import { AudioFrame } from './audio_frame.js';
import '@livekit/rtc-ffi-bindings';

/**
 * Resampler quality. Higher quality settings result in better audio quality but require more
 * processing power.
 */
declare enum AudioResamplerQuality {
    QUICK = 0,
    LOW = 1,
    MEDIUM = 2,
    HIGH = 3,
    VERY_HIGH = 4
}
/**
 * AudioResampler provides functionality to resample audio data from an input sample rate to
 * an output sample rate using the Sox resampling library. It supports multiple channels and
 * configurable resampling quality.
 */
declare class AudioResampler {
    #private;
    /**
     * Initializes a new AudioResampler.
     *
     * @param inputRate - The sample rate of the input audio data (in Hz).
     * @param outputRate - The desired sample rate of the output audio data (in Hz).
     * @param channels - The number of audio channels (e.g., 1 for mono, 2 for stereo). Defaults to 1.
     * @param quality - The quality setting for the resampler. Defaults to
     * `AudioResamplerQuality.MEDIUM`.
     */
    constructor(inputRate: number, outputRate: number, channels?: number, quality?: AudioResamplerQuality);
    get inputRate(): number;
    get outputRate(): number;
    get channels(): number;
    /**
     * Releases the underlying native resampler handle. Must be called when
     * the resampler is no longer needed to avoid leaking the FD.
     */
    close(): void;
    /**
     * Push audio data into the resampler and retrieve any available resampled data.
     *
     * This method accepts audio data, resamples it according to the configured input and output rates,
     * and returns any resampled data that is available after processing the input.
     *
     * @param data - The audio frame to resample
     *
     * @returns A list of {@link AudioFrame} objects containing the resampled audio data. The list may
     * be empty if no output data is available yet.
     */
    push(data: AudioFrame): AudioFrame[];
    /**
     * Flush any remaining audio data through the resampler and retrieve the resampled data.
     *
     * @remarks
     * This method should be called when no more input data will be provided to ensure that all
     * internal buffers are processed and all resampled data is output.
     */
    flush(): AudioFrame[];
}

export { AudioResampler, AudioResamplerQuality };