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import * as React from "react"; import EnvelopePlugin from "wavesurfer.js/dist/plugins/envelope.esm.js"; import { cn } from "@/lib/utils"; import { Card, CardContent } from "@/components/ui/card"; import { Button } from "@/components/ui/button"; import { Slider } from "@/components/ui/slider"; import { Play, Pause, Volume2, VolumeX, RotateCcw } from "lucide-react"; import WavesurferPlayer, { formatTime, useCssVar, useWavePlayer, } from "@/lib/wave-cn"; import type WaveSurfer from "wavesurfer.js"; // ─── Types ─────────────────────────────────────────────────────────────────── export interface EnvelopePoint { time: number; volume: number; } export interface WaveEnvelopeProps { /** Audio source URL */ src: string; /** Optional title shown above the waveform */ title?: string; /** Initial volume (0–1) */ defaultVolume?: number; /** Envelope line color @default "var(--primary)" */ lineColor?: string; /** Envelope line width in px @default 2 */ lineWidth?: number; /** Drag point radius in px @default 10 */ dragPointSize?: number; /** Drag point fill color @default "var(--primary)" */ dragPointFill?: string; /** Drag point stroke color @default "var(--background)" */ dragPointStroke?: string; /** Fade in end time in seconds */ fadeInEnd?: number; /** Fade out start time in seconds */ fadeOutStart?: number; /** Audio bar color @default "var(--muted-foreground)" */ waveColor?: string; /** Progress bar color @default "var(--primary)" */ progressColor?: string; /** Waveform bar width in px @default 3 */ barWidth?: number; /** Waveform bar gap in px @default 2 */ barGap?: number; /** Rounded borders for bars @default 2 */ barRadius?: number; /** Waveform height in px @default 64 */ waveHeight?: number; /** Called when envelope volume changes during playback */ onVolumeChange?: (volume: number) => void; /** Called when playback starts */ onPlay?: () => void; /** Called when playback pauses */ onPause?: () => void; /** Called when playback finishes */ onFinish?: () => void; /** Called with current time on every audio process tick */ onTimeUpdate?: (currentTime: number, duration: number) => void; className?: string; } type EnvelopePluginInstance = InstanceType; // ─── Component ─────────────────────────────────────────────────────────────── export function WaveEnvelope({ src, title, defaultVolume = 0.8, lineColor = "var(--primary)", lineWidth = 2, dragPointSize = 10, dragPointFill = "var(--primary)", dragPointStroke = "var(--background)", fadeInEnd, fadeOutStart, waveColor, progressColor, barWidth, barGap, barRadius, waveHeight, onVolumeChange, onPlay, onPause, onFinish, onTimeUpdate, className, }: WaveEnvelopeProps) { const [envelopePlugin, setEnvelopePlugin] = React.useState(null); const [envelopeVolume, setEnvelopeVolume] = React.useState(defaultVolume); // Latest callback readable from the plugin listener without re-subscribing. const latest = React.useRef({ onVolumeChange }); React.useEffect(() => { latest.current = { onVolumeChange }; }); // The envelope is drawn as SVG: resolve tokens to concrete colors. const resolvedLineColor = useCssVar(lineColor); const resolvedDragPointFill = useCssVar(dragPointFill); const resolvedDragPointStroke = useCssVar(dragPointStroke); // ── Build initial points from fade config ───────────────────────────────── const initialPoints = React.useMemo(() => { const pts: EnvelopePoint[] = []; if (fadeInEnd !== undefined && fadeInEnd > 0) { pts.push({ time: 0, volume: 0 }); pts.push({ time: fadeInEnd, volume: defaultVolume }); } if (fadeOutStart !== undefined) { pts.push({ time: fadeOutStart, volume: defaultVolume }); } return pts; }, [fadeInEnd, fadeOutStart, defaultVolume]); // ── Memoized plugins ────────────────────────────────────────────────────── const plugins = React.useMemo( () => typeof document === "undefined" ? [] : [ EnvelopePlugin.create({ volume: defaultVolume, lineColor: resolvedLineColor, lineWidth: `${lineWidth}px`, dragPointSize, dragPointFill: resolvedDragPointFill, dragPointStroke: resolvedDragPointStroke, points: initialPoints.length > 0 ? initialPoints : undefined, }), ], [ defaultVolume, resolvedLineColor, lineWidth, dragPointSize, resolvedDragPointFill, resolvedDragPointStroke, initialPoints, ], ); // ── Player ──────────────────────────────────────────────────────────────── const player = useWavePlayer({ defaultVolume, onPlay, onPause, onFinish, onTimeUpdate, onReady: (ws) => { const live = ws .getActivePlugins() .find((p) => p instanceof EnvelopePlugin) as | EnvelopePluginInstance | undefined; setEnvelopePlugin(live ?? null); }, }); const handlers = React.useMemo( () => ({ ...player.handlers, onDestroy: (ws: WaveSurfer) => { player.handlers.onDestroy?.(ws); setEnvelopePlugin(null); }, }), [player.handlers], ); // ── Envelope volume events ──────────────────────────────────────────────── React.useEffect(() => { if (!envelopePlugin) return; const unsub = envelopePlugin.on("volume-change", (vol: number) => { setEnvelopeVolume(vol); latest.current.onVolumeChange?.(vol); }); return () => unsub(); }, [envelopePlugin]); // ── Controls ────────────────────────────────────────────────────────────── const { seek } = player; const handleSeek = React.useCallback(([v]: number[]) => seek(v), [seek]); // ── Derived ─────────────────────────────────────────────────────────────── const { isReady, isPlaying, isMuted, currentTime, duration, progress } = player; // ── Render ──────────────────────────────────────────────────────────────── return ( {title && (

{title}

)} {/* Waveform with envelope overlay */}

{/* Volume indicator */}

Envelope volume:{" "} {Math.round(envelopeVolume * 100)}% — drag points to adjust

{/* Seek bar */}

{formatTime(currentTime)} {formatTime(duration)}

{/* Controls */}

{/* Volume / Mute */}

); } export default WaveEnvelope; 4f:["$","div",null,{"className":"mt-3 flex min-h-0 min-w-0 flex-1 flex-col gap-3","children":[["$","div",null,{"className":"flex shrink-0 items-start gap-3","children":[["$","div",null,{"className":"flex max-h-28 min-w-0 flex-1 flex-wrap items-center gap-2 overflow-y-auto","children":[["$","ul",null,{"className":"flex min-w-0 flex-wrap gap-2","aria-label":"Package dependencies","children":[["$","li","wavesurfer.js",{"className":"min-w-0 max-w-full","children":["$","a",null,{"href":"https://www.npmjs.com/package/wavesurfer.js","target":"_blank","rel":"noopener noreferrer","className":"flex max-w-full min-w-0 items-center gap-1.5 rounded-md border px-2 py-1.5 text-xs","children":[["$","svg",null,{"viewBox":"0 0 24 24","className":"size-3 shrink-0","children":["$","path",null,{"d":"M1.763 0C.786 0 0 .786 0 1.763v20.474C0 23.214.786 24 1.763 24h20.474c.977 0 1.763-.786 1.763-1.763V1.763C24 .786 23.214 0 22.237 0zM5.13 5.323l13.837.019-.009 13.836h-3.464l.01-10.382h-3.456L12.04 19.17H5.113z","fill":"currentColor"}]}],["$","span",null,{"className":"min-w-0 break-all text-xs font-medium","children":"wavesurfer.js"}]]}]}],["$","li","lucide-react",{"className":"min-w-0 max-w-full","children":["$","a",null,{"href":"https://www.npmjs.com/package/lucide-react","target":"_blank","rel":"noopener noreferrer","className":"flex max-w-full min-w-0 items-center gap-1.5 rounded-md border px-2 py-1.5 text-xs","children":[["$","svg",null,{"viewBox":"0 0 24 24","className":"size-3 shrink-0","children":["$","path",null,{"d":"M1.763 0C.786 0 0 .786 0 1.763v20.474C0 23.214.786 24 1.763 24h20.474c.977 0 1.763-.786 1.763-1.763V1.763C24 .786 23.214 0 22.237 0zM5.13 5.323l13.837.019-.009 13.836h-3.464l.01-10.382h-3.456L12.04 19.17H5.113z","fill":"currentColor"}]}],["$","span",null,{"className":"min-w-0 break-all text-xs font-medium","children":"lucide-react"}]]}]}]]}],["$","$L50",null,{"namespace":"@waves-cn","registryDependencies":["@waves-cn/wave-cn","button","card","slider"]}]]}],null]}],["$","$L51",null,{"files":[{"path":"src/registry/components/wave-envelope.tsx","content":"$52","type":"registry:component","target":"components/waves-cn/wave-envelope.tsx"}],"className":"h-[70svh] min-h-80"}]]}]