From f7539eaf1ed0a488c0a93998c9b178d435014c51 Mon Sep 17 00:00:00 2001
From: Lars Op den Kamp <lars@opdenkamp.eu>
Date: Mon, 9 Dec 2013 19:00:34 +0100
Subject: [PATCH] added protection against standby without a notification from
 XBMC and clock changes. issue #186

---
 src/lib/CECProcessor.cpp                      | 36 ++++++++++++++++++-
 src/lib/CECProcessor.h                        | 13 +++++++
 .../USBCECAdapterCommunication.cpp            | 10 ++++--
 3 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/src/lib/CECProcessor.cpp b/src/lib/CECProcessor.cpp
index b1761a3..63e4815 100644
--- a/src/lib/CECProcessor.cpp
+++ b/src/lib/CECProcessor.cpp
@@ -57,6 +57,34 @@ using namespace PLATFORM;
 
 #define ToString(x) CCECTypeUtils::ToString(x)
 
+CCECStandbyProtection::CCECStandbyProtection(CCECProcessor* processor) :
+    m_processor(processor) {}
+CCECStandbyProtection::~CCECStandbyProtection(void) {}
+
+void* CCECStandbyProtection::Process(void)
+{
+  int64_t last = GetTimeMs();
+  int64_t next;
+  while (!IsStopped())
+  {
+    PLATFORM::CEvent::Sleep(1000);
+
+    next = GetTimeMs();
+
+    // reset the connection if the clock changed
+    if (next < last || next - last > 10000)
+    {
+      libcec_parameter param;
+      param.paramData = NULL; param.paramType = CEC_PARAMETER_TYPE_UNKOWN;
+      m_processor->GetLib()->Alert(CEC_ALERT_CONNECTION_LOST, param);
+      break;
+    }
+
+    last = next;
+  }
+  return NULL;
+}
+
 CCECProcessor::CCECProcessor(CLibCEC *libcec) :
     m_bInitialised(false),
     m_communication(NULL),
@@ -66,7 +94,8 @@ CCECProcessor::CCECProcessor(CLibCEC *libcec) :
     m_iLastTransmission(0),
     m_bMonitor(true),
     m_addrAllocator(NULL),
-    m_bStallCommunication(false)
+    m_bStallCommunication(false),
+    m_connCheck(NULL)
 {
   m_busDevices = new CCECDeviceMap(this);
 }
@@ -105,6 +134,7 @@ void CCECProcessor::Close(void)
   SetCECInitialised(false);
 
   // stop the processor
+  DELETE_AND_NULL(m_connCheck);
   StopThread(-1);
   m_inBuffer.Broadcast();
   StopThread();
@@ -215,6 +245,10 @@ void *CCECProcessor::Process(void)
 {
   m_libcec->AddLog(CEC_LOG_DEBUG, "processor thread started");
 
+  if (!m_connCheck)
+    m_connCheck = new CCECStandbyProtection(this);
+  m_connCheck->CreateThread();
+
   cec_command command; command.Clear();
   CTimeout activeSourceCheck(ACTIVE_SOURCE_CHECK_INTERVAL);
   CTimeout tvPresentCheck(TV_PRESENT_CHECK_INTERVAL);
diff --git a/src/lib/CECProcessor.h b/src/lib/CECProcessor.h
index 268be64..44f1fc1 100644
--- a/src/lib/CECProcessor.h
+++ b/src/lib/CECProcessor.h
@@ -52,6 +52,7 @@ namespace CEC
   class CCECTV;
   class CCECClient;
   class CCECProcessor;
+  class CCECStandbyProtection;
 
   class CCECAllocateLogicalAddress : public PLATFORM::CThread
   {
@@ -177,5 +178,17 @@ namespace CEC
       bool                                        m_bMonitor;
       CCECAllocateLogicalAddress*                 m_addrAllocator;
       bool                                        m_bStallCommunication;
+      CCECStandbyProtection*                      m_connCheck;
+  };
+
+  class CCECStandbyProtection : public PLATFORM::CThread
+  {
+  public:
+    CCECStandbyProtection(CCECProcessor* processor);
+    virtual ~CCECStandbyProtection(void);
+    void* Process(void);
+
+  private:
+    CCECProcessor* m_processor;
   };
 };
diff --git a/src/lib/adapter/Pulse-Eight/USBCECAdapterCommunication.cpp b/src/lib/adapter/Pulse-Eight/USBCECAdapterCommunication.cpp
index 07255a7..2e9c790 100644
--- a/src/lib/adapter/Pulse-Eight/USBCECAdapterCommunication.cpp
+++ b/src/lib/adapter/Pulse-Eight/USBCECAdapterCommunication.cpp
@@ -382,8 +382,7 @@ bool CUSBCECAdapterCommunication::WriteToDevice(CCECAdapterMessage *message)
   {
     LIB_CEC->AddLog(CEC_LOG_DEBUG, "error writing command '%s' to serial port '%s': %s", CCECAdapterMessage::ToString(message->Message()), m_port->GetName().c_str(), m_port->GetError().c_str());
     message->state = ADAPTER_MESSAGE_STATE_ERROR;
-    // this will trigger an alert in the reader thread
-    m_port->Close();
+    // let the higher level close the port
     return false;
   }
 
@@ -416,7 +415,7 @@ bool CUSBCECAdapterCommunication::ReadFromDevice(uint32_t iTimeout, size_t iSize
     if (m_port->GetErrorNumber())
     {
       LIB_CEC->AddLog(CEC_LOG_ERROR, "error reading from serial port: %s", m_port->GetError().c_str());
-      m_port->Close();
+      // let the higher level close the port
       return false;
     }
   }
@@ -729,6 +728,11 @@ void *CAdapterPingThread::Process(void)
         /* failed to ping the adapter 3 times in a row. something must be wrong with the connection */
         m_com->LIB_CEC->AddLog(CEC_LOG_ERROR, "failed to ping the adapter 3 times in a row. closing the connection.");
         m_com->StopThread(false);
+
+        libcec_parameter param;
+        param.paramData = NULL; param.paramType = CEC_PARAMETER_TYPE_UNKOWN;
+        m_com->LIB_CEC->Alert(CEC_ALERT_CONNECTION_LOST, param);
+
         break;
       }
     }
-- 
2.34.1