Start using resource handler to manage different streams

app/ResourceHandle.cpp

@@ -0,0 +1,130 @@
+/*    This file is a part of Calyp project
+ *    Copyright (C) 2014-2021  by Joao Carreira   (jfmcarreira@gmail.com)
+ *                                Luis Lucas      (luisfrlucas@gmail.com)
+ *                                Joao Santos     (joaompssantos@gmail.com)
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License along
+ *   with this program; if not, write to the Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/**
+ * \file     ResourceHandle.cpp
+ * \brief    Handle resources
+ */
+
+#include "ResourceHandle.h"
+
+#include <QCoreApplication>
+#include <QEvent>
+#include <QFileInfo>
+#include <QMutex>
+#include <QThread>
+#include <memory>
+#include <optional>
+
+ResourceWorker::ResourceWorker( std::shared_ptr<CalypStream> stream )
+{
+  m_pcStream = stream;
+}
+
+void ResourceWorker::stop()
+{
+  m_bStop = true;
+  wait();
+}
+
+void ResourceWorker::run()
+{
+  while( !m_bStop )
+  {
+    m_pcStream->readNextFrameFillRGBBuffer();
+    while( !m_bStop && !m_pcStream->hasWritingSlot() )
+      ;  // Keep
+  }
+}
+
+ResourceHandle::ResourceHandle()
+{
+}
+
+auto ResourceHandle::addResource() -> CalypStream*
+{
+  auto newStreamResource = std::make_shared<CalypStream>();
+  auto newStreamResourceWorker = std::make_unique<ResourceWorker>( newStreamResource );
+  CalypStream* ptr = newStreamResource.get();
+
+  m_apcStreamResourcesList.push_back( newStreamResource );
+  m_apcStreamResourcesWorkersList.push_back( std::move( newStreamResourceWorker ) );
+  return ptr;
+}
+
+auto ResourceHandle::getResource( CalypStream* ptr ) -> CalypStream*
+{
+  if( ptr != nullptr )
+  {
+    for( auto& resource_ptr : m_apcStreamResourcesList )
+    {
+      if( resource_ptr.get() == ptr )
+        return resource_ptr.get();
+    }
+  }
+  return addResource();
+}
+
+void ResourceHandle::removeResource( CalypStream* ptr )
+{
+  std::optional<std::size_t> posToRemove;
+  for( std::size_t i = 0; i < m_apcStreamResourcesList.size(); i++ )
+  {
+    if( m_apcStreamResourcesList[i].get() == ptr )
+    {
+      posToRemove = i;
+      break;
+    }
+  }
+  if( !posToRemove.has_value() )
+  {
+    assert( false );
+    return;
+  }
+
+  // Remove worker first
+  m_apcStreamResourcesWorkersList[*posToRemove]->stop();
+  m_apcStreamResourcesWorkersList.erase( m_apcStreamResourcesWorkersList.begin() + *posToRemove );
+
+  // Then the underlying stream
+  m_apcStreamResourcesList.erase( m_apcStreamResourcesList.begin() + *posToRemove );
+}
+
+void ResourceHandle::startResourceWorker( CalypStream* ptr )
+{
+  std::optional<std::size_t> position;
+  for( std::size_t i = 0; i < m_apcStreamResourcesList.size(); i++ )
+  {
+    if( m_apcStreamResourcesList[i].get() == ptr )
+    {
+      position = i;
+      break;
+    }
+  }
+  if( !position.has_value() )
+  {
+    assert( false );
+    return;
+  }
+  m_apcStreamResourcesWorkersList[*position]->setObjectName(
+      "RW-" +
+      QFileInfo( QString::fromStdString( m_apcStreamResourcesList[*position]->getFileName() ) ).completeBaseName() );
+  m_apcStreamResourcesWorkersList[*position]->start();
+}