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fixing issues for windows platform
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@vladyslav571 @vladimir-kotikov
vladyslav571 authored and vladimir-kotikov committed Dec 23, 2015
1 parent 8b5739f commit d68cdce
Showing 1 changed file with 96 additions and 22 deletions.
118 changes: 96 additions & 22 deletions src/windows/BarcodeScannerProxy.js
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,72 @@ var BARCODE_FORMAT = {
262144: 'PLESSEY'
};

/**
* @param {Function<Object>} callback
*/
function findCamera(callback) {
// Enumerate cameras and add them to the list
var deviceInfo = Windows.Devices.Enumeration.DeviceInformation;
deviceInfo.findAllAsync(Windows.Devices.Enumeration.DeviceClass.videoCapture).done(function (cameras) {
var camerasConfigs = cameras.map(function(camera) {
var cameraConfig = {
id: camera.id,
isFrontLocation: false,
isBackLocation: false
};

if (camera.enclosureLocation !== null) {
cameraConfig.isFrontLocation = camera.enclosureLocation.panel === Windows.Devices.Enumeration.Panel.front;
cameraConfig.isBackLocation = camera.enclosureLocation.panel === Windows.Devices.Enumeration.Panel.back;
}

return cameraConfig;
});

var selectedCameraConfig = null;
camerasConfigs.forEach(function(cameraConfig) {
if (cameraConfig.isBackLocation) {
selectedCameraConfig = cameraConfig;
}
});

if (selectedCameraConfig === null) {
selectedCameraConfig = camerasConfigs[0];
}

callback(selectedCameraConfig.id)
}, function() {
// error happened
});
}

/**
* @param {Windows.Graphics.Display.DisplayOrientations} displayOrientation
* @return {Number}
*/
function videoPreviewRotationLookup(displayOrientation) {
var degreesToRotate;

switch (displayOrientation) {
case Windows.Graphics.Display.DisplayOrientations.landscape:
degreesToRotate = 0;
break;
case Windows.Graphics.Display.DisplayOrientations.portrait:
degreesToRotate = 90;
break;
case Windows.Graphics.Display.DisplayOrientations.landscapeFlipped:
degreesToRotate = 180;
break;
case Windows.Graphics.Display.DisplayOrientations.portraitFlipped:
degreesToRotate = 270;
break;
default:
degreesToRotate = 0;
break;
}
return degreesToRotate;
}

module.exports = {

/**
Expand All @@ -48,7 +114,6 @@ module.exports = {
* @param {array} args Arguments array
*/
scan: function (success, fail, args) {

var capturePreview,
capturePreviewAlignmentMark,
captureCancelButton,
Expand All @@ -61,6 +126,7 @@ module.exports = {
* Creates a preview frame and necessary objects
*/
function createPreview() {
Windows.Graphics.Display.DisplayInformation.getForCurrentView().addEventListener("orientationchanged", updatePreviewForRotation, false);

// Create fullscreen preview
var capturePreviewFrameStyle = document.createElement('link');
Expand Down Expand Up @@ -164,35 +230,43 @@ module.exports = {
* Starts stream transmission to preview frame and then run barcode search
*/
function startPreview() {
var captureSettings = new Windows.Media.Capture.MediaCaptureInitializationSettings();
captureSettings.streamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.video;
captureSettings.photoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.videoPreview;

capture.initializeAsync(captureSettings).done(function () {

var controller = capture.videoDeviceController;
var deviceProps = controller.getAvailableMediaStreamProperties(Windows.Media.Capture.MediaStreamType.videoRecord);

deviceProps = Array.prototype.slice.call(deviceProps);
deviceProps = deviceProps.filter(function (prop) {
// filter out streams with "unknown" subtype - causes errors on some devices
return prop.subtype !== "Unknown";
}).sort(function (propA, propB) {
// sort properties by resolution
return propB.width - propA.width;
});
findCamera(function(id) {
var captureSettings = new Windows.Media.Capture.MediaCaptureInitializationSettings();
captureSettings.streamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.video;
captureSettings.photoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.videoPreview;
captureSettings.videoDeviceId = id;

capture = new Windows.Media.Capture.MediaCapture();
capture.initializeAsync(captureSettings).done(function () {

var controller = capture.videoDeviceController;
var deviceProps = controller.getAvailableMediaStreamProperties(Windows.Media.Capture.MediaStreamType.videoRecord);

deviceProps = Array.prototype.slice.call(deviceProps);
deviceProps = deviceProps.filter(function (prop) {
// filter out streams with "unknown" subtype - causes errors on some devices
return prop.subtype !== "Unknown";
}).sort(function (propA, propB) {
// sort properties by resolution
return propB.width - propA.width;
});

var maxResProps = deviceProps[0];
var maxResProps = deviceProps[0];

controller.setMediaStreamPropertiesAsync(Windows.Media.Capture.MediaStreamType.videoRecord, maxResProps).done(function () {
controller.setMediaStreamPropertiesAsync(Windows.Media.Capture.MediaStreamType.videoRecord, maxResProps).done(function () {
// handle portrait orientation
if (Windows.Graphics.Display.DisplayProperties.nativeOrientation == Windows.Graphics.Display.DisplayOrientations.portrait) {
capture.setPreviewRotation(Windows.Media.Capture.VideoRotation.clockwise90Degrees);
capturePreview.msZoom = true;
}

capturePreview.src = URL.createObjectURL(capture);
capturePreview.play();
capturePreview.src = URL.createObjectURL(capture);
capturePreview.play();

// Insert preview frame and controls into page
document.body.appendChild(capturePreview);
document.body.appendChild(capturePreviewAlignmentMark);
document.body.appendChild(captureCancelButton);

// Insert preview frame and controls into page
document.body.appendChild(capturePreviewFrame);
Expand Down

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