import { Filter, FilterStreamRef } from '../../../Filter';
import { Stream } from '../../../Compiler';
/**
  * 9.3 anullsrc
  * The null audio source, return unprocessed audio frames. It is mainly useful as a template and to be employed in analysis / debugging tools, or as the source for filters which ignore the input data (for example the sox synth filter).
  *
  * This source accepts the following options:
  */
export declare class AudioNullSrc extends Filter<AudioNullSrcParameters> {
    outputs: FilterStreamRef<AudioNullSrcParameters, AudioNullSrc>[];
    constructor(inputs?: Stream | Stream[], parameters?: AudioNullSrcParameters);
}
export interface AudioNullSrcParameters {
    /**
      * Specifies the channel layout, and can be either an integer or a string representing a channel layout. The default value of channel_layout is "stereo".
      * Check the channel_layout_map definition in
      * libavutil/channel_layout.c for the mapping between strings and channel layout values.
      * @aliases cl
      */
    channel_layout?: string | number;
    /**
      * Specifies the channel layout, and can be either an integer or a string representing a channel layout. The default value of channel_layout is "stereo".
      * Check the channel_layout_map definition in
      * libavutil/channel_layout.c for the mapping between strings and channel layout values.
      * @aliasof channel_layout
      */
    cl?: string | number;
    /**
      * Specifies the sample rate, and defaults to 44100.
      * @aliases r
      */
    sample_rate?: string | number;
    /**
      * Specifies the sample rate, and defaults to 44100.
      * @aliasof sample_rate
      */
    r?: string | number;
    /**
      * Set the number of samples per requested frames.
      * @aliases n
      */
    nb_samples?: string | number;
    /**
      * Set the number of samples per requested frames.
      * @aliasof nb_samples
      */
    n?: string | number;
    [key: string]: string | number;
}
/**
  * 9.3 anullsrc
  * The null audio source, return unprocessed audio frames. It is mainly useful as a template and to be employed in analysis / debugging tools, or as the source for filters which ignore the input data (for example the sox synth filter).
  *
  * This source accepts the following options:
  */
export declare function audioNullSrc(inputs?: Stream | Stream[], parameters?: AudioNullSrcParameters): AudioNullSrc;