/// <summary>
/// 停止预览
/// </summary>
public static async Task StopPreview()
{
try
{
if (CameraPreviewSizeList != null)
{
CameraPreviewSizeList.Clear();
}
CameraPreviewSizeList = null;
if (CameraPhotoSizeList != null)
{
CameraPhotoSizeList.Clear();
}
await CloseLowLagPhoto();
CameraPhotoSizeList = null;
IsSupportROI = false;
IsSupportContinuousCapture = false;
IsSupportHWZoom = false;
if (MainCamera != null)
{
try
{
await MainCamera.StopPreviewAsync();
}
catch (Exception ex)
{
}
try
{
MainCamera.Dispose();
}
catch (Exception ex)
{
}
}
MainCamera = null;
CurrentCamDevice = null;
FailedIndex = 1;
IsCanUseCamera = false;
}
catch (Exception ex)
{
}
}
/// <summary>
/// 获得照片分辨率
/// </summary>
private static void GetPhotoSize()
{
if (PhotoSource == PhotoCaptureSource.VideoPreview)
{
return;
}
var photoSizeList = MainCamera.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.Photo);
var imageSizeList = new List <ImageEncodingProperties>();
var videoSizeList = new List <VideoEncodingProperties>();
foreach (var item in photoSizeList)
{
if (item.Type == "Image")
{
var imageSize = (ImageEncodingProperties)item;
if (imageSize.Width < AppDefaultHelper.CAMERA_VGA_WIDTH || imageSize.Height < AppDefaultHelper.CAMERA_VGA_HEIGHT)
{
continue;
}
imageSizeList.Add(imageSize);
}
else
{
var videoSize = (VideoEncodingProperties)item;
if (videoSize.Width < AppDefaultHelper.CAMERA_VGA_WIDTH || videoSize.Height < AppDefaultHelper.CAMERA_VGA_HEIGHT)
{
continue;
}
var oldItem = videoSizeList.FirstOrDefault(li => li.Width == videoSize.Width && li.Height == videoSize.Height);
if (oldItem == null)
{
videoSizeList.Add(videoSize);
}
}
}
if (CameraPhotoSizeList == null)
{
CameraPhotoSizeList = new List <CameraSizeInfo>();
}
else
{
CameraPhotoSizeList.Clear();
}
if (imageSizeList.Count > 0)
{
imageSizeList.Sort((Comparison <ImageEncodingProperties>)((p1, p2) =>
{
if (p1 == null || p2 == null)
{
return(0);
}
uint pixels0 = p1.Height * p1.Width;
uint pixels1 = p2.Height * p2.Width;
if (pixels0 > pixels1)
{
return(1);
}
return((int)pixels0 == (int)pixels1 ? 0 : -1);
}));
foreach (var item in imageSizeList)
{
CameraPhotoSizeList.Add(new CameraSizeInfo(item, item.Width, item.Height));
}
IsPhotoFromImagePropStream = true;
}
else if (videoSizeList.Count > 0)
{
videoSizeList.Sort((Comparison <VideoEncodingProperties>)((p1, p2) =>
{
if (p1 == null || p2 == null)
{
return(0);
}
uint pixels0 = p1.Height * p1.Width;
uint pixels1 = p2.Height * p2.Width;
if (pixels0 > pixels1)
{
return(1);
}
return((int)pixels0 == (int)pixels1 ? 0 : -1);
}));
foreach (var item in videoSizeList)
{
CameraPhotoSizeList.Add(new CameraSizeInfo(item, item.Width, item.Height));
}
IsPhotoFromImagePropStream = false;
}
}