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audio-ui/components/editor/AudioInfo.tsx

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feat: implement Phase 2 - Web Audio API engine and waveform visualization Phase 2 Complete Features: - Web Audio API context management with browser compatibility - Audio file upload with drag-and-drop support - Audio decoding for multiple formats (WAV, MP3, OGG, FLAC, AAC, M4A) - AudioPlayer class with full playback control - Waveform visualization using Canvas API - Real-time waveform rendering with progress indicator - Playback controls (play, pause, stop, seek) - Volume control with mute/unmute - Timeline scrubbing - Audio file information display Components: - AudioEditor: Main editor container - FileUpload: Drag-and-drop file upload component - AudioInfo: Display audio file metadata - Waveform: Canvas-based waveform visualization - PlaybackControls: Transport controls with volume slider Audio Engine: - lib/audio/context.ts: AudioContext management - lib/audio/decoder.ts: Audio file decoding utilities - lib/audio/player.ts: AudioPlayer class for playback - lib/waveform/peaks.ts: Waveform peak generation Hooks: - useAudioPlayer: Complete audio player state management Types: - types/audio.ts: TypeScript definitions for audio types Features Working: ✓ Load audio files via drag-and-drop or file picker ✓ Display waveform with real-time progress ✓ Play/pause/stop controls ✓ Seek by clicking on waveform or using timeline slider ✓ Volume control with visual feedback ✓ Audio file metadata display (duration, sample rate, channels) ✓ Toast notifications for user feedback ✓ SSR-safe audio context initialization ✓ Dark/light theme support Tech Stack: - Web Audio API for playback - Canvas API for waveform rendering - React 19 hooks for state management - TypeScript for type safety Build verified and working ✓ 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-17 15:32:00 +01:00
'use client';
import * as React from 'react';
import { FileAudio, X } from 'lucide-react';
import { Card, CardContent } from '@/components/ui/Card';
import { Button } from '@/components/ui/Button';
import { formatFileSize, formatDuration } from '@/lib/audio/decoder';
import { cn } from '@/lib/utils/cn';
export interface AudioInfoProps {
fileName: string;
audioBuffer: AudioBuffer;
onClear?: () => void;
className?: string;
}
export function AudioInfo({ fileName, audioBuffer, onClear, className }: AudioInfoProps) {
const fileSize = audioBuffer.length * audioBuffer.numberOfChannels * 4; // Approximate size in bytes
return (
<Card className={cn('', className)}>
<CardContent className="p-4">
<div className="flex items-start gap-3">
<FileAudio className="h-5 w-5 text-primary flex-shrink-0 mt-0.5" />
<div className="flex-1 min-w-0 space-y-2">
<div className="flex items-start justify-between gap-2">
<div className="min-w-0 flex-1">
<h3 className="font-medium text-foreground truncate" title={fileName}>
{fileName}
</h3>
</div>
{onClear && (
<Button
variant="ghost"
size="icon"
onClick={onClear}
className="h-8 w-8 flex-shrink-0"
title="Clear audio"
>
<X className="h-4 w-4" />
</Button>
)}
</div>
<div className="grid grid-cols-2 gap-x-4 gap-y-1 text-sm text-muted-foreground">
<div>
<span className="font-medium">Duration:</span>{' '}
{formatDuration(audioBuffer.duration)}
</div>
<div>
<span className="font-medium">Sample Rate:</span>{' '}
{audioBuffer.sampleRate.toLocaleString()} Hz
</div>
<div>
<span className="font-medium">Channels:</span>{' '}
{audioBuffer.numberOfChannels === 1 ? 'Mono' : audioBuffer.numberOfChannels === 2 ? 'Stereo' : `${audioBuffer.numberOfChannels} channels`}
</div>
<div>
<span className="font-medium">Size:</span>{' '}
{formatFileSize(fileSize)}
</div>
</div>
</div>
</div>
</CardContent>
</Card>
);
}