1 files changed, 78 insertions, 0 deletions
diff --git a/ffmpeg/libavutil/timer.h b/ffmpeg/libavutil/timer.h
new file mode 100644
index 0000000..3e242f3
--- /dev/null
+++ b/ffmpeg/libavutil/timer.h
@@ -0,0 +1,78 @@
+/*
+ * 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 <inttypes.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 */