Properties.cpp

The Properties program shows how to handle the properties like ExposureTime and Gain of a Balluff device.

Program location

The source file Properties.cpp can be found under:

%INSTALLDIR%\apps\Properties\

Note

If you have installed the package without example applications, this file will not be available. On Windows® the sample application can be installed or removed from the target system at any time by simply restarting the installation package.

Properties example:

1. Opens a Balluff device.
2. Snaps an image (without display using Linux).
3. You can enter and set properties.

Console Output

[0]: BF000306 (mvBlueFOX-202C, Family: mvBlueFOX, interface layout: DeviceSpecific)

Please enter the number in front of the listed device followed by [ENTER] to open it: 0
Using device number 0.
Initialising the device. This might take some time...
enter quit, snap, list, help or the name of the property you want to modify followed by [ENTER]:

How it works

The image capture of this sample is equal to the SingleCapture.cpp and ContinuousCapture.cpp samples. Therefore we will focus on setting some properties in this example.

After selecting a device the user can choose what he wants to do. The program waits for the input:

bool boRun = true;
while( boRun )
{
  cout << "enter quit, snap, list, help or the name of the property you want to modify followed by [ENTER]: ";
  cin >> cmd;
  if( cmd == "snap" )
  {
    singleCapture( boMustStartAcquisition, fi, pDisp, timeout_ms );
  }
  else if( cmd == "list" )
  {
    for_each( propertyMap.begin(), propertyMap.end(), DisplayProperty() );
  }
  else if( cmd == "help" )
  {
    cout << "quit: terminates the sample" << endl
         << "snap: takes and displays one image with the current settings" << endl
         << "list: displays all properties available for this device" << endl
         << "help: displays this help text" << endl
         << "timeout: set a new timeout(in ms) used as a max. timeout to wait for an image" << endl
         << "the full name of a property must be specified" << endl;
  }
  else if( cmd == "quit" )
  {
    boRun = false;
    continue;
  }
  else if( cmd == "timeout" )
  {
    cout << "Enter the new timeout to be passed to the imageRequestWaitFor function: ";
    cin >> timeout_ms;
  }
  else
  {
    StringPropMap::const_iterator it = propertyMap.find( cmd );
    if( it == propertyMap.end() )
    {
      cout << "unknown command or property" << endl;
    }
    else
    {
      displayPropertyData( it->second );
      if( it->second.hasDict() )
      {
        cout << "This function expects the string representation as input!" << endl;
      }
      modifyPropertyValue( it->second );
    }
  }
}

'snap' takes and displays one image with the current settings

'list' displays all properties available for this device

'help' will display a help text in the console

'quit' will terminate the program

'timeout' will define a new timeout used as a max. wait timeout for a snapped image to become ready

Entering a valid property name first calls the displayPropertyData() function (from exampleHelper.h). This function will display some more information about the current property like the current value, possible min. and max. values etc.

Afterwards, the function modifyPropertyValue() will be called (from exampleHelper.h), that allows the user to enter a new value for this property. This has to be the string representation if there is more than one way to do that!

Source code

//
// @description: Example applications for Impact Acquire
// @copyright: Copyright (C) 2005 - 2020 Balluff GmbH
// @authors: APIs and drivers development team at Balluff GmbH
// @initial date: 2005-05-04
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice (including the next paragraph) shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,i
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
 
#include <algorithm>
#include <iostream>
#include <map>
#include <memory>
#include <apps/Common/exampleHelper.h>
#include <mvIMPACT_CPP/mvIMPACT_acquire.h>
#ifdef _WIN32
#   include <mvDisplay/Include/mvIMPACT_acquire_display.h>
using namespace mvIMPACT::acquire::display;
#   define USE_DISPLAY
#endif // #ifdef _WIN32
 
using namespace std;
using namespace mvIMPACT::acquire;
 
using StringPropMap = map<string, Property>;
 
//-----------------------------------------------------------------------------
struct CaptureParameter
//-----------------------------------------------------------------------------
{
    Device* pDev;
#ifdef USE_DISPLAY
    shared_ptr<ImageDisplayWindow> pDisplayWindow;
#endif // #ifdef USE_DISPLAY
    FunctionInterface fi;
    explicit CaptureParameter( Device* p ) : pDev( p ), fi( p )
    {
#ifdef USE_DISPLAY
        // IMPORTANT: It's NOT safe to create multiple display windows in multiple threads!!!
        pDisplayWindow = make_shared<ImageDisplayWindow>( "mvIMPACT_acquire sample, Device " + pDev->serial.read() );
#endif // #ifdef USE_DISPLAY
    }
    CaptureParameter( const CaptureParameter& src ) = delete;
    CaptureParameter& operator=( const CaptureParameter& rhs ) = delete;
};
 
//-----------------------------------------------------------------------------
void populatePropertyMap( StringPropMap& m, Component it, const string& currentPath = "" )
//-----------------------------------------------------------------------------
{
    while( it.isValid() )
    {
        string fullName( currentPath );
        if( fullName != "" )
        {
            fullName += "/";
        }
        fullName += it.name();
        if( it.isList() )
        {
            populatePropertyMap( m, it.firstChild(), fullName );
        }
        else if( it.isProp() )
        {
            m.insert( make_pair( fullName, Property( it ) ) );
        }
        ++it;
        // method object will be ignored...
    }
}
 
//-----------------------------------------------------------------------------
void singleCapture( CaptureParameter& params, int maxWaitTime_ms )
//-----------------------------------------------------------------------------
{
    // send a request to the default request queue of the device and
    // wait for the result.
    params.fi.imageRequestSingle();
    manuallyStartAcquisitionIfNeeded( params.pDev, params.fi );
    // wait for the image send to the default capture queue
    int requestNr = params.fi.imageRequestWaitFor( maxWaitTime_ms );
 
    // check if the image has been captured without any problems
    if( params.fi.isRequestNrValid( requestNr ) )
    {
        const Request* pRequest = params.fi.getRequest( requestNr );
        if( pRequest->isOK() )
        {
            // everything went well. Display the result...
#ifdef USE_DISPLAY
            params.pDisplayWindow->GetImageDisplay().SetImage( pRequest );
            params.pDisplayWindow->GetImageDisplay().Update();
#else
            cout << "Image captured(" << pRequest->imageWidth.read() << "x" << pRequest->imageHeight.read() << ")" << endl;
#endif  // #ifdef USE_DISPLAY
        }
        else
        {
            cout << "A request has been returned, but the acquisition was not successful. Reason: " << pRequest->requestResult.readS() << endl;
        }
        // ... unlock the request again, so that the driver can use it again
        params.fi.imageRequestUnlock( requestNr );
    }
    else
    {
        cout << "The acquisition failed: " << ImpactAcquireException::getErrorCodeAsString( requestNr ) << endl;
    }
    manuallyStopAcquisitionIfNeeded( params.pDev, params.fi );
    // in any case clear the queue to have consistent behaviour the next time this function gets called
    // as otherwise an image not ready yet might be returned directly when this function gets called the next time
    params.fi.imageRequestReset( 0, 0 );
}
 
//-----------------------------------------------------------------------------
int main( int argc, char* argv[] )
//-----------------------------------------------------------------------------
{
    DeviceManager devMgr;
    Device* pDev = nullptr;
 
    string settingName;
    for( int i = 1; i < argc; i++ )
    {
        string arg( argv[i] );
        if( arg.find( "-s" ) == 0 )
        {
            pDev = devMgr.getDeviceBySerial( arg.substr( 2 ) );
        }
        else
        {
            // try to load this setting later on...
            settingName = string( arg );
        }
    }
 
    if( argc <= 1 )
    {
        cout << "Available command line parameters:" << endl
             << endl
             << "-s<serialNumber> to pre-select a certain device. If this device can be found no further user interaction is needed" << endl
             << "any other string will be interpreted as a name of a setting to load" << endl << endl;
    }
 
    if( pDev == nullptr )
    {
        // this will automatically set the interface layout etc. to the values from the branch above
        pDev = getDeviceFromUserInput( devMgr );
    }
 
    if( pDev == nullptr )
    {
        cout << "Could not obtain a valid pointer to a device. Unable to continue!"
             << "Press [ENTER] to end the application" << endl;
        cin.get();
        return 1;
    }
    else
    {
        cout << "Initialising device: " << pDev->serial.read() << ". This might take some time..." << endl;
    }
 
    try
    {
        pDev->open();
    }
    catch( const ImpactAcquireException& e )
    {
        // this e.g. might happen if the same device is already opened in another process...
        cout << "An error occurred while opening the device(error code: " << e.getErrorCode() << ")." << endl
             << "Press [ENTER] to end the application" << endl;
        cin.get();
        return 1;
    }
 
    // create a function interface to the device
    FunctionInterface fi( pDev );
 
    if( !settingName.empty() )
    {
        cout << "Trying to load setting " << settingName << "..." << endl;
        int result = fi.loadSetting( settingName );
        if( result != DMR_NO_ERROR )
        {
            cout << "loadSetting( \"" << settingName << "\" ); call failed: " << ImpactAcquireException::getErrorCodeAsString( result ) << endl;
        }
    }
 
    CaptureParameter captureParameter( pDev );
 
    // obtain all the settings related properties available for this device
    // Only work with the 'Base' setting. For more information please refer to the manual (working with settings)
    StringPropMap propertyMap;
    DeviceComponentLocator locator( pDev, dltSetting, "Base" );
    populatePropertyMap( propertyMap, Component( locator.searchbase_id() ).firstChild() );
    try
    {
        // this category is not supported by every device, thus we can expect an exception if this feature is missing
        locator = DeviceComponentLocator( pDev, dltIOSubSystem );
        populatePropertyMap( propertyMap, Component( locator.searchbase_id() ).firstChild() );
    }
    catch( const ImpactAcquireException& ) {}
    locator = DeviceComponentLocator( pDev, dltRequest );
    populatePropertyMap( propertyMap, Component( locator.searchbase_id() ).firstChild() );
    locator = DeviceComponentLocator( pDev, dltSystemSettings );
    populatePropertyMap( propertyMap, Component( locator.searchbase_id() ).firstChild(), string( "SystemSettings" ) );
    locator = DeviceComponentLocator( pDev, dltInfo );
    populatePropertyMap( propertyMap, Component( locator.searchbase_id() ).firstChild(), string( "Info" ) );
    populatePropertyMap( propertyMap, Component( pDev->hDev() ).firstChild(), string( "Device" ) );
    string cmd;
    int timeout_ms = 500;
    bool boRun = true;
    while( boRun )
    {
        cout << "enter quit, snap, list, help, save or the name of the property you want to modify followed by [ENTER]: ";
        cin >> cmd;
 
        if( cmd == "snap" )
        {
            singleCapture( captureParameter, timeout_ms );
        }
        else if( cmd == "list" )
        {
            for_each( propertyMap.begin(), propertyMap.end(), DisplayProperty() );
        }
        else if( cmd == "help" )
        {
            cout << "quit: terminates the sample" << endl
                 << "snap: takes and displays one image with the current settings" << endl
                 << "list: displays all properties available for this device" << endl
                 << "help: displays this help text" << endl
                 << "timeout: set a new timeout(in ms) used as a max. timeout to wait for an image" << endl
                 << "the full name of a property must be specified" << endl;
        }
        else if( cmd == "quit" )
        {
            boRun = false;
            continue;
        }
        else if( cmd == "timeout" )
        {
            cout << "Enter the new timeout to be passed to the imageRequestWaitFor function: ";
            cin >> timeout_ms;
        }
        else if( cmd == "save" )
        {
            cout << "Saving global settings for the device " << pDev->serial.read() << endl;
            fi.saveSetting( pDev->serial.read(), sfNative, sGlobal );
        }
        else
        {
            StringPropMap::const_iterator it = propertyMap.find( cmd );
            if( it == propertyMap.end() )
            {
                cout << "Unknown command or property" << endl;
            }
            else
            {
                displayPropertyData( it->second );
                if( it->second.hasDict() )
                {
                    cout << "This function expects the string representation as input!" << endl;
                }
                modifyPropertyValue( it->second );
            }
        }
    }
 
    return 0;
}