1 /*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 /**
22 * @file
23 * high precision timer, useful to profile code
24 */
25
26 #ifndef AVUTIL_TIMER_H
27 #define AVUTIL_TIMER_H
28
29 #include <stdlib.h>
30 #include <stdint.h>
31 #include <inttypes.h>
32
34
35 #if HAVE_MACH_MACH_TIME_H
36 #include <mach/mach_time.h>
37 #endif
38
40
41 #if ARCH_ARM
43 #elif ARCH_PPC
45 #elif ARCH_X86
47 #endif
48
49 #if !defined(AV_READ_TIME)
50 # if HAVE_GETHRTIME
51 # define AV_READ_TIME gethrtime
52 # elif HAVE_MACH_ABSOLUTE_TIME
53 # define AV_READ_TIME mach_absolute_time
54 # endif
55 #endif
56
57 #ifndef FF_TIMER_UNITS
58 # define FF_TIMER_UNITS "UNITS"
59 #endif
60
61 #ifdef AV_READ_TIME
62 #define START_TIMER \
63 uint64_t tend; \
64 uint64_t tstart = AV_READ_TIME(); \
65
66 #define STOP_TIMER(id) \
67 tend = AV_READ_TIME(); \
68 { \
69 static uint64_t tsum = 0; \
70 static int tcount = 0; \
71 static int tskip_count = 0; \
72 static int thistogram[32] = {0}; \
73 thistogram[av_log2(tend - tstart)]++; \
74 if (tcount < 2 || \
75 tend - tstart < 8 * tsum / tcount || \
76 tend - tstart < 2000) { \
77 tsum+= tend - tstart; \
78 tcount++; \
79 } else \
80 tskip_count++; \
81 if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
82 int i; \
83 av_log(NULL, AV_LOG_ERROR, \
84 "%7"PRIu64" " FF_TIMER_UNITS " in %s,%8d runs,%7d skips", \
85 tsum * 10 / tcount, id, tcount, tskip_count); \
86 for (i = 0; i < 32; i++) \
87 av_log(NULL, AV_LOG_VERBOSE, " %2d", av_log2(2*thistogram[i]));\
88 av_log(NULL, AV_LOG_ERROR, "\n"); \
89 } \
90 }
91 #else
93 #define STOP_TIMER(id) { }
94 #endif
95
96 #endif /* AVUTIL_TIMER_H */