libavutil/timer.h File Reference

high precision timer, useful to profile code More...

#include <stdlib.h>
#include <stdint.h>
#include "config.h"
#include "x86/timer.h"

Go to the source code of this file.

Defines

#define START_TIMER
#define STOP_TIMER(id)


Detailed Description

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

Definition in file timer.h.


Define Documentation

#define START_TIMER

Value:

uint64_t tend;\
uint64_t tstart= AV_READ_TIME();\

Definition at line 46 of file timer.h.

Referenced by av_adler32_update(), dct_quantize_refine(), and main().

#define STOP_TIMER ( id   ) 

Value:

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);\
    }\
}

Definition at line 50 of file timer.h.

Referenced by av_adler32_update(), dct_quantize_refine(), and main().


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