mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-24 17:35:10 +03:00
Joey Parrish
f539147d48
This fixes all the license headers in the main library, which corrects the appearance of the main license in the compiled output. It seems that the `!` in the header forces the compiler to keep it in the output. I believe older compiler releases did this purely based on `@license`. Issue #2638 Change-Id: I7f0e918caad10c9af689c9d07672b7fe9be7b2f3
98 lines
2.7 KiB
JavaScript
98 lines
2.7 KiB
JavaScript
/*! @license
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* Shaka Player
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* Copyright 2016 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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goog.provide('shaka.media.RegionTimeline');
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goog.require('shaka.util.IReleasable');
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/**
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* The region timeline is a set of unique timeline region info entries. When
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* a new entry is added, the |onAddRegion| callback will be called.
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*
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* @implements {shaka.util.IReleasable}
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* @final
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*/
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shaka.media.RegionTimeline = class {
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constructor() {
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/** @private {function(shaka.extern.TimelineRegionInfo)} */
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this.onAddRegion_ = (region) => {};
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/** @private {!Set.<shaka.extern.TimelineRegionInfo>} */
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this.regions_ = new Set();
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}
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/** @override */
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release() {
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// Prevent us from holding onto any external references via the callback.
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this.onAddRegion_ = (region) => {};
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this.regions_.clear();
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}
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/**
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* Set the callbacks for events. This will override any previous calls to
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* |setListeners|.
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*
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* @param {function(shaka.extern.TimelineRegionInfo)} onAddRegion
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* Set the callback for when we add a new region. This callback will only
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* be called when a region is unique (we reject duplicate regions).
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*/
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setListeners(onAddRegion) {
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this.onAddRegion_ = onAddRegion;
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}
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/**
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* @param {shaka.extern.TimelineRegionInfo} region
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*/
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addRegion(region) {
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const similarRegion = this.findSimilarRegion_(region);
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// Make sure we don't add duplicate regions. We keep track of this here
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// instead of making the parser track it.
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if (similarRegion == null) {
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this.regions_.add(region);
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this.onAddRegion_(region);
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}
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}
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/**
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* Find a region in the timeline that has the same scheme id uri, event id,
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* start time and end time. If these four parameters match, we assume it
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* to be the same region. If no similar region can be found, |null| will be
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* returned.
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*
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* @param {shaka.extern.TimelineRegionInfo} region
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* @return {?shaka.extern.TimelineRegionInfo}
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* @private
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*/
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findSimilarRegion_(region) {
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for (const existing of this.regions_) {
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// The same scheme ID and time range means that it is similar-enough to
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// be the same region.
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const isSimilar = existing.schemeIdUri == region.schemeIdUri &&
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existing.id == region.id &&
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existing.startTime == region.startTime &&
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existing.endTime == region.endTime;
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if (isSimilar) {
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return existing;
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}
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}
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return null;
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}
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/**
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* Get an iterable for all the regions in the timeline. This will allow
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* others to see what regions are in the timeline while not being able to
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* change the collection.
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*
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* @return {!Iterable.<shaka.extern.TimelineRegionInfo>}
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*/
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regions() {
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return this.regions_;
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}
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};
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