1 files changed, 49 insertions, 0 deletions
diff --git a/libs/hwui/renderthread/TimeLord.h b/libs/hwui/renderthread/TimeLord.h
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+++ b/libs/hwui/renderthread/TimeLord.h
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+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef TIMELORD_H
+#define TIMELORD_H
+
+#include <utils/Timers.h>
+
+namespace android {
+namespace uirenderer {
+namespace renderthread {
+
+class RenderThread;
+
+// This class serves as a helper to filter & manage frame times from multiple sources
+// ensuring that time flows linearly and smoothly
+class TimeLord {
+public:
+    void setFrameInterval(nsecs_t intervalNanos) { mFrameIntervalNanos = intervalNanos; }
+    void vsyncReceived(nsecs_t vsync);
+    nsecs_t frameTimeMs();
+
+private:
+    friend class RenderThread;
+
+    TimeLord();
+    ~TimeLord() {}
+
+    nsecs_t mFrameIntervalNanos;
+    nsecs_t mFrameTimeNanos;
+};
+
+} /* namespace renderthread */
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif /* TIMELORD_H */