import { LitElement } from 'lit';
import type { DeviceController } from '@signalwire/js';
import '../UI/icons/sw-ui-icon.js';
import '../sw-local-camera.js';
import '../sw-audio-level.js';
/**
 * Single-button device settings popover. Opens a panel above the button
 * with sections for Microphone, Camera, and Speaker selection.
 *
 * When `show-preview` is enabled, the open panel also renders a live
 * camera preview, a microphone level meter for the currently selected
 * input devices, and a "Test speaker" button that plays a short tone
 * through the selected output.
 *
 * @fires sw-device-change - User picked a device. Detail: `{ type: 'microphone'|'camera'|'speaker', device: MediaDeviceInfo }`.
 * @cssprop --ctrl-*  - all primitive ctrl tokens
 */
export declare class SwDeviceSelector extends LitElement {
    static styles: import("lit").CSSResult[];
    deviceController?: DeviceController;
    /**
     * Render inline previews (camera video, mic level, speaker test) inside
     * each section while the panel is open. Streams are acquired only while
     * the panel is open and stopped when it closes.
     */
    showPreview: boolean;
    private _videoStream;
    private _audioStream;
    private _testingSpeaker;
    private _audioIn;
    private _videoIn;
    private _audioOut;
    private _selAudioIn;
    private _selVideoIn;
    private _selAudioOut;
    private _open;
    private _subs;
    private _onDocumentClick;
    connectedCallback(): void;
    protected updated(changed: Map<string, unknown>): void;
    disconnectedCallback(): void;
    protected willUpdate(changed: Map<string, unknown>): void;
    private _subscribe;
    private _unsubscribe;
    private _toggle;
    private _selectMic;
    private _selectCamera;
    private _selectSpeaker;
    private _startVideoPreview;
    private _stopVideoPreview;
    private _startAudioPreview;
    private _stopAudioPreview;
    private static readonly _TEST_TONE_DATA_URI;
    private _testAudio?;
    private _testSpeaker;
    private _stopTestTone;
    private _emitChange;
    private _renderSection;
    private _renderCameraPreview;
    private _renderMicPreview;
    private _renderSpeakerPreview;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'sw-device-selector': SwDeviceSelector;
    }
}
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