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1 /**
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2 * @file
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3 * high precision timer, useful to profile code
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4 *
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5 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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6 *
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7 * This file is part of FFmpeg.
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8 *
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9 * FFmpeg is free software; you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public
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11 * License as published by the Free Software Foundation; either
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12 * version 2.1 of the License, or (at your option) any later version.
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13 *
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14 * FFmpeg is distributed in the hope that it will be useful,
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15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with FFmpeg; if not, write to the Free Software
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21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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22 */
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23
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24 #ifndef AVUTIL_TIMER_H
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25 #define AVUTIL_TIMER_H
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26
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27 #include <stdlib.h>
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28 #include <stdint.h>
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29 #include "config.h"
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30
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31 #if ARCH_ARM
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32 # include "arm/timer.h"
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33 #elif ARCH_PPC
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34 # include "ppc/timer.h"
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35 #elif ARCH_X86
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36 # include "x86/timer.h"
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37 #endif
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38
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39 #if !defined(AV_READ_TIME) && HAVE_GETHRTIME
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40 # define AV_READ_TIME gethrtime
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41 #endif
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42
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43 #ifdef AV_READ_TIME
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44 #define START_TIMER \
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45 uint64_t tend;\
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46 uint64_t tstart= AV_READ_TIME();\
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47
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48 #define STOP_TIMER(id) \
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49 tend= AV_READ_TIME();\
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50 {\
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51 static uint64_t tsum=0;\
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52 static int tcount=0;\
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53 static int tskip_count=0;\
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54 if(tcount<2 || tend - tstart < 8*tsum/tcount || tend - tstart < 2000){\
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55 tsum+= tend - tstart;\
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56 tcount++;\
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57 }else\
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58 tskip_count++;\
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59 if(((tcount+tskip_count)&(tcount+tskip_count-1))==0){\
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60 av_log(NULL, AV_LOG_ERROR, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n",\
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61 tsum*10/tcount, id, tcount, tskip_count);\
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62 }\
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63 }
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64 #else
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65 #define START_TIMER
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66 #define STOP_TIMER(id) {}
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67 #endif
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68
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69 #endif /* AVUTIL_TIMER_H */
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