Source: ui/seek_bar.js

  1. /*! @license
  2.  * Shaka Player
  3.  * Copyright 2016 Google LLC
  4.  * SPDX-License-Identifier: Apache-2.0
  5.  */
  8. goog.provide('shaka.ui.SeekBar');
  10. goog.require('shaka.ads.Utils');
  11. goog.require('shaka.net.NetworkingEngine');
  12. goog.require('shaka.ui.Constants');
  13. goog.require('shaka.ui.Locales');
  14. goog.require('shaka.ui.Localization');
  15. goog.require('shaka.ui.RangeElement');
  16. goog.require('shaka.ui.Utils');
  17. goog.require('shaka.util.Dom');
  18. goog.require('shaka.util.Error');
  19. goog.require('shaka.util.Mp4Parser');
  20. goog.require('shaka.util.Networking');
  21. goog.require('shaka.util.Timer');
  22. goog.requireType('shaka.ui.Controls');
  25. /**
  26.  * @extends {shaka.ui.RangeElement}
  27.  * @implements {shaka.extern.IUISeekBar}
  28.  * @final
  29.  * @export
  30.  */
  31. shaka.ui.SeekBar = class extends shaka.ui.RangeElement {
  32.   /**
  33.    * @param {!HTMLElement} parent
  34.    * @param {!shaka.ui.Controls} controls
  35.    */
  36.   constructor(parent, controls) {
  37.     super(parent, controls,
  38.         [
  39.           'shaka-seek-bar-container',
  40.         ],
  41.         [
  42.           'shaka-seek-bar',
  43.           'shaka-no-propagation',
  44.           'shaka-show-controls-on-mouse-over',
  45.         ]);
  47.     /** @private {!HTMLElement} */
  48.     this.adMarkerContainer_ = shaka.util.Dom.createHTMLElement('div');
  49.     this.adMarkerContainer_.classList.add('shaka-ad-markers');
  50.     // Insert the ad markers container as a first child for proper
  51.     // positioning.
  52.     this.container.insertBefore(
  53.         this.adMarkerContainer_, this.container.childNodes[0]);
  56.     /** @private {!shaka.extern.UIConfiguration} */
  57.     this.config_ = this.controls.getConfig();
  59.     /**
  60.      * This timer is used to introduce a delay between the user scrubbing across
  61.      * the seek bar and the seek being sent to the player.
  62.      *
  63.      * @private {shaka.util.Timer}
  64.      */
  65.     this.seekTimer_ = new shaka.util.Timer(() => {
  66.       let newCurrentTime = this.getValue();
  67.       if (!this.player.isLive()) {
  68.         if (newCurrentTime == this.video.duration) {
  69.           newCurrentTime -= 0.001;
  70.         }
  71.       }
  72.       this.video.currentTime = newCurrentTime;
  73.     });
  76.     /**
  77.      * The timer is activated for live content and checks if
  78.      * new ad breaks need to be marked in the current seek range.
  79.      *
  80.      * @private {shaka.util.Timer}
  81.      */
  82.     this.adBreaksTimer_ = new shaka.util.Timer(() => {
  83.       this.markAdBreaks_();
  84.     });
  87.     /**
  88.      * When user is scrubbing the seek bar - we should pause the video - see
  89.      * https://github.com/google/shaka-player/pull/2898#issuecomment-705229215
  90.      * but will conditionally pause or play the video after scrubbing
  91.      * depending on its previous state
  92.      *
  93.      * @private {boolean}
  94.      */
  95.     this.wasPlaying_ = false;
  98.     /** @private {!HTMLElement} */
  99.     this.thumbnailContainer_ = shaka.util.Dom.createHTMLElement('div');
  100.     this.thumbnailContainer_.id = 'shaka-player-ui-thumbnail-container';
  102.     /** @private {!HTMLImageElement} */
  103.     this.thumbnailImage_ = /** @type {!HTMLImageElement} */ (
  104.       shaka.util.Dom.createHTMLElement('img'));
  105.     this.thumbnailImage_.id = 'shaka-player-ui-thumbnail-image';
  106.     this.thumbnailImage_.draggable = false;
  108.     /** @private {!HTMLElement} */
  109.     this.thumbnailTime_ = shaka.util.Dom.createHTMLElement('div');
  110.     this.thumbnailTime_.id = 'shaka-player-ui-thumbnail-time';
  112.     this.thumbnailContainer_.appendChild(this.thumbnailImage_);
  113.     this.thumbnailContainer_.appendChild(this.thumbnailTime_);
  114.     this.container.appendChild(this.thumbnailContainer_);
  116.     this.timeContainer_ = shaka.util.Dom.createHTMLElement('div');
  117.     this.timeContainer_.id = 'shaka-player-ui-time-container';
  118.     this.container.appendChild(this.timeContainer_);
  120.     /**
  121.      * @private {?shaka.extern.Thumbnail}
  122.      */
  123.     this.lastThumbnail_ = null;
  125.     /**
  126.      * @private {?shaka.net.NetworkingEngine.PendingRequest}
  127.      */
  128.     this.lastThumbnailPendingRequest_ = null;
  130.     /**
  131.      * True if the bar is moving due to touchscreen or keyboard events.
  132.      *
  133.      * @private {boolean}
  134.      */
  135.     this.isMoving_ = false;
  137.     /**
  138.      * The timer is activated to hide the thumbnail.
  139.      *
  140.      * @private {shaka.util.Timer}
  141.      */
  142.     this.hideThumbnailTimer_ = new shaka.util.Timer(() => {
  143.       this.hideThumbnail_();
  144.     });
  146.     /** @private {!Array.<!shaka.extern.AdCuePoint>} */
  147.     this.adCuePoints_ = [];
  149.     this.eventManager.listen(this.localization,
  150.         shaka.ui.Localization.LOCALE_UPDATED,
  151.         () => this.updateAriaLabel_());
  153.     this.eventManager.listen(this.localization,
  154.         shaka.ui.Localization.LOCALE_CHANGED,
  155.         () => this.updateAriaLabel_());
  157.     this.eventManager.listen(
  158.         this.adManager, shaka.ads.Utils.AD_STARTED, () => {
  159.           if (!this.shouldBeDisplayed_()) {
  160.             shaka.ui.Utils.setDisplay(this.container, false);
  161.           }
  162.         });
  164.     this.eventManager.listen(
  165.         this.adManager, shaka.ads.Utils.AD_STOPPED, () => {
  166.           if (this.shouldBeDisplayed_()) {
  167.             shaka.ui.Utils.setDisplay(this.container, true);
  168.           }
  169.         });
  171.     this.eventManager.listen(
  172.         this.adManager, shaka.ads.Utils.CUEPOINTS_CHANGED, (e) => {
  173.           this.adCuePoints_ = (e)['cuepoints'];
  174.           this.onAdCuePointsChanged_();
  175.         });
  177.     this.eventManager.listen(
  178.         this.player, 'unloading', () => {
  179.           this.adCuePoints_ = [];
  180.           this.onAdCuePointsChanged_();
  181.           if (this.lastThumbnailPendingRequest_) {
  182.             this.lastThumbnailPendingRequest_.abort();
  183.             this.lastThumbnailPendingRequest_ = null;
  184.           }
  185.           this.lastThumbnail_ = null;
  186.           this.hideThumbnail_();
  187.           this.hideTime_();
  188.         });
  190.     this.eventManager.listen(this.bar, 'mousemove', (event) => {
  191.       const rect = this.bar.getBoundingClientRect();
  192.       const min = parseFloat(this.bar.min);
  193.       const max = parseFloat(this.bar.max);
  194.       // Pixels from the left of the range element
  195.       const mousePosition = event.clientX - rect.left;
  196.       // Pixels per unit value of the range element.
  197.       const scale = (max - min) / rect.width;
  198.       // Mouse position in units, which may be outside the allowed range.
  199.       const value = Math.round(min + scale * mousePosition);
  200.       if (!this.player.getImageTracks().length) {
  201.         this.hideThumbnail_();
  202.         this.showTime_(mousePosition, value);
  203.         return;
  204.       }
  205.       this.hideTime_();
  206.       this.showThumbnail_(mousePosition, value);
  207.     });
  209.     this.eventManager.listen(this.container, 'mouseleave', () => {
  210.       this.hideTime_();
  211.       this.hideThumbnailTimer_.stop();
  212.       this.hideThumbnailTimer_.tickAfter(/* seconds= */ 0.25);
  213.     });
  215.     // Initialize seek state and label.
  216.     this.setValue(this.video.currentTime);
  217.     this.update();
  218.     this.updateAriaLabel_();
  220.     if (this.ad) {
  221.       // There was already an ad.
  222.       shaka.ui.Utils.setDisplay(this.container, false);
  223.     }
  224.   }
  226.   /** @override */
  227.   release() {
  228.     if (this.seekTimer_) {
  229.       this.seekTimer_.stop();
  230.       this.seekTimer_ = null;
  231.       this.adBreaksTimer_.stop();
  232.       this.adBreaksTimer_ = null;
  233.     }
  235.     super.release();
  236.   }
  238.   /**
  239.    * Called by the base class when user interaction with the input element
  240.    * begins.
  241.    *
  242.    * @override
  243.    */
  244.   onChangeStart() {
  245.     this.wasPlaying_ = !this.video.paused;
  246.     this.controls.setSeeking(true);
  247.     this.video.pause();
  248.     this.hideThumbnailTimer_.stop();
  249.     this.isMoving_ = true;
  250.   }
  252.   /**
  253.    * Update the video element's state to match the input element's state.
  254.    * Called by the base class when the input element changes.
  255.    *
  256.    * @override
  257.    */
  258.   onChange() {
  259.     if (!this.video.duration) {
  260.       // Can't seek yet.  Ignore.
  261.       return;
  262.     }
  264.     // Update the UI right away.
  265.     this.update();
  267.     // We want to wait until the user has stopped moving the seek bar for a
  268.     // little bit to reduce the number of times we ask the player to seek.
  269.     //
  270.     // To do this, we will start a timer that will fire in a little bit, but if
  271.     // we see another seek bar change, we will cancel that timer and re-start
  272.     // it.
  273.     //
  274.     // Calling |start| on an already pending timer will cancel the old request
  275.     // and start the new one.
  276.     this.seekTimer_.tickAfter(/* seconds= */ 0.125);
  278.     if (this.player.getImageTracks().length) {
  279.       const min = parseFloat(this.bar.min);
  280.       const max = parseFloat(this.bar.max);
  281.       const rect = this.bar.getBoundingClientRect();
  282.       const value = Math.round(this.getValue());
  283.       const scale = (max - min) / rect.width;
  284.       const position = (value - min) / scale;
  285.       this.showThumbnail_(position, value);
  286.     } else {
  287.       this.hideThumbnail_();
  288.     }
  289.   }
  291.   /**
  292.    * Called by the base class when user interaction with the input element
  293.    * ends.
  294.    *
  295.    * @override
  296.    */
  297.   onChangeEnd() {
  298.     // They just let go of the seek bar, so cancel the timer and manually
  299.     // call the event so that we can respond immediately.
  300.     this.seekTimer_.tickNow();
  301.     this.controls.setSeeking(false);
  303.     if (this.wasPlaying_) {
  304.       this.video.play();
  305.     }
  307.     if (this.isMoving_) {
  308.       this.isMoving_ = false;
  309.       this.hideThumbnailTimer_.stop();
  310.       this.hideThumbnailTimer_.tickAfter(/* seconds= */ 0.25);
  311.     }
  312.   }
  314.   /**
  315.    * @override
  316.   */
  317.   isShowing() {
  318.     // It is showing by default, so it is hidden if shaka-hidden is in the list.
  319.     return !this.container.classList.contains('shaka-hidden');
  320.   }
  322.   /**
  323.    * @override
  324.    */
  325.   update() {
  326.     const colors = this.config_.seekBarColors;
  327.     const currentTime = this.getValue();
  328.     const bufferedLength = this.video.buffered.length;
  329.     const bufferedStart = bufferedLength ? this.video.buffered.start(0) : 0;
  330.     const bufferedEnd =
  331.         bufferedLength ? this.video.buffered.end(bufferedLength - 1) : 0;
  333.     const seekRange = this.player.seekRange();
  334.     const seekRangeSize = seekRange.end - seekRange.start;
  336.     this.setRange(seekRange.start, seekRange.end);
  338.     if (!this.shouldBeDisplayed_()) {
  339.       shaka.ui.Utils.setDisplay(this.container, false);
  340.     } else {
  341.       shaka.ui.Utils.setDisplay(this.container, true);
  343.       if (bufferedLength == 0) {
  344.         this.container.style.background = colors.base;
  345.       } else {
  346.         const clampedBufferStart = Math.max(bufferedStart, seekRange.start);
  347.         const clampedBufferEnd = Math.min(bufferedEnd, seekRange.end);
  348.         const clampedCurrentTime = Math.min(
  349.             Math.max(currentTime, seekRange.start),
  350.             seekRange.end);
  352.         const bufferStartDistance = clampedBufferStart - seekRange.start;
  353.         const bufferEndDistance = clampedBufferEnd - seekRange.start;
  354.         const playheadDistance = clampedCurrentTime - seekRange.start;
  356.         // NOTE: the fallback to zero eliminates NaN.
  357.         const bufferStartFraction = (bufferStartDistance / seekRangeSize) || 0;
  358.         const bufferEndFraction = (bufferEndDistance / seekRangeSize) || 0;
  359.         const playheadFraction = (playheadDistance / seekRangeSize) || 0;
  361.         const unbufferedColor =
  362.             this.config_.showUnbufferedStart ? colors.base : colors.played;
  364.         const gradient = [
  365.           'to right',
  366.           this.makeColor_(unbufferedColor, bufferStartFraction),
  367.           this.makeColor_(colors.played, bufferStartFraction),
  368.           this.makeColor_(colors.played, playheadFraction),
  369.           this.makeColor_(colors.buffered, playheadFraction),
  370.           this.makeColor_(colors.buffered, bufferEndFraction),
  371.           this.makeColor_(colors.base, bufferEndFraction),
  372.         ];
  373.         this.container.style.background =
  374.             'linear-gradient(' + gradient.join(',') + ')';
  375.       }
  376.     }
  377.   }
  379.   /**
  380.    * @private
  381.    */
  382.   markAdBreaks_() {
  383.     if (!this.adCuePoints_.length) {
  384.       this.adMarkerContainer_.style.background = 'transparent';
  385.       this.adBreaksTimer_.stop();
  386.       return;
  387.     }
  389.     const seekRange = this.player.seekRange();
  390.     const seekRangeSize = seekRange.end - seekRange.start;
  391.     const gradient = ['to right'];
  392.     let pointsAsFractions = [];
  393.     const adBreakColor = this.config_.seekBarColors.adBreaks;
  394.     let postRollAd = false;
  395.     for (const point of this.adCuePoints_) {
  396.       // Post-roll ads are marked as starting at -1 in CS IMA ads.
  397.       if (point.start == -1 && !point.end) {
  398.         postRollAd = true;
  399.         continue;
  400.       }
  401.       // Filter point within the seek range. For points with no endpoint
  402.       // (client side ads) check that the start point is within range.
  403.       if ((!point.end && point.start >= seekRange.start) ||
  404.           (typeof point.end == 'number' && point.end > seekRange.start)) {
  405.         const startDist =
  406.             Math.max(point.start, seekRange.start) - seekRange.start;
  407.         const startFrac = (startDist / seekRangeSize) || 0;
  408.         // For points with no endpoint assume a 1% length: not too much,
  409.         // but enough to be visible on the timeline.
  410.         let endFrac = startFrac + 0.01;
  411.         if (point.end) {
  412.           const endDist = point.end - seekRange.start;
  413.           endFrac = (endDist / seekRangeSize) || 0;
  414.         }
  416.         pointsAsFractions.push({
  417.           start: startFrac,
  418.           end: endFrac,
  419.         });
  420.       }
  421.     }
  423.     pointsAsFractions = pointsAsFractions.sort((a, b) => {
  424.       return a.start - b.start;
  425.     });
  427.     for (const point of pointsAsFractions) {
  428.       gradient.push(this.makeColor_('transparent', point.start));
  429.       gradient.push(this.makeColor_(adBreakColor, point.start));
  430.       gradient.push(this.makeColor_(adBreakColor, point.end));
  431.       gradient.push(this.makeColor_('transparent', point.end));
  432.     }
  434.     if (postRollAd) {
  435.       gradient.push(this.makeColor_('transparent', 0.99));
  436.       gradient.push(this.makeColor_(adBreakColor, 0.99));
  437.     }
  438.     this.adMarkerContainer_.style.background =
  439.             'linear-gradient(' + gradient.join(',') + ')';
  440.   }
  443.   /**
  444.    * @param {string} color
  445.    * @param {number} fract
  446.    * @return {string}
  447.    * @private
  448.    */
  449.   makeColor_(color, fract) {
  450.     return color + ' ' + (fract * 100) + '%';
  451.   }
  454.   /**
  455.    * @private
  456.    */
  457.   onAdCuePointsChanged_() {
  458.     const action = () => {
  459.       this.markAdBreaks_();
  460.       const seekRange = this.player.seekRange();
  461.       const seekRangeSize = seekRange.end - seekRange.start;
  462.       const minSeekBarWindow =
  463.           shaka.ui.Constants.MIN_SEEK_WINDOW_TO_SHOW_SEEKBAR;
  464.       // Seek range keeps changing for live content and some of the known
  465.       // ad breaks might not be in the seek range now, but get into
  466.       // it later.
  467.       // If we have a LIVE seekable content, keep checking for ad breaks
  468.       // every second.
  469.       if (this.player.isLive() && seekRangeSize > minSeekBarWindow) {
  470.         this.adBreaksTimer_.tickEvery(/* seconds= */ 0.25);
  471.       }
  472.     };
  473.     if (this.player.isFullyLoaded()) {
  474.       action();
  475.     } else {
  476.       this.eventManager.listenOnce(this.player, 'loaded', action);
  477.     }
  478.   }
  481.   /**
  482.    * @return {boolean}
  483.    * @private
  484.    */
  485.   shouldBeDisplayed_() {
  486.     // The seek bar should be hidden when the seek window's too small or
  487.     // there's an ad playing.
  488.     const seekRange = this.player.seekRange();
  489.     const seekRangeSize = seekRange.end - seekRange.start;
  491.     if (this.player.isLive() &&
  492.         (seekRangeSize < shaka.ui.Constants.MIN_SEEK_WINDOW_TO_SHOW_SEEKBAR ||
  493.         !isFinite(seekRangeSize))) {
  494.       return false;
  495.     }
  497.     return this.ad == null || !this.ad.isLinear();
  498.   }
  500.   /** @private */
  501.   updateAriaLabel_() {
  502.     this.bar.ariaLabel = this.localization.resolve(shaka.ui.Locales.Ids.SEEK);
  503.   }
  505.   /** @private */
  506.   showTime_(pixelPosition, value) {
  507.     const offsetTop = -10;
  508.     const width = this.timeContainer_.clientWidth;
  509.     const height = 20;
  510.     this.timeContainer_.style.width = 'auto';
  511.     this.timeContainer_.style.height = height + 'px';
  512.     this.timeContainer_.style.top = -(height - offsetTop) + 'px';
  513.     const leftPosition = Math.min(this.bar.offsetWidth - width,
  514.         Math.max(0, pixelPosition - (width / 2)));
  515.     this.timeContainer_.style.left = leftPosition + 'px';
  516.     this.timeContainer_.style.visibility = 'visible';
  517.     const seekRange = this.player.seekRange();
  518.     if (this.player.isLive()) {
  519.       const totalSeconds = seekRange.end - value;
  520.       if (totalSeconds < 1) {
  521.         this.timeContainer_.textContent =
  522.             this.localization.resolve(shaka.ui.Locales.Ids.LIVE);
  523.       } else {
  524.         this.timeContainer_.textContent =
  525.             '-' + this.timeFormatter_(totalSeconds);
  526.       }
  527.     } else {
  528.       const totalSeconds = value - seekRange.start;
  529.       this.timeContainer_.textContent = this.timeFormatter_(totalSeconds);
  530.     }
  531.   }
  534.   /**
  535.    * @private
  536.    */
  537.   async showThumbnail_(pixelPosition, value) {
  538.     const thumbnailTrack = this.getThumbnailTrack_();
  539.     if (!thumbnailTrack) {
  540.       this.hideThumbnail_();
  541.       return;
  542.     }
  543.     if (value < 0) {
  544.       value = 0;
  545.     }
  546.     const seekRange = this.player.seekRange();
  547.     const playerValue = Math.max(Math.ceil(seekRange.start),
  548.         Math.min(Math.floor(seekRange.end), value));
  549.     const thumbnail =
  550.         await this.player.getThumbnails(thumbnailTrack.id, playerValue);
  551.     if (!thumbnail || !thumbnail.uris.length) {
  552.       this.hideThumbnail_();
  553.       return;
  554.     }
  555.     if (this.player.isLive()) {
  556.       const totalSeconds = seekRange.end - value;
  557.       if (totalSeconds < 1) {
  558.         this.thumbnailTime_.textContent =
  559.             this.localization.resolve(shaka.ui.Locales.Ids.LIVE);
  560.       } else {
  561.         this.thumbnailTime_.textContent =
  562.             '-' + this.timeFormatter_(totalSeconds);
  563.       }
  564.     } else {
  565.       this.thumbnailTime_.textContent = this.timeFormatter_(value);
  566.     }
  567.     const offsetTop = -10;
  568.     const width = this.thumbnailContainer_.clientWidth;
  569.     let height = Math.floor(width * 9 / 16);
  570.     this.thumbnailContainer_.style.height = height + 'px';
  571.     this.thumbnailContainer_.style.top = -(height - offsetTop) + 'px';
  572.     const leftPosition = Math.min(this.bar.offsetWidth - width,
  573.         Math.max(0, pixelPosition - (width / 2)));
  574.     this.thumbnailContainer_.style.left = leftPosition + 'px';
  575.     this.thumbnailContainer_.style.visibility = 'visible';
  576.     let uri = thumbnail.uris[0].split('#xywh=')[0];
  577.     if (!this.lastThumbnail_ ||
  578.         uri !== this.lastThumbnail_.uris[0].split('#xywh=')[0] ||
  579.         thumbnail.segment.getStartByte() !=
  580.             this.lastThumbnail_.segment.getStartByte() ||
  581.         thumbnail.segment.getEndByte() !=
  582.             this.lastThumbnail_.segment.getEndByte()) {
  583.       this.lastThumbnail_ = thumbnail;
  584.       if (this.lastThumbnailPendingRequest_) {
  585.         this.lastThumbnailPendingRequest_.abort();
  586.         this.lastThumbnailPendingRequest_ = null;
  587.       }
  588.       if (thumbnailTrack.codecs == 'mjpg' || uri.startsWith('offline:')) {
  589.         this.thumbnailImage_.src = shaka.ui.SeekBar.Transparent_Image_;
  590.         try {
  591.           const requestType = shaka.net.NetworkingEngine.RequestType.SEGMENT;
  592.           const type =
  593.               shaka.net.NetworkingEngine.AdvancedRequestType.MEDIA_SEGMENT;
  594.           const request = shaka.util.Networking.createSegmentRequest(
  595.               thumbnail.segment.getUris(),
  596.               thumbnail.segment.getStartByte(),
  597.               thumbnail.segment.getEndByte(),
  598.               this.player.getConfiguration().streaming.retryParameters);
  599.           this.lastThumbnailPendingRequest_ = this.player.getNetworkingEngine()
  600.               .request(requestType, request, {type});
  601.           const response = await this.lastThumbnailPendingRequest_.promise;
  602.           this.lastThumbnailPendingRequest_ = null;
  603.           if (thumbnailTrack.codecs == 'mjpg') {
  604.             const parser = new shaka.util.Mp4Parser()
  605.                 .box('mdat', shaka.util.Mp4Parser.allData((data) => {
  606.                   const blob = new Blob([data], {type: 'image/jpeg'});
  607.                   uri = URL.createObjectURL(blob);
  608.                 }));
  609.             parser.parse(response.data, /* partialOkay= */ false);
  610.           } else {
  611.             const mimeType = thumbnailTrack.mimeType || 'image/jpeg';
  612.             const blob = new Blob([response.data], {type: mimeType});
  613.             uri = URL.createObjectURL(blob);
  614.           }
  615.         } catch (error) {
  616.           if (error.code == shaka.util.Error.Code.OPERATION_ABORTED) {
  617.             return;
  618.           }
  619.           throw error;
  620.         }
  621.       }
  622.       try {
  623.         this.thumbnailContainer_.removeChild(this.thumbnailImage_);
  624.       } catch (e) {
  625.         // The image is not a child
  626.       }
  627.       this.thumbnailImage_ = /** @type {!HTMLImageElement} */ (
  628.         shaka.util.Dom.createHTMLElement('img'));
  629.       this.thumbnailImage_.id = 'shaka-player-ui-thumbnail-image';
  630.       this.thumbnailImage_.draggable = false;
  631.       this.thumbnailImage_.src = uri;
  632.       this.thumbnailImage_.onload = () => {
  633.         if (uri.startsWith('blob:')) {
  634.           URL.revokeObjectURL(uri);
  635.         }
  636.       };
  637.       this.thumbnailContainer_.insertBefore(this.thumbnailImage_,
  638.           this.thumbnailContainer_.firstChild);
  639.     }
  640.     const scale = width / thumbnail.width;
  641.     if (thumbnail.imageHeight) {
  642.       this.thumbnailImage_.height = thumbnail.imageHeight;
  643.     } else if (!thumbnail.sprite) {
  644.       this.thumbnailImage_.style.height = '100%';
  645.       this.thumbnailImage_.style.objectFit = 'contain';
  646.     }
  647.     if (thumbnail.imageWidth) {
  648.       this.thumbnailImage_.width = thumbnail.imageWidth;
  649.     } else if (!thumbnail.sprite) {
  650.       this.thumbnailImage_.style.width = '100%';
  651.       this.thumbnailImage_.style.objectFit = 'contain';
  652.     }
  653.     this.thumbnailImage_.style.left = '-' + scale * thumbnail.positionX + 'px';
  654.     this.thumbnailImage_.style.top = '-' + scale * thumbnail.positionY + 'px';
  655.     this.thumbnailImage_.style.transform = 'scale(' + scale + ')';
  656.     this.thumbnailImage_.style.transformOrigin = 'left top';
  657.     // Update container height and top
  658.     height = Math.floor(width * thumbnail.height / thumbnail.width);
  659.     this.thumbnailContainer_.style.height = height + 'px';
  660.     this.thumbnailContainer_.style.top = -(height - offsetTop) + 'px';
  661.   }
  664.   /**
  665.    * @return {?shaka.extern.Track} The thumbnail track.
  666.    * @private
  667.    */
  668.   getThumbnailTrack_() {
  669.     const imageTracks = this.player.getImageTracks();
  670.     if (!imageTracks.length) {
  671.       return null;
  672.     }
  673.     const mimeTypesPreference = [
  674.       'image/avif',
  675.       'image/webp',
  676.       'image/jpeg',
  677.       'image/png',
  678.       'image/svg+xml',
  679.     ];
  680.     for (const mimeType of mimeTypesPreference) {
  681.       const estimatedBandwidth = this.player.getStats().estimatedBandwidth;
  682.       const bestOptions = imageTracks.filter((track) => {
  683.         return track.mimeType.toLowerCase() === mimeType &&
  684.             track.bandwidth < estimatedBandwidth * 0.01;
  685.       }).sort((a, b) => {
  686.         return b.bandwidth - a.bandwidth;
  687.       });
  688.       if (bestOptions && bestOptions.length) {
  689.         return bestOptions[0];
  690.       }
  691.     }
  692.     const mjpgTrack = imageTracks.find((track) => {
  693.       return track.mimeType == 'application/mp4' && track.codecs == 'mjpg';
  694.     });
  695.     return mjpgTrack || imageTracks[0];
  696.   }
  699.   /**
  700.    * @private
  701.    */
  702.   hideThumbnail_() {
  703.     this.thumbnailContainer_.style.visibility = 'hidden';
  704.     this.thumbnailTime_.textContent = '';
  705.   }
  708.   /**
  709.    * @private
  710.    */
  711.   hideTime_() {
  712.     this.timeContainer_.style.visibility = 'hidden';
  713.   }
  716.   /**
  717.    * @param {number} totalSeconds
  718.    * @private
  719.    */
  720.   timeFormatter_(totalSeconds) {
  721.     const secondsNumber = Math.round(totalSeconds);
  722.     const hours = Math.floor(secondsNumber / 3600);
  723.     let minutes = Math.floor((secondsNumber - (hours * 3600)) / 60);
  724.     let seconds = secondsNumber - (hours * 3600) - (minutes * 60);
  725.     if (seconds < 10) {
  726.       seconds = '0' + seconds;
  727.     }
  728.     if (hours > 0) {
  729.       if (minutes < 10) {
  730.         minutes = '0' + minutes;
  731.       }
  732.       return hours + ':' + minutes + ':' + seconds;
  733.     } else {
  734.       return minutes + ':' + seconds;
  735.     }
  736.   }
  737. };
  740. /**
  741.  * @const {string}
  742.  * @private
  743.  */
  744. shaka.ui.SeekBar.Transparent_Image_ =
  745.     'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"/>';
  748. /**
  749.  * @implements {shaka.extern.IUISeekBar.Factory}
  750.  * @export
  751.  */
  753. shaka.ui.SeekBar.Factory = class {
  754.   /**
  755.    * Creates a shaka.ui.SeekBar. Use this factory to register the default
  756.    * SeekBar when needed
  757.    *
  758.    * @override
  759.    */
  760.   create(rootElement, controls) {
  761.     return new shaka.ui.SeekBar(rootElement, controls);
  762.   }
  763. };