text: /**
   * @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 */
  