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