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Merge pull request #33 from organization/feature/ambient-mode
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import { BrowserWindow } from 'electron'; | ||
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import style from './style.css'; | ||
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import { injectCSS } from '../utils'; | ||
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export default (win: BrowserWindow) => { | ||
injectCSS(win.webContents, style); | ||
}; |
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import { ConfigType } from '../../config/dynamic'; | ||
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export default (_: ConfigType<'ambient-mode'>) => { | ||
const interpolationTime = 3000; // interpolation time (ms) | ||
const framerate = 30; // frame | ||
const qualityRatio = 50; // width size (pixel) | ||
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let unregister: (() => void) | null = null; | ||
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const injectBlurVideo = (): (() => void) | null => { | ||
const songVideo = document.querySelector<HTMLDivElement>('#song-video'); | ||
const video = document.querySelector<HTMLVideoElement>('#song-video .html5-video-container > video'); | ||
const wrapper = document.querySelector('#song-video > .player-wrapper'); | ||
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if (!songVideo) return null; | ||
if (!video) return null; | ||
if (!wrapper) return null; | ||
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const blurCanvas = document.createElement('canvas'); | ||
blurCanvas.classList.add('html5-blur-canvas'); | ||
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const context = blurCanvas.getContext('2d', { willReadFrequently: true }); | ||
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/* effect */ | ||
let lastEffectWorkId: number | null = null; | ||
let lastImageData: ImageData | null = null; | ||
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const onSync = () => { | ||
if (typeof lastEffectWorkId === 'number') cancelAnimationFrame(lastEffectWorkId); | ||
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lastEffectWorkId = requestAnimationFrame(() => { | ||
if (!context) return; | ||
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const width = qualityRatio; | ||
let height = Math.max(Math.floor(blurCanvas.height / blurCanvas.width * width), 1); | ||
if (!Number.isFinite(height)) height = width; | ||
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context.globalAlpha = 1; | ||
if (lastImageData) { | ||
const frameOffset = (1 / framerate) * (1000 / interpolationTime); | ||
context.globalAlpha = 1 - (frameOffset * 2); // because of alpha value must be < 1 | ||
context.putImageData(lastImageData, 0, 0); | ||
context.globalAlpha = frameOffset; | ||
} | ||
context.drawImage(video, 0, 0, width, height); | ||
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const nowImageData = context.getImageData(0, 0, width, height); | ||
lastImageData = nowImageData; | ||
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lastEffectWorkId = null; | ||
}); | ||
}; | ||
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const applyVideoAttributes = () => { | ||
const rect = video.getBoundingClientRect(); | ||
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const newWidth = Math.floor(video.width || rect.width); | ||
const newHeight = Math.floor(video.height || rect.height); | ||
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if (newWidth === 0 || newHeight === 0) return; | ||
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blurCanvas.width = qualityRatio; | ||
blurCanvas.height = Math.floor(newHeight / newWidth * qualityRatio); | ||
blurCanvas.style.width = `${newWidth}px`; | ||
blurCanvas.style.height = `${newHeight}px`; | ||
}; | ||
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const observer = new MutationObserver((mutations) => { | ||
mutations.forEach((mutation) => { | ||
if (mutation.type === 'attributes') { | ||
applyVideoAttributes(); | ||
} | ||
}); | ||
}); | ||
const resizeObserver = new ResizeObserver(() => { | ||
applyVideoAttributes(); | ||
}); | ||
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/* hooking */ | ||
let canvasInterval: NodeJS.Timeout | null = null; | ||
canvasInterval = setInterval(onSync, Math.max(1, Math.ceil(1000 / framerate))); | ||
applyVideoAttributes(); | ||
observer.observe(songVideo, { attributes: true }); | ||
resizeObserver.observe(songVideo); | ||
window.addEventListener('resize', applyVideoAttributes); | ||
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const onPause = () => { | ||
if (canvasInterval) clearInterval(canvasInterval); | ||
canvasInterval = null; | ||
}; | ||
const onPlay = () => { | ||
if (canvasInterval) clearInterval(canvasInterval); | ||
canvasInterval = setInterval(onSync, Math.max(1, Math.ceil(1000 / framerate))); | ||
}; | ||
songVideo.addEventListener('pause', onPause); | ||
songVideo.addEventListener('play', onPlay); | ||
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/* injecting */ | ||
wrapper.prepend(blurCanvas); | ||
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/* cleanup */ | ||
return () => { | ||
if (canvasInterval) clearInterval(canvasInterval); | ||
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songVideo.removeEventListener('pause', onPause); | ||
songVideo.removeEventListener('play', onPlay); | ||
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observer.disconnect(); | ||
resizeObserver.disconnect(); | ||
window.removeEventListener('resize', applyVideoAttributes); | ||
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wrapper.removeChild(blurCanvas); | ||
}; | ||
}; | ||
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const playerPage = document.querySelector<HTMLElement>('#player-page'); | ||
const ytmusicAppLayout = document.querySelector<HTMLElement>('#layout'); | ||
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const observer = new MutationObserver((mutationsList) => { | ||
for (const mutation of mutationsList) { | ||
if (mutation.type === 'attributes') { | ||
const isPageOpen = ytmusicAppLayout?.hasAttribute('player-page-open'); | ||
if (isPageOpen) { | ||
unregister?.(); | ||
unregister = injectBlurVideo() ?? null; | ||
} else { | ||
unregister?.(); | ||
unregister = null; | ||
} | ||
} | ||
} | ||
}); | ||
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if (playerPage) { | ||
observer.observe(playerPage, { attributes: true }); | ||
} | ||
}; |
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Original file line number | Diff line number | Diff line change |
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#song-video canvas.html5-blur-canvas{ | ||
position: absolute; | ||
left: 0; | ||
top: 0; | ||
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filter: blur(100px); | ||
} |
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