1/* 2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of Libav. 5 * 6 * Libav is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * Libav is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with Libav; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 * @file 23 * high precision timer, useful to profile code 24 */ 25 26#ifndef AVUTIL_TIMER_H 27#define AVUTIL_TIMER_H 28 29#include <stdlib.h> 30#include <stdint.h> 31 32#include "config.h" 33 34#if ARCH_ARM 35# include "arm/timer.h" 36#elif ARCH_BFIN 37# include "bfin/timer.h" 38#elif ARCH_PPC 39# include "ppc/timer.h" 40#elif ARCH_X86 41# include "x86/timer.h" 42#endif 43 44#if !defined(AV_READ_TIME) && HAVE_GETHRTIME 45# define AV_READ_TIME gethrtime 46#endif 47 48#ifdef AV_READ_TIME 49#define START_TIMER \ 50 uint64_t tend; \ 51 uint64_t tstart = AV_READ_TIME(); \ 52 53#define STOP_TIMER(id) \ 54 tend = AV_READ_TIME(); \ 55 { \ 56 static uint64_t tsum = 0; \ 57 static int tcount = 0; \ 58 static int tskip_count = 0; \ 59 if (tcount < 2 || \ 60 tend - tstart < 8 * tsum / tcount || \ 61 tend - tstart < 2000) { \ 62 tsum+= tend - tstart; \ 63 tcount++; \ 64 } else \ 65 tskip_count++; \ 66 if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \ 67 av_log(NULL, AV_LOG_ERROR, \ 68 "%"PRIu64" decicycles in %s, %d runs, %d skips\n", \ 69 tsum * 10 / tcount, id, tcount, tskip_count); \ 70 } \ 71 } 72#else 73#define START_TIMER 74#define STOP_TIMER(id) { } 75#endif 76 77#endif /* AVUTIL_TIMER_H */ 78