
241
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
242
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
243
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
244
                if (asf_st->ds_span > 1) {
245
                    if (!asf_st->ds_chunk_size
246
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
247
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
248
                        asf_st->ds_span = 0; // disable descrambling
249
                }
250
                switch (st->codec->codec_id) {
251
                case CODEC_ID_MP3:
252
                    st->codec->frame_size = MPA_FRAME_SIZE;
253
                    break;
254
                case CODEC_ID_PCM_S16LE:
255
                case CODEC_ID_PCM_S16BE:
256
                case CODEC_ID_PCM_U16LE:
257
                case CODEC_ID_PCM_U16BE:
258
                case CODEC_ID_PCM_S8:
259
                case CODEC_ID_PCM_U8:
260
                case CODEC_ID_PCM_ALAW:
261
                case CODEC_ID_PCM_MULAW:
262
                    st->codec->frame_size = 1;
263
                    break;
264
                default:
265
                    /* This is probably wrong, but it prevents a crash later */
266
                    st->codec->frame_size = 1;
267
                    break;
268
                }
269
            } else if (type == CODEC_TYPE_VIDEO) {
270
                get_le32(pb);
271
                get_le32(pb);
272
                get_byte(pb);
273
                size = get_le16(pb); /* size */
274
                sizeX= get_le32(pb); /* size */
275
                st->codec->width = get_le32(pb);
276
                st->codec->height = get_le32(pb);
277
                /* not available for asf */
278
                get_le16(pb); /* panes */
279
                st->codec->bits_per_sample = get_le16(pb); /* depth */
280
                tag1 = get_le32(pb);
281
                url_fskip(pb, 20);
282
//                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
283
                size= sizeX;
284
                if (size > 40) {
285
                    st->codec->extradata_size = size - 40;
286
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
287
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
288
                }
289

    
290
        /* Extract palette from extradata if bpp <= 8 */
291
        /* This code assumes that extradata contains only palette */
292
        /* This is true for all paletted codecs implemented in ffmpeg */
293
        if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
294
            st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
295
#ifdef WORDS_BIGENDIAN
296
            for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
297
                st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
298
#else
299
            memcpy(st->codec->palctrl->palette, st->codec->extradata,
300
                   FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
301
#endif
302
            st->codec->palctrl->palette_changed = 1;
303
        }
304

    
305
                st->codec->codec_tag = tag1;
306
                st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
307
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
308
                    st->need_parsing = 1;
309
            }
310
            pos2 = url_ftell(pb);
311
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
312
        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
313
            asf->data_object_offset = url_ftell(pb);
314
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
315
            if (!(asf->hdr.flags & 0x01) && gsize != (uint64_t)-1 && gsize >= 24) {
316
                asf->data_object_size = gsize - 24;
317
            } else {
318
                asf->data_object_size = (uint64_t)-1;
319
            }
320
            break;
321
        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
322
            int len1, len2, len3, len4, len5;
323

    
324
            len1 = get_le16(pb);
325
            len2 = get_le16(pb);
326
            len3 = get_le16(pb);
327
            len4 = get_le16(pb);
328
            len5 = get_le16(pb);
329
            get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
330
            get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
331
            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
332
            get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
333
            url_fskip(pb, len5);
334
       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
335
                int desc_count, i;
336

    
337
                desc_count = get_le16(pb);
338
                for(i=0;i<desc_count;i++)
339
                {
340
                        int name_len,value_type,value_len;
341
                        uint64_t value_num = 0;
342
                        char name[1024];
343

    
344
                        name_len = get_le16(pb);
345
                        get_str16_nolen(pb, name_len, name, sizeof(name));
346
                        value_type = get_le16(pb);
347
                        value_len = get_le16(pb);
348
                        if ((value_type == 0) || (value_type == 1)) // unicode or byte
349
                        {
350
                                if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
351
                                else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
352
                                else url_fskip(pb, value_len);
353
                        }
354
                        if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
355
                        {
356
                                if (value_type==2) value_num = get_le32(pb);
357
                                if (value_type==3) value_num = get_le32(pb);
358
                                if (value_type==4) value_num = get_le64(pb);
359
                                if (value_type==5) value_num = get_le16(pb);
360
                                if (!strcmp(name,"WM/Track"      )) s->track = value_num + 1;
361
                                if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
362
                        }
363
                }
364
        } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
365
            int ext_len, payload_ext_ct, stream_ct;
366
            uint32_t ext_d;
367
            int64_t pos_ex_st;
368
            pos_ex_st = url_ftell(pb);
369

    
370
            get_le64(pb);
371
            get_le64(pb);
372
            get_le32(pb);
373
            get_le32(pb);
374
            get_le32(pb);
375
            get_le32(pb);
376
            get_le32(pb);
377
            get_le32(pb);
378
            get_le32(pb);
379
            get_le32(pb);
380
            get_le16(pb);
381
            get_le16(pb);
382
            get_le64(pb);
383
            stream_ct = get_le16(pb);
384
            payload_ext_ct = get_le16(pb);
385

    
386
            for (i=0; i<stream_ct; i++){
387
                get_le16(pb);
388
                ext_len = get_le16(pb);
389
                url_fseek(pb, ext_len, SEEK_CUR);
390
            }
391

    
392
            for (i=0; i<payload_ext_ct; i++){
393
                get_guid(pb, &g);
394
                ext_d=get_le16(pb);
395
                ext_len=get_le32(pb);
396
                url_fseek(pb, ext_len, SEEK_CUR);
397
            }
398

    
399
            // there could be a optional stream properties object to follow
400
            // if so the next iteration will pick it up
401
        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
402
            int v1, v2;
403
            get_guid(pb, &g);
404
            v1 = get_le32(pb);
405
            v2 = get_le16(pb);
406
#if 0
407
        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
408
            int len, v1, n, num;
409
            char str[256], *q;
410
            char tag[16];
411

412
            get_guid(pb, &g);
413
            print_guid(&g);
414

415
            n = get_le32(pb);
416
            for(i=0;i<n;i++) {
417
                num = get_le16(pb); /* stream number */
418
                get_str16(pb, str, sizeof(str));
419
                get_str16(pb, str, sizeof(str));
420
                len = get_le16(pb);
421
                q = tag;
422
                while (len > 0) {
423
                    v1 = get_byte(pb);
424
                    if ((q - tag) < sizeof(tag) - 1)
425
                        *q++ = v1;
426
                    len--;
427
                }
428
                *q = '\0';
429
            }
430
#endif
431
        } else if (url_feof(pb)) {
432
            goto fail;
433
        } else {
434
            url_fseek(pb, gsize - 24, SEEK_CUR);
435
        }
436
    }
437
    get_guid(pb, &g);
438
    get_le64(pb);
439
    get_byte(pb);
440
    get_byte(pb);
441
    if (url_feof(pb))
442
        goto fail;
443
    asf->data_offset = url_ftell(pb);
444
    asf->packet_size_left = 0;
445

    
446
    return 0;
447

    
448
 fail:
449
     for(i=0;i<s->nb_streams;i++) {
450
        AVStream *st = s->streams[i];
451
        if (st) {
452
            av_free(st->priv_data);
453
            av_free(st->codec->extradata);
454
        }
455
        av_free(st);
456
    }
457
    return -1;
458
}
459

    
460
#define DO_2BITS(bits, var, defval) \
461
    switch (bits & 3) \
462
    { \
463
    case 3: var = get_le32(pb); rsize += 4; break; \
464
    case 2: var = get_le16(pb); rsize += 2; break; \
465
    case 1: var = get_byte(pb); rsize++; break; \
466
    default: var = defval; break; \
467
    }
468

    
469
static int asf_get_packet(AVFormatContext *s)
470
{
471
    ASFContext *asf = s->priv_data;
472
    ByteIOContext *pb = &s->pb;
473
    uint32_t packet_length, padsize;
474
    int rsize = 9;
475
    int c;
476

    
477
    c = get_byte(pb);
478
    if (c != 0x82) {
479
        if (!url_feof(pb))
480
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
481
    }
482
    if ((c & 0x0f) == 2) { // always true for now
483
        if (get_le16(pb) != 0) {
484
            if (!url_feof(pb))
485
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
486
            return AVERROR_IO;
487
        }
488
        rsize+=2;
489
/*    }else{
490
        if (!url_feof(pb))
491
            printf("ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
492
        return AVERROR_IO;*/
493
    }
494

    
495
    asf->packet_flags = get_byte(pb);
496
    asf->packet_property = get_byte(pb);
497

    
498
    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
499
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
500
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
501

    
502
    //the following checks prevent overflows and infinite loops
503
    if(packet_length >= (1U<<29)){
504
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
505
        return 0; // FIXME this should be -1
506
    }
507
    if(padsize >= (1U<<29)){
508
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
509
        return 0; // FIXME this should be -1
510
    }
511

    
512
    asf->packet_timestamp = get_le32(pb);
513
    get_le16(pb); /* duration */
514
    // rsize has at least 11 bytes which have to be present
515

    
516
    if (asf->packet_flags & 0x01) {
517
        asf->packet_segsizetype = get_byte(pb); rsize++;
518
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
519
    } else {
520
        asf->packet_segments = 1;
521
        asf->packet_segsizetype = 0x80;
522
    }
523
    asf->packet_size_left = packet_length - padsize - rsize;
524
    if (packet_length < asf->hdr.min_pktsize)
525
        padsize += asf->hdr.min_pktsize - packet_length;
526
    asf->packet_padsize = padsize;
527
#ifdef DEBUG
528
    printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
529
#endif
530
    return 0;
531
}
532

    
533
/**
534
 *
535
 * @return <0 if error
536
 */
537
static int asf_read_frame_header(AVFormatContext *s){
538
    ASFContext *asf = s->priv_data;
539
    ByteIOContext *pb = &s->pb;
540
    int rsize = 1;
541
    int num = get_byte(pb);
542

    
543
    asf->packet_segments--;
544
    asf->packet_key_frame = num >> 7;
545
    asf->stream_index = asf->asfid2avid[num & 0x7f];
546
    // sequence should be ignored!
547
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
548
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
549
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
550
//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
551
    if (asf->packet_replic_size >= 8) {
552
        asf->packet_obj_size = get_le32(pb);
553
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
554
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
555
            return -1;
556
        }
557
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
558
        url_fskip(pb, asf->packet_replic_size - 8);
559
        rsize += asf->packet_replic_size; // FIXME - check validity
560
    } else if (asf->packet_replic_size==1){
561
        // multipacket - frag_offset is begining timestamp
562
        asf->packet_time_start = asf->packet_frag_offset;
563
        asf->packet_frag_offset = 0;
564
        asf->packet_frag_timestamp = asf->packet_timestamp;
565

    
566
        asf->packet_time_delta = get_byte(pb);
567
        rsize++;
568
    }else if(asf->packet_replic_size!=0){
569
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
570
        return -1;
571
    }
572
    if (asf->packet_flags & 0x01) {
573
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
574
        //printf("Fragsize %d\n", asf->packet_frag_size);
575
    } else {
576
        asf->packet_frag_size = asf->packet_size_left - rsize;
577
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
578
    }
579
    if (asf->packet_replic_size == 1) {
580
        asf->packet_multi_size = asf->packet_frag_size;
581
        if (asf->packet_multi_size > asf->packet_size_left)
582
            return -1;
583
    }
584
    asf->packet_size_left -= rsize;
585
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
586

    
587
    return 0;
588
}
589

    
590
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
591
{
592
    ASFContext *asf = s->priv_data;
593
    ASFStream *asf_st = 0;
594
    ByteIOContext *pb = &s->pb;
595
    //static int pc = 0;
596
    for (;;) {
597
        if (asf->packet_size_left < FRAME_HEADER_SIZE
598
            || asf->packet_segments < 1) {
599
            //asf->packet_size_left <= asf->packet_padsize) {
600
            int ret = asf->packet_size_left + asf->packet_padsize;
601
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
602
            assert(ret>=0);
603
            /* fail safe */
604
            url_fskip(pb, ret);
605

    
606
            ret= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size;
607
            if(asf->hdr.max_pktsize == asf->hdr.min_pktsize && ret){
608
                av_log(s, AV_LOG_ERROR, "packet end missaligned skiping %d\n", ret);
609
                url_fskip(pb, asf->packet_size - ret);
610
            }
611

    
612
            asf->packet_pos= url_ftell(&s->pb);
613
            if (asf->data_object_size != (uint64_t)-1 &&
614
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
615
                return AVERROR_IO; /* Do not exceed the size of the data object */
616
            ret = asf_get_packet(s);
617
            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
618
            if (ret < 0 || url_feof(pb))
619
                return AVERROR_IO;
620
            asf->packet_time_start = 0;
621
            continue;
622
        }
623
        if (asf->packet_time_start == 0) {
624
            if(asf_read_frame_header(s) < 0){
625
                asf->packet_segments= 0;
626
                continue;
627
            }
628
            if (asf->stream_index < 0
629
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
630
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
631
                ) {
632
                asf->packet_time_start = 0;
633
                /* unhandled packet (should not happen) */
634
                url_fskip(pb, asf->packet_frag_size);
635
                asf->packet_size_left -= asf->packet_frag_size;
636
                if(asf->stream_index < 0)
637
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
638
                continue;
639
            }
640
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
641
        }
642
        asf_st = asf->asf_st;
643

    
644
        if (asf->packet_replic_size == 1) {
645
            // frag_offset is here used as the begining timestamp
646
            asf->packet_frag_timestamp = asf->packet_time_start;
647
            asf->packet_time_start += asf->packet_time_delta;
648
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
649
            asf->packet_size_left--;
650
            asf->packet_multi_size--;
651
            if (asf->packet_multi_size < asf->packet_obj_size)
652
            {
653
                asf->packet_time_start = 0;
654
                url_fskip(pb, asf->packet_multi_size);
655
                asf->packet_size_left -= asf->packet_multi_size;
656
                continue;
657
            }
658
            asf->packet_multi_size -= asf->packet_obj_size;
659
            //printf("COMPRESS size  %d  %d  %d   ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
660
        }
661
        if (asf_st->pkt.size != asf->packet_obj_size) { //FIXME is this condition sufficient?
662
            if(asf_st->pkt.data){
663
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
664
                asf_st->frag_offset = 0;
665
                av_free_packet(&asf_st->pkt);
666
            }
667
            /* new packet */
668
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
669
            asf_st->seq = asf->packet_seq;
670
            asf_st->pkt.pts = asf->packet_frag_timestamp;
671
            asf_st->pkt.stream_index = asf->stream_index;
672
            asf_st->pkt.pos =
673
            asf_st->packet_pos= asf->packet_pos;
674
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
675
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
676
//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
677
            if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
678
                asf->packet_key_frame = 1;
679
            if (asf->packet_key_frame)
680
                asf_st->pkt.flags |= PKT_FLAG_KEY;
681
        }
682

    
683
        /* read data */
684
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
685
        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
686
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
687
        asf->packet_size_left -= asf->packet_frag_size;
688
        if (asf->packet_size_left < 0)
689
            continue;
690

    
691
        if(   asf->packet_frag_offset >= asf_st->pkt.size
692
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
693
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
694
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
695
            continue;
696
        }
697

    
698
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
699
                   asf->packet_frag_size);
700
        asf_st->frag_offset += asf->packet_frag_size;
701
        /* test if whole packet is read */
702
        if (asf_st->frag_offset == asf_st->pkt.size) {
703
            /* return packet */
704
            if (asf_st->ds_span > 1) {
705
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
706
                    av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
707
              }else{
708
                /* packet descrambling */
709
                uint8_t *newdata = av_malloc(asf_st->pkt.size);
710
                if (newdata) {
711
                    int offset = 0;
712
                    while (offset < asf_st->pkt.size) {
713
                        int off = offset / asf_st->ds_chunk_size;
714
                        int row = off / asf_st->ds_span;
715
                        int col = off % asf_st->ds_span;
716
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
717
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
718

    
719
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
720
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
721
                        memcpy(newdata + offset,
722
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
723
                               asf_st->ds_chunk_size);
724
                        offset += asf_st->ds_chunk_size;
725
                    }
726
                    av_free(asf_st->pkt.data);
727
                    asf_st->pkt.data = newdata;
728
                }
729
              }
730
            }
731
            asf_st->frag_offset = 0;
732
            *pkt= asf_st->pkt;
733
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
734
            asf_st->pkt.size = 0;
735
            asf_st->pkt.data = 0;
736
            break; // packet completed
737
        }
738
    }
739
    return 0;
740
}
741

    
742
static int asf_read_close(AVFormatContext *s)
743
{
744
    int i;
745

    
746
    for(i=0;i<s->nb_streams;i++) {
747
        AVStream *st = s->streams[i];
748
        av_free(st->priv_data);
749
        av_free(st->codec->palctrl);
750
    }
751
    return 0;
752
}
753

    
754
// Added to support seeking after packets have been read
755
// If information is not reset, read_packet fails due to
756
// leftover information from previous reads
757
static void asf_reset_header(AVFormatContext *s)
758
{
759
    ASFContext *asf = s->priv_data;
760
    ASFStream *asf_st;
761
    int i;
762

    
763
    asf->packet_nb_frames = 0;
764
    asf->packet_size_left = 0;
765
    asf->packet_segments = 0;
766
    asf->packet_flags = 0;
767
    asf->packet_property = 0;
768
    asf->packet_timestamp = 0;
769
    asf->packet_segsizetype = 0;
770
    asf->packet_segments = 0;
771
    asf->packet_seq = 0;
772
    asf->packet_replic_size = 0;
773
    asf->packet_key_frame = 0;
774
    asf->packet_padsize = 0;
775
    asf->packet_frag_offset = 0;
776
    asf->packet_frag_size = 0;
777
    asf->packet_frag_timestamp = 0;
778
    asf->packet_multi_size = 0;
779
    asf->packet_obj_size = 0;
780
    asf->packet_time_delta = 0;
781
    asf->packet_time_start = 0;
782

    
783
    for(i=0; i<s->nb_streams; i++){
784
        asf_st= s->streams[i]->priv_data;
785
        av_free_packet(&asf_st->pkt);
786
        asf_st->frag_offset=0;
787
        asf_st->seq=0;
788
    }
789
    asf->asf_st= NULL;
790
}
791

    
792
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
793
{
794
    ASFContext *asf = s->priv_data;
795
    AVPacket pkt1, *pkt = &pkt1;
796
    ASFStream *asf_st;
797
    int64_t pts;
798
    int64_t pos= *ppos;
799
    int i;
800
    int64_t start_pos[s->nb_streams];
801

    
802
    for(i=0; i<s->nb_streams; i++){
803
        start_pos[i]= pos;
804
    }
805

    
806
    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
807
    *ppos= pos;
808
    url_fseek(&s->pb, pos, SEEK_SET);
809

    
810
//printf("asf_read_pts\n");
811
    asf_reset_header(s);
812
    for(;;){
813
        if (av_read_frame(s, pkt) < 0){
814
            av_log(s, AV_LOG_INFO, "seek failed\n");
815
            return AV_NOPTS_VALUE;
816
        }
817

    
818
        pts= pkt->pts;
819

    
820
        av_free_packet(pkt);
821
        if(pkt->flags&PKT_FLAG_KEY){
822
            i= pkt->stream_index;
823

    
824
            asf_st= s->streams[i]->priv_data;
825

    
826
            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
827
            pos= asf_st->packet_pos;
828

    
829
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
830
            start_pos[i]= asf_st->packet_pos + 1;
831

    
832
            if(pkt->stream_index == stream_index)
833
               break;
834
        }
835
    }
836

    
837
    *ppos= pos;
838
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
839

    
840
    return pts;
841
}
842

    
843
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
844
{
845
    GUID g;
846
    ASFContext *asf = s->priv_data;
847
    int64_t gsize, itime;
848
    int64_t pos, current_pos, index_pts;
849
    int i;
850
    int pct,ict;
851

    
852
    current_pos = url_ftell(&s->pb);
853

    
854
    url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
855
    get_guid(&s->pb, &g);
856
    if (!memcmp(&g, &index_guid, sizeof(GUID))) {
857
        gsize = get_le64(&s->pb);
858
        get_guid(&s->pb, &g);
859
        itime=get_le64(&s->pb);
860
        pct=get_le32(&s->pb);
861
        ict=get_le32(&s->pb);
862
        av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
863

    
864
        for (i=0;i<ict;i++){
865
            int pktnum=get_le32(&s->pb);
866
            int pktct =get_le16(&s->pb);
867
            av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
868

    
869
            pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
870
            index_pts=av_rescale(itime, i, 10000);
871

    
872
            av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
873
        }
874
        asf->index_read= 1;
875
    }
876
    url_fseek(&s->pb, current_pos, SEEK_SET);
877
}
878

    
879
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
880
{
881
    ASFContext *asf = s->priv_data;
882
    AVStream *st = s->streams[stream_index];
883
    int64_t pos;
884
    int index;
885

    
886
    if (asf->packet_size <= 0)
887
        return -1;
888

    
889
    if (!asf->index_read)
890
        asf_build_simple_index(s, stream_index);
891

    
892
    if(!(asf->index_read && st->index_entries)){
893
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
894
            return -1;
895
    }else{
896
        index= av_index_search_timestamp(st, pts, flags);
897
        if(index<0)
898
            return -1;
899

    
900
        /* find the position */
901
        pos = st->index_entries[index].pos;
902
        pts = st->index_entries[index].timestamp;
903

    
904
    // various attempts to find key frame have failed so far
905
    //    asf_reset_header(s);
906
    //    url_fseek(&s->pb, pos, SEEK_SET);
907
    //    key_pos = pos;
908
    //     for(i=0;i<16;i++){
909
    //         pos = url_ftell(&s->pb);
910
    //         if (av_read_frame(s, &pkt) < 0){
911
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
912
    //             return -1;
913
    //         }
914
    //         asf_st = s->streams[stream_index]->priv_data;
915
    //         pos += st->parser->frame_offset;
916
    //
917
    //         if (pkt.size > b) {
918
    //             b = pkt.size;
919
    //             key_pos = pos;
920
    //         }
921
    //
922
    //         av_free_packet(&pkt);
923
    //     }
924

    
925
        /* do the seek */
926
        av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
927
        url_fseek(&s->pb, pos, SEEK_SET);
928
    }
929
    asf_reset_header(s);
930
    return 0;
931
}
932

    
933
AVInputFormat asf_demuxer = {
934
    "asf",
935
    "asf format",
936
    sizeof(ASFContext),
937
    asf_probe,
938
    asf_read_header,
939
    asf_read_packet,
940
    asf_read_close,
941
    asf_read_seek,
942
    asf_read_pts,
943
};