/**
 * Progress Tracker
 *
 * Tracks progress of streaming operations with:
 * - Progress percentage calculation
 * - ETA estimation (time remaining)
 * - Throughput calculation (bytes/sec)
 * - Progress event emission
 */
export interface ProgressInfo {
    bytesProcessed: number;
    totalBytes: number;
    percentage: number;
    throughput: number;
    eta: number;
    elapsedTime: number;
}
export type ProgressCallback = (info: ProgressInfo) => void;
export declare class ProgressTracker {
    private bytesProcessed;
    private totalBytes;
    private startTime;
    private lastUpdateTime;
    private callbacks;
    constructor(totalBytes?: number);
    /**
     * Update progress with new bytes processed
     */
    update(bytesProcessed: number, totalBytes?: number): void;
    /**
     * Get current progress information
     */
    getProgress(): ProgressInfo;
    /**
     * Calculate progress percentage (0-100)
     */
    getPercentage(): number;
    /**
     * Calculate throughput in bytes per second
     */
    getThroughput(): number;
    /**
     * Estimate time remaining in milliseconds
     */
    getETA(): number;
    /**
     * Format bytes to human-readable string
     */
    formatBytes(bytes: number): string;
    /**
     * Format milliseconds to human-readable time
     */
    formatTime(ms: number): string;
    /**
     * Get human-readable progress summary
     */
    getSummary(): string;
    /**
     * Register progress callback
     */
    onProgress(callback: ProgressCallback): void;
    /**
     * Emit progress event to all callbacks
     */
    private emitProgress;
    /**
     * Reset tracker for new operation
     */
    reset(totalBytes?: number): void;
    /**
     * Mark operation as complete
     */
    complete(): void;
}
/**
 * Create a progress tracker with automatic callback setup
 */
export declare function createProgressTracker(totalBytes: number, callback: ProgressCallback): ProgressTracker;
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