MRECT LerpRect(MRECT lastRect, MRECT nextRect, float value)
{
MRECT ret = new MRECT()
{
top = (int)(lastRect.top + (nextRect.top - lastRect.top) * value),
bottom = (int)(lastRect.bottom + (nextRect.bottom - lastRect.bottom) * value),
left = (int)(lastRect.left + (nextRect.left - lastRect.left) * value),
right = (int)(lastRect.right + (nextRect.right - lastRect.right) * value)
};
return(ret);
}
//刷新脸的核心事件
private void FaceTimer_Tick(object sender, EventArgs e)
{
if (faceTimerLock)
{
return;
}
if (timerLock)
{
return;
}
timerLock = true;
Bitmap video = new Bitmap(showPhotoBox.Image);
bool hasFace = faceFD.CheckFace(video, out AFD_FSDK_FACERES faceRes, out IntPtr offIntPtr, out IntPtr imageDataPtr);
lastRect = hasFace ? nextRect : lastRect; //刷新矩形位置
nextRect = hasFace ? faceRes.DeIntPtr().rect : new MRECT();
if (hasFace) //找到了脸
{
if (!compareLock)
{
compareLock = true; //在下一张脸解锁
byte[] data = faceFR.GetFaceData(faceRes, offIntPtr);
if (CompareFace(data, out FaceDataStruct faceData))
{
nowFace = faceData;
}
else
{
compareLock = false;
nowFace = new FaceDataStruct();
}
}
}
else
{
compareLock = false;
nowFace = new FaceDataStruct();
}
timerLock = false;
Marshal.FreeHGlobal(imageDataPtr); //释放内存
}
public byte[] GetFaceData(Bitmap bitmap, Face_FD face_FD)
{
bool isFace = face_FD.CheckFace(bitmap, out AFD_FSDK_FACERES faceRes, out IntPtr offInputPtr, out IntPtr imageDataPtr);
if (!isFace)
{
Error.Log(ErrorType.inputError);
return(null);
}
AFR_FSDK_FaceInput faceinput = new AFR_FSDK_FaceInput();
faceinput.lOrient = (int)Marshal.PtrToStructure(faceRes.lfaceOrient, typeof(int));
MRECT rect = (MRECT)Marshal.PtrToStructure(faceRes.rcFace, typeof(MRECT));
faceinput.rcFace = rect;
IntPtr faceInputPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceinput));
Marshal.StructureToPtr(faceinput, faceInputPtr, false);
AFR_FSDK_FaceModel faceModel = new AFR_FSDK_FaceModel();
IntPtr faceModelPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceModel));
int ret = FaceAPI.AFR_FSDK_ExtractFRFeature(detectEngine, offInputPtr,
faceInputPtr, faceModelPtr);
if (ret != 0) //返回值为0代表获取成功
{
Log.AddLog("获取不到人脸信息。");
return(null);
}
faceModel = (AFR_FSDK_FaceModel)Marshal.PtrToStructure(faceModelPtr, typeof(AFR_FSDK_FaceModel));
Marshal.FreeHGlobal(faceModelPtr);
byte[] byteData = new byte[faceModel.lFeatureSize];
Marshal.Copy(faceModel.pbFeature, byteData, 0, faceModel.lFeatureSize);
Marshal.FreeHGlobal(faceInputPtr);
return(byteData);
}
//刷新视频的事件
private void VideoTimer_Tick(object sender, EventArgs e)
{
if (timerLock)
{
return;
}
timerLock = true;
//解除图片框的占用
if (showPhotoBox.Image != null)
{
showPhotoBox.Image.Dispose();
}
Bitmap video = GetVideoPhoto(); //读取当前相机的照片
//对矩形进行插值
lastRect = LerpRect(lastRect, nextRect, videoInterval / faceInterval);
if (isZeroRect(nextRect)) //为了显示更流畅，设置一个缓存时间
{
if (nullNextFace++ % ((faceInterval / videoInterval + 1) * 2) == 0)
{
lastRect = new MRECT();
}
}
if (!isZeroRect(lastRect))
{
video = video.DrawRect(lastRect);
string information = nowFace._class + " " + nowFace._name;
video = video.DrawString(lastRect, information);
}
showPhotoBox.Image = video;
timerLock = false;
faceTimerLock = false;
}
//检查是否存在人脸，imageDataPtr必须在offInputPtr用完后释放掉
public bool CheckFace(Bitmap bitmap, out AFD_FSDK_FACERES faceRes, out IntPtr offInputPtr, out IntPtr imageDataPtr)
{
byte[] imageData = BitmapToBmp(bitmap, out int width, out int height, out int pitch);
imageDataPtr = Marshal.AllocHGlobal(imageData.Length);
Marshal.Copy(imageData, 0, imageDataPtr, imageData.Length);
ASVLOFFSCREEN offInput = new ASVLOFFSCREEN();
offInput.u32PixelArrayFormat = 513;
offInput.ppu8Plane = new IntPtr[4];
offInput.ppu8Plane[0] = imageDataPtr;
offInput.i32Width = width;
offInput.i32Height = height;
offInput.pi32Pitch = new int[4];
offInput.pi32Pitch[0] = pitch;
offInputPtr = Marshal.AllocHGlobal(Marshal.SizeOf(offInput));
Marshal.StructureToPtr(offInput, offInputPtr, false);
faceRes = new AFD_FSDK_FACERES();
IntPtr faceResPtr = Marshal.AllocHGlobal(Marshal.SizeOf(faceRes));
int detectResult = FaceAPI.AFD_FSDK_StillImageFaceDetection(detectEngine, offInputPtr, ref faceResPtr);
faceRes = (AFD_FSDK_FACERES)Marshal.PtrToStructure(faceResPtr, typeof(AFD_FSDK_FACERES));
MRECT rect = (MRECT)Marshal.PtrToStructure(faceRes.rcFace, typeof(MRECT));
bool ret = faceRes.nFace > 0;
imageData = null;
//Marshal.FreeHGlobal(imageDataPtr); //这个指针内存泄漏了
//Marshal.FreeHGlobal(faceResPtr);
//GC.Collect();
return(ret);
}
bool isZeroRect(MRECT rect)
{
return(rect.top == 0 && rect.bottom == 0 && rect.left == 0 && rect.right == 0);
}
