1/** 2 * @file 3 * high precision timer, useful to profile code 4 * 5 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#ifndef AVUTIL_TIMER_H 25#define AVUTIL_TIMER_H 26 27#include <stdlib.h> 28#include <stdint.h> 29#include "config.h" 30 31#if ARCH_ARM 32# include "arm/timer.h" 33#elif ARCH_BFIN 34# include "bfin/timer.h" 35#elif ARCH_PPC 36# include "ppc/timer.h" 37#elif ARCH_X86 38# include "x86/timer.h" 39#endif 40 41#if !defined(AV_READ_TIME) && HAVE_GETHRTIME 42# define AV_READ_TIME gethrtime 43#endif 44 45#ifdef AV_READ_TIME 46#define START_TIMER \ 47uint64_t tend;\ 48uint64_t tstart= AV_READ_TIME();\ 49 50#define STOP_TIMER(id) \ 51tend= AV_READ_TIME();\ 52{\ 53 static uint64_t tsum=0;\ 54 static int tcount=0;\ 55 static int tskip_count=0;\ 56 if(tcount<2 || tend - tstart < 8*tsum/tcount || tend - tstart < 2000){\ 57 tsum+= tend - tstart;\ 58 tcount++;\ 59 }else\ 60 tskip_count++;\ 61 if(((tcount+tskip_count)&(tcount+tskip_count-1))==0){\ 62 av_log(NULL, AV_LOG_ERROR, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n",\ 63 tsum*10/tcount, id, tcount, tskip_count);\ 64 }\ 65} 66#else 67#define START_TIMER 68#define STOP_TIMER(id) {} 69#endif 70 71#endif /* AVUTIL_TIMER_H */ 72