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playhead_unit.js
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playhead_unit.js
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/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @typedef {{start: number, end: number}}
*
* @property {number} start
* The start time of the range, in seconds.
* @property {number} end
* The end time of the range, in seconds.
*/
let TimeRange;
/**
* @typedef {{
* buffered: !Array.<TimeRange>,
* start: number,
* waitingAt: number,
* expectedEndTime: number,
* expectEvent: boolean,
* }}
*
* @description
* Parameters for a test where we start playing inside a buffered range and play
* until the end of the buffer. Then, if we expect it, Playhead should jump
* to the expected time. We should get a 'stalldetected' event when the Playhead
* detects a stall through the StallDetector, and a 'gapjumped' event when the
* Playhead jumps over a gap in the buffered range(s).
*
* @property {!Array.<TimeRange>} buffered
* The buffered ranges for the test.
* @property {number} start
* The time to start playing at.
* @property {number} waitingAt
* The time to pause at and fire a 'waiting' event.
* @property {number} expectedEndTime
* The expected time at the end of the test.
* @property {boolean} expectEvent
* If true, expect either the 'stalldetected' or 'gapjumped' event to be
* fired.
*/
let PlayingTestInfo;
/**
* @typedef {{
* buffered: !Array.<TimeRange>,
* newBuffered: (!Array.<TimeRange>|undefined),
* start: number,
* seekTo: number,
* expectedEndTime: number,
* expectEvent: boolean,
* }}
*
* @description
* Parameters for a test where we start playing inside a buffered range and seek
* to a given time, which may have different buffered ranges. If we are in a
* gap, Playhead should jump the gap to the expected time.
*
* @property {!Array.<TimeRange>} buffered
* The buffered ranges for the test.
* @property {(!Array.<TimeRange>|undefined)} newBuffered
* Used in the unbuffered seek tests. Represents the buffered ranges to
* use after the seek.
* @property {number} start
* The time to start playing at.
* @property {number} seekTo
* The time to seek to.
* @property {number} expectedEndTime
* The expected time at the end of the test.
* @property {boolean} expectEvent
* If true, expect either the 'stalldetected' or 'gapjumped' event to be
* fired.
*/
let SeekTestInfo;
describe('Playhead', () => {
const Util = shaka.test.Util;
/** @type {!shaka.test.FakeVideo} */
let video;
/** @type {!shaka.test.FakePresentationTimeline} */
let timeline;
/** @type {shaka.extern.Manifest} */
let manifest;
/** @type {!shaka.media.Playhead} */
let playhead;
/** @type {shaka.extern.StreamingConfiguration} */
let config;
// Callback to us from Playhead when a valid 'seeking' event occurs.
/** @type {!jasmine.Spy} */
let onSeek;
// Callback to us from Playhead when an event should be sent to the app.
/** @type {!jasmine.Spy} */
let onEvent;
beforeAll(() => {
jasmine.clock().install();
});
afterAll(() => {
jasmine.clock().uninstall();
});
beforeEach(() => {
video = new shaka.test.FakeVideo();
timeline = new shaka.test.FakePresentationTimeline();
onSeek = jasmine.createSpy('onSeek');
onEvent = jasmine.createSpy('onEvent');
timeline.isLive.and.returnValue(false);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
timeline.getDuration.and.returnValue(60);
// These tests should not cause these methods to be invoked.
timeline.getSegmentAvailabilityStart.and.throwError(new Error());
timeline.getSegmentAvailabilityEnd.and.throwError(new Error());
timeline.setDuration.and.throwError(new Error());
manifest = {
variants: [],
textStreams: [],
imageStreams: [],
presentationTimeline: timeline,
minBufferTime: 10,
offlineSessionIds: [],
sequenceMode: false,
ignoreManifestTimestampsInSegmentsMode: false,
type: 'UNKNOWN',
};
config = shaka.util.PlayerConfiguration.createDefault().streaming;
});
afterEach(() => {
playhead.release();
});
function setMockDate(seconds) {
const minutes = Math.floor(seconds / 60);
seconds %= 60;
const mockDate = new Date(2013, 9, 23, 7, minutes, seconds);
jasmine.clock().mockDate(mockDate);
}
describe('getTime', () => {
it('returns current time when the video is paused', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
// Simulate pausing.
video.paused = true;
timeline.getSeekRangeStart.and.returnValue(10);
timeline.getSeekRangeEnd.and.returnValue(70);
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
});
it('returns the correct time when readyState starts at 0', () => {
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
expect(video.addEventListener).toHaveBeenCalledWith(
'loadedmetadata', jasmine.any(Function), jasmine.anything());
expect(video.addEventListener).not.toHaveBeenCalledWith(
'seeking', jasmine.any(Function), jasmine.anything());
expect(playhead.getTime()).toBe(5);
expect(video.currentTime).toBe(0);
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.on['loadedmetadata']();
expect(video.addEventListener).toHaveBeenCalledWith(
'seeking', jasmine.any(Function), jasmine.anything());
video.on['seeking']();
expect(playhead.getTime()).toBe(5);
expect(video.currentTime).toBe(5);
video.currentTime = 6;
expect(playhead.getTime()).toBe(6);
// getTime() should always clamp the time even if the video element
// doesn't dispatch 'seeking' events.
video.currentTime = 120;
expect(playhead.getTime()).toBe(60);
video.currentTime = 0;
expect(playhead.getTime()).toBe(5);
});
it('returns the correct time when readyState starts at 1', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
video.on['seeking']();
expect(playhead.getTime()).toBe(5);
expect(video.currentTime).toBe(5);
video.currentTime = 6;
expect(playhead.getTime()).toBe(6);
});
it('allows using startTime of 0', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(0);
timeline.getSeekRangeEnd.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 0,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
expect(playhead.getTime()).toBe(0);
});
it('bumps startTime back from duration', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
timeline.isLive.and.returnValue(false);
timeline.getSeekRangeStart.and.returnValue(0);
timeline.getSeekRangeEnd.and.returnValue(60);
timeline.getDuration.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 60,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
expect(playhead.getTime()).toBe(59); // duration - durationBackoff
expect(video.currentTime).toBe(59); // duration - durationBackoff
});
it('playback from a certain offset from live edge for live', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(0);
timeline.getSeekRangeEnd.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ -15,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
expect(playhead.getTime()).toBe(45);
});
it('playback from segment seek range start time', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(30);
timeline.getSeekRangeEnd.and.returnValue(60);
// If the live stream's playback offset time is not available, start
// playing from the seek range start time.
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ -40,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
expect(playhead.getTime()).toBe(30);
});
it('does not change currentTime if it\'s not 0', () => {
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
expect(video.addEventListener).toHaveBeenCalledWith(
'loadedmetadata', jasmine.any(Function), jasmine.anything());
expect(playhead.getTime()).toBe(5);
expect(video.currentTime).toBe(0);
video.currentTime = 8;
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.on['loadedmetadata']();
// Delay to let Playhead batch up changes to currentTime and observe.
jasmine.clock().tick(1000);
expect(video.currentTime).toBe(8);
});
// This is important for recovering from drift.
// See: https://github.com/shaka-project/shaka-player/issues/1105
// TODO: Re-evaluate after https://github.com/shaka-project/shaka-player/issues/999
it('does not change once the initial position is set', () => {
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(0);
timeline.getSeekRangeEnd.and.returnValue(60);
timeline.getSeekRangeEnd.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ null,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
expect(video.addEventListener).toHaveBeenCalledWith(
'loadedmetadata', jasmine.any(Function), jasmine.anything());
expect(playhead.getTime()).toBe(60);
expect(video.currentTime).toBe(0);
// Simulate time passing and the live edge changing.
timeline.getSeekRangeStart.and.returnValue(10);
timeline.getSeekRangeEnd.and.returnValue(70);
timeline.getSeekRangeEnd.and.returnValue(70);
expect(playhead.getTime()).toBe(60);
});
}); // getTime
it('clamps playhead after seeking for live', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.buffered = createFakeBuffered([{start: 25, end: 55}]);
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
// This has to periodically increment the mock date to allow the onSeeking_
// handler to seek, if appropriate.
// Calling on['seeking']() is like dispatching a 'seeking' event. So, each
// time we change the video's current time or Playhead changes the video's
// current time we must call on['seeking'](),
setMockDate(0);
video.on['seeking']();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
// safe = start + rebufferingGoal = 5 + 10 = 15
// safeSeek = safeSeek + 5 = 15 + 5 = 20
// Seek in safe region & in buffered region.
setMockDate(10);
video.currentTime = 26;
video.on['seeking']();
expect(video.currentTime).toBe(26);
expect(playhead.getTime()).toBe(26);
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek in safe region & in unbuffered region.
setMockDate(20);
video.currentTime = 24;
video.on['seeking']();
expect(video.currentTime).toBe(24);
expect(playhead.getTime()).toBe(24);
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek before start, start is unbuffered.
setMockDate(30);
video.currentTime = 1;
video.on['seeking']();
expect(video.currentTime).toBe(20);
expect(playhead.getTime()).toBe(20);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(40);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
video.buffered = createFakeBuffered([{start: 10, end: 40}]);
// Seek outside safe region & in buffered region.
setMockDate(50);
video.currentTime = 11;
video.on['seeking']();
expect(video.currentTime).toBe(11);
expect(playhead.getTime()).toBe(11);
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek outside safe region & in unbuffered region.
setMockDate(60);
video.currentTime = 9;
video.on['seeking']();
expect(video.currentTime).toBe(20);
expect(playhead.getTime()).toBe(20);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(70);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek past end.
setMockDate(80);
video.currentTime = 120;
video.on['seeking']();
expect(video.currentTime).toBe(60);
expect(playhead.getTime()).toBe(60);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(90);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek before start, start is buffered.
setMockDate(100);
video.currentTime = 1;
video.on['seeking']();
expect(video.currentTime).toBe(10);
expect(playhead.getTime()).toBe(10);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(110);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek with safe == end
timeline.getSeekRangeEnd.and.returnValue(12);
timeline.getSafeSeekRangeStart.and.returnValue(12);
// Seek before start
setMockDate(120);
video.currentTime = 4;
video.on['seeking']();
expect(video.currentTime).toBe(12);
expect(playhead.getTime()).toBe(12);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(130);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek in window.
setMockDate(140);
video.currentTime = 8;
video.on['seeking']();
expect(video.currentTime).toBe(12);
expect(playhead.getTime()).toBe(12);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(150);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek past end.
setMockDate(160);
video.currentTime = 13;
video.on['seeking']();
expect(video.currentTime).toBe(12);
expect(playhead.getTime()).toBe(12);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(170);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
}); // clamps playhead after seeking for live
it('clamps playhead after seeking for VOD', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.buffered = createFakeBuffered([{start: 25, end: 55}]);
timeline.isLive.and.returnValue(false);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSafeSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
timeline.getDuration.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
setMockDate(0);
video.on['seeking']();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
// Seek past end.
setMockDate(10);
video.currentTime = 120;
video.on['seeking']();
expect(video.currentTime).toBe(59); // duration - durationBackoff
expect(playhead.getTime()).toBe(59); // duration - durationBackoff
expect(onSeek).not.toHaveBeenCalled();
setMockDate(20);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Seek before start.
setMockDate(30);
video.currentTime = 1;
video.on['seeking']();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
expect(onSeek).not.toHaveBeenCalled();
setMockDate(40);
video.on['seeking']();
expect(onSeek).toHaveBeenCalled();
}); // clamps playhead after seeking for VOD
it('doesn\'t repeatedly re-seek', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.buffered = createFakeBuffered([{start: 25, end: 55}]);
timeline.isLive.and.returnValue(false);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSafeSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
timeline.getDuration.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
// First, seek to start time.
video.currentTime = 0;
video.on['seeking']();
// The first time, it should re-seek without issue.
setMockDate(0);
video.currentTime = 0;
video.on['seeking']();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
expect(onSeek).not.toHaveBeenCalled();
onSeek.calls.reset();
// No time passes, so it shouldn't be willing to re-seek.
video.currentTime = 0;
video.on['seeking']();
expect(video.currentTime).toBe(0);
// The playhead wanted to seek ahead to 5, but was unable to.
expect(playhead.getTime()).toBe(5);
expect(onSeek).toHaveBeenCalled();
onSeek.calls.reset();
// Wait 10 seconds, so it should be willing to re-seek.
setMockDate(10);
video.currentTime = 0;
video.on['seeking']();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
expect(onSeek).not.toHaveBeenCalled();
}); // doesn't repeatedly re-seek
it('handles live manifests with no seek range', () => {
video.buffered = createFakeBuffered([{start: 1000, end: 1030}]);
video.readyState = HTMLMediaElement.HAVE_METADATA;
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(1000);
timeline.getSeekRangeEnd.and.returnValue(1000);
let currentTime = 0;
let seekCount = 0;
Object.defineProperty(video, 'currentTime', {
get: () => currentTime,
set: (val) => {
currentTime = val;
seekCount++;
setTimeout(video.on['seeking'], 5);
},
});
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
expect(currentTime).toBe(1000);
seekCount = 0;
playhead.ready();
// The availability window slips ahead.
timeline.getSeekRangeStart.and.returnValue(1030);
timeline.getSeekRangeEnd.and.returnValue(1030);
video.on['waiting']();
jasmine.clock().tick(500);
expect(currentTime).toBe(1030);
expect(seekCount).toBe(1);
// It should allow a small buffer around the seek range.
seekCount = 0;
currentTime = 1030.062441;
jasmine.clock().tick(500);
currentTime = 1027.9233;
jasmine.clock().tick(500);
expect(seekCount).toBe(0);
// Got too far away.
currentTime = 1026;
jasmine.clock().tick(500);
expect(currentTime).toBe(1030);
expect(seekCount).toBe(1);
}); // handles live manifests with no seek range
describe('clamps playhead after resuming', () => {
beforeEach(() => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.buffered = createFakeBuffered([{start: 5, end: 35}]);
});
it('(live case)', () => {
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
video.on['seeking']();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
// Simulate pausing.
timeline.getSeekRangeStart.and.returnValue(10);
timeline.getSeekRangeEnd.and.returnValue(70);
// Because this is buffered, the playhead should move to (start + 5),
// which will cause a 'seeking' event.
jasmine.clock().tick(500);
expect(video.currentTime).toBe(15);
video.on['seeking']();
expect(playhead.getTime()).toBe(15);
expect(onSeek).toHaveBeenCalled();
});
it('(VOD case)', () => {
timeline.isLive.and.returnValue(false);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSafeSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
timeline.getDuration.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 5,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
video.on['seeking']();
expect(video.currentTime).toBe(5);
expect(playhead.getTime()).toBe(5);
// Simulate pausing.
timeline.getSeekRangeStart.and.returnValue(10);
timeline.getSafeSeekRangeStart.and.returnValue(10);
timeline.getSeekRangeEnd.and.returnValue(70);
jasmine.clock().tick(500);
expect(video.currentTime).toBe(10);
video.on['seeking']();
expect(playhead.getTime()).toBe(10);
expect(onSeek).toHaveBeenCalled();
});
}); // clamps playhead after resuming
it('clamps playhead even before seeking completes', () => {
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.buffered = createFakeBuffered([{start: 25, end: 55}]);
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 30,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
video.currentTime = 0;
video.seeking = true;
playhead.ready();
// "video.seeking" stays true until the buffered range intersects with
// "video.currentTime". Playhead should correct anyway.
video.on['seeking']();
// Let the Playhead poll the seek range and push us back inside it.
jasmine.clock().tick(1000);
// There is some "safety zone" at the front of the range, so we may seek to
// anything >= the seek range start (5).
expect(video.currentTime).not.toBeLessThan(5);
expect(playhead.getTime()).not.toBeLessThan(5);
}); // clamps playhead even before seeking completes
// Regression test for:
// - https://github.com/shaka-project/shaka-player/pull/2849
// - https://github.com/shaka-project/shaka-player/issues/2748
// - https://github.com/shaka-project/shaka-player/issues/2848
it('does not apply seek range before initial seek has completed', () => {
// These attributes allow the seek range callback to do its thing.
video.readyState = HTMLMediaElement.HAVE_METADATA;
video.paused = false;
// Simulate a smart TV in which seeking is not immediately reflected.
// In these scenarios, currentTime remains 0 long enough for the seek range
// polling to kick in.
const currentTimeSetterSpy = jasmine.createSpy('currentTimeSetter');
Object.defineProperty(video, 'currentTime', {
get: () => 0,
set: Util.spyFunc(currentTimeSetterSpy),
});
timeline.isLive.and.returnValue(true);
timeline.getDuration.and.returnValue(Infinity);
timeline.getSeekRangeStart.and.returnValue(5);
timeline.getSeekRangeEnd.and.returnValue(60);
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ 30,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
/**
* Prevent retries on the initial start time seek. This will ensure that
* only one call is made for the initial seek, and that any additional calls
* can be rightly attributed to the application of the seek range.
* @suppress {accessControls}
*/
function stopRetries() {
const mediaSourcePlayhead =
/** @type {shaka.media.MediaSourcePlayhead} */(playhead);
mediaSourcePlayhead.videoWrapper_.mover_.timer_.stop();
mediaSourcePlayhead.videoWrapper_.mover_.maxAttempts_ = 1;
mediaSourcePlayhead.videoWrapper_.mover_.remainingAttempts_ = 1;
}
stopRetries();
// Let the Playhead poll the seek range. It should NOT push us back inside
// it, since the start time should be used instead of the current time.
jasmine.clock().tick(1000);
// The one and only call was for the initial seek to the start time.
expect(currentTimeSetterSpy).toHaveBeenCalledTimes(1);
}); // does not apply seek range before initial seek has completed
describe('gap jumping', () => {
beforeEach(() => {
timeline.isLive.and.returnValue(false);
timeline.getSafeSeekRangeStart.and.returnValue(0);
timeline.getSeekRangeStart.and.returnValue(0);
timeline.getSeekRangeEnd.and.returnValue(60);
timeline.getDuration.and.returnValue(60);
});
describe('when playing', () => {
describe('with small gaps', () => {
playingTest('won\'t jump at end of single region', {
buffered: [{start: 0, end: 10}],
start: 3,
waitingAt: 10,
expectEvent: false,
expectedEndTime: 10,
});
playingTest('won\'t jump at end of multiple regions', {
buffered: [{start: 0, end: 10}, {start: 20, end: 30}],
start: 24,
waitingAt: 30,
expectEvent: false,
expectedEndTime: 30,
});
playingTest('will jump small gap', {
buffered: [{start: 0, end: 10}, {start: 11, end: 20}],
start: 5,
waitingAt: 10,
expectEvent: true,
expectedEndTime: 11,
});
playingTest('won\'t skip a buffered range', {
buffered:
[{start: 0, end: 10}, {start: 11, end: 20}, {start: 21, end: 30}],
start: 5,
waitingAt: 10,
expectEvent: true,
expectedEndTime: 11,
});
playingTest('will jump gap into last buffer', {
buffered:
[{start: 0, end: 10}, {start: 11, end: 20}, {start: 21, end: 30}],
start: 15,
waitingAt: 20,
expectEvent: true,
expectedEndTime: 21,
});
}); // with small gaps
describe('with large gaps', () => {
playingTest('will jump large gaps if set', {
buffered: [{start: 0, end: 10}, {start: 30, end: 40}],
start: 5,
waitingAt: 10,
expectEvent: true,
expectedEndTime: 30,
});
playingTest('will only jump one buffer', {
buffered:
[{start: 0, end: 10}, {start: 30, end: 40}, {start: 50, end: 60}],
start: 5,
waitingAt: 10,
expectEvent: true,
expectedEndTime: 30,
});
playingTest('will jump into last buffer', {
buffered:
[{start: 0, end: 10}, {start: 20, end: 30}, {start: 50, end: 60}],
start: 24,
waitingAt: 30,
expectEvent: true,
expectedEndTime: 50,
});
}); // with large gaps
/**
* @param {string} name
* @param {PlayingTestInfo} data
*/
function playingTest(name, data) {
it(name, () => {
video.buffered = createFakeBuffered(data.buffered);
video.currentTime = data.start;
video.readyState = HTMLMediaElement.HAVE_ENOUGH_DATA;
onEvent.and.callFake((event) => {});
playhead = new shaka.media.MediaSourcePlayhead(
video,
manifest,
config,
/* startTime= */ data.start,
Util.spyFunc(onSeek),
Util.spyFunc(onEvent));
playhead.ready();
jasmine.clock().tick(500);
for (let time = data.start; time < data.waitingAt; time++) {
// We don't want to run tick() for 1 second because it will trigger
// the stall-detection, which will move the playhead; on the other
// hand, we don't want to be 0.5 seconds from the gap because on
// Edge/Tizen, gap jumping will treat that as in the gap.
// See shaka.media.TimeRangesUtils.getGapIndex.
video.currentTime = time;
jasmine.clock().tick(400);
// Make sure Playhead didn't adjust the time yet.
expect(video.currentTime).toBe(time);
video.currentTime = time + 0.4;
jasmine.clock().tick(600);
// Make sure Playhead didn't adjust the time yet.
expect(video.currentTime).toBe(time + 0.4);
}
expect(onEvent).not.toHaveBeenCalled();
video.currentTime = data.waitingAt;
video.readyState = HTMLMediaElement.HAVE_CURRENT_DATA;
video.on['waiting']();
jasmine.clock().tick(500);
expect(onEvent).toHaveBeenCalledTimes(data.expectEvent ? 1 : 0);
expect(video.currentTime).toBe(data.expectedEndTime);
});
}
}); // when playing
describe('with buffered seeks', () => {
describe('with small gaps', () => {