hwcontext: Add device derivation
[ffmpeg.git] / libavutil / timer.h
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
33 #include "config.h"
34
35 #if HAVE_MACH_MACH_TIME_H
36 #include <mach/mach_time.h>
37 #endif
38
39 #include "log.h"
40
41 #if   ARCH_AARCH64
42 #   include "aarch64/timer.h"
43 #elif ARCH_ARM
44 #   include "arm/timer.h"
45 #elif ARCH_PPC
46 #   include "ppc/timer.h"
47 #elif ARCH_X86
48 #   include "x86/timer.h"
49 #endif
50
51 #if !defined(AV_READ_TIME)
52 #   if HAVE_GETHRTIME
53 #       define AV_READ_TIME gethrtime
54 #   elif HAVE_MACH_ABSOLUTE_TIME
55 #       define AV_READ_TIME mach_absolute_time
56 #   endif
57 #endif
58
59 #ifndef FF_TIMER_UNITS
60 #   define FF_TIMER_UNITS "UNITS"
61 #endif
62
63 #ifdef AV_READ_TIME
64 #define START_TIMER                             \
65     uint64_t tend;                              \
66     uint64_t tstart = AV_READ_TIME();           \
67
68 #define STOP_TIMER(id)                                                    \
69     tend = AV_READ_TIME();                                                \
70     {                                                                     \
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)]++;                             \
76         if (tcount < 2                        ||                          \
77             tend - tstart < 8 * tsum / tcount ||                          \
78             tend - tstart < 2000) {                                       \
79             tsum+= tend - tstart;                                         \
80             tcount++;                                                     \
81         } else                                                            \
82             tskip_count++;                                                \
83         if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
84             int i;                                                        \
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");                             \
91         }                                                                 \
92     }
93 #else
94 #define START_TIMER
95 #define STOP_TIMER(id) { }
96 #endif
97
98 #endif /* AVUTIL_TIMER_H */