xbmc/BackgroundInfoLoader.cpp

   1 /*
   2  *      Copyright (C) 2005-2015 Team Kodi
   3  *      http://kodi.tv
   4  *
   5  *  This Program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This Program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with Kodi; see the file COPYING.  If not, see
  17  *  <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "BackgroundInfoLoader.h"
  22 #include "FileItem.h"
  23 #include "threads/SingleLock.h"
  24 #include "utils/log.h"
  25 #include "URL.h"
  26
  27 CBackgroundInfoLoader::CBackgroundInfoLoader() : m_thread (NULL)
  28 {
  29   m_bStop = true;
  30   m_pObserver=NULL;
  31   m_pProgressCallback=NULL;
  32   m_pVecItems = NULL;
  33   m_bIsLoading = false;
  34 }
  35
  36 CBackgroundInfoLoader::~CBackgroundInfoLoader()
  37 {
  38   StopThread();
  39 }
  40
  41 void CBackgroundInfoLoader::Run()
  42 {
  43   try
  44   {
  45     if (!m_vecItems.empty())
  46     {
  47       OnLoaderStart();
  48
  49       // Stage 1: All "fast" stuff we have already cached
  50       for (std::vector<CFileItemPtr>::const_iterator iter = m_vecItems.begin(); iter != m_vecItems.end(); ++iter)
  51       {
  52         CFileItemPtr pItem = *iter;
  53
  54         // Ask the callback if we should abort
  55         if ((m_pProgressCallback && m_pProgressCallback->Abort()) || m_bStop)
  56           break;
  57
  58         try
  59         {
  60           if (LoadItemCached(pItem.get()) && m_pObserver)
  61             m_pObserver->OnItemLoaded(pItem.get());
  62         }
  63         catch (...)
  64         {
  65           CLog::Log(LOGERROR, "CBackgroundInfoLoader::LoadItemCached - Unhandled exception for item %s", CURL::GetRedacted(pItem->GetPath()).c_str());
  66         }
  67       }
  68
  69       // Stage 2: All "slow" stuff that we need to lookup
  70       for (std::vector<CFileItemPtr>::const_iterator iter = m_vecItems.begin(); iter != m_vecItems.end(); ++iter)
  71       {
  72         CFileItemPtr pItem = *iter;
  73
  74         // Ask the callback if we should abort
  75         if ((m_pProgressCallback && m_pProgressCallback->Abort()) || m_bStop)
  76           break;
  77
  78         try
  79         {
  80           if (LoadItemLookup(pItem.get()) && m_pObserver)
  81             m_pObserver->OnItemLoaded(pItem.get());
  82         }
  83         catch (...)
  84         {
  85           CLog::Log(LOGERROR, "CBackgroundInfoLoader::LoadItemLookup - Unhandled exception for item %s", CURL::GetRedacted(pItem->GetPath()).c_str());
  86         }
  87       }
  88     }
  89
  90     OnLoaderFinish();
  91     m_bIsLoading = false;
  92   }
  93   catch (...)
  94   {
  95     m_bIsLoading = false;
  96     CLog::Log(LOGERROR, "%s - Unhandled exception", __FUNCTION__);
  97   }
  98 }
  99
 100 void CBackgroundInfoLoader::Load(CFileItemList& items)
 101 {
 102   StopThread();
 103
 104   if (items.IsEmpty())
 105     return;
 106
 107   CSingleLock lock(m_lock);
 108
 109   for (int nItem=0; nItem < items.Size(); nItem++)
 110     m_vecItems.push_back(items[nItem]);
 111
 112   m_pVecItems = &items;
 113   m_bStop = false;
 114   m_bIsLoading = true;
 115
 116   m_thread = new CThread(this, "BackgroundLoader");
 117   m_thread->Create();
 118   m_thread->SetPriority(THREAD_PRIORITY_BELOW_NORMAL);
 119 }
 120
 121 void CBackgroundInfoLoader::StopAsync()
 122 {
 123   m_bStop = true;
 124 }
 125
 126
 127 void CBackgroundInfoLoader::StopThread()
 128 {
 129   StopAsync();
 130
 131   if (m_thread)
 132   {
 133     m_thread->StopThread();
 134     delete m_thread;
 135     m_thread = NULL;
 136   }
 137   m_vecItems.clear();
 138   m_pVecItems = NULL;
 139   m_bIsLoading = false;
 140 }
 141
 142 bool CBackgroundInfoLoader::IsLoading()
 143 {
 144   return m_bIsLoading;
 145 }
 146
 147 void CBackgroundInfoLoader::SetObserver(IBackgroundLoaderObserver* pObserver)
 148 {
 149   m_pObserver = pObserver;
 150 }
 151
 152 void CBackgroundInfoLoader::SetProgressCallback(IProgressCallback* pCallback)
 153 {
 154   m_pProgressCallback = pCallback;
 155 }
 156