/**
 * A plugin implementing this interface can be registered with HMSLocalAudioTrack to transform, process or
 * analyze the local audio track.These can include applications like background noise removal, speech commands, live
 * analysis of audio etc. The below functions are required for the sdk to properly use the plugin, usually
 * the plugin would also be exposing some public functions of its own for the UI to control its working.
 */
export interface HMSAudioPlugin {
    /**
     * This function will be called by the SDK for audio track which the plugin needs to process.
     * The reason audio context is also part of the interface is that it's recommended to reuse on audio context
     * instead of creating new for every use - https://developer.mozilla.org/en-US/docs/Web/API/AudioContext
     */
    processAudioTrack(ctx: AudioContext, source: AudioNode): Promise<AudioNode>;
    /**
     * This function will be called before the call to init, it is used to check whether the plugin supports current
     * OS, browser and audio device or not. An error object will be thrown back to the user if they try to use an unsupported plugin.
     */
    checkSupport(ctx?: AudioContext): HMSPluginSupportResult;
    /**
     * @deprecated. Will be deleted in future updates. Use checkSupport instead.
     */
    isSupported(): boolean;
    /**
     * This function will be called in the beginning for initialization which may include tasks like setting up
     * variables, loading ML models etc. This can be used by a plugin to ensure it's prepared at the time
     * processAudio is called.
     */
    init(): Promise<void> | void;
    /**
     * The name is meant to uniquely specify a plugin instance. This will be used to track number of plugins
     * added to the track, and same name won't be allowed twice.
     */
    getName(): string;
    /**
     This sets the Plugin type @see HMSAudioPluginType, processing will happen
     based on the type of plugin
     */
    getPluginType(): HMSAudioPluginType;
    stop(): void;
}
/**
 * Specifies the type of the plugin a transforming plugin will get an output audio node to give the resulting
 * transformation. While an analyzing plugin will only be passed the input node.
 * For analyse plugins, you can return the source node passed to plugin.processTrack to not modify anything
 */
export declare enum HMSAudioPluginType {
    TRANSFORM = "TRANSFORM",
    ANALYZE = "ANALYZE"
}
export interface HMSPluginSupportResult {
    isSupported: boolean;
    errType?: HMSPluginUnsupportedTypes;
    errMsg?: string;
}
export declare enum HMSPluginUnsupportedTypes {
    PLATFORM_NOT_SUPPORTED = "PLATFORM_NOT_SUPPORTED",
    DEVICE_NOT_SUPPORTED = "DEVICE_NOT_SUPPORTED"
}