import type * as SdpTransform from 'sdp-transform';
import type { DtlsParameters } from '../../Transport';
import type { RtpCapabilities, RtpParameters } from '../../RtpParameters';
/**
 * This function must be called with an SDP with 1 m=audio and 1 m=video
 * sections.
 */
export declare function extractRtpCapabilities({ sdpObject, }: {
    sdpObject: SdpTransform.SessionDescription;
}): RtpCapabilities;
export declare function extractDtlsParameters({ sdpObject, }: {
    sdpObject: SdpTransform.SessionDescription;
}): DtlsParameters;
export declare function getCname({ offerMediaObject, }: {
    offerMediaObject: SdpTransform.MediaDescription;
}): string;
/**
 * Apply codec parameters in the given SDP m= section answer based on the
 * given RTP parameters of an offer.
 */
export declare function applyCodecParameters({ offerRtpParameters, answerMediaObject, }: {
    offerRtpParameters: RtpParameters;
    answerMediaObject: SdpTransform.MediaDescription;
}): void;
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