2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * high precision timer, useful to profile code
26 #ifndef AVUTIL_TIMER_H
27 #define AVUTIL_TIMER_H
35 #if HAVE_MACH_MACH_TIME_H
36 #include <mach/mach_time.h>
42 # include "aarch64/timer.h"
44 # include "arm/timer.h"
46 # include "ppc/timer.h"
48 # include "x86/timer.h"
51 #if !defined(AV_READ_TIME)
53 # define AV_READ_TIME gethrtime
54 # elif HAVE_MACH_ABSOLUTE_TIME
55 # define AV_READ_TIME mach_absolute_time
59 #ifndef FF_TIMER_UNITS
60 # define FF_TIMER_UNITS "UNITS"
66 uint64_t tstart = AV_READ_TIME(); \
68 #define STOP_TIMER(id) \
69 tend = AV_READ_TIME(); \
71 static uint64_t tsum = 0; \
72 static int tcount = 0; \
73 static int tskip_count = 0; \
74 static int thistogram[32] = {0}; \
75 thistogram[av_log2(tend - tstart)]++; \
77 tend - tstart < 8 * tsum / tcount || \
78 tend - tstart < 2000) { \
79 tsum+= tend - tstart; \
83 if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
85 av_log(NULL, AV_LOG_ERROR, \
86 "%7"PRIu64" " FF_TIMER_UNITS " in %s,%8d runs,%7d skips", \
87 tsum * 10 / tcount, id, tcount, tskip_count); \
88 for (i = 0; i < 32; i++) \
89 av_log(NULL, AV_LOG_VERBOSE, " %2d", av_log2(2*thistogram[i]));\
90 av_log(NULL, AV_LOG_ERROR, "\n"); \
95 #define STOP_TIMER(id) { }
98 #endif /* AVUTIL_TIMER_H */