mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-14 15:56:38 +03:00
Joey Parrish
625938e2f9
This reverts commit 6e5a0797de, #2042.
The PR as it landed broke some test cases and functionality for storing persistent licenses, and it doesn't seem to work even for its intended use case.
113 lines
3.0 KiB
JavaScript
113 lines
3.0 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.util.Pssh');
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goog.require('goog.asserts');
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goog.require('shaka.log');
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goog.require('shaka.util.Iterables');
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goog.require('shaka.util.Mp4Parser');
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goog.require('shaka.util.Uint8ArrayUtils');
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/**
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* @summary
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* Parse a PSSH box and extract the system IDs.
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*/
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shaka.util.Pssh = class {
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/**
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* @param {!Uint8Array} psshBox
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* @throws {shaka.util.Error} if a PSSH box is truncated or contains a size
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* field over 53 bits.
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*/
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constructor(psshBox) {
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/**
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* In hex.
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* @type {!Array.<string>}
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*/
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this.systemIds = [];
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/**
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* In hex.
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* @type {!Array.<string>}
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*/
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this.cencKeyIds = [];
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/*
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* Array of tuples that define the startIndex + size for each
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* discrete pssh within |psshBox|
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* */
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this.dataBoundaries = [];
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new shaka.util.Mp4Parser()
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.fullBox('pssh', (box) => this.parseBox_(box))
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.parse(psshBox.buffer);
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if (this.dataBoundaries.length == 0) {
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shaka.log.warning('No pssh box found!');
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}
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}
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/**
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* @param {!shaka.extern.ParsedBox} box
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* @private
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*/
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parseBox_(box) {
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goog.asserts.assert(
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box.version != null,
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'PSSH boxes are full boxes and must have a valid version');
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goog.asserts.assert(
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box.flags != null,
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'PSSH boxes are full boxes and must have a valid flag');
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if (box.version > 1) {
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shaka.log.warning('Unrecognized PSSH version found!');
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return;
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}
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const systemId = shaka.util.Uint8ArrayUtils.toHex(box.reader.readBytes(16));
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const keyIds = [];
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if (box.version > 0) {
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const numKeyIds = box.reader.readUint32();
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for (const _ of shaka.util.Iterables.range(numKeyIds)) {
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shaka.util.Functional.ignored(_);
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const keyId =
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shaka.util.Uint8ArrayUtils.toHex(box.reader.readBytes(16));
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keyIds.push(keyId);
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}
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}
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const dataSize = box.reader.readUint32();
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box.reader.skip(dataSize); // Ignore the data section.
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// Now that everything has been succesfully parsed from this box,
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// update member variables.
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this.cencKeyIds.push(...keyIds);
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this.systemIds.push(systemId);
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this.dataBoundaries.push({
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start: box.start,
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end: box.start + box.size - 1,
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});
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if (box.reader.getPosition() != box.reader.getLength()) {
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shaka.log.warning('Mismatch between box size and data size!');
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}
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}
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};
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