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1
/*
2
 * ASF compatible demuxer
3
 * Copyright (c) 2000, 2001 Fabrice Bellard
4
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * 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
 * Libav 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 Libav; 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
//#define DEBUG
23

    
24
#include "libavutil/common.h"
25
#include "libavutil/avstring.h"
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#include "libavcodec/mpegaudio.h"
27
#include "avformat.h"
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#include "avio_internal.h"
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#include "riff.h"
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#include "asf.h"
31
#include "asfcrypt.h"
32
#include "avlanguage.h"
33

    
34
typedef struct {
35
    int asfid2avid[128];                 ///< conversion table from asf ID 2 AVStream ID
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    ASFStream streams[128];              ///< it's max number and it's not that big
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    uint32_t stream_bitrates[128];       ///< max number of streams, bitrate for each (for streaming)
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    AVRational dar[128];
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    char stream_languages[128][6];       ///< max number of streams, language for each (RFC1766, e.g. en-US)
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    /* non streamed additonnal info */
41
    /* packet filling */
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    int packet_size_left;
43
    /* only for reading */
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    uint64_t data_offset;                ///< beginning of the first data packet
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    uint64_t data_object_offset;         ///< data object offset (excl. GUID & size)
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    uint64_t data_object_size;           ///< size of the data object
47
    int index_read;
48

    
49
    ASFMainHeader hdr;
50

    
51
    int packet_flags;
52
    int packet_property;
53
    int packet_timestamp;
54
    int packet_segsizetype;
55
    int packet_segments;
56
    int packet_seq;
57
    int packet_replic_size;
58
    int packet_key_frame;
59
    int packet_padsize;
60
    unsigned int packet_frag_offset;
61
    unsigned int packet_frag_size;
62
    int64_t packet_frag_timestamp;
63
    int packet_multi_size;
64
    int packet_obj_size;
65
    int packet_time_delta;
66
    int packet_time_start;
67
    int64_t packet_pos;
68

    
69
    int stream_index;
70

    
71
    ASFStream* asf_st;                   ///< currently decoded stream
72
} ASFContext;
73

    
74
#undef NDEBUG
75
#include <assert.h>
76

    
77
#define ASF_MAX_STREAMS 127
78
#define FRAME_HEADER_SIZE 17
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// Fix Me! FRAME_HEADER_SIZE may be different.
80

    
81
static const ff_asf_guid index_guid = {
82
    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
83
};
84

    
85
static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
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    0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
87
};
88
/**********************************/
89
/* decoding */
90

    
91
#ifdef DEBUG
92
#define PRINT_IF_GUID(g,cmp) \
93
if (!ff_guidcmp(g, &cmp)) \
94
    av_dlog(NULL, "(GUID: %s) ", #cmp)
95

    
96
static void print_guid(const ff_asf_guid *g)
97
{
98
    int i;
99
    PRINT_IF_GUID(g, ff_asf_header);
100
    else PRINT_IF_GUID(g, ff_asf_file_header);
101
    else PRINT_IF_GUID(g, ff_asf_stream_header);
102
    else PRINT_IF_GUID(g, ff_asf_audio_stream);
103
    else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
104
    else PRINT_IF_GUID(g, ff_asf_video_stream);
105
    else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
106
    else PRINT_IF_GUID(g, ff_asf_command_stream);
107
    else PRINT_IF_GUID(g, ff_asf_comment_header);
108
    else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
109
    else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
110
    else PRINT_IF_GUID(g, ff_asf_data_header);
111
    else PRINT_IF_GUID(g, index_guid);
112
    else PRINT_IF_GUID(g, ff_asf_head1_guid);
113
    else PRINT_IF_GUID(g, ff_asf_head2_guid);
114
    else PRINT_IF_GUID(g, ff_asf_my_guid);
115
    else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
116
    else PRINT_IF_GUID(g, ff_asf_extended_content_header);
117
    else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
118
    else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
119
    else PRINT_IF_GUID(g, ff_asf_metadata_header);
120
    else PRINT_IF_GUID(g, ff_asf_marker_header);
121
    else PRINT_IF_GUID(g, stream_bitrate_guid);
122
    else PRINT_IF_GUID(g, ff_asf_language_guid);
123
    else
124
        av_dlog(NULL, "(GUID: unknown) ");
125
    for(i=0;i<16;i++)
126
        av_dlog(NULL, " 0x%02x,", (*g)[i]);
127
    av_dlog(NULL, "}\n");
128
}
129
#undef PRINT_IF_GUID
130
#else
131
#define print_guid(g)
132
#endif
133

    
134
void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
135
{
136
    assert(sizeof(*g) == 16);
137
    avio_read(s, *g, sizeof(*g));
138
}
139

    
140
static int asf_probe(AVProbeData *pd)
141
{
142
    /* check file header */
143
    if (!ff_guidcmp(pd->buf, &ff_asf_header))
144
        return AVPROBE_SCORE_MAX;
145
    else
146
        return 0;
147
}
148

    
149
static int get_value(AVIOContext *pb, int type){
150
    switch(type){
151
        case 2: return avio_rl32(pb);
152
        case 3: return avio_rl32(pb);
153
        case 4: return avio_rl64(pb);
154
        case 5: return avio_rl16(pb);
155
        default:return INT_MIN;
156
    }
157
}
158

    
159
static void get_tag(AVFormatContext *s, const char *key, int type, int len)
160
{
161
    char *value;
162
    int64_t off = avio_tell(s->pb);
163

    
164
    if ((unsigned)len >= (UINT_MAX - 1)/2)
165
        return;
166

    
167
    value = av_malloc(2*len+1);
168
    if (!value)
169
        goto finish;
170

    
171
    if (type == 0) {         // UTF16-LE
172
        avio_get_str16le(s->pb, len, value, 2*len + 1);
173
    } else if (type > 1 && type <= 5) {  // boolean or DWORD or QWORD or WORD
174
        uint64_t num = get_value(s->pb, type);
175
        snprintf(value, len, "%"PRIu64, num);
176
    } else {
177
        av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
178
        goto finish;
179
    }
180
    if (*value)
181
        av_metadata_set2(&s->metadata, key, value, 0);
182
finish:
183
    av_freep(&value);
184
    avio_seek(s->pb, off + len, SEEK_SET);
185
}
186

    
187
static int asf_read_file_properties(AVFormatContext *s, int64_t size)
188
{
189
    ASFContext *asf = s->priv_data;
190
    AVIOContext *pb = s->pb;
191

    
192
    ff_get_guid(pb, &asf->hdr.guid);
193
    asf->hdr.file_size          = avio_rl64(pb);
194
    asf->hdr.create_time        = avio_rl64(pb);
195
    avio_rl64(pb);                               /* number of packets */
196
    asf->hdr.play_time          = avio_rl64(pb);
197
    asf->hdr.send_time          = avio_rl64(pb);
198
    asf->hdr.preroll            = avio_rl32(pb);
199
    asf->hdr.ignore             = avio_rl32(pb);
200
    asf->hdr.flags              = avio_rl32(pb);
201
    asf->hdr.min_pktsize        = avio_rl32(pb);
202
    asf->hdr.max_pktsize        = avio_rl32(pb);
203
    asf->hdr.max_bitrate        = avio_rl32(pb);
204
    s->packet_size = asf->hdr.max_pktsize;
205

    
206
    return 0;
207
}
208

    
209
static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
210
{
211
    ASFContext *asf = s->priv_data;
212
    AVIOContext *pb = s->pb;
213
    AVStream *st;
214
    ASFStream *asf_st;
215
    ff_asf_guid g;
216
    enum AVMediaType type;
217
    int type_specific_size, sizeX;
218
    uint64_t total_size;
219
    unsigned int tag1;
220
    int64_t pos1, pos2, start_time;
221
    int test_for_ext_stream_audio, is_dvr_ms_audio=0;
222

    
223
    if (s->nb_streams == ASF_MAX_STREAMS) {
224
        av_log(s, AV_LOG_ERROR, "too many streams\n");
225
        return AVERROR(EINVAL);
226
    }
227

    
228
    pos1 = avio_tell(pb);
229

    
230
    st = av_new_stream(s, 0);
231
    if (!st)
232
        return AVERROR(ENOMEM);
233
    av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
234
    asf_st = av_mallocz(sizeof(ASFStream));
235
    if (!asf_st)
236
        return AVERROR(ENOMEM);
237
    st->priv_data = asf_st;
238
    st->start_time = 0;
239
    start_time = asf->hdr.preroll;
240

    
241
    asf_st->stream_language_index = 128; // invalid stream index means no language info
242

    
243
    if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
244
        st->duration = asf->hdr.play_time /
245
            (10000000 / 1000) - start_time;
246
    }
247
    ff_get_guid(pb, &g);
248

    
249
    test_for_ext_stream_audio = 0;
250
    if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
251
        type = AVMEDIA_TYPE_AUDIO;
252
    } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
253
        type = AVMEDIA_TYPE_VIDEO;
254
    } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
255
        type = AVMEDIA_TYPE_VIDEO;
256
        st->codec->codec_id = CODEC_ID_MJPEG;
257
    } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
258
        type = AVMEDIA_TYPE_DATA;
259
    } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
260
        test_for_ext_stream_audio = 1;
261
        type = AVMEDIA_TYPE_UNKNOWN;
262
    } else {
263
        return -1;
264
    }
265
    ff_get_guid(pb, &g);
266
    total_size = avio_rl64(pb);
267
    type_specific_size = avio_rl32(pb);
268
    avio_rl32(pb);
269
    st->id = avio_rl16(pb) & 0x7f; /* stream id */
270
    // mapping of asf ID to AV stream ID;
271
    asf->asfid2avid[st->id] = s->nb_streams - 1;
272

    
273
    avio_rl32(pb);
274

    
275
    if (test_for_ext_stream_audio) {
276
        ff_get_guid(pb, &g);
277
        if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
278
            type = AVMEDIA_TYPE_AUDIO;
279
            is_dvr_ms_audio=1;
280
            ff_get_guid(pb, &g);
281
            avio_rl32(pb);
282
            avio_rl32(pb);
283
            avio_rl32(pb);
284
            ff_get_guid(pb, &g);
285
            avio_rl32(pb);
286
        }
287
    }
288

    
289
    st->codec->codec_type = type;
290
    if (type == AVMEDIA_TYPE_AUDIO) {
291
        int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
292
        if (ret < 0)
293
            return ret;
294
        if (is_dvr_ms_audio) {
295
            // codec_id and codec_tag are unreliable in dvr_ms
296
            // files. Set them later by probing stream.
297
            st->codec->codec_id = CODEC_ID_PROBE;
298
            st->codec->codec_tag = 0;
299
        }
300
        if (st->codec->codec_id == CODEC_ID_AAC) {
301
            st->need_parsing = AVSTREAM_PARSE_NONE;
302
        } else {
303
            st->need_parsing = AVSTREAM_PARSE_FULL;
304
        }
305
        /* We have to init the frame size at some point .... */
306
        pos2 = avio_tell(pb);
307
        if (size >= (pos2 + 8 - pos1 + 24)) {
308
            asf_st->ds_span = avio_r8(pb);
309
            asf_st->ds_packet_size = avio_rl16(pb);
310
            asf_st->ds_chunk_size = avio_rl16(pb);
311
            avio_rl16(pb); //ds_data_size
312
            avio_r8(pb);   //ds_silence_data
313
        }
314
        //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
315
        //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
316
        //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
317
        if (asf_st->ds_span > 1) {
318
            if (!asf_st->ds_chunk_size
319
                    || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
320
                    || asf_st->ds_packet_size % asf_st->ds_chunk_size)
321
                asf_st->ds_span = 0; // disable descrambling
322
        }
323
        switch (st->codec->codec_id) {
324
            case CODEC_ID_MP3:
325
                st->codec->frame_size = MPA_FRAME_SIZE;
326
                break;
327
            case CODEC_ID_PCM_S16LE:
328
            case CODEC_ID_PCM_S16BE:
329
            case CODEC_ID_PCM_U16LE:
330
            case CODEC_ID_PCM_U16BE:
331
            case CODEC_ID_PCM_S8:
332
            case CODEC_ID_PCM_U8:
333
            case CODEC_ID_PCM_ALAW:
334
            case CODEC_ID_PCM_MULAW:
335
                st->codec->frame_size = 1;
336
                break;
337
            default:
338
                /* This is probably wrong, but it prevents a crash later */
339
                st->codec->frame_size = 1;
340
                break;
341
        }
342
    } else if (type == AVMEDIA_TYPE_VIDEO &&
343
            size - (avio_tell(pb) - pos1 + 24) >= 51) {
344
        avio_rl32(pb);
345
        avio_rl32(pb);
346
        avio_r8(pb);
347
        avio_rl16(pb);        /* size */
348
        sizeX= avio_rl32(pb); /* size */
349
        st->codec->width = avio_rl32(pb);
350
        st->codec->height = avio_rl32(pb);
351
        /* not available for asf */
352
        avio_rl16(pb); /* panes */
353
        st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
354
        tag1 = avio_rl32(pb);
355
        avio_skip(pb, 20);
356
        //                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
357
        if (sizeX > 40) {
358
            st->codec->extradata_size = sizeX - 40;
359
            st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
360
            avio_read(pb, st->codec->extradata, st->codec->extradata_size);
361
        }
362

    
363
        /* Extract palette from extradata if bpp <= 8 */
364
        /* This code assumes that extradata contains only palette */
365
        /* This is true for all paletted codecs implemented in ffmpeg */
366
        if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
367
            int av_unused i;
368
            st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
369
#if HAVE_BIGENDIAN
370
            for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
371
                st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
372
#else
373
            memcpy(st->codec->palctrl->palette, st->codec->extradata,
374
                    FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
375
#endif
376
            st->codec->palctrl->palette_changed = 1;
377
        }
378

    
379
        st->codec->codec_tag = tag1;
380
        st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
381
        if(tag1 == MKTAG('D', 'V', 'R', ' ')){
382
            st->need_parsing = AVSTREAM_PARSE_FULL;
383
            // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
384
            st->codec->width  =
385
                st->codec->height = 0;
386
            av_freep(&st->codec->extradata);
387
            st->codec->extradata_size=0;
388
        }
389
        if(st->codec->codec_id == CODEC_ID_H264)
390
            st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
391
    }
392
    pos2 = avio_tell(pb);
393
    avio_skip(pb, size - (pos2 - pos1 + 24));
394

    
395
    return 0;
396
}
397

    
398
static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
399
{
400
    ASFContext *asf = s->priv_data;
401
    AVIOContext *pb = s->pb;
402
    ff_asf_guid g;
403
    int ext_len, payload_ext_ct, stream_ct, i;
404
    uint32_t ext_d, leak_rate, stream_num;
405
    unsigned int stream_languageid_index;
406

    
407
    avio_rl64(pb); // starttime
408
    avio_rl64(pb); // endtime
409
    leak_rate = avio_rl32(pb); // leak-datarate
410
    avio_rl32(pb); // bucket-datasize
411
    avio_rl32(pb); // init-bucket-fullness
412
    avio_rl32(pb); // alt-leak-datarate
413
    avio_rl32(pb); // alt-bucket-datasize
414
    avio_rl32(pb); // alt-init-bucket-fullness
415
    avio_rl32(pb); // max-object-size
416
    avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
417
    stream_num = avio_rl16(pb); // stream-num
418

    
419
    stream_languageid_index = avio_rl16(pb); // stream-language-id-index
420
    if (stream_num < 128)
421
        asf->streams[stream_num].stream_language_index = stream_languageid_index;
422

    
423
    avio_rl64(pb); // avg frametime in 100ns units
424
    stream_ct = avio_rl16(pb); //stream-name-count
425
    payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
426

    
427
    if (stream_num < 128)
428
        asf->stream_bitrates[stream_num] = leak_rate;
429

    
430
    for (i=0; i<stream_ct; i++){
431
        avio_rl16(pb);
432
        ext_len = avio_rl16(pb);
433
        avio_skip(pb, ext_len);
434
    }
435

    
436
    for (i=0; i<payload_ext_ct; i++){
437
        ff_get_guid(pb, &g);
438
        ext_d=avio_rl16(pb);
439
        ext_len=avio_rl32(pb);
440
        avio_skip(pb, ext_len);
441
    }
442

    
443
    return 0;
444
}
445

    
446
static int asf_read_content_desc(AVFormatContext *s, int64_t size)
447
{
448
    AVIOContext *pb = s->pb;
449
    int len1, len2, len3, len4, len5;
450

    
451
    len1 = avio_rl16(pb);
452
    len2 = avio_rl16(pb);
453
    len3 = avio_rl16(pb);
454
    len4 = avio_rl16(pb);
455
    len5 = avio_rl16(pb);
456
    get_tag(s, "title"    , 0, len1);
457
    get_tag(s, "author"   , 0, len2);
458
    get_tag(s, "copyright", 0, len3);
459
    get_tag(s, "comment"  , 0, len4);
460
    avio_skip(pb, len5);
461

    
462
    return 0;
463
}
464

    
465
static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
466
{
467
    AVIOContext *pb = s->pb;
468
    ASFContext *asf = s->priv_data;
469
    int desc_count, i, ret;
470

    
471
    desc_count = avio_rl16(pb);
472
    for(i=0;i<desc_count;i++) {
473
        int name_len,value_type,value_len;
474
        char name[1024];
475

    
476
        name_len = avio_rl16(pb);
477
        if (name_len%2)     // must be even, broken lavf versions wrote len-1
478
            name_len += 1;
479
        if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
480
            avio_skip(pb, name_len - ret);
481
        value_type = avio_rl16(pb);
482
        value_len  = avio_rl16(pb);
483
        if (!value_type && value_len%2)
484
            value_len += 1;
485
        /**
486
         * My sample has that stream set to 0 maybe that mean the container.
487
         * Asf stream count start at 1. I am using 0 to the container value since it's unused
488
         */
489
        if (!strcmp(name, "AspectRatioX")){
490
            asf->dar[0].num= get_value(s->pb, value_type);
491
        } else if(!strcmp(name, "AspectRatioY")){
492
            asf->dar[0].den= get_value(s->pb, value_type);
493
        } else
494
            get_tag(s, name, value_type, value_len);
495
    }
496

    
497
    return 0;
498
}
499

    
500
static int asf_read_language_list(AVFormatContext *s, int64_t size)
501
{
502
    AVIOContext *pb = s->pb;
503
    ASFContext *asf = s->priv_data;
504
    int j, ret;
505
    int stream_count = avio_rl16(pb);
506
    for(j = 0; j < stream_count; j++) {
507
        char lang[6];
508
        unsigned int lang_len = avio_r8(pb);
509
        if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
510
            avio_skip(pb, lang_len - ret);
511
        if (j < 128)
512
            av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
513
    }
514

    
515
    return 0;
516
}
517

    
518
static int asf_read_metadata(AVFormatContext *s, int64_t size)
519
{
520
    AVIOContext *pb = s->pb;
521
    ASFContext *asf = s->priv_data;
522
    int n, stream_num, name_len, value_len, value_type, value_num;
523
    int ret, i;
524
    n = avio_rl16(pb);
525

    
526
    for(i=0;i<n;i++) {
527
        char name[1024];
528

    
529
        avio_rl16(pb); //lang_list_index
530
        stream_num= avio_rl16(pb);
531
        name_len=   avio_rl16(pb);
532
        value_type= avio_rl16(pb);
533
        value_len=  avio_rl32(pb);
534

    
535
        if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
536
            avio_skip(pb, name_len - ret);
537
        //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
538
        value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
539
        avio_skip(pb, value_len - 2);
540

    
541
        if(stream_num<128){
542
            if     (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
543
            else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num;
544
        }
545
    }
546

    
547
    return 0;
548
}
549

    
550
static int asf_read_marker(AVFormatContext *s, int64_t size)
551
{
552
    AVIOContext *pb = s->pb;
553
    int i, count, name_len, ret;
554
    char name[1024];
555

    
556
    avio_rl64(pb);            // reserved 16 bytes
557
    avio_rl64(pb);            // ...
558
    count = avio_rl32(pb);    // markers count
559
    avio_rl16(pb);            // reserved 2 bytes
560
    name_len = avio_rl16(pb); // name length
561
    for(i=0;i<name_len;i++){
562
        avio_r8(pb); // skip the name
563
    }
564

    
565
    for(i=0;i<count;i++){
566
        int64_t pres_time;
567
        int name_len;
568

    
569
        avio_rl64(pb);             // offset, 8 bytes
570
        pres_time = avio_rl64(pb); // presentation time
571
        avio_rl16(pb);             // entry length
572
        avio_rl32(pb);             // send time
573
        avio_rl32(pb);             // flags
574
        name_len = avio_rl32(pb);  // name length
575
        if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
576
            avio_skip(pb, name_len - ret);
577
        ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
578
    }
579

    
580
    return 0;
581
}
582

    
583
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
584
{
585
    ASFContext *asf = s->priv_data;
586
    ff_asf_guid g;
587
    AVIOContext *pb = s->pb;
588
    int i;
589
    int64_t gsize;
590

    
591
    ff_get_guid(pb, &g);
592
    if (ff_guidcmp(&g, &ff_asf_header))
593
        return -1;
594
    avio_rl64(pb);
595
    avio_rl32(pb);
596
    avio_r8(pb);
597
    avio_r8(pb);
598
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
599
    for(;;) {
600
        uint64_t gpos= avio_tell(pb);
601
        ff_get_guid(pb, &g);
602
        gsize = avio_rl64(pb);
603
        av_dlog(s, "%08"PRIx64": ", gpos);
604
        print_guid(&g);
605
        av_dlog(s, "  size=0x%"PRIx64"\n", gsize);
606
        if (!ff_guidcmp(&g, &ff_asf_data_header)) {
607
            asf->data_object_offset = avio_tell(pb);
608
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
609
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
610
                asf->data_object_size = gsize - 24;
611
            } else {
612
                asf->data_object_size = (uint64_t)-1;
613
            }
614
            break;
615
        }
616
        if (gsize < 24)
617
            return -1;
618
        if (!ff_guidcmp(&g, &ff_asf_file_header)) {
619
            asf_read_file_properties(s, gsize);
620
        } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
621
            asf_read_stream_properties(s, gsize);
622
        } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
623
            asf_read_content_desc(s, gsize);
624
        } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
625
            asf_read_language_list(s, gsize);
626
        } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
627
            asf_read_ext_content_desc(s, gsize);
628
        } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
629
            asf_read_metadata(s, gsize);
630
        } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
631
            asf_read_ext_stream_properties(s, gsize);
632

    
633
            // there could be a optional stream properties object to follow
634
            // if so the next iteration will pick it up
635
            continue;
636
        } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
637
            int v1, v2;
638
            ff_get_guid(pb, &g);
639
            v1 = avio_rl32(pb);
640
            v2 = avio_rl16(pb);
641
            continue;
642
        } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
643
            asf_read_marker(s, gsize);
644
        } else if (pb->eof_reached) {
645
            return -1;
646
        } else {
647
            if (!s->keylen) {
648
                if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
649
                    av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
650
                } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
651
                    av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
652
                } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
653
                    av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
654
                }
655
            }
656
        }
657
        if(avio_tell(pb) != gpos + gsize)
658
            av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize);
659
        avio_seek(pb, gpos + gsize, SEEK_SET);
660
    }
661
    ff_get_guid(pb, &g);
662
    avio_rl64(pb);
663
    avio_r8(pb);
664
    avio_r8(pb);
665
    if (pb->eof_reached)
666
        return -1;
667
    asf->data_offset = avio_tell(pb);
668
    asf->packet_size_left = 0;
669

    
670

    
671
    for(i=0; i<128; i++){
672
        int stream_num= asf->asfid2avid[i];
673
        if(stream_num>=0){
674
            AVStream *st = s->streams[stream_num];
675
            if (!st->codec->bit_rate)
676
                st->codec->bit_rate = asf->stream_bitrates[i];
677
            if (asf->dar[i].num > 0 && asf->dar[i].den > 0){
678
                av_reduce(&st->sample_aspect_ratio.num,
679
                          &st->sample_aspect_ratio.den,
680
                          asf->dar[i].num, asf->dar[i].den, INT_MAX);
681
            } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
682
                av_reduce(&st->sample_aspect_ratio.num,
683
                          &st->sample_aspect_ratio.den,
684
                          asf->dar[0].num, asf->dar[0].den, INT_MAX);
685

    
686
//av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
687

    
688
            // copy and convert language codes to the frontend
689
            if (asf->streams[i].stream_language_index < 128) {
690
                const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
691
                if (rfc1766 && strlen(rfc1766) > 1) {
692
                    const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
693
                    const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
694
                    if (iso6392)
695
                        av_metadata_set2(&st->metadata, "language", iso6392, 0);
696
                }
697
            }
698
        }
699
    }
700

    
701
    ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
702

    
703
    return 0;
704
}
705

    
706
#define DO_2BITS(bits, var, defval) \
707
    switch (bits & 3) \
708
    { \
709
    case 3: var = avio_rl32(pb); rsize += 4; break; \
710
    case 2: var = avio_rl16(pb); rsize += 2; break; \
711
    case 1: var = avio_r8(pb);   rsize++; break; \
712
    default: var = defval; break; \
713
    }
714

    
715
/**
716
 * Load a single ASF packet into the demuxer.
717
 * @param s demux context
718
 * @param pb context to read data from
719
 * @return 0 on success, <0 on error
720
 */
721
static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
722
{
723
    ASFContext *asf = s->priv_data;
724
    uint32_t packet_length, padsize;
725
    int rsize = 8;
726
    int c, d, e, off;
727

    
728
    // if we do not know packet size, allow skipping up to 32 kB
729
    off= 32768;
730
    if (s->packet_size > 0)
731
        off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
732

    
733
    c=d=e=-1;
734
    while(off-- > 0){
735
        c=d; d=e;
736
        e= avio_r8(pb);
737
        if(c == 0x82 && !d && !e)
738
            break;
739
    }
740

    
741
    if (c != 0x82) {
742
        /**
743
         * This code allows handling of -EAGAIN at packet boundaries (i.e.
744
         * if the packet sync code above triggers -EAGAIN). This does not
745
         * imply complete -EAGAIN handling support at random positions in
746
         * the stream.
747
         */
748
        if (pb->error == AVERROR(EAGAIN))
749
            return AVERROR(EAGAIN);
750
        if (!pb->eof_reached)
751
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, avio_tell(pb));
752
    }
753
    if ((c & 0x8f) == 0x82) {
754
        if (d || e) {
755
            if (!pb->eof_reached)
756
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
757
            return -1;
758
        }
759
        c= avio_r8(pb);
760
        d= avio_r8(pb);
761
        rsize+=3;
762
    }else{
763
        avio_seek(pb, -1, SEEK_CUR); //FIXME
764
    }
765

    
766
    asf->packet_flags    = c;
767
    asf->packet_property = d;
768

    
769
    DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
770
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
771
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
772

    
773
    //the following checks prevent overflows and infinite loops
774
    if(!packet_length || packet_length >= (1U<<29)){
775
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb));
776
        return -1;
777
    }
778
    if(padsize >= packet_length){
779
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
780
        return -1;
781
    }
782

    
783
    asf->packet_timestamp = avio_rl32(pb);
784
    avio_rl16(pb); /* duration */
785
    // rsize has at least 11 bytes which have to be present
786

    
787
    if (asf->packet_flags & 0x01) {
788
        asf->packet_segsizetype = avio_r8(pb); rsize++;
789
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
790
    } else {
791
        asf->packet_segments = 1;
792
        asf->packet_segsizetype = 0x80;
793
    }
794
    asf->packet_size_left = packet_length - padsize - rsize;
795
    if (packet_length < asf->hdr.min_pktsize)
796
        padsize += asf->hdr.min_pktsize - packet_length;
797
    asf->packet_padsize = padsize;
798
    av_dlog(s, "packet: size=%d padsize=%d  left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
799
    return 0;
800
}
801

    
802
/**
803
 *
804
 * @return <0 if error
805
 */
806
static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
807
    ASFContext *asf = s->priv_data;
808
    int rsize = 1;
809
    int num = avio_r8(pb);
810
    int64_t ts0, ts1;
811

    
812
    asf->packet_segments--;
813
    asf->packet_key_frame = num >> 7;
814
    asf->stream_index = asf->asfid2avid[num & 0x7f];
815
    // sequence should be ignored!
816
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
817
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
818
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
819
//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);
820
    if (asf->packet_replic_size >= 8) {
821
        asf->packet_obj_size = avio_rl32(pb);
822
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
823
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
824
            return -1;
825
        }
826
        asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
827
        if(asf->packet_replic_size >= 8+38+4){
828
//            for(i=0; i<asf->packet_replic_size-8; i++)
829
//                av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
830
//            av_log(s, AV_LOG_DEBUG, "\n");
831
            avio_skip(pb, 10);
832
            ts0= avio_rl64(pb);
833
            ts1= avio_rl64(pb);
834
            avio_skip(pb, 12);
835
            avio_rl32(pb);
836
            avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
837
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
838
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
839
        }else
840
            avio_skip(pb, asf->packet_replic_size - 8);
841
        rsize += asf->packet_replic_size; // FIXME - check validity
842
    } else if (asf->packet_replic_size==1){
843
        // multipacket - frag_offset is beginning timestamp
844
        asf->packet_time_start = asf->packet_frag_offset;
845
        asf->packet_frag_offset = 0;
846
        asf->packet_frag_timestamp = asf->packet_timestamp;
847

    
848
        asf->packet_time_delta = avio_r8(pb);
849
        rsize++;
850
    }else if(asf->packet_replic_size!=0){
851
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
852
        return -1;
853
    }
854
    if (asf->packet_flags & 0x01) {
855
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
856
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
857
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
858
            return -1;
859
        }
860
        //printf("Fragsize %d\n", asf->packet_frag_size);
861
    } else {
862
        asf->packet_frag_size = asf->packet_size_left - rsize;
863
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
864
    }
865
    if (asf->packet_replic_size == 1) {
866
        asf->packet_multi_size = asf->packet_frag_size;
867
        if (asf->packet_multi_size > asf->packet_size_left)
868
            return -1;
869
    }
870
    asf->packet_size_left -= rsize;
871
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
872

    
873
    return 0;
874
}
875

    
876
/**
877
 * Parse data from individual ASF packets (which were previously loaded
878
 * with asf_get_packet()).
879
 * @param s demux context
880
 * @param pb context to read data from
881
 * @param pkt pointer to store packet data into
882
 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
883
 *          packets need to be loaded (through asf_get_packet())
884
 */
885
static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
886
{
887
    ASFContext *asf = s->priv_data;
888
    ASFStream *asf_st = 0;
889
    for (;;) {
890
        int ret;
891
        if(pb->eof_reached)
892
            return AVERROR_EOF;
893
        if (asf->packet_size_left < FRAME_HEADER_SIZE
894
            || asf->packet_segments < 1) {
895
            //asf->packet_size_left <= asf->packet_padsize) {
896
            int ret = asf->packet_size_left + asf->packet_padsize;
897
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
898
            assert(ret>=0);
899
            /* fail safe */
900
            avio_skip(pb, ret);
901

    
902
            asf->packet_pos= avio_tell(pb);
903
            if (asf->data_object_size != (uint64_t)-1 &&
904
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
905
                return AVERROR_EOF; /* Do not exceed the size of the data object */
906
            return 1;
907
        }
908
        if (asf->packet_time_start == 0) {
909
            if(asf_read_frame_header(s, pb) < 0){
910
                asf->packet_segments= 0;
911
                continue;
912
            }
913
            if (asf->stream_index < 0
914
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
915
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
916
                ) {
917
                asf->packet_time_start = 0;
918
                /* unhandled packet (should not happen) */
919
                avio_skip(pb, asf->packet_frag_size);
920
                asf->packet_size_left -= asf->packet_frag_size;
921
                if(asf->stream_index < 0)
922
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
923
                continue;
924
            }
925
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
926
        }
927
        asf_st = asf->asf_st;
928

    
929
        if (asf->packet_replic_size == 1) {
930
            // frag_offset is here used as the beginning timestamp
931
            asf->packet_frag_timestamp = asf->packet_time_start;
932
            asf->packet_time_start += asf->packet_time_delta;
933
            asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
934
            asf->packet_size_left--;
935
            asf->packet_multi_size--;
936
            if (asf->packet_multi_size < asf->packet_obj_size)
937
            {
938
                asf->packet_time_start = 0;
939
                avio_skip(pb, asf->packet_multi_size);
940
                asf->packet_size_left -= asf->packet_multi_size;
941
                continue;
942
            }
943
            asf->packet_multi_size -= asf->packet_obj_size;
944
            //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);
945
        }
946
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
947
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
948
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
949
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
950
                asf_st->frag_offset, asf->packet_frag_size,
951
                asf->packet_obj_size, asf_st->pkt.size);
952
            asf->packet_obj_size= asf_st->pkt.size;
953
        }
954

    
955
        if (   asf_st->pkt.size != asf->packet_obj_size
956
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
957
            if(asf_st->pkt.data){
958
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
959
                asf_st->frag_offset = 0;
960
                av_free_packet(&asf_st->pkt);
961
            }
962
            /* new packet */
963
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
964
            asf_st->seq = asf->packet_seq;
965
            asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
966
            asf_st->pkt.stream_index = asf->stream_index;
967
            asf_st->pkt.pos =
968
            asf_st->packet_pos= asf->packet_pos;
969
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
970
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
971
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
972
            if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
973
                asf->packet_key_frame = 1;
974
            if (asf->packet_key_frame)
975
                asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
976
        }
977

    
978
        /* read data */
979
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
980
        //       s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
981
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
982
        asf->packet_size_left -= asf->packet_frag_size;
983
        if (asf->packet_size_left < 0)
984
            continue;
985

    
986
        if(   asf->packet_frag_offset >= asf_st->pkt.size
987
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
988
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
989
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
990
            continue;
991
        }
992

    
993
        ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
994
                         asf->packet_frag_size);
995
        if (ret != asf->packet_frag_size) {
996
            if (ret < 0 || asf->packet_frag_offset + ret == 0)
997
                return ret < 0 ? ret : AVERROR_EOF;
998
            if (asf_st->ds_span > 1) {
999
                // scrambling, we can either drop it completely or fill the remainder
1000
                // TODO: should we fill the whole packet instead of just the current
1001
                // fragment?
1002
                memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1003
                       asf->packet_frag_size - ret);
1004
                ret = asf->packet_frag_size;
1005
            } else
1006
                // no scrambling, so we can return partial packets
1007
                av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1008
        }
1009
        if (s->key && s->keylen == 20)
1010
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1011
                            ret);
1012
        asf_st->frag_offset += ret;
1013
        /* test if whole packet is read */
1014
        if (asf_st->frag_offset == asf_st->pkt.size) {
1015
            //workaround for macroshit radio DVR-MS files
1016
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
1017
               && asf_st->pkt.size > 100){
1018
                int i;
1019
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
1020
                if(i == asf_st->pkt.size){
1021
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1022
                    asf_st->frag_offset = 0;
1023
                    av_free_packet(&asf_st->pkt);
1024
                    continue;
1025
                }
1026
            }
1027

    
1028
            /* return packet */
1029
            if (asf_st->ds_span > 1) {
1030
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
1031
                    av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
1032
              }else{
1033
                /* packet descrambling */
1034
                uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
1035
                if (newdata) {
1036
                    int offset = 0;
1037
                    memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1038
                    while (offset < asf_st->pkt.size) {
1039
                        int off = offset / asf_st->ds_chunk_size;
1040
                        int row = off / asf_st->ds_span;
1041
                        int col = off % asf_st->ds_span;
1042
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1043
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
1044

    
1045
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1046
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1047
                        memcpy(newdata + offset,
1048
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1049
                               asf_st->ds_chunk_size);
1050
                        offset += asf_st->ds_chunk_size;
1051
                    }
1052
                    av_free(asf_st->pkt.data);
1053
                    asf_st->pkt.data = newdata;
1054
                }
1055
              }
1056
            }
1057
            asf_st->frag_offset = 0;
1058
            *pkt= asf_st->pkt;
1059
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1060
            asf_st->pkt.size = 0;
1061
            asf_st->pkt.data = 0;
1062
            break; // packet completed
1063
        }
1064
    }
1065
    return 0;
1066
}
1067

    
1068
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1069
{
1070
    ASFContext *asf = s->priv_data;
1071

    
1072
    for (;;) {
1073
        int ret;
1074

    
1075
        /* parse cached packets, if any */
1076
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1077
            return ret;
1078
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1079
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
1080
        asf->packet_time_start = 0;
1081
    }
1082

    
1083
    return 0;
1084
}
1085

    
1086
// Added to support seeking after packets have been read
1087
// If information is not reset, read_packet fails due to
1088
// leftover information from previous reads
1089
static void asf_reset_header(AVFormatContext *s)
1090
{
1091
    ASFContext *asf = s->priv_data;
1092
    ASFStream *asf_st;
1093
    int i;
1094

    
1095
    asf->packet_size_left = 0;
1096
    asf->packet_segments = 0;
1097
    asf->packet_flags = 0;
1098
    asf->packet_property = 0;
1099
    asf->packet_timestamp = 0;
1100
    asf->packet_segsizetype = 0;
1101
    asf->packet_segments = 0;
1102
    asf->packet_seq = 0;
1103
    asf->packet_replic_size = 0;
1104
    asf->packet_key_frame = 0;
1105
    asf->packet_padsize = 0;
1106
    asf->packet_frag_offset = 0;
1107
    asf->packet_frag_size = 0;
1108
    asf->packet_frag_timestamp = 0;
1109
    asf->packet_multi_size = 0;
1110
    asf->packet_obj_size = 0;
1111
    asf->packet_time_delta = 0;
1112
    asf->packet_time_start = 0;
1113

    
1114
    for(i=0; i<s->nb_streams; i++){
1115
        asf_st= s->streams[i]->priv_data;
1116
        av_free_packet(&asf_st->pkt);
1117
        asf_st->frag_offset=0;
1118
        asf_st->seq=0;
1119
    }
1120
    asf->asf_st= NULL;
1121
}
1122

    
1123
static int asf_read_close(AVFormatContext *s)
1124
{
1125
    int i;
1126

    
1127
    asf_reset_header(s);
1128
    for(i=0;i<s->nb_streams;i++) {
1129
        AVStream *st = s->streams[i];
1130
        av_free(st->codec->palctrl);
1131
    }
1132
    return 0;
1133
}
1134

    
1135
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1136
{
1137
    AVPacket pkt1, *pkt = &pkt1;
1138
    ASFStream *asf_st;
1139
    int64_t pts;
1140
    int64_t pos= *ppos;
1141
    int i;
1142
    int64_t start_pos[ASF_MAX_STREAMS];
1143

    
1144
    for(i=0; i<s->nb_streams; i++){
1145
        start_pos[i]= pos;
1146
    }
1147

    
1148
    if (s->packet_size > 0)
1149
        pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1150
    *ppos= pos;
1151
    avio_seek(s->pb, pos, SEEK_SET);
1152

    
1153
//printf("asf_read_pts\n");
1154
    asf_reset_header(s);
1155
    for(;;){
1156
        if (av_read_frame(s, pkt) < 0){
1157
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1158
            return AV_NOPTS_VALUE;
1159
        }
1160

    
1161
        pts= pkt->pts;
1162

    
1163
        av_free_packet(pkt);
1164
        if(pkt->flags&AV_PKT_FLAG_KEY){
1165
            i= pkt->stream_index;
1166

    
1167
            asf_st= s->streams[i]->priv_data;
1168

    
1169
//            assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1170
            pos= asf_st->packet_pos;
1171

    
1172
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1173
            start_pos[i]= asf_st->packet_pos + 1;
1174

    
1175
            if(pkt->stream_index == stream_index)
1176
               break;
1177
        }
1178
    }
1179

    
1180
    *ppos= pos;
1181
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1182

    
1183
    return pts;
1184
}
1185

    
1186
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1187
{
1188
    ff_asf_guid g;
1189
    ASFContext *asf = s->priv_data;
1190
    int64_t current_pos= avio_tell(s->pb);
1191
    int i;
1192

    
1193
    avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1194
    ff_get_guid(s->pb, &g);
1195

    
1196
    /* the data object can be followed by other top-level objects,
1197
       skip them until the simple index object is reached */
1198
    while (ff_guidcmp(&g, &index_guid)) {
1199
        int64_t gsize= avio_rl64(s->pb);
1200
        if (gsize < 24 || s->pb->eof_reached) {
1201
            avio_seek(s->pb, current_pos, SEEK_SET);
1202
            return;
1203
        }
1204
        avio_skip(s->pb, gsize-24);
1205
        ff_get_guid(s->pb, &g);
1206
    }
1207

    
1208
    {
1209
        int64_t itime, last_pos=-1;
1210
        int pct, ict;
1211
        int64_t av_unused gsize= avio_rl64(s->pb);
1212
        ff_get_guid(s->pb, &g);
1213
        itime=avio_rl64(s->pb);
1214
        pct=avio_rl32(s->pb);
1215
        ict=avio_rl32(s->pb);
1216
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1217

    
1218
        for (i=0;i<ict;i++){
1219
            int pktnum=avio_rl32(s->pb);
1220
            int pktct =avio_rl16(s->pb);
1221
            int64_t pos      = s->data_offset + s->packet_size*(int64_t)pktnum;
1222
            int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1223

    
1224
            if(pos != last_pos){
1225
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d  pts: %"PRId64"\n", pktnum, pktct, index_pts);
1226
            av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1227
            last_pos=pos;
1228
            }
1229
        }
1230
        asf->index_read= 1;
1231
    }
1232
    avio_seek(s->pb, current_pos, SEEK_SET);
1233
}
1234

    
1235
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1236
{
1237
    ASFContext *asf = s->priv_data;
1238
    AVStream *st = s->streams[stream_index];
1239
    int64_t pos;
1240
    int index;
1241

    
1242
    if (s->packet_size <= 0)
1243
        return -1;
1244

    
1245
    /* Try using the protocol's read_seek if available */
1246
    if(s->pb) {
1247
        int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1248
        if(ret >= 0)
1249
            asf_reset_header(s);
1250
        if (ret != AVERROR(ENOSYS))
1251
            return ret;
1252
    }
1253

    
1254
    if (!asf->index_read)
1255
        asf_build_simple_index(s, stream_index);
1256

    
1257
    if(!(asf->index_read && st->index_entries)){
1258
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1259
            return -1;
1260
    }else{
1261
        index= av_index_search_timestamp(st, pts, flags);
1262
        if(index<0)
1263
            return -1;
1264

    
1265
        /* find the position */
1266
        pos = st->index_entries[index].pos;
1267

    
1268
    // various attempts to find key frame have failed so far
1269
    //    asf_reset_header(s);
1270
    //    avio_seek(s->pb, pos, SEEK_SET);
1271
    //    key_pos = pos;
1272
    //     for(i=0;i<16;i++){
1273
    //         pos = avio_tell(s->pb);
1274
    //         if (av_read_frame(s, &pkt) < 0){
1275
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1276
    //             return -1;
1277
    //         }
1278
    //         asf_st = s->streams[stream_index]->priv_data;
1279
    //         pos += st->parser->frame_offset;
1280
    //
1281
    //         if (pkt.size > b) {
1282
    //             b = pkt.size;
1283
    //             key_pos = pos;
1284
    //         }
1285
    //
1286
    //         av_free_packet(&pkt);
1287
    //     }
1288

    
1289
        /* do the seek */
1290
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1291
        avio_seek(s->pb, pos, SEEK_SET);
1292
    }
1293
    asf_reset_header(s);
1294
    return 0;
1295
}
1296

    
1297
AVInputFormat ff_asf_demuxer = {
1298
    "asf",
1299
    NULL_IF_CONFIG_SMALL("ASF format"),
1300
    sizeof(ASFContext),
1301
    asf_probe,
1302
    asf_read_header,
1303
    asf_read_packet,
1304
    asf_read_close,
1305
    asf_read_seek,
1306
    asf_read_pts,
1307
};