/// <summary>
/// 获得预览分辨率
/// </summary>
private static void GetPreviewSize()
{
var previewSizeList = MainCamera.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.VideoPreview);
var sizeList = new List <VideoEncodingProperties>();
var listCount = previewSizeList.Count;
foreach (var item in previewSizeList)
{
var sizeItem = item as VideoEncodingProperties;
if (sizeItem == null)
{
continue;
}
if (sizeItem.Width < AppDefaultHelper.CAMERA_VGA_WIDTH || sizeItem.Height < AppDefaultHelper.CAMERA_VGA_HEIGHT)
{
continue;
}
var oldItem = sizeList.FirstOrDefault(li => (li.Width == sizeItem.Width && li.Height == sizeItem.Height));
if (oldItem != null)
{
uint oldRate = oldItem.FrameRate.Numerator / oldItem.FrameRate.Denominator;
uint rate = sizeItem.FrameRate.Numerator / sizeItem.FrameRate.Denominator;
if (oldRate < rate)
{
sizeList.Remove(oldItem);
}
else
{
continue;
}
}
sizeList.Add(sizeItem);
}
if (CameraPreviewSizeList == null)
{
CameraPreviewSizeList = new List <CameraSizeInfo>();
}
else
{
CameraPreviewSizeList.Clear();
}
foreach (var item in sizeList.OrderBy(li => li.Width))
{
CameraPreviewSizeList.Add(new CameraSizeInfo(item, item.Width, item.Height));
}
}
/// <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>
/// 设置分辨率
/// </summary>
private static async Task SetSize()
{
try
{
var width = ConfigHelper.Info.CameraPhotoSizeWidth;
var height = ConfigHelper.Info.CameraPhotoSizeHeight;
if (IsHavePhotoStream == true)
{
//获得分辨率
CameraSizeInfo photoSize = null;
foreach (var item in CameraPhotoSizeList)
{
if (item.Width == width && item.Height == height)
{
photoSize = item;
break;
}
}
if (photoSize == null)
{
var maxTag = CameraPhotoSizeList.Max(li => li.SizeTag);
photoSize = CameraPhotoSizeList.FirstOrDefault(li => li.SizeTag == maxTag);
}
var photoRato = Convert.ToDouble(photoSize.Width) / photoSize.Height;
var tempPreviewList = CameraPreviewSizeList.Where(li => Convert.ToDouble(li.Width) / li.Height == photoRato);
CameraSizeInfo previewSize = null;
if (tempPreviewList.Count() > 0)
{
var maxTag = tempPreviewList.Max(li => li.SizeTag);
previewSize = tempPreviewList.FirstOrDefault(li => li.SizeTag == maxTag);
}
else
{
var maxTag = CameraPreviewSizeList.Max(li => li.SizeTag);
previewSize = CameraPreviewSizeList.FirstOrDefault(li => li.SizeTag == maxTag);
}
if (previewSize == null)
{
return;
}
//设置
await MainCamera.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.VideoPreview, previewSize.Data);
await MainCamera.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.Photo, photoSize.Data);
}
else
{
//获得分辨率
CameraSizeInfo nowSize = null;
foreach (var item in CameraPreviewSizeList)
{
if (item.Width == width && item.Height == height)
{
nowSize = item;
break;
}
}
if (nowSize == null)
{
var maxTag = CameraPreviewSizeList.Max(li => li.SizeTag);
nowSize = CameraPreviewSizeList.FirstOrDefault(li => li.SizeTag == maxTag);
}
//设置
await MainCamera.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.VideoPreview, nowSize.Data);
}
//获得设置分辨率
var settingVideoRes = (VideoEncodingProperties)MainCamera.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview);
CurrentPreviewW = settingVideoRes.Width;
CurrentPreviewH = settingVideoRes.Height;
//获得设置分辨率
if (IsPhotoFromImagePropStream == true)
{
var settingPhotoRes = (ImageEncodingProperties)MainCamera.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.Photo);
CurrentPhotoW = settingPhotoRes.Width;
CurrentPhotoH = settingPhotoRes.Height;
}
else
{
var settingPhotoRes = (VideoEncodingProperties)MainCamera.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.Photo);
CurrentPhotoW = settingPhotoRes.Width;
CurrentPhotoH = settingPhotoRes.Height;
}
//保存设置
if (ConfigHelper.Info.CameraPhotoSizeWidth != CurrentPhotoW || ConfigHelper.Info.CameraPhotoSizeHeight != CurrentPhotoH)
{
ConfigHelper.Info.CameraPhotoSizeWidth = CurrentPhotoW;
ConfigHelper.Info.CameraPhotoSizeHeight = CurrentPhotoH;
ConfigHelper.Save();
}
}
catch (Exception ex)
{
}
}