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ffmpeg / libavformat / asfdec.c @ 72415b2a

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

    
246
            pos1 = url_ftell(pb);
247

    
248
            st = av_new_stream(s, 0);
249
            if (!st)
250
                return AVERROR(ENOMEM);
251
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
252
            asf_st = av_mallocz(sizeof(ASFStream));
253
            if (!asf_st)
254
                return AVERROR(ENOMEM);
255
            st->priv_data = asf_st;
256
            start_time = asf->hdr.preroll;
257

    
258
            asf_st->stream_language_index = 128; // invalid stream index means no language info
259

    
260
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
261
                st->duration = asf->hdr.play_time /
262
                    (10000000 / 1000) - start_time;
263
            }
264
            get_guid(pb, &g);
265

    
266
            test_for_ext_stream_audio = 0;
267
            if (!guidcmp(&g, &ff_asf_audio_stream)) {
268
                type = AVMEDIA_TYPE_AUDIO;
269
            } else if (!guidcmp(&g, &ff_asf_video_stream)) {
270
                type = AVMEDIA_TYPE_VIDEO;
271
            } else if (!guidcmp(&g, &ff_asf_command_stream)) {
272
                type = AVMEDIA_TYPE_DATA;
273
            } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
274
                test_for_ext_stream_audio = 1;
275
                type = AVMEDIA_TYPE_UNKNOWN;
276
            } else {
277
                return -1;
278
            }
279
            get_guid(pb, &g);
280
            total_size = get_le64(pb);
281
            type_specific_size = get_le32(pb);
282
            get_le32(pb);
283
            st->id = get_le16(pb) & 0x7f; /* stream id */
284
            // mapping of asf ID to AV stream ID;
285
            asf->asfid2avid[st->id] = s->nb_streams - 1;
286

    
287
            get_le32(pb);
288

    
289
            if (test_for_ext_stream_audio) {
290
                get_guid(pb, &g);
291
                if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
292
                    type = AVMEDIA_TYPE_AUDIO;
293
                    is_dvr_ms_audio=1;
294
                    get_guid(pb, &g);
295
                    get_le32(pb);
296
                    get_le32(pb);
297
                    get_le32(pb);
298
                    get_guid(pb, &g);
299
                    get_le32(pb);
300
                }
301
            }
302

    
303
            st->codec->codec_type = type;
304
            if (type == AVMEDIA_TYPE_AUDIO) {
305
                ff_get_wav_header(pb, st->codec, type_specific_size);
306
                if (is_dvr_ms_audio) {
307
                    // codec_id and codec_tag are unreliable in dvr_ms
308
                    // files. Set them later by probing stream.
309
                    st->codec->codec_id = CODEC_ID_PROBE;
310
                    st->codec->codec_tag = 0;
311
                }
312
                if (st->codec->codec_id == CODEC_ID_AAC) {
313
                    st->need_parsing = AVSTREAM_PARSE_NONE;
314
                } else {
315
                    st->need_parsing = AVSTREAM_PARSE_FULL;
316
                }
317
                /* We have to init the frame size at some point .... */
318
                pos2 = url_ftell(pb);
319
                if (gsize >= (pos2 + 8 - pos1 + 24)) {
320
                    asf_st->ds_span = get_byte(pb);
321
                    asf_st->ds_packet_size = get_le16(pb);
322
                    asf_st->ds_chunk_size = get_le16(pb);
323
                    get_le16(pb); //ds_data_size
324
                    get_byte(pb); //ds_silence_data
325
                }
326
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
327
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
328
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
329
                if (asf_st->ds_span > 1) {
330
                    if (!asf_st->ds_chunk_size
331
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
332
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
333
                        asf_st->ds_span = 0; // disable descrambling
334
                }
335
                switch (st->codec->codec_id) {
336
                case CODEC_ID_MP3:
337
                    st->codec->frame_size = MPA_FRAME_SIZE;
338
                    break;
339
                case CODEC_ID_PCM_S16LE:
340
                case CODEC_ID_PCM_S16BE:
341
                case CODEC_ID_PCM_U16LE:
342
                case CODEC_ID_PCM_U16BE:
343
                case CODEC_ID_PCM_S8:
344
                case CODEC_ID_PCM_U8:
345
                case CODEC_ID_PCM_ALAW:
346
                case CODEC_ID_PCM_MULAW:
347
                    st->codec->frame_size = 1;
348
                    break;
349
                default:
350
                    /* This is probably wrong, but it prevents a crash later */
351
                    st->codec->frame_size = 1;
352
                    break;
353
                }
354
            } else if (type == AVMEDIA_TYPE_VIDEO) {
355
                get_le32(pb);
356
                get_le32(pb);
357
                get_byte(pb);
358
                size = get_le16(pb); /* size */
359
                sizeX= get_le32(pb); /* size */
360
                st->codec->width = get_le32(pb);
361
                st->codec->height = get_le32(pb);
362
                /* not available for asf */
363
                get_le16(pb); /* panes */
364
                st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
365
                tag1 = get_le32(pb);
366
                url_fskip(pb, 20);
367
//                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
368
                size= sizeX;
369
                if (size > 40) {
370
                    st->codec->extradata_size = size - 40;
371
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
372
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
373
                }
374

    
375
                /* Extract palette from extradata if bpp <= 8 */
376
                /* This code assumes that extradata contains only palette */
377
                /* This is true for all paletted codecs implemented in ffmpeg */
378
                if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
379
                    st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
380
#if HAVE_BIGENDIAN
381
                    for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
382
                        st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
383
#else
384
                    memcpy(st->codec->palctrl->palette, st->codec->extradata,
385
                           FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
386
#endif
387
                    st->codec->palctrl->palette_changed = 1;
388
                }
389

    
390
                st->codec->codec_tag = tag1;
391
                st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
392
                if(tag1 == MKTAG('D', 'V', 'R', ' '))
393
                    st->need_parsing = AVSTREAM_PARSE_FULL;
394
            }
395
            pos2 = url_ftell(pb);
396
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
397
        } else if (!guidcmp(&g, &ff_asf_comment_header)) {
398
            int len1, len2, len3, len4, len5;
399

    
400
            len1 = get_le16(pb);
401
            len2 = get_le16(pb);
402
            len3 = get_le16(pb);
403
            len4 = get_le16(pb);
404
            len5 = get_le16(pb);
405
            get_tag(s, "title"    , 0, len1);
406
            get_tag(s, "author"   , 0, len2);
407
            get_tag(s, "copyright", 0, len3);
408
            get_tag(s, "comment"  , 0, len4);
409
            url_fskip(pb, len5);
410
        } else if (!guidcmp(&g, &stream_bitrate_guid)) {
411
            int stream_count = get_le16(pb);
412
            int j;
413

    
414
//            av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
415
//            av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
416
            for(j = 0; j < stream_count; j++) {
417
                int flags, bitrate, stream_id;
418

    
419
                flags= get_le16(pb);
420
                bitrate= get_le32(pb);
421
                stream_id= (flags & 0x7f);
422
//                av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
423
                asf->stream_bitrates[stream_id]= bitrate;
424
            }
425
        } else if (!guidcmp(&g, &ff_asf_language_guid)) {
426
            int j;
427
            int stream_count = get_le16(pb);
428
            for(j = 0; j < stream_count; j++) {
429
                char lang[6];
430
                unsigned int lang_len = get_byte(pb);
431
                get_str16_nolen(pb, lang_len, lang, sizeof(lang));
432
                if (j < 128)
433
                    av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
434
            }
435
        } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
436
            int desc_count, i;
437

    
438
            desc_count = get_le16(pb);
439
            for(i=0;i<desc_count;i++) {
440
                    int name_len,value_type,value_len;
441
                    char name[1024];
442

    
443
                    name_len = get_le16(pb);
444
                    if (name_len%2)     // must be even, broken lavf versions wrote len-1
445
                        name_len += 1;
446
                    get_str16_nolen(pb, name_len, name, sizeof(name));
447
                    value_type = get_le16(pb);
448
                    value_len  = get_le16(pb);
449
                    if (!value_type && value_len%2)
450
                        value_len += 1;
451
                    get_tag(s, name, value_type, value_len);
452
            }
453
        } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
454
            int n, stream_num, name_len, value_len, value_type, value_num;
455
            n = get_le16(pb);
456

    
457
            for(i=0;i<n;i++) {
458
                char name[1024];
459

    
460
                get_le16(pb); //lang_list_index
461
                stream_num= get_le16(pb);
462
                name_len=   get_le16(pb);
463
                value_type= get_le16(pb);
464
                value_len=  get_le32(pb);
465

    
466
                get_str16_nolen(pb, name_len, name, sizeof(name));
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 (!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
                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
        } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
520
            int v1, v2;
521
            get_guid(pb, &g);
522
            v1 = get_le32(pb);
523
            v2 = get_le16(pb);
524
        } else if (!guidcmp(&g, &ff_asf_marker_header)) {
525
            int i, count, name_len;
526
            char name[1024];
527

    
528
            get_le64(pb);            // reserved 16 bytes
529
            get_le64(pb);            // ...
530
            count = get_le32(pb);    // markers count
531
            get_le16(pb);            // reserved 2 bytes
532
            name_len = get_le16(pb); // name length
533
            for(i=0;i<name_len;i++){
534
                get_byte(pb); // skip the name
535
            }
536

    
537
            for(i=0;i<count;i++){
538
                int64_t pres_time;
539
                int name_len;
540

    
541
                get_le64(pb);             // offset, 8 bytes
542
                pres_time = get_le64(pb); // presentation time
543
                get_le16(pb);             // entry length
544
                get_le32(pb);             // send time
545
                get_le32(pb);             // flags
546
                name_len = get_le32(pb);  // name length
547
                get_str16_nolen(pb, name_len * 2, name, sizeof(name));
548
                ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
549
            }
550
#if 0
551
        } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
552
            int len, v1, n, num;
553
            char str[256], *q;
554
            char tag[16];
555

556
            get_guid(pb, &g);
557
            print_guid(&g);
558

559
            n = get_le32(pb);
560
            for(i=0;i<n;i++) {
561
                num = get_le16(pb); /* stream number */
562
                get_str16(pb, str, sizeof(str));
563
                get_str16(pb, str, sizeof(str));
564
                len = get_le16(pb);
565
                q = tag;
566
                while (len > 0) {
567
                    v1 = get_byte(pb);
568
                    if ((q - tag) < sizeof(tag) - 1)
569
                        *q++ = v1;
570
                    len--;
571
                }
572
                *q = '\0';
573
            }
574
#endif
575
        } else if (url_feof(pb)) {
576
            return -1;
577
        } else {
578
            if (!s->keylen) {
579
                if (!guidcmp(&g, &ff_asf_content_encryption)) {
580
                    av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
581
                } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) {
582
                    av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
583
                } else if (!guidcmp(&g, &ff_asf_digital_signature)) {
584
                    av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
585
                }
586
            }
587
            url_fseek(pb, gsize - 24, SEEK_CUR);
588
        }
589
    }
590
    get_guid(pb, &g);
591
    get_le64(pb);
592
    get_byte(pb);
593
    get_byte(pb);
594
    if (url_feof(pb))
595
        return -1;
596
    asf->data_offset = url_ftell(pb);
597
    asf->packet_size_left = 0;
598

    
599

    
600
    for(i=0; i<128; i++){
601
        int stream_num= asf->asfid2avid[i];
602
        if(stream_num>=0){
603
            AVStream *st = s->streams[stream_num];
604
            if (!st->codec->bit_rate)
605
                st->codec->bit_rate = bitrate[i];
606
            if (dar[i].num > 0 && dar[i].den > 0)
607
                av_reduce(&st->sample_aspect_ratio.num,
608
                          &st->sample_aspect_ratio.den,
609
                          dar[i].num, dar[i].den, INT_MAX);
610
//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);
611

    
612
            // copy and convert language codes to the frontend
613
            if (asf->streams[i].stream_language_index < 128) {
614
                const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
615
                if (rfc1766 && strlen(rfc1766) > 1) {
616
                    const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
617
                    const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
618
                    if (iso6392)
619
                        av_metadata_set(&st->metadata, "language", iso6392);
620
                }
621
            }
622
        }
623
    }
624

    
625
    return 0;
626
}
627

    
628
#define DO_2BITS(bits, var, defval) \
629
    switch (bits & 3) \
630
    { \
631
    case 3: var = get_le32(pb); rsize += 4; break; \
632
    case 2: var = get_le16(pb); rsize += 2; break; \
633
    case 1: var = get_byte(pb); rsize++; break; \
634
    default: var = defval; break; \
635
    }
636

    
637
/**
638
 * Load a single ASF packet into the demuxer.
639
 * @param s demux context
640
 * @param pb context to read data from
641
 * @return 0 on success, <0 on error
642
 */
643
static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
644
{
645
    ASFContext *asf = s->priv_data;
646
    uint32_t packet_length, padsize;
647
    int rsize = 8;
648
    int c, d, e, off;
649

    
650
    // if we do not know packet size, allow skipping up to 32 kB
651
    off= 32768;
652
    if (s->packet_size > 0)
653
        off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
654

    
655
    c=d=e=-1;
656
    while(off-- > 0){
657
        c=d; d=e;
658
        e= get_byte(pb);
659
        if(c == 0x82 && !d && !e)
660
            break;
661
    }
662

    
663
    if (c != 0x82) {
664
        /**
665
         * This code allows handling of -EAGAIN at packet boundaries (i.e.
666
         * if the packet sync code above triggers -EAGAIN). This does not
667
         * imply complete -EAGAIN handling support at random positions in
668
         * the stream.
669
         */
670
        if (url_ferror(pb) == AVERROR(EAGAIN))
671
            return AVERROR(EAGAIN);
672
        if (!url_feof(pb))
673
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
674
    }
675
    if ((c & 0x8f) == 0x82) {
676
        if (d || e) {
677
            if (!url_feof(pb))
678
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
679
            return -1;
680
        }
681
        c= get_byte(pb);
682
        d= get_byte(pb);
683
        rsize+=3;
684
    }else{
685
        url_fseek(pb, -1, SEEK_CUR); //FIXME
686
    }
687

    
688
    asf->packet_flags    = c;
689
    asf->packet_property = d;
690

    
691
    DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
692
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
693
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
694

    
695
    //the following checks prevent overflows and infinite loops
696
    if(!packet_length || packet_length >= (1U<<29)){
697
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
698
        return -1;
699
    }
700
    if(padsize >= packet_length){
701
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
702
        return -1;
703
    }
704

    
705
    asf->packet_timestamp = get_le32(pb);
706
    get_le16(pb); /* duration */
707
    // rsize has at least 11 bytes which have to be present
708

    
709
    if (asf->packet_flags & 0x01) {
710
        asf->packet_segsizetype = get_byte(pb); rsize++;
711
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
712
    } else {
713
        asf->packet_segments = 1;
714
        asf->packet_segsizetype = 0x80;
715
    }
716
    asf->packet_size_left = packet_length - padsize - rsize;
717
    if (packet_length < asf->hdr.min_pktsize)
718
        padsize += asf->hdr.min_pktsize - packet_length;
719
    asf->packet_padsize = padsize;
720
    dprintf(s, "packet: size=%d padsize=%d  left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
721
    return 0;
722
}
723

    
724
/**
725
 *
726
 * @return <0 if error
727
 */
728
static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
729
    ASFContext *asf = s->priv_data;
730
    int rsize = 1;
731
    int num = get_byte(pb);
732
    int64_t ts0, ts1;
733

    
734
    asf->packet_segments--;
735
    asf->packet_key_frame = num >> 7;
736
    asf->stream_index = asf->asfid2avid[num & 0x7f];
737
    // sequence should be ignored!
738
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
739
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
740
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
741
//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);
742
    if (asf->packet_replic_size >= 8) {
743
        asf->packet_obj_size = get_le32(pb);
744
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
745
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
746
            return -1;
747
        }
748
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
749
        if(asf->packet_replic_size >= 8+38+4){
750
//            for(i=0; i<asf->packet_replic_size-8; i++)
751
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
752
//            av_log(s, AV_LOG_DEBUG, "\n");
753
            url_fskip(pb, 10);
754
            ts0= get_le64(pb);
755
            ts1= get_le64(pb);
756
            url_fskip(pb, 12);
757
            get_le32(pb);
758
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
759
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
760
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
761
        }else
762
            url_fskip(pb, asf->packet_replic_size - 8);
763
        rsize += asf->packet_replic_size; // FIXME - check validity
764
    } else if (asf->packet_replic_size==1){
765
        // multipacket - frag_offset is beginning timestamp
766
        asf->packet_time_start = asf->packet_frag_offset;
767
        asf->packet_frag_offset = 0;
768
        asf->packet_frag_timestamp = asf->packet_timestamp;
769

    
770
        asf->packet_time_delta = get_byte(pb);
771
        rsize++;
772
    }else if(asf->packet_replic_size!=0){
773
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
774
        return -1;
775
    }
776
    if (asf->packet_flags & 0x01) {
777
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
778
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
779
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
780
            return -1;
781
        }
782
        //printf("Fragsize %d\n", asf->packet_frag_size);
783
    } else {
784
        asf->packet_frag_size = asf->packet_size_left - rsize;
785
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
786
    }
787
    if (asf->packet_replic_size == 1) {
788
        asf->packet_multi_size = asf->packet_frag_size;
789
        if (asf->packet_multi_size > asf->packet_size_left)
790
            return -1;
791
    }
792
    asf->packet_size_left -= rsize;
793
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
794

    
795
    return 0;
796
}
797

    
798
/**
799
 * Parse data from individual ASF packets (which were previously loaded
800
 * with asf_get_packet()).
801
 * @param s demux context
802
 * @param pb context to read data from
803
 * @param pkt pointer to store packet data into
804
 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
805
 *          packets need to be loaded (through asf_get_packet())
806
 */
807
static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
808
{
809
    ASFContext *asf = s->priv_data;
810
    ASFStream *asf_st = 0;
811
    for (;;) {
812
        if(url_feof(pb))
813
            return AVERROR_EOF;
814
        if (asf->packet_size_left < FRAME_HEADER_SIZE
815
            || asf->packet_segments < 1) {
816
            //asf->packet_size_left <= asf->packet_padsize) {
817
            int ret = asf->packet_size_left + asf->packet_padsize;
818
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
819
            assert(ret>=0);
820
            /* fail safe */
821
            url_fskip(pb, ret);
822

    
823
            asf->packet_pos= url_ftell(pb);
824
            if (asf->data_object_size != (uint64_t)-1 &&
825
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
826
                return AVERROR_EOF; /* Do not exceed the size of the data object */
827
            return 1;
828
        }
829
        if (asf->packet_time_start == 0) {
830
            if(asf_read_frame_header(s, pb) < 0){
831
                asf->packet_segments= 0;
832
                continue;
833
            }
834
            if (asf->stream_index < 0
835
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
836
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
837
                ) {
838
                asf->packet_time_start = 0;
839
                /* unhandled packet (should not happen) */
840
                url_fskip(pb, asf->packet_frag_size);
841
                asf->packet_size_left -= asf->packet_frag_size;
842
                if(asf->stream_index < 0)
843
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
844
                continue;
845
            }
846
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
847
        }
848
        asf_st = asf->asf_st;
849

    
850
        if (asf->packet_replic_size == 1) {
851
            // frag_offset is here used as the beginning timestamp
852
            asf->packet_frag_timestamp = asf->packet_time_start;
853
            asf->packet_time_start += asf->packet_time_delta;
854
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
855
            asf->packet_size_left--;
856
            asf->packet_multi_size--;
857
            if (asf->packet_multi_size < asf->packet_obj_size)
858
            {
859
                asf->packet_time_start = 0;
860
                url_fskip(pb, asf->packet_multi_size);
861
                asf->packet_size_left -= asf->packet_multi_size;
862
                continue;
863
            }
864
            asf->packet_multi_size -= asf->packet_obj_size;
865
            //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);
866
        }
867
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
868
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
869
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
870
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
871
                asf_st->frag_offset, asf->packet_frag_size,
872
                asf->packet_obj_size, asf_st->pkt.size);
873
            asf->packet_obj_size= asf_st->pkt.size;
874
        }
875

    
876
        if (   asf_st->pkt.size != asf->packet_obj_size
877
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
878
            if(asf_st->pkt.data){
879
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
880
                asf_st->frag_offset = 0;
881
                av_free_packet(&asf_st->pkt);
882
            }
883
            /* new packet */
884
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
885
            asf_st->seq = asf->packet_seq;
886
            asf_st->pkt.dts = asf->packet_frag_timestamp;
887
            asf_st->pkt.stream_index = asf->stream_index;
888
            asf_st->pkt.pos =
889
            asf_st->packet_pos= asf->packet_pos;
890
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
891
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
892
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
893
            if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
894
                asf->packet_key_frame = 1;
895
            if (asf->packet_key_frame)
896
                asf_st->pkt.flags |= PKT_FLAG_KEY;
897
        }
898

    
899
        /* read data */
900
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
901
        //       s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
902
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
903
        asf->packet_size_left -= asf->packet_frag_size;
904
        if (asf->packet_size_left < 0)
905
            continue;
906

    
907
        if(   asf->packet_frag_offset >= asf_st->pkt.size
908
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
909
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
910
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
911
            continue;
912
        }
913

    
914
        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
915
                   asf->packet_frag_size);
916
        if (s->key && s->keylen == 20)
917
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
918
                            asf->packet_frag_size);
919
        asf_st->frag_offset += asf->packet_frag_size;
920
        /* test if whole packet is read */
921
        if (asf_st->frag_offset == asf_st->pkt.size) {
922
            //workaround for macroshit radio DVR-MS files
923
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
924
               && asf_st->pkt.size > 100){
925
                int i;
926
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
927
                if(i == asf_st->pkt.size){
928
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
929
                    asf_st->frag_offset = 0;
930
                    av_free_packet(&asf_st->pkt);
931
                    continue;
932
                }
933
            }
934

    
935
            /* return packet */
936
            if (asf_st->ds_span > 1) {
937
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
938
                    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);
939
              }else{
940
                /* packet descrambling */
941
                uint8_t *newdata = av_malloc(asf_st->pkt.size);
942
                if (newdata) {
943
                    int offset = 0;
944
                    while (offset < asf_st->pkt.size) {
945
                        int off = offset / asf_st->ds_chunk_size;
946
                        int row = off / asf_st->ds_span;
947
                        int col = off % asf_st->ds_span;
948
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
949
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
950

    
951
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
952
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
953
                        memcpy(newdata + offset,
954
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
955
                               asf_st->ds_chunk_size);
956
                        offset += asf_st->ds_chunk_size;
957
                    }
958
                    av_free(asf_st->pkt.data);
959
                    asf_st->pkt.data = newdata;
960
                }
961
              }
962
            }
963
            asf_st->frag_offset = 0;
964
            *pkt= asf_st->pkt;
965
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
966
            asf_st->pkt.size = 0;
967
            asf_st->pkt.data = 0;
968
            break; // packet completed
969
        }
970
    }
971
    return 0;
972
}
973

    
974
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
975
{
976
    ASFContext *asf = s->priv_data;
977

    
978
    for (;;) {
979
        int ret;
980

    
981
        /* parse cached packets, if any */
982
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
983
            return ret;
984
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
985
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
986
        asf->packet_time_start = 0;
987
    }
988

    
989
    return 0;
990
}
991

    
992
// Added to support seeking after packets have been read
993
// If information is not reset, read_packet fails due to
994
// leftover information from previous reads
995
static void asf_reset_header(AVFormatContext *s)
996
{
997
    ASFContext *asf = s->priv_data;
998
    ASFStream *asf_st;
999
    int i;
1000

    
1001
    asf->packet_nb_frames = 0;
1002
    asf->packet_size_left = 0;
1003
    asf->packet_segments = 0;
1004
    asf->packet_flags = 0;
1005
    asf->packet_property = 0;
1006
    asf->packet_timestamp = 0;
1007
    asf->packet_segsizetype = 0;
1008
    asf->packet_segments = 0;
1009
    asf->packet_seq = 0;
1010
    asf->packet_replic_size = 0;
1011
    asf->packet_key_frame = 0;
1012
    asf->packet_padsize = 0;
1013
    asf->packet_frag_offset = 0;
1014
    asf->packet_frag_size = 0;
1015
    asf->packet_frag_timestamp = 0;
1016
    asf->packet_multi_size = 0;
1017
    asf->packet_obj_size = 0;
1018
    asf->packet_time_delta = 0;
1019
    asf->packet_time_start = 0;
1020

    
1021
    for(i=0; i<s->nb_streams; i++){
1022
        asf_st= s->streams[i]->priv_data;
1023
        av_free_packet(&asf_st->pkt);
1024
        asf_st->frag_offset=0;
1025
        asf_st->seq=0;
1026
    }
1027
    asf->asf_st= NULL;
1028
}
1029

    
1030
static int asf_read_close(AVFormatContext *s)
1031
{
1032
    int i;
1033

    
1034
    asf_reset_header(s);
1035
    for(i=0;i<s->nb_streams;i++) {
1036
        AVStream *st = s->streams[i];
1037
        av_free(st->codec->palctrl);
1038
    }
1039
    return 0;
1040
}
1041

    
1042
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1043
{
1044
    AVPacket pkt1, *pkt = &pkt1;
1045
    ASFStream *asf_st;
1046
    int64_t pts;
1047
    int64_t pos= *ppos;
1048
    int i;
1049
    int64_t start_pos[s->nb_streams];
1050

    
1051
    for(i=0; i<s->nb_streams; i++){
1052
        start_pos[i]= pos;
1053
    }
1054

    
1055
    if (s->packet_size > 0)
1056
        pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1057
    *ppos= pos;
1058
    url_fseek(s->pb, pos, SEEK_SET);
1059

    
1060
//printf("asf_read_pts\n");
1061
    asf_reset_header(s);
1062
    for(;;){
1063
        if (av_read_frame(s, pkt) < 0){
1064
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1065
            return AV_NOPTS_VALUE;
1066
        }
1067

    
1068
        pts= pkt->pts;
1069

    
1070
        av_free_packet(pkt);
1071
        if(pkt->flags&PKT_FLAG_KEY){
1072
            i= pkt->stream_index;
1073

    
1074
            asf_st= s->streams[i]->priv_data;
1075

    
1076
//            assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1077
            pos= asf_st->packet_pos;
1078

    
1079
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1080
            start_pos[i]= asf_st->packet_pos + 1;
1081

    
1082
            if(pkt->stream_index == stream_index)
1083
               break;
1084
        }
1085
    }
1086

    
1087
    *ppos= pos;
1088
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1089

    
1090
    return pts;
1091
}
1092

    
1093
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1094
{
1095
    ff_asf_guid g;
1096
    ASFContext *asf = s->priv_data;
1097
    int64_t current_pos= url_ftell(s->pb);
1098
    int i;
1099

    
1100
    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1101
    get_guid(s->pb, &g);
1102
    if (!guidcmp(&g, &index_guid)) {
1103
        int64_t itime, last_pos=-1;
1104
        int pct, ict;
1105
        int64_t av_unused gsize= get_le64(s->pb);
1106
        get_guid(s->pb, &g);
1107
        itime=get_le64(s->pb);
1108
        pct=get_le32(s->pb);
1109
        ict=get_le32(s->pb);
1110
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1111

    
1112
        for (i=0;i<ict;i++){
1113
            int pktnum=get_le32(s->pb);
1114
            int pktct =get_le16(s->pb);
1115
            int64_t pos      = s->data_offset + s->packet_size*(int64_t)pktnum;
1116
            int64_t index_pts= av_rescale(itime, i, 10000);
1117

    
1118
            if(pos != last_pos){
1119
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1120
            av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1121
            last_pos=pos;
1122
            }
1123
        }
1124
        asf->index_read= 1;
1125
    }
1126
    url_fseek(s->pb, current_pos, SEEK_SET);
1127
}
1128

    
1129
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1130
{
1131
    ASFContext *asf = s->priv_data;
1132
    AVStream *st = s->streams[stream_index];
1133
    int64_t pos;
1134
    int index;
1135

    
1136
    if (s->packet_size <= 0)
1137
        return -1;
1138

    
1139
    /* Try using the protocol's read_seek if available */
1140
    if(s->pb) {
1141
        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1142
        if(ret >= 0)
1143
            asf_reset_header(s);
1144
        if (ret != AVERROR(ENOSYS))
1145
            return ret;
1146
    }
1147

    
1148
    if (!asf->index_read)
1149
        asf_build_simple_index(s, stream_index);
1150

    
1151
    if(!(asf->index_read && st->index_entries)){
1152
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1153
            return -1;
1154
    }else{
1155
        index= av_index_search_timestamp(st, pts, flags);
1156
        if(index<0)
1157
            return -1;
1158

    
1159
        /* find the position */
1160
        pos = st->index_entries[index].pos;
1161

    
1162
    // various attempts to find key frame have failed so far
1163
    //    asf_reset_header(s);
1164
    //    url_fseek(s->pb, pos, SEEK_SET);
1165
    //    key_pos = pos;
1166
    //     for(i=0;i<16;i++){
1167
    //         pos = url_ftell(s->pb);
1168
    //         if (av_read_frame(s, &pkt) < 0){
1169
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1170
    //             return -1;
1171
    //         }
1172
    //         asf_st = s->streams[stream_index]->priv_data;
1173
    //         pos += st->parser->frame_offset;
1174
    //
1175
    //         if (pkt.size > b) {
1176
    //             b = pkt.size;
1177
    //             key_pos = pos;
1178
    //         }
1179
    //
1180
    //         av_free_packet(&pkt);
1181
    //     }
1182

    
1183
        /* do the seek */
1184
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1185
        url_fseek(s->pb, pos, SEEK_SET);
1186
    }
1187
    asf_reset_header(s);
1188
    return 0;
1189
}
1190

    
1191
AVInputFormat asf_demuxer = {
1192
    "asf",
1193
    NULL_IF_CONFIG_SMALL("ASF format"),
1194
    sizeof(ASFContext),
1195
    asf_probe,
1196
    asf_read_header,
1197
    asf_read_packet,
1198
    asf_read_close,
1199
    asf_read_seek,
1200
    asf_read_pts,
1201
    .metadata_conv = ff_asf_metadata_conv,
1202
};