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ffmpeg / libavformat / asfdec.c @ e4e234fa

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1
/*
2
 * ASF compatible demuxer
3
 * Copyright (c) 2000, 2001 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
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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

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

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

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

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

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

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

    
52
#ifdef DEBUG
53
#define PRINT_IF_GUID(g,cmp) \
54
if (!ff_guidcmp(g, &cmp)) \
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    av_dlog(NULL, "(GUID: %s) ", #cmp)
56

    
57
static void print_guid(const ff_asf_guid *g)
58
{
59
    int i;
60
    PRINT_IF_GUID(g, ff_asf_header);
61
    else PRINT_IF_GUID(g, ff_asf_file_header);
62
    else PRINT_IF_GUID(g, ff_asf_stream_header);
63
    else PRINT_IF_GUID(g, ff_asf_audio_stream);
64
    else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
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    else PRINT_IF_GUID(g, ff_asf_video_stream);
66
    else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
67
    else PRINT_IF_GUID(g, ff_asf_command_stream);
68
    else PRINT_IF_GUID(g, ff_asf_comment_header);
69
    else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
70
    else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
71
    else PRINT_IF_GUID(g, ff_asf_data_header);
72
    else PRINT_IF_GUID(g, index_guid);
73
    else PRINT_IF_GUID(g, ff_asf_head1_guid);
74
    else PRINT_IF_GUID(g, ff_asf_head2_guid);
75
    else PRINT_IF_GUID(g, ff_asf_my_guid);
76
    else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
77
    else PRINT_IF_GUID(g, ff_asf_extended_content_header);
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    else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
79
    else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
80
    else PRINT_IF_GUID(g, ff_asf_metadata_header);
81
    else PRINT_IF_GUID(g, ff_asf_marker_header);
82
    else PRINT_IF_GUID(g, stream_bitrate_guid);
83
    else PRINT_IF_GUID(g, ff_asf_language_guid);
84
    else
85
        av_dlog(NULL, "(GUID: unknown) ");
86
    for(i=0;i<16;i++)
87
        av_dlog(NULL, " 0x%02x,", (*g)[i]);
88
    av_dlog(NULL, "}\n");
89
}
90
#undef PRINT_IF_GUID
91
#else
92
#define print_guid(g)
93
#endif
94

    
95
void ff_get_guid(ByteIOContext *s, ff_asf_guid *g)
96
{
97
    assert(sizeof(*g) == 16);
98
    get_buffer(s, *g, sizeof(*g));
99
}
100

    
101
static int asf_probe(AVProbeData *pd)
102
{
103
    /* check file header */
104
    if (!ff_guidcmp(pd->buf, &ff_asf_header))
105
        return AVPROBE_SCORE_MAX;
106
    else
107
        return 0;
108
}
109

    
110
static int get_value(ByteIOContext *pb, int type){
111
    switch(type){
112
        case 2: return get_le32(pb);
113
        case 3: return get_le32(pb);
114
        case 4: return get_le64(pb);
115
        case 5: return get_le16(pb);
116
        default:return INT_MIN;
117
    }
118
}
119

    
120
static void get_tag(AVFormatContext *s, const char *key, int type, int len)
121
{
122
    char *value;
123
    int64_t off = url_ftell(s->pb);
124

    
125
    if ((unsigned)len >= (UINT_MAX - 1)/2)
126
        return;
127

    
128
    value = av_malloc(2*len+1);
129
    if (!value)
130
        goto finish;
131

    
132
    if (type == 0) {         // UTF16-LE
133
        avio_get_str16le(s->pb, len, value, 2*len + 1);
134
    } else if (type > 1 && type <= 5) {  // boolean or DWORD or QWORD or WORD
135
        uint64_t num = get_value(s->pb, type);
136
        snprintf(value, len, "%"PRIu64, num);
137
    } else {
138
        av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
139
        goto finish;
140
    }
141
    av_metadata_set2(&s->metadata, key, value, 0);
142
finish:
143
    av_freep(&value);
144
    url_fseek(s->pb, off + len, SEEK_SET);
145
}
146

    
147
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
148
{
149
    ASFContext *asf = s->priv_data;
150
    ff_asf_guid g;
151
    ByteIOContext *pb = s->pb;
152
    AVStream *st;
153
    ASFStream *asf_st;
154
    int size, i;
155
    int64_t gsize;
156
    AVRational dar[128];
157
    uint32_t bitrate[128];
158

    
159
    memset(dar, 0, sizeof(dar));
160
    memset(bitrate, 0, sizeof(bitrate));
161

    
162
    ff_get_guid(pb, &g);
163
    if (ff_guidcmp(&g, &ff_asf_header))
164
        return -1;
165
    get_le64(pb);
166
    get_le32(pb);
167
    get_byte(pb);
168
    get_byte(pb);
169
    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
170
    for(;;) {
171
        uint64_t gpos= url_ftell(pb);
172
        int ret;
173
        ff_get_guid(pb, &g);
174
        gsize = get_le64(pb);
175
        av_dlog(s, "%08"PRIx64": ", gpos);
176
        print_guid(&g);
177
        av_dlog(s, "  size=0x%"PRIx64"\n", gsize);
178
        if (!ff_guidcmp(&g, &ff_asf_data_header)) {
179
            asf->data_object_offset = url_ftell(pb);
180
            // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
181
            if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
182
                asf->data_object_size = gsize - 24;
183
            } else {
184
                asf->data_object_size = (uint64_t)-1;
185
            }
186
            break;
187
        }
188
        if (gsize < 24)
189
            return -1;
190
        if (!ff_guidcmp(&g, &ff_asf_file_header)) {
191
            ff_get_guid(pb, &asf->hdr.guid);
192
            asf->hdr.file_size          = get_le64(pb);
193
            asf->hdr.create_time        = get_le64(pb);
194
            asf->nb_packets             = get_le64(pb);
195
            asf->hdr.play_time          = get_le64(pb);
196
            asf->hdr.send_time          = get_le64(pb);
197
            asf->hdr.preroll            = get_le32(pb);
198
            asf->hdr.ignore             = get_le32(pb);
199
            asf->hdr.flags              = get_le32(pb);
200
            asf->hdr.min_pktsize        = get_le32(pb);
201
            asf->hdr.max_pktsize        = get_le32(pb);
202
            asf->hdr.max_bitrate        = get_le32(pb);
203
            s->packet_size = asf->hdr.max_pktsize;
204
        } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
205
            enum AVMediaType type;
206
            int type_specific_size, sizeX;
207
            uint64_t total_size;
208
            unsigned int tag1;
209
            int64_t pos1, pos2, start_time;
210
            int test_for_ext_stream_audio, is_dvr_ms_audio=0;
211

    
212
            if (s->nb_streams == ASF_MAX_STREAMS) {
213
                av_log(s, AV_LOG_ERROR, "too many streams\n");
214
                return AVERROR(EINVAL);
215
            }
216

    
217
            pos1 = url_ftell(pb);
218

    
219
            st = av_new_stream(s, 0);
220
            if (!st)
221
                return AVERROR(ENOMEM);
222
            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
223
            asf_st = av_mallocz(sizeof(ASFStream));
224
            if (!asf_st)
225
                return AVERROR(ENOMEM);
226
            st->priv_data = asf_st;
227
            start_time = asf->hdr.preroll;
228

    
229
            asf_st->stream_language_index = 128; // invalid stream index means no language info
230

    
231
            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
232
                st->duration = asf->hdr.play_time /
233
                    (10000000 / 1000) - start_time;
234
            }
235
            ff_get_guid(pb, &g);
236

    
237
            test_for_ext_stream_audio = 0;
238
            if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
239
                type = AVMEDIA_TYPE_AUDIO;
240
            } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
241
                type = AVMEDIA_TYPE_VIDEO;
242
            } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
243
                type = AVMEDIA_TYPE_VIDEO;
244
                st->codec->codec_id = CODEC_ID_MJPEG;
245
            } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
246
                type = AVMEDIA_TYPE_DATA;
247
            } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
248
                test_for_ext_stream_audio = 1;
249
                type = AVMEDIA_TYPE_UNKNOWN;
250
            } else {
251
                return -1;
252
            }
253
            ff_get_guid(pb, &g);
254
            total_size = get_le64(pb);
255
            type_specific_size = get_le32(pb);
256
            get_le32(pb);
257
            st->id = get_le16(pb) & 0x7f; /* stream id */
258
            // mapping of asf ID to AV stream ID;
259
            asf->asfid2avid[st->id] = s->nb_streams - 1;
260

    
261
            get_le32(pb);
262

    
263
            if (test_for_ext_stream_audio) {
264
                ff_get_guid(pb, &g);
265
                if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
266
                    type = AVMEDIA_TYPE_AUDIO;
267
                    is_dvr_ms_audio=1;
268
                    ff_get_guid(pb, &g);
269
                    get_le32(pb);
270
                    get_le32(pb);
271
                    get_le32(pb);
272
                    ff_get_guid(pb, &g);
273
                    get_le32(pb);
274
                }
275
            }
276

    
277
            st->codec->codec_type = type;
278
            if (type == AVMEDIA_TYPE_AUDIO) {
279
                ff_get_wav_header(pb, st->codec, type_specific_size);
280
                if (is_dvr_ms_audio) {
281
                    // codec_id and codec_tag are unreliable in dvr_ms
282
                    // files. Set them later by probing stream.
283
                    st->codec->codec_id = CODEC_ID_PROBE;
284
                    st->codec->codec_tag = 0;
285
                }
286
                if (st->codec->codec_id == CODEC_ID_AAC) {
287
                    st->need_parsing = AVSTREAM_PARSE_NONE;
288
                } else {
289
                    st->need_parsing = AVSTREAM_PARSE_FULL;
290
                }
291
                /* We have to init the frame size at some point .... */
292
                pos2 = url_ftell(pb);
293
                if (gsize >= (pos2 + 8 - pos1 + 24)) {
294
                    asf_st->ds_span = get_byte(pb);
295
                    asf_st->ds_packet_size = get_le16(pb);
296
                    asf_st->ds_chunk_size = get_le16(pb);
297
                    get_le16(pb); //ds_data_size
298
                    get_byte(pb); //ds_silence_data
299
                }
300
                //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
301
                //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
302
                //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
303
                if (asf_st->ds_span > 1) {
304
                    if (!asf_st->ds_chunk_size
305
                        || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
306
                        || asf_st->ds_packet_size % asf_st->ds_chunk_size)
307
                        asf_st->ds_span = 0; // disable descrambling
308
                }
309
                switch (st->codec->codec_id) {
310
                case CODEC_ID_MP3:
311
                    st->codec->frame_size = MPA_FRAME_SIZE;
312
                    break;
313
                case CODEC_ID_PCM_S16LE:
314
                case CODEC_ID_PCM_S16BE:
315
                case CODEC_ID_PCM_U16LE:
316
                case CODEC_ID_PCM_U16BE:
317
                case CODEC_ID_PCM_S8:
318
                case CODEC_ID_PCM_U8:
319
                case CODEC_ID_PCM_ALAW:
320
                case CODEC_ID_PCM_MULAW:
321
                    st->codec->frame_size = 1;
322
                    break;
323
                default:
324
                    /* This is probably wrong, but it prevents a crash later */
325
                    st->codec->frame_size = 1;
326
                    break;
327
                }
328
            } else if (type == AVMEDIA_TYPE_VIDEO &&
329
                       gsize - (url_ftell(pb) - pos1 + 24) >= 51) {
330
                get_le32(pb);
331
                get_le32(pb);
332
                get_byte(pb);
333
                size = get_le16(pb); /* size */
334
                sizeX= get_le32(pb); /* size */
335
                st->codec->width = get_le32(pb);
336
                st->codec->height = get_le32(pb);
337
                /* not available for asf */
338
                get_le16(pb); /* panes */
339
                st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
340
                tag1 = get_le32(pb);
341
                url_fskip(pb, 20);
342
//                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
343
                size= sizeX;
344
                if (size > 40) {
345
                    st->codec->extradata_size = size - 40;
346
                    st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
347
                    get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
348
                }
349

    
350
                /* Extract palette from extradata if bpp <= 8 */
351
                /* This code assumes that extradata contains only palette */
352
                /* This is true for all paletted codecs implemented in ffmpeg */
353
                if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
354
                    st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
355
#if HAVE_BIGENDIAN
356
                    for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
357
                        st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
358
#else
359
                    memcpy(st->codec->palctrl->palette, st->codec->extradata,
360
                           FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
361
#endif
362
                    st->codec->palctrl->palette_changed = 1;
363
                }
364

    
365
                st->codec->codec_tag = tag1;
366
                st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
367
                if(tag1 == MKTAG('D', 'V', 'R', ' ')){
368
                    st->need_parsing = AVSTREAM_PARSE_FULL;
369
                    // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
370
                    st->codec->width  =
371
                    st->codec->height = 0;
372
                    av_freep(&st->codec->extradata);
373
                    st->codec->extradata_size=0;
374
                }
375
                if(st->codec->codec_id == CODEC_ID_H264)
376
                    st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
377
            }
378
            pos2 = url_ftell(pb);
379
            url_fskip(pb, gsize - (pos2 - pos1 + 24));
380
        } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
381
            int len1, len2, len3, len4, len5;
382

    
383
            len1 = get_le16(pb);
384
            len2 = get_le16(pb);
385
            len3 = get_le16(pb);
386
            len4 = get_le16(pb);
387
            len5 = get_le16(pb);
388
            get_tag(s, "title"    , 0, len1);
389
            get_tag(s, "author"   , 0, len2);
390
            get_tag(s, "copyright", 0, len3);
391
            get_tag(s, "comment"  , 0, len4);
392
            url_fskip(pb, len5);
393
        } else if (!ff_guidcmp(&g, &stream_bitrate_guid)) {
394
            int stream_count = get_le16(pb);
395
            int j;
396

    
397
//            av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
398
//            av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
399
            for(j = 0; j < stream_count; j++) {
400
                int flags, bitrate, stream_id;
401

    
402
                flags= get_le16(pb);
403
                bitrate= get_le32(pb);
404
                stream_id= (flags & 0x7f);
405
//                av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
406
                asf->stream_bitrates[stream_id]= bitrate;
407
            }
408
        } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
409
            int j;
410
            int stream_count = get_le16(pb);
411
            for(j = 0; j < stream_count; j++) {
412
                char lang[6];
413
                unsigned int lang_len = get_byte(pb);
414
                if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
415
                    url_fskip(pb, lang_len - ret);
416
                if (j < 128)
417
                    av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
418
            }
419
        } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
420
            int desc_count, i;
421

    
422
            desc_count = get_le16(pb);
423
            for(i=0;i<desc_count;i++) {
424
                    int name_len,value_type,value_len;
425
                    char name[1024];
426

    
427
                    name_len = get_le16(pb);
428
                    if (name_len%2)     // must be even, broken lavf versions wrote len-1
429
                        name_len += 1;
430
                    if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
431
                        url_fskip(pb, name_len - ret);
432
                    value_type = get_le16(pb);
433
                    value_len  = get_le16(pb);
434
                    if (!value_type && value_len%2)
435
                        value_len += 1;
436
                    /**
437
                     * My sample has that stream set to 0 maybe that mean the container.
438
                     * Asf stream count start at 1. I am using 0 to the container value since it's unused
439
                     */
440
                    if (!strcmp(name, "AspectRatioX")){
441
                        dar[0].num= get_value(s->pb, value_type);
442
                    } else if(!strcmp(name, "AspectRatioY")){
443
                        dar[0].den= get_value(s->pb, value_type);
444
                    } else
445
                        get_tag(s, name, value_type, value_len);
446
            }
447
        } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
448
            int n, stream_num, name_len, value_len, value_type, value_num;
449
            n = get_le16(pb);
450

    
451
            for(i=0;i<n;i++) {
452
                char name[1024];
453

    
454
                get_le16(pb); //lang_list_index
455
                stream_num= get_le16(pb);
456
                name_len=   get_le16(pb);
457
                value_type= get_le16(pb);
458
                value_len=  get_le32(pb);
459

    
460
                if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
461
                    url_fskip(pb, name_len - ret);
462
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
463
                value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
464
                url_fskip(pb, value_len - 2);
465

    
466
                if(stream_num<128){
467
                    if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
468
                    else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
469
                }
470
            }
471
        } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
472
            int ext_len, payload_ext_ct, stream_ct;
473
            uint32_t ext_d, leak_rate, stream_num;
474
            unsigned int stream_languageid_index;
475

    
476
            get_le64(pb); // starttime
477
            get_le64(pb); // endtime
478
            leak_rate = get_le32(pb); // leak-datarate
479
            get_le32(pb); // bucket-datasize
480
            get_le32(pb); // init-bucket-fullness
481
            get_le32(pb); // alt-leak-datarate
482
            get_le32(pb); // alt-bucket-datasize
483
            get_le32(pb); // alt-init-bucket-fullness
484
            get_le32(pb); // max-object-size
485
            get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
486
            stream_num = get_le16(pb); // stream-num
487

    
488
            stream_languageid_index = get_le16(pb); // stream-language-id-index
489
            if (stream_num < 128)
490
                asf->streams[stream_num].stream_language_index = stream_languageid_index;
491

    
492
            get_le64(pb); // avg frametime in 100ns units
493
            stream_ct = get_le16(pb); //stream-name-count
494
            payload_ext_ct = get_le16(pb); //payload-extension-system-count
495

    
496
            if (stream_num < 128)
497
                bitrate[stream_num] = leak_rate;
498

    
499
            for (i=0; i<stream_ct; i++){
500
                get_le16(pb);
501
                ext_len = get_le16(pb);
502
                url_fseek(pb, ext_len, SEEK_CUR);
503
            }
504

    
505
            for (i=0; i<payload_ext_ct; i++){
506
                ff_get_guid(pb, &g);
507
                ext_d=get_le16(pb);
508
                ext_len=get_le32(pb);
509
                url_fseek(pb, ext_len, SEEK_CUR);
510
            }
511

    
512
            // there could be a optional stream properties object to follow
513
            // if so the next iteration will pick it up
514
            continue;
515
        } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
516
            int v1, v2;
517
            ff_get_guid(pb, &g);
518
            v1 = get_le32(pb);
519
            v2 = get_le16(pb);
520
            continue;
521
        } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
522
            int i, count, name_len;
523
            char name[1024];
524

    
525
            get_le64(pb);            // reserved 16 bytes
526
            get_le64(pb);            // ...
527
            count = get_le32(pb);    // markers count
528
            get_le16(pb);            // reserved 2 bytes
529
            name_len = get_le16(pb); // name length
530
            for(i=0;i<name_len;i++){
531
                get_byte(pb); // skip the name
532
            }
533

    
534
            for(i=0;i<count;i++){
535
                int64_t pres_time;
536
                int name_len;
537

    
538
                get_le64(pb);             // offset, 8 bytes
539
                pres_time = get_le64(pb); // presentation time
540
                get_le16(pb);             // entry length
541
                get_le32(pb);             // send time
542
                get_le32(pb);             // flags
543
                name_len = get_le32(pb);  // name length
544
                if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
545
                    url_fskip(pb, name_len - ret);
546
                ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
547
            }
548
        } else if (url_feof(pb)) {
549
            return -1;
550
        } else {
551
            if (!s->keylen) {
552
                if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
553
                    av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
554
                } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
555
                    av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
556
                } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
557
                    av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
558
                }
559
            }
560
        }
561
        if(url_ftell(pb) != gpos + gsize)
562
            av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
563
        url_fseek(pb, gpos + gsize, SEEK_SET);
564
    }
565
    ff_get_guid(pb, &g);
566
    get_le64(pb);
567
    get_byte(pb);
568
    get_byte(pb);
569
    if (url_feof(pb))
570
        return -1;
571
    asf->data_offset = url_ftell(pb);
572
    asf->packet_size_left = 0;
573

    
574

    
575
    for(i=0; i<128; i++){
576
        int stream_num= asf->asfid2avid[i];
577
        if(stream_num>=0){
578
            AVStream *st = s->streams[stream_num];
579
            if (!st->codec->bit_rate)
580
                st->codec->bit_rate = bitrate[i];
581
            if (dar[i].num > 0 && dar[i].den > 0){
582
                av_reduce(&st->sample_aspect_ratio.num,
583
                          &st->sample_aspect_ratio.den,
584
                          dar[i].num, dar[i].den, INT_MAX);
585
            } else if ((dar[0].num > 0) && (dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
586
                av_reduce(&st->sample_aspect_ratio.num,
587
                          &st->sample_aspect_ratio.den,
588
                          dar[0].num, dar[0].den, INT_MAX);
589

    
590
//av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
591

    
592
            // copy and convert language codes to the frontend
593
            if (asf->streams[i].stream_language_index < 128) {
594
                const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
595
                if (rfc1766 && strlen(rfc1766) > 1) {
596
                    const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
597
                    const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
598
                    if (iso6392)
599
                        av_metadata_set2(&st->metadata, "language", iso6392, 0);
600
                }
601
            }
602
        }
603
    }
604

    
605
    ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
606

    
607
    return 0;
608
}
609

    
610
#define DO_2BITS(bits, var, defval) \
611
    switch (bits & 3) \
612
    { \
613
    case 3: var = get_le32(pb); rsize += 4; break; \
614
    case 2: var = get_le16(pb); rsize += 2; break; \
615
    case 1: var = get_byte(pb); rsize++; break; \
616
    default: var = defval; break; \
617
    }
618

    
619
/**
620
 * Load a single ASF packet into the demuxer.
621
 * @param s demux context
622
 * @param pb context to read data from
623
 * @return 0 on success, <0 on error
624
 */
625
static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
626
{
627
    ASFContext *asf = s->priv_data;
628
    uint32_t packet_length, padsize;
629
    int rsize = 8;
630
    int c, d, e, off;
631

    
632
    // if we do not know packet size, allow skipping up to 32 kB
633
    off= 32768;
634
    if (s->packet_size > 0)
635
        off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
636

    
637
    c=d=e=-1;
638
    while(off-- > 0){
639
        c=d; d=e;
640
        e= get_byte(pb);
641
        if(c == 0x82 && !d && !e)
642
            break;
643
    }
644

    
645
    if (c != 0x82) {
646
        /**
647
         * This code allows handling of -EAGAIN at packet boundaries (i.e.
648
         * if the packet sync code above triggers -EAGAIN). This does not
649
         * imply complete -EAGAIN handling support at random positions in
650
         * the stream.
651
         */
652
        if (url_ferror(pb) == AVERROR(EAGAIN))
653
            return AVERROR(EAGAIN);
654
        if (!url_feof(pb))
655
            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
656
    }
657
    if ((c & 0x8f) == 0x82) {
658
        if (d || e) {
659
            if (!url_feof(pb))
660
                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
661
            return -1;
662
        }
663
        c= get_byte(pb);
664
        d= get_byte(pb);
665
        rsize+=3;
666
    }else{
667
        url_fseek(pb, -1, SEEK_CUR); //FIXME
668
    }
669

    
670
    asf->packet_flags    = c;
671
    asf->packet_property = d;
672

    
673
    DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
674
    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
675
    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
676

    
677
    //the following checks prevent overflows and infinite loops
678
    if(!packet_length || packet_length >= (1U<<29)){
679
        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
680
        return -1;
681
    }
682
    if(padsize >= packet_length){
683
        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
684
        return -1;
685
    }
686

    
687
    asf->packet_timestamp = get_le32(pb);
688
    get_le16(pb); /* duration */
689
    // rsize has at least 11 bytes which have to be present
690

    
691
    if (asf->packet_flags & 0x01) {
692
        asf->packet_segsizetype = get_byte(pb); rsize++;
693
        asf->packet_segments = asf->packet_segsizetype & 0x3f;
694
    } else {
695
        asf->packet_segments = 1;
696
        asf->packet_segsizetype = 0x80;
697
    }
698
    asf->packet_size_left = packet_length - padsize - rsize;
699
    if (packet_length < asf->hdr.min_pktsize)
700
        padsize += asf->hdr.min_pktsize - packet_length;
701
    asf->packet_padsize = padsize;
702
    av_dlog(s, "packet: size=%d padsize=%d  left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
703
    return 0;
704
}
705

    
706
/**
707
 *
708
 * @return <0 if error
709
 */
710
static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
711
    ASFContext *asf = s->priv_data;
712
    int rsize = 1;
713
    int num = get_byte(pb);
714
    int64_t ts0, ts1;
715

    
716
    asf->packet_segments--;
717
    asf->packet_key_frame = num >> 7;
718
    asf->stream_index = asf->asfid2avid[num & 0x7f];
719
    // sequence should be ignored!
720
    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
721
    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
722
    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
723
//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);
724
    if (asf->packet_replic_size >= 8) {
725
        asf->packet_obj_size = get_le32(pb);
726
        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
727
            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
728
            return -1;
729
        }
730
        asf->packet_frag_timestamp = get_le32(pb); // timestamp
731
        if(asf->packet_replic_size >= 8+38+4){
732
//            for(i=0; i<asf->packet_replic_size-8; i++)
733
//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
734
//            av_log(s, AV_LOG_DEBUG, "\n");
735
            url_fskip(pb, 10);
736
            ts0= get_le64(pb);
737
            ts1= get_le64(pb);
738
            url_fskip(pb, 12);
739
            get_le32(pb);
740
            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
741
            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
742
            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
743
        }else
744
            url_fskip(pb, asf->packet_replic_size - 8);
745
        rsize += asf->packet_replic_size; // FIXME - check validity
746
    } else if (asf->packet_replic_size==1){
747
        // multipacket - frag_offset is beginning timestamp
748
        asf->packet_time_start = asf->packet_frag_offset;
749
        asf->packet_frag_offset = 0;
750
        asf->packet_frag_timestamp = asf->packet_timestamp;
751

    
752
        asf->packet_time_delta = get_byte(pb);
753
        rsize++;
754
    }else if(asf->packet_replic_size!=0){
755
        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
756
        return -1;
757
    }
758
    if (asf->packet_flags & 0x01) {
759
        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
760
        if(asf->packet_frag_size > asf->packet_size_left - rsize){
761
            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
762
            return -1;
763
        }
764
        //printf("Fragsize %d\n", asf->packet_frag_size);
765
    } else {
766
        asf->packet_frag_size = asf->packet_size_left - rsize;
767
        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
768
    }
769
    if (asf->packet_replic_size == 1) {
770
        asf->packet_multi_size = asf->packet_frag_size;
771
        if (asf->packet_multi_size > asf->packet_size_left)
772
            return -1;
773
    }
774
    asf->packet_size_left -= rsize;
775
    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
776

    
777
    return 0;
778
}
779

    
780
/**
781
 * Parse data from individual ASF packets (which were previously loaded
782
 * with asf_get_packet()).
783
 * @param s demux context
784
 * @param pb context to read data from
785
 * @param pkt pointer to store packet data into
786
 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
787
 *          packets need to be loaded (through asf_get_packet())
788
 */
789
static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
790
{
791
    ASFContext *asf = s->priv_data;
792
    ASFStream *asf_st = 0;
793
    for (;;) {
794
        int ret;
795
        if(url_feof(pb))
796
            return AVERROR_EOF;
797
        if (asf->packet_size_left < FRAME_HEADER_SIZE
798
            || asf->packet_segments < 1) {
799
            //asf->packet_size_left <= asf->packet_padsize) {
800
            int ret = asf->packet_size_left + asf->packet_padsize;
801
            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
802
            assert(ret>=0);
803
            /* fail safe */
804
            url_fskip(pb, ret);
805

    
806
            asf->packet_pos= url_ftell(pb);
807
            if (asf->data_object_size != (uint64_t)-1 &&
808
                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
809
                return AVERROR_EOF; /* Do not exceed the size of the data object */
810
            return 1;
811
        }
812
        if (asf->packet_time_start == 0) {
813
            if(asf_read_frame_header(s, pb) < 0){
814
                asf->packet_segments= 0;
815
                continue;
816
            }
817
            if (asf->stream_index < 0
818
                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
819
                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
820
                ) {
821
                asf->packet_time_start = 0;
822
                /* unhandled packet (should not happen) */
823
                url_fskip(pb, asf->packet_frag_size);
824
                asf->packet_size_left -= asf->packet_frag_size;
825
                if(asf->stream_index < 0)
826
                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
827
                continue;
828
            }
829
            asf->asf_st = s->streams[asf->stream_index]->priv_data;
830
        }
831
        asf_st = asf->asf_st;
832

    
833
        if (asf->packet_replic_size == 1) {
834
            // frag_offset is here used as the beginning timestamp
835
            asf->packet_frag_timestamp = asf->packet_time_start;
836
            asf->packet_time_start += asf->packet_time_delta;
837
            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
838
            asf->packet_size_left--;
839
            asf->packet_multi_size--;
840
            if (asf->packet_multi_size < asf->packet_obj_size)
841
            {
842
                asf->packet_time_start = 0;
843
                url_fskip(pb, asf->packet_multi_size);
844
                asf->packet_size_left -= asf->packet_multi_size;
845
                continue;
846
            }
847
            asf->packet_multi_size -= asf->packet_obj_size;
848
            //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);
849
        }
850
        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
851
              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
852
           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
853
            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
854
                asf_st->frag_offset, asf->packet_frag_size,
855
                asf->packet_obj_size, asf_st->pkt.size);
856
            asf->packet_obj_size= asf_st->pkt.size;
857
        }
858

    
859
        if (   asf_st->pkt.size != asf->packet_obj_size
860
            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
861
            if(asf_st->pkt.data){
862
                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
863
                asf_st->frag_offset = 0;
864
                av_free_packet(&asf_st->pkt);
865
            }
866
            /* new packet */
867
            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
868
            asf_st->seq = asf->packet_seq;
869
            asf_st->pkt.dts = asf->packet_frag_timestamp;
870
            asf_st->pkt.stream_index = asf->stream_index;
871
            asf_st->pkt.pos =
872
            asf_st->packet_pos= asf->packet_pos;
873
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
874
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
875
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
876
            if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
877
                asf->packet_key_frame = 1;
878
            if (asf->packet_key_frame)
879
                asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
880
        }
881

    
882
        /* read data */
883
        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
884
        //       s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
885
        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
886
        asf->packet_size_left -= asf->packet_frag_size;
887
        if (asf->packet_size_left < 0)
888
            continue;
889

    
890
        if(   asf->packet_frag_offset >= asf_st->pkt.size
891
           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
892
            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
893
                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
894
            continue;
895
        }
896

    
897
        ret = get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
898
                         asf->packet_frag_size);
899
        if (ret != asf->packet_frag_size) {
900
            if (ret < 0 || asf->packet_frag_offset + ret == 0)
901
                return ret < 0 ? ret : AVERROR_EOF;
902
            if (asf_st->ds_span > 1) {
903
                // scrambling, we can either drop it completely or fill the remainder
904
                // TODO: should we fill the whole packet instead of just the current
905
                // fragment?
906
                memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
907
                       asf->packet_frag_size - ret);
908
                ret = asf->packet_frag_size;
909
            } else
910
                // no scrambling, so we can return partial packets
911
                av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
912
        }
913
        if (s->key && s->keylen == 20)
914
            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
915
                            ret);
916
        asf_st->frag_offset += ret;
917
        /* test if whole packet is read */
918
        if (asf_st->frag_offset == asf_st->pkt.size) {
919
            //workaround for macroshit radio DVR-MS files
920
            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
921
               && asf_st->pkt.size > 100){
922
                int i;
923
                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
924
                if(i == asf_st->pkt.size){
925
                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
926
                    asf_st->frag_offset = 0;
927
                    av_free_packet(&asf_st->pkt);
928
                    continue;
929
                }
930
            }
931

    
932
            /* return packet */
933
            if (asf_st->ds_span > 1) {
934
              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
935
                    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);
936
              }else{
937
                /* packet descrambling */
938
                uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
939
                if (newdata) {
940
                    int offset = 0;
941
                    memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
942
                    while (offset < asf_st->pkt.size) {
943
                        int off = offset / asf_st->ds_chunk_size;
944
                        int row = off / asf_st->ds_span;
945
                        int col = off % asf_st->ds_span;
946
                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
947
                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
948

    
949
                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
950
                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
951
                        memcpy(newdata + offset,
952
                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
953
                               asf_st->ds_chunk_size);
954
                        offset += asf_st->ds_chunk_size;
955
                    }
956
                    av_free(asf_st->pkt.data);
957
                    asf_st->pkt.data = newdata;
958
                }
959
              }
960
            }
961
            asf_st->frag_offset = 0;
962
            *pkt= asf_st->pkt;
963
            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
964
            asf_st->pkt.size = 0;
965
            asf_st->pkt.data = 0;
966
            break; // packet completed
967
        }
968
    }
969
    return 0;
970
}
971

    
972
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
973
{
974
    ASFContext *asf = s->priv_data;
975

    
976
    for (;;) {
977
        int ret;
978

    
979
        /* parse cached packets, if any */
980
        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
981
            return ret;
982
        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
983
            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
984
        asf->packet_time_start = 0;
985
    }
986

    
987
    return 0;
988
}
989

    
990
// Added to support seeking after packets have been read
991
// If information is not reset, read_packet fails due to
992
// leftover information from previous reads
993
static void asf_reset_header(AVFormatContext *s)
994
{
995
    ASFContext *asf = s->priv_data;
996
    ASFStream *asf_st;
997
    int i;
998

    
999
    asf->packet_nb_frames = 0;
1000
    asf->packet_size_left = 0;
1001
    asf->packet_segments = 0;
1002
    asf->packet_flags = 0;
1003
    asf->packet_property = 0;
1004
    asf->packet_timestamp = 0;
1005
    asf->packet_segsizetype = 0;
1006
    asf->packet_segments = 0;
1007
    asf->packet_seq = 0;
1008
    asf->packet_replic_size = 0;
1009
    asf->packet_key_frame = 0;
1010
    asf->packet_padsize = 0;
1011
    asf->packet_frag_offset = 0;
1012
    asf->packet_frag_size = 0;
1013
    asf->packet_frag_timestamp = 0;
1014
    asf->packet_multi_size = 0;
1015
    asf->packet_obj_size = 0;
1016
    asf->packet_time_delta = 0;
1017
    asf->packet_time_start = 0;
1018

    
1019
    for(i=0; i<s->nb_streams; i++){
1020
        asf_st= s->streams[i]->priv_data;
1021
        av_free_packet(&asf_st->pkt);
1022
        asf_st->frag_offset=0;
1023
        asf_st->seq=0;
1024
    }
1025
    asf->asf_st= NULL;
1026
}
1027

    
1028
static int asf_read_close(AVFormatContext *s)
1029
{
1030
    int i;
1031

    
1032
    asf_reset_header(s);
1033
    for(i=0;i<s->nb_streams;i++) {
1034
        AVStream *st = s->streams[i];
1035
        av_free(st->codec->palctrl);
1036
    }
1037
    return 0;
1038
}
1039

    
1040
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1041
{
1042
    AVPacket pkt1, *pkt = &pkt1;
1043
    ASFStream *asf_st;
1044
    int64_t pts;
1045
    int64_t pos= *ppos;
1046
    int i;
1047
    int64_t start_pos[ASF_MAX_STREAMS];
1048

    
1049
    for(i=0; i<s->nb_streams; i++){
1050
        start_pos[i]= pos;
1051
    }
1052

    
1053
    if (s->packet_size > 0)
1054
        pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1055
    *ppos= pos;
1056
    url_fseek(s->pb, pos, SEEK_SET);
1057

    
1058
//printf("asf_read_pts\n");
1059
    asf_reset_header(s);
1060
    for(;;){
1061
        if (av_read_frame(s, pkt) < 0){
1062
            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1063
            return AV_NOPTS_VALUE;
1064
        }
1065

    
1066
        pts= pkt->pts;
1067

    
1068
        av_free_packet(pkt);
1069
        if(pkt->flags&AV_PKT_FLAG_KEY){
1070
            i= pkt->stream_index;
1071

    
1072
            asf_st= s->streams[i]->priv_data;
1073

    
1074
//            assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1075
            pos= asf_st->packet_pos;
1076

    
1077
            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1078
            start_pos[i]= asf_st->packet_pos + 1;
1079

    
1080
            if(pkt->stream_index == stream_index)
1081
               break;
1082
        }
1083
    }
1084

    
1085
    *ppos= pos;
1086
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1087

    
1088
    return pts;
1089
}
1090

    
1091
static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1092
{
1093
    ff_asf_guid g;
1094
    ASFContext *asf = s->priv_data;
1095
    int64_t current_pos= url_ftell(s->pb);
1096
    int i;
1097

    
1098
    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1099
    ff_get_guid(s->pb, &g);
1100

    
1101
    /* the data object can be followed by other top-level objects,
1102
       skip them until the simple index object is reached */
1103
    while (ff_guidcmp(&g, &index_guid)) {
1104
        int64_t gsize= get_le64(s->pb);
1105
        if (gsize < 24 || url_feof(s->pb)) {
1106
            url_fseek(s->pb, current_pos, SEEK_SET);
1107
            return;
1108
        }
1109
        url_fseek(s->pb, gsize-24, SEEK_CUR);
1110
        ff_get_guid(s->pb, &g);
1111
    }
1112

    
1113
    {
1114
        int64_t itime, last_pos=-1;
1115
        int pct, ict;
1116
        int64_t av_unused gsize= get_le64(s->pb);
1117
        ff_get_guid(s->pb, &g);
1118
        itime=get_le64(s->pb);
1119
        pct=get_le32(s->pb);
1120
        ict=get_le32(s->pb);
1121
        av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1122

    
1123
        for (i=0;i<ict;i++){
1124
            int pktnum=get_le32(s->pb);
1125
            int pktct =get_le16(s->pb);
1126
            int64_t pos      = s->data_offset + s->packet_size*(int64_t)pktnum;
1127
            int64_t index_pts= av_rescale(itime, i, 10000);
1128

    
1129
            if(pos != last_pos){
1130
            av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1131
            av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1132
            last_pos=pos;
1133
            }
1134
        }
1135
        asf->index_read= 1;
1136
    }
1137
    url_fseek(s->pb, current_pos, SEEK_SET);
1138
}
1139

    
1140
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1141
{
1142
    ASFContext *asf = s->priv_data;
1143
    AVStream *st = s->streams[stream_index];
1144
    int64_t pos;
1145
    int index;
1146

    
1147
    if (s->packet_size <= 0)
1148
        return -1;
1149

    
1150
    /* Try using the protocol's read_seek if available */
1151
    if(s->pb) {
1152
        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1153
        if(ret >= 0)
1154
            asf_reset_header(s);
1155
        if (ret != AVERROR(ENOSYS))
1156
            return ret;
1157
    }
1158

    
1159
    if (!asf->index_read)
1160
        asf_build_simple_index(s, stream_index);
1161

    
1162
    if(!(asf->index_read && st->index_entries)){
1163
        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1164
            return -1;
1165
    }else{
1166
        index= av_index_search_timestamp(st, pts, flags);
1167
        if(index<0)
1168
            return -1;
1169

    
1170
        /* find the position */
1171
        pos = st->index_entries[index].pos;
1172

    
1173
    // various attempts to find key frame have failed so far
1174
    //    asf_reset_header(s);
1175
    //    url_fseek(s->pb, pos, SEEK_SET);
1176
    //    key_pos = pos;
1177
    //     for(i=0;i<16;i++){
1178
    //         pos = url_ftell(s->pb);
1179
    //         if (av_read_frame(s, &pkt) < 0){
1180
    //             av_log(s, AV_LOG_INFO, "seek failed\n");
1181
    //             return -1;
1182
    //         }
1183
    //         asf_st = s->streams[stream_index]->priv_data;
1184
    //         pos += st->parser->frame_offset;
1185
    //
1186
    //         if (pkt.size > b) {
1187
    //             b = pkt.size;
1188
    //             key_pos = pos;
1189
    //         }
1190
    //
1191
    //         av_free_packet(&pkt);
1192
    //     }
1193

    
1194
        /* do the seek */
1195
        av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1196
        url_fseek(s->pb, pos, SEEK_SET);
1197
    }
1198
    asf_reset_header(s);
1199
    return 0;
1200
}
1201

    
1202
AVInputFormat ff_asf_demuxer = {
1203
    "asf",
1204
    NULL_IF_CONFIG_SMALL("ASF format"),
1205
    sizeof(ASFContext),
1206
    asf_probe,
1207
    asf_read_header,
1208
    asf_read_packet,
1209
    asf_read_close,
1210
    asf_read_seek,
1211
    asf_read_pts,
1212
};