src/lib/adapter/Pulse-Eight/USBCECAdapterMessageQueue.cpp

   1 /*
   2  * This file is part of the libCEC(R) library.
   3  *
   4  * libCEC(R) is Copyright (C) 2011-2012 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 "env.h"
  34 #include "USBCECAdapterMessageQueue.h"
  35
  36 #include "USBCECAdapterCommunication.h"
  37 #include "USBCECAdapterMessage.h"
  38 #include "lib/platform/sockets/socket.h"
  39 #include "lib/LibCEC.h"
  40 #include "lib/platform/util/StdString.h"
  41
  42 using namespace CEC;
  43 using namespace PLATFORM;
  44 using namespace std;
  45
  46 #define MESSAGE_QUEUE_SIGNAL_WAIT_TIME 1000
  47
  48 CCECAdapterMessageQueueEntry::CCECAdapterMessageQueueEntry(CCECAdapterMessageQueue *queue, CCECAdapterMessage *message) :
  49     m_queue(queue),
  50     m_message(message),
  51     m_iPacketsLeft(message->IsTranmission() ? message->Size() / 4 : 1),
  52     m_bSucceeded(false),
  53     m_bWaiting(true),
  54     m_queueTimeout(message->transmit_timeout) {}
  55
  56 CCECAdapterMessageQueueEntry::~CCECAdapterMessageQueueEntry(void) { }
  57
  58 void CCECAdapterMessageQueueEntry::Broadcast(void)
  59 {
  60   CLockObject lock(m_mutex);
  61   m_condition.Broadcast();
  62 }
  63
  64 bool CCECAdapterMessageQueueEntry::MessageReceived(const CCECAdapterMessage &message)
  65 {
  66   bool bHandled(false);
  67
  68   if (IsResponse(message))
  69   {
  70     switch (message.Message())
  71     {
  72     case MSGCODE_COMMAND_ACCEPTED:
  73       bHandled = MessageReceivedCommandAccepted(message);
  74       break;
  75     case MSGCODE_TRANSMIT_SUCCEEDED:
  76       bHandled = MessageReceivedTransmitSucceeded(message);
  77       break;
  78     default:
  79       bHandled = MessageReceivedResponse(message);
  80       break;
  81     }
  82   }
  83
  84   return bHandled;
  85 }
  86
  87 void CCECAdapterMessageQueueEntry::Signal(void)
  88 {
  89   CLockObject lock(m_mutex);
  90   m_bSucceeded = true;
  91   m_condition.Signal();
  92 }
  93
  94 bool CCECAdapterMessageQueueEntry::Wait(uint32_t iTimeout)
  95 {
  96   bool bReturn(false);
  97   /* wait until we receive a signal when the tranmission succeeded */
  98   {
  99     CLockObject lock(m_mutex);
 100     bReturn = m_bSucceeded ? true : m_condition.Wait(m_mutex, m_bSucceeded, iTimeout);
 101     m_bWaiting = false;
 102   }
 103   return bReturn;
 104 }
 105
 106 bool CCECAdapterMessageQueueEntry::IsWaiting(void)
 107 {
 108   CLockObject lock(m_mutex);
 109   return m_bWaiting;
 110 }
 111
 112 cec_adapter_messagecode CCECAdapterMessageQueueEntry::MessageCode(void)
 113 {
 114   return m_message->Message();
 115 }
 116
 117 bool CCECAdapterMessageQueueEntry::IsResponseOld(const CCECAdapterMessage &msg)
 118 {
 119   cec_adapter_messagecode msgCode = msg.Message();
 120
 121   return msgCode == MessageCode() ||
 122          msgCode == MSGCODE_COMMAND_ACCEPTED ||
 123          msgCode == MSGCODE_COMMAND_REJECTED ||
 124          (m_message->IsTranmission() && (msgCode == MSGCODE_TIMEOUT_ERROR ||
 125              msgCode == MSGCODE_HIGH_ERROR ||
 126              msgCode == MSGCODE_LOW_ERROR ||
 127              msgCode == MSGCODE_RECEIVE_FAILED ||
 128              msgCode == MSGCODE_TRANSMIT_FAILED_LINE ||
 129              msgCode == MSGCODE_TRANSMIT_FAILED_ACK ||
 130              msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
 131              msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE ||
 132              msgCode == MSGCODE_TRANSMIT_SUCCEEDED));
 133 }
 134
 135 bool CCECAdapterMessageQueueEntry::IsResponse(const CCECAdapterMessage &msg)
 136 {
 137   if (m_message->state == ADAPTER_MESSAGE_STATE_SENT_ACKED)
 138     return false;
 139
 140   cec_adapter_messagecode thisMsgCode = m_message->Message();
 141   cec_adapter_messagecode msgCode = msg.Message();
 142   cec_adapter_messagecode msgResponse = msg.ResponseTo();
 143
 144   // msgcode matches, always a response
 145   if (msgCode == MessageCode())
 146     return true;
 147
 148   if (!ProvidesExtendedResponse())
 149     return IsResponseOld(msg);
 150
 151   // response without a msgcode
 152   if (msgResponse == MSGCODE_NOTHING)
 153     return false;
 154
 155   // commands that only repond with accepted/rejected
 156   if (thisMsgCode == MSGCODE_PING ||
 157       thisMsgCode == MSGCODE_SET_ACK_MASK ||
 158       thisMsgCode == MSGCODE_SET_CONTROLLED ||
 159       thisMsgCode == MSGCODE_SET_AUTO_ENABLED ||
 160       thisMsgCode == MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS ||
 161       thisMsgCode == MSGCODE_SET_LOGICAL_ADDRESS_MASK ||
 162       thisMsgCode == MSGCODE_SET_PHYSICAL_ADDRESS ||
 163       thisMsgCode == MSGCODE_SET_DEVICE_TYPE ||
 164       thisMsgCode == MSGCODE_SET_HDMI_VERSION ||
 165       thisMsgCode == MSGCODE_SET_OSD_NAME ||
 166       thisMsgCode == MSGCODE_WRITE_EEPROM ||
 167       thisMsgCode == MSGCODE_TRANSMIT_IDLETIME)
 168     return thisMsgCode == msgResponse;
 169
 170   if (!m_message->IsTranmission())
 171   {
 172     m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_WARNING, "FIXME! not a transmission");
 173     return false;
 174   }
 175
 176   return ((msgCode == MSGCODE_COMMAND_ACCEPTED || msgCode == MSGCODE_COMMAND_REJECTED) &&
 177       (msgResponse == MSGCODE_TRANSMIT_ACK_POLARITY || msgResponse == MSGCODE_TRANSMIT || msgResponse == MSGCODE_TRANSMIT_EOM)) ||
 178       msgCode == MSGCODE_TIMEOUT_ERROR ||
 179       msgCode == MSGCODE_RECEIVE_FAILED ||
 180       msgCode == MSGCODE_TRANSMIT_FAILED_ACK ||
 181       msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
 182       msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE ||
 183       msgCode == MSGCODE_TRANSMIT_SUCCEEDED;
 184 }
 185
 186 const char *CCECAdapterMessageQueueEntry::ToString(void) const
 187 {
 188   /* CEC transmissions got the 'set ack polarity' msgcode, which doesn't look nice */
 189   if (m_message->IsTranmission())
 190     return "CEC transmission";
 191   else
 192     return CCECAdapterMessage::ToString(m_message->Message());
 193 }
 194
 195 bool CCECAdapterMessageQueueEntry::MessageReceivedCommandAccepted(const CCECAdapterMessage &message)
 196 {
 197   bool bSendSignal(false);
 198   bool bHandled(false);
 199   {
 200     CLockObject lock(m_mutex);
 201     if (m_iPacketsLeft > 0)
 202     {
 203       /* decrease by 1 */
 204       m_iPacketsLeft--;
 205
 206       /* log this message */
 207       CStdString strLog;
 208       strLog.Format("%s - command accepted", ToString());
 209       if (m_iPacketsLeft > 0)
 210         strLog.AppendFormat(" - waiting for %d more", m_iPacketsLeft);
 211       m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, strLog);
 212
 213       /* no more packets left and not a transmission, so we're done */
 214       if (!m_message->IsTranmission() && m_iPacketsLeft == 0)
 215       {
 216         m_message->state = ADAPTER_MESSAGE_STATE_SENT_ACKED;
 217         m_message->response = message.packet;
 218         bSendSignal = true;
 219       }
 220       bHandled = true;
 221     }
 222   }
 223
 224   if (bSendSignal)
 225     Signal();
 226
 227   return bHandled;
 228 }
 229
 230 bool CCECAdapterMessageQueueEntry::MessageReceivedTransmitSucceeded(const CCECAdapterMessage &message)
 231 {
 232   {
 233     CLockObject lock(m_mutex);
 234     if (m_iPacketsLeft == 0)
 235     {
 236       /* transmission succeeded, so we're done */
 237       m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, "%s - transmit succeeded", m_message->ToString().c_str());
 238       m_message->state = ADAPTER_MESSAGE_STATE_SENT_ACKED;
 239       m_message->response = message.packet;
 240     }
 241     else
 242     {
 243       /* error, we expected more acks
 244          since the messages are processed in order, this should not happen, so this is an error situation */
 245       m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_WARNING, "%s - received 'transmit succeeded' but not enough 'command accepted' messages (%d left)", ToString(), m_iPacketsLeft);
 246       m_message->state = ADAPTER_MESSAGE_STATE_ERROR;
 247     }
 248   }
 249
 250   Signal();
 251
 252   return true;
 253 }
 254
 255 bool CCECAdapterMessageQueueEntry::MessageReceivedResponse(const CCECAdapterMessage &message)
 256 {
 257   {
 258     CLockObject lock(m_mutex);
 259     m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, "%s - received response - %s", ToString(), message.ToString().c_str());
 260     m_message->response = message.packet;
 261     if (m_message->IsTranmission())
 262       m_message->state = message.Message() == MSGCODE_TRANSMIT_SUCCEEDED ? ADAPTER_MESSAGE_STATE_SENT_ACKED : ADAPTER_MESSAGE_STATE_SENT_NOT_ACKED;
 263     else
 264       m_message->state = ADAPTER_MESSAGE_STATE_SENT_ACKED;
 265   }
 266
 267   Signal();
 268
 269   return true;
 270 }
 271
 272 bool CCECAdapterMessageQueueEntry::ProvidesExtendedResponse(void)
 273 {
 274   return m_queue && m_queue->ProvidesExtendedResponse();
 275 }
 276
 277 bool CCECAdapterMessageQueueEntry::TimedOutOrSucceeded(void) const
 278 {
 279   return m_message->bFireAndForget && (m_bSucceeded || m_queueTimeout.TimeLeft() == 0);
 280 }
 281
 282 CCECAdapterMessageQueue::CCECAdapterMessageQueue(CUSBCECAdapterCommunication *com) :
 283   PLATFORM::CThread(),
 284   m_com(com),
 285   m_iNextMessage(0)
 286 {
 287   m_incomingAdapterMessage = new CCECAdapterMessage;
 288   m_currentCECFrame.Clear();
 289 }
 290
 291 CCECAdapterMessageQueue::~CCECAdapterMessageQueue(void)
 292 {
 293   Clear();
 294   StopThread(0);
 295   delete m_incomingAdapterMessage;
 296 }
 297
 298 void CCECAdapterMessageQueue::Clear(void)
 299 {
 300   StopThread(5);
 301   CLockObject lock(m_mutex);
 302   m_writeQueue.Clear();
 303   m_messages.clear();
 304 }
 305
 306 void *CCECAdapterMessageQueue::Process(void)
 307 {
 308   CCECAdapterMessageQueueEntry *message(NULL);
 309   while (!IsStopped())
 310   {
 311     /* wait for a new message */
 312     if (m_writeQueue.Pop(message, MESSAGE_QUEUE_SIGNAL_WAIT_TIME) && message)
 313     {
 314       /* write this message */
 315       {
 316         CLockObject lock(m_mutex);
 317         m_com->WriteToDevice(message->m_message);
 318       }
 319       if (message->m_message->state == ADAPTER_MESSAGE_STATE_ERROR ||
 320           message->m_message->Message() == MSGCODE_START_BOOTLOADER)
 321       {
 322         message->Signal();
 323         Clear();
 324         break;
 325       }
 326     }
 327
 328     CheckTimedOutMessages();
 329   }
 330   return NULL;
 331 }
 332
 333 void CCECAdapterMessageQueue::CheckTimedOutMessages(void)
 334 {
 335   CLockObject lock(m_mutex);
 336   vector<uint64_t> timedOut;
 337   for (map<uint64_t, CCECAdapterMessageQueueEntry *>::iterator it = m_messages.begin(); it != m_messages.end(); it++)
 338   {
 339     if (it->second->TimedOutOrSucceeded())
 340     {
 341       timedOut.push_back(it->first);
 342       if (!it->second->m_bSucceeded)
 343         m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, "command '%s' was not acked by the controller", CCECAdapterMessage::ToString(it->second->m_message->Message()));
 344       delete it->second->m_message;
 345       delete it->second;
 346     }
 347   }
 348
 349   for (vector<uint64_t>::iterator it = timedOut.begin(); it != timedOut.end(); it++)
 350   {
 351     uint64_t iEntryId = *it;
 352     m_messages.erase(iEntryId);
 353   }
 354 }
 355
 356 void CCECAdapterMessageQueue::MessageReceived(const CCECAdapterMessage &msg)
 357 {
 358   bool bHandled(false);
 359   CLockObject lock(m_mutex);
 360   /* send the received message to each entry in the queue until it is handled */
 361   for (map<uint64_t, CCECAdapterMessageQueueEntry *>::iterator it = m_messages.begin(); !bHandled && it != m_messages.end(); it++)
 362     bHandled = it->second->MessageReceived(msg);
 363
 364   if (!bHandled)
 365   {
 366     /* the message wasn't handled */
 367     bool bIsError(m_com->HandlePoll(msg));
 368     m_com->m_callback->GetLib()->AddLog(bIsError ? CEC_LOG_WARNING : CEC_LOG_DEBUG, msg.ToString().c_str());
 369
 370     /* push this message to the current frame */
 371     if (!bIsError && msg.PushToCecCommand(m_currentCECFrame))
 372     {
 373       /* and push the current frame back over the callback method when a full command was received */
 374       if (m_com->IsInitialised())
 375         m_com->m_callback->OnCommandReceived(m_currentCECFrame);
 376
 377       /* clear the current frame */
 378       m_currentCECFrame.Clear();
 379     }
 380   }
 381 }
 382
 383 void CCECAdapterMessageQueue::AddData(uint8_t *data, size_t iLen)
 384 {
 385   for (size_t iPtr = 0; iPtr < iLen; iPtr++)
 386   {
 387     bool bFullMessage(false);
 388     {
 389       CLockObject lock(m_mutex);
 390       bFullMessage = m_incomingAdapterMessage->PushReceivedByte(data[iPtr]);
 391     }
 392
 393     if (bFullMessage)
 394     {
 395       /* a full message was received */
 396       CCECAdapterMessage newMessage;
 397       newMessage.packet = m_incomingAdapterMessage->packet;
 398       MessageReceived(newMessage);
 399
 400       /* clear the current message */
 401       CLockObject lock(m_mutex);
 402       m_incomingAdapterMessage->Clear();
 403     }
 404   }
 405 }
 406
 407 bool CCECAdapterMessageQueue::Write(CCECAdapterMessage *msg)
 408 {
 409   msg->state = ADAPTER_MESSAGE_STATE_WAITING_TO_BE_SENT;
 410
 411   /* set the correct line timeout */
 412   if (msg->IsTranmission())
 413   {
 414     m_com->SetLineTimeout(msg->lineTimeout);
 415   }
 416
 417   CCECAdapterMessageQueueEntry *entry = new CCECAdapterMessageQueueEntry(this, msg);
 418   if (!entry)
 419   {
 420     m_com->m_callback->GetLib()->AddLog(CEC_LOG_ERROR, "couldn't create queue entry for '%s'", CCECAdapterMessage::ToString(msg->Message()));
 421     msg->state = ADAPTER_MESSAGE_STATE_ERROR;
 422     return false;
 423   }
 424
 425   uint64_t iEntryId(0);
 426   /* add to the wait for ack queue */
 427   if (msg->Message() != MSGCODE_START_BOOTLOADER)
 428   {
 429     CLockObject lock(m_mutex);
 430     iEntryId = m_iNextMessage++;
 431     m_messages.insert(make_pair(iEntryId, entry));
 432   }
 433
 434   /* add the message to the write queue */
 435   m_writeQueue.Push(entry);
 436
 437   bool bReturn(true);
 438   if (!msg->bFireAndForget)
 439   {
 440     if (!entry->Wait(msg->transmit_timeout <= 5 ? CEC_DEFAULT_TRANSMIT_WAIT : msg->transmit_timeout))
 441     {
 442       m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, "command '%s' was not acked by the controller", CCECAdapterMessage::ToString(msg->Message()));
 443       msg->state = ADAPTER_MESSAGE_STATE_SENT_NOT_ACKED;
 444       bReturn = false;
 445     }
 446
 447     if (msg->Message() != MSGCODE_START_BOOTLOADER)
 448     {
 449       CLockObject lock(m_mutex);
 450       m_messages.erase(iEntryId);
 451     }
 452
 453     if (msg->ReplyIsError())
 454       msg->state = ADAPTER_MESSAGE_STATE_ERROR;
 455
 456     delete entry;
 457   }
 458
 459   return bReturn;
 460 }
 461
 462 bool CCECAdapterMessageQueue::ProvidesExtendedResponse(void)
 463 {
 464   return m_com && m_com->ProvidesExtendedResponse();
 465 }