mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-15 16:06:41 +03:00
Álvaro Velad Galván
556111143d
It seems that webkitDroppedFrameCount is not included in the prototype but it is included in the video element itself, that's why it fails in WebOS 3. Closes https://github.com/shaka-project/shaka-player/issues/4313
63 lines
1.5 KiB
JavaScript
63 lines
1.5 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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goog.require('shaka.util.Platform');
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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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* @export
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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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* @export
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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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shaka.util.Platform.isWebOS3()) {
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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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