libavformat/asf.c

   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
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21 #include "avformat.h"
  22 #include "riff.h"
  23 #include "mpegaudio.h"
  24 #include "asf.h"
  25 #include "common.h"
  26 #include "asfcrypt.h"
  27
  28 extern void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
  29
  30 #undef NDEBUG
  31 #include <assert.h>
  32
  33 #define FRAME_HEADER_SIZE 17
  34 // Fix Me! FRAME_HEADER_SIZE may be different.
  35
  36 static const GUID index_guid = {
  37     0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
  38 };
  39
  40 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
  41     0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
  42 };
  43 /**********************************/
  44 /* decoding */
  45
  46 //#define DEBUG
  47
  48 #ifdef DEBUG
  49 #define PRINT_IF_GUID(g,cmp) \
  50 if (!memcmp(g, &cmp, sizeof(GUID))) \
  51     printf("(GUID: %s) ", #cmp)
  52
  53 static void print_guid(const GUID *g)
  54 {
  55     int i;
  56     PRINT_IF_GUID(g, asf_header);
  57     else PRINT_IF_GUID(g, file_header);
  58     else PRINT_IF_GUID(g, stream_header);
  59     else PRINT_IF_GUID(g, audio_stream);
  60     else PRINT_IF_GUID(g, audio_conceal_none);
  61     else PRINT_IF_GUID(g, video_stream);
  62     else PRINT_IF_GUID(g, video_conceal_none);
  63     else PRINT_IF_GUID(g, command_stream);
  64     else PRINT_IF_GUID(g, comment_header);
  65     else PRINT_IF_GUID(g, codec_comment_header);
  66     else PRINT_IF_GUID(g, codec_comment1_header);
  67     else PRINT_IF_GUID(g, data_header);
  68     else PRINT_IF_GUID(g, index_guid);
  69     else PRINT_IF_GUID(g, head1_guid);
  70     else PRINT_IF_GUID(g, head2_guid);
  71     else PRINT_IF_GUID(g, my_guid);
  72     else PRINT_IF_GUID(g, ext_stream_header);
  73     else PRINT_IF_GUID(g, extended_content_header);
  74     else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
  75     else PRINT_IF_GUID(g, ext_stream_audio_stream);
  76     else PRINT_IF_GUID(g, metadata_header);
  77     else PRINT_IF_GUID(g, stream_bitrate_guid);
  78     else
  79         printf("(GUID: unknown) ");
  80     for(i=0;i<16;i++)
  81         printf(" 0x%02x,", (*g)[i]);
  82     printf("}\n");
  83 }
  84 #undef PRINT_IF_GUID
  85 #endif
  86
  87 static void get_guid(ByteIOContext *s, GUID *g)
  88 {
  89     assert(sizeof(*g) == 16);
  90     get_buffer(s, g, sizeof(*g));
  91 }
  92
  93 #if 0
  94 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
  95 {
  96     int len, c;
  97     char *q;
  98
  99     len = get_le16(pb);
 100     q = buf;
 101     while (len > 0) {
 102         c = get_le16(pb);
 103         if ((q - buf) < buf_size - 1)
 104             *q++ = c;
 105         len--;
 106     }
 107     *q = '\0';
 108 }
 109 #endif
 110
 111 static int is_mms(ByteIOContext *pb)
 112 {
 113     return url_fileno(pb) && url_fileno(pb)->prot &&
 114          !strcmp(url_fileno(pb)->prot->name, "mmsh");
 115 }
 116
 117 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
 118 {
 119     char* q = buf;
 120     len /= 2;
 121     while (len--) {
 122         uint8_t tmp;
 123         PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
 124     }
 125     *q = '\0';
 126 }
 127
 128 static int asf_probe(AVProbeData *pd)
 129 {
 130     /* check file header */
 131     if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
 132         return AVPROBE_SCORE_MAX;
 133     else
 134         return 0;
 135 }
 136
 137 static int get_value(ByteIOContext *pb, int type){
 138     switch(type){
 139         case 2: return get_le32(pb);
 140         case 3: return get_le32(pb);
 141         case 4: return get_le64(pb);
 142         case 5: return get_le16(pb);
 143         default:return INT_MIN;
 144     }
 145 }
 146
 147 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
 148 {
 149     ASFContext *asf = s->priv_data;
 150     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     get_guid(pb, &g);
 163     if (memcmp(&g, &asf_header, sizeof(GUID)))
 164         goto fail;
 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         get_guid(pb, &g);
 172         gsize = get_le64(pb);
 173 #ifdef DEBUG
 174         printf("%08"PRIx64": ", url_ftell(pb) - 24);
 175         print_guid(&g);
 176         printf("  size=0x%"PRIx64"\n", gsize);
 177 #endif
 178         if (!memcmp(&g, &data_header, sizeof(GUID))) {
 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             goto fail;
 190         if (!memcmp(&g, &file_header, sizeof(GUID))) {
 191             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.send_time          = get_le64(pb);
 196             asf->hdr.play_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             asf->packet_size = asf->hdr.max_pktsize;
 204         } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
 205             int type, type_specific_size, sizeX;
 206             uint64_t total_size;
 207             unsigned int tag1;
 208             int64_t pos1, pos2, start_time;
 209             int test_for_ext_stream_audio, is_dvr_ms_audio=0;
 210
 211             pos1 = url_ftell(pb);
 212
 213             st = av_new_stream(s, 0);
 214             if (!st)
 215                 goto fail;
 216             av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
 217             asf_st = av_mallocz(sizeof(ASFStream));
 218             if (!asf_st)
 219                 goto fail;
 220             st->priv_data = asf_st;
 221             start_time = asf->hdr.preroll;
 222
 223             if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
 224                 st->duration = asf->hdr.send_time /
 225                     (10000000 / 1000) - start_time;
 226             }
 227             get_guid(pb, &g);
 228
 229             test_for_ext_stream_audio = 0;
 230             if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
 231                 type = CODEC_TYPE_AUDIO;
 232             } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
 233                 type = CODEC_TYPE_VIDEO;
 234             } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
 235                 type = CODEC_TYPE_UNKNOWN;
 236             } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
 237                 test_for_ext_stream_audio = 1;
 238                 type = CODEC_TYPE_UNKNOWN;
 239             } else {
 240                 goto fail;
 241             }
 242             get_guid(pb, &g);
 243             total_size = get_le64(pb);
 244             type_specific_size = get_le32(pb);
 245             get_le32(pb);
 246             st->id = get_le16(pb) & 0x7f; /* stream id */
 247             // mapping of asf ID to AV stream ID;
 248             asf->asfid2avid[st->id] = s->nb_streams - 1;
 249
 250             get_le32(pb);
 251
 252             if (test_for_ext_stream_audio) {
 253                 get_guid(pb, &g);
 254                 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
 255                     type = CODEC_TYPE_AUDIO;
 256                     is_dvr_ms_audio=1;
 257                     get_guid(pb, &g);
 258                     get_le32(pb);
 259                     get_le32(pb);
 260                     get_le32(pb);
 261                     get_guid(pb, &g);
 262                     get_le32(pb);
 263                 }
 264             }
 265
 266             st->codec->codec_type = type;
 267             if (type == CODEC_TYPE_AUDIO) {
 268                 get_wav_header(pb, st->codec, type_specific_size);
 269                 if (is_dvr_ms_audio) {
 270                     // codec_id and codec_tag are unreliable in dvr_ms
 271                     // files. Set them later by probing stream.
 272                     st->codec->codec_id = CODEC_ID_NONE;
 273                     st->codec->codec_tag = 0;
 274                 }
 275                 st->need_parsing = AVSTREAM_PARSE_FULL;
 276                 /* We have to init the frame size at some point .... */
 277                 pos2 = url_ftell(pb);
 278                 if (gsize >= (pos2 + 8 - pos1 + 24)) {
 279                     asf_st->ds_span = get_byte(pb);
 280                     asf_st->ds_packet_size = get_le16(pb);
 281                     asf_st->ds_chunk_size = get_le16(pb);
 282                     get_le16(pb); //ds_data_size
 283                     get_byte(pb); //ds_silence_data
 284                 }
 285                 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
 286                 //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
 287                 //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
 288                 if (asf_st->ds_span > 1) {
 289                     if (!asf_st->ds_chunk_size
 290                         || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
 291                         || asf_st->ds_packet_size % asf_st->ds_chunk_size)
 292                         asf_st->ds_span = 0; // disable descrambling
 293                 }
 294                 switch (st->codec->codec_id) {
 295                 case CODEC_ID_MP3:
 296                     st->codec->frame_size = MPA_FRAME_SIZE;
 297                     break;
 298                 case CODEC_ID_PCM_S16LE:
 299                 case CODEC_ID_PCM_S16BE:
 300                 case CODEC_ID_PCM_U16LE:
 301                 case CODEC_ID_PCM_U16BE:
 302                 case CODEC_ID_PCM_S8:
 303                 case CODEC_ID_PCM_U8:
 304                 case CODEC_ID_PCM_ALAW:
 305                 case CODEC_ID_PCM_MULAW:
 306                     st->codec->frame_size = 1;
 307                     break;
 308                 default:
 309                     /* This is probably wrong, but it prevents a crash later */
 310                     st->codec->frame_size = 1;
 311                     break;
 312                 }
 313             } else if (type == CODEC_TYPE_VIDEO) {
 314                 get_le32(pb);
 315                 get_le32(pb);
 316                 get_byte(pb);
 317                 size = get_le16(pb); /* size */
 318                 sizeX= get_le32(pb); /* size */
 319                 st->codec->width = get_le32(pb);
 320                 st->codec->height = get_le32(pb);
 321                 /* not available for asf */
 322                 get_le16(pb); /* panes */
 323                 st->codec->bits_per_sample = get_le16(pb); /* depth */
 324                 tag1 = get_le32(pb);
 325                 url_fskip(pb, 20);
 326 //                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
 327                 size= sizeX;
 328                 if (size > 40) {
 329                     st->codec->extradata_size = size - 40;
 330                     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 331                     get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
 332                 }
 333
 334         /* Extract palette from extradata if bpp <= 8 */
 335         /* This code assumes that extradata contains only palette */
 336         /* This is true for all paletted codecs implemented in ffmpeg */
 337         if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
 338             st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
 339 #ifdef WORDS_BIGENDIAN
 340             for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
 341                 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
 342 #else
 343             memcpy(st->codec->palctrl->palette, st->codec->extradata,
 344                    FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
 345 #endif
 346             st->codec->palctrl->palette_changed = 1;
 347         }
 348
 349                 st->codec->codec_tag = tag1;
 350                 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
 351                 if(tag1 == MKTAG('D', 'V', 'R', ' '))
 352                     st->need_parsing = AVSTREAM_PARSE_FULL;
 353             }
 354             pos2 = url_ftell(pb);
 355             url_fskip(pb, gsize - (pos2 - pos1 + 24));
 356         } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
 357             int len1, len2, len3, len4, len5;
 358
 359             len1 = get_le16(pb);
 360             len2 = get_le16(pb);
 361             len3 = get_le16(pb);
 362             len4 = get_le16(pb);
 363             len5 = get_le16(pb);
 364             get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
 365             get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
 366             get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
 367             get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
 368             url_fskip(pb, len5);
 369         } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
 370             int stream_count = get_le16(pb);
 371             int j;
 372
 373 //            av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
 374 //            av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
 375             for(j = 0; j < stream_count; j++) {
 376                 int flags, bitrate, stream_id;
 377
 378                 flags= get_le16(pb);
 379                 bitrate= get_le32(pb);
 380                 stream_id= (flags & 0x7f);
 381 //                av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
 382                 asf->stream_bitrates[stream_id]= bitrate;
 383             }
 384        } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
 385                 int desc_count, i;
 386
 387                 desc_count = get_le16(pb);
 388                 for(i=0;i<desc_count;i++)
 389                 {
 390                         int name_len,value_type,value_len;
 391                         uint64_t value_num = 0;
 392                         char name[1024];
 393
 394                         name_len = get_le16(pb);
 395                         get_str16_nolen(pb, name_len, name, sizeof(name));
 396                         value_type = get_le16(pb);
 397                         value_len = get_le16(pb);
 398                         if ((value_type == 0) || (value_type == 1)) // unicode or byte
 399                         {
 400                                 if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
 401                                 else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
 402                                 else if(!strcmp(name,"WM/Track") && s->track == 0) {
 403                                     char track[8];
 404                                     get_str16_nolen(pb, value_len, track, sizeof(track));
 405                                     s->track = strtol(track, NULL, 10) + 1;
 406                                 }
 407                                 else if(!strcmp(name,"WM/TrackNumber")) {
 408                                     char track[8];
 409                                     get_str16_nolen(pb, value_len, track, sizeof(track));
 410                                     s->track = strtol(track, NULL, 10);
 411                                 }
 412                                 else url_fskip(pb, value_len);
 413                         }
 414                         if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
 415                         {
 416                                 value_num= get_value(pb, value_type);
 417                                 if (!strcmp(name,"WM/Track"      ) && s->track == 0) s->track = value_num + 1;
 418                                 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
 419                         }
 420                 }
 421         } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
 422             int n, stream_num, name_len, value_len, value_type, value_num;
 423             n = get_le16(pb);
 424
 425             for(i=0;i<n;i++) {
 426                 char name[1024];
 427
 428                 get_le16(pb); //lang_list_index
 429                 stream_num= get_le16(pb);
 430                 name_len=   get_le16(pb);
 431                 value_type= get_le16(pb);
 432                 value_len=  get_le32(pb);
 433
 434                 get_str16_nolen(pb, name_len, name, sizeof(name));
 435 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
 436                 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
 437                 url_fskip(pb, value_len - 2);
 438
 439                 if(stream_num<128){
 440                     if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
 441                     else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
 442                 }
 443             }
 444         } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
 445             int ext_len, payload_ext_ct, stream_ct;
 446             uint32_t ext_d, leak_rate, stream_num;
 447             int64_t pos_ex_st;
 448             pos_ex_st = url_ftell(pb);
 449
 450             get_le64(pb); // starttime
 451             get_le64(pb); // endtime
 452             leak_rate = get_le32(pb); // leak-datarate
 453             get_le32(pb); // bucket-datasize
 454             get_le32(pb); // init-bucket-fullness
 455             get_le32(pb); // alt-leak-datarate
 456             get_le32(pb); // alt-bucket-datasize
 457             get_le32(pb); // alt-init-bucket-fullness
 458             get_le32(pb); // max-object-size
 459             get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
 460             stream_num = get_le16(pb); // stream-num
 461             get_le16(pb); // stream-language-id-index
 462             get_le64(pb); // avg frametime in 100ns units
 463             stream_ct = get_le16(pb); //stream-name-count
 464             payload_ext_ct = get_le16(pb); //payload-extension-system-count
 465
 466             if (stream_num < 128)
 467                 bitrate[stream_num] = leak_rate;
 468
 469             for (i=0; i<stream_ct; i++){
 470                 get_le16(pb);
 471                 ext_len = get_le16(pb);
 472                 url_fseek(pb, ext_len, SEEK_CUR);
 473             }
 474
 475             for (i=0; i<payload_ext_ct; i++){
 476                 get_guid(pb, &g);
 477                 ext_d=get_le16(pb);
 478                 ext_len=get_le32(pb);
 479                 url_fseek(pb, ext_len, SEEK_CUR);
 480             }
 481
 482             // there could be a optional stream properties object to follow
 483             // if so the next iteration will pick it up
 484         } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
 485             int v1, v2;
 486             get_guid(pb, &g);
 487             v1 = get_le32(pb);
 488             v2 = get_le16(pb);
 489 #if 0
 490         } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
 491             int len, v1, n, num;
 492             char str[256], *q;
 493             char tag[16];
 494
 495             get_guid(pb, &g);
 496             print_guid(&g);
 497
 498             n = get_le32(pb);
 499             for(i=0;i<n;i++) {
 500                 num = get_le16(pb); /* stream number */
 501                 get_str16(pb, str, sizeof(str));
 502                 get_str16(pb, str, sizeof(str));
 503                 len = get_le16(pb);
 504                 q = tag;
 505                 while (len > 0) {
 506                     v1 = get_byte(pb);
 507                     if ((q - tag) < sizeof(tag) - 1)
 508                         *q++ = v1;
 509                     len--;
 510                 }
 511                 *q = '\0';
 512             }
 513 #endif
 514         } else if (url_feof(pb)) {
 515             goto fail;
 516         } else {
 517             url_fseek(pb, gsize - 24, SEEK_CUR);
 518         }
 519     }
 520     get_guid(pb, &g);
 521     get_le64(pb);
 522     get_byte(pb);
 523     get_byte(pb);
 524     if (url_feof(pb))
 525         goto fail;
 526     asf->data_offset = url_ftell(pb);
 527     asf->packet_size_left = 0;
 528
 529
 530     for(i=0; i<128; i++){
 531         int stream_num= asf->asfid2avid[i];
 532         if(stream_num>=0){
 533             AVCodecContext *codec= s->streams[stream_num]->codec;
 534             if (!codec->bit_rate)
 535                 codec->bit_rate = bitrate[i];
 536             if (dar[i].num > 0 && dar[i].den > 0)
 537                 av_reduce(&codec->sample_aspect_ratio.num,
 538                           &codec->sample_aspect_ratio.den,
 539                           dar[i].num, dar[i].den, INT_MAX);
 540 //av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
 541         }
 542     }
 543
 544 #ifdef CONFIG_MMSH_PROTOCOL
 545     /* Give info about ourselves to the mms protocol */
 546     if(is_mms(pb))
 547         ff_mms_set_stream_selection(url_fileno(pb), s);
 548 #endif
 549
 550     return 0;
 551
 552  fail:
 553      for(i=0;i<s->nb_streams;i++) {
 554         AVStream *st = s->streams[i];
 555         if (st) {
 556             av_free(st->priv_data);
 557             av_free(st->codec->extradata);
 558         }
 559         av_free(st);
 560     }
 561     return -1;
 562 }
 563
 564 #define DO_2BITS(bits, var, defval) \
 565     switch (bits & 3) \
 566     { \
 567     case 3: var = get_le32(pb); rsize += 4; break; \
 568     case 2: var = get_le16(pb); rsize += 2; break; \
 569     case 1: var = get_byte(pb); rsize++; break; \
 570     default: var = defval; break; \
 571     }
 572
 573 /**
 574  *
 575  * @return <0 in case of an error
 576  */
 577 static int asf_get_packet(AVFormatContext *s)
 578 {
 579     ASFContext *asf = s->priv_data;
 580     ByteIOContext *pb = &s->pb;
 581     uint32_t packet_length, padsize;
 582     int rsize = 8;
 583     int c, d, e, off;
 584
 585     off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
 586
 587     c=d=e=-1;
 588     while(off-- > 0){
 589         c=d; d=e;
 590         e= get_byte(pb);
 591         if(c == 0x82 && !d && !e)
 592             break;
 593     }
 594
 595     if (c != 0x82) {
 596         if (!url_feof(pb))
 597             av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
 598     }
 599     if ((c & 0x8f) == 0x82) {
 600         if (d || e) {
 601             if (!url_feof(pb))
 602                 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
 603             return -1;
 604         }
 605         c= get_byte(pb);
 606         d= get_byte(pb);
 607         rsize+=3;
 608     }else{
 609         url_fseek(pb, -1, SEEK_CUR); //FIXME
 610     }
 611
 612     asf->packet_flags    = c;
 613     asf->packet_property = d;
 614
 615     DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
 616     DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
 617     DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
 618
 619     //the following checks prevent overflows and infinite loops
 620     if(packet_length >= (1U<<29)){
 621         av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
 622         return -1;
 623     }
 624     if(padsize >= packet_length){
 625         av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
 626         return -1;
 627     }
 628
 629     asf->packet_timestamp = get_le32(pb);
 630     get_le16(pb); /* duration */
 631     // rsize has at least 11 bytes which have to be present
 632
 633     if (asf->packet_flags & 0x01) {
 634         asf->packet_segsizetype = get_byte(pb); rsize++;
 635         asf->packet_segments = asf->packet_segsizetype & 0x3f;
 636     } else {
 637         asf->packet_segments = 1;
 638         asf->packet_segsizetype = 0x80;
 639     }
 640     asf->packet_size_left = packet_length - padsize - rsize;
 641     if (packet_length < asf->hdr.min_pktsize)
 642         padsize += asf->hdr.min_pktsize - packet_length;
 643     asf->packet_padsize = padsize;
 644 #ifdef DEBUG
 645     printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
 646 #endif
 647     return 0;
 648 }
 649
 650 /**
 651  *
 652  * @return <0 if error
 653  */
 654 static int asf_read_frame_header(AVFormatContext *s){
 655     ASFContext *asf = s->priv_data;
 656     ByteIOContext *pb = &s->pb;
 657     int rsize = 1;
 658     int num = get_byte(pb);
 659     int64_t ts0, ts1;
 660
 661     asf->packet_segments--;
 662     asf->packet_key_frame = num >> 7;
 663     asf->stream_index = asf->asfid2avid[num & 0x7f];
 664     // sequence should be ignored!
 665     DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
 666     DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
 667     DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
 668 //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);
 669     if (asf->packet_replic_size >= 8) {
 670         asf->packet_obj_size = get_le32(pb);
 671         if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
 672             av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
 673             return -1;
 674         }
 675         asf->packet_frag_timestamp = get_le32(pb); // timestamp
 676         if(asf->packet_replic_size >= 8+38+4){
 677 //            for(i=0; i<asf->packet_replic_size-8; i++)
 678 //                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
 679 //            av_log(s, AV_LOG_DEBUG, "\n");
 680             url_fskip(pb, 10);
 681             ts0= get_le64(pb);
 682             ts1= get_le64(pb);
 683             url_fskip(pb, 12);
 684             get_le32(pb);
 685             url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
 686             if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
 687             else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
 688         }else
 689             url_fskip(pb, asf->packet_replic_size - 8);
 690         rsize += asf->packet_replic_size; // FIXME - check validity
 691     } else if (asf->packet_replic_size==1){
 692         // multipacket - frag_offset is begining timestamp
 693         asf->packet_time_start = asf->packet_frag_offset;
 694         asf->packet_frag_offset = 0;
 695         asf->packet_frag_timestamp = asf->packet_timestamp;
 696
 697         asf->packet_time_delta = get_byte(pb);
 698         rsize++;
 699     }else if(asf->packet_replic_size!=0){
 700         av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
 701         return -1;
 702     }
 703     if (asf->packet_flags & 0x01) {
 704         DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
 705         if(asf->packet_frag_size > asf->packet_size_left - rsize){
 706             av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
 707             return -1;
 708         }
 709         //printf("Fragsize %d\n", asf->packet_frag_size);
 710     } else {
 711         asf->packet_frag_size = asf->packet_size_left - rsize;
 712         //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
 713     }
 714     if (asf->packet_replic_size == 1) {
 715         asf->packet_multi_size = asf->packet_frag_size;
 716         if (asf->packet_multi_size > asf->packet_size_left)
 717             return -1;
 718     }
 719     asf->packet_size_left -= rsize;
 720     //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
 721
 722     return 0;
 723 }
 724
 725 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
 726 {
 727     ASFContext *asf = s->priv_data;
 728     ASFStream *asf_st = 0;
 729     ByteIOContext *pb = &s->pb;
 730     //static int pc = 0;
 731     for (;;) {
 732         if(url_feof(pb))
 733             return AVERROR(EIO);
 734         if (asf->packet_size_left < FRAME_HEADER_SIZE
 735             || asf->packet_segments < 1) {
 736             //asf->packet_size_left <= asf->packet_padsize) {
 737             int ret = asf->packet_size_left + asf->packet_padsize;
 738             //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
 739             assert(ret>=0);
 740             /* fail safe */
 741             url_fskip(pb, ret);
 742
 743             asf->packet_pos= url_ftell(&s->pb);
 744             if (asf->data_object_size != (uint64_t)-1 &&
 745                 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
 746                 return AVERROR(EIO); /* Do not exceed the size of the data object */
 747             ret = asf_get_packet(s);
 748             //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
 749             if (ret < 0)
 750                 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
 751             asf->packet_time_start = 0;
 752             continue;
 753         }
 754         if (asf->packet_time_start == 0) {
 755             if(asf_read_frame_header(s) < 0){
 756                 asf->packet_segments= 0;
 757                 continue;
 758             }
 759             if (asf->stream_index < 0
 760                 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
 761                 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
 762                 ) {
 763                 asf->packet_time_start = 0;
 764                 /* unhandled packet (should not happen) */
 765                 url_fskip(pb, asf->packet_frag_size);
 766                 asf->packet_size_left -= asf->packet_frag_size;
 767                 if(asf->stream_index < 0)
 768                     av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
 769                 continue;
 770             }
 771             asf->asf_st = s->streams[asf->stream_index]->priv_data;
 772         }
 773         asf_st = asf->asf_st;
 774
 775         if (asf->packet_replic_size == 1) {
 776             // frag_offset is here used as the begining timestamp
 777             asf->packet_frag_timestamp = asf->packet_time_start;
 778             asf->packet_time_start += asf->packet_time_delta;
 779             asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
 780             asf->packet_size_left--;
 781             asf->packet_multi_size--;
 782             if (asf->packet_multi_size < asf->packet_obj_size)
 783             {
 784                 asf->packet_time_start = 0;
 785                 url_fskip(pb, asf->packet_multi_size);
 786                 asf->packet_size_left -= asf->packet_multi_size;
 787                 continue;
 788             }
 789             asf->packet_multi_size -= asf->packet_obj_size;
 790             //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);
 791         }
 792         if(   /*asf->packet_frag_size == asf->packet_obj_size*/
 793               asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
 794            && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
 795             av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
 796                 asf_st->frag_offset, asf->packet_frag_size,
 797                 asf->packet_obj_size, asf_st->pkt.size);
 798             asf->packet_obj_size= asf_st->pkt.size;
 799         }
 800
 801         if (   asf_st->pkt.size != asf->packet_obj_size
 802             || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
 803             if(asf_st->pkt.data){
 804                 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
 805                 asf_st->frag_offset = 0;
 806                 av_free_packet(&asf_st->pkt);
 807             }
 808             /* new packet */
 809             av_new_packet(&asf_st->pkt, asf->packet_obj_size);
 810             asf_st->seq = asf->packet_seq;
 811             asf_st->pkt.pts = asf->packet_frag_timestamp;
 812             asf_st->pkt.stream_index = asf->stream_index;
 813             asf_st->pkt.pos =
 814             asf_st->packet_pos= asf->packet_pos;
 815 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
 816 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
 817 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
 818             if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
 819                 asf->packet_key_frame = 1;
 820             if (asf->packet_key_frame)
 821                 asf_st->pkt.flags |= PKT_FLAG_KEY;
 822         }
 823
 824         /* read data */
 825         //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
 826         //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
 827         //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
 828         asf->packet_size_left -= asf->packet_frag_size;
 829         if (asf->packet_size_left < 0)
 830             continue;
 831
 832         if(   asf->packet_frag_offset >= asf_st->pkt.size
 833            || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
 834             av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
 835                 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
 836             continue;
 837         }
 838
 839         get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
 840                    asf->packet_frag_size);
 841         if (s->key && s->keylen == 20)
 842             ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
 843                             asf->packet_frag_size);
 844         asf_st->frag_offset += asf->packet_frag_size;
 845         /* test if whole packet is read */
 846         if (asf_st->frag_offset == asf_st->pkt.size) {
 847             //workaround for macroshit radio DVR-MS files
 848             if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
 849                && asf_st->pkt.size > 100){
 850                 int i;
 851                 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
 852                 if(i == asf_st->pkt.size){
 853                     av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
 854                     asf_st->frag_offset = 0;
 855                     av_free_packet(&asf_st->pkt);
 856                     continue;
 857                 }
 858             }
 859
 860             /* return packet */
 861             if (asf_st->ds_span > 1) {
 862               if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
 863                     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);
 864               }else{
 865                 /* packet descrambling */
 866                 uint8_t *newdata = av_malloc(asf_st->pkt.size);
 867                 if (newdata) {
 868                     int offset = 0;
 869                     while (offset < asf_st->pkt.size) {
 870                         int off = offset / asf_st->ds_chunk_size;
 871                         int row = off / asf_st->ds_span;
 872                         int col = off % asf_st->ds_span;
 873                         int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
 874                         //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
 875
 876                         assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
 877                         assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
 878                         memcpy(newdata + offset,
 879                                asf_st->pkt.data + idx * asf_st->ds_chunk_size,
 880                                asf_st->ds_chunk_size);
 881                         offset += asf_st->ds_chunk_size;
 882                     }
 883                     av_free(asf_st->pkt.data);
 884                     asf_st->pkt.data = newdata;
 885                 }
 886               }
 887             }
 888             asf_st->frag_offset = 0;
 889             *pkt= asf_st->pkt;
 890             //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
 891             asf_st->pkt.size = 0;
 892             asf_st->pkt.data = 0;
 893             break; // packet completed
 894         }
 895     }
 896     return 0;
 897 }
 898
 899 // Added to support seeking after packets have been read
 900 // If information is not reset, read_packet fails due to
 901 // leftover information from previous reads
 902 static void asf_reset_header(AVFormatContext *s)
 903 {
 904     ASFContext *asf = s->priv_data;
 905     ASFStream *asf_st;
 906     int i;
 907
 908     asf->packet_nb_frames = 0;
 909     asf->packet_size_left = 0;
 910     asf->packet_segments = 0;
 911     asf->packet_flags = 0;
 912     asf->packet_property = 0;
 913     asf->packet_timestamp = 0;
 914     asf->packet_segsizetype = 0;
 915     asf->packet_segments = 0;
 916     asf->packet_seq = 0;
 917     asf->packet_replic_size = 0;
 918     asf->packet_key_frame = 0;
 919     asf->packet_padsize = 0;
 920     asf->packet_frag_offset = 0;
 921     asf->packet_frag_size = 0;
 922     asf->packet_frag_timestamp = 0;
 923     asf->packet_multi_size = 0;
 924     asf->packet_obj_size = 0;
 925     asf->packet_time_delta = 0;
 926     asf->packet_time_start = 0;
 927
 928     for(i=0; i<s->nb_streams; i++){
 929         asf_st= s->streams[i]->priv_data;
 930         av_free_packet(&asf_st->pkt);
 931         asf_st->frag_offset=0;
 932         asf_st->seq=0;
 933     }
 934     asf->asf_st= NULL;
 935 }
 936
 937 static int asf_read_close(AVFormatContext *s)
 938 {
 939     int i;
 940
 941     asf_reset_header(s);
 942     for(i=0;i<s->nb_streams;i++) {
 943         AVStream *st = s->streams[i];
 944         av_free(st->priv_data);
 945         av_free(st->codec->palctrl);
 946     }
 947     return 0;
 948 }
 949
 950 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
 951 {
 952     ASFContext *asf = s->priv_data;
 953     AVPacket pkt1, *pkt = &pkt1;
 954     ASFStream *asf_st;
 955     int64_t pts;
 956     int64_t pos= *ppos;
 957     int i;
 958     int64_t start_pos[s->nb_streams];
 959
 960     for(i=0; i<s->nb_streams; i++){
 961         start_pos[i]= pos;
 962     }
 963
 964     pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
 965     *ppos= pos;
 966     url_fseek(&s->pb, pos, SEEK_SET);
 967
 968 //printf("asf_read_pts\n");
 969     asf_reset_header(s);
 970     for(;;){
 971         if (av_read_frame(s, pkt) < 0){
 972             av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
 973             return AV_NOPTS_VALUE;
 974         }
 975
 976         pts= pkt->pts;
 977
 978         av_free_packet(pkt);
 979         if(pkt->flags&PKT_FLAG_KEY){
 980             i= pkt->stream_index;
 981
 982             asf_st= s->streams[i]->priv_data;
 983
 984 //            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
 985             pos= asf_st->packet_pos;
 986
 987             av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
 988             start_pos[i]= asf_st->packet_pos + 1;
 989
 990             if(pkt->stream_index == stream_index)
 991                break;
 992         }
 993     }
 994
 995     *ppos= pos;
 996 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
 997
 998     return pts;
 999 }
1000
1001 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1002 {
1003     GUID g;
1004     ASFContext *asf = s->priv_data;
1005     int64_t gsize, itime;
1006     int64_t pos, current_pos, index_pts;
1007     int i;
1008     int pct,ict;
1009
1010     current_pos = url_ftell(&s->pb);
1011
1012     url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1013     get_guid(&s->pb, &g);
1014     if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1015         gsize = get_le64(&s->pb);
1016         get_guid(&s->pb, &g);
1017         itime=get_le64(&s->pb);
1018         pct=get_le32(&s->pb);
1019         ict=get_le32(&s->pb);
1020         av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1021
1022         for (i=0;i<ict;i++){
1023             int pktnum=get_le32(&s->pb);
1024             int pktct =get_le16(&s->pb);
1025             av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1026
1027             pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1028             index_pts=av_rescale(itime, i, 10000);
1029
1030             av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1031         }
1032         asf->index_read= 1;
1033     }
1034     url_fseek(&s->pb, current_pos, SEEK_SET);
1035 }
1036
1037 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1038 {
1039     ASFContext *asf = s->priv_data;
1040     AVStream *st = s->streams[stream_index];
1041     int64_t pos;
1042     int index;
1043
1044     if (asf->packet_size <= 0)
1045         return -1;
1046
1047     if (!asf->index_read)
1048         asf_build_simple_index(s, stream_index);
1049
1050     if(!(asf->index_read && st->index_entries)){
1051         if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1052             return -1;
1053     }else{
1054         index= av_index_search_timestamp(st, pts, flags);
1055         if(index<0)
1056             return -1;
1057
1058         /* find the position */
1059         pos = st->index_entries[index].pos;
1060         pts = st->index_entries[index].timestamp;
1061
1062     // various attempts to find key frame have failed so far
1063     //    asf_reset_header(s);
1064     //    url_fseek(&s->pb, pos, SEEK_SET);
1065     //    key_pos = pos;
1066     //     for(i=0;i<16;i++){
1067     //         pos = url_ftell(&s->pb);
1068     //         if (av_read_frame(s, &pkt) < 0){
1069     //             av_log(s, AV_LOG_INFO, "seek failed\n");
1070     //             return -1;
1071     //         }
1072     //         asf_st = s->streams[stream_index]->priv_data;
1073     //         pos += st->parser->frame_offset;
1074     //
1075     //         if (pkt.size > b) {
1076     //             b = pkt.size;
1077     //             key_pos = pos;
1078     //         }
1079     //
1080     //         av_free_packet(&pkt);
1081     //     }
1082
1083         /* do the seek */
1084         av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1085         url_fseek(&s->pb, pos, SEEK_SET);
1086     }
1087     asf_reset_header(s);
1088     return 0;
1089 }
1090
1091 AVInputFormat asf_demuxer = {
1092     "asf",
1093     "asf format",
1094     sizeof(ASFContext),
1095     asf_probe,
1096     asf_read_header,
1097     asf_read_packet,
1098     asf_read_close,
1099     asf_read_seek,
1100     asf_read_pts,
1101 };