JNA 调用dll 老是Invalid memory access，哭了

[weixin_45703877]

public interface KfbLibrary extends Library {
//	File libPath = new File("lib/ImageOperationLib.dll");  // windows
	File libPath = new File("C:/soft/opt/ImageOperationLib.dll");  // linux
	KfbLibrary INSTANCE = (KfbLibrary) Native.loadLibrary(libPath.getAbsolutePath(), KfbLibrary.class);

	// File identification structure
	class ImageInfoStruct extends Structure {
		public int DataFilePTR;

		@Override
		protected List<String> getFieldOrder() {
			return Arrays.asList("DataFilePTR");
		}
		
		public static class ByReference extends ImageInfoStruct implements Structure.ByReference {}
		public static class ByValue extends ImageInfoStruct implements Structure.ByValue {}
	}

	int InitImageFileFunc(ImageInfoStruct.ByReference sImageInfo, String Path);

	int UnInitImageFileFunc(ImageInfoStruct.ByReference sImageInfo);

	Pointer GetImageStreamFunc(ImageInfoStruct.ByReference sImageInfo, float fScale, int nImagePosX, int nImagePosY, IntByReference nDataLength, PointerByReference ImageStream);

	int GetHeaderInfoFunc(ImageInfoStruct.ByValue sImageInfo, IntByReference khiImageHeight, IntByReference khiImageWidth, IntByReference khiScanScale, FloatByReference khiSpendTime, DoubleByReference khiScanTime, FloatByReference khiImageCapRes, IntByReference khiImageBlockSize);
	int GetImageDataRoiFunc(ImageInfoStruct.ByReference sImageInfo, float fScale, int sp_x, int sp_y, int nWidth, int nHeight, PointerByReference pBuffer, IntByReference DataLength, boolean flag);

	int GetThumnailImageFunc(ImageInfoStruct.ByReference sImageInfo, PointerByReference ImageData, IntByReference nDataLength, IntByReference nThumbWidth, IntByReference nThumbHeight);
	int GetThumnailImagePathFunc(String szFilePath, PointerByReference ImageData, IntByReference nDataLength, IntByReference nThumbWidth, IntByReference nThumbHeight);

	int GetPriviewInfoFunc(ImageInfoStruct.ByReference sImageInfo, PointerByReference ImageData, IntByReference nDataLength, IntByReference nPriviewWidth, IntByReference nPriviewHeight);
	int GetPriviewInfoPathFunc(String szFilePath, PointerByReference ImageData, IntByReference nDataLength, IntByReference nPriviewWidth, IntByReference nPriviewHeight);
	
	int GetLableInfoFunc(ImageInfoStruct.ByReference sImageInfo, PointerByReference ImageData, IntByReference nDataLength, IntByReference nLabelWidth, IntByReference nLabelHeight);
	int GetLableInfoPathFunc(String szFilePath, PointerByReference ImageData, IntByReference nDataLength, IntByReference nLabelWidth, IntByReference nLabelHeight);

[weixin_45703877]

[weixin_45703877]

关键代码

private ImageInfoStruct.ByReference sImageInfo = new ImageInfoStruct.ByReference();
private ImageInfoStruct.ByValue sValue = new ImageInfoStruct.ByValue();

public void getHeaderInfo() {
		IntByReference khiImageHeight = new IntByReference(); 
		IntByReference khiImageWidth = new IntByReference();
		IntByReference khiScanScale = new IntByReference();
		FloatByReference khiSpendTime = new FloatByReference();
		DoubleByReference khiScanTime = new DoubleByReference();
		FloatByReference khiImageCapRes = new FloatByReference();
		IntByReference khiImageBlockSize = new IntByReference();
		int status = KfbLibrary.INSTANCE.GetHeaderInfoFunc(this.sValue, khiImageHeight, khiImageWidth, khiScanScale,
				khiSpendTime, khiScanTime, khiImageCapRes, khiImageBlockSize);
		if (status != 1) {
			System.err.println("failed to get header info");
			return;
		}
		
		this.width = khiImageWidth.getValue();
		this.height = khiImageHeight.getValue();
		this.capRes = khiImageCapRes.getValue();
/
	}

[weixin_45703877]

[shao_keke]

https://github.com/shaokeke/kfbslide.git 另加50r

[shao_keke]

代码在上面的github,只求成功调用dll 里面的GetHeaderInfoFunc 一个函数，qq499646194 50r奖励

[shao_keke]

100R，几天都没搞定