gecko-dev/dom/tv/TVSimulatorService.js

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JavaScript

/* 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";
function debug(aMsg) {
//dump("[TVSimulatorService] " + aMsg + "\n");
}
const Cc = Components.classes;
const Cu = Components.utils;
const Ci = Components.interfaces;
const Cr = Components.returnCode;
Cu.importGlobalProperties(["File"]);
Cu.import("resource://gre/modules/Services.jsm");
const TV_SIMULATOR_DUMMY_DIRECTORY = "dummy";
const TV_SIMULATOR_DUMMY_FILE = "settings.json";
// See http://seanyhlin.github.io/TV-Manager-API/#idl-def-TVSourceType
const TV_SOURCE_TYPES = ["dvb-t","dvb-t2","dvb-c","dvb-c2","dvb-s",
"dvb-s2","dvb-h","dvb-sh","atsc","atsc-m/h",
"isdb-t","isdb-tb","isdb-s","isdb-c","1seg",
"dtmb","cmmb","t-dmb","s-dmb"];
function containInvalidSourceType(aElement, aIndex, aArray) {
return !TV_SOURCE_TYPES.includes(aElement);
}
// See http://seanyhlin.github.io/TV-Manager-API/#idl-def-TVChannelType
const TV_CHANNEL_TYPES = ["tv","radio","data"];
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
function TVSimulatorService() {
this._internalTuners = null;
this._scanCompleteTimer = null;
this._scanningWrapTunerData = null;
this._init();
}
TVSimulatorService.prototype = {
classID: Components.ID("{94b065ad-d45a-436a-b394-6dabc3cf110f}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsITVSimulatorService,
Ci.nsITVService,
Ci.nsITimerCallback]),
_init: function TVSimInit() {
if (this._internalTuners) {
return;
}
// I try to load the testing mock data if related preference are already set.
// Otherwise, use to the simulation data from prefences.
// See /dom/tv/test/mochitest/head.js for more details.
let settingStr = "";
try {
settingStr = Services.prefs.getCharPref("dom.testing.tv_mock_data");
} catch(e) {
try {
settingStr = this._getDummyData();
} catch(e) {
debug("TV Simulator service failed to load simulation data: " + e);
return;
}
}
let settingsObj;
try {
/*
*
* Setting JSON file format:
*
* Note: This setting JSON is not allow empty array.
* If set the empty array, _init() will fail.
* e.g.
* - "tuners": []
* - "channels":[]
* Format:
* {
* "tuners": [{
* "id": "The ID of the tuner",
* "supportedType": ["The array of source type to be used."],
* "sources": [{
* "type": "The source type to be used",
* "channels" : [{
* "networkId": "The ID of the channel network",
* "transportStreamId": "The ID of channel transport stream",
* "serviceId": "The ID of channel service",
* "type": "The type of channel",
* "name": "The channel name",
* "number" : The LCN (Logical Channel Number) of the channel,
* "isEmergency" : Whether this channel is emergency status,
* "isFree": Whether this channel is free or not,
* "videoFilePath": "The path of the fake video file",
* "programs":[{
* "eventId": "The ID of this program event",
* "title" : "This program's title",
* "startTime": "The start time of this program",
* "duration": "The duration of this program",
* "description": "The description of this program",
* "rating": "The rating of this program",
* "audioLanugages": ["The array of audio language"],
* "subtitleLanguages":["The array of subtitle language"],
* },]
* },]
* },]
* },]
* }
*/
settingsObj = JSON.parse(settingStr);
} catch(e) {
debug("File load error: " + e);
return;
}
// validation
if (!this._validateSettings(settingsObj)) {
debug("Failed to validate settings.");
return;
}
// Key is as follow
// {'tunerId':tunerId, 'sourceType':sourceType}
this._internalTuners = new Map();
// TVTunerData
for (let tunerData of settingsObj.tuners) {
let tuner = Cc["@mozilla.org/tv/tvtunerdata;1"]
.createInstance(Ci.nsITVTunerData);
tuner.id = tunerData.id;
tuner.streamType = tuner.TV_STREAM_TYPE_SIMULATOR;
tuner.setSupportedSourceTypes(tunerData.supportedType.length,
tunerData.supportedType);
let wrapTunerData = {
'tuner': tuner,
'channels': new Map(),
'sourceType': undefined,
};
// TVSource
for (let sourceData of tunerData.sources) {
wrapTunerData.sourceType = sourceData.type;
// TVChannel
for (let channelData of sourceData.channels) {
let channel = Cc["@mozilla.org/tv/tvchanneldata;1"]
.createInstance(Ci.nsITVChannelData);
channel.networkId = channelData.networkId;
channel.transportStreamId = channelData.transportStreamId;
channel.serviceId = channelData.serviceId;
channel.type = channelData.type;
channel.name = channelData.name;
channel.number = channelData.number;
channel.isEmergency = channelData.isEmergency;
channel.isFree = channelData.isFree;
let wrapChannelData = {
'channel': channel,
'programs': new Array(),
'videoFilePath': channelData.videoFilePath,
};
// TVProgram
for (let programData of channelData.programs) {
let program = Cc["@mozilla.org/tv/tvprogramdata;1"]
.createInstance(Ci.nsITVProgramData);
program.eventId = programData.eventId;
program.title = programData.title;
program.startTime = programData.startTime;
program.duration = programData.duration;
program.description = programData.description;
program.rating = programData.rating;
program.setAudioLanguages(programData.audioLanguages.length,
programData.audioLanguages);
program.setSubtitleLanguages(programData.subtitleLanguages.length,
programData.subtitleLanguages);
wrapChannelData.programs.push(program);
}
// Sort the program according to the startTime
wrapChannelData.programs.sort(function(a, b) {
return a.startTime - b.startTime;
});
wrapTunerData.channels.set(channel.number, wrapChannelData);
}
// Sort the channel according to the channel number
wrapTunerData.channels = new Map([...wrapTunerData.channels.entries()].sort(function(a, b) {
return a[0] - b[0];
}));
this._internalTuners.set(
this._getTunerMapKey(tuner.id, sourceData.type),
wrapTunerData);
}
}
},
getTuners: function TVSimGetTuners(aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return Cr.NS_ERROR_INVALID_ARG;
}
let tuners = Cc["@mozilla.org/array;1"]
.createInstance(Ci.nsIMutableArray);
for (let [k,wrapTunerData] of this._internalTuners) {
tuners.appendElement(wrapTunerData.tuner, false);
}
return aCallback.notifySuccess(tuners);
},
setSource: function TVSimSetSource(aTunerId, aSourceType, aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return NS_ERROR_INVALID_ARG;
}
let wrapTunerData = this._getWrapTunerData(aTunerId, aSourceType);
if (!wrapTunerData) {
return aCallback.notifyError(Ci.nsITVServiceCallback.TV_ERROR_FAILURE);
}
return aCallback.notifySuccess(null);
},
startScanningChannels: function TVSimStartScanningChannels(aTunerId, aSourceType, aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return Cr.NS_ERROR_INVALID_ARG;
}
let wrapTunerData = this._getWrapTunerData(aTunerId, aSourceType);
if (!wrapTunerData || !wrapTunerData.channels) {
return aCallback.notifyError(Ci.nsITVServiceCallback.TV_ERROR_FAILURE);
}
if (this._scanningWrapTunerData) {
return aCallback.notifyError(Cr.NS_ERROR_DOM_INVALID_STATE_ERR);
}
this._scanningWrapTunerData = wrapTunerData;
aCallback.notifySuccess(null);
for (let [key, wrapChannelData] of wrapTunerData.channels) {
this._sourceListener.notifyChannelScanned(
wrapTunerData.tuner.id,
wrapTunerData.sourceType,
wrapChannelData.channel);
}
this._scanCompleteTimer = Cc["@mozilla.org/timer;1"]
.createInstance(Ci.nsITimer);
let rv = this._scanCompleteTimer.initWithCallback(this, 10,
Ci.nsITimer.TYPE_ONE_SHOT);
return Cr.NS_OK;
},
notify: function TVSimTimerCallback(aTimer) {
if (!this._scanningWrapTunerData) {
return;
}
this._scanCompleteTimer = null;
let notifyResult = this._sourceListener.notifyChannelScanComplete(
this._scanningWrapTunerData.tuner.id,
this._scanningWrapTunerData.sourceType);
this._scanningWrapTunerData = null;
return notifyResult;
},
stopScanningChannels: function TVSimStopScanningChannels(aTunerId, aSourceType, aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return Cr.NS_ERROR_INVALID_ARG;
}
if (!this._scanningWrapTunerData) {
return aCallback.notifyError(Cr.NS_ERROR_DOM_INVALID_STATE_ERR);
}
let wrapTunerData = this._getWrapTunerData(aTunerId, aSourceType);
if (!wrapTunerData) {
return aCallback.notifyError(Ci.nsITVServiceCallback.TV_ERROR_FAILURE);
}
if (this._scanCompleteTimer) {
this._scanCompleteTimer.cancel();
this._scanCompleteTimer = null;
}
if (wrapTunerData.tuner.id === this._scanningWrapTunerData.tuner.id &&
wrapTunerData.sourceType === this._scanningWrapTunerData.sourceType) {
this._scanningWrapTunerData = null;
this._sourceListener.notifyChannelScanStopped(
wrapTunerData.tuner.id,
wrapTunerData.sourceType);
}
return aCallback.notifySuccess(null);
},
clearScannedChannelsCache: function TVSimClearScannedChannelsCache(aTunerId, aSourceType, aCallback) {
// Doesn't support for this method.
return Cr.NS_OK;
},
setChannel: function TVSimSetChannel(aTunerId, aSourceType, aChannelNumber, aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return Cr.NS_ERROR_INVALID_ARG;
}
let channel = Cc["@mozilla.org/array;1"]
.createInstance(Ci.nsIMutableArray);
let wrapTunerData = this._getWrapTunerData(aTunerId, aSourceType);
if (!wrapTunerData || !wrapTunerData.channels) {
return aCallback.notifyError(Ci.nsITVServiceCallback.TV_ERROR_FAILURE);
}
let wrapChannelData = wrapTunerData.channels.get(aChannelNumber);
if (!wrapChannelData) {
return aCallback.notifyError(Ci.nsITVServiceCallback.TV_ERROR_FAILURE);
}
channel.appendElement(wrapChannelData.channel, false);
return aCallback.notifySuccess(channel);
},
getChannels: function TVSimGetChannels(aTunerId, aSourceType, aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return Cr.NS_ERROR_INVALID_ARG;
}
let channelArray = Cc["@mozilla.org/array;1"]
.createInstance(Ci.nsIMutableArray);
let wrapTunerData = this._getWrapTunerData(aTunerId, aSourceType);
if (!wrapTunerData || !wrapTunerData.channels) {
return aCallback.notifyError(Ci.nsITVServiceCallback.TV_ERROR_FAILURE);
}
for (let [key, wrapChannelData] of wrapTunerData.channels) {
channelArray.appendElement(wrapChannelData.channel, false);
}
return aCallback.notifySuccess(channelArray);
},
getPrograms: function TVSimGetPrograms(aTunerId, aSourceType, aChannelNumber, aStartTime, aEndTime, aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return Cr.NS_ERROR_INVALID_ARG;
}
let programArray = Cc["@mozilla.org/array;1"]
.createInstance(Ci.nsIMutableArray);
let wrapTunerData = this._getWrapTunerData(aTunerId, aSourceType);
if (!wrapTunerData || !wrapTunerData.channels) {
return aCallback.notifyError(Ci.nsITVServiceCallback.TV_ERROR_FAILURE);
}
let wrapChannelData = wrapTunerData.channels.get(aChannelNumber);
if (!wrapChannelData || !wrapChannelData.programs) {
return Cr.NS_ERROR_INVALID_ARG;
}
for (let program of wrapChannelData.programs) {
programArray.appendElement(program, false);
}
return aCallback.notifySuccess(programArray);
},
getOverlayId: function TVSimGetOverlayId(aTunerId, aCallback) {
if (!aCallback) {
debug("aCallback is null\n");
return Cr.NS_ERROR_INVALID_ARG;
}
// TVSimulatorService does not use this parameter.
overlayIds = Cc["@mozilla.org/array;1"]
.createInstance(Ci.nsIMutableArray);
return aCallback.notifySuccess(overlayIds);
},
set sourceListener(aListener) {
this._sourceListener = aListener;
},
get sourceListener() {
return this._sourceListener;
},
getSimulatorVideoBlobURL: function TVSimGetSimulatorVideoBlob(aTunerId,
aSourceType,
aChannelNumber,
aWin) {
let wrapTunerData = this._getWrapTunerData(aTunerId, aSourceType);
if (!wrapTunerData || !wrapTunerData.channels) {
return "";
}
let wrapChannelData = wrapTunerData.channels.get(aChannelNumber);
if (!wrapChannelData || !wrapChannelData.videoFilePath) {
return "";
}
let videoFile = new File(this._getFilePath(wrapChannelData.videoFilePath));
let videoBlobURL = aWin.URL.createObjectURL(videoFile);
return videoBlobURL;
},
_getDummyData : function TVSimGetDummyData() {
// Load the setting file from local JSON file.
// Synchrhronous File Reading.
let file = Cc["@mozilla.org/file/local;1"]
.createInstance(Ci.nsILocalFile);
let fstream = Cc["@mozilla.org/network/file-input-stream;1"]
.createInstance(Ci.nsIFileInputStream);
let cstream = Cc["@mozilla.org/intl/converter-input-stream;1"]
.createInstance(Ci.nsIConverterInputStream);
let settingsStr = "";
try {
file.initWithPath(this._getFilePath(TV_SIMULATOR_DUMMY_FILE));
fstream.init(file, -1, 0, 0);
cstream.init(fstream,
"UTF-8",
1024,
Ci.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);
let str = {};
while (cstream.readString(0xffffffff, str) != 0) {
settingsStr += str.value;
}
} catch(e) {
debug("Catch the Exception when reading the dummy file:" + e );
throw e;
} finally {
cstream.close();
}
return settingsStr;
},
_getTunerMapKey: function TVSimGetTunerMapKey(aTunerId, aSourceType) {
return JSON.stringify({'tunerId': aTunerId, 'sourceType': aSourceType});
},
_getWrapTunerData: function TVSimGetWrapTunerData(aTunerId, aSourceType) {
if (!this._internalTuners || this._internalTuners.size <= 0) {
return null;
}
return this._internalTuners.get(this._getTunerMapKey(aTunerId, aSourceType));
},
_getFilePath: function TVSimGetFilePathFromDummyDirectory(fileName) {
let dsFile = Cc["@mozilla.org/file/directory_service;1"]
.getService(Ci.nsIProperties)
.get("ProfD", Ci.nsIFile);
dsFile.append(TV_SIMULATOR_DUMMY_DIRECTORY);
dsFile.append(fileName);
return dsFile.path;
},
_validateSettings: function TVSimValidateSettings(aSettingsObject) {
return this._validateTuners(aSettingsObject.tuners);
},
_validateTuners: function TVSimValidateTuners(aTunersObject) {
let tunerIds = new Array();
for (let tuner of aTunersObject) {
if (!tuner.id ||
!tuner.supportedType ||
!tuner.supportedType.length ||
tuner.supportedType.some(containInvalidSourceType) ||
tunerIds.includes(tuner.id)) {
debug("invalid tuner data.");
return false;
}
tunerIds.push(tuner.id);
if (!this._validateSources(tuner.sources)) {
return false;
}
}
return true;
},
_validateSources: function TVSimValidateSources(aSourcesObject) {
for (let source of aSourcesObject) {
if (!source.type ||
!TV_SOURCE_TYPES.includes(source.type)) {
debug("invalid source data.");
return false;
}
if (!this._validateChannels(source.channels)) {
return false;
}
}
return true;
},
_validateChannels: function TVSimValidateChannels(aChannelsObject) {
let channelNumbers = new Array();
for (let channel of aChannelsObject) {
if (!channel.networkId ||
!channel.transportStreamId ||
!channel.serviceId ||
!channel.type ||
!TV_CHANNEL_TYPES.includes(channel.type) ||
!channel.number ||
channelNumbers.includes(channel.number) ||
!channel.name) {
debug("invalid channel data.");
return false;
}
channelNumbers.push(channel.number);
if (!this._validatePrograms(channel.programs)) {
return false;
}
}
return true;
},
_validatePrograms: function TVSimValidatePrograms(aProgramsObject) {
let eventIds = new Array();
for (let program of aProgramsObject) {
if (!program.eventId ||
eventIds.includes(program.eventId) ||
!program.title ||
!program.startTime ||
!program.duration) {
debug("invalid program data.");
return false;
}
eventIds.push(program.eventId);
}
return true;
},
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([TVSimulatorService]);