/**
 * Returns a generic SDP for the given direction.
 * We use this SDP to send it as part of our JoinRequest so that the SFU
 * can use it to determine the client's codec capabilities.
 *
 * @param direction the direction of the transceiver.
 * @param codecToKeep the codec mime type to keep (video/h264 or audio/opus).
 * @param fmtpProfileToKeep optional fmtp profile to keep.
 */
export declare const getGenericSdp: (direction: RTCRtpTransceiverDirection, codecToKeep: string | undefined, fmtpProfileToKeep: string | undefined) => Promise<string>;
/**
 * Returns whether the codec is an SVC codec.
 *
 * @param codecOrMimeType the codec to check.
 */
export declare const isSvcCodec: (codecOrMimeType: string | undefined) => boolean;