Add NDK Choreographer API headers
Change-Id: Ib75d3341db4e48b328b7b92497a303c01c53fc90
diff --git a/include/android/choreographer.h b/include/android/choreographer.h
new file mode 100644
index 0000000..0239e2f
--- /dev/null
+++ b/include/android/choreographer.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+/**
+ * @addtogroup Choreographer
+ * @{
+ */
+
+/**
+ * @file choreographer.h
+ */
+
+#ifndef ANDROID_CHOREOGRAPHER_H
+#define ANDROID_CHOREOGRAPHER_H
+
+__BEGIN_DECLS
+
+struct AChoreographer;
+typedef struct AChoreographer AChoreographer;
+
+/**
+ * Prototype of the function that is called when a new frame is being rendered.
+ * It's passed the time that the frame is being rendered as nanoseconds in the
+ * CLOCK_MONOTONIC time base, as well as the data pointer provided by the
+ * application that registered a callback. All callbacks that run as part of
+ * rendering a frame will observe the same frame time, so it should be used
+ * whenever events need to be synchronized (e.g. animations).
+ */
+typedef void (*AChoreographer_frameCallback)(long frameTimeNanos, void* data);
+
+/**
+ * Get the AChoreographer instance for the current thread. This must be called
+ * on an ALooper thread.
+ */
+AChoreographer* AChoreographer_getInstance();
+
+/**
+ * Post a callback to be run on the next frame. The data pointer provided will
+ * be passed to the callback function when it's called.
+ */
+void AChoreographer_postFrameCallback(AChoreographer* choreographer,
+ AChoreographer_frameCallback callback, void* data);
+/**
+ * Post a callback to be run on the frame following the specified delay. The
+ * data pointer provided will be passed to the callback function when it's
+ * called.
+ */
+void AChoreographer_postFrameCallbackDelayed(AChoreographer* choreographer,
+ AChoreographer_frameCallback callback, void* data, long delayMillis);
+__END_DECLS
+
+#endif // ANDROID_CHOREOGRAPHER_H
+
+/** @} */