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