C# wrapper for array of three pointers
I'm currently working on a C# wrapper to work with Dallmeier Common API light.
See previous posting: C# wrapper and CallbacksI've got pretty much everything 'wrapped' but I'm stuck on wrapping a callback which contains an array of three pointers & an array integers:
dlm_setYUVDataCllback
int(int SessionHandle, void (*callback) (long IPlayerID, unsigned char** yuvData,
int* pitch, int width, int height, int64_t ts, char* extData))
Function Set callback, to receive current YUV image.
Arguments SessionHandle: handle to current session. Return PlayerID (see callback). Callback - IPlayerId: id to the Player object - yuvData: array of three pointers to Y, U and V part of image The YUV format used is YUV420 planar (not packed). char *y = yuvData[0]; char *u = yuvData[1]; char *v = yuvData[2]; - pitch: array of integers for pitches for Y, U and V part of image - width: intrinsic width of image. - height - ts : timestamp of current frame - extData: additional data to frame开发者_运维技巧How do I go about wrapping this in c#?
Any help is much appreciated.
unsigned char** yuvData
should be defined as [MarshalAs(UnmanagedType.ByValArray,SizeConst=3)] IntPtr[] yuvData
You will then get an array of 3 IntPtrs. You can the read the actual data using the Marshal.Read or Marshal.Copy.
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