/// <summary>
/// Performs the one time initialization and shows the preview (if video).
/// </summary>
/// <returns></returns>
private async Task<CameraInitializationResult> InitializeAsync()
{
CameraInitializationResult result;
try
{
Debug.Assert(Dispatcher.HasThreadAccess);
if (_initializationTaskSource != null)
{
// Already initializing or initialized
await _initializationTaskSource.Task;
_initializationTaskSource = new TaskCompletionSource<CameraInitializationResult>();
}
_internalState = CameraCaptureControlStates.Initializing;
_initializationTaskSource = new TaskCompletionSource<CameraInitializationResult>();
if (_currentAudioCaptureDeviceIndex < 0 &&
(this.StreamingCaptureMode == StreamingCaptureMode.AudioAndVideo ||
this.StreamingCaptureMode == StreamingCaptureMode.Audio))
{
await FindAudioCaptureDevicesAsync();
if (_audioCaptureDevices.Length == 0)
{
if (this.StreamingCaptureMode == StreamingCaptureMode.Audio)
{
_internalState = CameraCaptureControlStates.Hidden;
Debugger.Break();
result = new CameraInitializationResult(false, "No audio devices found.");
_initializationTaskSource.SetResult(result);
return result;
}
}
else if (this.AudioDeviceId != null)
{
var device = _audioCaptureDevices.FirstOrDefault(d => d.Id == this.AudioDeviceId);
if (device != null)
{
_currentAudioCaptureDeviceIndex = Array.IndexOf(_audioCaptureDevices, device);
}
}
else if (this.PickAudioDeviceAutomatically)
{
_currentAudioCaptureDeviceIndex = 0;
}
else
{
await ShowMicrophoneSelector();
}
}
if (_currentVideoCaptureDeviceIndex < 0 &&
(this.StreamingCaptureMode == StreamingCaptureMode.AudioAndVideo ||
this.StreamingCaptureMode == StreamingCaptureMode.Video))
{
await FindVideoCaptureDevicesAsync();
if (_videoCaptureDevices.Length == 0)
{
if (this.StreamingCaptureMode == StreamingCaptureMode.Video)
{
Debugger.Break();
_internalState = CameraCaptureControlStates.Hidden;
result = new CameraInitializationResult(false, "No video devices found.");
_initializationTaskSource.SetResult(result);
return result;
}
// Audio only
result = new CameraInitializationResult(true);
_initializationTaskSource.SetResult(result);
return result;
}
if (_videoCaptureDevices.Length == 1)
{
_currentVideoCaptureDeviceIndex = 0;
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return result;
}
if (this.VideoDeviceId != null)
{
var device = _videoCaptureDevices.FirstOrDefault(d => d.Id == this.VideoDeviceId);
if (device != null)
{
_currentVideoCaptureDeviceIndex = Array.IndexOf(_videoCaptureDevices, device);
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return result;
}
// If requested device was not found - don't give up, but look for another one
}
if (_preferredVideoCaptureDevice != null)
{
_currentVideoCaptureDeviceIndex = Array.IndexOf(_videoCaptureDevices, _preferredVideoCaptureDevice);
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return result;
}
if (PickVideoDeviceAutomatically)
{
_currentVideoCaptureDeviceIndex = 0;
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return result;
}
bool success = await ShowWebCamSelector();
if (success)
{
result = new CameraInitializationResult(true);
_initializationTaskSource.SetResult(result);
return result;
}
result = new CameraInitializationResult(false, "Unable to select video device.");
_initializationTaskSource.SetResult(result);
return result;
}
// Audio only recording
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return result;
}
catch (Exception ex)
{
result = new CameraInitializationResult(false, "An unkown error has occured.", ex);
if (_initializationTaskSource != null)
{
_initializationTaskSource.SetResult(result);
}
return result;
}
}
/// <summary>
/// Performs the one time initialization and shows the preview (if video).
/// </summary>
/// <returns></returns>
private async Task <CameraInitializationResult> InitializeAsync()
{
CameraInitializationResult result;
try
{
Debug.Assert(Dispatcher.HasThreadAccess);
if (_initializationTaskSource != null)
{
// Already initializing or initialized
await _initializationTaskSource.Task;
_initializationTaskSource = new TaskCompletionSource <CameraInitializationResult>();
}
_internalState = CameraCaptureControlStates.Initializing;
_initializationTaskSource = new TaskCompletionSource <CameraInitializationResult>();
if (_currentAudioCaptureDeviceIndex < 0 &&
(this.StreamingCaptureMode == StreamingCaptureMode.AudioAndVideo ||
this.StreamingCaptureMode == StreamingCaptureMode.Audio))
{
await FindAudioCaptureDevicesAsync();
if (_audioCaptureDevices.Length == 0)
{
if (this.StreamingCaptureMode == StreamingCaptureMode.Audio)
{
_internalState = CameraCaptureControlStates.Hidden;
Debugger.Break();
result = new CameraInitializationResult(false, "No audio devices found.");
_initializationTaskSource.SetResult(result);
return(result);
}
}
else if (this.AudioDeviceId != null)
{
var device = _audioCaptureDevices.FirstOrDefault(d => d.Id == this.AudioDeviceId);
if (device != null)
{
_currentAudioCaptureDeviceIndex = Array.IndexOf(_audioCaptureDevices, device);
}
}
else if (this.PickAudioDeviceAutomatically)
{
_currentAudioCaptureDeviceIndex = 0;
}
else
{
await ShowMicrophoneSelector();
}
}
if (_currentVideoCaptureDeviceIndex < 0 &&
(this.StreamingCaptureMode == StreamingCaptureMode.AudioAndVideo ||
this.StreamingCaptureMode == StreamingCaptureMode.Video))
{
await FindVideoCaptureDevicesAsync();
if (_videoCaptureDevices.Length == 0)
{
if (this.StreamingCaptureMode == StreamingCaptureMode.Video)
{
Debugger.Break();
_internalState = CameraCaptureControlStates.Hidden;
result = new CameraInitializationResult(false, "No video devices found.");
_initializationTaskSource.SetResult(result);
return(result);
}
// Audio only
result = new CameraInitializationResult(true);
_initializationTaskSource.SetResult(result);
return(result);
}
if (_videoCaptureDevices.Length == 1)
{
_currentVideoCaptureDeviceIndex = 0;
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return(result);
}
if (this.VideoDeviceId != null)
{
var device = _videoCaptureDevices.FirstOrDefault(d => d.Id == this.VideoDeviceId);
if (device != null)
{
_currentVideoCaptureDeviceIndex = Array.IndexOf(_videoCaptureDevices, device);
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return(result);
}
// If requested device was not found - don't give up, but look for another one
}
if (_preferredVideoCaptureDevice != null)
{
_currentVideoCaptureDeviceIndex = Array.IndexOf(_videoCaptureDevices, _preferredVideoCaptureDevice);
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return(result);
}
if (PickVideoDeviceAutomatically)
{
_currentVideoCaptureDeviceIndex = 0;
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return(result);
}
bool success = await ShowWebCamSelector();
if (success)
{
result = new CameraInitializationResult(true);
_initializationTaskSource.SetResult(result);
return(result);
}
result = new CameraInitializationResult(false, "Unable to select video device.");
_initializationTaskSource.SetResult(result);
return(result);
}
// Audio only recording
result = await this.StartPreviewAsync();
_initializationTaskSource.SetResult(result);
return(result);
}
catch (Exception ex)
{
result = new CameraInitializationResult(false, "An unkown error has occured.", ex);
if (_initializationTaskSource != null)
{
_initializationTaskSource.SetResult(result);
}
return(result);
}
}
