libmpdemux/demux_asf.c

   1 //  ASF file parser for DEMUXER v0.3  by A'rpi/ESP-team
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6
   7 #include "config.h"
   8 #include "mp_msg.h"
   9 #include "help_mp.h"
  10
  11 #include "stream/stream.h"
  12 #include "asf.h"
  13 #include "demuxer.h"
  14
  15 #include "libvo/fastmemcpy.h"
  16 #include "libavutil/intreadwrite.h"
  17
  18 // defined at asfheader.c:
  19
  20 extern int asf_check_header(demuxer_t *demuxer);
  21 extern int read_asf_header(demuxer_t *demuxer,struct asf_priv* asf);
  22
  23 // based on asf file-format doc by Eugene [http://divx.euro.ru]
  24
  25 /**
  26  * \brief reads int stored in number of bytes given by len
  27  * \param ptr pointer to read from, is incremented appropriately
  28  * \param len lowest 2 bits indicate number of bytes to read
  29  * \param def default value to return if len is invalid
  30  */
  31 static inline unsigned read_varlen(uint8_t **ptr, int len, int def) {
  32     const uint8_t *p = *ptr;
  33     len &= 3;
  34     switch (len) {
  35       case 1: *ptr += 1; return *p;
  36       case 2: *ptr += 2; return AV_RL16(p);
  37       case 3: *ptr += 4; return AV_RL32(p);
  38     }
  39     return def;
  40 }
  41
  42 static void asf_descrambling(unsigned char **src,unsigned len, struct asf_priv* asf){
  43   unsigned char *dst=malloc(len);
  44   unsigned char *s2=*src;
  45   unsigned i=0,x,y;
  46   while(len>=asf->scrambling_h*asf->scrambling_w*asf->scrambling_b+i){
  47 //    mp_msg(MSGT_DEMUX,MSGL_DBG4,"descrambling! (w=%d  b=%d)\n",w,asf_scrambling_b);
  48         //i+=asf_scrambling_h*asf_scrambling_w;
  49         for(x=0;x<asf->scrambling_w;x++)
  50           for(y=0;y<asf->scrambling_h;y++){
  51             fast_memcpy(dst+i,s2+(y*asf->scrambling_w+x)*asf->scrambling_b,asf->scrambling_b);
  52                 i+=asf->scrambling_b;
  53           }
  54         s2+=asf->scrambling_h*asf->scrambling_w*asf->scrambling_b;
  55   }
  56   //if(i<len) fast_memcpy(dst+i,src+i,len-i);
  57   free(*src);
  58   *src = dst;
  59 }
  60
  61 /*****************************************************************
  62  * \brief initializes asf private data
  63  *
  64  */
  65 static void init_priv (struct asf_priv* asf){
  66   asf->last_vid_seq=-1;
  67   asf->vid_ext_timing_index=-1;
  68   asf->aud_ext_timing_index=-1;
  69   asf->vid_ext_frame_index=-1;
  70 }
  71
  72 #ifdef USE_LIBAVCODEC_SO
  73 #include <ffmpeg/avcodec.h>
  74 #elif defined(USE_LIBAVCODEC)
  75 #include "libavcodec/avcodec.h"
  76 #else
  77 #define FF_INPUT_BUFFER_PADDING_SIZE 8
  78 #endif
  79
  80
  81 static void demux_asf_append_to_packet(demux_packet_t* dp,unsigned char *data,int len,int offs)
  82 {
  83   if(dp->len!=offs && offs!=-1) mp_msg(MSGT_DEMUX,MSGL_V,"warning! fragment.len=%d BUT next fragment offset=%d  \n",dp->len,offs);
  84   dp->buffer=realloc(dp->buffer,dp->len+len+FF_INPUT_BUFFER_PADDING_SIZE);
  85   fast_memcpy(dp->buffer+dp->len,data,len);
  86   memset(dp->buffer+dp->len+len, 0, FF_INPUT_BUFFER_PADDING_SIZE);
  87   mp_dbg(MSGT_DEMUX,MSGL_DBG4,"data appended! %d+%d\n",dp->len,len);
  88   dp->len+=len;
  89 }
  90
  91 static int demux_asf_read_packet(demuxer_t *demux,unsigned char *data,int len,int id,int seq,uint64_t time,unsigned short dur,int offs,int keyframe){
  92   struct asf_priv* asf = demux->priv;
  93   demux_stream_t *ds=NULL;
  94   int close_seg=0;
  95
  96   mp_dbg(MSGT_DEMUX,MSGL_DBG4,"demux_asf.read_packet: id=%d seq=%d len=%d\n",id,seq,len);
  97
  98   if(demux->video->id==-1)
  99     if(demux->v_streams[id])
 100         demux->video->id=id;
 101
 102   if(demux->audio->id==-1)
 103     if(demux->a_streams[id])
 104         demux->audio->id=id;
 105
 106   if(id==demux->audio->id){
 107       // audio
 108       ds=demux->audio;
 109       if(!ds->sh){
 110         ds->sh=demux->a_streams[id];
 111         mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected ASF audio ID = %d\n",ds->id);
 112       }
 113   } else
 114   if(id==demux->video->id){
 115       // video
 116       ds=demux->video;
 117       if(!ds->sh){
 118         ds->sh=demux->v_streams[id];
 119         mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected ASF video ID = %d\n",ds->id);
 120       }
 121   }
 122
 123   if(ds){
 124     if(ds->asf_packet){
 125       demux_packet_t* dp=ds->asf_packet;
 126
 127       if (ds==demux->video && asf->asf_is_dvr_ms) {
 128         if (asf->new_vid_frame_seg) {
 129           dp->pos=demux->filepos;
 130           close_seg = 1;
 131         } else seq = ds->asf_seq;
 132       } else close_seg = ds->asf_seq!=seq;
 133
 134       if(close_seg){
 135         // closed segment, finalize packet:
 136                 if(ds==demux->audio)
 137                   if(asf->scrambling_h>1 && asf->scrambling_w>1 && asf->scrambling_b>0)
 138                     asf_descrambling(&ds->asf_packet->buffer,ds->asf_packet->len,asf);
 139         ds_add_packet(ds,ds->asf_packet);
 140         ds->asf_packet=NULL;
 141       } else {
 142         // append data to it!
 143         demux_asf_append_to_packet(dp,data,len,offs);
 144         // we are ready now.
 145         return 1;
 146       }
 147     }
 148     // create new packet:
 149     { demux_packet_t* dp;
 150       if(offs>0){
 151         mp_msg(MSGT_DEMUX,MSGL_V,"warning!  broken fragment, %d bytes missing  \n",offs);
 152         return 0;
 153       }
 154       dp=new_demux_packet(len);
 155       fast_memcpy(dp->buffer,data,len);
 156       if (asf->asf_is_dvr_ms)
 157         dp->pts=time*0.0000001;
 158       else
 159         dp->pts=time*0.001;
 160       dp->flags=keyframe;
 161 //      if(ds==demux->video) printf("ASF time: %8d  dur: %5d  \n",time,dur);
 162       dp->pos=demux->filepos;
 163       ds->asf_packet=dp;
 164       ds->asf_seq=seq;
 165       // we are ready now.
 166       return 1;
 167     }
 168   }
 169
 170   return 0;
 171 }
 172
 173 /*****************************************************************
 174  * \brief read the replicated data associated with each segment
 175  * \parameter pp reference to replicated data
 176  * \parameter id stream number
 177  * \parameter seq media object number
 178  * \parameter keyframe key frame indicator - set to zero if keyframe, non-zero otherwise
 179  * \parameter seg_time set to payload time when valid, if audio or new video frame payload, zero otherwise
 180  *
 181  */
 182 static void get_payload_extension_data(demuxer_t *demux, unsigned char** pp, unsigned char id, unsigned int seq, int *keyframe, uint64_t *seg_time){
 183     struct asf_priv* asf = demux->priv;
 184     uint64_t payload_time; //100ns units
 185     int i, ext_max, ext_timing_index;
 186     uint8_t *pi = *pp+4;
 187
 188     if(demux->video->id==-1)
 189         if(demux->v_streams[id])
 190             demux->video->id=id;
 191
 192     if(demux->audio->id==-1)
 193         if(demux->a_streams[id])
 194             demux->audio->id=id;
 195
 196     if (id!=demux->video->id && id!=demux->audio->id) return;
 197
 198     if (id==demux->video->id) {
 199       ext_max = asf->vid_repdata_count;
 200       ext_timing_index = asf->vid_ext_timing_index;
 201     } else {
 202       ext_max = asf->aud_repdata_count;
 203       ext_timing_index = asf->aud_ext_timing_index;
 204     }
 205
 206     *seg_time=0.0;
 207     asf->new_vid_frame_seg = 0;
 208
 209     for (i=0; i<ext_max; i++) {
 210         uint16_t payextsize;
 211         uint8_t segment_marker;
 212
 213         if (id==demux->video->id)
 214             payextsize = asf->vid_repdata_sizes[i];
 215         else
 216             payextsize = asf->aud_repdata_sizes[i];
 217
 218         if (payextsize == 65535) {
 219             payextsize = AV_RL16(pi);
 220             pi+=2;
 221         }
 222
 223         // if this is the timing info extension then read the payload time
 224         if (i == ext_timing_index)
 225             payload_time = AV_RL64(pi+8);
 226
 227         // if this is the video frame info extension then
 228         // set the keyframe indicator, the 'new frame segment' indicator
 229         // and (initially) the 'frame time'
 230         if (i == asf->vid_ext_frame_index && id==demux->video->id) {
 231             segment_marker = pi[0];
 232             // Known video stream segment_marker values that
 233             // contain useful information:
 234             //
 235             // NTSC/ATSC (29.97fps):        0X4A 01001010
 236             //                              0X4B 01001011
 237             //                              0X49 01001001
 238             //
 239             // PAL/ATSC (25fps):            0X3A 00111010
 240             //                              0X3B 00111011
 241             //                              0X39 00111001
 242             //
 243             // ATSC progressive (29.97fps): 0X7A 01111010
 244             //                              0X7B 01111011
 245             //                              0X79 01111001
 246             //   11111111
 247             //       ^    this is new video frame marker
 248             //
 249             //   ^^^^     these bits indicate the framerate
 250             //            0X4 is 29.97i, 0X3 is 25i, 0X7 is 29.97p, ???=25p
 251             //
 252             //        ^^^ these bits indicate the frame type:
 253             //              001 means I-frame
 254             //              010 and 011 probably mean P and B
 255
 256             asf->new_vid_frame_seg = (0X08 & segment_marker) && seq != asf->last_vid_seq;
 257
 258             if (asf->new_vid_frame_seg) asf->last_vid_seq = seq;
 259
 260             if (asf->avg_vid_frame_time == 0) {
 261                 // set the average frame time initially (in 100ns units).
 262                 // This is based on what works for known samples.
 263                 // It can be extended if more samples of different types can be obtained.
 264                 if (((segment_marker & 0XF0) >> 4) == 4) {
 265                     asf->avg_vid_frame_time = (uint64_t)((1.001 / 30.0) * 10000000.0);
 266                     asf->know_frame_time=1;
 267                 } else if (((segment_marker & 0XF0) >> 4) == 3) {
 268                     asf->avg_vid_frame_time = (uint64_t)(0.04 * 10000000.0);
 269                     asf->know_frame_time=1;
 270                 } else if (((segment_marker & 0XF0) >> 4) == 6) {
 271                     asf->avg_vid_frame_time = (uint64_t)(0.02 * 10000000.0);
 272                     asf->know_frame_time=1;
 273                 } else if (((segment_marker & 0XF0) >> 4) == 7) {
 274                     asf->avg_vid_frame_time = (uint64_t)((1.001 / 60.0) * 10000000.0);
 275                     asf->know_frame_time=1;
 276                 } else {
 277                     // we dont know the frame time initially so
 278                     // make a guess and then recalculate as we go.
 279                     asf->avg_vid_frame_time = (uint64_t)((1.001 / 60.0) * 10000000.0);
 280                     asf->know_frame_time=0;
 281                 }
 282             }
 283             *keyframe = (asf->new_vid_frame_seg && (segment_marker & 0X07) == 1);
 284         }
 285         pi +=payextsize;
 286     }
 287
 288     if (id==demux->video->id && asf->new_vid_frame_seg) {
 289         asf->vid_frame_ct++;
 290         // Some samples only have timings on key frames and
 291         // the rest contain non-cronological timestamps. Interpolating
 292         // the values between key frames works for all samples.
 293         if (*keyframe) {
 294             asf->found_first_key_frame=1;
 295             if (!asf->know_frame_time && asf->last_key_payload_time > 0) {
 296                 // We dont know average frametime so recalculate.
 297                 // Giving precedence to the 'weight' of the existing
 298                 // average limits damage done to new value when there is
 299                 // a sudden time jump which happens occasionally.
 300                 asf->avg_vid_frame_time =
 301                    (0.9 * asf->avg_vid_frame_time) +
 302                    (0.1 * ((payload_time - asf->last_key_payload_time) / asf->vid_frame_ct));
 303             }
 304             asf->last_key_payload_time = payload_time;
 305             asf->vid_frame_ct = 1;
 306             *seg_time = payload_time;
 307         } else
 308             *seg_time = (asf->last_key_payload_time  + (asf->avg_vid_frame_time * (asf->vid_frame_ct-1)));
 309     }
 310
 311     if (id==demux->audio->id) {
 312         if (payload_time != -1)
 313             asf->last_aud_diff = payload_time - asf->last_aud_pts;
 314         asf->last_aud_pts += asf->last_aud_diff;
 315         *seg_time = asf->last_aud_pts;
 316    }
 317 }
 318 //static int num_elementary_packets100=0;
 319 //static int num_elementary_packets101=0;
 320
 321 // return value:
 322 //     0 = EOF or no stream found
 323 //     1 = successfully read a packet
 324 static int demux_asf_fill_buffer(demuxer_t *demux, demux_stream_t *ds){
 325   struct asf_priv* asf = demux->priv;
 326
 327   demux->filepos=stream_tell(demux->stream);
 328   // Brodcast stream have movi_start==movi_end
 329   // Better test ?
 330   if((demux->movi_start < demux->movi_end) && (demux->filepos>=demux->movi_end)){
 331           demux->stream->eof=1;
 332           return 0;
 333   }
 334
 335     stream_read(demux->stream,asf->packet,asf->packetsize);
 336     if(demux->stream->eof) return 0; // EOF
 337
 338     {
 339             unsigned char* p=asf->packet;
 340             unsigned char* p_end=asf->packet+asf->packetsize;
 341             unsigned char flags=p[0];
 342             unsigned char segtype=p[1];
 343             unsigned padding;
 344             unsigned plen;
 345             unsigned sequence;
 346             unsigned long time=0;
 347             unsigned short duration=0;
 348
 349             int segs=1;
 350             unsigned char segsizetype=0x80;
 351             int seg=-1;
 352
 353             if( mp_msg_test(MSGT_DEMUX,MSGL_DBG2) ){
 354                 int i;
 355                 for(i=0;i<16;i++) printf(" %02X",asf->packet[i]);
 356                 printf("\n");
 357             }
 358
 359             // skip ECC data if present by testing bit 7 of flags
 360             // 1xxxbbbb -> ecc data present, skip bbbb byte(s)
 361             // 0xxxxxxx -> payload parsing info starts
 362             if (flags & 0x80)
 363             {
 364                 p += (flags & 0x0f)+1;
 365                 flags = p[0];
 366                 segtype = p[1];
 367             }
 368
 369             //if(segtype!=0x5d) printf("Warning! packet[4] != 0x5d  \n");
 370
 371             p+=2; // skip flags & segtype
 372
 373             // Read packet size (plen):
 374             plen = read_varlen(&p, flags >> 5, 0);
 375
 376             // Read sequence:
 377             sequence = read_varlen(&p, flags >> 1, 0);
 378
 379             // Read padding size (padding):
 380             padding = read_varlen(&p, flags >> 3, 0);
 381
 382             if(((flags>>5)&3)!=0){
 383               // Explicit (absoulte) packet size
 384               mp_dbg(MSGT_DEMUX,MSGL_DBG2,"Explicit packet size specified: %d  \n",plen);
 385               if(plen>asf->packetsize) mp_msg(MSGT_DEMUX,MSGL_V,"Warning! plen>packetsize! (%d>%d)  \n",plen,asf->packetsize);
 386             } else {
 387               // Padding (relative) size
 388               plen=asf->packetsize-padding;
 389             }
 390
 391             // Read time & duration:
 392             time = AV_RL32(p); p+=4;
 393             duration = AV_RL16(p); p+=2;
 394
 395             // Read payload flags:
 396             if(flags&1){
 397               // multiple sub-packets
 398               segsizetype=p[0]>>6;
 399               segs=p[0] & 0x3F;
 400               ++p;
 401             }
 402             mp_dbg(MSGT_DEMUX,MSGL_DBG4,"%08"PRIu64":  flag=%02X  segs=%d  seq=%u  plen=%u  pad=%u  time=%ld  dur=%d\n",
 403               (uint64_t)demux->filepos,flags,segs,sequence,plen,padding,time,duration);
 404
 405             for(seg=0;seg<segs;seg++){
 406               //ASF_segmhdr_t* sh;
 407               unsigned char streamno;
 408               unsigned int seq;
 409               unsigned int x;   // offset or timestamp
 410               unsigned int rlen;
 411               //
 412               int len;
 413               uint64_t time2=0;
 414               int keyframe=0;
 415
 416               if(p>=p_end) {
 417                 mp_msg(MSGT_DEMUX,MSGL_V,"Warning! invalid packet 1, aborting parsing...\n");
 418                 break;
 419               }
 420
 421               if( mp_msg_test(MSGT_DEMUX,MSGL_DBG2) ){
 422                 int i;
 423                 printf("seg %d:",seg);
 424                 for(i=0;i<16;i++) printf(" %02X",p[i]);
 425                 printf("\n");
 426               }
 427
 428               streamno=p[0]&0x7F;
 429               if(p[0]&0x80) keyframe=1;
 430               p++;
 431
 432               // Read media object number (seq):
 433               seq = read_varlen(&p, segtype >> 4, 0);
 434
 435               // Read offset or timestamp:
 436               x = read_varlen(&p, segtype >> 2, 0);
 437
 438               // Read replic.data len:
 439               rlen = read_varlen(&p, segtype, 0);
 440
 441 //            printf("### rlen=%d   \n",rlen);
 442
 443               switch(rlen){
 444               case 0x01: // 1 = special, means grouping
 445                 //printf("grouping: %02X  \n",p[0]);
 446                 ++p; // skip PTS delta
 447                 break;
 448               default:
 449                 if(rlen>=8){
 450                     p+=4;       // skip object size
 451                     time2=AV_RL32(p); // read PTS
 452                     if (asf->asf_is_dvr_ms)
 453                         get_payload_extension_data(demux, &p, streamno, seq, &keyframe, &time2);
 454                     p+=rlen-4;
 455                 } else {
 456                     mp_msg(MSGT_DEMUX,MSGL_V,"unknown segment type (rlen): 0x%02X  \n",rlen);
 457                     time2=0; // unknown
 458                     p+=rlen;
 459                 }
 460               }
 461
 462               if(flags&1){
 463                 // multiple segments
 464                 len = read_varlen(&p, segsizetype, plen-(p-asf->packet));
 465               } else {
 466                 // single segment
 467                 len=plen-(p-asf->packet);
 468               }
 469               if(len<0 || (p+len)>p_end){
 470                 mp_msg(MSGT_DEMUX,MSGL_V,"ASF_parser: warning! segment len=%d\n",len);
 471               }
 472               mp_dbg(MSGT_DEMUX,MSGL_DBG4,"  seg #%d: streamno=%d  seq=%d  type=%02X  len=%d\n",seg,streamno,seq,rlen,len);
 473
 474               switch(rlen){
 475               case 0x01:
 476                 // GROUPING:
 477                 //printf("ASF_parser: warning! grouping (flag=1) not yet supported!\n",len);
 478                 //printf("  total: %d  \n",len);
 479                 while(len>0){
 480                   int len2=p[0];
 481                   p++;
 482                   //printf("  group part: %d bytes\n",len2);
 483                   demux_asf_read_packet(demux,p,len2,streamno,seq,x,duration,-1,keyframe);
 484                   p+=len2;
 485                   len-=len2+1;
 486                   ++seq;
 487                 }
 488                 if(len!=0){
 489                   mp_msg(MSGT_DEMUX,MSGL_V,"ASF_parser: warning! groups total != len\n");
 490                 }
 491                 break;
 492               default:
 493                 // NO GROUPING:
 494                 //printf("fragment offset: %d  \n",sh->x);
 495                 if (!asf->asf_is_dvr_ms || asf->found_first_key_frame)
 496                     demux_asf_read_packet(demux,p,len,streamno,seq,time2,duration,x,keyframe);
 497                 p+=len;
 498                 break;
 499               }
 500
 501             } // for segs
 502             return 1; // success
 503     }
 504
 505     mp_msg(MSGT_DEMUX,MSGL_V,"%08"PRIX64":  UNKNOWN TYPE  %02X %02X %02X %02X %02X...\n",(int64_t)demux->filepos,asf->packet[0],asf->packet[1],asf->packet[2],asf->packet[3],asf->packet[4]);
 506     return 0;
 507 }
 508
 509 #include "stheader.h"
 510
 511 extern void skip_audio_frame(sh_audio_t *sh_audio);
 512
 513 static void demux_seek_asf(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
 514     struct asf_priv* asf = demuxer->priv;
 515     demux_stream_t *d_audio=demuxer->audio;
 516     demux_stream_t *d_video=demuxer->video;
 517     sh_audio_t *sh_audio=d_audio->sh;
 518 //    sh_video_t *sh_video=d_video->sh;
 519
 520   //FIXME: OFF_T - didn't test ASF case yet (don't have a large asf...)
 521   //FIXME: reports good or bad to steve@daviesfam.org please
 522
 523   //================= seek in ASF ==========================
 524     float p_rate=asf->packetrate; // packets / sec
 525     off_t rel_seek_packs=(flags&2)?      // FIXME: int may be enough?
 526         (rel_seek_secs*(demuxer->movi_end-demuxer->movi_start)/asf->packetsize):
 527         (rel_seek_secs*p_rate);
 528     off_t rel_seek_bytes=rel_seek_packs*asf->packetsize;
 529     off_t newpos;
 530     //printf("ASF: packs: %d  duration: %d  \n",(int)fileh.packets,*((int*)&fileh.duration));
 531 //    printf("ASF_seek: %d secs -> %d packs -> %d bytes  \n",
 532 //       rel_seek_secs,rel_seek_packs,rel_seek_bytes);
 533     newpos=((flags&1)?demuxer->movi_start:demuxer->filepos)+rel_seek_bytes;
 534     if(newpos<0 || newpos<demuxer->movi_start) newpos=demuxer->movi_start;
 535 //    printf("\r -- asf: newpos=%d -- \n",newpos);
 536     stream_seek(demuxer->stream,newpos);
 537
 538     if (asf->asf_is_dvr_ms) asf->dvr_last_vid_pts = 0.0f;
 539
 540     if (d_video->id >= 0)
 541     ds_fill_buffer(d_video);
 542     if(sh_audio){
 543       ds_fill_buffer(d_audio);
 544     }
 545
 546     if (d_video->id >= 0)
 547     while(1){
 548         if(sh_audio && !d_audio->eof){
 549           float a_pts=d_audio->pts;
 550           a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
 551           // sync audio:
 552           if (d_video->pts > a_pts){
 553               skip_audio_frame(sh_audio);
 554 //            if(!ds_fill_buffer(d_audio)) sh_audio=NULL; // skip audio. EOF?
 555               continue;
 556           }
 557         }
 558         if(d_video->flags&1) break; // found a keyframe!
 559         if(!ds_fill_buffer(d_video)) break; // skip frame.  EOF?
 560     }
 561
 562
 563 }
 564
 565 static int demux_asf_control(demuxer_t *demuxer,int cmd, void *arg){
 566     struct asf_priv* asf = demuxer->priv;
 567 /*  demux_stream_t *d_audio=demuxer->audio;
 568     demux_stream_t *d_video=demuxer->video;
 569     sh_audio_t *sh_audio=d_audio->sh;
 570     sh_video_t *sh_video=d_video->sh;
 571 */
 572     switch(cmd) {
 573         case DEMUXER_CTRL_GET_TIME_LENGTH:
 574             *((double *)arg)=(double)(asf->movielength);
 575             return DEMUXER_CTRL_OK;
 576
 577         case DEMUXER_CTRL_GET_PERCENT_POS:
 578                 return DEMUXER_CTRL_DONTKNOW;
 579
 580         default:
 581             return DEMUXER_CTRL_NOTIMPL;
 582     }
 583 }
 584
 585
 586 static demuxer_t* demux_open_asf(demuxer_t* demuxer)
 587 {
 588     struct asf_priv* asf = demuxer->priv;
 589     sh_audio_t *sh_audio=NULL;
 590     sh_video_t *sh_video=NULL;
 591
 592     //---- ASF header:
 593     if(!asf) return NULL;
 594     init_priv(asf);
 595     if (!read_asf_header(demuxer,asf))
 596         return NULL;
 597     stream_reset(demuxer->stream);
 598     stream_seek(demuxer->stream,demuxer->movi_start);
 599 //    demuxer->idx_pos=0;
 600 //    demuxer->endpos=avi_header.movi_end;
 601     if(demuxer->video->id != -2) {
 602         if(!ds_fill_buffer(demuxer->video)){
 603             mp_msg(MSGT_DEMUXER,MSGL_WARN,"ASF: " MSGTR_MissingVideoStream);
 604             demuxer->video->sh=NULL;
 605             //printf("ASF: missing video stream!? contact the author, it may be a bug :(\n");
 606         } else {
 607             sh_video=demuxer->video->sh;sh_video->ds=demuxer->video;
 608             sh_video->fps=1000.0f; sh_video->frametime=0.001f;
 609
 610             if (asf->asf_is_dvr_ms) {
 611                 sh_video->bih->biWidth = 0;
 612                 sh_video->bih->biHeight = 0;
 613             }
 614         }
 615     }
 616
 617     if(demuxer->audio->id!=-2){
 618         mp_msg(MSGT_DEMUXER,MSGL_V,MSGTR_ASFSearchingForAudioStream,demuxer->audio->id);
 619         if(!ds_fill_buffer(demuxer->audio)){
 620             mp_msg(MSGT_DEMUXER,MSGL_INFO,"ASF: " MSGTR_MissingAudioStream);
 621             demuxer->audio->sh=NULL;
 622         } else {
 623             sh_audio=demuxer->audio->sh;sh_audio->ds=demuxer->audio;
 624             sh_audio->format=sh_audio->wf->wFormatTag;
 625         }
 626     }
 627     if(!demuxer->stream->seek)
 628         demuxer->seekable=0;
 629
 630     return demuxer;
 631 }
 632
 633
 634 static void demux_close_asf(demuxer_t *demuxer) {
 635     struct asf_priv* asf = demuxer->priv;
 636
 637     if (!asf) return;
 638
 639     if (asf->aud_repdata_sizes)
 640       free(asf->aud_repdata_sizes);
 641
 642     if (asf->vid_repdata_sizes)
 643       free(asf->vid_repdata_sizes);
 644
 645     free(asf);
 646 }
 647
 648 const demuxer_desc_t demuxer_desc_asf = {
 649   "ASF demuxer",
 650   "asf",
 651   "ASF",
 652   "A'rpi",
 653   "ASF, WMV, WMA",
 654   DEMUXER_TYPE_ASF,
 655   1, // safe autodetect
 656   asf_check_header,
 657   demux_asf_fill_buffer,
 658   demux_open_asf,
 659   demux_close_asf,
 660   demux_seek_asf,
 661   demux_asf_control
 662 };