export interface FilterCPUUtilizationHighEvent {
    cpuUtilization: number;
    filterMillis: number;
    periodMillis: number;
}
export interface FilterFrameDurationHighEvent {
    framesDropped: number;
    avgFilterDurationMillis: number;
    framerate: number;
    periodMillis: number;
}
/**
 * An observer for the background filter video frame processor.
 *
 * Use `BackgroundFilterVideoFrameProcessor.addObserver` to register an
 * observer with the processor.
 */
export default interface BackgroundFilterVideoFrameProcessorObserver {
    /**
     * This event occurs when the amount of time it takes to apply the background filter is longer than expected. The
     * measurement is taken from the time the process method starts to when it returns. For example, if the video
     * is running at 15 frames per second and we are averaging more than 67 ms (1000 ms reporting period / 15 fps)
     * to apply background filter, then a very large portion of each frame's maximum processing time is taken up by
     * processing background filter.
     *
     * The observer will be called a maximum of once per `periodMillis`. In the event that the `avgFilterDurationMillis`
     * is larger than expected the builder can use this event as a trigger to disable the background filter.
     *
     * @param event
     * framesDropped: The expected amount of frames based on frame rate minus the actual number of frames.
     * avgFilterDurationMillis: The average amount of time that the processor took per frame in the reporting period.
     * framerate: The video frame rate set by the SDK.
     * periodMillis: The duration of the reporting period in milliseconds.
     */
    filterFrameDurationHigh?: (event: FilterFrameDurationHighEvent) => void;
    /**
     * This event occurs when the CPU utilization of background filtering exceeds the `filterCPUUtilization` defined
     * in the `BackgroundBlurOptions`.
     *
     * @param event
     * cpuUtilization: The percentage of time that was spent processing background filter divided by the total reporting period time;
     * filterMillis: Total time spent processing the background filter in milliseconds;
     * periodMillis: Total time in the reporting period in milliseconds;
     */
    filterCPUUtilizationHigh?: (event: FilterCPUUtilizationHighEvent) => void;
}