src/lib/CECParser.cpp

   1 /*
   2  * This file is part of the libCEC(R) library.
   3  *
   4  * libCEC(R) is Copyright (C) 2011 Pulse-Eight Limited.  All rights reserved.
   5  * libCEC(R) is an original work, containing original code.
   6  *
   7  * libCEC(R) is a trademark of Pulse-Eight Limited.
   8  *
   9  * This program is dual-licensed; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  *
  24  * Alternatively, you can license this library under a commercial license,
  25  * please contact Pulse-Eight Licensing for more information.
  26  *
  27  * For more information contact:
  28  * Pulse-Eight Licensing       <license@pulse-eight.com>
  29  *     http://www.pulse-eight.com/
  30  *     http://www.pulse-eight.net/
  31  */
  32
  33 #include "CECParser.h"
  34
  35 #include <algorithm>
  36 #include <cstdio>
  37 #include <cstdlib>
  38 #include <cstring>
  39 #include <sys/stat.h>
  40 #include "util/StdString.h"
  41 #include "libPlatform/serialport.h"
  42 #include "util/threads.h"
  43 #include "util/timeutils.h"
  44 #include "CECDetect.h"
  45 #include "AdapterCommunication.h"
  46
  47 using namespace CEC;
  48 using namespace std;
  49
  50 #define CEC_MAX_RETRY 5
  51 #define CEC_BUTTON_TIMEOUT 500
  52
  53 /*!
  54  * ICECDevice implementation
  55  */
  56 //@{
  57 CCECParser::CCECParser(const char *strDeviceName, cec_logical_address iLogicalAddress /* = CECDEVICE_PLAYBACKDEVICE1 */, int iPhysicalAddress /* = CEC_DEFAULT_PHYSICAL_ADDRESS*/) :
  58     m_iCurrentButton(CEC_USER_CONTROL_CODE_UNKNOWN),
  59     m_physicaladdress(iPhysicalAddress),
  60     m_iLogicalAddress(iLogicalAddress),
  61     m_strDeviceName(strDeviceName)
  62 {
  63   m_communication = new CAdapterCommunication(this);
  64 }
  65
  66 CCECParser::~CCECParser(void)
  67 {
  68   Close();
  69   m_communication->Close();
  70   delete m_communication;
  71 }
  72
  73 bool CCECParser::Open(const char *strPort, int iTimeoutMs /* = 10000 */)
  74 {
  75   if (!m_communication)
  76     return false;
  77
  78   if (m_communication->IsOpen())
  79   {
  80     AddLog(CEC_LOG_ERROR, "connection already open");
  81     return false;
  82   }
  83
  84   if (!m_communication->Open(strPort, 38400, iTimeoutMs))
  85   {
  86     AddLog(CEC_LOG_ERROR, "could not open a connection");
  87     return false;
  88   }
  89
  90   if (!SetLogicalAddress(m_iLogicalAddress))
  91   {
  92     AddLog(CEC_LOG_ERROR, "could not set the logical address");
  93     return false;
  94   }
  95
  96   if (CreateThread())
  97     return true;
  98   else
  99     AddLog(CEC_LOG_ERROR, "could not create a processor thread");
 100
 101   return false;
 102 }
 103
 104 void CCECParser::Close(void)
 105 {
 106   StopThread();
 107 }
 108
 109 void *CCECParser::Process(void)
 110 {
 111   AddLog(CEC_LOG_DEBUG, "processor thread started");
 112
 113   int64_t now = GetTimeMs();
 114   while (!m_bStop)
 115   {
 116     bool bParseFrame(false);
 117     {
 118       CLockObject lock(&m_mutex);
 119       cec_frame msg;
 120       if (!m_bStop && m_communication->IsOpen() && m_communication->Read(msg, CEC_BUTTON_TIMEOUT))
 121         bParseFrame = ParseMessage(msg);
 122     }
 123
 124     if (bParseFrame)
 125       ParseCurrentFrame();
 126
 127     now = GetTimeMs();
 128     CheckKeypressTimeout(now);
 129     CCondition::Sleep(50);
 130   }
 131
 132   AddLog(CEC_LOG_DEBUG, "processor thread terminated");
 133   return NULL;
 134 }
 135
 136 bool CCECParser::Ping(void)
 137 {
 138   if (!IsRunning())
 139     return false;
 140
 141   AddLog(CEC_LOG_DEBUG, "sending ping");
 142   cec_frame output;
 143   output.push_back(MSGSTART);
 144   PushEscaped(output, MSGCODE_PING);
 145   output.push_back(MSGEND);
 146
 147   if (!TransmitFormatted(output, false))
 148   {
 149     AddLog(CEC_LOG_ERROR, "could not send ping command");
 150     return false;
 151   }
 152
 153   AddLog(CEC_LOG_DEBUG, "ping tranmitted");
 154
 155   // TODO check for pong
 156   return true;
 157 }
 158
 159 bool CCECParser::StartBootloader(void)
 160 {
 161   if (!IsRunning())
 162     return false;
 163
 164   AddLog(CEC_LOG_DEBUG, "starting the bootloader");
 165   cec_frame output;
 166   output.push_back(MSGSTART);
 167   PushEscaped(output, MSGCODE_START_BOOTLOADER);
 168   output.push_back(MSGEND);
 169
 170   if (!TransmitFormatted(output, false))
 171   {
 172     AddLog(CEC_LOG_ERROR, "could not start the bootloader");
 173     return false;
 174   }
 175
 176   AddLog(CEC_LOG_DEBUG, "bootloader start command transmitted");
 177   return true;
 178 }
 179
 180 uint8_t CCECParser::GetSourceDestination(cec_logical_address destination /* = CECDEVICE_BROADCAST */)
 181 {
 182   return ((uint8_t)m_iLogicalAddress << 4) + (uint8_t)destination;
 183 }
 184
 185 bool CCECParser::PowerOffDevices(cec_logical_address address /* = CECDEVICE_BROADCAST */)
 186 {
 187   return StandbyDevices(address);
 188 }
 189
 190 bool CCECParser::PowerOnDevices(cec_logical_address address /* = CECDEVICE_TV */)
 191 {
 192   if (!IsRunning())
 193     return false;
 194
 195   CStdString strLog;
 196   strLog.Format("powering on devices with logical address %d", (int8_t)address);
 197   AddLog(CEC_LOG_DEBUG, strLog.c_str());
 198   cec_frame frame;
 199   frame.push_back(GetSourceDestination(address));
 200   frame.push_back(CEC_OPCODE_TEXT_VIEW_ON);
 201   return Transmit(frame);
 202 }
 203
 204 bool CCECParser::StandbyDevices(cec_logical_address address /* = CECDEVICE_BROADCAST */)
 205 {
 206   if (!IsRunning())
 207     return false;
 208
 209   CStdString strLog;
 210   strLog.Format("putting all devices with logical address %d in standby mode", (int8_t)address);
 211   AddLog(CEC_LOG_DEBUG, strLog.c_str());
 212   cec_frame frame;
 213   frame.push_back(GetSourceDestination(address));
 214   frame.push_back(CEC_OPCODE_STANDBY);
 215   return Transmit(frame);
 216 }
 217
 218 bool CCECParser::SetActiveView(void)
 219 {
 220   if (!IsRunning())
 221     return false;
 222
 223   AddLog(CEC_LOG_DEBUG, "setting active view");
 224   cec_frame frame;
 225   frame.push_back(GetSourceDestination(CECDEVICE_BROADCAST));
 226   frame.push_back(CEC_OPCODE_ACTIVE_SOURCE);
 227   frame.push_back((m_physicaladdress >> 8) & 0xFF);
 228   frame.push_back(m_physicaladdress & 0xFF);
 229   return Transmit(frame);
 230 }
 231
 232 bool CCECParser::SetInactiveView(void)
 233 {
 234   if (!IsRunning())
 235     return false;
 236
 237   AddLog(CEC_LOG_DEBUG, "setting inactive view");
 238   cec_frame frame;
 239   frame.push_back(GetSourceDestination(CECDEVICE_BROADCAST));
 240   frame.push_back(CEC_OPCODE_INACTIVE_SOURCE);
 241   frame.push_back((m_physicaladdress >> 8) & 0xFF);
 242   frame.push_back(m_physicaladdress & 0xFF);
 243   return Transmit(frame);
 244 }
 245
 246 bool CCECParser::GetNextLogMessage(cec_log_message *message)
 247 {
 248   return m_logBuffer.Pop(*message);
 249 }
 250
 251 bool CCECParser::GetNextKeypress(cec_keypress *key)
 252 {
 253   return IsRunning() ? m_keyBuffer.Pop(*key) : false;
 254 }
 255
 256 bool CCECParser::GetNextCommand(cec_command *command)
 257 {
 258   return IsRunning() ? m_commandBuffer.Pop(*command) : false;
 259 }
 260 //@}
 261
 262 void CCECParser::TransmitAbort(cec_logical_address address, cec_opcode opcode, ECecAbortReason reason /* = CEC_ABORT_REASON_UNRECOGNIZED_OPCODE */)
 263 {
 264   AddLog(CEC_LOG_DEBUG, "transmitting abort message");
 265   cec_frame frame;
 266   frame.push_back(GetSourceDestination(address));
 267   frame.push_back(CEC_OPCODE_FEATURE_ABORT);
 268   frame.push_back(opcode);
 269   frame.push_back(reason);
 270   Transmit(frame);
 271 }
 272
 273 void CCECParser::ReportCECVersion(cec_logical_address address /* = CECDEVICE_TV */)
 274 {
 275   cec_frame frame;
 276   AddLog(CEC_LOG_NOTICE, "reporting CEC version as 1.3a");
 277   frame.push_back(GetSourceDestination(address));
 278   frame.push_back(CEC_OPCODE_CEC_VERSION);
 279   frame.push_back(CEC_VERSION_1_3A);
 280   Transmit(frame);
 281 }
 282
 283 void CCECParser::ReportPowerState(cec_logical_address address /*= CECDEVICE_TV */, bool bOn /* = true */)
 284 {
 285   cec_frame frame;
 286   if (bOn)
 287     AddLog(CEC_LOG_NOTICE, "reporting \"On\" power status");
 288   else
 289     AddLog(CEC_LOG_NOTICE, "reporting \"Off\" power status");
 290
 291   frame.push_back(GetSourceDestination(address));
 292   frame.push_back(CEC_OPCODE_REPORT_POWER_STATUS);
 293   frame.push_back(bOn ? CEC_POWER_STATUS_ON : CEC_POWER_STATUS_STANDBY);
 294   Transmit(frame);
 295 }
 296
 297 void CCECParser::ReportMenuState(cec_logical_address address /* = CECDEVICE_TV */, bool bActive /* = true */)
 298 {
 299   cec_frame frame;
 300   if (bActive)
 301     AddLog(CEC_LOG_NOTICE, "reporting menu state as active");
 302   else
 303     AddLog(CEC_LOG_NOTICE, "reporting menu state as inactive");
 304
 305   frame.push_back(GetSourceDestination(address));
 306   frame.push_back(CEC_OPCODE_MENU_STATUS);
 307   frame.push_back(bActive ? CEC_MENU_STATE_ACTIVATED : CEC_MENU_STATE_DEACTIVATED);
 308   Transmit(frame);
 309 }
 310
 311 void CCECParser::ReportVendorID(cec_logical_address address /* = CECDEVICE_TV */)
 312 {
 313   AddLog(CEC_LOG_NOTICE, "vendor ID requested, feature abort");
 314   TransmitAbort(address, CEC_OPCODE_GIVE_DEVICE_VENDOR_ID);
 315 }
 316
 317 void CCECParser::ReportOSDName(cec_logical_address address /* = CECDEVICE_TV */)
 318 {
 319   cec_frame frame;
 320   const char *osdname = m_strDeviceName.c_str();
 321   CStdString strLog;
 322   strLog.Format("reporting OSD name as %s", osdname);
 323   AddLog(CEC_LOG_NOTICE, strLog.c_str());
 324   frame.push_back(GetSourceDestination(address));
 325   frame.push_back(CEC_OPCODE_SET_OSD_NAME);
 326
 327   for (unsigned int i = 0; i < strlen(osdname); i++)
 328     frame.push_back(osdname[i]);
 329
 330   Transmit(frame);
 331 }
 332
 333 void CCECParser::ReportPhysicalAddress(void)
 334 {
 335   cec_frame frame;
 336   CStdString strLog;
 337   strLog.Format("reporting physical address as %04x", m_physicaladdress);
 338   AddLog(CEC_LOG_NOTICE, strLog.c_str());
 339   frame.push_back(GetSourceDestination(CECDEVICE_BROADCAST));
 340   frame.push_back(CEC_OPCODE_REPORT_PHYSICAL_ADDRESS);
 341   frame.push_back((m_physicaladdress >> 8) & 0xFF);
 342   frame.push_back(m_physicaladdress & 0xFF);
 343   frame.push_back(CEC_DEVICE_TYPE_PLAYBACK_DEVICE);
 344   Transmit(frame);
 345 }
 346
 347 void CCECParser::BroadcastActiveSource(void)
 348 {
 349   cec_frame frame;
 350   AddLog(CEC_LOG_NOTICE, "broadcasting active source");
 351   frame.push_back(GetSourceDestination(CECDEVICE_BROADCAST));
 352   frame.push_back(CEC_OPCODE_ACTIVE_SOURCE);
 353   frame.push_back((m_physicaladdress >> 8) & 0xFF);
 354   frame.push_back(m_physicaladdress & 0xFF);
 355   Transmit(frame);
 356 }
 357
 358 bool CCECParser::TransmitFormatted(const cec_frame &data, bool bWaitForAck /* = true */)
 359 {
 360   CLockObject lock(&m_mutex);
 361   if (!m_communication || !m_communication->Write(data))
 362   {
 363     return false;
 364   }
 365
 366   CCondition::Sleep((int) data.size() * 24 /*data*/ + 5 /*start bit (4.5 ms)*/ + 50 /* to be on the safe side */);
 367   if (bWaitForAck && !WaitForAck())
 368   {
 369     AddLog(CEC_LOG_DEBUG, "did not receive ACK");
 370     return false;
 371   }
 372
 373   return true;
 374 }
 375
 376 bool CCECParser::Transmit(const cec_frame &data, bool bWaitForAck /* = true */)
 377 {
 378   CStdString txStr = "transmit ";
 379   for (unsigned int i = 0; i < data.size(); i++)
 380     txStr.AppendFormat(" %02x", data[i]);
 381   AddLog(CEC_LOG_DEBUG, txStr.c_str());
 382
 383   if (data.empty())
 384   {
 385     AddLog(CEC_LOG_WARNING, "transmit buffer is empty");
 386     return false;
 387   }
 388
 389   cec_frame output;
 390
 391   //set ack polarity to high when transmitting to the broadcast address
 392   //set ack polarity low when transmitting to any other address
 393   output.push_back(MSGSTART);
 394   PushEscaped(output, MSGCODE_TRANSMIT_ACK_POLARITY);
 395
 396   if ((data[0] & 0xF) == 0xF)
 397     PushEscaped(output, CEC_TRUE);
 398   else
 399     PushEscaped(output, CEC_FALSE);
 400
 401   output.push_back(MSGEND);
 402
 403   for (unsigned int i = 0; i < data.size(); i++)
 404   {
 405     output.push_back(MSGSTART);
 406
 407     if (i == data.size() - 1)
 408       PushEscaped(output, MSGCODE_TRANSMIT_EOM);
 409     else
 410       PushEscaped(output, MSGCODE_TRANSMIT);
 411
 412     PushEscaped(output, data[i]);
 413
 414     output.push_back(MSGEND);
 415   }
 416
 417   return TransmitFormatted(output, bWaitForAck);
 418 }
 419
 420 bool CCECParser::WaitForAck(int iTimeout /* = 1000 */)
 421 {
 422   bool bGotAck(false);
 423   bool bError(false);
 424
 425   int64_t iNow = GetTimeMs();
 426   int64_t iTargetTime = iNow + (int64_t) iTimeout;
 427
 428   while (!bGotAck && !bError && (iTimeout <= 0 || iNow < iTargetTime))
 429   {
 430     cec_frame msg;
 431     while (!bGotAck && !bError && m_communication->Read(msg, iTimeout))
 432     {
 433       uint8_t iCode = msg[0] & ~(MSGCODE_FRAME_EOM | MSGCODE_FRAME_ACK);
 434
 435       switch (iCode)
 436       {
 437       case MSGCODE_COMMAND_ACCEPTED:
 438         AddLog(CEC_LOG_DEBUG, "MSGCODE_COMMAND_ACCEPTED");
 439         break;
 440       case MSGCODE_TRANSMIT_SUCCEEDED:
 441         AddLog(CEC_LOG_DEBUG, "MSGCODE_TRANSMIT_SUCCEEDED");
 442         // TODO
 443         bGotAck = true;
 444         break;
 445       case MSGCODE_RECEIVE_FAILED:
 446         AddLog(CEC_LOG_WARNING, "MSGCODE_RECEIVE_FAILED");
 447         bError = true;
 448         break;
 449       case MSGCODE_COMMAND_REJECTED:
 450         AddLog(CEC_LOG_WARNING, "MSGCODE_COMMAND_REJECTED");
 451         bError = true;
 452         break;
 453       case MSGCODE_TRANSMIT_FAILED_LINE:
 454         AddLog(CEC_LOG_WARNING, "MSGCODE_TRANSMIT_FAILED_LINE");
 455         bError = true;
 456         break;
 457       case MSGCODE_TRANSMIT_FAILED_ACK:
 458         AddLog(CEC_LOG_WARNING, "MSGCODE_TRANSMIT_FAILED_ACK");
 459         bError = true;
 460         break;
 461       case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
 462         AddLog(CEC_LOG_WARNING, "MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA");
 463         bError = true;
 464         break;
 465       case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
 466         AddLog(CEC_LOG_WARNING, "MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE");
 467         bError = true;
 468         break;
 469       default:
 470         m_frameBuffer.Push(msg);
 471         bGotAck = (msg[0] & MSGCODE_FRAME_ACK) != 0;
 472         break;
 473       }
 474       iNow = GetTimeMs();
 475     }
 476   }
 477
 478   return bGotAck && !bError;
 479 }
 480
 481 bool CCECParser::ParseMessage(cec_frame &msg)
 482 {
 483   bool bReturn(false);
 484
 485   if (msg.empty())
 486     return bReturn;
 487
 488   CStdString logStr;
 489   uint8_t iCode = msg[0] & ~(MSGCODE_FRAME_EOM | MSGCODE_FRAME_ACK);
 490   bool    bEom  = (msg[0] & MSGCODE_FRAME_EOM) != 0;
 491   bool    bAck  = (msg[0] & MSGCODE_FRAME_ACK) != 0;
 492
 493   switch(iCode)
 494   {
 495   case MSGCODE_NOTHING:
 496     AddLog(CEC_LOG_DEBUG, "MSGCODE_NOTHING");
 497     break;
 498   case MSGCODE_TIMEOUT_ERROR:
 499   case MSGCODE_HIGH_ERROR:
 500   case MSGCODE_LOW_ERROR:
 501     {
 502       if (iCode == MSGCODE_TIMEOUT_ERROR)
 503         logStr = "MSGCODE_TIMEOUT";
 504       else if (iCode == MSGCODE_HIGH_ERROR)
 505         logStr = "MSGCODE_HIGH_ERROR";
 506       else
 507         logStr = "MSGCODE_LOW_ERROR";
 508
 509       int iLine      = (msg.size() >= 3) ? (msg[1] << 8) | (msg[2]) : 0;
 510       uint32_t iTime = (msg.size() >= 7) ? (msg[3] << 24) | (msg[4] << 16) | (msg[5] << 8) | (msg[6]) : 0;
 511       logStr.AppendFormat(" line:%i", iLine);
 512       logStr.AppendFormat(" time:%u", iTime);
 513       AddLog(CEC_LOG_WARNING, logStr.c_str());
 514     }
 515     break;
 516   case MSGCODE_FRAME_START:
 517     {
 518       logStr = "MSGCODE_FRAME_START";
 519       m_currentframe.clear();
 520       if (msg.size() >= 2)
 521       {
 522         int iInitiator = msg[1] >> 4;
 523         int iDestination = msg[1] & 0xF;
 524         logStr.AppendFormat(" initiator:%u destination:%u ack:%s %s", iInitiator, iDestination, bAck ? "high" : "low", bEom ? "eom" : "");
 525
 526         m_currentframe.push_back(msg[1]);
 527       }
 528       AddLog(CEC_LOG_DEBUG, logStr.c_str());
 529     }
 530     break;
 531   case MSGCODE_FRAME_DATA:
 532     {
 533       logStr = "MSGCODE_FRAME_DATA";
 534       if (msg.size() >= 2)
 535       {
 536         uint8_t iData = msg[1];
 537         logStr.AppendFormat(" %02x", iData);
 538         m_currentframe.push_back(iData);
 539       }
 540       AddLog(CEC_LOG_DEBUG, logStr.c_str());
 541     }
 542     if (bEom)
 543       bReturn = true;
 544     break;
 545   default:
 546     break;
 547   }
 548
 549   return bReturn;
 550 }
 551
 552 void CCECParser::ParseCurrentFrame(void)
 553 {
 554   uint8_t initiator = m_currentframe[0] >> 4;
 555   uint8_t destination = m_currentframe[0] & 0xF;
 556
 557   CStdString dataStr;
 558   dataStr.Format("received frame: initiator: %u destination: %u", initiator, destination);
 559
 560   if (m_currentframe.size() > 1)
 561   {
 562     dataStr += " data:";
 563     for (unsigned int i = 1; i < m_currentframe.size(); i++)
 564       dataStr.AppendFormat(" %02x", m_currentframe[i]);
 565   }
 566   AddLog(CEC_LOG_DEBUG, dataStr.c_str());
 567
 568   if (m_currentframe.size() <= 1)
 569     return;
 570
 571   vector<uint8_t> tx;
 572   cec_opcode opCode = (cec_opcode) m_currentframe[1];
 573   if (destination == (uint16_t) m_iLogicalAddress)
 574   {
 575     switch(opCode)
 576     {
 577     case CEC_OPCODE_GIVE_PHYSICAL_ADDRESS:
 578       ReportPhysicalAddress();
 579       SetActiveView();
 580       break;
 581     case CEC_OPCODE_GIVE_OSD_NAME:
 582       ReportOSDName((cec_logical_address)initiator);
 583       break;
 584     case CEC_OPCODE_GIVE_DEVICE_VENDOR_ID:
 585       ReportVendorID((cec_logical_address)initiator);
 586       break;
 587     case CEC_OPCODE_MENU_REQUEST:
 588       ReportMenuState((cec_logical_address)initiator);
 589       break;
 590     case CEC_OPCODE_GIVE_DEVICE_POWER_STATUS:
 591       ReportPowerState((cec_logical_address)initiator);
 592       break;
 593     case CEC_OPCODE_GET_CEC_VERSION:
 594       ReportCECVersion((cec_logical_address)initiator);
 595       break;
 596     case CEC_OPCODE_USER_CONTROL_PRESSED:
 597       if (m_currentframe.size() > 2)
 598       {
 599         AddKey();
 600
 601         if (m_currentframe[2] <= CEC_USER_CONTROL_CODE_MAX)
 602         {
 603           m_iCurrentButton = (cec_user_control_code) m_currentframe[2];
 604           m_buttontime = GetTimeMs();
 605         }
 606       }
 607       break;
 608     case CEC_OPCODE_USER_CONTROL_RELEASE:
 609       AddKey();
 610       break;
 611     default:
 612       cec_frame params = m_currentframe;
 613       params.erase(params.begin(), params.begin() + 2);
 614       AddCommand((cec_logical_address) initiator, (cec_logical_address) destination, opCode, &params);
 615       break;
 616     }
 617   }
 618   else if (destination == (uint8_t) CECDEVICE_BROADCAST)
 619   {
 620     if (opCode == CEC_OPCODE_REQUEST_ACTIVE_SOURCE)
 621     {
 622       BroadcastActiveSource();
 623     }
 624     else if (opCode == CEC_OPCODE_SET_STREAM_PATH)
 625     {
 626       if (m_currentframe.size() >= 4)
 627       {
 628         int streamaddr = ((int)m_currentframe[2] << 8) | ((int)m_currentframe[3]);
 629         CStdString strLog;
 630         strLog.Format("%i requests stream path from physical address %04x", initiator, streamaddr);
 631         AddLog(CEC_LOG_DEBUG, strLog.c_str());
 632         if (streamaddr == m_physicaladdress)
 633           BroadcastActiveSource();
 634       }
 635     }
 636     else
 637     {
 638       cec_frame params = m_currentframe;
 639       params.erase(params.begin(), params.begin() + 2);
 640       AddCommand((cec_logical_address) initiator, (cec_logical_address) destination, opCode, &params);
 641     }
 642   }
 643   else
 644   {
 645     CStdString strLog;
 646     strLog.Format("ignoring frame: destination: %u != %u", destination, (uint16_t)m_iLogicalAddress);
 647     AddLog(CEC_LOG_DEBUG, strLog.c_str());
 648   }
 649 }
 650
 651 void CCECParser::PushEscaped(cec_frame &vec, uint8_t byte)
 652 {
 653   if (byte >= MSGESC && byte != MSGSTART)
 654   {
 655     vec.push_back(MSGESC);
 656     vec.push_back(byte - ESCOFFSET);
 657   }
 658   else
 659   {
 660     vec.push_back(byte);
 661   }
 662 }
 663
 664 void CCECParser::CheckKeypressTimeout(int64_t now)
 665 {
 666   if (m_iCurrentButton != CEC_USER_CONTROL_CODE_UNKNOWN && now - m_buttontime > CEC_BUTTON_TIMEOUT)
 667   {
 668     AddKey();
 669     m_iCurrentButton = CEC_USER_CONTROL_CODE_UNKNOWN;
 670   }
 671 }
 672
 673 bool CCECParser::SetLogicalAddress(cec_logical_address iLogicalAddress)
 674 {
 675   CStdString strLog;
 676   strLog.Format("setting logical address to %d", iLogicalAddress);
 677   AddLog(CEC_LOG_NOTICE, strLog.c_str());
 678
 679   m_iLogicalAddress = iLogicalAddress;
 680   return SetAckMask(0x1 << (uint8_t)m_iLogicalAddress);
 681 }
 682
 683 bool CCECParser::SetAckMask(uint16_t iMask)
 684 {
 685   CStdString strLog;
 686   strLog.Format("setting ackmask to %2x", iMask);
 687   AddLog(CEC_LOG_DEBUG, strLog.c_str());
 688
 689   cec_frame output;
 690
 691   output.push_back(MSGSTART);
 692   PushEscaped(output, MSGCODE_SET_ACK_MASK);
 693   PushEscaped(output, iMask >> 8);
 694   PushEscaped(output, (uint8_t)iMask);
 695   output.push_back(MSGEND);
 696
 697   if (!m_communication->Write(output))
 698   {
 699     AddLog(CEC_LOG_ERROR, "could not set the ackmask");
 700     return false;
 701   }
 702
 703   return true;
 704 }
 705
 706 void CCECParser::AddLog(cec_log_level level, const string &strMessage)
 707 {
 708   cec_log_message message;
 709   message.level = level;
 710   message.message.assign(strMessage.c_str());
 711   m_logBuffer.Push(message);
 712 }
 713
 714 void CCECParser::AddKey(void)
 715 {
 716   if (m_iCurrentButton != CEC_USER_CONTROL_CODE_UNKNOWN)
 717   {
 718     cec_keypress key;
 719     key.duration = (unsigned int) (GetTimeMs() - m_buttontime);
 720     key.keycode = m_iCurrentButton;
 721     m_keyBuffer.Push(key);
 722     m_iCurrentButton = CEC_USER_CONTROL_CODE_UNKNOWN;
 723     m_buttontime = 0;
 724   }
 725 }
 726
 727 void CCECParser::AddCommand(cec_logical_address source, cec_logical_address destination, cec_opcode opcode, cec_frame *parameters)
 728 {
 729   cec_command command;
 730   command.source       = source;
 731   command.destination  = destination;
 732   command.opcode       = opcode;
 733   if (parameters)
 734     command.parameters = *parameters;
 735   if (m_commandBuffer.Push(command))
 736   {
 737     CStdString strDebug;
 738     strDebug.Format("stored command '%d' in the command buffer. buffer size = %d", opcode, m_commandBuffer.Size());
 739     AddLog(CEC_LOG_DEBUG, strDebug);
 740   }
 741   else
 742   {
 743     AddLog(CEC_LOG_WARNING, "command buffer is full");
 744   }
 745 }
 746
 747 int CCECParser::GetMinVersion(void)
 748 {
 749   return CEC_MIN_VERSION;
 750 }
 751
 752 int CCECParser::GetLibVersion(void)
 753 {
 754   return CEC_LIB_VERSION;
 755 }
 756
 757 int CCECParser::FindDevices(std::vector<cec_device> &deviceList, const char *strDevicePath /* = NULL */)
 758 {
 759   CStdString strDebug;
 760   if (strDevicePath)
 761     strDebug.Format("trying to autodetect the com port for device path '%s'", strDevicePath);
 762   else
 763     strDebug.Format("trying to autodetect all CEC adapters");
 764   AddLog(CEC_LOG_DEBUG, strDebug);
 765
 766   return CCECDetect::FindDevices(deviceList, strDevicePath);
 767 }
 768
 769 DECLSPEC void * CECCreate(const char *strDeviceName, CEC::cec_logical_address iLogicalAddress /*= CEC::CECDEVICE_PLAYBACKDEVICE1 */, int iPhysicalAddress /* = CEC_DEFAULT_PHYSICAL_ADDRESS */)
 770 {
 771   return static_cast< void* > (new CCECParser(strDeviceName, iLogicalAddress, iPhysicalAddress));
 772 }