/*

  * 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;                                       \
         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" " FF_TIMER_UNITS " 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 */