/**
 * Utilities for working with waveform data
 */
export interface AudioAnalysisOptions {
    /** Sample rate for analysis */
    sampleRate?: number;
    /** Window size for FFT analysis */
    windowSize?: number;
    /** Overlap between windows */
    overlap?: number;
}
export interface WaveformDataOptions {
    /** Number of peaks to generate */
    length: number;
    /** Frequency of the primary wave */
    frequency?: number;
    /** Amplitude modulation frequency */
    modulation?: number;
    /** Add noise to the signal */
    noise?: number;
    /** Audio duration in seconds (for realistic data) */
    duration?: number;
}
/**
 * Generate realistic-looking waveform test data
 */
export declare const generateWaveformData: (options: WaveformDataOptions) => {
    peaks: number[];
    rms: number[];
};
/**
 * Normalize waveform data to a specific range
 */
export declare const normalizeWaveform: (peaks: number[], targetMin?: number, targetMax?: number) => number[];
/**
 * Downsample waveform data for performance
 */
export declare const downsampleWaveform: (peaks: number[], targetLength: number) => number[];
/**
 * Calculate RMS values from peak data
 */
export declare const calculateRMS: (peaks: number[], windowSize?: number) => number[];
/**
 * Find peaks in waveform data (useful for marker placement)
 */
export declare const findPeaks: (peaks: number[], threshold?: number, minDistance?: number) => number[];
/**
 * Convert audio buffer to waveform data
 * (Note: This would typically be used with Web Audio API)
 */
export declare const audioBufferToWaveform: (audioBuffer: AudioBuffer, targetLength?: number) => {
    peaks: number[];
    rms: number[];
};
/**
 * Generate time-based markers for common audio structures
 */
export declare const generateAudioMarkers: (duration: number, structure?: "song" | "podcast" | "speech") => ({
    position: number;
    label: string;
    type: "flag";
} | {
    position: number;
    label: string;
    type: "line";
} | {
    position: number;
    label: string;
    type: "dot";
})[];
/**
 * Create test data presets for demos
 */
export declare const createTestPresets: () => {
    musicTrack: {
        peaks: number[];
        rms: number[];
    };
    podcast: {
        peaks: number[];
        rms: number[];
    };
    speech: {
        peaks: number[];
        rms: number[];
    };
    quietAudio: {
        peaks: number[];
        rms: number[];
    };
    largDataset: {
        peaks: number[];
        rms: number[];
    };
};