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/*
* 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 */
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