private async void Button_Click(object sender, RoutedEventArgs e)
{
capture_element.Source = m_camera;
m_camera.StartPreviewAsync();
//StorageFile file = await KnownFolders.DocumentsLibrary.CreateFileAsync("_exposure.jpg", CreationCollisionOption.ReplaceExisting);
m_camera.AddEffectAsync(MediaStreamType.VideoPreview, "GrayscaleTransform.GrayscaleEffect", null);
//m_camera.StartRecordToStorageFileAsync()
float maxExp = m_camera.VideoDeviceController.ExposureCompensationControl.Max;
float minExp = m_camera.VideoDeviceController.ExposureCompensationControl.Min;
float step = m_camera.VideoDeviceController.ExposureCompensationControl.Step;
TimeSpan maxExpControl = m_camera.VideoDeviceController.ExposureControl.Max;
TimeSpan minExpControl = m_camera.VideoDeviceController.ExposureControl.Min;
TimeSpan stepExp = m_camera.VideoDeviceController.ExposureControl.Step;
TimeSpan value = m_camera.VideoDeviceController.ExposureControl.Value;
var supportedVideoFormats = new List <string> {
"nv12", "rgb32"
};
var availableMediaStreamProperties = m_camera.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.VideoRecord).OfType <Windows.Media.MediaProperties.VideoEncodingProperties>().Where(p => p != null &&
!String.IsNullOrEmpty(p.Subtype) &&
supportedVideoFormats.Contains(p.Subtype.ToLower()))
.ToList();
Windows.Media.MediaProperties.VideoEncodingProperties previewFormat = availableMediaStreamProperties.FirstOrDefault();
//previewFormat.FrameRate.Numerator = 15;
//previewFormat.FrameRate.Denominator = 1;
//availableMediaStreamProperties.All;
m_camera.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.VideoRecord, previewFormat);
m_camera.VideoDeviceController.ExposureControl.SetAutoAsync(false);
TimeSpan k = new TimeSpan(833);
m_camera.VideoDeviceController.ExposureControl.SetValueAsync(minExpControl);
await this.StreamToFile();
//m_camera.VideoDeviceController.ExposureCompensationControl.SetValueAsync(0);
//m_camera.VideoDeviceController.ExposureCompensationControl.SetValueAsync(0.0f);
//double exp;
//bool b = m_camera.VideoDeviceController.Exposure.TryGetValue(out exp);
// m_camera.VideoDeviceController.ExposureControl.SetValueAsync(new TimeSpan(1))
//m_camera.VideoDeviceController.Exposure.TrySetValue(0.00833);
//m_camera.VideoDeviceController.ExposureControl.SetAutoAsync(false);
//m_camera.VideoDeviceController.ExposureControl.SetValueAsync(new TimeSpan(10 * 2000));
// m_camera.VideoDeviceController.ExposureControl.SetValueAsync(minExpControl);
}
// <SnippetAddOverlay>
private void AddOverlay(MediaClip overlayMediaClip, double scale, double left, double top, double opacity)
{
Windows.Media.MediaProperties.VideoEncodingProperties encodingProperties =
overlayMediaClip.GetVideoEncodingProperties();
Rect overlayPosition;
overlayPosition.Width = (double)encodingProperties.Width * scale;
overlayPosition.Height = (double)encodingProperties.Height * scale;
overlayPosition.X = left;
overlayPosition.Y = top;
MediaOverlay mediaOverlay = new MediaOverlay(overlayMediaClip);
mediaOverlay.Position = overlayPosition;
mediaOverlay.Opacity = opacity;
MediaOverlayLayer mediaOverlayLayer = new MediaOverlayLayer();
mediaOverlayLayer.Overlays.Add(mediaOverlay);
composition.OverlayLayers.Add(mediaOverlayLayer);
}
/// <summary>
/// カメラ初期化（非同期）
/// </summary>
/// <returns></returns>
private async Task InitWebCameraAsync()
{
try
{
//mediaCaptureオブジェクトが有効な時は一度Disposeする
if (mediaCapture != null)
{
mediaCapture.Dispose();
mediaCapture = null;
}
//キャプチャーの設定情報を保持するインスタンスを作成
var captureInitSettings = new MediaCaptureInitializationSettings();
captureInitSettings.VideoDeviceId = "";
captureInitSettings.StreamingCaptureMode = StreamingCaptureMode.Video;
//カメラデバイスの取得
var cameraDevices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(
Windows.Devices.Enumeration.DeviceClass.VideoCapture);
//取得結果に応じて分岐
if (cameraDevices.Count() == 0) //取得デバイスなしの場合
{
Debug.WriteLine("No Camera"); //デバッグ文字列出力
return; //カメラがない場合は関数から出る
}
else if (cameraDevices.Count() == 1) //1個だけ見つかったとき
{
Debug.WriteLine("count1\n"); //デバッグ用のメッセージ
captureInitSettings.VideoDeviceId = cameraDevices[0].Id; //見つけたデバイスIDを設定
}
else //複数見つけたとき
{
Debug.WriteLine("countelse\n");
captureInitSettings.VideoDeviceId = cameraDevices[1].Id; //2個目のデバイスIDを設定
}
//キャプチャーの準備
mediaCapture = new MediaCapture(); //キャプチャインスタンスを作成
await mediaCapture.InitializeAsync(captureInitSettings); //キャプチャ設定に従って設定を初期化する
//ビデオストリームのエンコードに関する設定
Windows.Media.MediaProperties.VideoEncodingProperties vp =
new Windows.Media.MediaProperties.VideoEncodingProperties();
Debug.WriteLine("before camera size\n");
//RasperryPiでは解像度が高いと映像が乱れるので小さい解像度にしている
//ラズパイじゃなければ必要ないかも？
/*vp.Width = 640;
* vp.Height = 480;
* vp.Subtype = "RGB24";
*
* await mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.VideoPreview, vp);*/
//コントロールにキャプチャインスタンスをセット
CaptureElement_webcam.Source = mediaCapture;
//キャプチャーの開始
await mediaCapture.StartPreviewAsync();
Debug.WriteLine("Camera Initialized");
//指定周期のタイマを作成・起動
//コールバック関数にキャプチャインスタンスを渡す、遅延0ms、周期500ms
this.Timer_capture = new System.Threading.Timer(
new System.Threading.TimerCallback(TimerCapFlame),
mediaCapture, 0, 500);
}
catch (Exception ex)
{
Debug.Write(ex.Message);
}
}
