1 files changed, 69 insertions, 0 deletions
diff --git a/services/surfaceflinger/FrameRateHelper.h b/services/surfaceflinger/FrameRateHelper.h
new file mode 100644
index 0000000..1a69fed
--- /dev/null
+++ b/services/surfaceflinger/FrameRateHelper.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ANDROID_SF_FRAME_RATE_HELPER_H
+#define ANDROID_SF_FRAME_RATE_HELPER_H
+
+#include <utils/Timers.h>
+
+namespace android {
+
+class FrameRateHelper {
+public:
+        FrameRateHelper() : mTime(0), mFps(0), mFpsCount(0) {}
+        ~FrameRateHelper() {}
+
+    bool update() {
+        mFpsCount++;
+
+        nsecs_t now = systemTime();
+        if (ns2ms(now - mTime) > 1000) {
+            mFps = mFpsCount;
+            mFpsCount = 0;
+            mTime = now;
+            return true;
+        }
+
+        return false;
+    }
+
+    unsigned int get() const {
+        return mFps;
+    }
+
+private:
+    nsecs_t mTime;
+    unsigned int mFps;
+    unsigned int mFpsCount;
+};
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_SF_FRAME_RATE_HELPER_H