Add even more of the source
This should be about everything needed to build so far?
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167
APIModules/QTSSReflectorModule/ReflectorOutput.h
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167
APIModules/QTSSReflectorModule/ReflectorOutput.h
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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File: ReflectorOutput.h
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Contains: VERY simple abstract base class that defines one virtual method, WritePacket.
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This is extremely useful to the reflector, which, using one of these objects,
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can transparently reflect a packet, not being aware of how it will actually be
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written to the network
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*/
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#ifndef __REFLECTOR_OUTPUT_H__
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#define __REFLECTOR_OUTPUT_H__
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#include "QTSS.h"
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#include "StrPtrLen.h"
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#include "OSHeaders.h"
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#include "MyAssert.h"
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#include "OS.h"
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#include "OSQueue.h"
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class ReflectorOutput
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{
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public:
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ReflectorOutput() : fBookmarkedPacketsElemsArray(NULL), fNumBookmarks(0), fAvailPosition(0), fLastIntervalMilliSec(5), fLastPacketTransmitTime(0) {}
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virtual ~ReflectorOutput()
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{
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if ( fBookmarkedPacketsElemsArray )
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{ ::memset( fBookmarkedPacketsElemsArray, 0, sizeof ( OSQueueElem* ) * fNumBookmarks );
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delete [] fBookmarkedPacketsElemsArray;
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}
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}
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// an array of packet elements ( from fPacketQueue in ReflectorSender )
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// possibly one for each ReflectorSender that sends data to this ReflectorOutput
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OSQueueElem **fBookmarkedPacketsElemsArray;
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UInt32 fNumBookmarks;
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SInt32 fAvailPosition;
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QTSS_TimeVal fLastIntervalMilliSec;
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QTSS_TimeVal fLastPacketTransmitTime;
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Bool16 fNewOutput;
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inline OSQueueElem* GetBookMarkedPacket(OSQueue *thePacketQueue);
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inline Bool16 SetBookMarkPacket(OSQueueElem* thePacketElemPtr);
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// WritePacket
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//
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// Pass in the packet contents, the cookie of the stream to which it will be written,
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// and the QTSS API write flags (this should either be qtssWriteFlagsIsRTP or IsRTCP
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// packetLateness is how many MSec's late this packet is in being delivered ( will be < 0 if its early )
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// If this function returns QTSS_WouldBlock, timeToSendThisPacketAgain will
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// be set to # of msec in which the packet can be sent, or -1 if unknown
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virtual QTSS_Error WritePacket(StrPtrLen* inPacket, void* inStreamCookie, UInt32 inFlags, SInt64 packetLatenessInMSec, SInt64* timeToSendThisPacketAgain, UInt64* packetIDPtr, SInt64* arrivalTimeMSec, Bool16 firstPacket ) = 0;
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virtual void TearDown() = 0;
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virtual Bool16 IsUDP() = 0;
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virtual Bool16 IsPlaying() = 0;
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enum { kWaitMilliSec = 5, kMaxWaitMilliSec = 1000 };
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protected:
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void InititializeBookmarks( UInt32 numStreams )
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{
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// need 2 bookmarks for each stream ( include RTCPs )
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UInt32 numBookmarks = numStreams * 2;
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fBookmarkedPacketsElemsArray = new OSQueueElem*[numBookmarks];
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::memset( fBookmarkedPacketsElemsArray, 0, sizeof ( OSQueueElem* ) * numBookmarks );
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fNumBookmarks = numBookmarks;
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}
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};
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Bool16 ReflectorOutput::SetBookMarkPacket(OSQueueElem* thePacketElemPtr)
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{
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if (fAvailPosition != -1 && thePacketElemPtr)
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{
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fBookmarkedPacketsElemsArray[fAvailPosition] = thePacketElemPtr;
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for (UInt32 i = 0; i < fNumBookmarks; i++)
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{
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if (fBookmarkedPacketsElemsArray[i] == NULL)
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{
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fAvailPosition = i;
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return true;
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}
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}
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}
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return false;
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}
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OSQueueElem* ReflectorOutput::GetBookMarkedPacket(OSQueue *thePacketQueue)
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{
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Assert(thePacketQueue != NULL);
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OSQueueElem* packetElem = NULL;
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UInt32 curBookmark = 0;
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fAvailPosition = -1;
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Assert( curBookmark < fNumBookmarks );
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// see if we've bookmarked a held packet for this Sender in this Output
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while ( curBookmark < fNumBookmarks )
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{
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OSQueueElem* bookmarkedElem = fBookmarkedPacketsElemsArray[curBookmark];
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if ( bookmarkedElem ) // there may be holes in this array
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{
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if ( bookmarkedElem->IsMember( *thePacketQueue ) )
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{
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// this packet was previously bookmarked for this specific queue
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// remove if from the bookmark list and use it
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// to jump ahead into the Sender's over all packet queue
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fBookmarkedPacketsElemsArray[curBookmark] = NULL;
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fAvailPosition = curBookmark;
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packetElem = bookmarkedElem;
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break;
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}
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}
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else
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{
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fAvailPosition = curBookmark;
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}
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curBookmark++;
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}
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return packetElem;
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}
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#endif //__REFLECTOR_OUTPUT_H__
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