/**

  * @file

  * high precision timer, useful to profile code
  *
  * 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
  */
 
 #ifndef AVUTIL_TIMER_H
 #define AVUTIL_TIMER_H
 
 #include <stdlib.h>
 #include <stdint.h>
 #include "config.h"
 

 #if   ARCH_ARM
 #   include "arm/timer.h"
 #elif ARCH_BFIN

 #   include "bfin/timer.h"
 #elif ARCH_PPC
 #   include "ppc/timer.h"
 #elif ARCH_X86
 #   include "x86/timer.h"

 #endif

 
 #if !defined(AV_READ_TIME) && HAVE_GETHRTIME
 #   define AV_READ_TIME gethrtime

 #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;\
     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){\
         av_log(NULL, AV_LOG_ERROR, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n",\
                tsum*10/tcount, id, tcount, tskip_count);\
     }\
 }
 #else
 #define START_TIMER
 #define STOP_TIMER(id) {}
 #endif
 
 #endif /* AVUTIL_TIMER_H */