/**
 * Audio processing utilities for Gemini Live voice agent
 * Handles encoding, decoding, and audio stream processing
 */
/**
 * Encode Uint8Array to base64 string
 * @param data Binary data to encode
 * @returns Base64 encoded string
 */
export declare function encode(data: Uint8Array): string;
/**
 * Decode base64 string to Uint8Array
 * @param base64 Base64 encoded string
 * @returns Binary data as Uint8Array
 */
export declare function decode(base64: string): Uint8Array;
/**
 * Convert Float32Array audio data to PCM16 Blob
 * @param float32Array Audio data from AudioBuffer
 * @returns Blob containing PCM16 audio data
 */
export declare function createBlob(float32Array: Float32Array): Blob;
/**
 * Decode audio data for playback
 * @param audioContext Web Audio API context
 * @param data PCM16 audio data
 * @returns Promise resolving to AudioBuffer
 */
export declare function decodeAudioData(audioContext: AudioContext, data: Uint8Array): Promise<AudioBuffer>;
/**
 * Create an audio worklet processor for real-time audio capture
 * @returns Audio worklet code as string
 */
export declare function getAudioWorkletCode(): string;
/**
 * Check if browser supports required audio APIs
 * @returns Object with support flags
 */
export declare function checkAudioSupport(): {
    audioContext: boolean;
    mediaDevices: boolean;
    audioWorklet: boolean;
};
/**
 * Get audio constraints for microphone capture
 * @returns MediaStreamConstraints for high-quality audio
 */
export declare function getAudioConstraints(): MediaStreamConstraints;
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