shaka-player/test/text/mp4_ttml_parser_unit.js

DASH/EME video player library

/**
 * @license
 * Copyright 2016 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

describe('Mp4TtmlParser', function() {
  const ttmlInitSegmentUri = '/base/test/test/assets/ttml-init.mp4';
  const ttmlSegmentUri = '/base/test/test/assets/ttml-segment.mp4';
  const ttmlSegmentMultipleMDATUri =
      '/base/test/test/assets/ttml-segment-multiplemdat.mp4';
  const audioInitSegmentUri = '/base/test/test/assets/sintel-audio-init.mp4';

  /** @type {!Uint8Array} */
  let ttmlInitSegment;
  /** @type {!Uint8Array} */
  let ttmlSegment;
  /** @type {!Uint8Array} */
  let ttmlSegmentMultipleMDAT;
  /** @type {!Uint8Array} */
  let audioInitSegment;

  beforeAll(function(done) {
    Promise.all([
      shaka.test.Util.fetch(ttmlInitSegmentUri),
      shaka.test.Util.fetch(ttmlSegmentUri),
      shaka.test.Util.fetch(ttmlSegmentMultipleMDATUri),
      shaka.test.Util.fetch(audioInitSegmentUri),
    ]).then(function(responses) {
      ttmlInitSegment = new Uint8Array(responses[0]);
      ttmlSegment = new Uint8Array(responses[1]);
      ttmlSegmentMultipleMDAT = new Uint8Array(responses[2]);
      audioInitSegment = new Uint8Array(responses[3]);
    }).catch(fail).then(done);
  });

  it('parses init segment', function() {
    new shaka.text.Mp4TtmlParser().parseInit(ttmlInitSegment);
  });

  it('parses media segment', function() {
    let parser = new shaka.text.Mp4TtmlParser();
    parser.parseInit(ttmlInitSegment);
    let time = {periodStart: 0, segmentStart: 0, segmentEnd: 0};
    let ret = parser.parseMedia(ttmlSegment, time);
    expect(ret.length).toBe(10);
  });

  it('handles media segments with multiple mdats', function() {
    let parser = new shaka.text.Mp4TtmlParser();
    parser.parseInit(ttmlInitSegment);
    let time = {periodStart: 0, segmentStart: 0, segmentEnd: 0};
    let ret = parser.parseMedia(ttmlSegmentMultipleMDAT, time);
    expect(ret.length).toBe(20);
  });

  it('accounts for offset', function() {
    let time1 = {periodStart: 0, segmentStart: 0, segmentEnd: 0};
    let time2 = {periodStart: 7, segmentStart: 0, segmentEnd: 0};

    let parser = new shaka.text.Mp4TtmlParser();
    parser.parseInit(ttmlInitSegment);

    let ret1 = parser.parseMedia(ttmlSegment, time1);
    expect(ret1.length).toBeGreaterThan(0);

    let ret2 = parser.parseMedia(ttmlSegment, time2);
    expect(ret2.length).toBeGreaterThan(0);

    expect(ret2[0].startTime).toEqual(ret1[0].startTime + 7);
    expect(ret2[0].endTime).toEqual(ret1[0].endTime + 7);
  });

  it('rejects init segment with no ttml', function() {
    let error = new shaka.util.Error(
        shaka.util.Error.Severity.CRITICAL,
        shaka.util.Error.Category.TEXT,
        shaka.util.Error.Code.INVALID_MP4_TTML);

    try {
      new shaka.text.Mp4TtmlParser().parseInit(audioInitSegment);
      fail('Mp4 file with no ttml supported');
    } catch (e) {
      shaka.test.Util.expectToEqualError(e, error);
    }
  });
});