timer.h
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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 
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 */