|  | /* | 
|  | *  Copyright 2015 The WebRTC Project Authors. All rights reserved. | 
|  | * | 
|  | *  Use of this source code is governed by a BSD-style license | 
|  | *  that can be found in the LICENSE file in the root of the source | 
|  | *  tree. An additional intellectual property rights grant can be found | 
|  | *  in the file PATENTS.  All contributing project authors may | 
|  | *  be found in the AUTHORS file in the root of the source tree. | 
|  | */ | 
|  |  | 
|  | #import <Foundation/Foundation.h> | 
|  |  | 
|  | @class RTCSessionDescription; | 
|  |  | 
|  | @interface ARDSDPUtils : NSObject | 
|  |  | 
|  | // Updates the original SDP description to instead prefer the specified video | 
|  | // codec. We do this by placing the specified codec at the beginning of the | 
|  | // codec list if it exists in the sdp. | 
|  | + (RTCSessionDescription *) | 
|  | descriptionForDescription:(RTCSessionDescription *)description | 
|  | preferredVideoCodec:(NSString *)codec; | 
|  |  | 
|  | @end |