marc2k3's spectrogram edited

spectrogram.js

"use strict"
window.DefineScript("Spectrogram Edit")
include("./felpers.js")

const ffmpegFilterConfig = "atrim=0:30,showspectrumpic=legend=0:s=512x512"
const titleFormatImagePath = fb.TitleFormat(`$crc32($lower(%path%'${ffmpegFilterConfig}')).jpeg`)
const titleFormatCue = fb.TitleFormat("$if($or($strcmp(%__cue_embedded%,yes),$strcmp($right(%path%,3),cue)),cue,)")

const dataFolder = pathJoin(fb.ProfilePath, "js_data")
idemptCreateFolder(dataFolder)

const cacheFolder = pathJoin(dataFolder, "spectrogram_cache")
idemptCreateFolder(cacheFolder)

/** @type {GdiBitmap|string} */
let content = "Idle"

const update = () => {
	const metaDB = fb.GetNowPlaying()

	if (
		metaDB === null
		|| !metaDB.RawPath.includes("file")
		|| titleFormatCue.Eval() === "cue"
		|| metaDB.SubSong > 0
	) {
		console.log("The horsemen")
		return null
	}

	const filepath = pathJoin(cacheFolder, titleFormatImagePath.Eval())
	const isCached = utils.IsFile(filepath)

	if (isCached) {
		updateSpectogram(filepath)
		return
	}

	updateSpectogram(null)
	const cmd = `ffmpeg -i "${metaDB.Path}" -lavfi ${ffmpegFilterConfig} "${filepath}"`
	console.log(cmd)
	runSync(cmd)
	updateSpectogram(filepath)
}

/** @param {string|null} imgPath */
const updateSpectogram = imgPath => {
	if (imgPath === null) {
		content = "Loading..."
	} else {
		const img = gdi.Image(imgPath)
		content = img || "Unable to load image"
	}

	window.Repaint()
}

if (fb.IsPlaying) {
	update()
}

function on_playback_new_track() {
	update()
}

const font = gdi.Font("Helvetica Neue LT Pro", 16)

/** @param {GdiGraphics} gr */
function on_paint(gr) {
	gr.FillSolidRect(0, 0, window.Width, window.Height, rgb(0, 0, 0))

	if (font === null) {
		throw new Error("couldn't load font")
	}

	if (typeof content === "object") {
		drawImage(gr, content, 0, 0, window.Width, window.Height, "stretch")
	} else {
		gr.DrawString(content, font, rgb(100, 100, 100), 20, 20, 100, 50)
	}
}

/**
 * @param {number} x
 * @param {number} y
 */
function on_mouse_rbtn_up(x, y) {
	const menu = window.CreatePopupMenu()
	menu.AppendMenuItem(MF_STRING, 5, "Configure...")

	const idx = menu.TrackPopupMenu(x, y)

	if (idx === 5) {
		window.ShowConfigureV2()
	}
}