shaka-player/test/media/webm_segment_index_parser_unit.js

DASH/EME video player library

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

describe('WebmSegmentIndexParser', () => {
  const indexSegmentUri = '/base/test/test/assets/index-segment.webm';
  const initSegmentUri = '/base/test/test/assets/init-segment.webm';

  let indexSegment;
  let initSegment;

  beforeAll(async () => {
    const responses = await Promise.all([
      shaka.test.Util.fetch(indexSegmentUri),
      shaka.test.Util.fetch(initSegmentUri),
    ]);
    indexSegment = responses[0];
    initSegment = responses[1];
  });

  it('rejects a non-index segment ', () => {
    const error = shaka.test.Util.jasmineError(new shaka.util.Error(
        shaka.util.Error.Severity.CRITICAL,
        shaka.util.Error.Category.MEDIA,
        shaka.util.Error.Code.WEBM_CUES_ELEMENT_MISSING));
    expect(() => shaka.media.WebmSegmentIndexParser.parse(
        /* indexSegment= */ initSegment,  // deliberate wrong data
        /* initSegment= */ initSegment,
        /* uris= */ [],
        /* initSegmentReference= */ null,
        /* timestampOffset= */ 0,
        /* appendWindowStart= */ 0,
        /* appendWindowEnd= */ Infinity)).toThrow(error);
  });

  it('rejects an invalid init segment ', () => {
    const error = shaka.test.Util.jasmineError(new shaka.util.Error(
        shaka.util.Error.Severity.CRITICAL,
        shaka.util.Error.Category.MEDIA,
        shaka.util.Error.Code.WEBM_EBML_HEADER_ELEMENT_MISSING));
    expect(() => shaka.media.WebmSegmentIndexParser.parse(
        /* indexSegment= */ indexSegment,
        /* initSegment= */ indexSegment,  // deliberate wrong data
        /* uris= */ [],
        /* initSegmentReference= */ null,
        /* timestampOffset= */ 0,
        /* appendWindowStart= */ 0,
        /* appendWindowEnd= */ Infinity)).toThrow(error);
  });

  it('parses index segment ', () => {
    const result = shaka.media.WebmSegmentIndexParser.parse(
        indexSegment, initSegment,
        /* uris= */ [],
        /* initSegmentReference= */ null,
        /* timestampOffset= */ 0,
        /* appendWindowStart= */ 0,
        /* appendWindowEnd= */ Infinity);
    const references = [
      {startTime: 0, endTime: 12, startByte: 281, endByte: 95911},
      {startTime: 12, endTime: 24, startByte: 95912, endByte: 209663},
      {startTime: 24, endTime: 36, startByte: 209664, endByte: 346545},
      {startTime: 36, endTime: 48, startByte: 346546, endByte: 458817},
      {startTime: 48, endTime: 60, startByte: 458818, endByte: null},
    ];

    expect(result).toEqual(references.map((o) => jasmine.objectContaining(o)));
  });

  it('takes a timestamp offset in seconds', () => {
    const result = shaka.media.WebmSegmentIndexParser.parse(
        indexSegment, initSegment,
        /* uris= */ [],
        /* initSegmentReference= */ null,
        /* timestampOffset= */ -2,
        /* appendWindowStart= */ 0,
        /* appendWindowEnd= */ Infinity);
    const references = [
      {startTime: -2, endTime: 10},
      {startTime: 10, endTime: 22},
      {startTime: 22, endTime: 34},
      {startTime: 34, endTime: 46},
      {startTime: 46, endTime: 58},
    ];

    expect(result).toEqual(references.map((o) => jasmine.objectContaining(o)));
  });
});