mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-17 16:26:39 +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
59 lines
1.4 KiB
JavaScript
59 lines
1.4 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.polyfill.VideoPlaybackQuality');
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goog.require('shaka.polyfill');
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/**
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* @summary A polyfill to provide MSE VideoPlaybackQuality metrics.
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* Many browsers do not yet provide this API, and Chrome currently provides
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* similar data through individual prefixed attributes on HTMLVideoElement.
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*/
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shaka.polyfill.VideoPlaybackQuality = class {
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/**
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* Install the polyfill if needed.
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*/
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static install() {
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if (!window.HTMLVideoElement) {
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// Avoid errors on very old browsers.
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return;
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}
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// eslint-disable-next-line no-restricted-syntax
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const proto = HTMLVideoElement.prototype;
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if (proto.getVideoPlaybackQuality) {
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// No polyfill needed.
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return;
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}
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if ('webkitDroppedFrameCount' in proto) {
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proto.getVideoPlaybackQuality =
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shaka.polyfill.VideoPlaybackQuality.webkit_;
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}
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}
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/**
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* @this {HTMLVideoElement}
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* @return {!VideoPlaybackQuality}
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* @private
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*/
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static webkit_() {
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return {
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'droppedVideoFrames': this.webkitDroppedFrameCount,
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'totalVideoFrames': this.webkitDecodedFrameCount,
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// Not provided by this polyfill:
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'corruptedVideoFrames': 0,
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'creationTime': NaN,
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'totalFrameDelay': 0,
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};
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}
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};
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shaka.polyfill.register(shaka.polyfill.VideoPlaybackQuality.install);
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