/// <summary>
/// Close opened camera (if any) and release allocated resources.
/// </summary>
///
/// <remarks><para><note>The method also calls <see cref="StopAcquisition"/> method if it was not
/// done by user.</note></para></remarks>
///
/// <exception cref="VideoException">An error occurred while communicating with a camera. See error
/// message for additional information.</exception>
///
public void Close( )
{
lock ( sync )
{
if (deviceHandle != IntPtr.Zero)
{
if (isAcquisitionStarted)
{
try
{
StopAcquisition( );
}
catch
{
}
}
try
{
int errorCode = XimeaAPI.xiCloseDevice(deviceHandle);
HandleError(errorCode);
}
finally
{
deviceHandle = IntPtr.Zero;
}
}
}
}
/// <summary>
/// Set camera's parameter.
/// </summary>
///
/// <param name="parameterName">Parameter name.</param>
/// <param name="value">Float parameter value.</param>
///
/// <remarks><para>The method allows to control different camera's parameters, like exposure time, gain value, etc.
/// See <see cref="CameraParameter"/> class for the list of some possible configuration parameters. See
/// XIMEA documentation for the complete list of supported parameters.
/// </para></remarks>
///
/// <exception cref="VideoException">An error occurred while communicating with a camera. See error
/// message for additional information.</exception>
/// <exception cref="NotConnectedException">No camera was opened, so can not access its methods.</exception>
///
public void SetParam(string parameterName, float value)
{
lock ( sync )
{
CheckConnection( );
int errorCode = XimeaAPI.xiSetParam(deviceHandle, parameterName, ref value, 4, ParameterType.Float);
HandleError(errorCode);
}
}
/// <summary>
/// Begin camera's work cycle and start data acquisition from it.
/// </summary>
///
/// <remarks><para>The <see cref="IsAcquisitionStarted"/> property can be used at any time to find if the
/// acquisition was started or not.</para></remarks>
///
/// <exception cref="VideoException">An error occurred while communicating with a camera. See error
/// message for additional information.</exception>
/// <exception cref="NotConnectedException">No camera was opened, so can not access its methods.</exception>
///
public void StartAcquisition( )
{
lock ( sync )
{
CheckConnection( );
int errorCode = XimeaAPI.xiStartAcquisition(deviceHandle);
HandleError(errorCode);
isAcquisitionStarted = true;
}
}
/// <summary>
/// Open XIMEA camera.
/// </summary>
///
/// <param name="deviceID">Camera ID to open.</param>
///
/// <remarks><para>Opens the specified XIMEA camera preparing it for starting video acquisition
/// which is done using <see cref="StartAcquisition"/> method. The <see cref="IsDeviceOpen"/>
/// property can be used at any time to find if a camera was opened or not.</para></remarks>
///
///
public void Open(int deviceID)
{
lock (_sync)
{
int errorCode = XimeaAPI.xiOpenDevice(deviceID, out IntPtr deviceHandle);
HandleError(errorCode);
// save the device handle is everything is fine
_deviceHandle = deviceHandle;
_isAcquisitionStarted = false;
_deviceID = deviceID;
}
}
/// <summary>
/// Get camera's parameter as float value.
/// </summary>
///
/// <param name="parameterName">Parameter name to get from camera.</param>
///
/// <returns>Returns float value of the requested parameter.</returns>
///
/// <remarks><para>See <see cref="CameraParameter"/> class for the list of some possible configuration parameters. See
/// XIMEA documentation for the complete list of supported parameters.</para></remarks>
///
///
public float GetParamFloat(string parameterName)
{
lock (_sync)
{
CheckConnection();
ParameterType type = ParameterType.Float;
int errorCode = XimeaAPI.xiGetParam(_deviceHandle, parameterName, out float value, out int size, ref type);
HandleError(errorCode);
return(value);
}
}
/// <summary>
/// Get camera's parameter as integer value.
/// </summary>
///
/// <param name="parameterName">Parameter name to get from camera.</param>
///
/// <returns>Returns integer value of the requested parameter.</returns>
///
/// <remarks><para>See <see cref="CameraParameter"/> class for the list of some possible configuration parameters. See
/// XIMEA documentation for the complete list of supported parameters.</para></remarks>
///
/// <exception cref="VideoException">An error occurred while communicating with a camera. See error
/// message for additional information.</exception>
/// <exception cref="NotConnectedException">No camera was opened, so can not access its methods.</exception>
///
public int GetParamInt(string parameterName)
{
lock ( sync )
{
CheckConnection( );
int value;
int size;
ParameterType type = ParameterType.Integer;
int errorCode = XimeaAPI.xiGetParam(deviceHandle, parameterName, out value, out size, ref type);
HandleError(errorCode);
return(value);
}
}
/// <summary>
/// End camera's work cycle and stops data acquisition.
/// </summary>
///
/// <exception cref="VideoException">An error occurred while communicating with a camera. See error
/// message for additional information.</exception>
/// <exception cref="NotConnectedException">No camera was opened, so can not access its methods.</exception>
///
public void StopAcquisition( )
{
lock ( sync )
{
CheckConnection( );
try
{
int errorCode = XimeaAPI.xiStopAcquisition(deviceHandle);
HandleError(errorCode);
}
finally
{
isAcquisitionStarted = false;
}
}
}
/// <summary>
/// Get camera's parameter as string value.
/// </summary>
///
/// <param name="parameterName">Parameter name to get from camera.</param>
///
/// <returns>Returns string value of the requested parameter.</returns>
///
/// <remarks><para>See <see cref="CameraParameter"/> class for the list of some possible configuration parameters. See
/// XIMEA documentation for the complete list of supported parameters.</para></remarks>
///
/// <exception cref="VideoException">An error occurred while communicating with a camera. See error
/// message for additional information.</exception>
/// <exception cref="NotConnectedException">No camera was opened, so can not access its methods.</exception>
///
public string GetParamString(string parameterName)
{
lock ( sync )
{
CheckConnection( );
byte[] bytes = new byte[260];
int size = bytes.Length;
ParameterType type = ParameterType.String;
unsafe
{
fixed(byte *ptr = bytes)
{
int errorCode = XimeaAPI.xiGetParam(deviceHandle, parameterName, ptr, out size, ref type);
HandleError(errorCode);
}
}
return(Encoding.ASCII.GetString(bytes, 0, size));
}
}
/// <summary>
/// Get image from the opened XIMEA camera.
/// </summary>
///
/// <param name="timeout">Maximum time to wait in milliseconds till image becomes available.</param>
/// <param name="makeCopy">Make a copy of the camera's image or not.</param>
///
/// <returns>Returns image retrieved from the camera.</returns>
///
/// <remarks><para>If the <paramref name="makeCopy"/> is set to <see langword="true"/>, then the method
/// creates a managed copy of the camera's image, so the managed image stays valid even when the camera
/// is closed. However, setting this parameter to <see langword="false"/> creates a managed image which is
/// just a wrapper around camera's unmanaged image. So if camera is closed and its resources are freed, the
/// managed image becomes no longer valid and accessing it will generate an exception.</para></remarks>
///
/// <exception cref="VideoException">An error occurred while communicating with a camera. See error
/// message for additional information.</exception>
/// <exception cref="NotConnectedException">No camera was opened, so can not access its methods.</exception>
/// <exception cref="TimeoutException">Time out value reached - no image is available within specified time value.</exception>
///
public Bitmap GetImage(int timeout, bool makeCopy)
{
lock ( sync )
{
CheckConnection( );
int errorCode;
XimeaImage ximeaImage = new XimeaImage( );
unsafe
{
ximeaImage.StructSize = sizeof(XimeaImage);
}
// get image from XIMEA camera
try
{
errorCode = XimeaAPI.xiGetImage(deviceHandle, timeout, ref ximeaImage);
}
catch (AccessViolationException)
{
errorCode = 9;
}
// handle error if any
HandleError(errorCode);
// create managed bitmap for the unmanaged image provided by camera
PixelFormat pixelFormat = PixelFormat.Undefined;
int stride = 0;
switch (ximeaImage.PixelFormat)
{
case ImageFormat.Grayscale8:
pixelFormat = PixelFormat.Format8bppIndexed;
stride = ximeaImage.Width;
break;
case ImageFormat.RGB24:
pixelFormat = PixelFormat.Format24bppRgb;
stride = ximeaImage.Width * 3;
break;
case ImageFormat.RGB32:
pixelFormat = PixelFormat.Format32bppRgb;
stride = ximeaImage.Width * 4;
break;
default:
throw new VideoException("Unsupported pixel format.");
}
Bitmap bitmap = null;
if (!makeCopy)
{
bitmap = new Bitmap(ximeaImage.Width, ximeaImage.Height, stride, pixelFormat, ximeaImage.BitmapData);
}
else
{
bitmap = new Bitmap(ximeaImage.Width, ximeaImage.Height, pixelFormat);
// lock destination bitmap data
BitmapData bitmapData = bitmap.LockBits(
new Rectangle(0, 0, ximeaImage.Width, ximeaImage.Height),
ImageLockMode.ReadWrite, pixelFormat);
int dstStride = bitmapData.Stride;
int lineSize = Math.Min(stride, dstStride);
unsafe
{
byte *dst = (byte *)bitmapData.Scan0.ToPointer( );
byte *src = (byte *)ximeaImage.BitmapData.ToPointer( );
if (stride != dstStride)
{
// copy image
for (int y = 0; y < ximeaImage.Height; y++)
{
AForge.SystemTools.CopyUnmanagedMemory(dst, src, lineSize);
dst += dstStride;
src += stride;
}
}
else
{
AForge.SystemTools.CopyUnmanagedMemory(dst, src, stride * ximeaImage.Height);
}
}
// unlock destination images
bitmap.UnlockBits(bitmapData);
}
// set palette for grayscale image
if (ximeaImage.PixelFormat == ImageFormat.Grayscale8)
{
ColorPalette palette = bitmap.Palette;
for (int i = 0; i < 256; i++)
{
palette.Entries[i] = Color.FromArgb(i, i, i);
}
bitmap.Palette = palette;
}
return(bitmap);
}
}
