private async void CameraHelper_OnInitOver(ErrorMessageType obj)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
try
{
IsSetCamera = true;
cbxCameraList.Items.Clear();
CameraInfo selectedCamera = null;
foreach (var item in CameraHelper.CameraDevicesList)
{
cbxCameraList.Items.Add(item);
if (CameraHelper.SelectedCameraId == item.Id)
{
selectedCamera = item;
}
}
cbxCameraList.SelectedItem = selectedCamera;
cbxSizeList.Items.Clear();
var sizeList = CameraHelper.GetSizeList();
CameraSizeInfo selectedItem = null;
foreach (var item in sizeList)
{
cbxSizeList.Items.Add(item);
if (item.Width == CameraHelper.CurrentPhotoW && item.Height == CameraHelper.CurrentPhotoH)
{
selectedItem = item;
}
}
if (selectedItem == null && sizeList.Count > 0)
{
selectedItem = sizeList.First(li => li.SizeTag == sizeList.Max(li2 => li2.SizeTag));
}
cbxSizeList.SelectedItem = selectedItem;
sldZoom.Minimum = CameraHelper.MinZoomSetting;
sldZoom.Maximum = CameraHelper.MaxZoomSetting;
sldZoom.StepFrequency = CameraHelper.StepZoomSeting;
sldZoom.IsEnabled = CameraHelper.IsSupportHWZoom == true;
btnCaptureMorePhoto.IsEnabled = CameraHelper.IsSupportContinuousCapture == true;
AutoFocus.IsChecked = CameraHelper.bFocus;
AutoExposure.IsChecked = CameraHelper.bExposureAuto;
AutoBacklightCompensation.IsChecked = CameraHelper.bBacklightCompensation;
AutoWhiteBalance.IsChecked = CameraHelper.bWhiteBalance;
}
finally
{
IsSetCamera = false;
BottomAppBar.IsEnabled = true;
}
});
}
/// <summary>
/// 初始化摄像头并启动预览
/// </summary>
public static async void InitCamera(bool isNewInit = true, bool isMinZoom = false)
{
try
{
AppPathHelper.Init();
ConfigHelper.Init();
if (isNewInit == true && IsLoading == true)
{
TriggerInitCameraOver(ErrorMessageType.Camera_Start_IsLoading);
if (CameraLoadedEvent != null)
{
CameraLoadedEvent();
}
return;
}
IsLoading = true;
if (isNewInit == true)
{
FailedIndex = 1;
IsZoomEffectAdded = false;
}
//使用UI线程进行初始化，因为需要一些事件中进行调用或重试，这些事件可能在子线程中。
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
IsCanSetCamera = false;
IsCanUseCamera = false;
});
try
{
await StopPreview();
await LoadDevice();
if (CurrentCamDevice == null)
{
TriggerInitCameraOver(ErrorMessageType.Camera_Start_NoDevice);
if (CameraLoadedEvent != null)
{
CameraLoadedEvent();
}
return;
}
var useRes = IsCanUseCurrentDevice();
if (useRes != ErrorMessageType.None)
{
TriggerInitCameraOver(useRes);
if (CameraLoadedEvent != null)
{
CameraLoadedEvent();
}
return;
}
var res = await InitCamera();
if (!res)
{
TriggerInitCameraOver(ErrorMessageType.Camera_Start_UserDenied);
if (CameraLoadedEvent != null)
{
CameraLoadedEvent();
}
return;
}
if (isMinZoom)
{
AppHelper.CameraZoomNumber = MinZoomSetting;
}
SetZoom(AppHelper.CameraZoomNumber, true);
GetPreviewSize();
GetPhotoSize();
if (CameraPhotoSizeList != null)
{
IsHavePhotoStream = CameraPhotoSizeList.Count > 0;
}
else
{
IsHavePhotoStream = false;
}
//获取录像分辨率，在摄像头初始化的时候判断是否支持两种录像的分辨率。
var recordSize = MainCamera.VideoDeviceController
.GetAvailableMediaStreamProperties(MediaStreamType.VideoRecord)
.Where(li => li is VideoEncodingProperties)
.Select(li => li as VideoEncodingProperties);
var cameraSize = CameraHelper.GetSizeList();
var oneRecordSize = RecordSizeList[0];
var twoRecordSize = RecordSizeList[1];
IsCanRecord =
recordSize.Count(li => li.Width == oneRecordSize.Width && li.Height == oneRecordSize.Height) > 0 &&
cameraSize.Count(li =>
(li.Width == oneRecordSize.Width && li.Height == oneRecordSize.Height) ||
(li.Width == twoRecordSize.Width && li.Height == twoRecordSize.Height)) > 0;
//设置分辨率
await SetSize();
MainCamera.Failed += async(ds, de) =>
{
try
{
await StopPreview();
}
catch (Exception ex)
{
}
switch (de.Code)
{
case 0xC00D3EA3:
case 0xC00D3704:
TriggerInitCameraOver(ErrorMessageType.Camera_Start_AppLocked);
break;
case 0xC00D3E82:
if (FailedIndex <= 2)
{
FailedIndex++;
await Task.Delay(500);
InitCamera(false);
}
else
{
TriggerInitCameraOver(ErrorMessageType.Camera_Start_AppLocked);
}
break;
case 0x80070326:
TriggerInitCameraOver(ErrorMessageType.Camera_Start_NoAccessRight);
break;
}
};
if (OnNeedSetControls != null)
{
await OnNeedSetControls(MainCamera);
}
await MainCamera.StartPreviewAsync();
//await PrepareLowLagPhoto();
//调用结束事件
TriggerInitCameraOver(ErrorMessageType.None);
}
catch (Exception ex)
{
}
}
catch (Exception ex)
{
}
finally
{
IsLoading = false;
if (CameraLoadedEvent != null)
{
CameraLoadedEvent();
}
}
}