/**
 * Voice emotion analysis via an external microservice.
 * Extracted from openai.ts for modular decomposition (Phase 3).
 */
interface AudioEvent {
    label: string;
    score: number;
}
interface Paralinguistics {
    speech_rate?: number;
    mean_pitch_hz?: number;
    pitch_std_hz?: number;
    jitter?: number;
    shimmer?: number;
    hnr_db?: number;
}
export interface VoiceAnalysisResult {
    emotion: string | null;
    emotion_scores?: Record<string, number>;
    arousal: number | null;
    dominance: number | null;
    valence: number | null;
    gender: string | null;
    age_estimate: number | null;
    duration_seconds: number;
    audio_events?: AudioEvent[];
    paralinguistics?: Paralinguistics;
}
/**
 * Analyze a voice message for emotion using an external microservice.
 * @param audioBuffer  Raw audio content (OGG).
 * @param serviceUrl   Base URL of the voice analysis service (e.g. https://voice-analysis.example.com).
 * @param timeoutMs    Request timeout in milliseconds (default: 15000).
 * @returns Analysis result, or null if the service is unavailable or errors.
 */
export declare function analyzeVoiceEmotion(audioBuffer: Buffer, serviceUrl: string, options?: {
    mimeType?: string;
    filename?: string;
    timeoutMs?: number;
}): Promise<VoiceAnalysisResult | null>;
export {};
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