void MLTCam::Acquire( PvDevice *aDevice, PvStream *aStream )
{
// Get device parameters need to control streaming
PvGenParameterArray *lDeviceParams = aDevice->GetParameters();
// Map the GenICam AcquisitionStart and AcquisitionStop commands
PvGenCommand *lStart = dynamic_cast<PvGenCommand *>( lDeviceParams->Get( "AcquisitionStart" ) );
PvGenCommand *lStop = dynamic_cast<PvGenCommand *>( lDeviceParams->Get( "AcquisitionStop" ) );
// Get stream parameters
PvGenParameterArray *lStreamParams = aStream->GetParameters();
// Map a few GenICam stream stats counters
PvGenFloat *lFrameRate = dynamic_cast<PvGenFloat *>( lStreamParams->Get( "AcquisitionRate" ) );
PvGenFloat *lBandwidth = dynamic_cast<PvGenFloat *>( lStreamParams->Get( "Bandwidth" ) );
// Enable streaming and send the AcquisitionStart command
//qDebug() << "Enabling streaming and sending AcquisitionStart command." << endl;
aDevice->StreamEnable();
lStart->Execute();
char lDoodle[] = "|\\-|-/";
int lDoodleIndex = 0;
double lFrameRateVal = 0.0;
double lBandwidthVal = 0.0;
timer = new QTimer;
connect(timer, SIGNAL(timeout()), SLOT(WaitForExecution()));
timer->start(100);
// Abort all buffers from the stream and dequeue
// cout << "Aborting buffers still in stream" << endl;
// aStream->AbortQueuedBuffers();
// while ( aStream->GetQueuedBufferCount() > 0 )
// {
// PvBuffer *lBuffer = NULL;
// PvResult lOperationResult;
// aStream->RetrieveBuffer( &lBuffer, &lOperationResult );
// }
}
bool StartSlave()
{
// Let the user select the device to receive from
PvString lDeviceIP;
if ( !SelectDevice( lDeviceIP ) )
{
return false;
}
// Create the PvStream object
PvStream lStream;
// Create the PvPipeline object
PvPipeline lPipeline( &lStream );
// Create a PvPipeline event sink (used to trap buffer too small events)
PipelineEventSink lPipelineEventSink;
lPipeline.RegisterEventSink( &lPipelineEventSink );
// Open stream
printf( "Opening stream\n" );
lStream.Open( lDeviceIP, "239.192.1.1", 1042 );
// IMPORTANT: the pipeline needs to be "armed", or started before
// we instruct the device to send us images
printf( "Starting pipeline\n" );
lPipeline.SetBufferCount( 16 );
lPipeline.Start();
// Get stream parameters/stats
PvGenParameterArray *lStreamParams = lStream.GetParameters();
PvGenInteger *lCount = dynamic_cast<PvGenInteger *>( lStreamParams->Get( "ImagesCount" ) );
PvGenFloat *lFrameRate = dynamic_cast<PvGenFloat *>( lStreamParams->Get( "AcquisitionRateAverage" ) );
PvGenFloat *lBandwidth = dynamic_cast<PvGenFloat *>( lStreamParams->Get( "BandwidthAverage" ) );
PvGenBoolean *lIgnoreMissingPackets = dynamic_cast<PvGenBoolean *>( lStreamParams->Get( "IgnoreMissingPackets" ) );
// Disabling resend packets
lIgnoreMissingPackets->SetValue( true );
char lDoodle[] = "|\\-|-/";
int lDoodleIndex = 0;
PvInt64 lImageCountVal = 0;
double lFrameRateVal = 0.0;
double lBandwidthVal = 0.0;
// Acquire images until the user instructs us to stop
printf( "\n<press a key to stop receiving>\n" );
while ( !PvKbHit() )
{
// Retrieve next buffer
PvBuffer *lBuffer = NULL;
PvResult lOperationResult;
PvResult lResult = lPipeline.RetrieveNextBuffer( &lBuffer, 1000, &lOperationResult );
if ( lResult.IsOK() )
{
if (lOperationResult.IsOK())
{
//
// We now have a valid buffer. This is where you would typically process the buffer.
// -----------------------------------------------------------------------------------------
// ...
lCount->GetValue( lImageCountVal );
lFrameRate->GetValue( lFrameRateVal );
lBandwidth->GetValue( lBandwidthVal );
// If the buffer contains an image, display width and height
PvUInt32 lWidth = 0, lHeight = 0;
if ( lBuffer->GetPayloadType() == PvPayloadTypeImage )
{
// Get image specific buffer interface
PvImage *lImage = lBuffer->GetImage();
// Read width, height
lWidth = lBuffer->GetImage()->GetWidth();
lHeight = lBuffer->GetImage()->GetHeight();
}
printf( "%c BlockID: %016llX W: %i H: %i %.01f FPS %.01f Mb/s\r",
lDoodle[ lDoodleIndex ],
lBuffer->GetBlockID(),
lWidth,
lHeight,
lFrameRateVal,
lBandwidthVal / 1000000.0 );
}
// We have an image - do some processing (...) and VERY IMPORTANT,
// release the buffer back to the pipeline
lPipeline.ReleaseBuffer( lBuffer );
}
else
{
// Timeout
printf( "%c Timeout\r", lDoodle[ lDoodleIndex ] );
}
++lDoodleIndex %= 6;
}
PvGetChar(); // Flush key buffer for next stop
printf( "\n\n" );
// We stop the pipeline - letting the object lapse out of
// scope would have had the destructor do the same, but we do it anyway
printf( "Stop pipeline\n" );
lPipeline.Stop();
// Now close the stream. Also optionnal but nice to have
printf( "Closing stream\n" );
lStream.Close();
// Unregister pipeline event sink. Optional but nice to have.
lPipeline.UnregisterEventSink( &lPipelineEventSink );
return true;
}
