yading@11: /*
yading@11:  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: /**
yading@11:  * @file
yading@11:  * high precision timer, useful to profile code
yading@11:  */
yading@11: 
yading@11: #ifndef AVUTIL_TIMER_H
yading@11: #define AVUTIL_TIMER_H
yading@11: 
yading@11: #include <stdlib.h>
yading@11: #include <stdint.h>
yading@11: #include <inttypes.h>
yading@11: 
yading@11: #include "config.h"
yading@11: 
yading@11: #if   ARCH_ARM
yading@11: #   include "arm/timer.h"
yading@11: #elif ARCH_BFIN
yading@11: #   include "bfin/timer.h"
yading@11: #elif ARCH_PPC
yading@11: #   include "ppc/timer.h"
yading@11: #elif ARCH_X86
yading@11: #   include "x86/timer.h"
yading@11: #endif
yading@11: 
yading@11: #if !defined(AV_READ_TIME) && HAVE_GETHRTIME
yading@11: #   define AV_READ_TIME gethrtime
yading@11: #endif
yading@11: 
yading@11: #ifdef AV_READ_TIME
yading@11: #define START_TIMER                             \
yading@11:     uint64_t tend;                              \
yading@11:     uint64_t tstart = AV_READ_TIME();           \
yading@11: 
yading@11: #define STOP_TIMER(id)                                                    \
yading@11:     tend = AV_READ_TIME();                                                \
yading@11:     {                                                                     \
yading@11:         static uint64_t tsum   = 0;                                       \
yading@11:         static int tcount      = 0;                                       \
yading@11:         static int tskip_count = 0;                                       \
yading@11:         if (tcount < 2                        ||                          \
yading@11:             tend - tstart < 8 * tsum / tcount ||                          \
yading@11:             tend - tstart < 2000) {                                       \
yading@11:             tsum+= tend - tstart;                                         \
yading@11:             tcount++;                                                     \
yading@11:         } else                                                            \
yading@11:             tskip_count++;                                                \
yading@11:         if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
yading@11:             av_log(NULL, AV_LOG_ERROR,                                    \
yading@11:                    "%"PRIu64" decicycles in %s, %d runs, %d skips\n",     \
yading@11:                    tsum * 10 / tcount, id, tcount, tskip_count);          \
yading@11:         }                                                                 \
yading@11:     }
yading@11: #else
yading@11: #define START_TIMER
yading@11: #define STOP_TIMER(id) { }
yading@11: #endif
yading@11: 
yading@11: #endif /* AVUTIL_TIMER_H */