FrameHandler.cpp

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/*=============================================================================
  Copyright (C) 2012 Allied Vision Technologies.  All Rights Reserved.

  Redistribution of this file, in original or modified form, without
  prior written consent of Allied Vision Technologies is prohibited.

-------------------------------------------------------------------------------

  File:        FrameHandler.cpp

  Description: Implementation of class AVT::VmbAPI::FrameHandler.

-------------------------------------------------------------------------------

  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF TITLE,
  NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR  PURPOSE ARE
  DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  
  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 
  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=============================================================================*/

#include <VimbaCPP/Source/FrameHandler.h>

#include <VimbaCPP/Include/LoggerDefines.h>

namespace AVT {
namespace VmbAPI {

FrameHandler::FrameHandler( FramePtr pFrame, IFrameObserverPtr pFrameObserver )
    :   m_pFrame( pFrame )
    ,   m_pObserver( pFrameObserver )
    ,   m_pMutex( new Mutex() )
{
}

FramePtr FrameHandler::GetFrame() const
{
    return m_pFrame;
}

bool FrameHandler::EnterWriteLock( bool bExclusive )
{
    return m_conditionHelper.EnterWriteLock( m_pMutex, bExclusive );
}

void FrameHandler::ExitWriteLock()
{
    m_conditionHelper.ExitWriteLock( m_pMutex );
}

bool FrameHandler::EnterReadLock()
{
    return m_conditionHelper.EnterReadLock( m_pMutex );
}

void FrameHandler::ExitReadLock()
{
    m_conditionHelper.ExitReadLock( m_pMutex );
}

void VMB_CALL FrameHandler::FrameDoneCallback( const VmbHandle_t /*handle*/, VmbFrame_t *pVmbFrame )
{
    if ( NULL != pVmbFrame )
    {
        FrameHandler* pFrameHandler = reinterpret_cast<FrameHandler*>( pVmbFrame->context[FRAME_HDL] );
        if ( NULL != pFrameHandler)
        {            
            // Begin read lock frame handler

            if ( true == pFrameHandler->EnterReadLock() )
            {
                {
                    IFrameObserverPtr pObs;
                    if ( true == SP_ACCESS( pFrameHandler->m_pFrame )->GetObserver( pObs ))
                    {
                        SP_ACCESS( pObs )->FrameReceived( pFrameHandler->m_pFrame );
                    }
                }// scope to destroy observer pointer before releasing the lock
                // End read lock frame handler
                pFrameHandler->ExitReadLock();
            }
            else
            {
                LOG_FREE_TEXT( "Could not lock frame handler. Skipping frame." )
            }
        }
        else // No FrameHandler
        {
            LOG_FREE_TEXT( "No frame handler passed. Frame has been removed from the frame queue." )
        }
    }
    else // pVmbFrame == NULL (Just for safety)
    {
        LOG_FREE_TEXT( "Received callback for already freed frame." )
    }
}

}}