demuxer.cc

   1 /*
   2     Copyright 2005-2008 Mark Calderbank
   3     Copyright 2007 Marten Richter (AC3 support)
   4
   5     This file is part of VOMP.
   6
   7     VOMP is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     VOMP 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
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with VOMP; if not, write to the Free Software Foundation, Inc.,
  19     51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  20 */
  21
  22 #include "demuxer.h"
  23
  24 #include "callback.h"
  25 #include "dvbsubtitles.h"
  26 #include "log.h"
  27
  28 #include <cstdlib>
  29
  30 #include <math.h>
  31
  32 #define DEMUXER_SEQ_HEAD 0x000001B3
  33 #define DEMUXER_PIC_HEAD 0x00000101
  34 #define DEMUXER_SEQ_EXT_HEAD 0x000001B5
  35
  36 #define DEMUXER_H264_ACCESS_UNIT 0x00000109
  37 #define DEMUXER_H264_SEQ_PARAMETER_SET 0x00000107
  38 #define DEMUXER_H264_SUB_ENHANCEMENT_INF 0x00000106
  39 #define DEMUXER_H264_CODED_SLICE_IDR 0x00000105
  40 #define DEMUXER_H264_CODED_SLICE_NON_IDR 0x00000101
  41
  42 #define SEEK_THRESHOLD 150000 // About 1.5 seconds
  43
  44 // Statics
  45 const int Demuxer::FrameRates[9] = { 0, 23, 24, 25, 29, 30, 50, 59, 60 };
  46 Demuxer* Demuxer::instance = NULL;
  47
  48 class NALUUnit {
  49 public:
  50     NALUUnit(const UCHAR* buf,UINT length_buf);
  51     ~NALUUnit();
  52
  53 inline    UINT getBits(UINT num_bits);
  54     UINT getUe();
  55     int getSe();
  56     bool isEonalu() {return eonalu;};
  57     int getPos(){return pos;};
  58
  59 protected:
  60     UCHAR* nalu_buf;
  61     UINT nalu_length;
  62     UINT pos;
  63     UCHAR bit_pos;
  64     UCHAR working_byte;
  65     UINT last_bytes;
  66     bool eonalu;
  67 };
  68
  69 NALUUnit::NALUUnit(const UCHAR *buf, UINT length_buf)
  70 {
  71     nalu_length=0;
  72     nalu_buf=NULL;
  73     pos=0;
  74     bit_pos=0;
  75     working_byte=0;
  76     last_bytes=0;
  77     eonalu=false;
  78
  79     UINT nalu_start=0;
  80     UINT nalu_end=0;
  81     UINT pattern =(((UINT)buf[ 0] << 16) |
  82                    ((UINT)buf[1] <<  8) |
  83                     (UINT)buf[2]  );
  84     nalu_start=3;
  85     while (pattern != 0x000001)
  86     {
  87         if (++nalu_start >= length_buf) return;
  88         pattern = ((pattern << 8) | buf[nalu_start])&0x00FFFFFF;
  89     }
  90     nalu_end=nalu_start+1;
  91     if (nalu_end >= length_buf) return; // input buffer too small. corrupt data? ignore.
  92     pattern = ((pattern << 8) | buf[nalu_end])&0x00FFFFFF;
  93
  94     while (pattern != 0x000001 && pattern != 0x000000)
  95     {
  96         if (++nalu_end >= length_buf) { nalu_end+=3;break;};
  97         pattern = ((pattern << 8) | buf[nalu_end])&0x00FFFFFF;
  98     }
  99     nalu_end-=3;
 100     nalu_end=min(length_buf-1,nalu_end);
 101     if (nalu_end <= nalu_start) return; // input buffer too small. corrupt data? ignore.
 102     nalu_length=nalu_end-nalu_start;
 103     nalu_buf=(UCHAR*)malloc(nalu_length);
 104     memcpy(nalu_buf,buf+nalu_start,nalu_length);
 105     pos=1;
 106 }
 107
 108 NALUUnit::~NALUUnit()
 109 {
 110     if (nalu_buf) free(nalu_buf);
 111 }
 112
 113 inline UINT NALUUnit::getBits(UINT num_bits)
 114 {
 115     if (num_bits==0) return 0; //???
 116     UINT remain_bits=num_bits;
 117     UINT work=0;
 118     //May be slow, but should work!
 119     while (remain_bits>0) {
 120         if (bit_pos==0) {
 121             if (pos<nalu_length)
 122             {
 123                 last_bytes=(last_bytes<<8) & nalu_buf[pos];
 124                 if ((last_bytes & 0x00FFFFFF) == 0x000003) pos++; //emulation prevention byte
 125                  if (pos<nalu_length)
 126                  {
 127                      working_byte=nalu_buf[pos];
 128                      pos++;
 129                  }
 130                  else
 131                  {
 132                      working_byte=0;
 133                      eonalu=true;
 134                  }
 135             }
 136             else
 137             {
 138                 working_byte=0;
 139                 eonalu=true;
 140             }
 141
 142         }
 143         UINT fetch_bits=min(remain_bits,8-bit_pos);
 144         work=work <<fetch_bits;
 145         //work|=((working_byte>>bit_pos) & (0xFF>>(8-fetch_bits)));
 146         work|=(working_byte &(0xFF>>(bit_pos)))>>(8-fetch_bits-bit_pos);
 147         remain_bits-=fetch_bits;
 148         bit_pos=(bit_pos+fetch_bits)%8;
 149     }
 150     return work;
 151 }
 152
 153 UINT NALUUnit::getUe()
 154 {
 155     int leadbits=-1;
 156     bool bit;
 157     for( bit = 0; !bit && !eonalu; leadbits++ )
 158         bit = getBits(1);
 159     if (eonalu) return 0;
 160     return ((1 << leadbits)-1)+getBits(leadbits);
 161 }
 162
 163 int NALUUnit::getSe()
 164 {
 165     UINT input=getUe();
 166     if (input==0) return 0;
 167     int output=((input+1)>>1);
 168     if (input & 0x1) output*=-1;
 169     return output;
 170 }
 171
 172
 173
 174 static const int PESPacket_initial_size = 2000;
 175
 176 // PESPacket methods
 177 PESPacket::PESPacket()
 178 {
 179   data_size = PESPacket_initial_size;
 180   data = (UCHAR*)malloc(data_size);
 181   data[0] = 0x00;
 182   data[1] = 0x00;
 183   data[2] = 0x01;
 184   init(0);
 185 }
 186
 187 PESPacket::PESPacket(const PESPacket& packet)
 188 {
 189   copyFrom(packet);
 190 }
 191
 192 PESPacket& PESPacket::operator=(const PESPacket& packet)
 193 {
 194   if (this != &packet)
 195   {
 196     if (data) free(data);
 197     copyFrom(packet);
 198   }
 199   return *this;
 200 }
 201
 202 PESPacket::~PESPacket()
 203 {
 204   if (data) free(data);
 205 }
 206
 207 void PESPacket::copyFrom(const PESPacket& packet)
 208 {
 209   length = packet.length;
 210   size = packet.size;
 211   packetType = packet.packetType;
 212   substream = packet.substream;
 213   seq_header = packet.seq_header;
 214   data_size = size;
 215   data = (UCHAR*)malloc(data_size);
 216   memcpy(data, packet.data, data_size);
 217 }
 218
 219 void PESPacket::init(UCHAR type, UCHAR sub)
 220 {
 221   length = 0;
 222   size = 6;
 223   data[4] = data[5] = 0;
 224   data[3] = type;
 225   packetType = type;
 226   substream = sub;
 227   seq_header = 1; // Unknown seq_header status
 228
 229 }
 230
 231 void PESPacket::truncate()
 232 {
 233   init(packetType,substream);
 234 }
 235
 236
 237
 238 int PESPacket::write(const UCHAR *buf, int len)
 239 {
 240
 241
 242   if (size + len > 0x10000) return 0;
 243   if (size + len > data_size)
 244   { // Reallocate
 245     UINT new_data_size = max(data_size + data_size / 2, data_size + len);
 246     if (new_data_size > 0x10000) new_data_size = 0x10000;
 247     data_size = new_data_size;
 248     data = (UCHAR*)realloc(data, data_size);
 249   }
 250   memcpy(data + size, buf, len);
 251   length += len;
 252   size += len;
 253   data[4] = (length >> 8);
 254   data[5] = (length & 0xFF);
 255   // We have added data - reset seq_header indicator if necessary
 256   if (seq_header == 0) seq_header = 1; // Reset to 'unknown'
 257   return 1;
 258 }
 259
 260 ULLONG PESPacket::getPTS() const
 261 {
 262   if ( ( (packetType >= Demuxer::PESTYPE_AUD0 &&
 263           packetType <= Demuxer::PESTYPE_AUDMAX)
 264          ||
 265          (packetType >= Demuxer::PESTYPE_VID0 &&
 266           packetType <= Demuxer::PESTYPE_VIDMAX)
 267    ||
 268           packetType == Demuxer::PESTYPE_PRIVATE_1
 269        )
 270        && size >= 14 && data[7] & 0x80)
 271   {
 272     return ( (ULLONG)(data[ 9] & 0x0E) << 29) |
 273            ( (ULLONG)(data[10])        << 22 ) |
 274            ( (ULLONG)(data[11] & 0xFE) << 14 ) |
 275            ( (ULLONG)(data[12])        <<  7 ) |
 276            ( (ULLONG)(data[13] & 0xFE) >>  1 );
 277   }
 278   else return PTS_INVALID;
 279 }
 280
 281 UCHAR PESPacket::operator[] (UINT index) const
 282 {
 283   if (index >= size)
 284     return 0;
 285   else
 286     return data[index];
 287 }
 288
 289 UINT PESPacket::findPictureHeader(bool h264) const
 290 {
 291   if (size < 12) return 0;
 292   UINT pattern = ( ((UINT)data[ 8] << 24) |
 293                    ((UINT)data[ 9] << 16) |
 294                    ((UINT)data[10] <<  8) |
 295                     (UINT)data[11]  );
 296   UINT pos = 11;
 297   if (h264) {
 298
 299           while (pattern != DEMUXER_H264_ACCESS_UNIT)
 300           {
 301                   if (++pos >= size) return 0;
 302                   pattern = (pattern << 8) | data[pos];
 303           }
 304           return pos-3;
 305   } else {
 306           while (pattern != DEMUXER_PIC_HEAD)
 307           {
 308                   if (++pos >= size) return 0;
 309                   pattern = (pattern << 8) | data[pos];
 310           }
 311           return pos-3;
 312   }
 313 }
 314
 315 UINT PESPacket::countPictureHeaders(bool h264, struct PictCountInfo& pinfo) const
 316 {
 317   if (size < 12) return 0;
 318   UINT pattern = ( ((UINT)data[ 8] << 24) |
 319                    ((UINT)data[ 9] << 16) |
 320                    ((UINT)data[10] <<  8) |
 321                     (UINT)data[11]  );
 322   UINT pos = 11;
 323   UINT count=0;
 324   if (h264) {
 325           //inspired by vdr algorithm for frame couting by Klaus Schmidinger
 326           while (pos<size)
 327           {
 328           pos++;
 329                   pattern = (pattern << 8) | data[pos];
 330                   if ((pattern &0xFFFFFF00)==0x00000100) {
 331                           UINT testpattern=(pattern& 0xFFFFFF1f);
 332                           if (testpattern==DEMUXER_H264_ACCESS_UNIT) pinfo.hasaccessunit=true;
 333                           else if (testpattern==DEMUXER_H264_SEQ_PARAMETER_SET ) {
 334                                   pinfo.hassps=true;
 335                                   NALUUnit nalu(data+pos-3,getSize()-pos+3);
 336                                   int profile=nalu.getBits(8);
 337                                   nalu.getBits(8); //constraints
 338                                   nalu.getBits(8); //level_idc
 339                                   nalu.getUe(); //seq_parameter_set_id
 340                                   int chroma=1;
 341                               pinfo.separate_color_plane_flag=0;
 342                                   if (profile==100 || profile==110 || profile==122 || profile==144)
 343                                   {
 344                                       chroma=nalu.getUe();
 345                                       if (chroma==3)
 346                                       {
 347                                           pinfo.separate_color_plane_flag=nalu.getBits(1);
 348                                       }
 349                                       nalu.getUe(); //bit depth lume
 350                                       nalu.getUe(); //bit depth chrome
 351                                       nalu.getBits(1);
 352                                       if (nalu.getBits(1))
 353                                       {
 354                                           for (int i=0;i<8;i++){
 355                                                   if (nalu.getBits(1))
 356                                                   {
 357                                                           if (i<6)
 358                                                           {
 359                                                                   UINT lastscale=8;
 360                                                                   UINT nextscale=8;
 361                                                                   for (int j=0;j<16;j++) {
 362                                                                           if (nextscale!=0) {
 363                                                                                   UINT delta=nalu.getSe();
 364                                                                                   nextscale=(lastscale+delta+256)%256;
 365                                                                           }
 366                                                                           lastscale=(nextscale==0)?lastscale:nextscale;
 367                                                                   }
 368                                                           }
 369                                                           else
 370                                                           {
 371                                                                   UINT lastscale=8;
 372                                                                   UINT nextscale=8;
 373                                                                   for (int j=0;j<64;j++) {
 374                                                                           if (nextscale!=0) {
 375                                                                                   UINT delta=nalu.getSe();
 376                                                                                   nextscale=(lastscale+delta+256)%256;
 377                                                                           }
 378                                                                           lastscale=(nextscale==0)?lastscale:nextscale;
 379                                                                   }
 380                                                           }
 381                                                   }
 382                                           }
 383                                       }
 384                                   }
 385
 386                                   UINT checkMaxFrameNum = nalu.getUe() + 4;  //log2framenum
 387
 388                                   if (checkMaxFrameNum < 13) {
 389                                         pinfo.log2_max_frame_num = checkMaxFrameNum;
 390                                   }
 391                                   else {
 392                                         pattern=0xFFFFFF;
 393                                         pos+=nalu.getPos();
 394                                         continue;
 395                                   }
 396
 397                                   UINT temp=nalu.getUe();
 398                                   if (temp==0) //pict order
 399                                           nalu.getUe();
 400                                   else if (temp==1) {
 401                                           nalu.getBits(1);
 402                                           nalu.getSe();
 403                                           nalu.getSe();
 404                                           UINT temp2=nalu.getUe();
 405                                           for (UINT i=0;i<temp2;i++)
 406                                                   nalu.getSe();
 407                                   }
 408                                   nalu.getUe(); //Num refframes
 409                                   nalu.getBits(1);
 410                                   nalu.getUe();
 411                                   nalu.getUe();
 412                                   pinfo.frame_mbs_only_flag=nalu.getBits(1);
 413                                   pattern=0xFFFFFF;
 414                                   pos+=nalu.getPos();
 415
 416                           } if (testpattern==DEMUXER_H264_CODED_SLICE_IDR || testpattern==DEMUXER_H264_CODED_SLICE_NON_IDR ) {
 417                                 /*  Log::getInstance()->log("Demuxer", Log::ERR,
 418                                                                 "Has slice %d %d %d %d %d",pinfo.hasaccessunit, pinfo.hassps,pinfo.frame_mbs_only_flag,pinfo.separate_color_plane_flag,
 419                                                                 pinfo.log2_max_frame_num);*/
 420                                   if (pinfo.hasaccessunit && pinfo.hassps) {
 421
 422                                           NALUUnit nalu(data+pos-3,getSize()-pos+3);
 423                                           nalu.getUe();// first_mb_in_slice
 424                                           nalu.getUe();//sliectype
 425                                           if (!pinfo.frame_mbs_only_flag) {
 426                                                   nalu.getUe(); //pic_paramter_set_id
 427                                                   if (pinfo.separate_color_plane_flag) nalu.getBits(2);
 428                                                   nalu.getBits(pinfo.log2_max_frame_num);
 429                                                   //if (!frame_mbs_only_flag)
 430                                                   if (nalu.getBits(1)) { //field_picture
 431                                                           if (!nalu.getBits(1)) { //bottom_field
 432                                                                   count++;
 433                                                           }
 434                                                   } else count++;
 435
 436                                           } else count++;
 437                                           pattern=0xFFFFFF;
 438                                           pos+=nalu.getPos();
 439                                           pinfo.hasaccessunit=false;
 440                                   }
 441                           }
 442                   }
 443           }
 444           return count;
 445   } else {
 446       while (pos<size)
 447           {
 448           pos++;
 449                   pattern = (pattern << 8) | data[pos];
 450           if (pattern==DEMUXER_PIC_HEAD) count++;
 451           }
 452           return count;
 453   }
 454 }
 455
 456 UINT PESPacket::findSeqHeader(bool h264) const
 457 {
 458   if (seq_header != 1) return seq_header;
 459   if (size < 12) return 0;
 460   UINT pattern = ( ((UINT)data[ 8] << 24) |
 461                    ((UINT)data[ 9] << 16) |
 462                    ((UINT)data[10] <<  8) |
 463                     (UINT)data[11]  );
 464   UINT pos = 11;
 465   if (h264) {
 466       while ((pattern & 0xFFFFFF1F) != DEMUXER_H264_SEQ_PARAMETER_SET)
 467           {
 468                   if (++pos >= size)
 469                   {
 470                           seq_header = 0;
 471                           return 0;
 472                   }
 473                   pattern = (pattern << 8) | data[pos];
 474           }
 475           seq_header = pos - 3;
 476   }
 477   else
 478   {
 479           while (pattern != DEMUXER_SEQ_HEAD)
 480           {
 481                   if (++pos >= size)
 482                   {
 483                           seq_header = 0;
 484                           return 0;
 485                   }
 486                   pattern = (pattern << 8) | data[pos];
 487           }
 488           seq_header = pos - 3;
 489   }
 490   return seq_header;
 491 }
 492
 493 UINT PESPacket::findSeqExtHeader(bool h264) const
 494 {
 495   if (seq_header != 1) return seq_header;
 496   if (size < 12) return 0;
 497   UINT pattern = ( ((UINT)data[ 8] << 24) |
 498                    ((UINT)data[ 9] << 16) |
 499                    ((UINT)data[10] <<  8) |
 500                     (UINT)data[11]  );
 501   UINT pos = 11;
 502   if (h264) {
 503       while ((pattern & 0xFFFFFF1F) != DEMUXER_H264_SUB_ENHANCEMENT_INF)
 504           {
 505                   if (++pos >= size)
 506                   {
 507                           seq_header = 0;
 508                           return 0;
 509                   }
 510                   pattern = (pattern << 8) | data[pos];
 511           }
 512           seq_header = pos - 3;
 513   }
 514   else
 515   {
 516           while (pattern != DEMUXER_SEQ_EXT_HEAD && (data[pos+1]&0xf0)!=0x10)
 517           {
 518                   if (++pos >= (size-1))
 519                   {
 520                           seq_header = 0;
 521                           return 0;
 522                   }
 523                   pattern = (pattern << 8) | data[pos];
 524           }
 525           seq_header = pos - 3;
 526   }
 527   return seq_header;
 528 }
 529
 530 // Demuxer methods
 531 Demuxer::Demuxer()
 532 {
 533   if (instance) return;
 534   instance = this;
 535   initted = false;
 536   callback = NULL;
 537   arcnt = 0;
 538   vid_seeking = aud_seeking = false;
 539   video_pts = audio_pts = 0;
 540   ispre_1_3_19 = false;
 541   packetnum=0;
 542   h264 = false;
 543   fps = 25.0;
 544   astreamtype=4;
 545   livetv=false;
 546 }
 547
 548 Demuxer::~Demuxer()
 549 {
 550   shutdown();
 551   instance = NULL;
 552 }
 553
 554 Demuxer* Demuxer::getInstance()
 555 {
 556   return instance;
 557 }
 558
 559 int Demuxer::init(Callback* tcallback, DrainTarget* audio, DrainTarget* video, DrainTarget* teletext,
 560                   ULONG demuxMemoryV, ULONG demuxMemoryA, ULONG demuxMemoryT,double infps, DVBSubtitles* tsubtitles)
 561 {
 562   if (!initted)
 563   {
 564     if ( !videostream.init(video, demuxMemoryV) ||
 565          !audiostream.init(audio, demuxMemoryA) ||
 566          !teletextstream.init(teletext, demuxMemoryT))
 567     {
 568       Log::getInstance()->log("Demuxer", Log::CRIT,
 569                               "Failed to initialize demuxer");
 570       shutdown();
 571       return 0;
 572     }
 573   }
 574   if (teletext) {
 575       isteletextdecoded = true;
 576   } else {
 577       isteletextdecoded = false;
 578   }
 579   fps=infps;
 580   reset();
 581   initted = true;
 582   subtitles = tsubtitles;
 583   callback = tcallback;
 584   return 1;
 585 }
 586
 587 void Demuxer::reset()
 588 {
 589   Log::getInstance()->log("Demuxer", Log::DEBUG, "Reset called");
 590   flush();
 591   video_current = audio_current = teletext_current = subtitle_current = -1;
 592   horizontal_size = vertical_size = 0;
 593   interlaced=true; // default is true
 594   aspect_ratio = (enum AspectRatio) 0;
 595   parx=1;
 596   pary=1;
 597   frame_rate = bit_rate = 0;
 598   ispre_1_3_19 = false;
 599   h264 = false;
 600   packetnum=0;
 601   astreamtype=4;
 602   livetv=false;
 603
 604   for (int i = 0; i <= (PESTYPE_AUDMAX - PESTYPE_AUD0); i++)
 605   {
 606     avail_mpaudchan[i] = false;
 607   }
 608   for (int i = 0; i <= (PESTYPE_SUBSTREAM_AC3MAX - PESTYPE_SUBSTREAM_AC30); i++)
 609   {
 610     avail_ac3audchan[i] = false;
 611   }
 612   for (int i = 0; i <= (PESTYPE_SUBSTREAM_DVBSUBTITLEMAX - PESTYPE_SUBSTREAM_DVBSUBTITLE0); i++)
 613   {
 614     avail_dvbsubtitlechan[i] = false;
 615   }
 616 }
 617
 618 int Demuxer::shutdown()
 619 {
 620   videostream.shutdown();
 621   audiostream.shutdown();
 622   teletextstream.shutdown();
 623   initted = false;
 624   return 1;
 625 }
 626
 627 void Demuxer::flush()
 628 {
 629   Log::getInstance()->log("Demuxer", Log::DEBUG, "Flush called");
 630
 631   videostream.flush();
 632   audiostream.flush();
 633   teletextstream.flush();
 634 }
 635
 636 void Demuxer::flushAudio()
 637 {
 638   audiostream.flush();
 639 }
 640
 641 void Demuxer::seek()
 642 {
 643   vid_seeking = aud_seeking = true;
 644   video_pts = audio_pts = teletext_pts = 0;
 645 }
 646
 647 void Demuxer::setAudioStream(int id)
 648 {
 649   audio_current = id;
 650 }
 651
 652 void Demuxer::setVideoStream(int id)
 653 {
 654   video_current = id;
 655 }
 656
 657 void Demuxer::setTeletextStream(int id)
 658 {
 659   teletext_current = id;
 660 }
 661
 662 void Demuxer::setDVBSubtitleStream(int id)
 663 {
 664   subtitle_current = id;
 665 }
 666
 667 void Demuxer::setAspectRatio(enum AspectRatio ar, int taspectx, int taspecty)
 668 {
 669   if ((aspect_ratio != ar) || (parx !=  taspectx) || (pary != taspecty) )
 670   {
 671     Log::getInstance()->log("Demux", Log::DEBUG,
 672                             "Aspect ratio difference signalled");
 673     if (++arcnt > 3) // avoid changing aspect ratio if glitch in signal
 674     {
 675       arcnt = 0;
 676       aspect_ratio = ar;
 677       parx=taspectx;
 678       pary=taspecty;
 679       if (callback) callback->call(this);
 680     }
 681   }
 682   else
 683     arcnt = 0;
 684 }
 685
 686 bool Demuxer::writeAudio(bool * dataavail)
 687 {
 688   return audiostream.drain(dataavail);
 689 }
 690
 691 bool Demuxer::writeVideo(bool * dataavail)
 692 {
 693   return videostream.drain(dataavail);
 694 }
 695
 696 bool Demuxer::writeTeletext(bool * dataavail)
 697 {
 698    return teletextstream.drain(dataavail);
 699 }
 700
 701 bool Demuxer::submitPacket(PESPacket& packet)
 702 {
 703   UINT sent = 0;
 704   UCHAR packet_type = packet.getPacketType();
 705   const UCHAR* packetdata = packet.getData();
 706   if (packet_type >= PESTYPE_VID0 && packet_type <= PESTYPE_VIDMAX)
 707   {
 708     if (video_current == -1) video_current = packet_type;
 709     if (video_current == packet_type && !vid_seeking)
 710         {
 711         sent = videostream.put(&packetdata[0], packet.getSize(), h264?MPTYPE_VIDEO_H264:MPTYPE_VIDEO_MPEG2,packetnum);
 712         if (sent) packetnum++;
 713         }
 714         else
 715       sent = packet.getSize();
 716   }
 717   else if (packet_type >= PESTYPE_AUD0 && packet_type <= PESTYPE_AUDMAX)
 718   {
 719
 720     if (audio_current == -1) audio_current = packet_type;
 721     avail_mpaudchan[packet_type - PESTYPE_AUD0] = true;
 722     if (audio_current == packet_type && !aud_seeking)
 723         {
 724       UCHAR type=MPTYPE_MPEG_AUDIO;
 725       switch (astreamtype)
 726       {
 727       case 3:
 728       case 4:
 729           type=MPTYPE_MPEG_AUDIO; break;
 730       case 0x11:
 731           type=MPTYPE_AAC_LATM; break;
 732       };
 733       sent = audiostream.put(&packetdata[0], packet.getSize(), type,packetnum);
 734           if (sent)  packetnum++;
 735         }
 736         else
 737       sent = packet.getSize();
 738   }
 739   else if (packet_type == PESTYPE_PRIVATE_1 &&
 740            packet.getSubstream() >= PESTYPE_SUBSTREAM_AC30 &&
 741            packet.getSubstream() <= PESTYPE_SUBSTREAM_AC3MAX)
 742   {
 743     avail_ac3audchan[packet.getSubstream() - PESTYPE_SUBSTREAM_AC30] = true;
 744     if (packet.getSubstream() == audio_current)
 745     {
 746       sent = audiostream.put(&packetdata[0], packet.getSize(), (ispre_1_3_19 || livetv)? MPTYPE_AC3_PRE13 : MPTYPE_AC3,packetnum);
 747           if (sent) packetnum++;
 748     }
 749     else
 750     {
 751       sent = packet.getSize();
 752     }
 753   }
 754   else if (packet_type == PESTYPE_PRIVATE_1 &&
 755            packet.getSubstream() >= PESTYPE_SUBSTREAM_DVBSUBTITLE0 &&
 756            packet.getSubstream() <= PESTYPE_SUBSTREAM_DVBSUBTITLEMAX)
 757   {
 758     avail_dvbsubtitlechan[packet.getSubstream()-PESTYPE_SUBSTREAM_DVBSUBTITLE0]=true;
 759     if (subtitle_current == -1) subtitle_current = packet.getSubstream();
 760     if (subtitles && packet.getSubstream()==subtitle_current)
 761     {
 762          subtitles->put(packet);
 763     }
 764     sent = packet.getSize();
 765   }
 766   else if (isteletextdecoded  && packet_type == PESTYPE_PRIVATE_1 &&
 767            packet.getSubstream() >= PESTYPE_SUBSTREAM_TELETEXT0 &&
 768            packet.getSubstream() <= PESTYPE_SUBSTREAM_TELETEXTMAX)
 769   {
 770
 771     if (teletext_current == -1) teletext_current = packet.getSubstream();
 772     if (teletext_current == packet.getSubstream())
 773     {
 774         sent = teletextstream.put(&packetdata[0], packet.getSize(), MPTYPE_TELETEXT,packetnum);
 775     }
 776     else
 777     {
 778         sent = packet.getSize();
 779     }
 780   }
 781   else
 782   {
 783     sent = packet.getSize();
 784   }
 785
 786   if (sent < packet.getSize()) // Stream is full.
 787     return false;
 788   else
 789     return true;
 790 }
 791
 792 void Demuxer::parsePacketDetails(PESPacket& packet)
 793 {
 794     if (packet.getPacketType() >= PESTYPE_AUD0 &&
 795         packet.getPacketType() <= PESTYPE_AUDMAX)
 796     {
 797         // Extract audio PTS if it exists
 798         if (packet.hasPTS())
 799         {
 800             audio_pts = packet.getPTS();
 801             // We continue to seek on the audio if the video PTS that we
 802             // are trying to match is ahead of the audio PTS by at most
 803             // SEEK_THRESHOLD. We consider the possibility of PTS wrap.
 804             if (aud_seeking && !vid_seeking &&
 805                 !( (video_pts_seek > audio_pts &&
 806                 video_pts_seek - audio_pts < SEEK_THRESHOLD)
 807                 ||
 808                 (video_pts_seek < audio_pts &&
 809                 video_pts_seek + (1LL<<33) - audio_pts < SEEK_THRESHOLD) ))
 810             {
 811                 aud_seeking = 0;
 812                 Log::getInstance()->log("Demuxer", Log::DEBUG,
 813                     "Leaving  audio sync: Audio PTS = %llu", audio_pts);
 814             }
 815         }
 816     }
 817     else if (packet.getPacketType() == PESTYPE_PRIVATE_1) // Private stream
 818     {
 819         if (!livetv) {
 820                 //Inspired by vdr's device.c
 821                 int payload_begin = packet[8]+9;
 822                 unsigned char substream_id = packet[payload_begin];
 823                 unsigned char substream_type = substream_id & 0xF0;
 824                 unsigned char substream_index = substream_id & 0x1F;
 825                 pre_1_3_19_Recording: //This is for old recordings stuff and live TV
 826                 if (ispre_1_3_19)
 827                 {
 828                         int old_substream=packet.getSubstream();
 829                         if (old_substream){ //someone else already set it, this is live tv
 830                                 substream_id = old_substream;
 831                                 substream_type = substream_id & 0xF0;
 832                                 substream_index = substream_id & 0x1F;
 833                         } else {
 834                                 substream_id = PESTYPE_PRIVATE_1;
 835                                 substream_type = 0x80;
 836                                 substream_index = 0;
 837                         }
 838
 839                 }
 840                 switch (substream_type)
 841                 {
 842                 case 0x20://SPU
 843                 case 0x30://SPU
 844                         packet.setSubstream(substream_id);
 845                         break;
 846                 case 0xA0: //LPCM //not supported yet, is there any LPCM transmissio out there?
 847                         break;
 848                 case 0x80: //ac3, currently only one ac3 track per recording supported
 849                         packet.setSubstream(substream_type+substream_index);
 850
 851                         // Extract audio PTS if it exists
 852                         if (packet.hasPTS())
 853                         {
 854                                 audio_pts = packet.getPTS();
 855                                 // We continue to seek on the audio if the video PTS that we
 856                                 // are trying to match is ahead of the audio PTS by at most
 857                                 // SEEK_THRESHOLD. We consider the possibility of PTS wrap.
 858                                 if (aud_seeking && !vid_seeking &&
 859                                                 !( (video_pts_seek > audio_pts &&
 860                                                                 video_pts_seek - audio_pts < SEEK_THRESHOLD)
 861                                                                 ||
 862                                                                 (video_pts_seek < audio_pts &&
 863                                                                                 video_pts_seek + (1LL<<33) - audio_pts < SEEK_THRESHOLD) ))
 864                                 {
 865                                         aud_seeking = 0;
 866                                         Log::getInstance()->log("Demuxer", Log::DEBUG, "Leaving  audio sync: Audio PTS = %llu", audio_pts);
 867                                 }
 868                         }
 869                         break;
 870                 case 0x10: //Teletext Is this correct?
 871                         packet.setSubstream(substream_id);
 872                         // Extract teletxt PTS if it exists
 873                         if (packet.hasPTS())
 874                         {
 875                                 teletext_pts = packet.getPTS();
 876                         }
 877                         break;
 878                 default:
 879                         if (!ispre_1_3_19)
 880                         {
 881                                 ispre_1_3_19=true; //switching to compat mode and live tv mode
 882                                 goto pre_1_3_19_Recording;
 883                         }
 884                         else
 885                         {
 886                                 packet.setSubstream(0);
 887                         }
 888                         break;
 889                 }
 890         }
 891     }
 892     else if (packet.getPacketType() >= PESTYPE_VID0 &&
 893         packet.getPacketType() <= PESTYPE_VIDMAX)
 894     {
 895         // Extract video PTS if it exists
 896         if (packet.hasPTS()) video_pts = packet.getPTS();
 897
 898         // If there is a sequence header, extract information
 899         UINT pos = packet.findSeqHeader(h264);
 900         if (pos > 1)
 901         {
 902             if (!h264) {
 903                 pos += 4;
 904                 if (pos+6 >= packet.getSize()) return;
 905                 horizontal_size = ((int)packet[pos] << 4) | ((int)packet[pos+1] >> 4);
 906
 907                 vertical_size = (((int)packet[pos+1] & 0xf) << 8) | (int)packet[pos+2];
 908
 909                 enum AspectRatio aspect=(enum AspectRatio)(packet[pos+3] >> 4);
 910                 int aspectx=1;
 911                 int aspecty=1;
 912                 const int aspectDAR[]={0,1,1,1,4,3,16,9,221,100};
 913                 int aspectDARx=aspectDAR[aspect*2];
 914                 int aspectDARy=aspectDAR[aspect*2+1];
 915
 916                 aspectx=aspectDARx*vertical_size;
 917                 aspecty=aspectDARy*horizontal_size;
 918
 919                 int commona;
 920                 int commonb;
 921                // Log::getInstance()->log("Demuxer", Log::DEBUG, "PAR test1 %d %d %d %d ", aspectx,aspecty,commona,commonb);
 922                 commona=aspectx;
 923                 commonb=aspecty;
 924
 925                 while (commonb) {
 926                         int temp=commonb;
 927                         commonb=commona%commonb;
 928                         commona=temp;
 929                 }
 930                 aspectx=aspectx/commona;
 931                 aspecty=aspecty/commona;
 932                 //Log::getInstance()->log("Demuxer", Log::DEBUG, "PAR test2 %d %d %d %d %d %d %d", aspectx,aspecty,aspectDARx,aspectDARy,horizontal_size,vertical_size,commona);
 933
 934                 setAspectRatio(aspect,aspectx,aspecty);
 935                 frame_rate = packet[pos+3] & 0x0f;
 936                 if (frame_rate >= 1 && frame_rate <= 8)
 937                     frame_rate = FrameRates[frame_rate];
 938                 else
 939                     frame_rate = 0;
 940                 bit_rate = ((int)packet[pos+4] << 10) |
 941                     ((int)packet[pos+5] << 2) |
 942                     ((int)packet[pos+6] >> 6);
 943             }
 944             else
 945             {
 946                 /* Chris and Mark I know this is ugly, should we move this to a method  of PESPacket or to NALUUnit what would be better?
 947                 This looks so ugly since the header includes variable length parts and I have to parse through the whole header to get the wanted information*/
 948                 NALUUnit nalu(packet.getData()+pos,packet.getSize()-pos);
 949                 profile=nalu.getBits(8);
 950                 nalu.getBits(8); //constraints
 951                 nalu.getBits(8); //level_idc
 952                 nalu.getUe(); //seq_parameter_set_id
 953                 int chroma=1;
 954                 if (profile==100 || profile==110 || profile==122 || profile==144)
 955                 {
 956                     chroma=nalu.getUe();
 957                     if (chroma==3)
 958                     {
 959                         nalu.getBits(1);
 960                     }
 961                     nalu.getUe(); //bit depth lume
 962                     nalu.getUe(); //bit depth chrome
 963                     nalu.getBits(1);
 964                     if (nalu.getBits(1))
 965                     {
 966                         for (int i=0;i<8;i++){
 967                             if (nalu.getBits(1))
 968                             {
 969                                 if (i<6)
 970                                 {
 971                                     UINT lastscale=8;
 972                                     UINT nextscale=8;
 973                                     for (int j=0;j<16;j++) {
 974                                         if (nextscale!=0) {
 975                                             UINT delta=nalu.getSe();
 976                                             nextscale=(lastscale+delta+256)%256;
 977                                         }
 978                                         lastscale=(nextscale==0)?lastscale:nextscale;
 979                                     }
 980                                 }
 981                                 else
 982                                 {
 983                                     UINT lastscale=8;
 984                                     UINT nextscale=8;
 985                                     for (int j=0;j<64;j++) {
 986                                         if (nextscale!=0) {
 987                                             UINT delta=nalu.getSe();
 988                                             nextscale=(lastscale+delta+256)%256;
 989                                         }
 990                                         lastscale=(nextscale==0)?lastscale:nextscale;
 991                                     }
 992                                 }
 993                             }
 994                         }
 995                     }
 996                 }
 997                 int chromunitx=1;
 998                 int chromunity=1;
 999                 switch (chroma) {
1000                 case 0:
1001                     chromunitx=chromunity=1; break;
1002                 case 1:
1003                     chromunitx=chromunity=2; break;
1004                 case 2:
1005                     chromunitx=2;chromunity=1; break;
1006                 case 3:
1007                     chromunitx=chromunity=1; break;
1008                 };
1009
1010                 nalu.getUe(); //log2framenum
1011                 UINT temp=nalu.getUe();
1012                 if (temp==0) //pict order
1013                     nalu.getUe();
1014                 else if (temp==1) {
1015                     nalu.getBits(1);
1016                     nalu.getSe();
1017                     nalu.getSe();
1018                     UINT temp2=nalu.getUe();
1019                     for (UINT i=0;i<temp2;i++)
1020                         nalu.getSe();
1021                 }
1022                 nalu.getUe(); //Num refframes
1023                 nalu.getBits(1);
1024                 horizontal_size=(nalu.getUe()+1)*16;
1025
1026                 vertical_size=(nalu.getUe()+1)*16;
1027                 int tinterlaced=nalu.getBits(1);
1028                 vertical_size*=(2-tinterlaced);
1029                 interlaced=!tinterlaced;
1030
1031                 if (!tinterlaced) nalu.getBits(1);
1032                 nalu.getBits(1);
1033                 if (nalu.getBits(1))
1034                 {
1035                     horizontal_size-=nalu.getUe()*chromunitx;
1036                     horizontal_size-=nalu.getUe()*chromunitx;
1037                     vertical_size-=nalu.getUe()*(2-tinterlaced)*chromunity;
1038                     vertical_size-=nalu.getUe()*(2-tinterlaced)*chromunity;
1039                 }
1040                 if (nalu.getBits(1))
1041                 {
1042                     if (nalu.getBits(1))
1043                     {
1044                         UINT aspectratioidc=nalu.getBits(8);
1045                         bool hasaspect=false;
1046                         int aspectx,aspecty;
1047                         const float aspects[]={1., 1./1.,12./11.,10./11.,16./11.,40./33.,
1048                             24./11.,20./11.,32./11.,80./33.,18./11.,15./11.,64./33.,160./99.,4./3.,3./2.,2./1.};
1049                         const int aspectsx[]={1, 1,12,10,16,40,
1050                                                     24,20,32,80,18,15,64,160,4,3,2};
1051                         const int aspectsy[]={1, 1,11,11,11,33,11,11,11,33,11,11,33,99,3,2,1};
1052
1053                         float aspectratio=((float) horizontal_size)/((float) vertical_size);
1054                         if (aspectratioidc<=16)
1055                         {
1056                             hasaspect=true;
1057                             aspectratio*=aspects[aspectratioidc];
1058                             aspectx=aspectsx[aspectratioidc];
1059                             aspecty=aspectsy[aspectratioidc];
1060
1061                         }
1062                         else if (aspectratioidc==255)
1063                         {
1064                             int t_sar_width=nalu.getBits(16);
1065                             int t_sar_height=nalu.getBits(16);
1066                             if (t_sar_width!=0 && t_sar_height!=0)
1067                             {
1068                                 hasaspect=true;
1069                                 aspectratio*=((float)t_sar_width)/((float)t_sar_height);
1070                                 aspectx=t_sar_width;
1071                                 aspecty=t_sar_height;
1072                             }
1073                         }
1074                         if (hasaspect)
1075                         {
1076                             if (fabs(aspectratio-16./9.)<0.1) setAspectRatio(ASPECT_16_9,aspectx,aspecty);
1077                             else if (fabs(aspectratio-4./3.)<0.1) setAspectRatio(ASPECT_4_3,aspectx,aspecty);
1078                             else  setAspectRatio(ASPECT_1_1,aspectx,aspecty);
1079                         }
1080                     }
1081
1082                 }
1083
1084             }
1085             UINT posext = packet.findSeqExtHeader(h264);
1086             if (posext>1) {
1087                 if (!h264) {
1088                         interlaced=!(packet[pos+1] & 0x08); //really simple
1089                         // if more than full hd is coming we need to add additional parsers here
1090                 } else {
1091                 /*      NALUUnit nalu(packet.getData()+posext,packet.getSize()-posext);
1092                         while (!nalu.isEonalu()) {
1093                                 unsigned int payloadtype=0;
1094                                 unsigned int payloadadd=0xFF;
1095                                 while (payloadadd==0xFF && !nalu.isEonalu()) {
1096                                         payloadadd=nalu.getBits(8);
1097                                         payloadtype+=payloadadd;
1098                                 }
1099                                 unsigned int payloadsize=0;
1100                                 payloadadd=0xff;
1101                                 while (payloadadd==0xFF && !nalu.isEonalu()) {
1102                                        payloadadd=nalu.getBits(8);
1103                                        payloadsize+=payloadadd;
1104                             }
1105                                 switch (payloadtype) {
1106                                 case 1: { // picture timing SEI
1107
1108                                 } break;
1109                                 default: {
1110                                         while (payloadsize) { // not handled skip
1111                                                 nalu.getBits(8);
1112                                                 payloadsize--;
1113                                         }
1114                                 } break;
1115                                 }
1116
1117
1118
1119                         }*/
1120
1121
1122                 }
1123             }
1124
1125             if (vid_seeking)
1126             {
1127                 vid_seeking = 0;
1128                 video_pts_seek = video_pts;
1129                 Log::getInstance()->log("Demuxer", Log::DEBUG,
1130                     "Entering audio sync: Video PTS = %llu", video_pts);
1131                 Log::getInstance()->log("Demuxer", Log::DEBUG,
1132                     "Entering audio sync: Audio PTS = %llu", audio_pts);
1133             }
1134             return;
1135         }
1136     }
1137 }
1138
1139 UINT Demuxer::stripAudio(UCHAR* buf, UINT len)
1140 {
1141   UINT read_pos = 0, write_pos = 0;
1142   UINT pattern, packet_length;
1143   if (len < 4) return 0;
1144   pattern = (buf[0] << 16) | (buf[1] << 8) | (buf[2]);
1145   while (read_pos + 7 <= len)
1146   {
1147     pattern = ((pattern & 0xFFFFFF) << 8) | buf[read_pos+3];
1148     if (pattern < (0x100|PESTYPE_VID0) || pattern > (0x100|PESTYPE_VIDMAX))
1149       read_pos++;
1150     else
1151     {
1152       packet_length = ((buf[read_pos+4] << 8) | (buf[read_pos+5])) + 6;
1153       if (read_pos + packet_length > len)
1154         read_pos = len;
1155       else
1156       {
1157         if (read_pos != write_pos)
1158           memmove(buf+write_pos, buf+read_pos, packet_length);
1159         read_pos += packet_length;
1160         write_pos += packet_length;
1161         pattern = (buf[read_pos] << 16) | (buf[read_pos+1] << 8)
1162                                         | (buf[read_pos+2]);
1163       }
1164     }
1165   }
1166   return write_pos;
1167 }
1168
1169 void Demuxer::changeTimes(UCHAR* buf, UINT len,UINT playtime)
1170 {
1171         UINT pattern, packet_length;
1172         UINT read_pos = 0;
1173         if (len < 4) return;
1174         pattern = (buf[0] << 16) | (buf[1] << 8) | (buf[2]);
1175         while (read_pos + 7 <= len)
1176         {
1177            pattern = ((pattern & 0xFFFFFF) << 8) | buf[read_pos+3];
1178            if (pattern < (0x100|PESTYPE_VID0) || pattern > (0x100|PESTYPE_VIDMAX))
1179               read_pos++;
1180            else
1181            {
1182               packet_length = ((buf[read_pos+4] << 8) | (buf[read_pos+5])) + 6;
1183               // ok we have a packet figure out if pts and dts are present and replace them
1184               if (read_pos + 19 > len) return;
1185               ULLONG new_ts=playtime*90; //play time is on ms so multiply it by 90
1186               if (buf[read_pos+7] & 0x80) { // pts is here, replace it
1187                   buf[read_pos+9]=0x21 | (( new_ts>>29)& 0xde );
1188                   buf[read_pos+10]=0x00 |(( new_ts>>22)& 0xff );
1189                   buf[read_pos+11]=0x01 | (( new_ts>>14)& 0xfe );
1190                   buf[read_pos+12]=0x00 | (( new_ts>>7)& 0xff );
1191                   buf[read_pos+13]=0x01 | (( new_ts<<1)& 0xfe );
1192               }
1193
1194               if (buf[read_pos+7] & 0x40) { // pts is here, replace it
1195                    buf[read_pos+14]=0x21 | (( new_ts>>29)& 0xde );
1196                    buf[read_pos+15]=0x00 | (( new_ts>>22)& 0xff );
1197                    buf[read_pos+16]=0x01 | (( new_ts>>14)& 0xfe );
1198                    buf[read_pos+17]=0x00 | (( new_ts>>7)& 0xff );
1199                    buf[read_pos+18]=0x01 | (( new_ts<<1)& 0xfe );
1200               }
1201               read_pos += packet_length;
1202               pattern = (buf[read_pos] << 16) | (buf[read_pos+1] << 8)
1203                                                 | (buf[read_pos+2]);
1204               }
1205           }
1206
1207 }
1208
1209 bool Demuxer::scanForVideo(UCHAR* buf, UINT len, bool &ish264)
1210 {
1211   UINT pos = 3;
1212   UINT pattern;
1213   ish264=false;
1214   if (len < 4) return false;
1215   pattern = (buf[0] << 16) | (buf[1] << 8) | (buf[2]);
1216   while (pos < len)
1217   {
1218     pattern = ((pattern & 0xFFFFFF) << 8) | buf[pos++];
1219     if (pattern >= (0x100|PESTYPE_VID0) && pattern <= (0x100|PESTYPE_VIDMAX))
1220       return true;
1221   }
1222   return false;
1223 }
1224
1225 bool* Demuxer::getmpAudioChannels()
1226 {
1227   return avail_mpaudchan;
1228 }
1229
1230 bool* Demuxer::getac3AudioChannels()
1231 {
1232   return avail_ac3audchan;
1233 }
1234
1235 bool* Demuxer::getSubtitleChannels()
1236 {
1237   return avail_dvbsubtitlechan;
1238 }
1239
1240 int Demuxer::getselSubtitleChannel()
1241 {
1242   return subtitle_current;
1243 }
1244
1245 int Demuxer::getselAudioChannel()
1246 {
1247   return audio_current;
1248 }
1249
1250