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1 /*
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2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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3 *
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4 * This file is part of FFmpeg.
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5 *
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6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
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8 * License as published by the Free Software Foundation; either
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9 * version 2.1 of the License, or (at your option) any later version.
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10 *
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11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Lesser General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Lesser General Public
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17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
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20
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21 /**
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22 * @file
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23 * high precision timer, useful to profile code
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24 */
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25
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26 #ifndef AVUTIL_TIMER_H
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27 #define AVUTIL_TIMER_H
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28
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29 #include <stdlib.h>
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30 #include <stdint.h>
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31 #include <inttypes.h>
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32
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33 #include "config.h"
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34
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35 #if HAVE_MACH_MACH_TIME_H
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36 #include <mach/mach_time.h>
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37 #endif
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38
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39 #include "log.h"
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40
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41 #if ARCH_ARM
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42 # include "arm/timer.h"
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43 #elif ARCH_PPC
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44 # include "ppc/timer.h"
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45 #elif ARCH_X86
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46 # include "x86/timer.h"
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47 #endif
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48
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49 #if !defined(AV_READ_TIME)
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50 # if HAVE_GETHRTIME
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51 # define AV_READ_TIME gethrtime
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52 # elif HAVE_MACH_ABSOLUTE_TIME
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53 # define AV_READ_TIME mach_absolute_time
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54 # endif
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55 #endif
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56
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57 #ifndef FF_TIMER_UNITS
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58 # define FF_TIMER_UNITS "UNITS"
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59 #endif
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60
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61 #ifdef AV_READ_TIME
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62 #define START_TIMER \
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63 uint64_t tend; \
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64 uint64_t tstart = AV_READ_TIME(); \
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65
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66 #define STOP_TIMER(id) \
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67 tend = AV_READ_TIME(); \
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68 { \
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69 static uint64_t tsum = 0; \
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70 static int tcount = 0; \
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71 static int tskip_count = 0; \
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72 if (tcount < 2 || \
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73 tend - tstart < 8 * tsum / tcount || \
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74 tend - tstart < 2000) { \
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75 tsum+= tend - tstart; \
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76 tcount++; \
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77 } else \
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78 tskip_count++; \
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79 if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
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80 av_log(NULL, AV_LOG_ERROR, \
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81 "%"PRIu64" " FF_TIMER_UNITS " in %s, %d runs, %d skips\n", \
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82 tsum * 10 / tcount, id, tcount, tskip_count); \
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83 } \
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84 }
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85 #else
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86 #define START_TIMER
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87 #define STOP_TIMER(id) { }
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88 #endif
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89
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90 #endif /* AVUTIL_TIMER_H */
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