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Update camera.js #1239

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bb2f598
Update camera.js
strongstrongyiwen Aug 21, 2020
02c7cef
Update camera.js
strongstrongyiwen Aug 28, 2020
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31 changes: 20 additions & 11 deletions archived/CameraStarterKit/js/js/camera.js
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Original file line number Diff line number Diff line change
Expand Up @@ -138,7 +138,9 @@
return oMediaCapture.initializeAsync(settings)
.then(function () {
isInitialized = true;
startPreview();
// Get all available media stream properties and select the first one as default
var allProperties = oMediaCapture.videoDeviceController.getAvailableMediaStreamProperties(Capture.MediaStreamType.videoPreview);
startPreview(oMediaCapture, Capture.MediaStreamType.videoPreview, allProperties[0]);
});
}, function (error) {
console.log(error.message);
Expand Down Expand Up @@ -207,9 +209,10 @@
}

/// <summary>
/// Sets encoding properties on a camera stream. Ensures VideoElement and preview stream are stopped before setting properties.
/// Starts the preview and adjusts it for for rotation and mirroring after making a request to keep the screen on
/// </summary>
function startPreview() {
function startPreview(mediaCapture, streamType, encodingProperties) {
// Prevent the device from sleeping while the preview is running
oDisplayRequest.requestActive();

Expand All @@ -219,15 +222,21 @@
cameraPreview.style.transform = "scale(-1, 1)";
}

var previewUrl = URL.createObjectURL(oMediaCapture);
previewVidTag.src = previewUrl;
previewVidTag.play();

previewVidTag.addEventListener("playing", function () {
isPreviewing = true;
updateCaptureControls();
setPreviewRotationAsync();
});
// Apply desired stream properties
return mediaCapture.videoDeviceController.setMediaStreamPropertiesAsync(streamType, encodingProperties)
.then(function () {
// Recreate pipeline and restart the preview
previewVidTag = document.getElementById("cameraPreview");
var previewUrl = URL.createObjectURL(mediaCapture);
previewVidTag.src = previewUrl;
previewVidTag.play();

previewVidTag.addEventListener("playing", function () {
isPreviewing = true;
updateCaptureControls();
setPreviewRotationAsync();
});
});
}

/// <summary>
Expand Down