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FrameRateAdjust.cpp

00001  /***********************************************************************
00002  *                                                                      *
00003  * ViTooKi                                                              *
00004  *                                                                      *
00005  * title: FrameRateAdjust.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:                     *
00014  * http://ViTooKi.sourceforge.net                                       *
00015  * vitooki-user@lists.sourceforge.net                                   *
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             *
00020  * modify it under the terms of the GNU General Public License          *
00021  * as published by the Free Software Foundation; either version 2       *
00022  * of the License, or (at your option) any later version.               *
00023  *                                                                      *
00024  * This program is distributed in the hope that it will be useful,      *
00025  * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
00026  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the         *
00027  * GNU General Public License for more details.                         *
00028  *                                                                      *
00029  * You should have received a copy of the GNU General Public License    *
00030  * along with this program; if not, write to the Free Software          *
00031  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,               *
00032  * MA  02111-1307, USA.                                                 *
00033  *                                                                      *
00034  ***********************************************************************/
00035 
00036  /***********************************************************************
00037  *                                                                      *
00038  *  REVISION HISTORY:                                                   *
00039  *                                                                      *
00040  *                                                                      *
00041  *                                                                      *
00042  ***********************************************************************/
00043 
00044 #include "FrameRateAdjust.hpp"
00045 #include "UncompressedVideoFrame.hpp"
00046 
00047 
00048 /***************************************************************/
00049 FrameRateAdjust::FrameRateAdjust(ESInfo *esi, u32 newTimeIncrement) {
00050 
00051         es = esi;
00052         timeInc = newTimeIncrement;
00053         oldTimeInc = es->getVOPTimeIncrement(); 
00054         //      es->setVOPTimeIncrement(timeInc);
00055         strcpy(name,"FrameRateAdjust");
00056         currentFrameNumber = 0;
00057         currentTicks = 0;
00058 
00059         dprintf_full("FrameRateAdjust (from %i to %i timeInc)\n", oldTimeInc, timeInc);
00060 }
00061 
00062 
00063 /***************************************************************/
00064 FrameRateAdjust::~FrameRateAdjust() {
00065 }
00066 
00067 
00068 /***************************************************************/
00069 void FrameRateAdjust::initialize() {
00070 }
00071 
00072 
00073 /***************************************************************/
00074 list < Frame * > FrameRateAdjust::adapt(Frame * frm) {
00075         list < Frame * >tmp;
00076         u32 thisCTS;
00077         int thisSec;
00078 
00079         thisCTS = frm->getAU()->cts;
00080         thisSec = (int)floor((double)thisCTS / es->getMediaTimeScale());
00081         dprintf_full("FrameRateAdjust::adapt frame CTS %i (dropped until %i), VOP increment %i, playoutSec: %i \n",
00082                                                          thisCTS, currentTicks, oldTimeInc, thisSec );
00083 
00084         currentFrameNumber++;
00085         if (oldTimeInc <= timeInc) { // remove some frames
00086                 if (thisCTS >= currentTicks) {
00087                         //standard forwarding adaptor behaviour
00088                         tmp.push_front(frm);
00089                         currentTicks += timeInc;
00090                 } else {
00091                         //this frame is dropped....
00092                         dprintf_full("FrameRateAdjust::adapt: this frame %p is dropped (will be deleted by AdaptorChain)....\n",frm);
00093                 }
00094         } else {  // add some frames
00095                 dprintf_err("FrameRateAdjust::adapt should add frames now (from %i to %i timeInc)... NOT SUPPORTED!\n",
00096                                                                 oldTimeInc,timeInc);
00097                 ::exit(1);
00098         }
00099 
00100         return tmp;
00101 }