/// <summary>
/// Initializes a new instance of the <see cref="Reader" /> class.
/// </summary>
/// <param name="capture">MediaCapture instance.</param>
/// <param name="width">Capture frame width.</param>
/// <param name="height">Capture frame height.</param>
public Reader(MediaCapture capture, uint width, uint height)
{
this.capture = capture;
this.encodingProps = new ImageEncodingProperties { Subtype = "BMP", Width = width, Height = height};
this.barcodeFound = false;
this.cancelSearch = new CancellationTokenSource();
}
public async Task InitializeAsync()
{
_mediaCapture = new MediaCapture();
await _mediaCapture.InitializeAsync();
_imageEncodingProperties = ImageEncodingProperties.CreateJpeg();
}
private async void Page_Loaded(object sender, RoutedEventArgs e)
{
await InitializeQrCode();
var imgProp = new ImageEncodingProperties { Subtype = "BMP", Width = 600, Height = 800 };
var bcReader = new BarcodeReader();
while (true)
{
var stream = new InMemoryRandomAccessStream();
await _mediaCapture.CapturePhotoToStreamAsync(imgProp, stream);
stream.Seek(0);
var wbm = new WriteableBitmap(600, 800);
await wbm.SetSourceAsync(stream);
var result = bcReader.Decode(wbm);
if (result != null)
{
var msgbox = new MessageDialog(result.Text);
await msgbox.ShowAsync();
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Reader" /> class.
/// </summary>
/// <param name="capture">MediaCapture instance.</param>
/// <param name="width">Capture frame width.</param>
/// <param name="height">Capture frame height.</param>
public void Init(MediaCapture capture, uint width, uint height)
{
this.capture = capture;
encodingProps = ImageEncodingProperties.CreateJpeg();
encodingProps.Width = width;
encodingProps.Height = height;
barcodeReader = new BarcodeReader {Options = {TryHarder = true}};
cancelSearch = new CancellationTokenSource();
}
async private void CapturePhoto_Click(object sender, RoutedEventArgs e)
{
imgFormat = ImageEncodingProperties.CreateJpeg();
file = await ApplicationData.Current.LocalFolder.CreateFileAsync
("1.jpg", CreationCollisionOption.GenerateUniqueName);
//using (IsolatedStorage store = IsolatedStorageFile.GetUserStoreForApplication())
await captureManager.CapturePhotoToStorageFileAsync(imgFormat, file);
//bmpImage = new BitmapImage(new Uri(file.Path));
//imagePreview.Source = bmpImage;
}
public async Task<MediaCapture> Initialize(CaptureUse primaryUse = CaptureUse.Photo)
{
// Create MediaCapture and init
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync();
mediaCapture.VideoDeviceController.PrimaryUse = primaryUse;
// Create photo encoding properties as JPEG and set the size that should be used for photo capturing
imgEncodingProperties = ImageEncodingProperties.CreateJpeg();
imgEncodingProperties.Width = 640;
imgEncodingProperties.Height = 480;
// Create video encoding profile as MP4
videoEncodingProperties = MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Auto);
// Lots of properties for audio and video could be set here...
return mediaCapture;
}
//System.Collections.Generic.IReadOnlyList<IMediaEncodingProperties> res;
#endregion
#region Constructor
/// <summary>
/// Initializes a new instance of the <see cref="Reader" /> class.
/// </summary>
/// <param name="capture">MediaCapture instance.</param>
/// <param name="width">Capture frame width.</param>
/// <param name="height">Capture frame height.</param>
public void Init(MediaCapture capture, uint width, uint height)
{
this.capture = capture;
encodingProps = ImageEncodingProperties.CreatePng();
encodingProps.Width = 1366;
encodingProps.Height = 768;
barcodeReader = new BarcodeReader
{
Options =
{
TryHarder = true,
PossibleFormats = new BarcodeFormat[] { BarcodeFormat.QR_CODE },
}
};
cancelSearch = new CancellationTokenSource();
}
public async Task<MediaCapture> Initialize(CaptureUse primaryUse = CaptureUse.Photo)
{
var devices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
mediaCapture = new MediaCapture();
if (devices.Count() > 0)
{
await this.mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings { VideoDeviceId = devices.ElementAt(1).Id, PhotoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.VideoPreview });
}
mediaCapture.VideoDeviceController.PrimaryUse = primaryUse;
mediaCapture.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
imgEncodingProperties = ImageEncodingProperties.CreateJpeg();
imgEncodingProperties.Width = 640;
imgEncodingProperties.Height = 480;
videoEncodingProperties = MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Auto);
return mediaCapture;
}
/// <summary>
/// Captures a photo to a stream asynchronously.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="imageEncodingProperties">The image encoding properties.</param>
/// <returns></returns>
public async Task CapturePhotoToStreamAsync(IRandomAccessStream stream, ImageEncodingProperties imageEncodingProperties)
{
await MediaCapture.CapturePhotoToStreamAsync(imageEncodingProperties, stream);
}
private async void ScanBarCode()
{
var imgProp = new ImageEncodingProperties { Subtype = "BMP", Width = 450, Height = 450 };
var bcReader = new BarcodeReader();
while (exit == 0)
{
var stream = new InMemoryRandomAccessStream();
await _mediaCapture.CapturePhotoToStreamAsync(imgProp, stream);
stream.Seek(0);
var wbm = new WriteableBitmap(450, 450);
await wbm.SetSourceAsync(stream);
var result = bcReader.Decode(wbm);
if (result != null)
{
exit = 1;
int swissmedicNr = 0;
try
{
swissmedicNr = Int32.Parse(result.Text.Substring(3, 6));
}
catch { }
if(swissmedicNr > 0)
{
Drug med = DatabaseStore.GetDrugForSwissMedicNumber(swissmedicNr);
List<Drug> list = new List<Drug>();
if(med != null)
{
list.Add(med);
}
Frame.Navigate(typeof(SearchDrugResults), list);
}
}
await Task.Delay(TimeSpan.FromSeconds(1));
}
}
private async Task ScanPreviewBuffer()
{
try
{
using ( var stream = new InMemoryRandomAccessStream() )
{
// Fairly small values to avoid scanning very large images
var props = new ImageEncodingProperties
{
Subtype = "BMP",
Width = 600,
Height = 800
};
await _camera.CapturePhotoToStreamAsync( props, stream );
var bitmap = new WriteableBitmap( (int) props.Width, (int) props.Height );
stream.Seek( 0 );
await bitmap.SetSourceAsync( stream );
var reader = new BarcodeReader();
var result = reader.Decode( bitmap );
if ( result != null )
{
ProcessResultText( result.Text );
}
}
}
catch
{
// The camera is prone to odd things. Don't crash.
}
}
/// <summary>
/// Creates a new <see cref="CapturedImageFrame"/> instance from the <paramref name="stream"/> specified.
/// </summary>
/// <param name="stream">Captured image stream.</param>
/// <param name="encoding">Encoding used to capture the frame <paramref name="stream"/></param>
/// <param name="orientation">Camera orientation.</param>
/// <param name="cameraType">Camera type.</param>
/// <returns>Captured image frame.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="stream"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="encoding"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="stream"/> cannot be read.
/// <para>-or-</para>
/// <paramref name="stream"/> is empty.
/// </exception>
public static CapturedImageFrame CreateFromStream(IRandomAccessStream stream, ImageEncodingProperties encoding, PageOrientation orientation, CameraType cameraType)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream cannot be read.", "stream");
}
if (stream.Size == 0)
{
throw new ArgumentException("Stream is empty.", "stream");
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
return new CapturedImageFrame
{
Rotation = OrientationHelper.ConvertOrientationToRotation(orientation, cameraType),
Flip = OrientationHelper.ConvertOrientationToFlip(orientation, cameraType),
Stream = stream,
Height = encoding.Height,
Width = encoding.Width
};
}
private void SetEncodingProperties(CaptureUse captureUse)
{
if (this._videoEncodingProfile.Video != null)
{
if (captureUse == CaptureUse.Photo)
{
var allProps =
this._mediaCapture.VideoDeviceController.GetAvailableMediaStreamProperties(
MediaStreamType.Photo);
var photoProps = GetMediaProperties(allProps, CaptureUse.Photo) as ImageEncodingProperties;
if (photoProps == null)
{
var videoProps = GetMediaProperties(allProps, CaptureUse.Video) as VideoEncodingProperties;
if (videoProps != null)
{
this._imageEncodingProperties.Height = videoProps.Height;
this._imageEncodingProperties.Width = videoProps.Width;
this._mediaEncodingProperties = videoProps;
}
else
{
VideoEncodingProperties maxProps = null;
var max = 0;
foreach (var res in from res in allProps.OfType<VideoEncodingProperties>()
where res.Width * res.Height > max
select res)
{
max = (int)(res.Width * res.Height);
maxProps = res;
}
if (maxProps != null)
{
this._imageEncodingProperties.Height = maxProps.Height;
this._imageEncodingProperties.Width = maxProps.Width;
this._mediaEncodingProperties = maxProps;
}
}
}
else
{
this._imageEncodingProperties = photoProps;
this._mediaEncodingProperties = this._imageEncodingProperties;
}
}
else
{
var mediaStreamProps =
this._mediaCapture.VideoDeviceController.GetAvailableMediaStreamProperties(
MediaStreamType.VideoPreview).ToList();
var videoProps =
mediaStreamProps.OfType<VideoEncodingProperties>()
.FirstOrDefault(
x =>
x != null && this._supportedVideoFormats.Contains(x.Subtype.ToLower())
&& x.Width == this._videoEncodingProfile.Video.Width
&& x.Height == this._videoEncodingProfile.Video.Height);
if (videoProps != null)
{
this._mediaEncodingProperties = videoProps;
}
else
{
var allVideoProps =
mediaStreamProps.OfType<VideoEncodingProperties>()
.Where(
x =>
x != null && this._supportedVideoFormats.Contains(x.Subtype.ToLower())
&& x.Width <= this._videoEncodingProfile.Video.Width
&& x.Height <= this._videoEncodingProfile.Video.Height);
VideoEncodingProperties maxVideoPropsRatio = null;
var max = 0;
foreach (var res in from res in allVideoProps
where res.Width * res.Height > max
let ratio = (double)res.Width / res.Height
where ratio > 1.34
select res)
{
max = (int)(res.Width * res.Height);
maxVideoPropsRatio = res;
}
if (maxVideoPropsRatio != null)
{
this._mediaEncodingProperties = maxVideoPropsRatio;
}
else
{
VideoEncodingProperties maxVideoProps = null;
max = 0;
foreach (var res in from res in allVideoProps
where res.Width * res.Height > max
select res)
{
max = (int)(res.Width * res.Height);
maxVideoProps = res;
}
if (maxVideoProps != null)
{
this._mediaEncodingProperties = maxVideoProps;
}
}
}
}
}
}
/// <summary>
/// Initializes the <see cref="MediaCapture"/> element.
/// </summary>
/// <param name="primaryUse">
/// The primary use for the camera.
/// </param>
/// <param name="videoQuality">
/// The video quality (for recording only).
/// </param>
/// <returns>
/// The <see cref="MediaCapture"/>.
/// </returns>
public async Task<MediaCapture> Initialize(
CaptureUse primaryUse,
VideoEncodingQuality videoQuality)
{
if (this._mediaCapture != null)
{
this.Dispose();
}
this.IsCameraAvailable = true;
var camera = await this.GetCamera(this.ActiveCamera);
this._mediaCapture = new MediaCapture();
this._mediaCapture.Failed += this.OnMediaCaptureFailed;
await
this._mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings { VideoDeviceId = camera.Id });
this._mediaCapture.VideoDeviceController.PrimaryUse = primaryUse;
this._imageEncodingProperties = ImageEncodingProperties.CreateJpeg();
this._videoEncodingProfile = MediaEncodingProfile.CreateMp4(videoQuality);
this.SetEncodingProperties(primaryUse);
var rotation = this.GetVideoRotation(DisplayInformation.GetForCurrentView().CurrentOrientation);
if (primaryUse == CaptureUse.Photo)
{
await
this._mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(
MediaStreamType.Photo,
this._mediaEncodingProperties);
this.IsFlashAvailable = this.Settings.FlashControl.Supported;
}
else if (primaryUse == CaptureUse.Video)
{
await
this._mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(
MediaStreamType.VideoPreview,
this._mediaEncodingProperties);
await
this._mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(
MediaStreamType.VideoRecord,
this._mediaEncodingProperties);
this.SetRecordOrientation(rotation);
this.IsFlashAvailable = this.Settings.TorchControl.Supported;
}
this._mediaCapture.SetPreviewRotation(rotation);
return this._mediaCapture;
}
private async void ScanQrCode()
{
string retCode = String.Empty;
try
{
await InitializeQrCode();
var imgProp = new ImageEncodingProperties
{
Subtype = "BMP",
Width = 380,
Height = 380
};
var bcReader = new BarcodeReader();
while (exit == 0)
{
var stream = new InMemoryRandomAccessStream();
await _mediaCapture.CapturePhotoToStreamAsync(imgProp, stream);
stream.Seek(0);
var wbm = new WriteableBitmap(380, 380);
await wbm.SetSourceAsync(stream);
var result = bcReader.Decode(wbm);
if (result != null)
{
var torch = _mediaCapture.VideoDeviceController.TorchControl;
if (torch.Supported) torch.Enabled = false;
await _mediaCapture.StopPreviewAsync();
retCode = result.Text;
//var msgbox = new MessageDialog(result.Text);
//await msgbox.ShowAsync();
exit = 1;
//try
//{
// StorageFolder folder = ApplicationData.Current.LocalFolder;
// if (folder != null)
// {
// //Saving Scan Text
// StorageFile sampleFile = await folder.CreateFileAsync("sample.txt", CreationCollisionOption.ReplaceExisting);
// await Windows.Storage.FileIO.WriteTextAsync(sampleFile, "Swift as a shadow");
// //Saving Scan Image
// StorageFile file = await folder.CreateFileAsync("imagefile" + ".jpg", CreationCollisionOption.ReplaceExisting);
// using (var storageStream = await file.OpenAsync(FileAccessMode.ReadWrite))
// {
// var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, storageStream);
// var pixelStream = wbm.PixelBuffer.AsStream();
// var pixels = new byte[pixelStream.Length];
// await pixelStream.ReadAsync(pixels, 0, pixels.Length);
// encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, (uint)wbm.PixelWidth, (uint)wbm.PixelHeight, 48, 48, pixels);
// await encoder.FlushAsync();
// }
// }
// //MyImage.Source = wbm;
// exit = 1;
//}
//catch (Exception ex)
//{
// MessageDialog dialog = new MessageDialog("Error while initializing media capture device: " + ex.Message);
// dialog.ShowAsync();
// GC.Collect();
//}
//
}
}
KeyValuePair<string, string> retObj = new KeyValuePair<string, string>("UserCode", retCode);
_mediaCapture.Dispose();
Frame.Navigate(typeof(Login), retObj);
}
catch { }
}
