shaka-player
Version:
DASH/EME video player library
71 lines (62 loc) • 2.03 kB
JavaScript
/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.util.ManifestFilter');
goog.require('shaka.media.MediaSourceEngine');
goog.require('shaka.util.StreamUtils');
goog.requireType('shaka.media.DrmEngine');
/**
* This utility class contains all the functions used to filter manifests
* before playback and before storage.
*/
shaka.util.ManifestFilter = class {
/**
* Filter the variants in |manifest| to only include the variants that meet
* the given restrictions.
*
* @param {shaka.extern.Manifest} manifest
* @param {shaka.extern.Restrictions} restrictions
* @param {{width: number, height:number}} maxHwResolution
*/
static filterByRestrictions(manifest, restrictions, maxHwResolution) {
manifest.variants = manifest.variants.filter((variant) => {
return shaka.util.StreamUtils.meetsRestrictions(
variant, restrictions, maxHwResolution);
});
}
/**
* Filter the variants in the |manifest| to only include those that are
* supported by media source.
*
* @param {shaka.extern.Manifest} manifest
*/
static filterByMediaSourceSupport(manifest) {
const MediaSourceEngine = shaka.media.MediaSourceEngine;
manifest.variants = manifest.variants.filter((variant) => {
let supported = true;
if (variant.audio) {
supported =
supported && MediaSourceEngine.isStreamSupported(variant.audio);
}
if (variant.video) {
supported =
supported && MediaSourceEngine.isStreamSupported(variant.video);
}
return supported;
});
}
/**
* Filter the variants in |manifest| to only include those that are supported
* by |drm|.
*
* @param {shaka.extern.Manifest} manifest
* @param {!shaka.media.DrmEngine} drmEngine
*/
static filterByDrmSupport(manifest, drmEngine) {
manifest.variants = manifest.variants.filter((variant) => {
return drmEngine.supportsVariant(variant);
});
}
};