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GMPUtils.jsm
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GMPUtils.jsm
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/* 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";
var EXPORTED_SYMBOLS = [ "GMP_PLUGIN_IDS",
"GMPPrefs",
"GMPUtils",
"OPEN_H264_ID",
"WIDEVINE_ID" ];
const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
const {AppConstants} = ChromeUtils.import("resource://gre/modules/AppConstants.jsm");
const {UpdateUtils} = ChromeUtils.import("resource://gre/modules/UpdateUtils.jsm");
// GMP IDs
const OPEN_H264_ID = "gmp-gmpopenh264";
const WIDEVINE_ID = "gmp-widevinecdm";
const GMP_PLUGIN_IDS = [ OPEN_H264_ID, WIDEVINE_ID ];
var GMPUtils = {
/**
* Checks whether or not a given plugin is hidden. Hidden plugins are neither
* downloaded nor displayed in the addons manager.
* @param aPlugin
* The plugin to check.
*/
isPluginHidden(aPlugin) {
if (this._is32bitModeMacOS()) {
// GMPs are hidden on MacOS when running in 32 bit mode.
// See bug 1291537.
return true;
}
if (!this._isPluginSupported(aPlugin) ||
!this._isPluginVisible(aPlugin)) {
return true;
}
if (!aPlugin.isEME) {
return false;
}
if (!GMPPrefs.getBool(GMPPrefs.KEY_EME_ENABLED, true)) {
return true;
}
return false;
},
/**
* Checks whether or not a given plugin is supported by the current OS.
* @param aPlugin
* The plugin to check.
*/
_isPluginSupported(aPlugin) {
if (this._isPluginForceSupported(aPlugin)) {
return true;
}
if (aPlugin.id == WIDEVINE_ID) {
// The Widevine plugin is available for Windows versions Vista and later,
// Mac OSX, and Linux.
return AppConstants.platform == "win" ||
AppConstants.platform == "macosx" ||
AppConstants.platform == "linux";
}
return true;
},
_is32bitModeMacOS() {
if (AppConstants.platform != "macosx") {
return false;
}
return Services.appinfo.XPCOMABI.split("-")[0] == "x86";
},
/**
* Checks whether or not a given plugin is visible in the addons manager
* UI and the "enable DRM" notification box. This can be used to test
* plugins that aren't yet turned on in the mozconfig.
* @param aPlugin
* The plugin to check.
*/
_isPluginVisible(aPlugin) {
return GMPPrefs.getBool(GMPPrefs.KEY_PLUGIN_VISIBLE, false, aPlugin.id);
},
/**
* Checks whether or not a given plugin is forced-supported. This is used
* in automated tests to override the checks that prevent GMPs running on an
* unsupported platform.
* @param aPlugin
* The plugin to check.
*/
_isPluginForceSupported(aPlugin) {
return GMPPrefs.getBool(GMPPrefs.KEY_PLUGIN_FORCE_SUPPORTED, false, aPlugin.id);
},
_isWindowsOnARM64() {
return AppConstants.platform == "win" && UpdateUtils.ABI.match(/aarch64/);
},
_expectedABI(aPlugin) {
let defaultABI = UpdateUtils.ABI;
if (aPlugin.id == WIDEVINE_ID && this._isWindowsOnARM64()) {
// On Windows on aarch64, we need the x86 plugin,
// as there's no native aarch64 plugins yet.
defaultABI = defaultABI.replace(/aarch64/g, "x86");
}
return defaultABI;
},
};
/**
* Manages preferences for GMP addons
*/
var GMPPrefs = {
KEY_EME_ENABLED: "media.eme.enabled",
KEY_PLUGIN_ENABLED: "media.{0}.enabled",
KEY_PLUGIN_LAST_UPDATE: "media.{0}.lastUpdate",
KEY_PLUGIN_VERSION: "media.{0}.version",
KEY_PLUGIN_AUTOUPDATE: "media.{0}.autoupdate",
KEY_PLUGIN_VISIBLE: "media.{0}.visible",
KEY_PLUGIN_ABI: "media.{0}.abi",
KEY_PLUGIN_FORCE_SUPPORTED: "media.{0}.forceSupported",
KEY_URL: "media.gmp-manager.url",
KEY_URL_OVERRIDE: "media.gmp-manager.url.override",
KEY_CERT_CHECKATTRS: "media.gmp-manager.cert.checkAttributes",
KEY_CERT_REQUIREBUILTIN: "media.gmp-manager.cert.requireBuiltIn",
KEY_UPDATE_LAST_CHECK: "media.gmp-manager.lastCheck",
KEY_SECONDS_BETWEEN_CHECKS: "media.gmp-manager.secondsBetweenChecks",
KEY_UPDATE_ENABLED: "media.gmp-manager.updateEnabled",
KEY_APP_DISTRIBUTION: "distribution.id",
KEY_APP_DISTRIBUTION_VERSION: "distribution.version",
KEY_BUILDID: "media.gmp-manager.buildID",
KEY_CERTS_BRANCH: "media.gmp-manager.certs.",
KEY_PROVIDER_ENABLED: "media.gmp-provider.enabled",
KEY_LOG_BASE: "media.gmp.log.",
KEY_LOGGING_LEVEL: "media.gmp.log.level",
KEY_LOGGING_DUMP: "media.gmp.log.dump",
/**
* Obtains the specified string preference in relation to the specified plugin.
* @param aKey The preference key value to use.
* @param aDefaultValue The default value if no preference exists.
* @param aPlugin The plugin to scope the preference to.
* @return The obtained preference value, or the defaultValue if none exists.
*/
getString(aKey, aDefaultValue, aPlugin) {
if (aKey === this.KEY_APP_DISTRIBUTION ||
aKey === this.KEY_APP_DISTRIBUTION_VERSION) {
return Services.prefs.getDefaultBranch(null).getCharPref(aKey, "default");
}
return Services.prefs.getStringPref(this.getPrefKey(aKey, aPlugin), aDefaultValue);
},
/**
* Obtains the specified int preference in relation to the specified plugin.
* @param aKey The preference key value to use.
* @param aDefaultValue The default value if no preference exists.
* @param aPlugin The plugin to scope the preference to.
* @return The obtained preference value, or the defaultValue if none exists.
*/
getInt(aKey, aDefaultValue, aPlugin) {
return Services.prefs.getIntPref(this.getPrefKey(aKey, aPlugin), aDefaultValue);
},
/**
* Obtains the specified bool preference in relation to the specified plugin.
* @param aKey The preference key value to use.
* @param aDefaultValue The default value if no preference exists.
* @param aPlugin The plugin to scope the preference to.
* @return The obtained preference value, or the defaultValue if none exists.
*/
getBool(aKey, aDefaultValue, aPlugin) {
return Services.prefs.getBoolPref(this.getPrefKey(aKey, aPlugin), aDefaultValue);
},
/**
* Sets the specified string preference in relation to the specified plugin.
* @param aKey The preference key value to use.
* @param aVal The value to set.
* @param aPlugin The plugin to scope the preference to.
*/
setString(aKey, aVal, aPlugin) {
Services.prefs.setStringPref(this.getPrefKey(aKey, aPlugin), aVal);
},
/**
* Sets the specified bool preference in relation to the specified plugin.
* @param aKey The preference key value to use.
* @param aVal The value to set.
* @param aPlugin The plugin to scope the preference to.
*/
setBool(aKey, aVal, aPlugin) {
Services.prefs.setBoolPref(this.getPrefKey(aKey, aPlugin), aVal);
},
/**
* Sets the specified int preference in relation to the specified plugin.
* @param aKey The preference key value to use.
* @param aVal The value to set.
* @param aPlugin The plugin to scope the preference to.
*/
setInt(aKey, aVal, aPlugin) {
Services.prefs.setIntPref(this.getPrefKey(aKey, aPlugin), aVal);
},
/**
* Checks whether or not the specified preference is set in relation to the
* specified plugin.
* @param aKey The preference key value to use.
* @param aPlugin The plugin to scope the preference to.
* @return true if the preference is set, false otherwise.
*/
isSet(aKey, aPlugin) {
return Services.prefs.prefHasUserValue(this.getPrefKey(aKey, aPlugin));
},
/**
* Resets the specified preference in relation to the specified plugin to its
* default.
* @param aKey The preference key value to use.
* @param aPlugin The plugin to scope the preference to.
*/
reset(aKey, aPlugin) {
Services.prefs.clearUserPref(this.getPrefKey(aKey, aPlugin));
},
/**
* Scopes the specified preference key to the specified plugin.
* @param aKey The preference key value to use.
* @param aPlugin The plugin to scope the preference to.
* @return A preference key scoped to the specified plugin.
*/
getPrefKey(aKey, aPlugin) {
return aKey.replace("{0}", aPlugin || "");
},
};