public CameraForView GetOrCreateCameraForView(CaptureElement view)
{
var viewTag = view.GetTag();
var reactContext = view.GetReactContext();
CameraForView result;
if (!_cameras.TryGetValue(viewTag, out result))
{
result = new CameraForView(view);
_cameras.Add(viewTag, result);
reactContext.AddLifecycleEventListener(result);
}
return(result);
}
private async Task CapturePhotoAsync(CameraForView cameraForView, JObject options, IPromise promise)
{
var mediaCapture = cameraForView.MediaCapture;
var encoding = ImageEncodingProperties.CreateJpeg();
var target = options.Value <int>("target");
using (var stream = new InMemoryRandomAccessStream())
{
await mediaCapture.CapturePhotoToStreamAsync(encoding, stream).AsTask().ConfigureAwait(false);
if (target == CameraCaptureTargetMemory)
{
var data = await GetBase64DataAsync(stream).ConfigureAwait(false);
promise.Resolve(new JObject
{
{ "data", data },
});
}
else
{
var storageFile = await GetOutputStorageFileAsync(MediaTypeImage, target).AsTask().ConfigureAwait(false);
var orientation = await cameraForView.GetCameraCaptureOrientationAsync().ConfigureAwait(false);
var photoOrientation = CameraRotationHelper.ConvertSimpleOrientationToPhotoOrientation(orientation);
await ReencodeAndSavePhotoAsync(stream, storageFile, photoOrientation).ConfigureAwait(false);
; await UpdateImagePropertiesAsync(storageFile, options).ConfigureAwait(false);
promise.Resolve(new JObject
{
{ "path", storageFile.Path },
});
}
}
}
private async Task RecordAsync(CameraForView cameraForView, JObject options, IPromise promise, CancellationToken token)
{
var mediaCapture = cameraForView.MediaCapture;
var taskCompletionSource = new TaskCompletionSource <bool>();
using (var cancellationTokenSource = new CancellationTokenSource())
using (token.Register(cancellationTokenSource.Cancel))
using (cancellationTokenSource.Token.Register(async() => await StopRecordingAsync(mediaCapture, taskCompletionSource)))
{
var quality = (VideoEncodingQuality)options.Value <int>("quality");
var encodingProfile = MediaEncodingProfile.CreateMp4(quality);
mediaCapture.AudioDeviceController.Muted = options.Value <bool>("audio");
var orientation = await cameraForView.GetCameraCaptureOrientationAsync().ConfigureAwait(false);
encodingProfile.Video.Properties.Add(RotationKey, CameraRotationHelper.ConvertSimpleOrientationToClockwiseDegrees(orientation));
var stream = default(InMemoryRandomAccessStream);
try
{
var target = options.Value <int>("target");
var outputFile = default(StorageFile);
if (target == CameraCaptureTargetMemory)
{
stream = new InMemoryRandomAccessStream();
await mediaCapture.StartRecordToStreamAsync(encodingProfile, stream).AsTask().ConfigureAwait(false);
}
else
{
outputFile = await GetOutputStorageFileAsync(MediaTypeVideo, target).AsTask().ConfigureAwait(false);
await mediaCapture.StartRecordToStorageFileAsync(encodingProfile, outputFile).AsTask().ConfigureAwait(false);
}
if (options.ContainsKey("totalSeconds"))
{
var totalSeconds = options.Value <double>("totalSeconds");
if (totalSeconds > 0)
{
cancellationTokenSource.CancelAfter(TimeSpan.FromSeconds(totalSeconds));
}
}
await taskCompletionSource.Task.ConfigureAwait(false);
if (target == CameraCaptureTargetMemory)
{
var data = await GetBase64DataAsync(stream).ConfigureAwait(false);
promise.Resolve(new JObject
{
{ "data", data },
});
}
else
{
await UpdateVideoPropertiesAsync(outputFile, options).ConfigureAwait(false);
promise.Resolve(new JObject
{
{ "path", outputFile.Path },
});
}
}
finally
{
stream?.Dispose();
}
}
_recordingCancellation.Dispose();
_recordingTask = null;
}
