/* * 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 */ /** * @file * high precision timer, useful to profile code */ #ifndef AVUTIL_TIMER_H #define AVUTIL_TIMER_H #include <stdlib.h> #include <stdint.h> #include <inttypes.h> #include "config.h" #if HAVE_MACH_MACH_TIME_H #include <mach/mach_time.h> #endif #include "log.h" #if ARCH_ARM # include "arm/timer.h" #elif ARCH_PPC # include "ppc/timer.h" #elif ARCH_X86 # include "x86/timer.h" #endif #if !defined(AV_READ_TIME) # if HAVE_GETHRTIME # define AV_READ_TIME gethrtime # elif HAVE_MACH_ABSOLUTE_TIME # define AV_READ_TIME mach_absolute_time # endif #endif #ifndef FF_TIMER_UNITS # define FF_TIMER_UNITS "UNITS" #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; \ static int thistogram[32] = {0}; \ thistogram[av_log2(tend - tstart)]++; \ 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) { \ int i; \ av_log(NULL, AV_LOG_ERROR, \ "%7"PRIu64" " FF_TIMER_UNITS " in %s,%8d runs,%7d skips", \ tsum * 10 / tcount, id, tcount, tskip_count); \ for (i = 0; i < 32; i++) \ av_log(NULL, AV_LOG_VERBOSE, " %2d", av_log2(2*thistogram[i]));\ av_log(NULL, AV_LOG_ERROR, "\n"); \ } \ } #else #define START_TIMER #define STOP_TIMER(id) { } #endif #endif /* AVUTIL_TIMER_H */