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CuttingAdaptor.cpp

00001  /***********************************************************************
00002  *                                                                      *
00003  * ViTooKi                                                              *
00004  *                                                                      *
00005  * title:       CuttingAdaptor.cpp                                            *
00006  *                                                                      *
00007  *                                                                      *
00008  *                                                                      *
00009  * ITEC institute of the University of Klagenfurt (Austria)             *
00010  * http://www.itec.uni-klu.ac.at                                        *
00011  *                                                                      *
00012  *                                                                      *
00013  * For more information visit the ViTooKi homepage:                     *
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00016  * vitooki-devel@lists.sourceforge.net                                  *
00017  *                                                                      *
00018  * This file is part of ViTooKi, a free video toolkit.                  *
00019  * ViTooKi is free software; you can redistribute it and/or             *
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00021  * as published by the Free Software Foundation; either version 2       *
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00023  *                                                                      *
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00027  * GNU General Public License for more details.                         *
00028  *                                                                      *
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00033  *                                                                      *
00034  ***********************************************************************/
00035 
00036  /***********************************************************************
00037  *                                                                      *
00038  *  REVISION HISTORY:                                                   *
00039  *                                                                      *
00040  *                                                                      *
00041  *                                                                      *
00042  ***********************************************************************/
00043 
00044 #include "CuttingAdaptor.hpp"
00045 
00046 
00047 CuttingAdaptor::CuttingAdaptor(ESInfo *esi, double start, double end) {
00048 
00049         es = esi;
00050         startSec = start;
00051         endSec = end;
00052         startTS = (u32)(startSec * es->getMediaTimeScale());
00053         endTS = (u32)(endSec * es->getMediaTimeScale());
00054         IVOPseen = false;
00055         strcpy(name,"CuttingAdaptor");
00056 }
00057 
00058 
00059 CuttingAdaptor::~CuttingAdaptor() {
00060 }
00061 
00062 
00063 void CuttingAdaptor::initialize() {
00064 }
00065 
00066 
00067 /***************************************************************/
00068 list < Frame * > CuttingAdaptor::adapt(Frame * frm) {
00069         list < Frame * >tmp;
00070         u32 thisCTS;
00071         int thisSec;
00072 
00073         thisCTS = frm->getAU()->cts;
00074         thisSec = (int)floor((double)thisCTS / es->getMediaTimeScale());
00075         dprintf_full("CuttingAdaptor::adapt frame CTS %i, VOP increment %i, playoutSec: %i\n",
00076                                                          thisCTS, es->getVOPTimeIncrement(), thisSec );
00077 
00078         if ( (thisCTS >= startTS) && (thisCTS <= endTS) ) { //in range, so keep frame!
00079                 if (!IVOPseen) {//search for first I-frame
00080                         if ( ((es->isVisualStream() &&  (frm->getType() == Frame::I_VOP))) ||
00081                                          es->isAudioStream() ||
00082                                          (frm->getType() == Frame::UNKNOWN_VOP) ) 
00083                                 IVOPseen=true;
00084                 }
00085                 //standard forwarding adaptor behaviour
00086                 if (IVOPseen)
00087                         tmp.push_front(frm);
00088         }
00089 
00090         return tmp;
00091 }