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ffmpeg / libavformat / asfdec.c @ dfd2a005

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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
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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
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
//#define DEBUG
23

    
24
#include "libavutil/common.h"
25
#include "libavutil/avstring.h"
26
#include "libavcodec/mpegaudio.h"
27
#include "avformat.h"
28
#include "riff.h"
29
#include "asf.h"
30
#include "asfcrypt.h"
31
#include "avlanguage.h"
32

    
33
void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
34

    
35
#undef NDEBUG
36
#include <assert.h>
37

    
38
#define ASF_MAX_STREAMS 127
39
#define FRAME_HEADER_SIZE 17
40
// Fix Me! FRAME_HEADER_SIZE may be different.
41

    
42
static const ff_asf_guid index_guid = {
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    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
44
};
45

    
46
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
48
};
49
/**********************************/
50
/* decoding */
51

    
52
int ff_guidcmp(const void *g1, const void *g2)
53
{
54
    return memcmp(g1, g2, sizeof(ff_asf_guid));
55
}
56

    
57
#ifdef DEBUG
58
#define PRINT_IF_GUID(g,cmp) \
59
if (!ff_guidcmp(g, &cmp)) \
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    av_dlog(NULL, "(GUID: %s) ", #cmp)
61

    
62
static void print_guid(const ff_asf_guid *g)
63
{
64
    int i;
65
    PRINT_IF_GUID(g, ff_asf_header);
66
    else PRINT_IF_GUID(g, ff_asf_file_header);
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    else PRINT_IF_GUID(g, ff_asf_stream_header);
68
    else PRINT_IF_GUID(g, ff_asf_audio_stream);
69
    else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
70
    else PRINT_IF_GUID(g, ff_asf_video_stream);
71
    else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
72
    else PRINT_IF_GUID(g, ff_asf_command_stream);
73
    else PRINT_IF_GUID(g, ff_asf_comment_header);
74
    else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
75
    else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
76
    else PRINT_IF_GUID(g, ff_asf_data_header);
77
    else PRINT_IF_GUID(g, index_guid);
78
    else PRINT_IF_GUID(g, ff_asf_head1_guid);
79
    else PRINT_IF_GUID(g, ff_asf_head2_guid);
80
    else PRINT_IF_GUID(g, ff_asf_my_guid);
81
    else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
82
    else PRINT_IF_GUID(g, ff_asf_extended_content_header);
83
    else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
84
    else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
85
    else PRINT_IF_GUID(g, ff_asf_metadata_header);
86
    else PRINT_IF_GUID(g, ff_asf_marker_header);
87
    else PRINT_IF_GUID(g, stream_bitrate_guid);
88
    else PRINT_IF_GUID(g, ff_asf_language_guid);
89
    else
90
        av_dlog(NULL, "(GUID: unknown) ");
91
    for(i=0;i<16;i++)
92
        av_dlog(NULL, " 0x%02x,", (*g)[i]);
93
    av_dlog(NULL, "}\n");
94
}
95
#undef PRINT_IF_GUID
96
#else
97
#define print_guid(g)
98
#endif
99

    
100
void ff_get_guid(ByteIOContext *s, ff_asf_guid *g)
101
{
102
    assert(sizeof(*g) == 16);
103
    get_buffer(s, *g, sizeof(*g));
104
}
105

    
106
static int asf_probe(AVProbeData *pd)
107
{
108
    /* check file header */
109
    if (!ff_guidcmp(pd->buf, &ff_asf_header))
110
        return AVPROBE_SCORE_MAX;
111
    else
112
        return 0;
113
}
114

    
115
static int get_value(ByteIOContext *pb, int type){
116
    switch(type){
117
        case 2: return get_le32(pb);
118
        case 3: return get_le32(pb);
119
        case 4: return get_le64(pb);
120
        case 5: return get_le16(pb);
121
        default:return INT_MIN;
122
    }
123
}
124

    
125
static void get_tag(AVFormatContext *s, const char *key, int type, int len)
126
{
127
    char *value;
128
    int64_t off = url_ftell(s->pb);
129

    
130
    if ((unsigned)len >= (UINT_MAX - 1)/2)
131
        return;
132

    
133
    value = av_malloc(2*len+1);
134
    if (!value)
135
        goto finish;
136

    
137
    if (type == 0) {         // UTF16-LE
138
        avio_get_str16le(s->pb, len, value, 2*len + 1);
139
    } else if (type > 1 && type <= 5) {  // boolean or DWORD or QWORD or WORD
140
        uint64_t num = get_value(s->pb, type);
141
        snprintf(value, len, "%"PRIu64, num);
142
    } else {
143
        av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
144
        goto finish;
145
    }
146
    av_metadata_set2(&s->metadata, key, value, 0);
147
finish:
148
    av_freep(&value);
149
    url_fseek(s->pb, off + len, SEEK_SET);
150
}
151

    
152
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
153
{
154
    ASFContext *asf = s->priv_data;
155
    ff_asf_guid g;
156
    ByteIOContext *pb = s->pb;
157
    AVStream *st;
158
    ASFStream *asf_st;
159
    int size, i;
160
    int64_t gsize;
161
    AVRational dar[128];
162
    uint32_t bitrate[128];
163

    
164
    memset(dar, 0, sizeof(dar));
165
    memset(bitrate, 0, sizeof(bitrate));
166

    
167
    ff_get_guid(pb, &g);
168
    if (ff_guidcmp(&g, &ff_asf_header))
169
        return -1;
170
    get_le64(pb);
171
    get_le32(pb);
172
    get_byte(pb);
173
    get_byte(pb);
174
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
175
    for(;;) {
176
        uint64_t gpos= url_ftell(pb);
177
        int ret;
178
        ff_get_guid(pb, &g);
179
        gsize = get_le64(pb);
180
        av_dlog(s, "%08"PRIx64": ", gpos);
181
        print_guid(&g);
182
        av_dlog(s, "  size=0x%"PRIx64"\n", gsize);
183
        if (!ff_guidcmp(&g, &ff_asf_data_header)) {
184
            asf->data_object_offset = url_ftell(pb);
185
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
186
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
187
                asf->data_object_size = gsize - 24;
188
            } else {
189
                asf->data_object_size = (uint64_t)-1;
190
            }
191
            break;
192
        }
193
        if (gsize < 24)
194
            return -1;
195
        if (!ff_guidcmp(&g, &ff_asf_file_header)) {
196
            ff_get_guid(pb, &asf->hdr.guid);
197
            asf->hdr.file_size          = get_le64(pb);
198
            asf->hdr.create_time        = get_le64(pb);
199
            asf->nb_packets             = get_le64(pb);
200
            asf->hdr.play_time          = get_le64(pb);
201
            asf->hdr.send_time          = get_le64(pb);
202
            asf->hdr.preroll            = get_le32(pb);
203
            asf->hdr.ignore             = get_le32(pb);
204
            asf->hdr.flags              = get_le32(pb);
205
            asf->hdr.min_pktsize        = get_le32(pb);
206
            asf->hdr.max_pktsize        = get_le32(pb);
207
            asf->hdr.max_bitrate        = get_le32(pb);
208
            s->packet_size = asf->hdr.max_pktsize;
209
        } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
210
            enum AVMediaType type;
211
            int type_specific_size, sizeX;
212
            uint64_t total_size;
213
            unsigned int tag1;
214
            int64_t pos1, pos2, start_time;
215
            int test_for_ext_stream_audio, is_dvr_ms_audio=0;
216

    
217
            if (s->nb_streams == ASF_MAX_STREAMS) {
218
                av_log(s, AV_LOG_ERROR, "too many streams\n");
219
                return AVERROR(EINVAL);
220
            }
221

    
222
            pos1 = url_ftell(pb);
223

    
224
            st = av_new_stream(s, 0);
225
            if (!st)
226
                return AVERROR(ENOMEM);
227
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
228
            asf_st = av_mallocz(sizeof(ASFStream));
229
            if (!asf_st)
230
                return AVERROR(ENOMEM);
231
            st->priv_data = asf_st;
232
            start_time = asf->hdr.preroll;
233

    
234
            asf_st->stream_language_index = 128; // invalid stream index means no language info
235

    
236
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
237
                st->duration = asf->hdr.play_time /
238
                    (10000000 / 1000) - start_time;
239
            }
240
            ff_get_guid(pb, &g);
241

    
242
            test_for_ext_stream_audio = 0;
243
            if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
244
                type = AVMEDIA_TYPE_AUDIO;
245
            } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
246
                type = AVMEDIA_TYPE_VIDEO;
247
            } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
248
                type = AVMEDIA_TYPE_VIDEO;
249
                st->codec->codec_id = CODEC_ID_MJPEG;
250
            } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
251
                type = AVMEDIA_TYPE_DATA;
252
            } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
253
                test_for_ext_stream_audio = 1;
254
                type = AVMEDIA_TYPE_UNKNOWN;
255
            } else {
256
                return -1;
257
            }
258
            ff_get_guid(pb, &g);
259
            total_size = get_le64(pb);
260
            type_specific_size = get_le32(pb);
261
            get_le32(pb);
262
            st->id = get_le16(pb) & 0x7f; /* stream id */
263
            // mapping of asf ID to AV stream ID;
264
            asf->asfid2avid[st->id] = s->nb_streams - 1;
265

    
266
            get_le32(pb);
267

    
268
            if (test_for_ext_stream_audio) {
269
                ff_get_guid(pb, &g);
270
                if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
271
                    type = AVMEDIA_TYPE_AUDIO;
272
                    is_dvr_ms_audio=1;
273
                    ff_get_guid(pb, &g);
274
                    get_le32(pb);
275
                    get_le32(pb);
276
                    get_le32(pb);
277
                    ff_get_guid(pb, &g);
278
                    get_le32(pb);
279
                }
280
            }
281

    
282
            st->codec->codec_type = type;
283
            if (type == AVMEDIA_TYPE_AUDIO) {
284
                ff_get_wav_header(pb, st->codec, type_specific_size);
285
                if (is_dvr_ms_audio) {
286
                    // codec_id and codec_tag are unreliable in dvr_ms
287
                    // files. Set them later by probing stream.
288
                    st->codec->codec_id = CODEC_ID_PROBE;
289
                    st->codec->codec_tag = 0;
290
                }
291
                if (st->codec->codec_id == CODEC_ID_AAC) {
292
                    st->need_parsing = AVSTREAM_PARSE_NONE;
293
                } else {
294
                    st->need_parsing = AVSTREAM_PARSE_FULL;
295
                }
296
                /* We have to init the frame size at some point .... */
297
                pos2 = url_ftell(pb);
298
                if (gsize >= (pos2 + 8 - pos1 + 24)) {
299
                    asf_st->ds_span = get_byte(pb);
300
                    asf_st->ds_packet_size = get_le16(pb);
301
                    asf_st->ds_chunk_size = get_le16(pb);
302
                    get_le16(pb); //ds_data_size
303
                    get_byte(pb); //ds_silence_data
304
                }
305
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
306
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
307
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
308
                if (asf_st->ds_span > 1) {
309
                    if (!asf_st->ds_chunk_size
310
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
311
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
312
                        asf_st->ds_span = 0; // disable descrambling
313
                }
314
                switch (st->codec->codec_id) {
315
                case CODEC_ID_MP3:
316
                    st->codec->frame_size = MPA_FRAME_SIZE;
317
                    break;
318
                case CODEC_ID_PCM_S16LE:
319
                case CODEC_ID_PCM_S16BE:
320
                case CODEC_ID_PCM_U16LE:
321
                case CODEC_ID_PCM_U16BE:
322
                case CODEC_ID_PCM_S8:
323
                case CODEC_ID_PCM_U8:
324
                case CODEC_ID_PCM_ALAW:
325
                case CODEC_ID_PCM_MULAW:
326
                    st->codec->frame_size = 1;
327
                    break;
328
                default:
329
                    /* This is probably wrong, but it prevents a crash later */
330
                    st->codec->frame_size = 1;
331
                    break;
332
                }
333
            } else if (type == AVMEDIA_TYPE_VIDEO &&
334
                       gsize - (url_ftell(pb) - pos1 + 24) >= 51) {
335
                get_le32(pb);
336
                get_le32(pb);
337
                get_byte(pb);
338
                size = get_le16(pb); /* size */
339
                sizeX= get_le32(pb); /* size */
340
                st->codec->width = get_le32(pb);
341
                st->codec->height = get_le32(pb);
342
                /* not available for asf */
343
                get_le16(pb); /* panes */
344
                st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
345
                tag1 = get_le32(pb);
346
                url_fskip(pb, 20);
347
//                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
348
                size= sizeX;
349
                if (size > 40) {
350
                    st->codec->extradata_size = size - 40;
351
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
352
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
353
                }
354

    
355
                /* Extract palette from extradata if bpp <= 8 */
356
                /* This code assumes that extradata contains only palette */
357
                /* This is true for all paletted codecs implemented in ffmpeg */
358
                if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
359
                    st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
360
#if HAVE_BIGENDIAN
361
                    for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
362
                        st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
363
#else
364
                    memcpy(st->codec->palctrl->palette, st->codec->extradata,
365
                           FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
366
#endif
367
                    st->codec->palctrl->palette_changed = 1;
368
                }
369

    
370
                st->codec->codec_tag = tag1;
371
                st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
372
                if(tag1 == MKTAG('D', 'V', 'R', ' ')){
373
                    st->need_parsing = AVSTREAM_PARSE_FULL;
374
                    // 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
375
                    st->codec->width  =
376
                    st->codec->height = 0;
377
                    av_freep(&st->codec->extradata);
378
                    st->codec->extradata_size=0;
379
                }
380
                if(st->codec->codec_id == CODEC_ID_H264)
381
                    st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
382
            }
383
            pos2 = url_ftell(pb);
384
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
385
        } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
386
            int len1, len2, len3, len4, len5;
387

    
388
            len1 = get_le16(pb);
389
            len2 = get_le16(pb);
390
            len3 = get_le16(pb);
391
            len4 = get_le16(pb);
392
            len5 = get_le16(pb);
393
            get_tag(s, "title"    , 0, len1);
394
            get_tag(s, "author"   , 0, len2);
395
            get_tag(s, "copyright", 0, len3);
396
            get_tag(s, "comment"  , 0, len4);
397
            url_fskip(pb, len5);
398
        } else if (!ff_guidcmp(&g, &stream_bitrate_guid)) {
399
            int stream_count = get_le16(pb);
400
            int j;
401

    
402
//            av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
403
//            av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
404
            for(j = 0; j < stream_count; j++) {
405
                int flags, bitrate, stream_id;
406

    
407
                flags= get_le16(pb);
408
                bitrate= get_le32(pb);
409
                stream_id= (flags & 0x7f);
410
//                av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
411
                asf->stream_bitrates[stream_id]= bitrate;
412
            }
413
        } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
414
            int j;
415
            int stream_count = get_le16(pb);
416
            for(j = 0; j < stream_count; j++) {
417
                char lang[6];
418
                unsigned int lang_len = get_byte(pb);
419
                if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
420
                    url_fskip(pb, lang_len - ret);
421
                if (j < 128)
422
                    av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
423
            }
424
        } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
425
            int desc_count, i;
426

    
427
            desc_count = get_le16(pb);
428
            for(i=0;i<desc_count;i++) {
429
                    int name_len,value_type,value_len;
430
                    char name[1024];
431

    
432
                    name_len = get_le16(pb);
433
                    if (name_len%2)     // must be even, broken lavf versions wrote len-1
434
                        name_len += 1;
435
                    if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
436
                        url_fskip(pb, name_len - ret);
437
                    value_type = get_le16(pb);
438
                    value_len  = get_le16(pb);
439
                    if (!value_type && value_len%2)
440
                        value_len += 1;
441
                    /**
442
                     * My sample has that stream set to 0 maybe that mean the container.
443
                     * Asf stream count start at 1. I am using 0 to the container value since it's unused
444
                     */
445
                    if (!strcmp(name, "AspectRatioX")){
446
                        dar[0].num= get_value(s->pb, value_type);
447
                    } else if(!strcmp(name, "AspectRatioY")){
448
                        dar[0].den= get_value(s->pb, value_type);
449
                    } else
450
                        get_tag(s, name, value_type, value_len);
451
            }
452
        } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
453
            int n, stream_num, name_len, value_len, value_type, value_num;
454
            n = get_le16(pb);
455

    
456
            for(i=0;i<n;i++) {
457
                char name[1024];
458

    
459
                get_le16(pb); //lang_list_index
460
                stream_num= get_le16(pb);
461
                name_len=   get_le16(pb);
462
                value_type= get_le16(pb);
463
                value_len=  get_le32(pb);
464

    
465
                if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
466
                    url_fskip(pb, name_len - ret);
467
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
468
                value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
469
                url_fskip(pb, value_len - 2);
470

    
471
                if(stream_num<128){
472
                    if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
473
                    else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
474
                }
475
            }
476
        } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
477
            int ext_len, payload_ext_ct, stream_ct;
478
            uint32_t ext_d, leak_rate, stream_num;
479
            unsigned int stream_languageid_index;
480

    
481
            get_le64(pb); // starttime
482
            get_le64(pb); // endtime
483
            leak_rate = get_le32(pb); // leak-datarate
484
            get_le32(pb); // bucket-datasize
485
            get_le32(pb); // init-bucket-fullness
486
            get_le32(pb); // alt-leak-datarate
487
            get_le32(pb); // alt-bucket-datasize
488
            get_le32(pb); // alt-init-bucket-fullness
489
            get_le32(pb); // max-object-size
490
            get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
491
            stream_num = get_le16(pb); // stream-num
492

    
493
            stream_languageid_index = get_le16(pb); // stream-language-id-index
494
            if (stream_num < 128)
495
                asf->streams[stream_num].stream_language_index = stream_languageid_index;
496

    
497
            get_le64(pb); // avg frametime in 100ns units
498
            stream_ct = get_le16(pb); //stream-name-count
499
            payload_ext_ct = get_le16(pb); //payload-extension-system-count
500

    
501
            if (stream_num < 128)
502
                bitrate[stream_num] = leak_rate;
503

    
504
            for (i=0; i<stream_ct; i++){
505
                get_le16(pb);
506
                ext_len = get_le16(pb);
507
                url_fseek(pb, ext_len, SEEK_CUR);
508
            }
509

    
510
            for (i=0; i<payload_ext_ct; i++){
511
                ff_get_guid(pb, &g);
512
                ext_d=get_le16(pb);
513
                ext_len=get_le32(pb);
514
                url_fseek(pb, ext_len, SEEK_CUR);
515
            }
516

    
517
            // there could be a optional stream properties object to follow
518
            // if so the next iteration will pick it up
519
            continue;
520
        } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
521
            int v1, v2;
522
            ff_get_guid(pb, &g);
523
            v1 = get_le32(pb);
524
            v2 = get_le16(pb);
525
            continue;
526
        } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
527
            int i, count, name_len;
528
            char name[1024];
529

    
530
            get_le64(pb);            // reserved 16 bytes
531
            get_le64(pb);            // ...
532
            count = get_le32(pb);    // markers count
533
            get_le16(pb);            // reserved 2 bytes
534
            name_len = get_le16(pb); // name length
535
            for(i=0;i<name_len;i++){
536
                get_byte(pb); // skip the name
537
            }
538

    
539
            for(i=0;i<count;i++){
540
                int64_t pres_time;
541
                int name_len;
542

    
543
                get_le64(pb);             // offset, 8 bytes
544
                pres_time = get_le64(pb); // presentation time
545
                get_le16(pb);             // entry length
546
                get_le32(pb);             // send time
547
                get_le32(pb);             // flags
548
                name_len = get_le32(pb);  // name length
549
                if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
550
                    url_fskip(pb, name_len - ret);
551
                ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
552
            }
553
        } else if (url_feof(pb)) {
554
            return -1;
555
        } else {
556
            if (!s->keylen) {
557
                if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
558
                    av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
559
                } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
560
                    av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
561
                } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
562
                    av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
563
                }
564
            }
565
        }
566
        if(url_ftell(pb) != gpos + gsize)
567
            av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
568
        url_fseek(pb, gpos + gsize, SEEK_SET);
569
    }
570
    ff_get_guid(pb, &g);
571
    get_le64(pb);
572
    get_byte(pb);
573
    get_byte(pb);
574
    if (url_feof(pb))
575
        return -1;
576
    asf->data_offset = url_ftell(pb);
577
    asf->packet_size_left = 0;
578

    
579

    
580
    for(i=0; i<128; i++){
581
        int stream_num= asf->asfid2avid[i];
582
        if(stream_num>=0){
583
            AVStream *st = s->streams[stream_num];
584
            if (!st->codec->bit_rate)
585
                st->codec->bit_rate = bitrate[i];
586
            if (dar[i].num > 0 && dar[i].den > 0){
587
                av_reduce(&st->sample_aspect_ratio.num,
588
                          &st->sample_aspect_ratio.den,
589
                          dar[i].num, dar[i].den, INT_MAX);
590
            } else if ((dar[0].num > 0) && (dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
591
                av_reduce(&st->sample_aspect_ratio.num,
592
                          &st->sample_aspect_ratio.den,
593
                          dar[0].num, dar[0].den, INT_MAX);
594

    
595
//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);
596

    
597
            // copy and convert language codes to the frontend
598
            if (asf->streams[i].stream_language_index < 128) {
599
                const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
600
                if (rfc1766 && strlen(rfc1766) > 1) {
601
                    const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
602
                    const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
603
                    if (iso6392)
604
                        av_metadata_set2(&st->metadata, "language", iso6392, 0);
605
                }
606
            }
607
        }
608
    }
609

    
610
    ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
611

    
612
    return 0;
613
}
614

    
615
#define DO_2BITS(bits, var, defval) \
616
    switch (bits & 3) \
617
    { \
618
    case 3: var = get_le32(pb); rsize += 4; break; \
619
    case 2: var = get_le16(pb); rsize += 2; break; \
620
    case 1: var = get_byte(pb); rsize++; break; \
621
    default: var = defval; break; \
622
    }
623

    
624
/**
625
 * Load a single ASF packet into the demuxer.
626
 * @param s demux context
627
 * @param pb context to read data from
628
 * @return 0 on success, <0 on error
629
 */
630
static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
631
{
632
    ASFContext *asf = s->priv_data;
633
    uint32_t packet_length, padsize;
634
    int rsize = 8;
635
    int c, d, e, off;
636

    
637
    // if we do not know packet size, allow skipping up to 32 kB
638
    off= 32768;
639
    if (s->packet_size > 0)
640
        off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
641

    
642
    c=d=e=-1;
643
    while(off-- > 0){
644
        c=d; d=e;
645
        e= get_byte(pb);
646
        if(c == 0x82 && !d && !e)
647
            break;
648
    }
649

    
650
    if (c != 0x82) {
651
        /**
652
         * This code allows handling of -EAGAIN at packet boundaries (i.e.
653
         * if the packet sync code above triggers -EAGAIN). This does not
654
         * imply complete -EAGAIN handling support at random positions in
655
         * the stream.
656
         */
657
        if (url_ferror(pb) == AVERROR(EAGAIN))
658
            return AVERROR(EAGAIN);
659
        if (!url_feof(pb))
660
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
661
    }
662
    if ((c & 0x8f) == 0x82) {
663
        if (d || e) {
664
            if (!url_feof(pb))
665
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
666
            return -1;
667
        }
668
        c= get_byte(pb);
669
        d= get_byte(pb);
670
        rsize+=3;
671
    }else{
672
        url_fseek(pb, -1, SEEK_CUR); //FIXME
673
    }
674

    
675
    asf->packet_flags    = c;
676
    asf->packet_property = d;
677

    
678
    DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
679
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
680
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
681

    
682
    //the following checks prevent overflows and infinite loops
683
    if(!packet_length || packet_length >= (1U<<29)){
684
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
685
        return -1;
686
    }
687
    if(padsize >= packet_length){
688
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
689
        return -1;
690
    }
691

    
692
    asf->packet_timestamp = get_le32(pb);
693
    get_le16(pb); /* duration */
694
    // rsize has at least 11 bytes which have to be present
695

    
696
    if (asf->packet_flags & 0x01) {
697
        asf->packet_segsizetype = get_byte(pb); rsize++;
698
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
699
    } else {
700
        asf->packet_segments = 1;
701
        asf->packet_segsizetype = 0x80;
702
    }
703
    asf->packet_size_left = packet_length - padsize - rsize;
704
    if (packet_length < asf->hdr.min_pktsize)
705
        padsize += asf->hdr.min_pktsize - packet_length;
706
    asf->packet_padsize = padsize;
707
    av_dlog(s, "packet: size=%d padsize=%d  left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
708
    return 0;
709
}
710

    
711
/**
712
 *
713
 * @return <0 if error
714
 */
715
static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
716
    ASFContext *asf = s->priv_data;
717
    int rsize = 1;
718
    int num = get_byte(pb);
719
    int64_t ts0, ts1;
720

    
721
    asf->packet_segments--;
722
    asf->packet_key_frame = num >> 7;
723
    asf->stream_index = asf->asfid2avid[num & 0x7f];
724
    // sequence should be ignored!
725
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
726
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
727
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
728
//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);
729
    if (asf->packet_replic_size >= 8) {
730
        asf->packet_obj_size = get_le32(pb);
731
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
732
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
733
            return -1;
734
        }
735
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
736
        if(asf->packet_replic_size >= 8+38+4){
737
//            for(i=0; i<asf->packet_replic_size-8; i++)
738
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
739
//            av_log(s, AV_LOG_DEBUG, "\n");
740
            url_fskip(pb, 10);
741
            ts0= get_le64(pb);
742
            ts1= get_le64(pb);
743
            url_fskip(pb, 12);
744
            get_le32(pb);
745
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
746
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
747
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
748
        }else
749
            url_fskip(pb, asf->packet_replic_size - 8);
750
        rsize += asf->packet_replic_size; // FIXME - check validity
751
    } else if (asf->packet_replic_size==1){
752
        // multipacket - frag_offset is beginning timestamp
753
        asf->packet_time_start = asf->packet_frag_offset;
754
        asf->packet_frag_offset = 0;
755
        asf->packet_frag_timestamp = asf->packet_timestamp;
756

    
757
        asf->packet_time_delta = get_byte(pb);
758
        rsize++;
759
    }else if(asf->packet_replic_size!=0){
760
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
761
        return -1;
762
    }
763
    if (asf->packet_flags & 0x01) {
764
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
765
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
766
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
767
            return -1;
768
        }
769
        //printf("Fragsize %d\n", asf->packet_frag_size);
770
    } else {
771
        asf->packet_frag_size = asf->packet_size_left - rsize;
772
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
773
    }
774
    if (asf->packet_replic_size == 1) {
775
        asf->packet_multi_size = asf->packet_frag_size;
776
        if (asf->packet_multi_size > asf->packet_size_left)
777
            return -1;
778
    }
779
    asf->packet_size_left -= rsize;
780
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
781

    
782
    return 0;
783
}
784

    
785
/**
786
 * Parse data from individual ASF packets (which were previously loaded
787
 * with asf_get_packet()).
788
 * @param s demux context
789
 * @param pb context to read data from
790
 * @param pkt pointer to store packet data into
791
 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
792
 *          packets need to be loaded (through asf_get_packet())
793
 */
794
static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
795
{
796
    ASFContext *asf = s->priv_data;
797
    ASFStream *asf_st = 0;
798
    for (;;) {
799
        int ret;
800
        if(url_feof(pb))
801
            return AVERROR_EOF;
802
        if (asf->packet_size_left < FRAME_HEADER_SIZE
803
            || asf->packet_segments < 1) {
804
            //asf->packet_size_left <= asf->packet_padsize) {
805
            int ret = asf->packet_size_left + asf->packet_padsize;
806
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
807
            assert(ret>=0);
808
            /* fail safe */
809
            url_fskip(pb, ret);
810

    
811
            asf->packet_pos= url_ftell(pb);
812
            if (asf->data_object_size != (uint64_t)-1 &&
813
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
814
                return AVERROR_EOF; /* Do not exceed the size of the data object */
815
            return 1;
816
        }
817
        if (asf->packet_time_start == 0) {
818
            if(asf_read_frame_header(s, pb) < 0){
819
                asf->packet_segments= 0;
820
                continue;
821
            }
822
            if (asf->stream_index < 0
823
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
824
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
825
                ) {
826
                asf->packet_time_start = 0;
827
                /* unhandled packet (should not happen) */
828
                url_fskip(pb, asf->packet_frag_size);
829
                asf->packet_size_left -= asf->packet_frag_size;
830
                if(asf->stream_index < 0)
831
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
832
                continue;
833
            }
834
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
835
        }
836
        asf_st = asf->asf_st;
837

    
838
        if (asf->packet_replic_size == 1) {
839
            // frag_offset is here used as the beginning timestamp
840
            asf->packet_frag_timestamp = asf->packet_time_start;
841
            asf->packet_time_start += asf->packet_time_delta;
842
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
843
            asf->packet_size_left--;
844
            asf->packet_multi_size--;
845
            if (asf->packet_multi_size < asf->packet_obj_size)
846
            {
847
                asf->packet_time_start = 0;
848
                url_fskip(pb, asf->packet_multi_size);
849
                asf->packet_size_left -= asf->packet_multi_size;
850
                continue;
851
            }
852
            asf->packet_multi_size -= asf->packet_obj_size;
853
            //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);
854
        }
855
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
856
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
857
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
858
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
859
                asf_st->frag_offset, asf->packet_frag_size,
860
                asf->packet_obj_size, asf_st->pkt.size);
861
            asf->packet_obj_size= asf_st->pkt.size;
862
        }
863

    
864
        if (   asf_st->pkt.size != asf->packet_obj_size
865
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
866
            if(asf_st->pkt.data){
867
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
868
                asf_st->frag_offset = 0;
869
                av_free_packet(&asf_st->pkt);
870
            }
871
            /* new packet */
872
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
873
            asf_st->seq = asf->packet_seq;
874
            asf_st->pkt.dts = asf->packet_frag_timestamp;
875
            asf_st->pkt.stream_index = asf->stream_index;
876
            asf_st->pkt.pos =
877
            asf_st->packet_pos= asf->packet_pos;
878
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
879
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
880
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
881
            if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
882
                asf->packet_key_frame = 1;
883
            if (asf->packet_key_frame)
884
                asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
885
        }
886

    
887
        /* read data */
888
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
889
        //       s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
890
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
891
        asf->packet_size_left -= asf->packet_frag_size;
892
        if (asf->packet_size_left < 0)
893
            continue;
894

    
895
        if(   asf->packet_frag_offset >= asf_st->pkt.size
896
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
897
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
898
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
899
            continue;
900
        }
901

    
902
        ret = get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
903
                         asf->packet_frag_size);
904
        if (ret != asf->packet_frag_size) {
905
            if (ret < 0 || asf->packet_frag_offset + ret == 0)
906
                return ret < 0 ? ret : AVERROR_EOF;
907
            if (asf_st->ds_span > 1) {
908
                // scrambling, we can either drop it completely or fill the remainder
909
                // TODO: should we fill the whole packet instead of just the current
910
                // fragment?
911
                memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
912
                       asf->packet_frag_size - ret);
913
                ret = asf->packet_frag_size;
914
            } else
915
                // no scrambling, so we can return partial packets
916
                av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
917
        }
918
        if (s->key && s->keylen == 20)
919
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
920
                            ret);
921
        asf_st->frag_offset += ret;
922
        /* test if whole packet is read */
923
        if (asf_st->frag_offset == asf_st->pkt.size) {
924
            //workaround for macroshit radio DVR-MS files
925
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
926
               && asf_st->pkt.size > 100){
927
                int i;
928
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
929
                if(i == asf_st->pkt.size){
930
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
931
                    asf_st->frag_offset = 0;
932
                    av_free_packet(&asf_st->pkt);
933
                    continue;
934
                }
935
            }
936

    
937
            /* return packet */
938
            if (asf_st->ds_span > 1) {
939
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
940
                    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);
941
              }else{
942
                /* packet descrambling */
943
                uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
944
                if (newdata) {
945
                    int offset = 0;
946
                    memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
947
                    while (offset < asf_st->pkt.size) {
948
                        int off = offset / asf_st->ds_chunk_size;
949
                        int row = off / asf_st->ds_span;
950
                        int col = off % asf_st->ds_span;
951
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
952
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
953

    
954
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
955
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
956
                        memcpy(newdata + offset,
957
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
958
                               asf_st->ds_chunk_size);
959
                        offset += asf_st->ds_chunk_size;
960
                    }
961
                    av_free(asf_st->pkt.data);
962
                    asf_st->pkt.data = newdata;
963
                }
964
              }
965
            }
966
            asf_st->frag_offset = 0;
967
            *pkt= asf_st->pkt;
968
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
969
            asf_st->pkt.size = 0;
970
            asf_st->pkt.data = 0;
971
            break; // packet completed
972
        }
973
    }
974
    return 0;
975
}
976

    
977
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
978
{
979
    ASFContext *asf = s->priv_data;
980

    
981
    for (;;) {
982
        int ret;
983

    
984
        /* parse cached packets, if any */
985
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
986
            return ret;
987
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
988
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
989
        asf->packet_time_start = 0;
990
    }
991

    
992
    return 0;
993
}
994

    
995
// Added to support seeking after packets have been read
996
// If information is not reset, read_packet fails due to
997
// leftover information from previous reads
998
static void asf_reset_header(AVFormatContext *s)
999
{
1000
    ASFContext *asf = s->priv_data;
1001
    ASFStream *asf_st;
1002
    int i;
1003

    
1004
    asf->packet_nb_frames = 0;
1005
    asf->packet_size_left = 0;
1006
    asf->packet_segments = 0;
1007
    asf->packet_flags = 0;
1008
    asf->packet_property = 0;
1009
    asf->packet_timestamp = 0;
1010
    asf->packet_segsizetype = 0;
1011
    asf->packet_segments = 0;
1012
    asf->packet_seq = 0;
1013
    asf->packet_replic_size = 0;
1014
    asf->packet_key_frame = 0;
1015
    asf->packet_padsize = 0;
1016
    asf->packet_frag_offset = 0;
1017
    asf->packet_frag_size = 0;
1018
    asf->packet_frag_timestamp = 0;
1019
    asf->packet_multi_size = 0;
1020
    asf->packet_obj_size = 0;
1021
    asf->packet_time_delta = 0;
1022
    asf->packet_time_start = 0;
1023

    
1024
    for(i=0; i<s->nb_streams; i++){
1025
        asf_st= s->streams[i]->priv_data;
1026
        av_free_packet(&asf_st->pkt);
1027
        asf_st->frag_offset=0;
1028
        asf_st->seq=0;
1029
    }
1030
    asf->asf_st= NULL;
1031
}
1032

    
1033
static int asf_read_close(AVFormatContext *s)
1034
{
1035
    int i;
1036

    
1037
    asf_reset_header(s);
1038
    for(i=0;i<s->nb_streams;i++) {
1039
        AVStream *st = s->streams[i];
1040
        av_free(st->codec->palctrl);
1041
    }
1042
    return 0;
1043
}
1044

    
1045
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1046
{
1047
    AVPacket pkt1, *pkt = &pkt1;
1048
    ASFStream *asf_st;
1049
    int64_t pts;
1050
    int64_t pos= *ppos;
1051
    int i;
1052
    int64_t start_pos[ASF_MAX_STREAMS];
1053

    
1054
    for(i=0; i<s->nb_streams; i++){
1055
        start_pos[i]= pos;
1056
    }
1057

    
1058
    if (s->packet_size > 0)
1059
        pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1060
    *ppos= pos;
1061
    url_fseek(s->pb, pos, SEEK_SET);
1062

    
1063
//printf("asf_read_pts\n");
1064
    asf_reset_header(s);
1065
    for(;;){
1066
        if (av_read_frame(s, pkt) < 0){
1067
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1068
            return AV_NOPTS_VALUE;
1069
        }
1070

    
1071
        pts= pkt->pts;
1072

    
1073
        av_free_packet(pkt);
1074
        if(pkt->flags&AV_PKT_FLAG_KEY){
1075
            i= pkt->stream_index;
1076

    
1077
            asf_st= s->streams[i]->priv_data;
1078

    
1079
//            assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1080
            pos= asf_st->packet_pos;
1081

    
1082
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1083
            start_pos[i]= asf_st->packet_pos + 1;
1084

    
1085
            if(pkt->stream_index == stream_index)
1086
               break;
1087
        }
1088
    }
1089

    
1090
    *ppos= pos;
1091
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1092

    
1093
    return pts;
1094
}
1095

    
1096
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1097
{
1098
    ff_asf_guid g;
1099
    ASFContext *asf = s->priv_data;
1100
    int64_t current_pos= url_ftell(s->pb);
1101
    int i;
1102

    
1103
    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1104
    ff_get_guid(s->pb, &g);
1105

    
1106
    /* the data object can be followed by other top-level objects,
1107
       skip them until the simple index object is reached */
1108
    while (ff_guidcmp(&g, &index_guid)) {
1109
        int64_t gsize= get_le64(s->pb);
1110
        if (gsize < 24 || url_feof(s->pb)) {
1111
            url_fseek(s->pb, current_pos, SEEK_SET);
1112
            return;
1113
        }
1114
        url_fseek(s->pb, gsize-24, SEEK_CUR);
1115
        ff_get_guid(s->pb, &g);
1116
    }
1117

    
1118
    {
1119
        int64_t itime, last_pos=-1;
1120
        int pct, ict;
1121
        int64_t av_unused gsize= get_le64(s->pb);
1122
        ff_get_guid(s->pb, &g);
1123
        itime=get_le64(s->pb);
1124
        pct=get_le32(s->pb);
1125
        ict=get_le32(s->pb);
1126
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1127

    
1128
        for (i=0;i<ict;i++){
1129
            int pktnum=get_le32(s->pb);
1130
            int pktct =get_le16(s->pb);
1131
            int64_t pos      = s->data_offset + s->packet_size*(int64_t)pktnum;
1132
            int64_t index_pts= av_rescale(itime, i, 10000);
1133

    
1134
            if(pos != last_pos){
1135
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1136
            av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1137
            last_pos=pos;
1138
            }
1139
        }
1140
        asf->index_read= 1;
1141
    }
1142
    url_fseek(s->pb, current_pos, SEEK_SET);
1143
}
1144

    
1145
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1146
{
1147
    ASFContext *asf = s->priv_data;
1148
    AVStream *st = s->streams[stream_index];
1149
    int64_t pos;
1150
    int index;
1151

    
1152
    if (s->packet_size <= 0)
1153
        return -1;
1154

    
1155
    /* Try using the protocol's read_seek if available */
1156
    if(s->pb) {
1157
        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1158
        if(ret >= 0)
1159
            asf_reset_header(s);
1160
        if (ret != AVERROR(ENOSYS))
1161
            return ret;
1162
    }
1163

    
1164
    if (!asf->index_read)
1165
        asf_build_simple_index(s, stream_index);
1166

    
1167
    if(!(asf->index_read && st->index_entries)){
1168
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1169
            return -1;
1170
    }else{
1171
        index= av_index_search_timestamp(st, pts, flags);
1172
        if(index<0)
1173
            return -1;
1174

    
1175
        /* find the position */
1176
        pos = st->index_entries[index].pos;
1177

    
1178
    // various attempts to find key frame have failed so far
1179
    //    asf_reset_header(s);
1180
    //    url_fseek(s->pb, pos, SEEK_SET);
1181
    //    key_pos = pos;
1182
    //     for(i=0;i<16;i++){
1183
    //         pos = url_ftell(s->pb);
1184
    //         if (av_read_frame(s, &pkt) < 0){
1185
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1186
    //             return -1;
1187
    //         }
1188
    //         asf_st = s->streams[stream_index]->priv_data;
1189
    //         pos += st->parser->frame_offset;
1190
    //
1191
    //         if (pkt.size > b) {
1192
    //             b = pkt.size;
1193
    //             key_pos = pos;
1194
    //         }
1195
    //
1196
    //         av_free_packet(&pkt);
1197
    //     }
1198

    
1199
        /* do the seek */
1200
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1201
        url_fseek(s->pb, pos, SEEK_SET);
1202
    }
1203
    asf_reset_header(s);
1204
    return 0;
1205
}
1206

    
1207
AVInputFormat ff_asf_demuxer = {
1208
    "asf",
1209
    NULL_IF_CONFIG_SMALL("ASF format"),
1210
    sizeof(ASFContext),
1211
    asf_probe,
1212
    asf_read_header,
1213
    asf_read_packet,
1214
    asf_read_close,
1215
    asf_read_seek,
1216
    asf_read_pts,
1217
};