1/*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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
32#include "config.h"
33
34#if   ARCH_ARM
35#   include "arm/timer.h"
36#elif ARCH_BFIN
37#   include "bfin/timer.h"
38#elif ARCH_PPC
39#   include "ppc/timer.h"
40#elif ARCH_X86
41#   include "x86/timer.h"
42#endif
43
44#if !defined(AV_READ_TIME) && HAVE_GETHRTIME
45#   define AV_READ_TIME gethrtime
46#endif
47
48#ifdef AV_READ_TIME
49#define START_TIMER                             \
50    uint64_t tend;                              \
51    uint64_t tstart = AV_READ_TIME();           \
52
53#define STOP_TIMER(id)                                                    \
54    tend = AV_READ_TIME();                                                \
55    {                                                                     \
56        static uint64_t tsum   = 0;                                       \
57        static int tcount      = 0;                                       \
58        static int tskip_count = 0;                                       \
59        if (tcount < 2                        ||                          \
60            tend - tstart < 8 * tsum / tcount ||                          \
61            tend - tstart < 2000) {                                       \
62            tsum+= tend - tstart;                                         \
63            tcount++;                                                     \
64        } else                                                            \
65            tskip_count++;                                                \
66        if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
67            av_log(NULL, AV_LOG_ERROR,                                    \
68                   "%"PRIu64" decicycles in %s, %d runs, %d skips\n",     \
69                   tsum * 10 / tcount, id, tcount, tskip_count);          \
70        }                                                                 \
71    }
72#else
73#define START_TIMER
74#define STOP_TIMER(id) { }
75#endif
76
77#endif /* AVUTIL_TIMER_H */
78