/* * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2008 Apple Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ * */ /* File: SequenceNumberMap.h Contains: Data structure for keeping track of duplicate sequence numbers. Useful for removing duplicate packets from an RTP stream. */ #ifndef _SEQUENCE_NUMBER_MAP_H_ #define _SEQUENCE_NUMBER_MAP_H_ #include "OSHeaders.h" #define SEQUENCENUMBERMAPTESTING 1 class SequenceNumberMap { public: enum { kDefaultSlidingWindowSize = 256 }; SequenceNumberMap(UInt32 inSlidingWindowSize = kDefaultSlidingWindowSize); ~SequenceNumberMap() { delete [] fSlidingWindow; } // Returns whether this sequence number was already added or not. Bool16 AddSequenceNumber(UInt16 inSeqNumber); #if SEQUENCENUMBERMAPTESTING static void Test(); #endif private: Bool16* fSlidingWindow; const SInt32 fWindowSize; const SInt32 fNegativeWindowSize; UInt16 fHighestSeqIndex; UInt16 fHighestSeqNumber; }; #endif