/**
 * MSE Intercept — Patches MediaSource to transparently transcode HEVC → H.264.
 *
 * Creates a proxy SourceBuffer that:
 * 1. Reports updating=true while transcoding is in progress (blocks dash.js)
 * 2. Fires proper updatestart/update/updateend events after transcoding
 * 3. Passes audio and other non-HEVC tracks through untouched
 */
import type { LogLevel } from "./log.js";
import type { SegmentTranscoderConfig } from "./segment-transcoder.js";
/**
 * The MSE constructor available in this browser: classic `MediaSource`,
 * `ManagedMediaSource` (the only one on iPhone Safari, iOS 17.1+), or null.
 */
export declare function getMediaSourceConstructor(): typeof MediaSource | null;
export interface MSEInterceptConfig extends SegmentTranscoderConfig {
    /** URL to the transcode worker script. When provided, transcoding runs off main thread. */
    workerUrl?: string;
    /** Called when video transcoding starts — use to pause player buffering. */
    onTranscodeStart?: () => void;
    /** Called when video transcoding ends — use to resume player buffering. */
    onTranscodeEnd?: () => void;
    /** Log verbosity: 'debug' | 'info' | 'warn' (default) | 'error' | 'silent'. */
    logLevel?: LogLevel;
}
/**
 * Install the MSE intercept. Call before dash.js initializes.
 */
export declare function installMSEIntercept(config?: MSEInterceptConfig): void;
/**
 * Remove the MSE intercept and restore original methods.
 */
export declare function uninstallMSEIntercept(): void;
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