| /* |
| * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * high precision timer, useful to profile code |
| */ |
| |
| #ifndef AVUTIL_TIMER_H |
| #define AVUTIL_TIMER_H |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| |
| #include "config.h" |
| |
| #if ARCH_ARM |
| # include "arm/timer.h" |
| #elif ARCH_BFIN |
| # include "bfin/timer.h" |
| #elif ARCH_PPC |
| # include "ppc/timer.h" |
| #elif ARCH_X86 |
| # include "x86/timer.h" |
| #endif |
| |
| #if !defined(AV_READ_TIME) && HAVE_GETHRTIME |
| # define AV_READ_TIME gethrtime |
| #endif |
| |
| #ifdef AV_READ_TIME |
| #define START_TIMER \ |
| uint64_t tend; \ |
| uint64_t tstart = AV_READ_TIME(); \ |
| |
| #define STOP_TIMER(id) \ |
| tend = AV_READ_TIME(); \ |
| { \ |
| static uint64_t tsum = 0; \ |
| static int tcount = 0; \ |
| static int tskip_count = 0; \ |
| if (tcount < 2 || \ |
| tend - tstart < 8 * tsum / tcount || \ |
| tend - tstart < 2000) { \ |
| tsum+= tend - tstart; \ |
| tcount++; \ |
| } else \ |
| tskip_count++; \ |
| if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \ |
| av_log(NULL, AV_LOG_ERROR, \ |
| "%"PRIu64" decicycles in %s, %d runs, %d skips\n", \ |
| tsum * 10 / tcount, id, tcount, tskip_count); \ |
| } \ |
| } |
| #else |
| #define START_TIMER |
| #define STOP_TIMER(id) { } |
| #endif |
| |
| #endif /* AVUTIL_TIMER_H */ |