/** * @file * high precision timer, useful to profile code * * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVUTIL_TIMER_H #define AVUTIL_TIMER_H #include <stdlib.h> #include <stdint.h> #include "config.h" #if ARCH_ARM # include "arm/timer.h" #elif ARCH_BFIN # include "bfin/timer.h" #elif ARCH_PPC # include "ppc/timer.h" #elif ARCH_X86 # include "x86/timer.h" #endif #if !defined(AV_READ_TIME) && HAVE_GETHRTIME # define AV_READ_TIME gethrtime #endif #ifdef AV_READ_TIME #define START_TIMER \ uint64_t tend;\ uint64_t tstart= AV_READ_TIME();\ #define STOP_TIMER(id) \ tend= AV_READ_TIME();\ {\ static uint64_t tsum=0;\ static int tcount=0;\ static int tskip_count=0;\ if(tcount<2 || tend - tstart < 8*tsum/tcount || tend - tstart < 2000){\ tsum+= tend - tstart;\ tcount++;\ }else\ tskip_count++;\ if(((tcount+tskip_count)&(tcount+tskip_count-1))==0){\ av_log(NULL, AV_LOG_ERROR, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n",\ tsum*10/tcount, id, tcount, tskip_count);\ }\ } #else #define START_TIMER #define STOP_TIMER(id) {} #endif #endif /* AVUTIL_TIMER_H */