git.sesse.net Git - ffmpeg/blob - 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
  22 #include "libavutil/common.h"
  23 #include "libavcodec/mpegaudio.h"
  24 #include "avformat.h"
  25 #include "riff.h"
  26 #include "asf.h"
  27 #include "asfcrypt.h"
  28
  29 void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
  30
  31 #undef NDEBUG
  32 #include <assert.h>
  33
  34 #define FRAME_HEADER_SIZE 17
  35 // Fix Me! FRAME_HEADER_SIZE may be different.
  36
  37 static const GUID index_guid = {
  38     0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
  39 };
  40
  41 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
  42     0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
  43 };
  44 /**********************************/
  45 /* decoding */
  46
  47 //#define DEBUG
  48
  49 #ifdef DEBUG
  50 #define PRINT_IF_GUID(g,cmp) \
  51 if (!memcmp(g, &cmp, sizeof(GUID))) \
  52     dprintf(NULL, "(GUID: %s) ", #cmp)
  53
  54 static void print_guid(const GUID *g)
  55 {
  56     int i;
  57     PRINT_IF_GUID(g, asf_header);
  58     else PRINT_IF_GUID(g, file_header);
  59     else PRINT_IF_GUID(g, stream_header);
  60     else PRINT_IF_GUID(g, audio_stream);
  61     else PRINT_IF_GUID(g, audio_conceal_none);
  62     else PRINT_IF_GUID(g, video_stream);
  63     else PRINT_IF_GUID(g, video_conceal_none);
  64     else PRINT_IF_GUID(g, command_stream);
  65     else PRINT_IF_GUID(g, comment_header);
  66     else PRINT_IF_GUID(g, codec_comment_header);
  67     else PRINT_IF_GUID(g, codec_comment1_header);
  68     else PRINT_IF_GUID(g, data_header);
  69     else PRINT_IF_GUID(g, index_guid);
  70     else PRINT_IF_GUID(g, head1_guid);
  71     else PRINT_IF_GUID(g, head2_guid);
  72     else PRINT_IF_GUID(g, my_guid);
  73     else PRINT_IF_GUID(g, ext_stream_header);
  74     else PRINT_IF_GUID(g, extended_content_header);
  75     else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
  76     else PRINT_IF_GUID(g, ext_stream_audio_stream);
  77     else PRINT_IF_GUID(g, metadata_header);
  78     else PRINT_IF_GUID(g, stream_bitrate_guid);
  79     else
  80         dprintf(NULL, "(GUID: unknown) ");
  81     for(i=0;i<16;i++)
  82         dprintf(NULL, " 0x%02x,", (*g)[i]);
  83     dprintf(NULL, "}\n");
  84 }
  85 #undef PRINT_IF_GUID
  86 #else
  87 #define print_guid(g)
  88 #endif
  89
  90 static void get_guid(ByteIOContext *s, GUID *g)
  91 {
  92     assert(sizeof(*g) == 16);
  93     get_buffer(s, *g, sizeof(*g));
  94 }
  95
  96 #if 0
  97 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
  98 {
  99     int len, c;
 100     char *q;
 101
 102     len = get_le16(pb);
 103     q = buf;
 104     while (len > 0) {
 105         c = get_le16(pb);
 106         if ((q - buf) < buf_size - 1)
 107             *q++ = c;
 108         len--;
 109     }
 110     *q = '\0';
 111 }
 112 #endif
 113
 114 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
 115 {
 116     char* q = buf;
 117     len /= 2;
 118     while (len--) {
 119         uint8_t tmp;
 120         PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
 121     }
 122     *q = '\0';
 123 }
 124
 125 static int asf_probe(AVProbeData *pd)
 126 {
 127     /* check file header */
 128     if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
 129         return AVPROBE_SCORE_MAX;
 130     else
 131         return 0;
 132 }
 133
 134 static int get_value(ByteIOContext *pb, int type){
 135     switch(type){
 136         case 2: return get_le32(pb);
 137         case 3: return get_le32(pb);
 138         case 4: return get_le64(pb);
 139         case 5: return get_le16(pb);
 140         default:return INT_MIN;
 141     }
 142 }
 143
 144 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
 145 {
 146     ASFContext *asf = s->priv_data;
 147     GUID g;
 148     ByteIOContext *pb = s->pb;
 149     AVStream *st;
 150     ASFStream *asf_st;
 151     int size, i;
 152     int64_t gsize;
 153     AVRational dar[128];
 154     uint32_t bitrate[128];
 155
 156     memset(dar, 0, sizeof(dar));
 157     memset(bitrate, 0, sizeof(bitrate));
 158
 159     get_guid(pb, &g);
 160     if (memcmp(&g, &asf_header, sizeof(GUID)))
 161         return -1;
 162     get_le64(pb);
 163     get_le32(pb);
 164     get_byte(pb);
 165     get_byte(pb);
 166     memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
 167     for(;;) {
 168         get_guid(pb, &g);
 169         gsize = get_le64(pb);
 170         dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
 171         print_guid(&g);
 172         dprintf(s, "  size=0x%"PRIx64"\n", gsize);
 173         if (!memcmp(&g, &data_header, sizeof(GUID))) {
 174             asf->data_object_offset = url_ftell(pb);
 175             // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
 176             if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
 177                 asf->data_object_size = gsize - 24;
 178             } else {
 179                 asf->data_object_size = (uint64_t)-1;
 180             }
 181             break;
 182         }
 183         if (gsize < 24)
 184             return -1;
 185         if (!memcmp(&g, &file_header, sizeof(GUID))) {
 186             get_guid(pb, &asf->hdr.guid);
 187             asf->hdr.file_size          = get_le64(pb);
 188             asf->hdr.create_time        = get_le64(pb);
 189             asf->nb_packets             = get_le64(pb);
 190             asf->hdr.play_time          = get_le64(pb);
 191             asf->hdr.send_time          = get_le64(pb);
 192             asf->hdr.preroll            = get_le32(pb);
 193             asf->hdr.ignore             = get_le32(pb);
 194             asf->hdr.flags              = get_le32(pb);
 195             asf->hdr.min_pktsize        = get_le32(pb);
 196             asf->hdr.max_pktsize        = get_le32(pb);
 197             asf->hdr.max_bitrate        = get_le32(pb);
 198             asf->packet_size = asf->hdr.max_pktsize;
 199         } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
 200             enum CodecType type;
 201             int type_specific_size, sizeX;
 202             uint64_t total_size;
 203             unsigned int tag1;
 204             int64_t pos1, pos2, start_time;
 205             int test_for_ext_stream_audio, is_dvr_ms_audio=0;
 206
 207             pos1 = url_ftell(pb);
 208
 209             st = av_new_stream(s, 0);
 210             if (!st)
 211                 return AVERROR(ENOMEM);
 212             av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
 213             asf_st = av_mallocz(sizeof(ASFStream));
 214             if (!asf_st)
 215                 return AVERROR(ENOMEM);
 216             st->priv_data = asf_st;
 217             start_time = asf->hdr.preroll;
 218
 219             if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
 220                 st->duration = asf->hdr.send_time /
 221                     (10000000 / 1000) - start_time;
 222             }
 223             get_guid(pb, &g);
 224
 225             test_for_ext_stream_audio = 0;
 226             if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
 227                 type = CODEC_TYPE_AUDIO;
 228             } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
 229                 type = CODEC_TYPE_VIDEO;
 230             } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
 231                 type = CODEC_TYPE_DATA;
 232             } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
 233                 test_for_ext_stream_audio = 1;
 234                 type = CODEC_TYPE_UNKNOWN;
 235             } else {
 236                 return -1;
 237             }
 238             get_guid(pb, &g);
 239             total_size = get_le64(pb);
 240             type_specific_size = get_le32(pb);
 241             get_le32(pb);
 242             st->id = get_le16(pb) & 0x7f; /* stream id */
 243             // mapping of asf ID to AV stream ID;
 244             asf->asfid2avid[st->id] = s->nb_streams - 1;
 245
 246             get_le32(pb);
 247
 248             if (test_for_ext_stream_audio) {
 249                 get_guid(pb, &g);
 250                 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
 251                     type = CODEC_TYPE_AUDIO;
 252                     is_dvr_ms_audio=1;
 253                     get_guid(pb, &g);
 254                     get_le32(pb);
 255                     get_le32(pb);
 256                     get_le32(pb);
 257                     get_guid(pb, &g);
 258                     get_le32(pb);
 259                 }
 260             }
 261
 262             st->codec->codec_type = type;
 263             if (type == CODEC_TYPE_AUDIO) {
 264                 get_wav_header(pb, st->codec, type_specific_size);
 265                 if (is_dvr_ms_audio) {
 266                     // codec_id and codec_tag are unreliable in dvr_ms
 267                     // files. Set them later by probing stream.
 268                     st->codec->codec_id = CODEC_ID_PROBE;
 269                     st->codec->codec_tag = 0;
 270                 }
 271                 st->need_parsing = AVSTREAM_PARSE_FULL;
 272                 /* We have to init the frame size at some point .... */
 273                 pos2 = url_ftell(pb);
 274                 if (gsize >= (pos2 + 8 - pos1 + 24)) {
 275                     asf_st->ds_span = get_byte(pb);
 276                     asf_st->ds_packet_size = get_le16(pb);
 277                     asf_st->ds_chunk_size = get_le16(pb);
 278                     get_le16(pb); //ds_data_size
 279                     get_byte(pb); //ds_silence_data
 280                 }
 281                 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
 282                 //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
 283                 //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
 284                 if (asf_st->ds_span > 1) {
 285                     if (!asf_st->ds_chunk_size
 286                         || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
 287                         || asf_st->ds_packet_size % asf_st->ds_chunk_size)
 288                         asf_st->ds_span = 0; // disable descrambling
 289                 }
 290                 switch (st->codec->codec_id) {
 291                 case CODEC_ID_MP3:
 292                     st->codec->frame_size = MPA_FRAME_SIZE;
 293                     break;
 294                 case CODEC_ID_PCM_S16LE:
 295                 case CODEC_ID_PCM_S16BE:
 296                 case CODEC_ID_PCM_U16LE:
 297                 case CODEC_ID_PCM_U16BE:
 298                 case CODEC_ID_PCM_S8:
 299                 case CODEC_ID_PCM_U8:
 300                 case CODEC_ID_PCM_ALAW:
 301                 case CODEC_ID_PCM_MULAW:
 302                     st->codec->frame_size = 1;
 303                     break;
 304                 default:
 305                     /* This is probably wrong, but it prevents a crash later */
 306                     st->codec->frame_size = 1;
 307                     break;
 308                 }
 309             } else if (type == CODEC_TYPE_VIDEO) {
 310                 get_le32(pb);
 311                 get_le32(pb);
 312                 get_byte(pb);
 313                 size = get_le16(pb); /* size */
 314                 sizeX= get_le32(pb); /* size */
 315                 st->codec->width = get_le32(pb);
 316                 st->codec->height = get_le32(pb);
 317                 /* not available for asf */
 318                 get_le16(pb); /* panes */
 319                 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
 320                 tag1 = get_le32(pb);
 321                 url_fskip(pb, 20);
 322 //                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
 323                 size= sizeX;
 324                 if (size > 40) {
 325                     st->codec->extradata_size = size - 40;
 326                     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 327                     get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
 328                 }
 329
 330         /* Extract palette from extradata if bpp <= 8 */
 331         /* This code assumes that extradata contains only palette */
 332         /* This is true for all paletted codecs implemented in ffmpeg */
 333         if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
 334             st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
 335 #ifdef WORDS_BIGENDIAN
 336             for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
 337                 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
 338 #else
 339             memcpy(st->codec->palctrl->palette, st->codec->extradata,
 340                    FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
 341 #endif
 342             st->codec->palctrl->palette_changed = 1;
 343         }
 344
 345                 st->codec->codec_tag = tag1;
 346                 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
 347                 if(tag1 == MKTAG('D', 'V', 'R', ' '))
 348                     st->need_parsing = AVSTREAM_PARSE_FULL;
 349             }
 350             pos2 = url_ftell(pb);
 351             url_fskip(pb, gsize - (pos2 - pos1 + 24));
 352         } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
 353             int len1, len2, len3, len4, len5;
 354
 355             len1 = get_le16(pb);
 356             len2 = get_le16(pb);
 357             len3 = get_le16(pb);
 358             len4 = get_le16(pb);
 359             len5 = get_le16(pb);
 360             get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
 361             get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
 362             get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
 363             get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
 364             url_fskip(pb, len5);
 365         } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
 366             int stream_count = get_le16(pb);
 367             int j;
 368
 369 //            av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
 370 //            av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
 371             for(j = 0; j < stream_count; j++) {
 372                 int flags, bitrate, stream_id;
 373
 374                 flags= get_le16(pb);
 375                 bitrate= get_le32(pb);
 376                 stream_id= (flags & 0x7f);
 377 //                av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
 378                 asf->stream_bitrates[stream_id]= bitrate;
 379             }
 380        } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
 381                 int desc_count, i;
 382
 383                 desc_count = get_le16(pb);
 384                 for(i=0;i<desc_count;i++)
 385                 {
 386                         int name_len,value_type,value_len;
 387                         uint64_t value_num = 0;
 388                         char name[1024];
 389
 390                         name_len = get_le16(pb);
 391                         get_str16_nolen(pb, name_len, name, sizeof(name));
 392                         value_type = get_le16(pb);
 393                         value_len = get_le16(pb);
 394                         if (value_type <= 1) // unicode or byte
 395                         {
 396                                 if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
 397                                 else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
 398                                 else if(!strcmp(name,"WM/Year"      )) {
 399                                     char year[8];
 400                                     get_str16_nolen(pb, value_len, year, sizeof(year));
 401                                     s->year = atoi(year);
 402                                 }
 403                                 else if(!strcmp(name,"WM/Track") && s->track == 0) {
 404                                     char track[8];
 405                                     get_str16_nolen(pb, value_len, track, sizeof(track));
 406                                     s->track = strtol(track, NULL, 10) + 1;
 407                                 }
 408                                 else if(!strcmp(name,"WM/TrackNumber")) {
 409                                     char track[8];
 410                                     get_str16_nolen(pb, value_len, track, sizeof(track));
 411                                     s->track = strtol(track, NULL, 10);
 412                                 }
 413                                 else url_fskip(pb, value_len);
 414                         }
 415                         else if (value_type <= 5) // boolean or DWORD or QWORD or WORD
 416                         {
 417                                 value_num= get_value(pb, value_type);
 418                                 if (!strcmp(name,"WM/Track"      ) && s->track == 0) s->track = value_num + 1;
 419                                 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
 420                         }else
 421                             url_fskip(pb, value_len);
 422                 }
 423         } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
 424             int n, stream_num, name_len, value_len, value_type, value_num;
 425             n = get_le16(pb);
 426
 427             for(i=0;i<n;i++) {
 428                 char name[1024];
 429
 430                 get_le16(pb); //lang_list_index
 431                 stream_num= get_le16(pb);
 432                 name_len=   get_le16(pb);
 433                 value_type= get_le16(pb);
 434                 value_len=  get_le32(pb);
 435
 436                 get_str16_nolen(pb, name_len, name, sizeof(name));
 437 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
 438                 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
 439                 url_fskip(pb, value_len - 2);
 440
 441                 if(stream_num<128){
 442                     if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
 443                     else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
 444                 }
 445             }
 446         } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
 447             int ext_len, payload_ext_ct, stream_ct;
 448             uint32_t ext_d, leak_rate, stream_num;
 449             int64_t pos_ex_st;
 450             pos_ex_st = url_ftell(pb);
 451
 452             get_le64(pb); // starttime
 453             get_le64(pb); // endtime
 454             leak_rate = get_le32(pb); // leak-datarate
 455             get_le32(pb); // bucket-datasize
 456             get_le32(pb); // init-bucket-fullness
 457             get_le32(pb); // alt-leak-datarate
 458             get_le32(pb); // alt-bucket-datasize
 459             get_le32(pb); // alt-init-bucket-fullness
 460             get_le32(pb); // max-object-size
 461             get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
 462             stream_num = get_le16(pb); // stream-num
 463             get_le16(pb); // stream-language-id-index
 464             get_le64(pb); // avg frametime in 100ns units
 465             stream_ct = get_le16(pb); //stream-name-count
 466             payload_ext_ct = get_le16(pb); //payload-extension-system-count
 467
 468             if (stream_num < 128)
 469                 bitrate[stream_num] = leak_rate;
 470
 471             for (i=0; i<stream_ct; i++){
 472                 get_le16(pb);
 473                 ext_len = get_le16(pb);
 474                 url_fseek(pb, ext_len, SEEK_CUR);
 475             }
 476
 477             for (i=0; i<payload_ext_ct; i++){
 478                 get_guid(pb, &g);
 479                 ext_d=get_le16(pb);
 480                 ext_len=get_le32(pb);
 481                 url_fseek(pb, ext_len, SEEK_CUR);
 482             }
 483
 484             // there could be a optional stream properties object to follow
 485             // if so the next iteration will pick it up
 486         } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
 487             int v1, v2;
 488             get_guid(pb, &g);
 489             v1 = get_le32(pb);
 490             v2 = get_le16(pb);
 491 #if 0
 492         } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
 493             int len, v1, n, num;
 494             char str[256], *q;
 495             char tag[16];
 496
 497             get_guid(pb, &g);
 498             print_guid(&g);
 499
 500             n = get_le32(pb);
 501             for(i=0;i<n;i++) {
 502                 num = get_le16(pb); /* stream number */
 503                 get_str16(pb, str, sizeof(str));
 504                 get_str16(pb, str, sizeof(str));
 505                 len = get_le16(pb);
 506                 q = tag;
 507                 while (len > 0) {
 508                     v1 = get_byte(pb);
 509                     if ((q - tag) < sizeof(tag) - 1)
 510                         *q++ = v1;
 511                     len--;
 512                 }
 513                 *q = '\0';
 514             }
 515 #endif
 516         } else if (url_feof(pb)) {
 517             return -1;
 518         } else {
 519             url_fseek(pb, gsize - 24, SEEK_CUR);
 520         }
 521     }
 522     get_guid(pb, &g);
 523     get_le64(pb);
 524     get_byte(pb);
 525     get_byte(pb);
 526     if (url_feof(pb))
 527         return -1;
 528     asf->data_offset = url_ftell(pb);
 529     asf->packet_size_left = 0;
 530
 531
 532     for(i=0; i<128; i++){
 533         int stream_num= asf->asfid2avid[i];
 534         if(stream_num>=0){
 535             AVStream *st = s->streams[stream_num];
 536             if (!st->codec->bit_rate)
 537                 st->codec->bit_rate = bitrate[i];
 538             if (dar[i].num > 0 && dar[i].den > 0)
 539                 av_reduce(&st->sample_aspect_ratio.num,
 540                           &st->sample_aspect_ratio.den,
 541                           dar[i].num, dar[i].den, INT_MAX);
 542 //av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
 543         }
 544     }
 545
 546     return 0;
 547 }
 548
 549 #define DO_2BITS(bits, var, defval) \
 550     switch (bits & 3) \
 551     { \
 552     case 3: var = get_le32(pb); rsize += 4; break; \
 553     case 2: var = get_le16(pb); rsize += 2; break; \
 554     case 1: var = get_byte(pb); rsize++; break; \
 555     default: var = defval; break; \
 556     }
 557
 558 int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
 559 {
 560     ASFContext *asf = s->priv_data;
 561     uint32_t packet_length, padsize;
 562     int rsize = 8;
 563     int c, d, e, off;
 564
 565     off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
 566
 567     c=d=e=-1;
 568     while(off-- > 0){
 569         c=d; d=e;
 570         e= get_byte(pb);
 571         if(c == 0x82 && !d && !e)
 572             break;
 573     }
 574
 575     if (c != 0x82) {
 576         if (!url_feof(pb))
 577             av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
 578     }
 579     if ((c & 0x8f) == 0x82) {
 580         if (d || e) {
 581             if (!url_feof(pb))
 582                 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
 583             return -1;
 584         }
 585         c= get_byte(pb);
 586         d= get_byte(pb);
 587         rsize+=3;
 588     }else{
 589         url_fseek(pb, -1, SEEK_CUR); //FIXME
 590     }
 591
 592     asf->packet_flags    = c;
 593     asf->packet_property = d;
 594
 595     DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
 596     DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
 597     DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
 598
 599     //the following checks prevent overflows and infinite loops
 600     if(packet_length >= (1U<<29)){
 601         av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
 602         return -1;
 603     }
 604     if(padsize >= packet_length){
 605         av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
 606         return -1;
 607     }
 608
 609     asf->packet_timestamp = get_le32(pb);
 610     get_le16(pb); /* duration */
 611     // rsize has at least 11 bytes which have to be present
 612
 613     if (asf->packet_flags & 0x01) {
 614         asf->packet_segsizetype = get_byte(pb); rsize++;
 615         asf->packet_segments = asf->packet_segsizetype & 0x3f;
 616     } else {
 617         asf->packet_segments = 1;
 618         asf->packet_segsizetype = 0x80;
 619     }
 620     asf->packet_size_left = packet_length - padsize - rsize;
 621     if (packet_length < asf->hdr.min_pktsize)
 622         padsize += asf->hdr.min_pktsize - packet_length;
 623     asf->packet_padsize = padsize;
 624     dprintf(s, "packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
 625     return 0;
 626 }
 627
 628 /**
 629  *
 630  * @return <0 if error
 631  */
 632 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
 633     ASFContext *asf = s->priv_data;
 634     int rsize = 1;
 635     int num = get_byte(pb);
 636     int64_t ts0, ts1;
 637
 638     asf->packet_segments--;
 639     asf->packet_key_frame = num >> 7;
 640     asf->stream_index = asf->asfid2avid[num & 0x7f];
 641     // sequence should be ignored!
 642     DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
 643     DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
 644     DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
 645 //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);
 646     if (asf->packet_replic_size >= 8) {
 647         asf->packet_obj_size = get_le32(pb);
 648         if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
 649             av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
 650             return -1;
 651         }
 652         asf->packet_frag_timestamp = get_le32(pb); // timestamp
 653         if(asf->packet_replic_size >= 8+38+4){
 654 //            for(i=0; i<asf->packet_replic_size-8; i++)
 655 //                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
 656 //            av_log(s, AV_LOG_DEBUG, "\n");
 657             url_fskip(pb, 10);
 658             ts0= get_le64(pb);
 659             ts1= get_le64(pb);
 660             url_fskip(pb, 12);
 661             get_le32(pb);
 662             url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
 663             if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
 664             else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
 665         }else
 666             url_fskip(pb, asf->packet_replic_size - 8);
 667         rsize += asf->packet_replic_size; // FIXME - check validity
 668     } else if (asf->packet_replic_size==1){
 669         // multipacket - frag_offset is beginning timestamp
 670         asf->packet_time_start = asf->packet_frag_offset;
 671         asf->packet_frag_offset = 0;
 672         asf->packet_frag_timestamp = asf->packet_timestamp;
 673
 674         asf->packet_time_delta = get_byte(pb);
 675         rsize++;
 676     }else if(asf->packet_replic_size!=0){
 677         av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
 678         return -1;
 679     }
 680     if (asf->packet_flags & 0x01) {
 681         DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
 682         if(asf->packet_frag_size > asf->packet_size_left - rsize){
 683             av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
 684             return -1;
 685         }
 686         //printf("Fragsize %d\n", asf->packet_frag_size);
 687     } else {
 688         asf->packet_frag_size = asf->packet_size_left - rsize;
 689         //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
 690     }
 691     if (asf->packet_replic_size == 1) {
 692         asf->packet_multi_size = asf->packet_frag_size;
 693         if (asf->packet_multi_size > asf->packet_size_left)
 694             return -1;
 695     }
 696     asf->packet_size_left -= rsize;
 697     //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
 698
 699     return 0;
 700 }
 701
 702 int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
 703 {
 704     ASFContext *asf = s->priv_data;
 705     ASFStream *asf_st = 0;
 706     for (;;) {
 707         if(url_feof(pb))
 708             return AVERROR(EIO);
 709         if (asf->packet_size_left < FRAME_HEADER_SIZE
 710             || asf->packet_segments < 1) {
 711             //asf->packet_size_left <= asf->packet_padsize) {
 712             int ret = asf->packet_size_left + asf->packet_padsize;
 713             //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
 714             assert(ret>=0);
 715             /* fail safe */
 716             url_fskip(pb, ret);
 717
 718             asf->packet_pos= url_ftell(pb);
 719             if (asf->data_object_size != (uint64_t)-1 &&
 720                 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
 721                 return AVERROR(EIO); /* Do not exceed the size of the data object */
 722             return 1;
 723         }
 724         if (asf->packet_time_start == 0) {
 725             if(asf_read_frame_header(s, pb) < 0){
 726                 asf->packet_segments= 0;
 727                 continue;
 728             }
 729             if (asf->stream_index < 0
 730                 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
 731                 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
 732                 ) {
 733                 asf->packet_time_start = 0;
 734                 /* unhandled packet (should not happen) */
 735                 url_fskip(pb, asf->packet_frag_size);
 736                 asf->packet_size_left -= asf->packet_frag_size;
 737                 if(asf->stream_index < 0)
 738                     av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
 739                 continue;
 740             }
 741             asf->asf_st = s->streams[asf->stream_index]->priv_data;
 742         }
 743         asf_st = asf->asf_st;
 744
 745         if (asf->packet_replic_size == 1) {
 746             // frag_offset is here used as the beginning timestamp
 747             asf->packet_frag_timestamp = asf->packet_time_start;
 748             asf->packet_time_start += asf->packet_time_delta;
 749             asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
 750             asf->packet_size_left--;
 751             asf->packet_multi_size--;
 752             if (asf->packet_multi_size < asf->packet_obj_size)
 753             {
 754                 asf->packet_time_start = 0;
 755                 url_fskip(pb, asf->packet_multi_size);
 756                 asf->packet_size_left -= asf->packet_multi_size;
 757                 continue;
 758             }
 759             asf->packet_multi_size -= asf->packet_obj_size;
 760             //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);
 761         }
 762         if(   /*asf->packet_frag_size == asf->packet_obj_size*/
 763               asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
 764            && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
 765             av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
 766                 asf_st->frag_offset, asf->packet_frag_size,
 767                 asf->packet_obj_size, asf_st->pkt.size);
 768             asf->packet_obj_size= asf_st->pkt.size;
 769         }
 770
 771         if (   asf_st->pkt.size != asf->packet_obj_size
 772             || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
 773             if(asf_st->pkt.data){
 774                 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
 775                 asf_st->frag_offset = 0;
 776                 av_free_packet(&asf_st->pkt);
 777             }
 778             /* new packet */
 779             av_new_packet(&asf_st->pkt, asf->packet_obj_size);
 780             asf_st->seq = asf->packet_seq;
 781             asf_st->pkt.dts = asf->packet_frag_timestamp;
 782             asf_st->pkt.stream_index = asf->stream_index;
 783             asf_st->pkt.pos =
 784             asf_st->packet_pos= asf->packet_pos;
 785 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
 786 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
 787 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
 788             if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
 789                 asf->packet_key_frame = 1;
 790             if (asf->packet_key_frame)
 791                 asf_st->pkt.flags |= PKT_FLAG_KEY;
 792         }
 793
 794         /* read data */
 795         //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
 796         //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
 797         //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
 798         asf->packet_size_left -= asf->packet_frag_size;
 799         if (asf->packet_size_left < 0)
 800             continue;
 801
 802         if(   asf->packet_frag_offset >= asf_st->pkt.size
 803            || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
 804             av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
 805                 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
 806             continue;
 807         }
 808
 809         get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
 810                    asf->packet_frag_size);
 811         if (s->key && s->keylen == 20)
 812             ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
 813                             asf->packet_frag_size);
 814         asf_st->frag_offset += asf->packet_frag_size;
 815         /* test if whole packet is read */
 816         if (asf_st->frag_offset == asf_st->pkt.size) {
 817             //workaround for macroshit radio DVR-MS files
 818             if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
 819                && asf_st->pkt.size > 100){
 820                 int i;
 821                 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
 822                 if(i == asf_st->pkt.size){
 823                     av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
 824                     asf_st->frag_offset = 0;
 825                     av_free_packet(&asf_st->pkt);
 826                     continue;
 827                 }
 828             }
 829
 830             /* return packet */
 831             if (asf_st->ds_span > 1) {
 832               if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
 833                     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);
 834               }else{
 835                 /* packet descrambling */
 836                 uint8_t *newdata = av_malloc(asf_st->pkt.size);
 837                 if (newdata) {
 838                     int offset = 0;
 839                     while (offset < asf_st->pkt.size) {
 840                         int off = offset / asf_st->ds_chunk_size;
 841                         int row = off / asf_st->ds_span;
 842                         int col = off % asf_st->ds_span;
 843                         int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
 844                         //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
 845
 846                         assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
 847                         assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
 848                         memcpy(newdata + offset,
 849                                asf_st->pkt.data + idx * asf_st->ds_chunk_size,
 850                                asf_st->ds_chunk_size);
 851                         offset += asf_st->ds_chunk_size;
 852                     }
 853                     av_free(asf_st->pkt.data);
 854                     asf_st->pkt.data = newdata;
 855                 }
 856               }
 857             }
 858             asf_st->frag_offset = 0;
 859             *pkt= asf_st->pkt;
 860             //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
 861             asf_st->pkt.size = 0;
 862             asf_st->pkt.data = 0;
 863             break; // packet completed
 864         }
 865     }
 866     return 0;
 867 }
 868
 869 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
 870 {
 871     ASFContext *asf = s->priv_data;
 872
 873     for (;;) {
 874         int ret;
 875
 876         /* parse cached packets, if any */
 877         if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
 878             return ret;
 879         if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
 880             assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
 881         asf->packet_time_start = 0;
 882     }
 883
 884     return 0;
 885 }
 886
 887 // Added to support seeking after packets have been read
 888 // If information is not reset, read_packet fails due to
 889 // leftover information from previous reads
 890 static void asf_reset_header(AVFormatContext *s)
 891 {
 892     ASFContext *asf = s->priv_data;
 893     ASFStream *asf_st;
 894     int i;
 895
 896     asf->packet_nb_frames = 0;
 897     asf->packet_size_left = 0;
 898     asf->packet_segments = 0;
 899     asf->packet_flags = 0;
 900     asf->packet_property = 0;
 901     asf->packet_timestamp = 0;
 902     asf->packet_segsizetype = 0;
 903     asf->packet_segments = 0;
 904     asf->packet_seq = 0;
 905     asf->packet_replic_size = 0;
 906     asf->packet_key_frame = 0;
 907     asf->packet_padsize = 0;
 908     asf->packet_frag_offset = 0;
 909     asf->packet_frag_size = 0;
 910     asf->packet_frag_timestamp = 0;
 911     asf->packet_multi_size = 0;
 912     asf->packet_obj_size = 0;
 913     asf->packet_time_delta = 0;
 914     asf->packet_time_start = 0;
 915
 916     for(i=0; i<s->nb_streams; i++){
 917         asf_st= s->streams[i]->priv_data;
 918         av_free_packet(&asf_st->pkt);
 919         asf_st->frag_offset=0;
 920         asf_st->seq=0;
 921     }
 922     asf->asf_st= NULL;
 923 }
 924
 925 static int asf_read_close(AVFormatContext *s)
 926 {
 927     int i;
 928
 929     asf_reset_header(s);
 930     for(i=0;i<s->nb_streams;i++) {
 931         AVStream *st = s->streams[i];
 932         av_free(st->codec->palctrl);
 933     }
 934     return 0;
 935 }
 936
 937 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
 938 {
 939     ASFContext *asf = s->priv_data;
 940     AVPacket pkt1, *pkt = &pkt1;
 941     ASFStream *asf_st;
 942     int64_t pts;
 943     int64_t pos= *ppos;
 944     int i;
 945     int64_t start_pos[s->nb_streams];
 946
 947     for(i=0; i<s->nb_streams; i++){
 948         start_pos[i]= pos;
 949     }
 950
 951     pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
 952     *ppos= pos;
 953     url_fseek(s->pb, pos, SEEK_SET);
 954
 955 //printf("asf_read_pts\n");
 956     asf_reset_header(s);
 957     for(;;){
 958         if (av_read_frame(s, pkt) < 0){
 959             av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
 960             return AV_NOPTS_VALUE;
 961         }
 962
 963         pts= pkt->pts;
 964
 965         av_free_packet(pkt);
 966         if(pkt->flags&PKT_FLAG_KEY){
 967             i= pkt->stream_index;
 968
 969             asf_st= s->streams[i]->priv_data;
 970
 971 //            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
 972             pos= asf_st->packet_pos;
 973
 974             av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
 975             start_pos[i]= asf_st->packet_pos + 1;
 976
 977             if(pkt->stream_index == stream_index)
 978                break;
 979         }
 980     }
 981
 982     *ppos= pos;
 983 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
 984
 985     return pts;
 986 }
 987
 988 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
 989 {
 990     GUID g;
 991     ASFContext *asf = s->priv_data;
 992     int64_t gsize, itime;
 993     int64_t pos, current_pos, index_pts;
 994     int i;
 995     int pct,ict;
 996
 997     current_pos = url_ftell(s->pb);
 998
 999     url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1000     get_guid(s->pb, &g);
1001     if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1002         gsize = get_le64(s->pb);
1003         get_guid(s->pb, &g);
1004         itime=get_le64(s->pb);
1005         pct=get_le32(s->pb);
1006         ict=get_le32(s->pb);
1007         av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1008
1009         for (i=0;i<ict;i++){
1010             int pktnum=get_le32(s->pb);
1011             int pktct =get_le16(s->pb);
1012             av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1013
1014             pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1015             index_pts=av_rescale(itime, i, 10000);
1016
1017             av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1018         }
1019         asf->index_read= 1;
1020     }
1021     url_fseek(s->pb, current_pos, SEEK_SET);
1022 }
1023
1024 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1025 {
1026     ASFContext *asf = s->priv_data;
1027     AVStream *st = s->streams[stream_index];
1028     int64_t pos;
1029     int index;
1030
1031     if (asf->packet_size <= 0)
1032         return -1;
1033
1034     /* Try using the protocol's read_seek if available */
1035     if(s->pb) {
1036         int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1037         if(ret >= 0)
1038             asf_reset_header(s);
1039         if (ret != AVERROR(ENOSYS))
1040             return ret;
1041     }
1042
1043     if (!asf->index_read)
1044         asf_build_simple_index(s, stream_index);
1045
1046     if(!(asf->index_read && st->index_entries)){
1047         if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1048             return -1;
1049     }else{
1050         index= av_index_search_timestamp(st, pts, flags);
1051         if(index<0)
1052             return -1;
1053
1054         /* find the position */
1055         pos = st->index_entries[index].pos;
1056         pts = st->index_entries[index].timestamp;
1057
1058     // various attempts to find key frame have failed so far
1059     //    asf_reset_header(s);
1060     //    url_fseek(s->pb, pos, SEEK_SET);
1061     //    key_pos = pos;
1062     //     for(i=0;i<16;i++){
1063     //         pos = url_ftell(s->pb);
1064     //         if (av_read_frame(s, &pkt) < 0){
1065     //             av_log(s, AV_LOG_INFO, "seek failed\n");
1066     //             return -1;
1067     //         }
1068     //         asf_st = s->streams[stream_index]->priv_data;
1069     //         pos += st->parser->frame_offset;
1070     //
1071     //         if (pkt.size > b) {
1072     //             b = pkt.size;
1073     //             key_pos = pos;
1074     //         }
1075     //
1076     //         av_free_packet(&pkt);
1077     //     }
1078
1079         /* do the seek */
1080         av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1081         url_fseek(s->pb, pos, SEEK_SET);
1082     }
1083     asf_reset_header(s);
1084     return 0;
1085 }
1086
1087 AVInputFormat asf_demuxer = {
1088     "asf",
1089     NULL_IF_CONFIG_SMALL("ASF format"),
1090     sizeof(ASFContext),
1091     asf_probe,
1092     asf_read_header,
1093     asf_read_packet,
1094     asf_read_close,
1095     asf_read_seek,
1096     asf_read_pts,
1097 };