shaka-player
Version:
DASH/EME video player library
208 lines (181 loc) • 6.11 kB
JavaScript
/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.log');
goog.require('goog.asserts');
/**
* @summary
* A console logging framework which is compiled out for deployment. This is
* only available when using the uncompiled version.
* @exportDoc
*/
shaka.log = class {
/**
* This always logs to the console, even in Release mode. This should only be
* used for deprecation messages and things the app should never ignore.
*
* @param {...*} args
*/
static alwaysError(...args) {}
/**
* This always logs to the console, even in Release mode. This should only be
* used for deprecation messages and things the app should never ignore.
*
* @param {...*} args
*/
static alwaysWarn(...args) {}
/**
* This always logs to the console, even in Release mode. This should only be
* used for deprecation messages and things the app should never ignore.
*
* @param {string} id
* @param {...*} args
*/
static warnOnce(id, ...args) {
if (shaka.log.oneTimeWarningIssued_.has(id)) {
return;
}
shaka.log.oneTimeWarningIssued_.add(id);
shaka.log.alwaysWarn(...args);
}
/**
* This log is for when an error occurs. This should always be accompanied
* with an error event, thrown exception, or rejected Promise. Logs are
* disabled in Release mode, so there should be other methods of detecting the
* error.
*
* @param {...*} args
*/
static error(...args) {}
/**
* This log is for possible errors or things that may be surprising to a user.
* For example, if we work around unusual or bad content, we should warn that
* they should fix their content. Deprecation messages and messages the app
* shouldn't ignore should use alwaysWarn instead.
*
* @param {...*} args
*/
static warning(...args) {}
/**
* This log is for messages to the user about what is happening. For example,
* when we update a manifest or install a polyfill.
*
* @param {...*} args
*/
static info(...args) {}
/**
* This log is to aid *users* in debugging their content. This should be for
* logs about the content and what we do with it. For example, when we change
* streams or what we are choosing.
*
* @param {...*} args
*/
static debug(...args) {}
/**
* This log is for debugging Shaka Player itself. This may be logs about
* internal states or events. This may also be for more verbose logs about
* content, such as for segment appends.
*
* @param {...*} args
*/
static v1(...args) {}
/**
* This log is for tracing and debugging Shaka Player. These logs will happen
* a lot, for example, logging every segment append or every update check.
* These are mostly used for tracking which calls happen through the code.
*
* @param {...*} args
*/
static v2(...args) {}
};
/**
* Log levels.
* @enum {number}
* @exportDoc
*/
shaka.log.Level = {
NONE: 0,
ERROR: 1,
WARNING: 2,
INFO: 3,
DEBUG: 4,
V1: 5,
V2: 6,
};
/**
* @define {number} the maximum log level.
*/
shaka.log.MAX_LOG_LEVEL = 3;
/**
* A Set to indicate which one-time warnings have been issued.
*
* @private {!Set<string>}
*/
shaka.log.oneTimeWarningIssued_ = new Set();
if (window.console) {
/** @private {!Map<shaka.log.Level, function(...*)>} */
shaka.log.logMap_ = new Map()
.set(shaka.log.Level.ERROR, (...args) => console.error(...args))
.set(shaka.log.Level.WARNING, (...args) => console.warn(...args))
.set(shaka.log.Level.INFO, (...args) => console.info(...args))
.set(shaka.log.Level.DEBUG, (...args) => console.log(...args))
.set(shaka.log.Level.V1, (...args) => console.debug(...args))
.set(shaka.log.Level.V2, (...args) => console.debug(...args));
shaka.log.alwaysWarn = (...args) => console.warn(...args);
shaka.log.alwaysError = (...args) => console.error(...args);
if (goog.DEBUG) {
// Since we don't want to export shaka.log in production builds, we don't
// use the @export annotation. But the module wrapper (used in debug builds
// since v2.5.11) hides anything non-exported. This is a debug-only,
// API-based export to make sure logging is available in debug builds.
goog.exportSymbol('shaka.log', shaka.log);
/** @type {number} */
shaka.log.currentLevel;
/**
* Change the log level. Useful for debugging in uncompiled mode.
*
* @param {number} level
* @exportDoc
*/
shaka.log.setLevel = (level) => {
const getLog = (curLevel) => {
if (curLevel <= level) {
goog.asserts.assert(
shaka.log.logMap_.has(curLevel), 'Unexpected log level');
return shaka.log.logMap_.get(curLevel);
} else {
return () => {};
}
};
shaka.log.currentLevel = level;
shaka.log.error = getLog(shaka.log.Level.ERROR);
shaka.log.warning = getLog(shaka.log.Level.WARNING);
shaka.log.info = getLog(shaka.log.Level.INFO);
shaka.log.debug = getLog(shaka.log.Level.DEBUG);
shaka.log.v1 = getLog(shaka.log.Level.V1);
shaka.log.v2 = getLog(shaka.log.Level.V2);
};
shaka.log.setLevel(shaka.log.MAX_LOG_LEVEL);
} else {
if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.ERROR) {
shaka.log.error = shaka.log.logMap_.get(shaka.log.Level.ERROR);
}
if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.WARNING) {
shaka.log.warning = shaka.log.logMap_.get(shaka.log.Level.WARNING);
}
if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.INFO) {
shaka.log.info = shaka.log.logMap_.get(shaka.log.Level.INFO);
}
if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.DEBUG) {
shaka.log.debug = shaka.log.logMap_.get(shaka.log.Level.DEBUG);
}
if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.V1) {
shaka.log.v1 = shaka.log.logMap_.get(shaka.log.Level.V1);
}
if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.V2) {
shaka.log.v2 = shaka.log.logMap_.get(shaka.log.Level.V2);
}
}
}