shaka-player/spec/segment_index_parser_spec.js

/**
 * @license
 * Copyright 2015 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.
 */

goog.require('shaka.media.Mp4SegmentIndexParser');
goog.require('shaka.media.WebmSegmentIndexParser');

describe('SegmentIndexParser', function() {
  var url = 'http://example.com/video';
  var sidxData;
  var sidxDataWithNonZeroStart;
  var cuesData;
  var initData;

  beforeAll(function(done) {
    var async = [
      // This file contains just the SIDX, which was extracted from an actual
      // MP4 file.
      createFailover('assets/car-20120827-87.sidx.dat').fetch(),
      // This file contains just the SIDX, which was extracted from an actual
      // MP4 file. It differs from the above SIDX in that it has a non-zero
      // "earliest presentation time" field.
      createFailover('assets/angel_one.sidx.dat').fetch(),
      createFailover('assets/feelings_vp9-20130806-171.webm.cues.dat').fetch(),
      createFailover('assets/feelings_vp9-20130806-171.webm.headers.dat'
                 ).fetch()
    ];

    Promise.all(async).then(
        function(results) {
          sidxData = results[0];
          sidxDataWithNonZeroStart = results[1];
          cuesData = results[2];
          initData = results[3];
          done();
        }
    );
  });

  it('parses an ISO BMFF segment index', function() {
    // The SIDX data was obtained from an MP4 file where the SIDX offset was
    // 708. We use this value here since the expected offsets for parsing this
    // SIDX are known.
    var parser = new shaka.media.Mp4SegmentIndexParser();
    var references = parser.parse(new DataView(sidxData),
                                  708,
                                  [new goog.Uri(url)]);
    expect(references).not.toBeNull();

    // These values are rounded.
    /* gjslint: disable=0001,0006 */
    var expectedStartTimes = [
          0.000,   5.005,  10.010,  15.015,  20.020,  25.025,  30.030,
         35.035,  40.040,  45.045,  50.050,  55.055,  60.060,  65.065,
         70.070,  75.075,  80.080,  85.085,  90.090,  95.095, 100.100,
        105.105, 110.110, 115.115, 120.120, 125.125, 130.130, 135.135,
        140.140, 145.145, 150.150, 155.155, 160.160, 165.165, 170.170,
        175.175, 180.180
    ];

    /* gjslint: disable=0001,0006 */
    var expectedStartBytes = [
          1184,   727647,  1450907,  2164185,  2605829,  3151190,  3854669,
       4574758,  5224472,  5931518,  6320466,  6801107,  7307570,  7697596,
       8336571,  8820074,  9268630,  9706572, 10137561, 10676341, 11384276,
      12089373, 12708006, 13111442, 13805201, 14361322, 14996946, 15676293,
      16273342, 16812658, 17465320, 18038404, 18634288, 18855907, 19386647,
      19580549, 19700059
    ];

    checkReferences(references, url, expectedStartTimes, expectedStartBytes);
  });

  it('correctly handles a non-zero start time', function() {
    // The SIDX data was obtained from an MP4 file where the SIDX offset was
    // 1322. We use this value here since the expected offsets for parsing this
    // SIDX are known.
    var parser = new shaka.media.Mp4SegmentIndexParser();

    var references = parser.parse(new DataView(sidxDataWithNonZeroStart),
                                  1322,
                                  [new goog.Uri('http://example.com/video')]);
    expect(references).not.toBeNull();

    // These values are rounded.
    /* gjslint: disable=0001,0006 */
    var expectedStartTimes = [
          0.040,   3.040,   6.040,   9.040,  11.780,  14.780,  17.460,
         20.460,  23.460,  26.460,  29.460,  32.460,  35.460,  38.460,
         41.460,  44.460,  47.460,  50.460,  52.860,  55.860
    ];

    /* gjslint: disable=0001,0006 */
    var expectedStartBytes = [
          1594,  1175673,  1417937,  1665835,  1973789,  2294769,  2490199,
       2671008,  2954930,  3371950,  3778589,  4073258,  4527374,  5033136,
       5532306,  5788871,  6025088,  6313961,  6642589,  6993868
    ];

    checkReferences(references, url, expectedStartTimes, expectedStartBytes);
  });

  it('parses a WebM segment index', function() {
    var parser = new shaka.media.WebmSegmentIndexParser();
    var references = parser.parse(new DataView(cuesData),
                                  new DataView(initData),
                                  [new goog.Uri('http://example.com/video')]);
    expect(references).not.toBeNull();

    // These values are rounded.
    /* gjslint: disable=0001,0006 */
    var expectedStartTimes = [
         0.000,  10.012,  20.026,  30.048,  40.067,  50.081,  60.100,
        70.111,  80.116,  90.133, 100.136, 110.137, 120.156, 130.159
    ];

    /* gjslint: disable=0001,0006 */
    var expectedStartBytes = [
           4687,  144903,  297659,  459957,  618640,  773028,  924089,
        1069119, 1226240, 1387394, 1545708, 1699983, 1859342, 2009816
    ];

    checkReferences(references, url, expectedStartTimes, expectedStartBytes);
  });
});