shaka-player/test/cea/mp4_cea_parser_unit.js

/*! @license
 * Shaka Player
 * Copyright 2016 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

goog.require('shaka.cea.Mp4CeaParser');
goog.require('shaka.test.Util');
goog.require('shaka.util.Error');

describe('Mp4CeaParser', () => {
  const ceaInitSegmentUri = '/base/test/test/assets/cea-init.mp4';
  const ceaSegmentUri = '/base/test/test/assets/cea-segment.mp4';

  /** @type {!ArrayBuffer} */
  let ceaInitSegment;
  /** @type {!ArrayBuffer} */
  let ceaSegment;

  beforeAll(async () => {
    const responses = await Promise.all([
      shaka.test.Util.fetch(ceaInitSegmentUri),
      shaka.test.Util.fetch(ceaSegmentUri),
    ]);
    ceaInitSegment = responses[0];
    ceaSegment = responses[1];
  });

  it('parses cea data from mp4 stream', () => {
    const cea708Parser = new shaka.cea.Mp4CeaParser();

    const expectedCea708Packet = new Uint8Array([
      0xb5, 0x00, 0x31, 0x47, 0x41, 0x39, 0x34, 0x03,
      0xce, 0xff, 0xfd, 0x94, 0x20, 0xfd, 0x94, 0xae,
      0xfd, 0x91, 0x62, 0xfd, 0x73, 0xf7, 0xfd, 0xe5,
      0xba, 0xfd, 0x91, 0xb9, 0xfd, 0xb0, 0xb0, 0xfd,
      0xba, 0xb0, 0xfd, 0xb0, 0xba, 0xfd, 0xb0, 0x31,
      0xfd, 0xba, 0xb0, 0xfd, 0xb0, 0x80, 0xfd, 0x94,
      0x2c, 0xfd, 0x94, 0x2f, 0xff,
    ]);

    cea708Parser.init(ceaInitSegment);
    const cea708Packets = cea708Parser.parse(ceaSegment);
    expect(cea708Packets).toBeDefined();
    expect(cea708Packets.length).toBe(4);
    expect(cea708Packets[cea708Packets.length - 1].packet)
        .toEqual(expectedCea708Packet);
  });

  it('parses an invalid init segment', () => {
    const cea708Parser = new shaka.cea.Mp4CeaParser();

    const expected = Util.jasmineError(new shaka.util.Error(
        shaka.util.Error.Severity.CRITICAL,
        shaka.util.Error.Category.TEXT,
        shaka.util.Error.Code.INVALID_MP4_CEA));

    expect(() => {
      cea708Parser.init(ceaSegment);
    }).toThrow(expected);
  });
});