libmpdemux/demux_mpg.c

   1 //  MPG/VOB file parser for DEMUXER v2.5  by A'rpi/ESP-team
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6 #include <math.h>
   7
   8 #include "config.h"
   9 #include "mp_msg.h"
  10 #include "help_mp.h"
  11
  12 #include "stream/stream.h"
  13 #include "demuxer.h"
  14 #include "parse_es.h"
  15 #include "stheader.h"
  16 #include "mp3_hdr.h"
  17
  18 //#define MAX_PS_PACKETSIZE 2048
  19 #define MAX_PS_PACKETSIZE (224*1024)
  20
  21 #define UNKNOWN         0
  22 #define VIDEO_MPEG1     0x10000001
  23 #define VIDEO_MPEG2     0x10000002
  24 #define VIDEO_MPEG4     0x10000004
  25 #define VIDEO_H264      0x10000005
  26 #define AUDIO_MP2       0x50
  27 #define AUDIO_A52       0x2000
  28 #define AUDIO_LPCM_BE   0x10001
  29 #define AUDIO_AAC       mmioFOURCC('M', 'P', '4', 'A')
  30
  31 typedef struct mpg_demuxer {
  32   float last_pts;
  33   float first_pts;              // first pts found in stream
  34   float first_to_final_pts_len; // difference between final pts and first pts
  35   int has_valid_timestamps;     // !=0 iff time stamps look linear
  36                                 // (not necessarily starting with 0)
  37   unsigned int es_map[0x40];    //es map of stream types (associated to the pes id) from 0xb0 to 0xef
  38   int num_a_streams;
  39   int a_stream_ids[MAX_A_STREAMS];
  40 } mpg_demuxer_t;
  41
  42 extern char* dvdsub_lang;
  43 static int mpeg_pts_error=0;
  44 off_t ps_probe = 0;
  45
  46 static int parse_psm(demuxer_t *demux, int len) {
  47   unsigned char c, id, type;
  48   unsigned int plen, prog_len, es_map_len;
  49   mpg_demuxer_t *priv = (mpg_demuxer_t *) demux->priv;
  50
  51   mp_dbg(MSGT_DEMUX,MSGL_V, "PARSE_PSM, len=%d\n", len);
  52   if(! len || len > 1018)
  53     return 0;
  54
  55   c = stream_read_char(demux->stream);
  56   if(! (c & 0x80)) {
  57     stream_skip(demux->stream, len - 1);  //not yet valid, discard
  58     return 0;
  59   }
  60   stream_skip(demux->stream, 1);
  61   prog_len = stream_read_word(demux->stream);           //length of program descriptors
  62   stream_skip(demux->stream, prog_len);                 //.. that we ignore
  63   es_map_len = stream_read_word(demux->stream);         //length of elementary streams map
  64   es_map_len = FFMIN(es_map_len, len - prog_len - 8);   //sanity check
  65   while(es_map_len > 0) {
  66     type = stream_read_char(demux->stream);
  67     id = stream_read_char(demux->stream);
  68     if(id >= 0xB0 && id <= 0xEF && priv) {
  69       int idoffset = id - 0xB0;
  70       switch(type) {
  71         case 0x1:
  72           priv->es_map[idoffset] = VIDEO_MPEG1;
  73           break;
  74         case 0x2:
  75           priv->es_map[idoffset] = VIDEO_MPEG2;
  76           break;
  77         case 0x3:
  78         case 0x4:
  79           priv->es_map[idoffset] = AUDIO_MP2;
  80           break;
  81         case 0x0f:
  82         case 0x11:
  83           priv->es_map[idoffset] = AUDIO_AAC;
  84           break;
  85         case 0x10:
  86           priv->es_map[idoffset] = VIDEO_MPEG4;
  87           break;
  88         case 0x1b:
  89           priv->es_map[idoffset] = VIDEO_H264;
  90           break;
  91         case 0x81:
  92           priv->es_map[idoffset] = AUDIO_A52;
  93           break;
  94       }
  95       mp_dbg(MSGT_DEMUX,MSGL_V, "PSM ES, id=0x%x, type=%x, stype: %x\n", id, type, priv->es_map[idoffset]);
  96     }
  97     plen = stream_read_word(demux->stream);             //length of elementary stream descriptors
  98     plen = FFMIN(plen, es_map_len);                     //sanity check
  99     stream_skip(demux->stream, plen);                   //skip descriptors for now
 100     es_map_len -= 4 + plen;
 101   }
 102   stream_skip(demux->stream, 4);                        //skip crc32
 103   return 1;
 104 }
 105
 106 // 500000 is a wild guess
 107 #define TIMESTAMP_PROBE_LEN 500000
 108
 109 //MAX_PTS_DIFF_FOR_CONSECUTIVE denotes the maximum difference
 110 //between two pts to consider them consecutive
 111 //1.0 is a wild guess
 112 #define MAX_PTS_DIFF_FOR_CONSECUTIVE 1.0
 113
 114 //returns the first pts found within TIME_STAMP_PROBE_LEN bytes after stream_pos in demuxer's stream.
 115 //if no pts is found or an error occurs, -1.0 is returned.
 116 //Packs are freed.
 117 static float read_first_mpeg_pts_at_position(demuxer_t* demuxer, off_t stream_pos)
 118 {
 119   stream_t *s = demuxer->stream;
 120   mpg_demuxer_t *mpg_d = demuxer->priv;
 121   float pts = -1.0; //the pts to return;
 122   float found_pts1; //the most recently found pts
 123   float found_pts2; //the pts found before found_pts1
 124   float found_pts3; //the pts found before found_pts2
 125   int found = 0;
 126
 127   if(!mpg_d || stream_pos < 0)
 128     return pts;
 129
 130   found_pts3 = found_pts2 = found_pts1 = mpg_d->last_pts;
 131   stream_seek(s, stream_pos);
 132
 133   //We look for pts.
 134   //However, we do not stop at the first found one, as timestamps may reset
 135   //Therefore, we seek until we found three consecutive
 136   //pts within MAX_PTS_DIFF_FOR_CONSECUTIVE.
 137
 138   while(found<3 && !s->eof
 139    && (fabsf(found_pts2-found_pts1) < MAX_PTS_DIFF_FOR_CONSECUTIVE)
 140    && (fabsf(found_pts3-found_pts2) < MAX_PTS_DIFF_FOR_CONSECUTIVE)
 141    && (stream_tell(s) < stream_pos + TIMESTAMP_PROBE_LEN)
 142    && ds_fill_buffer(demuxer->video))
 143   {
 144     if(mpg_d->last_pts != found_pts1)
 145     {
 146       if(!found)
 147         found_pts3 = found_pts2 = found_pts1 = mpg_d->last_pts; //the most recently found pts
 148       else
 149       {
 150         found_pts3 = found_pts2;
 151         found_pts2 = found_pts1;
 152         found_pts1 = mpg_d->last_pts;
 153       }
 154       found++;
 155     }
 156   }
 157
 158   if(found == 3) pts = found_pts3;
 159
 160   //clean up from searching of first pts;
 161   demux_flush(demuxer);
 162
 163   return pts;
 164 }
 165
 166 /// Open an mpg physical stream
 167 static demuxer_t* demux_mpg_open(demuxer_t* demuxer) {
 168   stream_t *s = demuxer->stream;
 169   mpg_demuxer_t* mpg_d;
 170
 171   if (!ds_fill_buffer(demuxer->video)) return 0;
 172   mpg_d = calloc(1,sizeof(mpg_demuxer_t));
 173   if(mpg_d)
 174   {
 175     demuxer->priv = mpg_d;
 176     mpg_d->last_pts = -1.0;
 177     mpg_d->first_pts = -1.0;
 178
 179     //if seeking is allowed set has_valid_timestamps if appropriate
 180     if(demuxer->seekable
 181        && (demuxer->stream->type == STREAMTYPE_FILE
 182            || demuxer->stream->type == STREAMTYPE_VCD)
 183        && demuxer->movi_start != demuxer-> movi_end
 184     )
 185     {
 186       //We seek to the beginning of the stream, to somewhere in the
 187       //middle, and to the end of the stream, while remembering the pts
 188       //at each of the three positions. With these pts, we check whether
 189       //or not the pts are "linear enough" to justify seeking by the pts
 190       //of the stream
 191
 192       //The position where the stream is now
 193       off_t pos = stream_tell(s);
 194       float first_pts = read_first_mpeg_pts_at_position(demuxer, demuxer->movi_start);
 195       if(first_pts != -1.0)
 196       {
 197         float middle_pts = read_first_mpeg_pts_at_position(demuxer, (demuxer->movi_end + demuxer->movi_start)/2);
 198         if(middle_pts != -1.0)
 199         {
 200           float final_pts = read_first_mpeg_pts_at_position(demuxer, demuxer->movi_end - TIMESTAMP_PROBE_LEN);
 201           if(final_pts != -1.0)
 202           {
 203             // found proper first, middle, and final pts.
 204             float proportion = (middle_pts-first_pts==0) ? -1 : (final_pts-middle_pts)/(middle_pts-first_pts);
 205             // if they are linear enough set has_valid_timestamps
 206             if((0.5 < proportion) && (proportion < 2))
 207             {
 208               mpg_d->first_pts = first_pts;
 209               mpg_d->first_to_final_pts_len = final_pts - first_pts;
 210               mpg_d->has_valid_timestamps = 1;
 211             }
 212           }
 213         }
 214       }
 215
 216       //Cleaning up from seeking in stream
 217       demuxer->stream->eof=0;
 218       demuxer->video->eof=0;
 219       demuxer->audio->eof=0;
 220
 221       stream_seek(s,pos);
 222       ds_fill_buffer(demuxer->video);
 223     } // if ( demuxer->seekable )
 224   } // if ( mpg_d )
 225   return demuxer;
 226 }
 227
 228 static void demux_close_mpg(demuxer_t* demuxer) {
 229   mpg_demuxer_t* mpg_d = demuxer->priv;
 230   if (mpg_d) free(mpg_d);
 231 }
 232
 233
 234 static unsigned long long read_mpeg_timestamp(stream_t *s,int c){
 235   unsigned int d,e;
 236   unsigned long long pts;
 237   d=stream_read_word(s);
 238   e=stream_read_word(s);
 239   if( ((c&1)!=1) || ((d&1)!=1) || ((e&1)!=1) ){
 240     ++mpeg_pts_error;
 241     return 0; // invalid pts
 242   }
 243   pts=(((uint64_t)((c>>1)&7))<<30)|((d>>1)<<15)|(e>>1);
 244   mp_dbg(MSGT_DEMUX,MSGL_DBG3," pts {%"PRIu64"}",pts);
 245   return pts;
 246 }
 247
 248 static void new_audio_stream(demuxer_t *demux, int aid){
 249   if(!demux->a_streams[aid]){
 250     mpg_demuxer_t *mpg_d=(mpg_demuxer_t*)demux->priv;
 251     sh_audio_t* sh_a;
 252     new_sh_audio(demux,aid);
 253     sh_a = (sh_audio_t*)demux->a_streams[aid];
 254     switch(aid & 0xE0){  // 1110 0000 b  (high 3 bit: type  low 5: id)
 255       case 0x00: sh_a->format=0x50;break; // mpeg
 256       case 0xA0: sh_a->format=0x10001;break;  // dvd pcm
 257       case 0x80: if((aid & 0xF8) == 0x88) sh_a->format=0x2001;//dts
 258                   else sh_a->format=0x2000;break; // ac3
 259     }
 260     //evo files
 261     if((aid & 0xC0) == 0xC0) sh_a->format=0x2000;
 262     else if(aid >= 0x98 && aid <= 0x9f) sh_a->format=0x2001;
 263     if (mpg_d) mpg_d->a_stream_ids[mpg_d->num_a_streams++] = aid;
 264   }
 265   if(demux->audio->id==-1) demux->audio->id=aid;
 266 }
 267
 268 static int demux_mpg_read_packet(demuxer_t *demux,int id){
 269   int d;
 270   int len;
 271   int set_pts=0; // !=0 iff pts has been set to a proper value
 272   unsigned char c=0;
 273   unsigned long long pts=0;
 274   unsigned long long dts=0;
 275   int l;
 276   int pes_ext2_subid=-1;
 277   double stream_pts = MP_NOPTS_VALUE;
 278   demux_stream_t *ds=NULL;
 279   demux_packet_t* dp;
 280   mpg_demuxer_t *priv = (mpg_demuxer_t *) demux->priv;
 281
 282   mp_dbg(MSGT_DEMUX,MSGL_DBG3,"demux_read_packet: %X\n",id);
 283
 284 //  if(id==0x1F0){
 285 //    demux->synced=0; // force resync after 0x1F0
 286 //    return -1;
 287 //}
 288
 289 //  if(id==0x1BA) packet_start_pos=stream_tell(demux->stream);
 290   if((id<0x1BC || id>=0x1F0) && id != 0x1FD) return -1;
 291   if(id==0x1BE) return -1; // padding stream
 292   if(id==0x1BF) return -1; // private2
 293
 294   len=stream_read_word(demux->stream);
 295   mp_dbg(MSGT_DEMUX,MSGL_DBG3,"PACKET len=%d",len);
 296 //  if(len==62480){ demux->synced=0;return -1;} /* :) */
 297   if(len==0 || len>MAX_PS_PACKETSIZE){
 298     mp_dbg(MSGT_DEMUX,MSGL_DBG2,"Invalid PS packet len: %d\n",len);
 299     return -2;  // invalid packet !!!!!!
 300   }
 301
 302   mpeg_pts_error=0;
 303
 304   if(id==0x1BC) {
 305     parse_psm(demux, len);
 306     return 0;
 307   }
 308
 309   while(len>0){   // Skip stuFFing bytes
 310     c=stream_read_char(demux->stream);
 311     --len;
 312     if(c!=0xFF)break;
 313   }
 314   if((c>>6)==1){  // Read (skip) STD scale & size value
 315 //    printf("  STD_scale=%d",(c>>5)&1);
 316     d=((c&0x1F)<<8)|stream_read_char(demux->stream);
 317     len-=2;
 318 //    printf("  STD_size=%d",d);
 319     c=stream_read_char(demux->stream);
 320   }
 321   // Read System-1 stream timestamps:
 322   if((c>>4)==2){
 323     pts=read_mpeg_timestamp(demux->stream,c);
 324     set_pts=1;
 325     len-=4;
 326   } else
 327   if((c>>4)==3){
 328     pts=read_mpeg_timestamp(demux->stream,c);
 329     c=stream_read_char(demux->stream);
 330     if((c>>4)!=1) pts=0; //printf("{ERROR4}");
 331     else set_pts = 1;
 332     dts=read_mpeg_timestamp(demux->stream,c);
 333     len-=4+1+4;
 334   } else
 335   if((c>>6)==2){
 336     int pts_flags;
 337     int hdrlen;
 338     int parse_ext2;
 339     // System-2 (.VOB) stream:
 340     c=stream_read_char(demux->stream);
 341     pts_flags=c>>6;
 342     parse_ext2 = (id == 0x1FD) && ((c & 0x3F) == 1);
 343     c=stream_read_char(demux->stream);
 344     hdrlen=c;
 345     len-=2;
 346     mp_dbg(MSGT_DEMUX,MSGL_DBG3,"  hdrlen=%d  (len=%d)",hdrlen,len);
 347     if(hdrlen>len){ mp_msg(MSGT_DEMUX,MSGL_V,"demux_mpg: invalid header length  \n"); return -1;}
 348     if(pts_flags==2 && hdrlen>=5){
 349       c=stream_read_char(demux->stream);
 350       pts=read_mpeg_timestamp(demux->stream,c);
 351       set_pts=1;
 352       len-=5;hdrlen-=5;
 353     } else
 354     if(pts_flags==3 && hdrlen>=10){
 355       c=stream_read_char(demux->stream);
 356       pts=read_mpeg_timestamp(demux->stream,c);
 357       set_pts=1;
 358       c=stream_read_char(demux->stream);
 359       dts=read_mpeg_timestamp(demux->stream,c);
 360       len-=10;hdrlen-=10;
 361     }
 362     len-=hdrlen;
 363     if(parse_ext2 && hdrlen>=3) {
 364       c=stream_read_char(demux->stream);
 365       hdrlen--;
 366
 367       if((c & 0x0F) != 0x0F) {
 368         mp_msg(MSGT_DEMUX,MSGL_V,"demux_mpg: pes_extension_flag2 not set, discarding pes packet\n");
 369         return -1;
 370       }
 371       if(c & 0x80) { //pes_private_data_flag
 372         if(hdrlen<16) {
 373           mp_msg(MSGT_DEMUX,MSGL_V,"demux_mpg: not enough pes_private_data bytes: %d < 16, discarding pes packet\n", hdrlen);
 374           return -1;
 375         }
 376         stream_skip(demux->stream, 16);
 377         hdrlen-=16;
 378       }
 379       if(c & 0x40) { //pack_header_field_flag
 380         int l = stream_read_char(demux->stream);
 381         if(l < 0) //couldn't read from the stream?
 382           return -1;
 383         hdrlen--;
 384         if(l < 0 || hdrlen < l) {
 385           mp_msg(MSGT_DEMUX,MSGL_V,"demux_mpg: not enough pack_header bytes: hdrlen: %d < skip: %d, discarding pes packet\n",
 386                                    hdrlen, l);
 387           return -1;
 388         }
 389         stream_skip(demux->stream, l);
 390         hdrlen-=l;
 391       }
 392       if(c & 0x20) { //program_packet_sequence_counter_flag
 393         if(hdrlen < 2) {
 394           mp_msg(MSGT_DEMUX,MSGL_V,"demux_mpg: not enough program_packet bytes: hdrlen: %d, discarding pes packet\n", hdrlen);
 395           return -1;
 396         }
 397         stream_skip(demux->stream, 2);
 398         hdrlen-=2;
 399       }
 400       if(c & 0x10) {
 401         //STD
 402         stream_skip(demux->stream, 2);
 403         hdrlen-=2;
 404       }
 405       c=stream_read_char(demux->stream); //pes_extension2 flag
 406       hdrlen--;
 407       if(c!=0x81)  { mp_msg(MSGT_DEMUX,MSGL_V,"demux_mpg: unknown pes_extension2 format, len is > 1  \n"); return -1;}
 408       c=stream_read_char(demux->stream); //pes_extension2 payload === substream id
 409       hdrlen--;
 410       if(c<0x55 || c>0x5F)   { mp_msg(MSGT_DEMUX,MSGL_V,"demux_mpg: unknown vc1 substream_id: 0x%x  \n", c); return -1;}
 411       pes_ext2_subid=c;
 412     }
 413     if(hdrlen>0)
 414       stream_skip(demux->stream,hdrlen); // skip header and stuffing bytes
 415
 416     if(id==0x1FD && pes_ext2_subid!=-1) {
 417       //==== EVO VC1 STREAMS ===//
 418       if(!demux->v_streams[pes_ext2_subid]) new_sh_video(demux,pes_ext2_subid);
 419       if(demux->video->id==-1) demux->video->id=pes_ext2_subid;
 420       if(demux->video->id==pes_ext2_subid){
 421         ds=demux->video;
 422         if(!ds->sh) ds->sh=demux->v_streams[pes_ext2_subid];
 423         if(priv && ds->sh) {
 424           sh_video_t *sh = (sh_video_t *)ds->sh;
 425           sh->format = mmioFOURCC('W', 'V', 'C', '1');
 426         }
 427       }
 428     }
 429     //============== DVD Audio sub-stream ======================
 430     if(id==0x1BD){
 431       int aid, rawa52 = 0;
 432       off_t tmppos;
 433       unsigned int tmp;
 434
 435       tmppos = stream_tell(demux->stream);
 436       tmp = stream_read_word(demux->stream);
 437       stream_seek(demux->stream, tmppos);
 438       /// vdr stores A52 without the 4 header bytes, so we have to check this condition first
 439       if(tmp == 0x0B77) {
 440         aid = 128;
 441         rawa52 = 1;
 442       }
 443       else {
 444         aid=stream_read_char(demux->stream);--len;
 445         if(len<3) return -1; // invalid audio packet
 446       }
 447
 448       // AID:
 449       // 0x20..0x3F  subtitle
 450       // 0x80..0x87 and 0xC0..0xCF  AC3 audio
 451       // 0x88..0x8F and 0x98..0x9F  DTS audio
 452       // 0xA0..0xBF  PCM audio
 453
 454       if((aid & 0xE0) == 0x20){
 455         // subtitle:
 456         aid&=0x1F;
 457
 458         if(!demux->s_streams[aid]){
 459             sh_sub_t *sh = new_sh_sub(demux, aid);
 460             if (sh) sh->type = 'v';
 461             mp_msg(MSGT_DEMUX,MSGL_V,"==> Found subtitle: %d\n",aid);
 462         }
 463
 464         if(demux->sub->id > -1)
 465           demux->sub->id &= 0x1F;
 466         if(!dvdsub_lang && demux->sub->id == -1)
 467           demux->sub->id = aid;
 468         if(demux->sub->id==aid){
 469             ds=demux->sub;
 470         }
 471       } else if((aid >= 0x80 && aid <= 0x8F) || (aid >= 0x98 && aid <= 0xAF) || (aid >= 0xC0 && aid <= 0xCF)) {
 472
 473 //        aid=128+(aid&0x7F);
 474         // aid=0x80..0xBF
 475         new_audio_stream(demux, aid);
 476       if(demux->audio->id==aid){
 477         int type;
 478         ds=demux->audio;
 479         if(!ds->sh) ds->sh=demux->a_streams[aid];
 480         // READ Packet: Skip additional audio header data:
 481         if(!rawa52) {
 482         c=stream_read_char(demux->stream);//num of frames
 483         type=stream_read_char(demux->stream);//startpos hi
 484         type=(type<<8)|stream_read_char(demux->stream);//startpos lo
 485 //        printf("\r[%02X][%04X]",c,type);
 486         len-=3;
 487         }
 488         if((aid&0xE0)==0xA0 && len>=3){
 489           unsigned char* hdr;
 490           // save audio header as codecdata!
 491           if(!((sh_audio_t*)(ds->sh))->codecdata_len){
 492               ((sh_audio_t*)(ds->sh))->codecdata=malloc(3);
 493               ((sh_audio_t*)(ds->sh))->codecdata_len=3;
 494           }
 495           hdr=((sh_audio_t*)(ds->sh))->codecdata;
 496           // read LPCM header:
 497           // emphasis[1], mute[1], rvd[1], frame number[5]:
 498           hdr[0]=stream_read_char(demux->stream);
 499 //          printf(" [%01X:%02d]",c>>5,c&31);
 500           // quantization[2],freq[2],rvd[1],channels[3]
 501           hdr[1]=stream_read_char(demux->stream);
 502 //          printf("[%01X:%01X] ",c>>4,c&15);
 503           // dynamic range control (0x80=off):
 504           hdr[2]=stream_read_char(demux->stream);
 505 //          printf("[%02X] ",c);
 506           len-=3;
 507           if(len<=0) mp_msg(MSGT_DEMUX,MSGL_V,"End of packet while searching for PCM header\n");
 508         }
 509 //        printf("  \n");
 510       } //  if(demux->audio->id==aid)
 511
 512       } else mp_msg(MSGT_DEMUX,MSGL_V,"Unknown 0x1BD substream: 0x%02X  \n",aid);
 513     } //if(id==0x1BD)
 514   } else {
 515     if(c!=0x0f){
 516       mp_msg(MSGT_DEMUX,MSGL_V,"  {ERROR5,c=%d}  \n",c);
 517       return -1;  // invalid packet !!!!!!
 518     }
 519   }
 520   if(mpeg_pts_error) mp_msg(MSGT_DEMUX,MSGL_V,"  {PTS_err:%d}  \n",mpeg_pts_error);
 521   mp_dbg(MSGT_DEMUX,MSGL_DBG3," => len=%d\n",len);
 522
 523 //  if(len<=0 || len>MAX_PS_PACKETSIZE) return -1;  // Invalid packet size
 524   if(len<=0 || len>MAX_PS_PACKETSIZE){
 525     mp_dbg(MSGT_DEMUX,MSGL_DBG2,"Invalid PS data len: %d\n",len);
 526     return -1;  // invalid packet !!!!!!
 527   }
 528
 529   if(id>=0x1C0 && id<=0x1DF){
 530     // mpeg audio
 531     int aid=id-0x1C0;
 532     new_audio_stream(demux, aid);
 533     if(demux->audio->id==aid){
 534       ds=demux->audio;
 535       if(!ds->sh) ds->sh=demux->a_streams[aid];
 536       if(priv && ds->sh) {
 537         sh_audio_t *sh = (sh_audio_t *)ds->sh;
 538         if(priv->es_map[id - 0x1B0])
 539           sh->format = priv->es_map[id - 0x1B0];
 540           mp_dbg(MSGT_DEMUX,MSGL_DBG2,"ASSIGNED TO STREAM %d CODEC %x\n", id, priv->es_map[id - 0x1B0]);
 541       }
 542     }
 543   } else
 544   if(id>=0x1E0 && id<=0x1EF){
 545     // mpeg video
 546     int aid=id-0x1E0;
 547     if(!demux->v_streams[aid]) new_sh_video(demux,aid);
 548     if(demux->video->id==-1) demux->video->id=aid;
 549     if(demux->video->id==aid){
 550       ds=demux->video;
 551       if(!ds->sh) ds->sh=demux->v_streams[aid];
 552       if(priv && ds->sh) {
 553         sh_video_t *sh = (sh_video_t *)ds->sh;
 554         if(priv->es_map[id - 0x1B0]) {
 555           sh->format = priv->es_map[id - 0x1B0];
 556           mp_dbg(MSGT_DEMUX,MSGL_DBG2,"ASSIGNED TO STREAM %d CODEC %x\n", id, priv->es_map[id - 0x1B0]);
 557         }
 558       }
 559     }
 560   }
 561
 562   if(ds){
 563     mp_dbg(MSGT_DEMUX,MSGL_DBG2,"DEMUX_MPG: Read %d data bytes from packet %04X\n",len,id);
 564 //    printf("packet start = 0x%X  \n",stream_tell(demux->stream)-packet_start_pos);
 565
 566     dp=new_demux_packet(len);
 567     if(!dp) {
 568       mp_dbg(MSGT_DEMUX,MSGL_ERR,"DEMUX_MPG ERROR: couldn't create demux_packet(%d bytes)\n",len);
 569       stream_skip(demux->stream,len);
 570       return 0;
 571     }
 572     l = stream_read(demux->stream,dp->buffer,len);
 573     if(l<len)
 574       resize_demux_packet(dp, l);
 575     len = l;
 576     if(set_pts)
 577       dp->pts=pts/90000.0f;
 578     dp->pos=demux->filepos;
 579     /*
 580       workaround:
 581       set dp->stream_pts only when feeding the video stream, or strangely interleaved files
 582       (such as SWIII) will show strange alternations in the stream time, wildly going
 583       back and forth
 584     */
 585     if(ds == demux->video && stream_control(demux->stream, STREAM_CTRL_GET_CURRENT_TIME,(void *)&stream_pts)!=STREAM_UNSUPPORTED)
 586       dp->stream_pts = stream_pts;
 587     ds_add_packet(ds,dp);
 588     if (demux->priv && set_pts) ((mpg_demuxer_t*)demux->priv)->last_pts = pts/90000.0f;
 589 //    if(ds==demux->sub) parse_dvdsub(ds->last->buffer,ds->last->len);
 590     return 1;
 591   }
 592   mp_dbg(MSGT_DEMUX,MSGL_DBG2,"DEMUX_MPG: Skipping %d data bytes from packet %04X\n",len,id);
 593   if(len<=2356) stream_skip(demux->stream,len);
 594   return 0;
 595 }
 596
 597 static int num_elementary_packets100=0;
 598 static int num_elementary_packets101=0;
 599 static int num_elementary_packets12x=0;
 600 static int num_elementary_packets1B6=0;
 601 static int num_elementary_packetsPES=0;
 602 static int num_mpeg12_startcode=0;
 603 static int num_h264_slice=0; //combined slice
 604 static int num_h264_dpa=0; //DPA Slice
 605 static int num_h264_dpb=0; //DPB Slice
 606 static int num_h264_dpc=0; //DPC Slice
 607 static int num_h264_idr=0; //IDR Slice
 608 static int num_h264_sps=0;
 609 static int num_h264_pps=0;
 610
 611 static int num_mp3audio_packets=0;
 612
 613 static void clear_stats(void)
 614 {
 615   num_elementary_packets100=0;
 616   num_elementary_packets101=0;
 617   num_elementary_packets1B6=0;
 618   num_elementary_packets12x=0;
 619   num_elementary_packetsPES=0;
 620   num_mpeg12_startcode=0;
 621   num_h264_slice=0; //combined slice
 622   num_h264_dpa=0; //DPA Slice
 623   num_h264_dpb=0; //DPB Slice
 624   num_h264_dpc=0; //DPC Slice
 625   num_h264_idr=0; //IDR Slice
 626   num_h264_sps=0;
 627   num_h264_pps=0;
 628   num_mp3audio_packets=0;
 629 }
 630
 631 //assumes demuxer->synced < 2
 632 static inline void update_stats(int head)
 633 {
 634   if(head==0x1B6) ++num_elementary_packets1B6;
 635   else if(head==0x1B3 || head==0x1B8) ++num_mpeg12_startcode;
 636   else if(head==0x100) ++num_elementary_packets100;
 637   else if(head==0x101) ++num_elementary_packets101;
 638   else if(head==0x1BD || (0x1C0<=head && head<=0x1EF))
 639     num_elementary_packetsPES++;
 640   else if(head>=0x120 && head<=0x12F) ++num_elementary_packets12x;
 641   if(head>=0x100 && head<0x1B0)
 642   {
 643     if((head&~0x60) == 0x101) ++num_h264_slice;
 644     else if((head&~0x60) == 0x102) ++num_h264_dpa;
 645     else if((head&~0x60) == 0x103) ++num_h264_dpb;
 646     else if((head&~0x60) == 0x104) ++num_h264_dpc;
 647     else if((head&~0x60) == 0x105 && head != 0x105) ++num_h264_idr;
 648     else if((head&~0x60) == 0x107 && head != 0x107) ++num_h264_sps;
 649     else if((head&~0x60) == 0x108 && head != 0x108) ++num_h264_pps;
 650   }
 651 }
 652
 653 static int demux_mpg_probe(demuxer_t *demuxer) {
 654   int pes=1;
 655   int tmp;
 656   off_t tmppos;
 657   int file_format = DEMUXER_TYPE_UNKNOWN;
 658
 659   tmppos=stream_tell(demuxer->stream);
 660   tmp=stream_read_dword(demuxer->stream);
 661   if(tmp==0x1E0 || tmp==0x1C0) {
 662     tmp=stream_read_word(demuxer->stream);
 663     if(tmp>1 && tmp<=2048) pes=0; // demuxer->synced=3; // PES...
 664   }
 665   stream_seek(demuxer->stream,tmppos);
 666
 667   clear_stats();
 668
 669   if(demux_mpg_open(demuxer))
 670     file_format=DEMUXER_TYPE_MPEG_PS;
 671   else {
 672     mp_msg(MSGT_DEMUX,MSGL_V,"MPEG packet stats: p100: %d  p101: %d p1B6: %d p12x: %d sli: %d a: %d b: %d c: %d idr: %d sps: %d pps: %d PES: %d  MP3: %d, synced: %d\n",
 673      num_elementary_packets100,num_elementary_packets101,
 674      num_elementary_packets1B6,num_elementary_packets12x,
 675      num_h264_slice, num_h264_dpa,
 676      num_h264_dpb, num_h264_dpc=0,
 677      num_h264_idr, num_h264_sps=0,
 678      num_h264_pps,
 679      num_elementary_packetsPES,num_mp3audio_packets, demuxer->synced);
 680
 681      //MPEG packet stats: p100: 458  p101: 458  PES: 0  MP3: 1103  (.m2v)
 682      if(num_mp3audio_packets>50 && num_mp3audio_packets>2*num_elementary_packets100
 683         && abs(num_elementary_packets100-num_elementary_packets101)>2)
 684        return file_format;
 685
 686       // some hack to get meaningfull error messages to our unhappy users:
 687       if(num_mpeg12_startcode>=2 && num_elementary_packets100>=2 && num_elementary_packets101>=2 &&
 688          abs(num_elementary_packets101+8-num_elementary_packets100)<16) {
 689          if(num_elementary_packetsPES>=4 && num_elementary_packetsPES>=num_elementary_packets100-4) {
 690            return file_format;
 691          }
 692          file_format=DEMUXER_TYPE_MPEG_ES; //  <-- hack is here :)
 693       } else
 694           // fuzzy mpeg4-es detection. do NOT enable without heavy testing of mpeg formats detection!
 695         if(num_elementary_packets1B6>3 && num_elementary_packets12x>=1 &&
 696            num_elementary_packetsPES==0 && num_elementary_packets100<=num_elementary_packets12x &&
 697            demuxer->synced<2) {
 698              file_format=DEMUXER_TYPE_MPEG4_ES;
 699         } else
 700          // fuzzy h264-es detection. do NOT enable without heavy testing of mpeg formats detection!
 701         if((num_h264_slice>3 || (num_h264_dpa>3 && num_h264_dpb>3 && num_h264_dpc>3)) &&
 702           /* FIXME num_h264_sps>=1 && */ num_h264_pps>=1 && num_h264_idr>=1 &&
 703           num_elementary_packets1B6==0 && num_elementary_packetsPES==0 &&
 704           demuxer->synced<2) {
 705             file_format=DEMUXER_TYPE_H264_ES;
 706         } else
 707         {
 708           if(demuxer->synced==2)
 709             mp_msg(MSGT_DEMUXER,MSGL_ERR,"MPEG: " MSGTR_MissingVideoStreamBug);
 710           else
 711             mp_msg(MSGT_DEMUXER,MSGL_V,MSGTR_NotSystemStream);
 712         }
 713   }
 714   //FIXME this shouldn't be necessary
 715   stream_seek(demuxer->stream,tmppos);
 716   return file_format;
 717 }
 718
 719 static int demux_mpg_es_fill_buffer(demuxer_t *demux, demux_stream_t *ds){
 720   // Elementary video stream
 721   if(demux->stream->eof) return 0;
 722   demux->filepos=stream_tell(demux->stream);
 723   ds_read_packet(demux->video,demux->stream,STREAM_BUFFER_SIZE,0,demux->filepos,0);
 724   return 1;
 725 }
 726
 727 /**
 728  * \brief discard until 0x100 header and return a filled buffer
 729  * \param b buffer-end pointer
 730  * \param pos current pos in stream, negative since b points to end of buffer
 731  * \param s stream to read from
 732  * \return new position, differs from original pos when eof hit and thus
 733  *             b was modified to point to the new end of buffer
 734  */
 735 static int find_end(unsigned char **b, int pos, stream_t *s) {
 736   register int state = 0xffffffff;
 737   unsigned char *buf = *b;
 738   int start = pos;
 739   int read, unused;
 740   // search already read part
 741   while (state != 0x100 && pos) {
 742     state = state << 8 | buf[pos++];
 743   }
 744   // continue search in stream
 745   while (state != 0x100) {
 746     register int c = stream_read_char(s);
 747     if (c < 0) break;
 748     state = state << 8 | c;
 749   }
 750   // modify previous header (from 0x1bc or 0x1bf to 0x100)
 751   buf[start++] = 0;
 752   // copy remaining buffer part to current pos
 753   memmove(&buf[start], &buf[pos], -pos);
 754   unused = start + -pos; // -unused bytes in buffer
 755   read = stream_read(s, &buf[unused], -unused);
 756   unused += read;
 757   // fix buffer so it ends at pos == 0 (eof case)
 758   *b = &buf[unused];
 759   start -= unused;
 760   return start;
 761 }
 762
 763 /**
 764  * This format usually uses an insane bitrate, which makes this function
 765  * performance-critical!
 766  * Be sure to benchmark any changes with different compiler versions.
 767  */
 768 static int demux_mpg_gxf_fill_buffer(demuxer_t *demux, demux_stream_t *ds) {
 769   demux_packet_t *pack;
 770   int len;
 771   demux->filepos = stream_tell(demux->stream);
 772   pack = new_demux_packet(STREAM_BUFFER_SIZE);
 773   len = stream_read(demux->stream, pack->buffer, STREAM_BUFFER_SIZE);
 774   if (len <= 0)
 775   {
 776     free_demux_packet(pack);
 777     return 0;
 778   }
 779   {
 780     register uint32_t state = (uint32_t)demux->priv;
 781     register int pos = -len;
 782     unsigned char *buf = &pack->buffer[len];
 783     do {
 784       state = state << 8 | buf[pos];
 785       if (unlikely((state | 3) == 0x1bf))
 786         pos = find_end(&buf, pos, demux->stream);
 787     } while (++pos < 0);
 788     demux->priv = (void *)state;
 789     len = buf - pack->buffer;
 790   }
 791   if (len < STREAM_BUFFER_SIZE)
 792     resize_demux_packet(pack, len);
 793   ds_add_packet(ds, pack);
 794   return 1;
 795 }
 796
 797 int demux_mpg_fill_buffer(demuxer_t *demux, demux_stream_t *ds){
 798 unsigned int head=0;
 799 int skipped=0;
 800 int max_packs=256; // 512kbyte
 801 int ret=0;
 802
 803 // System stream
 804 do{
 805   demux->filepos=stream_tell(demux->stream);
 806 #if 1
 807   //lame workaround: this is needed to show the progress bar when playing dvdnav://
 808   //(ths poor guy doesn't know teh length of the stream at startup)
 809   demux->movi_end = demux->stream->end_pos;
 810 #endif
 811   head=stream_read_dword(demux->stream);
 812   if((head&0xFFFFFF00)!=0x100){
 813    // sync...
 814    demux->filepos-=skipped;
 815    while(1){
 816     int c=stream_read_char(demux->stream);
 817     if(c<0) break; //EOF
 818     head<<=8;
 819     if(head!=0x100){
 820       head|=c;
 821       if(mp_check_mp3_header(head)) ++num_mp3audio_packets;
 822       ++skipped; //++demux->filepos;
 823       continue;
 824     }
 825     head|=c;
 826     break;
 827    }
 828    demux->filepos+=skipped;
 829   }
 830   if(stream_eof(demux->stream)) break;
 831   // sure: head=0x000001XX
 832   mp_dbg(MSGT_DEMUX,MSGL_DBG4,"*** head=0x%X\n",head);
 833   if(demux->synced==0){
 834     if(head==0x1BA) demux->synced=1; //else
 835 //    if(head==0x1BD || (head>=0x1C0 && head<=0x1EF)) demux->synced=3; // PES?
 836   } else
 837   if(demux->synced==1){
 838     if(head==0x1BB || head==0x1BD || (head>=0x1C0 && head<=0x1EF)){
 839       demux->synced=2;
 840       mp_msg(MSGT_DEMUX,MSGL_V,"system stream synced at 0x%"PRIX64" (%"PRId64")!\n",(int64_t)demux->filepos,(int64_t)demux->filepos);
 841       num_elementary_packets100=0; // requires for re-sync!
 842       num_elementary_packets101=0; // requires for re-sync!
 843     } else demux->synced=0;
 844   } // else
 845   if(demux->synced>=2){
 846       ret=demux_mpg_read_packet(demux,head);
 847       if(!ret)
 848         if(--max_packs==0){
 849           demux->stream->eof=1;
 850           mp_msg(MSGT_DEMUX,MSGL_ERR,MSGTR_DoesntContainSelectedStream);
 851           return 0;
 852         }
 853       if(demux->synced==3) demux->synced=(ret==1)?2:0; // PES detect
 854   } else {
 855     update_stats(head);
 856     if(head>=0x100 && head<0x1B0)
 857       mp_msg(MSGT_DEMUX,MSGL_DBG3,"Opps... elementary video packet found: %03X\n",head);
 858     else if((head>=0x1C0 && head<0x1F0) || head==0x1BD)
 859       mp_msg(MSGT_DEMUX,MSGL_DBG3,"Opps... PES packet found: %03X\n",head);
 860
 861     if(((num_elementary_packets100>50 && num_elementary_packets101>50) ||
 862         (num_elementary_packetsPES>50)) && skipped>4000000){
 863         mp_msg(MSGT_DEMUX,MSGL_V,"sync_mpeg_ps: seems to be ES/PES stream...\n");
 864         demux->stream->eof=1;
 865         break;
 866     }
 867     if(num_mp3audio_packets>100 && num_elementary_packets100<10){
 868         mp_msg(MSGT_DEMUX,MSGL_V,"sync_mpeg_ps: seems to be MP3 stream...\n");
 869         demux->stream->eof=1;
 870         break;
 871     }
 872   }
 873 } while(ret!=1);
 874   mp_dbg(MSGT_DEMUX,MSGL_DBG2,"demux: %d bad bytes skipped\n",skipped);
 875   if(demux->stream->eof){
 876     mp_msg(MSGT_DEMUX,MSGL_V,"MPEG Stream reached EOF\n");
 877     return 0;
 878   }
 879   return 1;
 880 }
 881
 882 void skip_audio_frame(sh_audio_t *sh_audio);
 883
 884 void demux_seek_mpg(demuxer_t *demuxer,float rel_seek_secs,float audio_delay, int flags){
 885     demux_stream_t *d_audio=demuxer->audio;
 886     demux_stream_t *d_video=demuxer->video;
 887     sh_audio_t *sh_audio=d_audio->sh;
 888     sh_video_t *sh_video=d_video->sh;
 889     mpg_demuxer_t *mpg_d=(mpg_demuxer_t*)demuxer->priv;
 890     int precision = 1;
 891     float oldpts = 0;
 892     off_t oldpos = demuxer->filepos;
 893     float newpts = 0;
 894     off_t newpos = (flags & SEEK_ABSOLUTE) ? demuxer->movi_start : oldpos;
 895
 896     if(mpg_d)
 897       oldpts = mpg_d->last_pts;
 898     newpts = (flags & SEEK_ABSOLUTE) ? 0.0 : oldpts;
 899   //================= seek in MPEG ==========================
 900   //calculate the pts to seek to
 901     if(flags & SEEK_FACTOR) {
 902       if (mpg_d && mpg_d->first_to_final_pts_len > 0.0)
 903         newpts += mpg_d->first_to_final_pts_len * rel_seek_secs;
 904       else
 905         newpts += rel_seek_secs * (demuxer->movi_end - demuxer->movi_start) * oldpts / oldpos;
 906     } else
 907       newpts += rel_seek_secs;
 908     if (newpts < 0) newpts = 0;
 909
 910     if(flags&SEEK_FACTOR){
 911         // float seek 0..1
 912         newpos+=(demuxer->movi_end-demuxer->movi_start)*rel_seek_secs;
 913     } else {
 914         // time seek (secs)
 915         if (mpg_d && mpg_d->has_valid_timestamps) {
 916           if (mpg_d->first_to_final_pts_len > 0.0)
 917             newpos += rel_seek_secs * (demuxer->movi_end - demuxer->movi_start) / mpg_d->first_to_final_pts_len;
 918           else if (oldpts > 0.0)
 919             newpos += rel_seek_secs * (oldpos - demuxer->movi_start) / oldpts;
 920         } else if(!sh_video || !sh_video->i_bps) // unspecified or VBR
 921           newpos+=2324*75*rel_seek_secs; // 174.3 kbyte/sec
 922         else
 923           newpos+=sh_video->i_bps*rel_seek_secs;
 924     }
 925
 926     while (1) {
 927         if(newpos<demuxer->movi_start){
 928             if(demuxer->stream->type!=STREAMTYPE_VCD) demuxer->movi_start=0; // for VCD
 929             if(newpos<demuxer->movi_start) newpos=demuxer->movi_start;
 930         }
 931
 932         stream_seek(demuxer->stream,newpos);
 933
 934         // re-sync video:
 935         videobuf_code_len=0; // reset ES stream buffer
 936
 937         ds_fill_buffer(d_video);
 938         if(sh_audio){
 939           ds_fill_buffer(d_audio);
 940         }
 941
 942         while(1){
 943           int i;
 944           if(sh_audio && !d_audio->eof && d_video->pts && d_audio->pts){
 945             float a_pts=d_audio->pts;
 946             a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
 947             if(d_video->pts>a_pts){
 948               skip_audio_frame(sh_audio);  // sync audio
 949               continue;
 950             }
 951           }
 952           if(!sh_video) break;
 953           i=sync_video_packet(d_video);
 954           if(sh_video->format == mmioFOURCC('W', 'V', 'C', '1')) {
 955             if(i==0x10E || i==0x10F) //entry point or sequence header
 956               break;
 957           } else
 958           if(sh_video->format == 0x10000004) {  //mpeg4
 959             if(i==0x1B6) {                      //vop (frame) startcode
 960               int pos = videobuf_len;
 961               if(!read_video_packet(d_video)) break; // EOF
 962               if((videobuffer[pos+4] & 0x3F) == 0) break;       //I-frame
 963             }
 964           } else if(sh_video->format == 0x10000005){    //h264
 965             if((i & ~0x60) == 0x105) break;
 966           } else {      //default mpeg1/2
 967             if(i==0x1B3 || i==0x1B8) break; // found it!
 968           }
 969           if(!i || !skip_video_packet(d_video)) break; // EOF?
 970         }
 971         if(!mpg_d)
 972           break;
 973         if (!precision || abs(newpts - mpg_d->last_pts) < 0.5 || (mpg_d->last_pts == oldpts)) break;
 974         if ((newpos - oldpos) * (mpg_d->last_pts - oldpts) < 0) { // invalid timestamps
 975           mpg_d->has_valid_timestamps = 0;
 976           break;
 977         }
 978         precision--;
 979         //prepare another seek because we are off by more than 0.5s
 980         if(mpg_d) {
 981         newpos += (newpts - mpg_d->last_pts) * (newpos - oldpos) / (mpg_d->last_pts - oldpts);
 982         demux_flush(demuxer);
 983         demuxer->stream->eof=0; // clear eof flag
 984         d_video->eof=0;
 985         d_audio->eof=0;
 986         }
 987     }
 988 }
 989
 990 int demux_mpg_control(demuxer_t *demuxer,int cmd, void *arg){
 991     mpg_demuxer_t *mpg_d=(mpg_demuxer_t*)demuxer->priv;
 992
 993     switch(cmd) {
 994         case DEMUXER_CTRL_GET_TIME_LENGTH:
 995             if(stream_control(demuxer->stream, STREAM_CTRL_GET_TIME_LENGTH, arg) != STREAM_UNSUPPORTED) {
 996               mp_msg(MSGT_DEMUXER,MSGL_DBG2,"\r\nDEMUX_MPG_CTRL, (%.3lf)\r\n", *((double*)arg));
 997               return DEMUXER_CTRL_GUESS;
 998             }
 999             if (mpg_d && mpg_d->has_valid_timestamps) {
1000               *((double *)arg)=(double)mpg_d->first_to_final_pts_len;
1001               return DEMUXER_CTRL_OK;
1002             }
1003                 return DEMUXER_CTRL_DONTKNOW;
1004
1005         case DEMUXER_CTRL_GET_PERCENT_POS:
1006             if (mpg_d && mpg_d->has_valid_timestamps && mpg_d->first_to_final_pts_len > 0.0) {
1007               *((int *)arg)=(int)(100 * (mpg_d->last_pts-mpg_d->first_pts) / mpg_d->first_to_final_pts_len);
1008               return DEMUXER_CTRL_OK;
1009             }
1010             return DEMUXER_CTRL_DONTKNOW;
1011
1012         case DEMUXER_CTRL_SWITCH_AUDIO:
1013             if(! (mpg_d && mpg_d->num_a_streams > 1 && demuxer->audio && demuxer->audio->sh))
1014               return DEMUXER_CTRL_NOTIMPL;
1015             else {
1016               demux_stream_t *d_audio = demuxer->audio;
1017               sh_audio_t *sh_audio = d_audio->sh;
1018               sh_audio_t *sh_a = sh_audio;
1019               int i;
1020               if(!sh_audio)
1021                 return DEMUXER_CTRL_NOTIMPL;
1022               if (*((int*)arg) < 0)
1023               {
1024               for (i = 0; i < mpg_d->num_a_streams; i++) {
1025                 if (d_audio->id == mpg_d->a_stream_ids[i]) break;
1026               }
1027                 i = (i+1) % mpg_d->num_a_streams;
1028                 sh_a = (sh_audio_t*)demuxer->a_streams[mpg_d->a_stream_ids[i]];
1029               }
1030               else {
1031                 for (i = 0; i < mpg_d->num_a_streams; i++)
1032                   if (*((int*)arg) == mpg_d->a_stream_ids[i]) break;
1033                 if (i < mpg_d->num_a_streams)
1034                   sh_a = (sh_audio_t*)demuxer->a_streams[*((int*)arg)];
1035               }
1036               if (i < mpg_d->num_a_streams && d_audio->id != mpg_d->a_stream_ids[i]) {
1037                 d_audio->id = mpg_d->a_stream_ids[i];
1038                 d_audio->sh = sh_a;
1039                 ds_free_packs(d_audio);
1040               }
1041             }
1042             *((int*)arg) = demuxer->audio->id;
1043             return DEMUXER_CTRL_OK;
1044
1045         default:
1046             return DEMUXER_CTRL_NOTIMPL;
1047     }
1048 }
1049
1050
1051 static int demux_mpg_pes_probe(demuxer_t *demuxer) {
1052    demuxer->synced = 3;
1053    return (demux_mpg_probe(demuxer) == DEMUXER_TYPE_MPEG_PS) ? DEMUXER_TYPE_MPEG_PES : 0;
1054 }
1055
1056
1057 static demuxer_t* demux_mpg_es_open(demuxer_t* demuxer)
1058 {
1059     sh_video_t *sh_video=NULL;
1060
1061     demuxer->audio->sh = NULL;   // ES streams has no audio channel
1062     demuxer->video->sh = new_sh_video(demuxer,0); // create dummy video stream header, id=0
1063     sh_video=demuxer->video->sh;sh_video->ds=demuxer->video;
1064
1065     return demuxer;
1066 }
1067
1068 static demuxer_t *demux_mpg_gxf_open(demuxer_t *demuxer) {
1069   demuxer->audio->sh = NULL;
1070   demuxer->video->sh = new_sh_video(demuxer,0);
1071   ((sh_video_t *)demuxer->video->sh)->ds = demuxer->video;
1072   demuxer->priv = (void *) 0xffffffff;
1073   return demuxer;
1074 }
1075
1076 static demuxer_t* demux_mpg_ps_open(demuxer_t* demuxer)
1077 {
1078     sh_audio_t *sh_audio=NULL;
1079     sh_video_t *sh_video=NULL;
1080
1081     sh_video=demuxer->video->sh;sh_video->ds=demuxer->video;
1082
1083     if(demuxer->audio->id!=-2) {
1084         if(!ds_fill_buffer(demuxer->audio)){
1085             mp_msg(MSGT_DEMUXER,MSGL_INFO,"MPEG: " MSGTR_MissingAudioStream);
1086             demuxer->audio->sh=NULL;
1087         } else {
1088             sh_audio=demuxer->audio->sh;sh_audio->ds=demuxer->audio;
1089         }
1090     }
1091
1092     if(!sh_video->format && ps_probe > 0) {
1093         int head;
1094         off_t pos = stream_tell(demuxer->stream);
1095
1096         clear_stats();
1097         do {
1098             head=sync_video_packet(demuxer->video);
1099             if(!head) break;
1100             update_stats(head);
1101             skip_video_packet(demuxer->video);
1102         } while(stream_tell(demuxer->stream) < pos + ps_probe && !demuxer->stream->eof);
1103
1104         ds_free_packs(demuxer->video);
1105         demuxer->stream->eof=0;
1106         stream_seek(demuxer->stream, pos);
1107         mp_msg(MSGT_DEMUX,MSGL_INFO,"MPEG packet stats: p100: %d  p101: %d p1B6: %d p12x: %d sli: %d a: %d b: %d c: %d idr: %d sps: %d pps: %d\n",
1108             num_elementary_packets100, num_elementary_packets101,
1109             num_elementary_packets1B6, num_elementary_packets12x,
1110             num_h264_slice, num_h264_dpa, num_h264_dpb, num_h264_dpc,
1111             num_h264_idr, num_h264_sps, num_h264_pps);
1112
1113         if(num_elementary_packets1B6>3 && num_elementary_packets12x>=1 &&
1114             num_elementary_packets100<=num_elementary_packets12x)
1115             sh_video->format = 0x10000004;
1116         else if((num_h264_slice>3 || (num_h264_dpa>3 && num_h264_dpb>3 && num_h264_dpc>3)) &&
1117             num_h264_sps>=1 && num_h264_pps>=1 && num_h264_idr>=1 &&
1118             num_elementary_packets1B6==0)
1119                 sh_video->format = 0x10000005;
1120         else sh_video->format = 0x10000002;
1121     }
1122
1123     return demuxer;
1124 }
1125
1126
1127 const demuxer_desc_t demuxer_desc_mpeg_ps = {
1128   "MPEG PS demuxer",
1129   "mpegps",
1130   "MPEG-PS",
1131   "Arpi?",
1132   "Mpeg",
1133   DEMUXER_TYPE_MPEG_PS,
1134   0, // unsafe autodetect
1135   demux_mpg_probe,
1136   demux_mpg_fill_buffer,
1137   demux_mpg_ps_open,
1138   demux_close_mpg,
1139   demux_seek_mpg,
1140   demux_mpg_control,
1141 };
1142
1143
1144 const demuxer_desc_t demuxer_desc_mpeg_pes = {
1145   "MPEG PES demuxer",
1146   "mpegpes",
1147   "MPEG-PES",
1148   "Arpi?",
1149   "Mpeg",
1150   DEMUXER_TYPE_MPEG_PES,
1151   0, // unsafe autodetect
1152   demux_mpg_pes_probe,
1153   demux_mpg_fill_buffer,
1154   demux_mpg_ps_open,
1155   demux_close_mpg,
1156   demux_seek_mpg,
1157   demux_mpg_control,
1158 };
1159
1160
1161 const demuxer_desc_t demuxer_desc_mpeg_gxf = {
1162   "MPEG ES in GXF demuxer",
1163   "mpeggxf",
1164   "MPEG-ES in GXF",
1165   "Reimar Doeffinger",
1166   "Mpeg",
1167   DEMUXER_TYPE_MPEG_GXF,
1168   0, // hack autodetection
1169   NULL,
1170   demux_mpg_gxf_fill_buffer,
1171   demux_mpg_gxf_open,
1172   NULL,
1173   NULL,
1174   NULL
1175 };
1176
1177 const demuxer_desc_t demuxer_desc_mpeg_es = {
1178   "MPEG ES demuxer",
1179   "mpeges",
1180   "MPEG-ES",
1181   "Arpi?",
1182   "Mpeg",
1183   DEMUXER_TYPE_MPEG_ES,
1184   0, // hack autodetection
1185   NULL,
1186   demux_mpg_es_fill_buffer,
1187   demux_mpg_es_open,
1188   demux_close_mpg,
1189   demux_seek_mpg,
1190   demux_mpg_control,
1191 };
1192
1193
1194 const demuxer_desc_t demuxer_desc_mpeg4_es = {
1195   "MPEG4 ES demuxer",
1196   "mpeg4es",
1197   "MPEG-ES",
1198   "Arpi?",
1199   "Mpeg",
1200   DEMUXER_TYPE_MPEG4_ES,
1201   0, // hack autodetection
1202   NULL,
1203   demux_mpg_es_fill_buffer,
1204   demux_mpg_es_open,
1205   demux_close_mpg,
1206   demux_seek_mpg,
1207   demux_mpg_control,
1208 };
1209
1210
1211 const demuxer_desc_t demuxer_desc_h264_es = {
1212   "H.264 ES demuxer",
1213   "h264es",
1214   "H264-ES",
1215   "Arpi?",
1216   "Mpeg",
1217   DEMUXER_TYPE_H264_ES,
1218   0, // hack autodetection
1219   NULL,
1220   demux_mpg_es_fill_buffer,
1221   demux_mpg_es_open,
1222   demux_close_mpg,
1223   demux_seek_mpg,
1224   demux_mpg_control,
1225 };