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ffmpeg / libavformat / asfdec.c @ 1d4c1c3b

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1
/*
2
 * ASF compatible demuxer
3
 * Copyright (c) 2000, 2001 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
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 *
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 * 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
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * 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.
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 *
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 * 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

    
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#include "libavutil/common.h"
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#include "libavutil/avstring.h"
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#include "libavcodec/mpegaudio.h"
27
#include "avformat.h"
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#include "riff.h"
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#include "asf.h"
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#include "asfcrypt.h"
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#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 FRAME_HEADER_SIZE 17
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// Fix Me! FRAME_HEADER_SIZE may be different.
40

    
41
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
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};
44

    
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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
47
};
48
/**********************************/
49
/* decoding */
50

    
51
static int guidcmp(const void *g1, const void *g2)
52
{
53
    return memcmp(g1, g2, sizeof(ff_asf_guid));
54
}
55

    
56
#ifdef DEBUG
57
#define PRINT_IF_GUID(g,cmp) \
58
if (!guidcmp(g, &cmp)) \
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    dprintf(NULL, "(GUID: %s) ", #cmp)
60

    
61
static void print_guid(const ff_asf_guid *g)
62
{
63
    int i;
64
    PRINT_IF_GUID(g, ff_asf_header);
65
    else PRINT_IF_GUID(g, ff_asf_file_header);
66
    else PRINT_IF_GUID(g, ff_asf_stream_header);
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    else PRINT_IF_GUID(g, ff_asf_audio_stream);
68
    else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
69
    else PRINT_IF_GUID(g, ff_asf_video_stream);
70
    else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
71
    else PRINT_IF_GUID(g, ff_asf_command_stream);
72
    else PRINT_IF_GUID(g, ff_asf_comment_header);
73
    else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
74
    else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
75
    else PRINT_IF_GUID(g, ff_asf_data_header);
76
    else PRINT_IF_GUID(g, index_guid);
77
    else PRINT_IF_GUID(g, ff_asf_head1_guid);
78
    else PRINT_IF_GUID(g, ff_asf_head2_guid);
79
    else PRINT_IF_GUID(g, ff_asf_my_guid);
80
    else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
81
    else PRINT_IF_GUID(g, ff_asf_extended_content_header);
82
    else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
83
    else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
84
    else PRINT_IF_GUID(g, ff_asf_metadata_header);
85
    else PRINT_IF_GUID(g, ff_asf_marker_header);
86
    else PRINT_IF_GUID(g, stream_bitrate_guid);
87
    else PRINT_IF_GUID(g, ff_asf_language_guid);
88
    else
89
        dprintf(NULL, "(GUID: unknown) ");
90
    for(i=0;i<16;i++)
91
        dprintf(NULL, " 0x%02x,", (*g)[i]);
92
    dprintf(NULL, "}\n");
93
}
94
#undef PRINT_IF_GUID
95
#else
96
#define print_guid(g)
97
#endif
98

    
99
static void get_guid(ByteIOContext *s, ff_asf_guid *g)
100
{
101
    assert(sizeof(*g) == 16);
102
    get_buffer(s, *g, sizeof(*g));
103
}
104

    
105
#if 0
106
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
107
{
108
    int len, c;
109
    char *q;
110

111
    len = get_le16(pb);
112
    q = buf;
113
    while (len > 0) {
114
        c = get_le16(pb);
115
        if ((q - buf) < buf_size - 1)
116
            *q++ = c;
117
        len--;
118
    }
119
    *q = '\0';
120
}
121
#endif
122

    
123
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
124
{
125
    char* q = buf;
126
    while (len > 1) {
127
        uint8_t tmp;
128
        uint32_t ch;
129

    
130
        GET_UTF16(ch, (len -= 2) >= 0 ? get_le16(pb) : 0, break;)
131
        PUT_UTF8(ch, tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
132
    }
133
    if (len > 0)
134
        url_fskip(pb, len);
135
    *q = '\0';
136
}
137

    
138
static int asf_probe(AVProbeData *pd)
139
{
140
    /* check file header */
141
    if (!guidcmp(pd->buf, &ff_asf_header))
142
        return AVPROBE_SCORE_MAX;
143
    else
144
        return 0;
145
}
146

    
147
static int get_value(ByteIOContext *pb, int type){
148
    switch(type){
149
        case 2: return get_le32(pb);
150
        case 3: return get_le32(pb);
151
        case 4: return get_le64(pb);
152
        case 5: return get_le16(pb);
153
        default:return INT_MIN;
154
    }
155
}
156

    
157
static void get_tag(AVFormatContext *s, const char *key, int type, int len)
158
{
159
    char *value;
160

    
161
    if ((unsigned)len >= (UINT_MAX - 1)/2)
162
        return;
163

    
164
    value = av_malloc(2*len+1);
165
    if (!value)
166
        return;
167

    
168
    if (type == 0) {         // UTF16-LE
169
        get_str16_nolen(s->pb, len, value, 2*len + 1);
170
    } else if (type > 1 && type <= 5) {  // boolean or DWORD or QWORD or WORD
171
        uint64_t num = get_value(s->pb, type);
172
        snprintf(value, len, "%"PRIu64, num);
173
    } else {
174
        url_fskip(s->pb, len);
175
        av_freep(&value);
176
        av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
177
        return;
178
    }
179
    av_metadata_set2(&s->metadata, key, value, 0);
180
    av_freep(&value);
181
}
182

    
183
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
184
{
185
    ASFContext *asf = s->priv_data;
186
    ff_asf_guid g;
187
    ByteIOContext *pb = s->pb;
188
    AVStream *st;
189
    ASFStream *asf_st;
190
    int size, i;
191
    int64_t gsize;
192
    AVRational dar[128];
193
    uint32_t bitrate[128];
194

    
195
    memset(dar, 0, sizeof(dar));
196
    memset(bitrate, 0, sizeof(bitrate));
197

    
198
    get_guid(pb, &g);
199
    if (guidcmp(&g, &ff_asf_header))
200
        return -1;
201
    get_le64(pb);
202
    get_le32(pb);
203
    get_byte(pb);
204
    get_byte(pb);
205
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
206
    for(;;) {
207
        uint64_t gpos= url_ftell(pb);
208
        get_guid(pb, &g);
209
        gsize = get_le64(pb);
210
        dprintf(s, "%08"PRIx64": ", gpos);
211
        print_guid(&g);
212
        dprintf(s, "  size=0x%"PRIx64"\n", gsize);
213
        if (!guidcmp(&g, &ff_asf_data_header)) {
214
            asf->data_object_offset = url_ftell(pb);
215
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
216
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
217
                asf->data_object_size = gsize - 24;
218
            } else {
219
                asf->data_object_size = (uint64_t)-1;
220
            }
221
            break;
222
        }
223
        if (gsize < 24)
224
            return -1;
225
        if (!guidcmp(&g, &ff_asf_file_header)) {
226
            get_guid(pb, &asf->hdr.guid);
227
            asf->hdr.file_size          = get_le64(pb);
228
            asf->hdr.create_time        = get_le64(pb);
229
            asf->nb_packets             = get_le64(pb);
230
            asf->hdr.play_time          = get_le64(pb);
231
            asf->hdr.send_time          = get_le64(pb);
232
            asf->hdr.preroll            = get_le32(pb);
233
            asf->hdr.ignore             = get_le32(pb);
234
            asf->hdr.flags              = get_le32(pb);
235
            asf->hdr.min_pktsize        = get_le32(pb);
236
            asf->hdr.max_pktsize        = get_le32(pb);
237
            asf->hdr.max_bitrate        = get_le32(pb);
238
            s->packet_size = asf->hdr.max_pktsize;
239
        } else if (!guidcmp(&g, &ff_asf_stream_header)) {
240
            enum AVMediaType type;
241
            int type_specific_size, sizeX;
242
            uint64_t total_size;
243
            unsigned int tag1;
244
            int64_t pos1, pos2, start_time;
245
            int test_for_ext_stream_audio, is_dvr_ms_audio=0;
246

    
247
            pos1 = url_ftell(pb);
248

    
249
            st = av_new_stream(s, 0);
250
            if (!st)
251
                return AVERROR(ENOMEM);
252
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
253
            asf_st = av_mallocz(sizeof(ASFStream));
254
            if (!asf_st)
255
                return AVERROR(ENOMEM);
256
            st->priv_data = asf_st;
257
            start_time = asf->hdr.preroll;
258

    
259
            asf_st->stream_language_index = 128; // invalid stream index means no language info
260

    
261
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
262
                st->duration = asf->hdr.play_time /
263
                    (10000000 / 1000) - start_time;
264
            }
265
            get_guid(pb, &g);
266

    
267
            test_for_ext_stream_audio = 0;
268
            if (!guidcmp(&g, &ff_asf_audio_stream)) {
269
                type = AVMEDIA_TYPE_AUDIO;
270
            } else if (!guidcmp(&g, &ff_asf_video_stream)) {
271
                type = AVMEDIA_TYPE_VIDEO;
272
            } else if (!guidcmp(&g, &ff_asf_command_stream)) {
273
                type = AVMEDIA_TYPE_DATA;
274
            } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
275
                test_for_ext_stream_audio = 1;
276
                type = AVMEDIA_TYPE_UNKNOWN;
277
            } else {
278
                return -1;
279
            }
280
            get_guid(pb, &g);
281
            total_size = get_le64(pb);
282
            type_specific_size = get_le32(pb);
283
            get_le32(pb);
284
            st->id = get_le16(pb) & 0x7f; /* stream id */
285
            // mapping of asf ID to AV stream ID;
286
            asf->asfid2avid[st->id] = s->nb_streams - 1;
287

    
288
            get_le32(pb);
289

    
290
            if (test_for_ext_stream_audio) {
291
                get_guid(pb, &g);
292
                if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
293
                    type = AVMEDIA_TYPE_AUDIO;
294
                    is_dvr_ms_audio=1;
295
                    get_guid(pb, &g);
296
                    get_le32(pb);
297
                    get_le32(pb);
298
                    get_le32(pb);
299
                    get_guid(pb, &g);
300
                    get_le32(pb);
301
                }
302
            }
303

    
304
            st->codec->codec_type = type;
305
            if (type == AVMEDIA_TYPE_AUDIO) {
306
                ff_get_wav_header(pb, st->codec, type_specific_size);
307
                if (is_dvr_ms_audio) {
308
                    // codec_id and codec_tag are unreliable in dvr_ms
309
                    // files. Set them later by probing stream.
310
                    st->codec->codec_id = CODEC_ID_PROBE;
311
                    st->codec->codec_tag = 0;
312
                }
313
                if (st->codec->codec_id == CODEC_ID_AAC) {
314
                    st->need_parsing = AVSTREAM_PARSE_NONE;
315
                } else {
316
                    st->need_parsing = AVSTREAM_PARSE_FULL;
317
                }
318
                /* We have to init the frame size at some point .... */
319
                pos2 = url_ftell(pb);
320
                if (gsize >= (pos2 + 8 - pos1 + 24)) {
321
                    asf_st->ds_span = get_byte(pb);
322
                    asf_st->ds_packet_size = get_le16(pb);
323
                    asf_st->ds_chunk_size = get_le16(pb);
324
                    get_le16(pb); //ds_data_size
325
                    get_byte(pb); //ds_silence_data
326
                }
327
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
328
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
329
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
330
                if (asf_st->ds_span > 1) {
331
                    if (!asf_st->ds_chunk_size
332
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
333
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
334
                        asf_st->ds_span = 0; // disable descrambling
335
                }
336
                switch (st->codec->codec_id) {
337
                case CODEC_ID_MP3:
338
                    st->codec->frame_size = MPA_FRAME_SIZE;
339
                    break;
340
                case CODEC_ID_PCM_S16LE:
341
                case CODEC_ID_PCM_S16BE:
342
                case CODEC_ID_PCM_U16LE:
343
                case CODEC_ID_PCM_U16BE:
344
                case CODEC_ID_PCM_S8:
345
                case CODEC_ID_PCM_U8:
346
                case CODEC_ID_PCM_ALAW:
347
                case CODEC_ID_PCM_MULAW:
348
                    st->codec->frame_size = 1;
349
                    break;
350
                default:
351
                    /* This is probably wrong, but it prevents a crash later */
352
                    st->codec->frame_size = 1;
353
                    break;
354
                }
355
            } else if (type == AVMEDIA_TYPE_VIDEO) {
356
                get_le32(pb);
357
                get_le32(pb);
358
                get_byte(pb);
359
                size = get_le16(pb); /* size */
360
                sizeX= get_le32(pb); /* size */
361
                st->codec->width = get_le32(pb);
362
                st->codec->height = get_le32(pb);
363
                /* not available for asf */
364
                get_le16(pb); /* panes */
365
                st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
366
                tag1 = get_le32(pb);
367
                url_fskip(pb, 20);
368
//                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
369
                size= sizeX;
370
                if (size > 40) {
371
                    st->codec->extradata_size = size - 40;
372
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
373
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
374
                }
375

    
376
                /* Extract palette from extradata if bpp <= 8 */
377
                /* This code assumes that extradata contains only palette */
378
                /* This is true for all paletted codecs implemented in ffmpeg */
379
                if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
380
                    st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
381
#if HAVE_BIGENDIAN
382
                    for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
383
                        st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
384
#else
385
                    memcpy(st->codec->palctrl->palette, st->codec->extradata,
386
                           FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
387
#endif
388
                    st->codec->palctrl->palette_changed = 1;
389
                }
390

    
391
                st->codec->codec_tag = tag1;
392
                st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
393
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
394
                    st->need_parsing = AVSTREAM_PARSE_FULL;
395
                if(st->codec->codec_id == CODEC_ID_H264)
396
                    st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
397
            }
398
            pos2 = url_ftell(pb);
399
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
400
        } else if (!guidcmp(&g, &ff_asf_comment_header)) {
401
            int len1, len2, len3, len4, len5;
402

    
403
            len1 = get_le16(pb);
404
            len2 = get_le16(pb);
405
            len3 = get_le16(pb);
406
            len4 = get_le16(pb);
407
            len5 = get_le16(pb);
408
            get_tag(s, "title"    , 0, len1);
409
            get_tag(s, "author"   , 0, len2);
410
            get_tag(s, "copyright", 0, len3);
411
            get_tag(s, "comment"  , 0, len4);
412
            url_fskip(pb, len5);
413
        } else if (!guidcmp(&g, &stream_bitrate_guid)) {
414
            int stream_count = get_le16(pb);
415
            int j;
416

    
417
//            av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
418
//            av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
419
            for(j = 0; j < stream_count; j++) {
420
                int flags, bitrate, stream_id;
421

    
422
                flags= get_le16(pb);
423
                bitrate= get_le32(pb);
424
                stream_id= (flags & 0x7f);
425
//                av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
426
                asf->stream_bitrates[stream_id]= bitrate;
427
            }
428
        } else if (!guidcmp(&g, &ff_asf_language_guid)) {
429
            int j;
430
            int stream_count = get_le16(pb);
431
            for(j = 0; j < stream_count; j++) {
432
                char lang[6];
433
                unsigned int lang_len = get_byte(pb);
434
                get_str16_nolen(pb, lang_len, lang, sizeof(lang));
435
                if (j < 128)
436
                    av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
437
            }
438
        } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
439
            int desc_count, i;
440

    
441
            desc_count = get_le16(pb);
442
            for(i=0;i<desc_count;i++) {
443
                    int name_len,value_type,value_len;
444
                    char name[1024];
445

    
446
                    name_len = get_le16(pb);
447
                    if (name_len%2)     // must be even, broken lavf versions wrote len-1
448
                        name_len += 1;
449
                    get_str16_nolen(pb, name_len, name, sizeof(name));
450
                    value_type = get_le16(pb);
451
                    value_len  = get_le16(pb);
452
                    if (!value_type && value_len%2)
453
                        value_len += 1;
454
                    get_tag(s, name, value_type, value_len);
455
            }
456
        } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
457
            int n, stream_num, name_len, value_len, value_type, value_num;
458
            n = get_le16(pb);
459

    
460
            for(i=0;i<n;i++) {
461
                char name[1024];
462

    
463
                get_le16(pb); //lang_list_index
464
                stream_num= get_le16(pb);
465
                name_len=   get_le16(pb);
466
                value_type= get_le16(pb);
467
                value_len=  get_le32(pb);
468

    
469
                get_str16_nolen(pb, name_len, name, sizeof(name));
470
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
471
                value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
472
                url_fskip(pb, value_len - 2);
473

    
474
                if(stream_num<128){
475
                    if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
476
                    else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
477
                }
478
            }
479
        } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
480
            int ext_len, payload_ext_ct, stream_ct;
481
            uint32_t ext_d, leak_rate, stream_num;
482
            unsigned int stream_languageid_index;
483

    
484
            get_le64(pb); // starttime
485
            get_le64(pb); // endtime
486
            leak_rate = get_le32(pb); // leak-datarate
487
            get_le32(pb); // bucket-datasize
488
            get_le32(pb); // init-bucket-fullness
489
            get_le32(pb); // alt-leak-datarate
490
            get_le32(pb); // alt-bucket-datasize
491
            get_le32(pb); // alt-init-bucket-fullness
492
            get_le32(pb); // max-object-size
493
            get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
494
            stream_num = get_le16(pb); // stream-num
495

    
496
            stream_languageid_index = get_le16(pb); // stream-language-id-index
497
            if (stream_num < 128)
498
                asf->streams[stream_num].stream_language_index = stream_languageid_index;
499

    
500
            get_le64(pb); // avg frametime in 100ns units
501
            stream_ct = get_le16(pb); //stream-name-count
502
            payload_ext_ct = get_le16(pb); //payload-extension-system-count
503

    
504
            if (stream_num < 128)
505
                bitrate[stream_num] = leak_rate;
506

    
507
            for (i=0; i<stream_ct; i++){
508
                get_le16(pb);
509
                ext_len = get_le16(pb);
510
                url_fseek(pb, ext_len, SEEK_CUR);
511
            }
512

    
513
            for (i=0; i<payload_ext_ct; i++){
514
                get_guid(pb, &g);
515
                ext_d=get_le16(pb);
516
                ext_len=get_le32(pb);
517
                url_fseek(pb, ext_len, SEEK_CUR);
518
            }
519

    
520
            // there could be a optional stream properties object to follow
521
            // if so the next iteration will pick it up
522
            continue;
523
        } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
524
            int v1, v2;
525
            get_guid(pb, &g);
526
            v1 = get_le32(pb);
527
            v2 = get_le16(pb);
528
            continue;
529
        } else if (!guidcmp(&g, &ff_asf_marker_header)) {
530
            int i, count, name_len;
531
            char name[1024];
532

    
533
            get_le64(pb);            // reserved 16 bytes
534
            get_le64(pb);            // ...
535
            count = get_le32(pb);    // markers count
536
            get_le16(pb);            // reserved 2 bytes
537
            name_len = get_le16(pb); // name length
538
            for(i=0;i<name_len;i++){
539
                get_byte(pb); // skip the name
540
            }
541

    
542
            for(i=0;i<count;i++){
543
                int64_t pres_time;
544
                int name_len;
545

    
546
                get_le64(pb);             // offset, 8 bytes
547
                pres_time = get_le64(pb); // presentation time
548
                get_le16(pb);             // entry length
549
                get_le32(pb);             // send time
550
                get_le32(pb);             // flags
551
                name_len = get_le32(pb);  // name length
552
                get_str16_nolen(pb, name_len * 2, name, sizeof(name));
553
                ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
554
            }
555
#if 0
556
        } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
557
            int len, v1, n, num;
558
            char str[256], *q;
559
            char tag[16];
560

561
            get_guid(pb, &g);
562
            print_guid(&g);
563

564
            n = get_le32(pb);
565
            for(i=0;i<n;i++) {
566
                num = get_le16(pb); /* stream number */
567
                get_str16(pb, str, sizeof(str));
568
                get_str16(pb, str, sizeof(str));
569
                len = get_le16(pb);
570
                q = tag;
571
                while (len > 0) {
572
                    v1 = get_byte(pb);
573
                    if ((q - tag) < sizeof(tag) - 1)
574
                        *q++ = v1;
575
                    len--;
576
                }
577
                *q = '\0';
578
            }
579
#endif
580
        } else if (url_feof(pb)) {
581
            return -1;
582
        } else {
583
            if (!s->keylen) {
584
                if (!guidcmp(&g, &ff_asf_content_encryption)) {
585
                    av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
586
                } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) {
587
                    av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
588
                } else if (!guidcmp(&g, &ff_asf_digital_signature)) {
589
                    av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
590
                }
591
            }
592
        }
593
        if(url_ftell(pb) != gpos + gsize)
594
            av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
595
        url_fseek(pb, gpos + gsize, SEEK_SET);
596
    }
597
    get_guid(pb, &g);
598
    get_le64(pb);
599
    get_byte(pb);
600
    get_byte(pb);
601
    if (url_feof(pb))
602
        return -1;
603
    asf->data_offset = url_ftell(pb);
604
    asf->packet_size_left = 0;
605

    
606

    
607
    for(i=0; i<128; i++){
608
        int stream_num= asf->asfid2avid[i];
609
        if(stream_num>=0){
610
            AVStream *st = s->streams[stream_num];
611
            if (!st->codec->bit_rate)
612
                st->codec->bit_rate = bitrate[i];
613
            if (dar[i].num > 0 && dar[i].den > 0)
614
                av_reduce(&st->sample_aspect_ratio.num,
615
                          &st->sample_aspect_ratio.den,
616
                          dar[i].num, dar[i].den, INT_MAX);
617
//av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
618

    
619
            // copy and convert language codes to the frontend
620
            if (asf->streams[i].stream_language_index < 128) {
621
                const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
622
                if (rfc1766 && strlen(rfc1766) > 1) {
623
                    const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
624
                    const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
625
                    if (iso6392)
626
                        av_metadata_set2(&st->metadata, "language", iso6392, 0);
627
                }
628
            }
629
        }
630
    }
631

    
632
    return 0;
633
}
634

    
635
#define DO_2BITS(bits, var, defval) \
636
    switch (bits & 3) \
637
    { \
638
    case 3: var = get_le32(pb); rsize += 4; break; \
639
    case 2: var = get_le16(pb); rsize += 2; break; \
640
    case 1: var = get_byte(pb); rsize++; break; \
641
    default: var = defval; break; \
642
    }
643

    
644
/**
645
 * Load a single ASF packet into the demuxer.
646
 * @param s demux context
647
 * @param pb context to read data from
648
 * @return 0 on success, <0 on error
649
 */
650
static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
651
{
652
    ASFContext *asf = s->priv_data;
653
    uint32_t packet_length, padsize;
654
    int rsize = 8;
655
    int c, d, e, off;
656

    
657
    // if we do not know packet size, allow skipping up to 32 kB
658
    off= 32768;
659
    if (s->packet_size > 0)
660
        off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
661

    
662
    c=d=e=-1;
663
    while(off-- > 0){
664
        c=d; d=e;
665
        e= get_byte(pb);
666
        if(c == 0x82 && !d && !e)
667
            break;
668
    }
669

    
670
    if (c != 0x82) {
671
        /**
672
         * This code allows handling of -EAGAIN at packet boundaries (i.e.
673
         * if the packet sync code above triggers -EAGAIN). This does not
674
         * imply complete -EAGAIN handling support at random positions in
675
         * the stream.
676
         */
677
        if (url_ferror(pb) == AVERROR(EAGAIN))
678
            return AVERROR(EAGAIN);
679
        if (!url_feof(pb))
680
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
681
    }
682
    if ((c & 0x8f) == 0x82) {
683
        if (d || e) {
684
            if (!url_feof(pb))
685
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
686
            return -1;
687
        }
688
        c= get_byte(pb);
689
        d= get_byte(pb);
690
        rsize+=3;
691
    }else{
692
        url_fseek(pb, -1, SEEK_CUR); //FIXME
693
    }
694

    
695
    asf->packet_flags    = c;
696
    asf->packet_property = d;
697

    
698
    DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
699
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
700
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
701

    
702
    //the following checks prevent overflows and infinite loops
703
    if(!packet_length || packet_length >= (1U<<29)){
704
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
705
        return -1;
706
    }
707
    if(padsize >= packet_length){
708
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
709
        return -1;
710
    }
711

    
712
    asf->packet_timestamp = get_le32(pb);
713
    get_le16(pb); /* duration */
714
    // rsize has at least 11 bytes which have to be present
715

    
716
    if (asf->packet_flags & 0x01) {
717
        asf->packet_segsizetype = get_byte(pb); rsize++;
718
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
719
    } else {
720
        asf->packet_segments = 1;
721
        asf->packet_segsizetype = 0x80;
722
    }
723
    asf->packet_size_left = packet_length - padsize - rsize;
724
    if (packet_length < asf->hdr.min_pktsize)
725
        padsize += asf->hdr.min_pktsize - packet_length;
726
    asf->packet_padsize = padsize;
727
    dprintf(s, "packet: size=%d padsize=%d  left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
728
    return 0;
729
}
730

    
731
/**
732
 *
733
 * @return <0 if error
734
 */
735
static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
736
    ASFContext *asf = s->priv_data;
737
    int rsize = 1;
738
    int num = get_byte(pb);
739
    int64_t ts0, ts1;
740

    
741
    asf->packet_segments--;
742
    asf->packet_key_frame = num >> 7;
743
    asf->stream_index = asf->asfid2avid[num & 0x7f];
744
    // sequence should be ignored!
745
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
746
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
747
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
748
//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);
749
    if (asf->packet_replic_size >= 8) {
750
        asf->packet_obj_size = get_le32(pb);
751
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
752
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
753
            return -1;
754
        }
755
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
756
        if(asf->packet_replic_size >= 8+38+4){
757
//            for(i=0; i<asf->packet_replic_size-8; i++)
758
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
759
//            av_log(s, AV_LOG_DEBUG, "\n");
760
            url_fskip(pb, 10);
761
            ts0= get_le64(pb);
762
            ts1= get_le64(pb);
763
            url_fskip(pb, 12);
764
            get_le32(pb);
765
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
766
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
767
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
768
        }else
769
            url_fskip(pb, asf->packet_replic_size - 8);
770
        rsize += asf->packet_replic_size; // FIXME - check validity
771
    } else if (asf->packet_replic_size==1){
772
        // multipacket - frag_offset is beginning timestamp
773
        asf->packet_time_start = asf->packet_frag_offset;
774
        asf->packet_frag_offset = 0;
775
        asf->packet_frag_timestamp = asf->packet_timestamp;
776

    
777
        asf->packet_time_delta = get_byte(pb);
778
        rsize++;
779
    }else if(asf->packet_replic_size!=0){
780
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
781
        return -1;
782
    }
783
    if (asf->packet_flags & 0x01) {
784
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
785
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
786
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
787
            return -1;
788
        }
789
        //printf("Fragsize %d\n", asf->packet_frag_size);
790
    } else {
791
        asf->packet_frag_size = asf->packet_size_left - rsize;
792
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
793
    }
794
    if (asf->packet_replic_size == 1) {
795
        asf->packet_multi_size = asf->packet_frag_size;
796
        if (asf->packet_multi_size > asf->packet_size_left)
797
            return -1;
798
    }
799
    asf->packet_size_left -= rsize;
800
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
801

    
802
    return 0;
803
}
804

    
805
/**
806
 * Parse data from individual ASF packets (which were previously loaded
807
 * with asf_get_packet()).
808
 * @param s demux context
809
 * @param pb context to read data from
810
 * @param pkt pointer to store packet data into
811
 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
812
 *          packets need to be loaded (through asf_get_packet())
813
 */
814
static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
815
{
816
    ASFContext *asf = s->priv_data;
817
    ASFStream *asf_st = 0;
818
    for (;;) {
819
        if(url_feof(pb))
820
            return AVERROR_EOF;
821
        if (asf->packet_size_left < FRAME_HEADER_SIZE
822
            || asf->packet_segments < 1) {
823
            //asf->packet_size_left <= asf->packet_padsize) {
824
            int ret = asf->packet_size_left + asf->packet_padsize;
825
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
826
            assert(ret>=0);
827
            /* fail safe */
828
            url_fskip(pb, ret);
829

    
830
            asf->packet_pos= url_ftell(pb);
831
            if (asf->data_object_size != (uint64_t)-1 &&
832
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
833
                return AVERROR_EOF; /* Do not exceed the size of the data object */
834
            return 1;
835
        }
836
        if (asf->packet_time_start == 0) {
837
            if(asf_read_frame_header(s, pb) < 0){
838
                asf->packet_segments= 0;
839
                continue;
840
            }
841
            if (asf->stream_index < 0
842
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
843
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
844
                ) {
845
                asf->packet_time_start = 0;
846
                /* unhandled packet (should not happen) */
847
                url_fskip(pb, asf->packet_frag_size);
848
                asf->packet_size_left -= asf->packet_frag_size;
849
                if(asf->stream_index < 0)
850
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
851
                continue;
852
            }
853
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
854
        }
855
        asf_st = asf->asf_st;
856

    
857
        if (asf->packet_replic_size == 1) {
858
            // frag_offset is here used as the beginning timestamp
859
            asf->packet_frag_timestamp = asf->packet_time_start;
860
            asf->packet_time_start += asf->packet_time_delta;
861
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
862
            asf->packet_size_left--;
863
            asf->packet_multi_size--;
864
            if (asf->packet_multi_size < asf->packet_obj_size)
865
            {
866
                asf->packet_time_start = 0;
867
                url_fskip(pb, asf->packet_multi_size);
868
                asf->packet_size_left -= asf->packet_multi_size;
869
                continue;
870
            }
871
            asf->packet_multi_size -= asf->packet_obj_size;
872
            //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);
873
        }
874
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
875
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
876
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
877
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
878
                asf_st->frag_offset, asf->packet_frag_size,
879
                asf->packet_obj_size, asf_st->pkt.size);
880
            asf->packet_obj_size= asf_st->pkt.size;
881
        }
882

    
883
        if (   asf_st->pkt.size != asf->packet_obj_size
884
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
885
            if(asf_st->pkt.data){
886
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
887
                asf_st->frag_offset = 0;
888
                av_free_packet(&asf_st->pkt);
889
            }
890
            /* new packet */
891
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
892
            asf_st->seq = asf->packet_seq;
893
            asf_st->pkt.dts = asf->packet_frag_timestamp;
894
            asf_st->pkt.stream_index = asf->stream_index;
895
            asf_st->pkt.pos =
896
            asf_st->packet_pos= asf->packet_pos;
897
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
898
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
899
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
900
            if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
901
                asf->packet_key_frame = 1;
902
            if (asf->packet_key_frame)
903
                asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
904
        }
905

    
906
        /* read data */
907
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
908
        //       s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
909
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
910
        asf->packet_size_left -= asf->packet_frag_size;
911
        if (asf->packet_size_left < 0)
912
            continue;
913

    
914
        if(   asf->packet_frag_offset >= asf_st->pkt.size
915
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
916
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
917
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
918
            continue;
919
        }
920

    
921
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
922
                   asf->packet_frag_size);
923
        if (s->key && s->keylen == 20)
924
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
925
                            asf->packet_frag_size);
926
        asf_st->frag_offset += asf->packet_frag_size;
927
        /* test if whole packet is read */
928
        if (asf_st->frag_offset == asf_st->pkt.size) {
929
            //workaround for macroshit radio DVR-MS files
930
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
931
               && asf_st->pkt.size > 100){
932
                int i;
933
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
934
                if(i == asf_st->pkt.size){
935
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
936
                    asf_st->frag_offset = 0;
937
                    av_free_packet(&asf_st->pkt);
938
                    continue;
939
                }
940
            }
941

    
942
            /* return packet */
943
            if (asf_st->ds_span > 1) {
944
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
945
                    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);
946
              }else{
947
                /* packet descrambling */
948
                uint8_t *newdata = av_malloc(asf_st->pkt.size);
949
                if (newdata) {
950
                    int offset = 0;
951
                    while (offset < asf_st->pkt.size) {
952
                        int off = offset / asf_st->ds_chunk_size;
953
                        int row = off / asf_st->ds_span;
954
                        int col = off % asf_st->ds_span;
955
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
956
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
957

    
958
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
959
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
960
                        memcpy(newdata + offset,
961
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
962
                               asf_st->ds_chunk_size);
963
                        offset += asf_st->ds_chunk_size;
964
                    }
965
                    av_free(asf_st->pkt.data);
966
                    asf_st->pkt.data = newdata;
967
                }
968
              }
969
            }
970
            asf_st->frag_offset = 0;
971
            *pkt= asf_st->pkt;
972
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
973
            asf_st->pkt.size = 0;
974
            asf_st->pkt.data = 0;
975
            break; // packet completed
976
        }
977
    }
978
    return 0;
979
}
980

    
981
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
982
{
983
    ASFContext *asf = s->priv_data;
984

    
985
    for (;;) {
986
        int ret;
987

    
988
        /* parse cached packets, if any */
989
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
990
            return ret;
991
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
992
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
993
        asf->packet_time_start = 0;
994
    }
995

    
996
    return 0;
997
}
998

    
999
// Added to support seeking after packets have been read
1000
// If information is not reset, read_packet fails due to
1001
// leftover information from previous reads
1002
static void asf_reset_header(AVFormatContext *s)
1003
{
1004
    ASFContext *asf = s->priv_data;
1005
    ASFStream *asf_st;
1006
    int i;
1007

    
1008
    asf->packet_nb_frames = 0;
1009
    asf->packet_size_left = 0;
1010
    asf->packet_segments = 0;
1011
    asf->packet_flags = 0;
1012
    asf->packet_property = 0;
1013
    asf->packet_timestamp = 0;
1014
    asf->packet_segsizetype = 0;
1015
    asf->packet_segments = 0;
1016
    asf->packet_seq = 0;
1017
    asf->packet_replic_size = 0;
1018
    asf->packet_key_frame = 0;
1019
    asf->packet_padsize = 0;
1020
    asf->packet_frag_offset = 0;
1021
    asf->packet_frag_size = 0;
1022
    asf->packet_frag_timestamp = 0;
1023
    asf->packet_multi_size = 0;
1024
    asf->packet_obj_size = 0;
1025
    asf->packet_time_delta = 0;
1026
    asf->packet_time_start = 0;
1027

    
1028
    for(i=0; i<s->nb_streams; i++){
1029
        asf_st= s->streams[i]->priv_data;
1030
        av_free_packet(&asf_st->pkt);
1031
        asf_st->frag_offset=0;
1032
        asf_st->seq=0;
1033
    }
1034
    asf->asf_st= NULL;
1035
}
1036

    
1037
static int asf_read_close(AVFormatContext *s)
1038
{
1039
    int i;
1040

    
1041
    asf_reset_header(s);
1042
    for(i=0;i<s->nb_streams;i++) {
1043
        AVStream *st = s->streams[i];
1044
        av_free(st->codec->palctrl);
1045
    }
1046
    return 0;
1047
}
1048

    
1049
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1050
{
1051
    AVPacket pkt1, *pkt = &pkt1;
1052
    ASFStream *asf_st;
1053
    int64_t pts;
1054
    int64_t pos= *ppos;
1055
    int i;
1056
    int64_t start_pos[s->nb_streams];
1057

    
1058
    for(i=0; i<s->nb_streams; i++){
1059
        start_pos[i]= pos;
1060
    }
1061

    
1062
    if (s->packet_size > 0)
1063
        pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1064
    *ppos= pos;
1065
    url_fseek(s->pb, pos, SEEK_SET);
1066

    
1067
//printf("asf_read_pts\n");
1068
    asf_reset_header(s);
1069
    for(;;){
1070
        if (av_read_frame(s, pkt) < 0){
1071
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1072
            return AV_NOPTS_VALUE;
1073
        }
1074

    
1075
        pts= pkt->pts;
1076

    
1077
        av_free_packet(pkt);
1078
        if(pkt->flags&AV_PKT_FLAG_KEY){
1079
            i= pkt->stream_index;
1080

    
1081
            asf_st= s->streams[i]->priv_data;
1082

    
1083
//            assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1084
            pos= asf_st->packet_pos;
1085

    
1086
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1087
            start_pos[i]= asf_st->packet_pos + 1;
1088

    
1089
            if(pkt->stream_index == stream_index)
1090
               break;
1091
        }
1092
    }
1093

    
1094
    *ppos= pos;
1095
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1096

    
1097
    return pts;
1098
}
1099

    
1100
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1101
{
1102
    ff_asf_guid g;
1103
    ASFContext *asf = s->priv_data;
1104
    int64_t current_pos= url_ftell(s->pb);
1105
    int i;
1106

    
1107
    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1108
    get_guid(s->pb, &g);
1109
    if (!guidcmp(&g, &index_guid)) {
1110
        int64_t itime, last_pos=-1;
1111
        int pct, ict;
1112
        int64_t av_unused gsize= get_le64(s->pb);
1113
        get_guid(s->pb, &g);
1114
        itime=get_le64(s->pb);
1115
        pct=get_le32(s->pb);
1116
        ict=get_le32(s->pb);
1117
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1118

    
1119
        for (i=0;i<ict;i++){
1120
            int pktnum=get_le32(s->pb);
1121
            int pktct =get_le16(s->pb);
1122
            int64_t pos      = s->data_offset + s->packet_size*(int64_t)pktnum;
1123
            int64_t index_pts= av_rescale(itime, i, 10000);
1124

    
1125
            if(pos != last_pos){
1126
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1127
            av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1128
            last_pos=pos;
1129
            }
1130
        }
1131
        asf->index_read= 1;
1132
    }
1133
    url_fseek(s->pb, current_pos, SEEK_SET);
1134
}
1135

    
1136
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1137
{
1138
    ASFContext *asf = s->priv_data;
1139
    AVStream *st = s->streams[stream_index];
1140
    int64_t pos;
1141
    int index;
1142

    
1143
    if (s->packet_size <= 0)
1144
        return -1;
1145

    
1146
    /* Try using the protocol's read_seek if available */
1147
    if(s->pb) {
1148
        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1149
        if(ret >= 0)
1150
            asf_reset_header(s);
1151
        if (ret != AVERROR(ENOSYS))
1152
            return ret;
1153
    }
1154

    
1155
    if (!asf->index_read)
1156
        asf_build_simple_index(s, stream_index);
1157

    
1158
    if(!(asf->index_read && st->index_entries)){
1159
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1160
            return -1;
1161
    }else{
1162
        index= av_index_search_timestamp(st, pts, flags);
1163
        if(index<0)
1164
            return -1;
1165

    
1166
        /* find the position */
1167
        pos = st->index_entries[index].pos;
1168

    
1169
    // various attempts to find key frame have failed so far
1170
    //    asf_reset_header(s);
1171
    //    url_fseek(s->pb, pos, SEEK_SET);
1172
    //    key_pos = pos;
1173
    //     for(i=0;i<16;i++){
1174
    //         pos = url_ftell(s->pb);
1175
    //         if (av_read_frame(s, &pkt) < 0){
1176
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1177
    //             return -1;
1178
    //         }
1179
    //         asf_st = s->streams[stream_index]->priv_data;
1180
    //         pos += st->parser->frame_offset;
1181
    //
1182
    //         if (pkt.size > b) {
1183
    //             b = pkt.size;
1184
    //             key_pos = pos;
1185
    //         }
1186
    //
1187
    //         av_free_packet(&pkt);
1188
    //     }
1189

    
1190
        /* do the seek */
1191
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1192
        url_fseek(s->pb, pos, SEEK_SET);
1193
    }
1194
    asf_reset_header(s);
1195
    return 0;
1196
}
1197

    
1198
AVInputFormat asf_demuxer = {
1199
    "asf",
1200
    NULL_IF_CONFIG_SMALL("ASF format"),
1201
    sizeof(ASFContext),
1202
    asf_probe,
1203
    asf_read_header,
1204
    asf_read_packet,
1205
    asf_read_close,
1206
    asf_read_seek,
1207
    asf_read_pts,
1208
    .metadata_conv = ff_asf_metadata_conv,
1209
};