/*!
 * Copyright (c) 2025-present, Vanilagy and contributors
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */
/**
 * Decodes audio frames from encoded chunks.
 *
 * Corresponds to the WebCodecs AudioDecoder API.
 */
export declare class AudioDecoderPolyfill extends EventTarget {
    private init;
    private codecContext;
    private mutex;
    private frame;
    private packet;
    private _decodeQueueSize;
    private currentConfigId;
    private _keyChunkRequired;
    private _pendingFlushResolvers;
    private _state;
    /**
     * The current state of the decoder.
     */
    get state(): CodecState;
    /**
     * The number of pending decode operations.
     */
    get decodeQueueSize(): number;
    /**
     * Event handler called when a decode operation completes and leaves the queue.
     */
    ondequeue: ((this: AudioDecoder, ev: Event) => unknown) | null;
    /**
     * Creates a new AudioDecoder.
     */
    constructor(init: AudioDecoderInit);
    private static createCodecContext;
    /**
     * Checks if the decoder can support the given configuration.
     */
    static isConfigSupported(config: AudioDecoderConfig): Promise<AudioDecoderSupport>;
    /**
     * Configures the decoder with the given configuration.
     */
    configure(config: AudioDecoderConfig): void;
    private configureInternal;
    /**
     * Queues an encoded audio chunk to be decoded.
     */
    decode(chunk: EncodedAudioChunk): void;
    private outputData;
    private decrementQueue;
    private decodeInternal;
    /**
     * Flushes all pending decode operations and waits for completion.
     */
    flush(): Promise<void>;
    private flushInternal;
    /**
     * Closes the decoder and releases all resources.
     */
    close(): void;
    /**
     * Resets the decoder to an unconfigured state.
     */
    reset(): void;
    private handleAsyncError;
}