2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
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.
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.
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
23 * high precision timer, useful to profile code
26 #ifndef AVUTIL_TIMER_H
27 #define AVUTIL_TIMER_H
38 # include "arm/timer.h"
40 # include "bfin/timer.h"
42 # include "ppc/timer.h"
44 # include "x86/timer.h"
47 #if !defined(AV_READ_TIME) && HAVE_GETHRTIME
48 # define AV_READ_TIME gethrtime
54 uint64_t tstart = AV_READ_TIME(); \
56 #define STOP_TIMER(id) \
57 tend = AV_READ_TIME(); \
59 static uint64_t tsum = 0; \
60 static int tcount = 0; \
61 static int tskip_count = 0; \
63 tend - tstart < 8 * tsum / tcount || \
64 tend - tstart < 2000) { \
65 tsum+= tend - tstart; \
69 if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
70 av_log(NULL, AV_LOG_ERROR, \
71 "%"PRIu64" decicycles in %s, %d runs, %d skips\n", \
72 tsum * 10 / tcount, id, tcount, tskip_count); \
77 #define STOP_TIMER(id) { }
80 #endif /* AVUTIL_TIMER_H */