/**
 * WebP Decoder - Instance-based decoder for efficient batch processing
 */
import { WebPDecodeOptions, DecodedImage } from './types';
/**
 * WebP Decoder class
 *
 * Creates a decoder instance that can be reused for multiple images,
 * reducing initialization overhead.
 *
 * @example
 * ```typescript
 * const decoder = new WebPDecoder({ format: PixelFormat.RGBA });
 * const decoded1 = decoder.decode(webpData1);
 * const decoded2 = decoder.decode(webpData2);
 * decoder.close();
 * ```
 */
export declare class WebPDecoder {
    private decoderPtr;
    private closed;
    /**
     * Create a new WebP decoder with the given options
     * @param options Partial WebP decoding options (merged with defaults)
     */
    constructor(options?: Partial<WebPDecodeOptions>);
    /**
     * Decode WebP data to pixel data
     * @param webpData Buffer containing WebP encoded data
     * @returns Decoded image with pixel data
     */
    decode(webpData: Buffer): DecodedImage;
    /**
     * Close the decoder and free resources
     * Must be called when done using the decoder
     */
    close(): void;
    /**
     * Get default WebP decoding options
     */
    static getDefaultOptions(): WebPDecodeOptions;
    /**
     * Convert TypeScript options to C struct
     */
    private convertOptions;
}
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