/// <summary>
/// Sets the preview window.
/// </summary>
private void SetPreviewWindow(IntPtr windowHandle)
{
// Set capture window
camWindowHandle = windowHandle;
try
{
// Connect to the capture device
if(Win32.SendMessage(camWindowHandle, Win32.WM_CAP_DRIVER_CONNECT, 0, 0) == 0)
throw new CamException("Could not connect to device.");
Win32.SendMessage(camWindowHandle, Win32.WM_CAP_SET_PREVIEW, 0, 0);
Win32.SendMessage(camWindowHandle, Win32.WM_CAP_SET_SCALE, 0, 0);
// Get device capabilities
Win32.CapDriverCaps caps = new Win32.CapDriverCaps();
Win32.SendMessage(camWindowHandle, Win32.WM_CAP_DRIVER_GET_CAPS, Marshal.SizeOf(caps), ref caps);
hasDlgVideoDisplay = caps.fHasDlgVideoDisplay != 0;
hasDlgVideoFormat = caps.fHasDlgVideoFormat != 0;
hasDlgVideoSource = caps.fHasDlgVideoSource != 0;
// Set callbacks
frameCallback = new Win32.FrameCallback(FrameCallbackProc);
if(Win32.SendMessage(camWindowHandle, Win32.WM_CAP_SET_CALLBACK_FRAME, 0, frameCallback) == 0)
throw new CamException("Could not set internal device callback.");
}
catch
{
// Clean up
Dispose();
// Forward error
throw;
}
}
/// <summary>
/// Sets the preview window.
/// </summary>
void SetPreviewWindow(IntPtr windowHandle)
{
// Set capture window
camWindowHandle = windowHandle;
var success = false;
try
{
// Connect to the capture device
if (Win32.SendMessage(camWindowHandle, Win32.WM_CAP_DRIVER_CONNECT, 0, 0) == 0)
throw new CamException("Could not connect to device.");
Win32.SendMessage(camWindowHandle, Win32.WM_CAP_SET_PREVIEW, 0, 0);
Win32.SendMessage(camWindowHandle, Win32.WM_CAP_SET_SCALE, 0, 0);
// Get device capabilities
var caps = new Win32.CapDriverCaps();
Win32.SendMessage(camWindowHandle, Win32.WM_CAP_DRIVER_GET_CAPS, Marshal.SizeOf(caps), ref caps);
hasDlgVideoDisplay = caps.fHasDlgVideoDisplay != 0;
hasDlgVideoFormat = caps.fHasDlgVideoFormat != 0;
hasDlgVideoSource = caps.fHasDlgVideoSource != 0;
// TODO: Uncomment this to test which video formats are available -- remove this when finished testing
//ShowVideoFormatDialog();
// TODO: Get a list of supported video formats and throw an exception if none of them are supported
// Set desired video format
var format = VideoFormat;
format.biCompression = 0;
format.biBitCount = 24;
VideoFormat = format;
// Set callbacks
frameCallback = FrameCallbackProc;
if (Win32.SendMessage(camWindowHandle, Win32.WM_CAP_SET_CALLBACK_FRAME, 0, frameCallback) == 0)
throw new CamException("Could not set internal device callback.");
success = true;
}
finally
{
if (!success)
Dispose();
}
}
