Initial WebM release

1 files changed, 96 insertions, 0 deletions

diff --git a/vpx_ports/vpx_timer.h b/vpx_ports/vpx_timer.h
new file mode 100644
index 000000000..5c045387f
--- /dev/null
+++ b/vpx_ports/vpx_timer.h
@@ -0,0 +1,96 @@
+/*
+ *  Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license and patent
+ *  grant that can be found in the LICENSE file in the root of the source
+ *  tree. All contributing project authors may be found in the AUTHORS
+ *  file in the root of the source tree.
+ */
+
+
+#ifndef VPX_TIMER_H
+#define VPX_TIMER_H
+
+#if defined(_MSC_VER)
+/*
+ * Win32 specific includes
+ */
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#else
+/*
+ * POSIX specific includes
+ */
+#include <sys/time.h>
+
+/* timersub is not provided by msys at this time. */
+#ifndef timersub
+#define timersub(a, b, result) \
+    do { \
+        (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
+        (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
+        if ((result)->tv_usec < 0) { \
+            --(result)->tv_sec; \
+            (result)->tv_usec += 1000000; \
+        } \
+    } while (0)
+#endif
+#endif
+
+
+struct vpx_usec_timer
+{
+#if defined(_MSC_VER)
+    LARGE_INTEGER  begin, end;
+#else
+    struct timeval begin, end;
+#endif
+};
+
+
+static INLINE void
+vpx_usec_timer_start(struct vpx_usec_timer *t)
+{
+#if defined(_MSC_VER)
+    QueryPerformanceCounter(&t->begin);
+#else
+    gettimeofday(&t->begin, NULL);
+#endif
+}
+
+
+static INLINE void
+vpx_usec_timer_mark(struct vpx_usec_timer *t)
+{
+#if defined(_MSC_VER)
+    QueryPerformanceCounter(&t->end);
+#else
+    gettimeofday(&t->end, NULL);
+#endif
+}
+
+
+static INLINE long
+vpx_usec_timer_elapsed(struct vpx_usec_timer *t)
+{
+#if defined(_MSC_VER)
+    LARGE_INTEGER freq, diff;
+
+    diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
+
+    if (QueryPerformanceFrequency(&freq) && diff.QuadPart < freq.QuadPart)
+        return (long)(diff.QuadPart * 1000000 / freq.QuadPart);
+
+    return 1000000;
+#else
+    struct timeval diff;
+
+    timersub(&t->end, &t->begin, &diff);
+    return diff.tv_sec ? 1000000 : diff.tv_usec;
+#endif
+}
+
+
+#endif