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Add new workaround for improving skipping precision on Firefox

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Ajay
2022-11-26 03:38:48 -05:00
parent 43c30bb03d
commit 5925d45f74
1 changed files with 76 additions and 23 deletions
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99
src/content.ts
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@@ -71,12 +71,14 @@ let channelIDInfo: ChannelIDInfo;
// Locked Categories in this tab, like: ["sponsor","intro","outro"]
let lockedCategories: Category[] = [];
// Used to calculate a more precise "virtual" video time
let lastKnownVideoTime: { videoTime: number; preciseTime: number } = {
const lastKnownVideoTime: { videoTime: number; preciseTime: number; fromPause: boolean; approximateDelay: number } = {
videoTime: null,
preciseTime: null
preciseTime: null,
fromPause: false,
approximateDelay: null,
};
// It resumes with a slightly later time on chromium
let lastTimeFromWaitingEvent = null;
let lastTimeFromWaitingEvent: number = null;
const lastNextChapterKeybind = {
time: 0,
date: 0
@@ -87,6 +89,7 @@ const lastNextChapterKeybind = {
// Skips are canceled every seeking event
let currentSkipSchedule: NodeJS.Timeout = null;
let currentSkipInterval: NodeJS.Timeout = null;
let currentVirtualTimeInterval: NodeJS.Timeout = null;
/** Has the sponsor been skipped */
let sponsorSkipped: boolean[] = [];
@@ -600,6 +603,7 @@ function startSponsorSchedule(includeIntersectingSegments = false, currentTime?:
if (currentTime === undefined || currentTime === null) {
currentTime = getVirtualTime();
}
clearWaitingTime();
lastTimeFromWaitingEvent = null;
updateActiveSegment(currentTime);
@@ -704,11 +708,23 @@ function startSponsorSchedule(includeIntersectingSegments = false, currentTime?:
// Use interval instead of timeout near the end to combat imprecise video time
const startIntervalTime = performance.now();
const startVideoTime = Math.max(currentTime, video.currentTime);
let startWaitingForReportedTimeToChange = true;
const reportedVideoTimeAtStart = video.currentTime;
logDebug(`Starting setInterval skipping ${video.currentTime} to skip at ${skipTime[0]}`);
currentSkipInterval = setInterval(() => {
// Estimate delay, but only take the current time right after a change
// Current time remains the same for many "frames" on Firefox
if (utils.isFirefox() && !lastKnownVideoTime.fromPause && startWaitingForReportedTimeToChange
&& reportedVideoTimeAtStart !== video.currentTime) {
startWaitingForReportedTimeToChange = false;
const delay = getVirtualTime() - video.currentTime;
if (delay > 0) lastKnownVideoTime.approximateDelay = delay;
}
const intervalDuration = performance.now() - startIntervalTime;
if (intervalDuration >= delayTime || video.currentTime >= skipTime[0]) {
if (intervalDuration + skipBuffer * 1000 >= delayTime || video.currentTime >= skipTime[0]) {
clearInterval(currentSkipInterval);
if (!utils.isFirefox() && !video.muted) {
// Workaround for more accurate skipping on Chromium
@@ -716,7 +732,7 @@ function startSponsorSchedule(includeIntersectingSegments = false, currentTime?:
video.muted = false;
}
skippingFunction(Math.max(video.currentTime, startVideoTime + video.playbackRate * intervalDuration / 1000));
skippingFunction(Math.max(video.currentTime, startVideoTime + video.playbackRate * Math.max(delayTime, intervalDuration) / 1000));
}
}, 1);
} else {
@@ -729,11 +745,11 @@ function startSponsorSchedule(includeIntersectingSegments = false, currentTime?:
}
function getVirtualTime(): number {
const virtualTime = lastTimeFromWaitingEvent ?? (lastKnownVideoTime.videoTime ?
const virtualTime = lastTimeFromWaitingEvent ?? (lastKnownVideoTime.videoTime !== null ?
(performance.now() - lastKnownVideoTime.preciseTime) * video.playbackRate / 1000 + lastKnownVideoTime.videoTime : null);
if (Config.config.useVirtualTime && !utils.isFirefox() && !isSafari() && virtualTime
&& Math.abs(virtualTime - video.currentTime) < 0.6 && video.currentTime !== 0) {
if (Config.config.useVirtualTime && !isSafari() && virtualTime
&& Math.abs(virtualTime - video.currentTime) < 0.2 && video.currentTime !== 0) {
return virtualTime;
} else {
return video.currentTime;
@@ -878,13 +894,15 @@ function setupVideoListeners() {
}
});
video.addEventListener('seeking', () => {
lastKnownVideoTime.fromPause = false;
if (!video.paused){
// Reset lastCheckVideoTime
lastCheckTime = Date.now();
lastCheckVideoTime = video.currentTime;
updateVirtualTime();
lastTimeFromWaitingEvent = null;
clearWaitingTime();
startSponsorSchedule();
} else {
@@ -897,36 +915,38 @@ function setupVideoListeners() {
});
video.addEventListener('ratechange', () => {
updateVirtualTime();
lastTimeFromWaitingEvent = null;
clearWaitingTime();
startSponsorSchedule();
});
// Used by videospeed extension (https://github.com/igrigorik/videospeed/pull/740)
video.addEventListener('videoSpeed_ratechange', () => {
updateVirtualTime();
lastTimeFromWaitingEvent = null;
clearWaitingTime();
startSponsorSchedule();
});
const paused = () => {
const stoppedPlayback = () => {
// Reset lastCheckVideoTime
lastCheckVideoTime = -1;
lastCheckTime = 0;
lastKnownVideoTime = {
videoTime: null,
preciseTime: null
}
lastTimeFromWaitingEvent = video.currentTime;
lastKnownVideoTime.videoTime = null;
lastKnownVideoTime.preciseTime = null;
updateWaitingTime();
cancelSponsorSchedule();
};
video.addEventListener('pause', () => paused());
video.addEventListener('pause', () => {
lastKnownVideoTime.fromPause = true;
stoppedPlayback();
});
video.addEventListener('waiting', () => {
logDebug("[SB] Not skipping due to buffering");
startedWaiting = true;
paused();
stoppedPlayback();
});
startSponsorSchedule();
@@ -934,10 +954,43 @@ function setupVideoListeners() {
}
function updateVirtualTime() {
lastKnownVideoTime = {
videoTime: video.currentTime,
preciseTime: performance.now()
};
if (currentVirtualTimeInterval) clearInterval(currentVirtualTimeInterval);
lastKnownVideoTime.videoTime = video.currentTime;
lastKnownVideoTime.preciseTime = performance.now();
// If on Firefox, wait for the second time change (time remains fixed for many "frames" for privacy reasons)
if (utils.isFirefox()) {
let count = 0;
let lastTime = lastKnownVideoTime.videoTime;
if (lastKnownVideoTime.fromPause) {
currentVirtualTimeInterval = setInterval(() => {
if (lastTime !== video.currentTime) {
count++;
lastTime = video.currentTime;
}
if (count > 1) {
const delay = lastKnownVideoTime.fromPause && lastKnownVideoTime.approximateDelay ?
lastKnownVideoTime.approximateDelay : 0;
lastKnownVideoTime.videoTime = video.currentTime + delay;
lastKnownVideoTime.preciseTime = performance.now();
clearInterval(currentVirtualTimeInterval);
currentVirtualTimeInterval = null;
}
}, 1);
}
}
}
function updateWaitingTime(): void {
lastTimeFromWaitingEvent = video.currentTime;
}
function clearWaitingTime(): void {
lastTimeFromWaitingEvent = null;
}
function setupSkipButtonControlBar() {