/**
 * Platform-agnostic microphone streaming interface for Scribe.
 *
 * The web implementation (`platform/web/scribeMicrophone.ts`) provides the
 * actual AudioContext + getUserMedia pipeline; other platforms can supply
 * their own implementation via `setScribeMicrophoneSetup`.
 */
export interface ScribeMicrophoneConfig {
    deviceId?: MediaDeviceConstraint;
    echoCancellation?: boolean;
    noiseSuppression?: boolean;
    autoGainControl?: boolean;
    channelCount?: number;
}
export interface ScribeMicrophoneResult {
    /** Track reference so the connection can toggle `track.enabled` for mute/unmute. */
    mediaStreamTrack: MediaStreamTrack;
    /** Tear down the audio pipeline and release hardware. */
    cleanup: () => void;
}
/**
 * Sets up microphone capture and streams PCM audio to the provided callback.
 *
 * @param config - Microphone constraints
 * @param onAudioData - Called with base64-encoded PCM16 chunks
 * @returns A result containing the track and cleanup function
 */
export type ScribeMicrophoneSetup = (config: ScribeMicrophoneConfig, onAudioData: (base64Audio: string) => void) => Promise<ScribeMicrophoneResult>;
export declare function setScribeMicrophoneSetup(setup: ScribeMicrophoneSetup): void;
export declare function getScribeMicrophoneSetup(): ScribeMicrophoneSetup;
//# sourceMappingURL=microphone.d.ts.map