# CompressWave

🌊 **Powerful file compression library that runs entirely in the browser**

A TypeScript/JavaScript library for client-side video and image compression with no server dependencies. Built with FFmpeg.wasm and modern web technologies.

## Features

- 🎥 **Video Compression** - Powered by FFmpeg.wasm
- 🖼️ **Image Optimization** - Smart compression with format conversion
- 🔒 **Privacy First** - 100% client-side processing
- ⚡ **High Performance** - WebAssembly and Web Workers
- 📦 **Zero Dependencies** - No server required
- 🎨 **TypeScript Support** - Full type definitions included

## Installation

```bash
npm install compresswave
```

## Quick Start

### Video Compression

```javascript
import { VideoCompressor } from 'compresswave';

const compressor = new VideoCompressor({
  preset: 'web',
  onProgress: (progress) => console.log(`${progress}% complete`),
  onComplete: (result) => console.log('Compressed:', result)
});

const compressedVideo = await compressor.compress(videoFile);
```

### Image Optimization

```javascript
import { ImageOptimizer } from 'compresswave';

const optimizer = new ImageOptimizer({
  quality: 0.8,
  maxWidth: 1920,
  format: 'auto'
});

const optimizedImage = await optimizer.process(imageFile);
```

### Batch Processing

```javascript
import { BatchProcessor } from 'compresswave';

const processor = new BatchProcessor({
  concurrency: 2,
  onFileComplete: (file, result) => {
    console.log(`${file.name} compressed: ${result.compressionRatio}%`);
  }
});

const results = await processor.compressFiles(fileList);
```

## API Reference

### VideoCompressor

```typescript
const compressor = new VideoCompressor(options: VideoCompressionOptions);
```

**Options:**
- `preset`: `'web' | 'mobile' | 'social' | 'email' | 'custom'`
- `codec`: `'h264' | 'h265' | 'vp8' | 'vp9' | 'av1'`
- `crf`: Quality factor (0-51, lower = better quality)
- `resolution`: `{ width: number, height: number }`
- `audio`: Audio compression settings
- `onProgress`: Progress callback function
- `onComplete`: Completion callback function

### ImageOptimizer

```typescript
const optimizer = new ImageOptimizer(options: ImageOptimizationOptions);
```

**Options:**
- `quality`: Image quality (0-1)
- `maxWidth`: Maximum width in pixels
- `maxHeight`: Maximum height in pixels
- `format`: `'auto' | 'jpeg' | 'png' | 'webp' | 'avif'`
- `progressive`: Enable progressive JPEG
- `preserveExif`: Preserve EXIF metadata

### BatchProcessor

```typescript
const processor = new BatchProcessor(options: BatchProcessingOptions);
```

**Options:**
- `concurrency`: Number of files to process simultaneously
- `onFileStart`: Called when file processing starts
- `onFileComplete`: Called when file processing completes
- `onFileError`: Called when file processing fails
- `onAllComplete`: Called when all files are processed

## Compression Presets

| Preset | Resolution | Quality | Use Case |
|--------|------------|---------|----------|
| `web` | 720p | High | Websites, streaming |
| `mobile` | 480p | Medium | Mobile devices |
| `social` | 1080x1080 | Medium | Social media |
| `email` | 360p | Low | Email attachments |

## Browser Compatibility

- Chrome 67+
- Firefox 62+
- Safari 13.1+
- Edge 79+

Requires support for:
- WebAssembly
- SharedArrayBuffer (for optimal performance)
- Web Workers

## Examples

### Custom Video Settings

```javascript
const compressor = new VideoCompressor({
  codec: 'h264',
  crf: 23,
  preset: 'medium',
  audio: {
    codec: 'aac',
    bitrate: '128k'
  },
  video: {
    bitrate: '1000k',
    framerate: 30,
    resolution: { width: 1280, height: 720 }
  }
});
```

### Image Format Conversion

```javascript
const optimizer = new ImageOptimizer();

// Convert to WebP
const webpImage = await optimizer.convertFormat(file, 'webp');

// Resize image
const resizedImage = await optimizer.resize(file, 800, 600);
```

### Progress Tracking

```javascript
const compressor = new VideoCompressor({
  onProgress: (progress) => {
    document.getElementById('progress').value = progress;
  },
  onComplete: (result) => {
    console.log(`Saved ${result.compressionRatio}% space`);
    console.log(`Processing took ${result.processingTime}ms`);
  }
});
```

## License

MIT © [Shaswat Raj](https://github.com/sh20raj)

## Contributing

Contributions are welcome! Please see our [Contributing Guide](https://github.com/sh20raj/compresswave/blob/main/CONTRIBUTING.md).

## Links

- [GitHub Repository](https://github.com/sh20raj/compresswave)
- [Documentation](https://compresswave.sh20raj.com/docs)
- [Live Demo](https://compresswave.sh20raj.com)
- [NPM Package](https://www.npmjs.com/package/compresswave)