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// -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
this.EXPORTED_SYMBOLS = ["CastingApps"];
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/SimpleServiceDiscovery.jsm");
var CastingApps = {
_sendEventToVideo: function (element, data) {
let event = element.ownerDocument.createEvent("CustomEvent");
event.initCustomEvent("media-videoCasting", false, true, JSON.stringify(data));
element.dispatchEvent(event);
},
makeURI: function (url, charset, baseURI) {
return Services.io.newURI(url, charset, baseURI);
},
getVideo: function (element) {
if (!element) {
return null;
}
let extensions = SimpleServiceDiscovery.getSupportedExtensions();
let types = SimpleServiceDiscovery.getSupportedMimeTypes();
// Grab the poster attribute from the <video>
let posterURL = element.poster;
// First, look to see if the <video> has a src attribute
let sourceURL = element.src;
// If empty, try the currentSrc
if (!sourceURL) {
sourceURL = element.currentSrc;
}
if (sourceURL) {
// Use the file extension to guess the mime type
let sourceURI = this.makeURI(sourceURL, null, this.makeURI(element.baseURI));
if (this.allowableExtension(sourceURI, extensions)) {
return { element: element, source: sourceURI.spec, poster: posterURL, sourceURI: sourceURI};
}
}
// Next, look to see if there is a <source> child element that meets
// our needs
let sourceNodes = element.getElementsByTagName("source");
for (let sourceNode of sourceNodes) {
let sourceURI = this.makeURI(sourceNode.src, null, this.makeURI(sourceNode.baseURI));
// Using the type attribute is our ideal way to guess the mime type. Otherwise,
// fallback to using the file extension to guess the mime type
if (this.allowableMimeType(sourceNode.type, types) || this.allowableExtension(sourceURI, extensions)) {
return { element: element, source: sourceURI.spec, poster: posterURL, sourceURI: sourceURI, type: sourceNode.type };
}
}
return null;
},
sendVideoToService: function (videoElement, service) {
if (!service)
return;
let video = this.getVideo(videoElement);
if (!video) {
return;
}
// Make sure we have a player app for the given service
let app = SimpleServiceDiscovery.findAppForService(service);
if (!app)
return;
video.title = videoElement.ownerGlobal.top.document.title;
if (video.element) {
// If the video is currently playing on the device, pause it
if (!video.element.paused) {
video.element.pause();
}
}
app.stop(() => {
app.start(started => {
if (!started) {
Cu.reportError("CastingApps: Unable to start app");
return;
}
app.remoteMedia(remoteMedia => {
if (!remoteMedia) {
Cu.reportError("CastingApps: Failed to create remotemedia");
return;
}
this.session = {
service: service,
app: app,
remoteMedia: remoteMedia,
data: {
title: video.title,
source: video.source,
poster: video.poster
},
videoRef: Cu.getWeakReference(video.element)
};
}, this);
});
});
},
getServicesForVideo: function (videoElement) {
let video = this.getVideo(videoElement);
if (!video) {
return {};
}
let filteredServices = SimpleServiceDiscovery.services.filter(service => {
return this.allowableExtension(video.sourceURI, service.extensions) ||
this.allowableMimeType(video.type, service.types);
});
return filteredServices;
},
getServicesForMirroring: function () {
return SimpleServiceDiscovery.services.filter(service => service.mirror);
},
// RemoteMedia callback API methods
onRemoteMediaStart: function (remoteMedia) {
if (!this.session) {
return;
}
remoteMedia.load(this.session.data);
let video = this.session.videoRef.get();
if (video) {
this._sendEventToVideo(video, { active: true });
}
},
onRemoteMediaStop: function (remoteMedia) {
},
onRemoteMediaStatus: function (remoteMedia) {
},
allowableExtension: function (uri, extensions) {
return (uri instanceof Ci.nsIURL) && extensions.indexOf(uri.fileExtension) != -1;
},
allowableMimeType: function (type, types) {
return types.indexOf(type) != -1;
}
};
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