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chrome.cast.js
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var EventEmitter = require('acidhax.cordova.chromecast.EventEmitter');
var chrome = {};
chrome.cast = {
/**
* The API version.
* @type {Array}
*/
VERSION: [1, 1],
/**
* Describes availability of a Cast receiver.
* AVAILABLE: At least one receiver is available that is compatible with the session request.
* UNAVAILABLE: No receivers are available.
* @type {Object}
*/
ReceiverAvailability: { AVAILABLE: "available", UNAVAILABLE: "unavailable" },
/**
* TODO: Update when the official API docs are finished
* https://developers.google.com/cast/docs/reference/chrome/chrome.cast.ReceiverType
* CAST:
* DIAL:
* CUSTOM:
* @type {Object}
*/
ReceiverType: { CAST: "cast", DIAL: "dial", CUSTOM: "custom" },
/**
* Describes a sender application platform.
* CHROME:
* IOS:
* ANDROID:
* @type {Object}
*/
SenderPlatform: { CHROME: "chrome", IOS: "ios", ANDROID: "android" },
/**
* Auto-join policy determines when the SDK will automatically connect a sender application to an existing session after API initialization.
* ORIGIN_SCOPED: Automatically connects when the session was started with the same appId and the same page origin (regardless of tab).
* PAGE_SCOPED: No automatic connection.
* TAB_AND_ORIGIN_SCOPED: Automatically connects when the session was started with the same appId, in the same tab and page origin.
* @type {Object}
*/
AutoJoinPolicy: { TAB_AND_ORIGIN_SCOPED: "tab_and_origin_scoped", ORIGIN_SCOPED: "origin_scoped", PAGE_SCOPED: "page_scoped" },
/**
* Capabilities that are supported by the receiver device.
* AUDIO_IN: The receiver supports audio input (microphone).
* AUDIO_OUT: The receiver supports audio output.
* VIDEO_IN: The receiver supports video input (camera).
* VIDEO_OUT: The receiver supports video output.
* @type {Object}
*/
Capability: { VIDEO_OUT: "video_out", AUDIO_OUT: "audio_out", VIDEO_IN: "video_in", AUDIO_IN: "audio_in" },
/**
* Default action policy determines when the SDK will automatically create a session after initializing the API. This also controls the default action for the tab in the extension popup.
* CAST_THIS_TAB: No automatic launch is done after initializing the API, even if the tab is being cast.
* CREATE_SESSION: If the tab containing the app is being casted when the API initializes, the SDK stops tab casting and automatically launches the app.
* @type {Object}
*/
DefaultActionPolicy: { CREATE_SESSION: "create_session", CAST_THIS_TAB: "cast_this_tab" },
/**
* Errors that may be returned by the SDK.
* API_NOT_INITIALIZED: The API is not initialized.
* CANCEL: The operation was canceled by the user.
* CHANNEL_ERROR: A channel to the receiver is not available.
* EXTENSION_MISSING: The Cast extension is not available.
* EXTENSION_NOT_COMPATIBLE: The API script is not compatible with the installed Cast extension.
* INVALID_PARAMETER: The parameters to the operation were not valid.
* LOAD_MEDIA_FAILED: Load media failed.
* RECEIVER_UNAVAILABLE: No receiver was compatible with the session request.
* SESSION_ERROR: A session could not be created, or a session was invalid.
* TIMEOUT: The operation timed out.
* @type {Object}
*/
ErrorCode: {
API_NOT_INITIALIZED: "api_not_initialized",
CANCEL: "cancel",
CHANNEL_ERROR: "channel_error",
EXTENSION_MISSING: "extension_missing",
EXTENSION_NOT_COMPATIBLE: "extension_not_compatible",
INVALID_PARAMETER: "invalid_parameter",
LOAD_MEDIA_FAILED: "load_media_failed",
RECEIVER_UNAVAILABLE: "receiver_unavailable",
SESSION_ERROR: "session_error",
TIMEOUT: "timeout",
UNKNOWN: "unknown",
NOT_IMPLEMENTED: "not_implemented"
},
/**
* TODO: Update when the official API docs are finished
* https://developers.google.com/cast/docs/reference/chrome/chrome.cast.timeout
* @type {Object}
*/
timeout: {
requestSession: 10000,
sendCustomMessage: 3000,
setReceiverVolume: 3000,
stopSession: 3000
},
/**
* Flag for clients to check whether the API is loaded.
* @type {Boolean}
*/
isAvailable: false,
// CLASSES CLASSES CLASSES CLASSES CLASSES CLASSES CLASSES
/**
* [ApiConfig description]
* @param {chrome.cast.SessionRequest} sessionRequest Describes the session to launch or the session to connect.
* @param {function} sessionListener Listener invoked when a session is created or connected by the SDK.
* @param {function} receiverListener Function invoked when the availability of a Cast receiver that supports the application in sessionRequest is known or changes.
* @param {chrome.cast.AutoJoinPolicy} autoJoinPolicy Determines whether the SDK will automatically connect to a running session after initialization.
* @param {chrome.cast.DefaultActionPolicy} defaultActionPolicy Requests whether the application should be launched on API initialization when the tab is already being cast.
*/
ApiConfig: function (sessionRequest, sessionListener, receiverListener, autoJoinPolicy, defaultActionPolicy) {
this.sessionRequest = sessionRequest;
this.sessionListener = sessionListener;
this.receiverListener = receiverListener;
this.autoJoinPolicy = autoJoinPolicy || chrome.cast.AutoJoinPolicy.TAB_AND_ORIGIN_SCOPED;
this.defaultActionPolicy = defaultActionPolicy || chrome.cast.DefaultActionPolicy.CREATE_SESSION;
},
/**
* Describes the receiver running an application. Normally, these objects should not be created by the client.
* @param {string} label An identifier for the receiver that is unique to the browser profile and the origin of the API client.
* @param {string} friendlyName The user given name for the receiver.
* @param {chrome.cast.Capability[]} capabilities The capabilities of the receiver, for example audio and video.
* @param {chrome.cast.Volume} volume The current volume of the receiver.
*/
Receiver: function (label, friendlyName, capabilities, volume) {
this.label = label;
this.friendlyName = friendlyName;
this.capabilities = capabilities || [];
this.volume = volume || null;
this.receiverType = chrome.cast.ReceiverType.CAST;
this.isActiveInput = null;
},
/**
* TODO: Update when the official API docs are finished
* https://developers.google.com/cast/docs/reference/chrome/chrome.cast.DialRequest
* @param {[type]} appName [description]
* @param {[type]} launchParameter [description]
*/
DialRequest: function (appName, launchParameter) {
this.appName = appName;
this.launchParameter = launchParameter;
},
/**
* A request to start or connect to a session.
* @param {string} appId The receiver application id.
* @param {chrome.cast.Capability[]} capabilities Capabilities required of the receiver device.
* @property {chrome.cast.DialRequest} dialRequest If given, the SDK will also discover DIAL devices that support the DIAL application given in the dialRequest.
*/
SessionRequest: function (appId, capabilities) {
this.appId = appId;
this.capabilities = capabilities || [chrome.cast.Capability.VIDEO_OUT, chrome.cast.Capability.AUDIO_OUT];
this.dialRequest = null;
},
/**
* Describes an error returned by the API. Normally, these objects should not be created by the client.
* @param {chrome.cast.ErrorCode} code The error code.
* @param {string} description Human readable description of the error.
* @param {Object} details Details specific to the error.
*/
Error: function (code, description, details) {
this.code = code;
this.description = description || null;
this.details = details || null;
},
/**
* An image that describes a receiver application or media item. This could be an application icon, cover art, or a thumbnail.
* @param {string} url The URL to the image.
* @property {number} height The height of the image
* @property {number} width The width of the image
*/
Image: function (url) {
this.url = url;
this.width = this.height = null;
},
/**
* Describes a sender application. Normally, these objects should not be created by the client.
* @param {chrome.cast.SenderPlatform} platform The supported platform.
* @property {string} packageId The identifier or URL for the application in the respective platform's app store.
* @property {string} url URL or intent to launch the application.
*/
SenderApplication: function (platform) {
this.platform = platform;
this.packageId = this.url = null;
},
/**
* The volume of a device or media stream.
* @param {number} level The current volume level as a value between 0.0 and 1.0.
* @param {boolean} muted Whether the receiver is muted, independent of the volume level.
*/
Volume: function (level, muted) {
this.level = level || null;
this.muted = null;
if (muted === true || muted === false) {
this.muted = muted;
}
},
// media package
media: {
/**
* The default receiver app.
*/
DEFAULT_MEDIA_RECEIVER_APP_ID: 'CC1AD845',
/**
* Possible states of the media player.
* BUFFERING: Player is in PLAY mode but not actively playing content. currentTime will not change.
* IDLE: No media is loaded into the player.
* PAUSED: The media is not playing.
* PLAYING: The media is playing.
* @type {Object}
*/
PlayerState: { IDLE: "IDLE", PLAYING: "PLAYING", PAUSED: "PAUSED", BUFFERING: "BUFFERING" },
/**
* States of the media player after resuming.
* PLAYBACK_PAUSE: Force media to pause.
* PLAYBACK_START: Force media to start.
* @type {Object}
*/
ResumeState: { PLAYBACK_START: "PLAYBACK_START", PLAYBACK_PAUSE: "PLAYBACK_PAUSE" },
/**
* Possible media commands supported by the receiver application.
* @type {Object}
*/
MediaCommand: { PAUSE: "pause", SEEK: "seek", STREAM_VOLUME: "stream_volume", STREAM_MUTE: "stream_mute" },
/**
* Possible types of media metadata.
* GENERIC: Generic template suitable for most media types. Used by chrome.cast.media.GenericMediaMetadata.
* MOVIE: A full length movie. Used by chrome.cast.media.MovieMediaMetadata.
* MUSIC_TRACK: A music track. Used by chrome.cast.media.MusicTrackMediaMetadata.
* PHOTO: Photo. Used by chrome.cast.media.PhotoMediaMetadata.
* TV_SHOW: An episode of a TV series. Used by chrome.cast.media.TvShowMediaMetadata.
* @type {Object}
*/
MetadataType: { GENERIC: 0, TV_SHOW: 1, MOVIE: 2, MUSIC_TRACK: 3, PHOTO: 4 },
/**
* Possible media stream types.
* BUFFERED: Stored media streamed from an existing data store.
* LIVE: Live media generated on the fly.
* OTHER: None of the above.
* @type {Object}
*/
StreamType: { BUFFERED: 'buffered', LIVE: 'live', OTHER: 'other' },
/**
* TODO: Update when the official API docs are finished
* https://developers.google.com/cast/docs/reference/chrome/chrome.cast.media.timeout
* @type {Object}
*/
timeout: {
load: 0,
ob: 0,
pause: 0,
play: 0,
seek: 0,
setVolume: 0,
stop: 0
},
// CLASSES CLASSES CLASSES CLASSES CLASSES CLASSES CLASSES
/**
* A request to load new media into the player.
* @param {chrome.cast.media.MediaInfo} media Media description.
* @property {boolean} autoplay Whether the media will automatically play.
* @property {number} currentTime Seconds from the beginning of the media to start playback.
* @property {Object} customData Custom data for the receiver application.
*/
LoadRequest: function (media) {
this.type = 'LOAD';
this.sessionId = this.requestId = this.customData = this.currentTime = null;
this.media = media;
this.autoplay = !0;
},
/**
* A request to play the currently paused media.
* @property {Object} customData Custom data for the receiver application.
*/
PlayRequest: function () {
this.customData = null;
},
/**
* A request to seek the current media.
* @property {number} currentTime The new current time for the media, in seconds after the start of the media.
* @property {chrome.cast.media.ResumeState} resumeState The desired media player state after the seek is complete.
* @property {Object} customData Custom data for the receiver application.
*/
SeekRequest: function () {
this.customData = this.resumeState = this.currentTime = null;
},
/**
* A request to set the stream volume of the playing media.
* @param {chrome.cast.Volume} volume The new volume of the stream.
* @property {Object} customData Custom data for the receiver application.
*/
VolumeRequest: function (volume) {
this.volume = volume;
this.customData = null;
},
/**
* A request to stop the media player.
* @property {Object} customData Custom data for the receiver application.
*/
StopRequest: function () {
this.customData = null;
},
/**
* A request to pause the currently playing media.
* @property {Object} customData Custom data for the receiver application.
*/
PauseRequest: function () {
this.customData = null;
},
/**
* A generic media description.
* @property {chrome.cast.Image[]} images Content images.
* @property {string} releaseDate ISO 8601 date and/or time when the content was released, e.g.
* @property {number} releaseYear Integer year when the content was released.
* @property {string} subtitle Content subtitle.
* @property {string} title Content title.
* @property {chrome.cast.media.MetadataType} type The type of metadata.
*/
GenericMediaMetadata: function () {
this.metadataType = this.type = chrome.cast.media.MetadataType.GENERIC;
this.releaseDate = this.releaseYear = this.images = this.subtitle = this.title = null;
},
/**
* A movie media description.
* @property {chrome.cast.Image[]} images Content images.
* @property {string} releaseDate ISO 8601 date and/or time when the content was released, e.g.
* @property {number} releaseYear Integer year when the content was released.
* @property {string} studio Movie studio
* @property {string} subtitle Content subtitle.
* @property {string} title Content title.
* @property {chrome.cast.media.MetadataType} type The type of metadata.
*/
MovieMediaMetadata: function () {
this.metadataType = this.type = chrome.cast.media.MetadataType.MOVIE;
this.releaseDate = this.releaseYear = this.images = this.subtitle = this.studio = this.title = null;
},
/**
* A music track media description.
* @property {string} albumArtist Album artist name.
* @property {string} albumName Album name.
* @property {string} artist Track artist name.
* @property {string} artistName Track artist name.
* @property {string} composer Track composer name.
* @property {number} discNumber Disc number.
* @property {chrome.cast.Image[]} images Content images.
* @property {string} releaseDate ISO 8601 date when the track was released, e.g.
* @property {number} releaseYear Integer year when the album was released.
* @property {string} songName Track name.
* @property {string} title Track title.
* @property {number} trackNumber Track number in album.
* @property {chrome.cast.media.MetadataType} type The type of metadata.
*/
MusicTrackMediaMetadata: function () {
this.metadataType = this.type = chrome.cast.media.MetadataType.MUSIC_TRACK;
this.releaseDate = this.releaseYear = this.images = this.discNumber = this.trackNumber = this.artistName = this.songName = this.composer = this.artist = this.albumArtist = this.title = this.albumName = null;
},
/**
* A photo media description.
* @property {string} artist Name of the photographer.
* @property {string} creationDateTime ISO 8601 date and time the photo was taken, e.g.
* @property {number} height Photo height, in pixels.
* @property {chrome.cast.Image[]} images Images associated with the content.
* @property {number} latitude Latitude.
* @property {string} location Location where the photo was taken.
* @property {number} longitude Longitude.
* @property {string} title Photo title.
* @property {chrome.cast.media.MetadataType} type The type of metadata.
* @property {number} width Photo width, in pixels.
*/
PhotoMediaMetadata: function () {
this.metadataType = this.type = chrome.cast.media.MetadataType.PHOTO;
this.creationDateTime = this.height = this.width = this.longitude = this.latitude = this.images = this.location = this.artist = this.title = null;
},
/**
* [TvShowMediaMetadata description]
* @property {number} episode TV episode number.
* @property {number} episodeNumber TV episode number.
* @property {string} episodeTitle TV episode title.
* @property {chrome.cast.Image[]} images Content images.
* @property {string} originalAirdate ISO 8601 date when the episode originally aired, e.g.
* @property {number} releaseYear Integer year when the content was released.
* @property {number} season TV episode season.
* @property {number} seasonNumber TV episode season.
* @property {string} seriesTitle TV series title.
* @property {string} title TV episode title.
* @property {chrome.cast.media.MetadataType} type The type of metadata.
*/
TvShowMediaMetadata: function () {
this.metadataType = this.type = chrome.cast.media.MetadataType.TV_SHOW;
this.originalAirdate = this.releaseYear = this.images = this.episode = this.episodeNumber = this.season = this.seasonNumber = this.episodeTitle = this.title = this.seriesTitle = null;
},
/**
* Describes a media item.
* @param {string} contentId Identifies the content.
* @param {string} contentType MIME content type of the media.
* @property {Object} customData Custom data set by the receiver application.
* @property {number} duration Duration of the content, in seconds.
* @property {any type} metadata Describes the media content.
* @property {chrome.cast.media.StreamType} streamType The type of media stream.
*/
MediaInfo: function (contentId, contentType) {
this.contentId = contentId;
this.streamType = chrome.cast.media.StreamType.BUFFERED;
this.contentType = contentType;
this.customData = this.duration = this.metadata = null;
}
}
};
var _sessionRequest = null;
var _autoJoinPolicy = null;
var _defaultActionPolicy = null;
var _receiverListener = null;
var _sessionListener = null;
var _sessions = {};
var _currentMedia = null;
var _routeListEl = document.createElement('ul');
_routeListEl.classList.add('route-list');
var _routeList = {};
var _routeRefreshInterval = null;
var _receiverAvailable = false;
/**
* Initializes the API. Note that either successCallback and errorCallback will be invoked once the API has finished initialization.
* The sessionListener and receiverListener may be invoked at any time afterwards, and possibly more than once.
* @param {chrome.cast.ApiConfig} apiConfig The object with parameters to initialize the API. Must not be null.
* @param {function} successCallback
* @param {function} errorCallback
*/
chrome.cast.initialize = function (apiConfig, successCallback, errorCallback) {
if (!chrome.cast.isAvailable) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
_sessionListener = apiConfig.sessionListener;
_autoJoinPolicy = apiConfig.autoJoinPolicy;
_defaultActionPolicy = apiConfig.defaultActionPolicy;
_receiverListener = apiConfig.receiverListener;
_sessionRequest = apiConfig.sessionRequest;
execute('initialize', _sessionRequest.appId, _autoJoinPolicy, _defaultActionPolicy, function(err) {
if (!err) {
successCallback();
clearInterval(_routeRefreshInterval);
_routeRefreshInterval = setInterval(function() {
execute('emitAllRoutes');
}, 15000);
} else {
handleError(err, errorCallback);
}
});
};
/**
* Requests that a receiver application session be created or joined.
* By default, the SessionRequest passed to the API at initialization time is used;
* this may be overridden by passing a different session request in opt_sessionRequest.
* @param {function} successCallback
* @param {function} errorCallback The possible errors are TIMEOUT, INVALID_PARAMETER, API_NOT_INITIALIZED, CANCEL, CHANNEL_ERROR, SESSION_ERROR, RECEIVER_UNAVAILABLE, and EXTENSION_MISSING. Note that the timeout timer starts after users select a receiver. Selecting a receiver requires user's action, which has no timeout.
* @param {chrome.cast.SessionRequest} opt_sessionRequest
*/
chrome.cast.requestSession = function (successCallback, errorCallback, opt_sessionRequest) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
if (_receiverAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.RECEIVER_UNAVAILABLE, 'No receiver was compatible with the session request.', {}));
return;
}
execute('requestSession', function(err, obj) {
if (!err) {
var sessionId = obj.sessionId;
var appId = obj.appId;
var displayName = obj.displayName;
var appImages = obj.appImages || [];
var receiver = new chrome.cast.Receiver(obj.receiver.label, obj.receiver.friendlyName, obj.receiver.capabilities || [], obj.volume || null);
var session = _sessions[sessionId] = new chrome.cast.Session(sessionId, appId, displayName, appImages, receiver);
if (obj.media && obj.media.sessionId)
{
_currentMedia = new chrome.cast.media.Media(sessionId, obj.media.mediaSessionId);
_currentMedia.currentTime = obj.media.currentTime;
_currentMedia.playerState = obj.media.playerState;
_currentMedia.media = obj.media.media;
session.media[0] = _currentMedia;
}
successCallback(session);
_sessionListener(session); /*Fix - Already has a sessionListener*/
} else {
handleError(err, errorCallback);
}
});
};
/**
* Sets custom receiver list
* @param {chrome.cast.Receiver[]} receivers The new list. Must not be null.
* @param {function} successCallback
* @param {function} errorCallback
*/
chrome.cast.setCustomReceivers = function (receivers, successCallback, errorCallback) {
// TODO: Implement
};
/** SESSION SESSION SESSION SESSION SESSION SESSION SESSION SESSION **/
/**
* Describes the state of a currently running Cast application. Normally, these objects should not be created by the client.
* @param {string} sessionId Uniquely identifies this instance of the receiver application.
* @param {string} appId The identifer of the Cast application.
* @param {string} displayName The human-readable name of the Cast application, for example, "YouTube".
* @param {chrome.cast.Image[]} appImages Array of images available describing the application.
* @param {chrome.cast.Receiver} receiver The receiver that is running the application.
*
* @property {Object} customData Custom data set by the receiver application.
* @property {chrome.cast.media.Media} media The media that belong to this Cast session, including those loaded by other senders.
* @property {Object[]} namespaces A list of the namespaces supported by the receiver application.
* @property {chrome.cast.SenderApplication} senderApps The sender applications supported by the receiver application.
* @property {string} statusText Descriptive text for the current application content, for example “My Wedding Slideshow”.
*/
chrome.cast.Session = function(sessionId, appId, displayName, appImages, receiver) {
EventEmitter.call(this);
this.sessionId = sessionId;
this.appId = appId;
this.displayName = displayName;
this.appImages = appImages || [];
this.receiver = receiver;
this.media = [];
};
chrome.cast.Session.prototype = Object.create(EventEmitter.prototype);
/**
* Sets the receiver volume.
* @param {number} newLevel The new volume level between 0.0 and 1.0.
* @param {function} successCallback
* @param {function} errorCallback The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.Session.prototype.setReceiverVolumeLevel = function (newLevel, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('setReceiverVolumeLevel', newLevel, function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
};
/**
* Sets the receiver volume.
* @param {boolean} muted The new muted status.
* @param {function} successCallback
* @param {function} errorCallback The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.Session.prototype.setReceiverMuted = function (muted, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('setReceiverMuted', muted, function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
};
/**
* Stops the running receiver application associated with the session.
* @param {function} successCallback
* @param {function} errorCallback The possible errors are TIMEOUT, API_NOT_INITIALIZED, CHANNEL_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.Session.prototype.stop = function (successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('sessionStop', function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
};
/**
* Leaves the current session.
* @param {function} successCallback
* @param {function} errorCallback The possible errors are TIMEOUT, API_NOT_INITIALIZED, CHANNEL_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.Session.prototype.leave = function (successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('sessionLeave', function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
};
/**
* Sends a message to the receiver application on the given namespace.
* The successCallback is invoked when the message has been submitted to the messaging channel.
* Delivery to the receiver application is best effort and not guaranteed.
* @param {string} namespace
* @param {Object or string} message Must not be null
* @param {[type]} successCallback Invoked when the message has been sent. Must not be null.
* @param {[type]} errorCallback Invoked on error. The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, SESSION_ERROR, and EXTENSION_MISSING
*/
chrome.cast.Session.prototype.sendMessage = function (namespace, message, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
if (typeof message === 'object') {
message = JSON.stringify(message);
}
execute('sendMessage', namespace, message, function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
};
/**
* Request to load media. Must not be null.
* @param {chrome.cast.media.LoadRequest} loadRequest Request to load media. Must not be null.
* @param {function} successCallback Invoked with the loaded Media on success.
* @param {function} errorCallback Invoked on error. The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, SESSION_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.Session.prototype.loadMedia = function (loadRequest, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
var self = this;
var mediaInfo = loadRequest.media;
execute('loadMedia', mediaInfo.contentId, mediaInfo.contentType, mediaInfo.duration || 0.0, mediaInfo.streamType, loadRequest.autoplay || false, loadRequest.currentTime || 0, mediaInfo.metadata, function(err, obj) {
if (!err) {
_currentMedia = new chrome.cast.media.Media(self.sessionId, obj.mediaSessionId);
_currentMedia.media = mediaInfo;
_currentMedia.media.duration = obj.media.duration;
_currentMedia.currentTime = obj.currentTime /* ??? */
// TODO: Fill in the rest of the media properties
successCallback(_currentMedia);
} else {
handleError(err, errorCallback);
}
});
};
/**
* Adds a listener that is invoked when the status of the Session has changed.
* Changes to the following properties will trigger the listener: statusText, namespaces, customData, and the volume of the receiver.
* The callback will be invoked with 'true' (isAlive) parameter.
* When this session is ended, the callback will be invoked with 'false' (isAlive);
* @param {function} listener The listener to add.
*/
chrome.cast.Session.prototype.addUpdateListener = function (listener) {
this.on('_sessionUpdated', listener);
};
/**
* Removes a previously added listener for this Session.
* @param {function} listener The listener to remove.
*/
chrome.cast.Session.prototype.removeUpdateListener = function (listener) {
this.removeListener('_sessionUpdated', listener);
};
/**
* Adds a listener that is invoked when a message is received from the receiver application.
* The listener is invoked with the the namespace as the first argument and the message as the second argument.
* @param {string} namespace The namespace to listen on.
* @param {function} listener The listener to add.
*/
chrome.cast.Session.prototype.addMessageListener = function (namespace, listener) {
execute('addMessageListener', namespace);
this.on('message:' + namespace, listener);
};
/**
* Removes a previously added listener for messages.
* @param {string} namespace The namespace that is listened to.
* @param {function} listener The listener to remove.
*/
chrome.cast.Session.prototype.removeMessageListener = function (namespace, listener) {
this.removeListener('message:' + namespace, listener);
};
/**
* Adds a listener that is invoked when a media session is created by another sender.
* @param {function} listener The listener to add.
*/
chrome.cast.Session.prototype.addMediaListener = function (listener) {
this.on('_mediaListener', listener);
};
/**
* Removes a listener that was previously added with addMediaListener.
* @param {function} listener The listener to remove.
*/
chrome.cast.Session.prototype.removeMediaListener = function (listener) {
this.removeListener('_mediaListener', listener);
};
chrome.cast.Session.prototype._update = function(isAlive, obj) {
this.appId = obj.appId;
this.appImages = obj.appImages;
this.displayName = obj.displayName;
if (obj.receiver) {
if (!this.receiver) {
this.receiver = new chrome.cast.Receiver(null, null, null, null);
}
this.receiver.friendlyName = obj.receiver.friendlyName;
this.receiver.label = obj.receiver.label;
if (obj.receiver.volume) {
this.receiver.volume = new chrome.cast.Volume(obj.receiver.volume.level, obj.receiver.volume.muted);
}
}
this.emit('_sessionUpdated', isAlive);
};
/* MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA MEDIA */
/**
* Represents a media item that has been loaded into the receiver application.
* @param {string} sessionId Identifies the session that is hosting the media.
* @param {number} mediaSessionId Identifies the media item.
*
* @property {Object} customData Custom data set by the receiver application.
* @property {number} currentTime The current playback position in seconds since the start of the media.
* @property {chrome.cast.media.MediaInfo} media Media description.
* @property {number} playbackRate The playback rate.
* @property {chrome.cast.media.PlayerState} playerState The player state.
* @property {chrome.cast.media.MediaCommand[]} supportedMediaCommands The media commands supported by the media player.
* @property {chrome.cast.Volume} volume The media stream volume.
* @property {string} idleReason Reason for idling
*/
chrome.cast.media.Media = function(sessionId, mediaSessionId) {
EventEmitter.call(this);
this.sessionId = sessionId;
this.mediaSessionId = mediaSessionId;
this.currentTime = 0;
this.playbackRate = 1;
this.playerState = chrome.cast.media.PlayerState.BUFFERING;
this.supportedMediaCommands = [
chrome.cast.media.MediaCommand.PAUSE,
chrome.cast.media.MediaCommand.SEEK,
chrome.cast.media.MediaCommand.STREAM_VOLUME,
chrome.cast.media.MediaCommand.STREAM_MUTE
];
this.volume = new chrome.cast.Volume(1, false);
this._lastUpdatedTime = Date.now();
this.media = {};
};
chrome.cast.media.Media.prototype = Object.create(EventEmitter.prototype);
/**
* Plays the media item.
* @param {chrome.cast.media.PlayRequest} playRequest The optional media play request.
* @param {function} successCallback Invoked on success.
* @param {function} errorCallback Invoked on error. The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, SESSION_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.media.Media.prototype.play = function (playRequest, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('mediaPlay', function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
};
/**
* Pauses the media item.
* @param {chrome.cast.media.PauseRequest} pauseRequest The optional media pause request.
* @param {function} successCallback Invoked on success.
* @param {function} errorCallback Invoked on error. The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, SESSION_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.media.Media.prototype.pause = function (pauseRequest, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('mediaPause', function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
};
/**
* Seeks the media item.
* @param {chrome.cast.media.SeekRequest} seekRequest The media seek request. Must not be null.
* @param {function} successCallback Invoked on success.
* @param {function} errorCallback Invoked on error. The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, SESSION_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.media.Media.prototype.seek = function (seekRequest, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('mediaSeek', seekRequest.currentTime, seekRequest.resumeState || "", function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
})
};
/**
* Stops the media player.
* @param {chrome.cast.media.StopRequest} stopRequest The media stop request.
* @param {function} successCallback Invoked on success.
* @param {function} errorCallback Invoked on error. The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, SESSION_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.media.Media.prototype.stop = function (stopRequest, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
execute('mediaStop', function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
})
};
/**
* Sets the media stream volume. At least one of volumeRequest.level or volumeRequest.muted must be set. Changing the mute state does not affect the volume level, and vice versa.
* @param {chrome.cast.media.VolumeRequest} volumeRequest The set volume request. Must not be null.
* @param {function} successCallback Invoked on success.
* @param {function} errorCallback Invoked on error. The possible errors are TIMEOUT, API_NOT_INITIALIZED, INVALID_PARAMETER, CHANNEL_ERROR, SESSION_ERROR, and EXTENSION_MISSING.
*/
chrome.cast.media.Media.prototype.setVolume = function (volumeRequest, successCallback, errorCallback) {
if (chrome.cast.isAvailable === false) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.API_NOT_INITIALIZED), 'The API is not initialized.', {});
return;
}
var args = [];
if (volumeRequest.volume.level !== null) {
args.push('setMediaVolume');
args.push(volumeRequest.volume.level);
} else if (volumeRequest.volume.muted !== null) {
args.push('setMediaMuted');
args.push(volumeRequest.volume.muted);
}
if (args.length < 2) {
errorCallback(new chrome.cast.Error(chrome.cast.ErrorCode.INVALID_PARAMETER), 'Invalid request.', {});
} else {
args.push(function(err) {
if (!err) {
successCallback && successCallback();
} else {
handleError(err, errorCallback);
}
});
execute.apply(null, args);
}
};
/**
* Determines whether the media player supports the given media command.
* @param {chrome.cast.media.MediaCommand} command The command to query. Must not be null.
* @returns {boolean} True if the player supports the command.
*/
chrome.cast.media.Media.prototype.supportsCommand = function (command) {
return this.supportsCommands.indexOf(command) > -1;
};
/**
* Estimates the current playback position.
* @returns {number} number An estimate of the current playback position in seconds since the start of the media.
*/
chrome.cast.media.Media.prototype.getEstimatedTime = function () {
if (this.playerState === chrome.cast.media.PlayerState.PLAYING) {
var elapsed = (Date.now() - this._lastUpdatedTime) / 1000;
var estimatedTime = this.currentTime + elapsed;
return estimatedTime;
} else {
return this.currentTime;
}
};
/**
* Adds a listener that is invoked when the status of the media has changed.
* Changes to the following properties will trigger the listener: currentTime, volume, metadata, playbackRate, playerState, customData.
* @param {function} listener The listener to add. The parameter indicates whether the Media object is still alive.
*/
chrome.cast.media.Media.prototype.addUpdateListener = function (listener) {
this.on('_mediaUpdated', listener);
};
/**
* Removes a previously added listener for this Media.
* @param {function} listener The listener to remove.