public Stream GetLiveViewImage()
{
IntPtr streamPointer = IntPtr.Zero;
IntPtr imagePointer = IntPtr.Zero;
UInt32 returnValue = EDSDKInvokes.CreateMemoryStream(0, out streamPointer);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
try
{
returnValue = EDSDKInvokes.CreateEvfImageRef(streamPointer, out imagePointer);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
try
{
returnValue = EDSDKInvokes.DownloadEvfImage(this.Handle, imagePointer);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
IntPtr imageBlob;
returnValue = EDSDKInvokes.GetPointer(streamPointer, out imageBlob);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
try
{
uint imageBlobLength;
returnValue = EDSDKInvokes.GetLength(streamPointer, out imageBlobLength);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
byte[] buffer = new byte[imageBlobLength];
Marshal.Copy(imageBlob, buffer, 0, (int)imageBlobLength);
Stream stream = new MemoryStream(buffer);
return(stream);
}
finally
{
EDSDKInvokes.Release(imageBlob);
}
}
finally
{
EDSDKInvokes.Release(imagePointer);
}
}
finally
{
EDSDKInvokes.Release(streamPointer);
}
}
/// <summary>
/// Download image to disk.
/// </summary>
/// <param name="dirRef">A reference to objects created by the event</param>
private void DownloadImage(IntPtr dirRef)
{
IntPtr stream = IntPtr.Zero;
IntPtr data = IntPtr.Zero;
DirectoryItemInformation dirItemInfo;
try
{
UInt32 returnValue = EDSDKInvokes.GetDirectoryItemInformation(dirRef, out dirItemInfo);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
string fullpath = String.Empty;
if (!String.IsNullOrEmpty(ImageSaveDirectory))
{
fullpath = System.IO.Path.Combine(ImageSaveDirectory, dirItemInfo.FileName);
}
else
{
fullpath = System.IO.Path.Combine(Environment.CurrentDirectory, dirItemInfo.FileName);
}
returnValue = EDSDKInvokes.CreateFileStream(fullpath, FileCreateDisposition.CreateAlways, Access.ReadWrite, out stream);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
returnValue = EDSDKInvokes.Download(dirRef, dirItemInfo.Size, stream);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
if (returnValue == (uint )ReturnValue.Ok)
{
returnValue = EDSDKInvokes.DownloadComplete(dirRef);
}
else
{
returnValue = EDSDKInvokes.DownloadCancel(dirRef);
}
returnValue = EDSDKInvokes.GetPointer(stream, out data);
ReturnValueManager.HandleFunctionReturnValue(returnValue);
}
catch (Exception ex)
{
Console.Out.WriteLine(ex.Message);
}
finally
{
EDSDKInvokes.Release(stream);
EDSDKInvokes.Release(data);
}
}