Android Build Tools

Android/android-ndk-r27d/sources/android/ndk_helper/interpolator.h

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+/*
+ * Copyright 2013 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.
+ */
+
+#pragma once
+
+#include <jni.h>
+#include <errno.h>
+#include <time.h>
+#include "JNIHelper.h"
+#include "perfMonitor.h"
+#include <list>
+
+namespace ndk_helper
+{
+
+enum INTERPOLATOR_TYPE
+{
+    INTERPOLATOR_TYPE_LINEAR,
+    INTERPOLATOR_TYPE_EASEINQUAD,
+    INTERPOLATOR_TYPE_EASEOUTQUAD,
+    INTERPOLATOR_TYPE_EASEINOUTQUAD,
+    INTERPOLATOR_TYPE_EASEINCUBIC,
+    INTERPOLATOR_TYPE_EASEOUTCUBIC,
+    INTERPOLATOR_TYPE_EASEINOUTCUBIC,
+    INTERPOLATOR_TYPE_EASEINQUART,
+    INTERPOLATOR_TYPE_EASEINEXPO,
+    INTERPOLATOR_TYPE_EASEOUTEXPO,
+};
+
+struct InterpolatorParams
+{
+    float dest_value_;
+    INTERPOLATOR_TYPE type_;
+    double duration_;
+};
+
+/******************************************************************
+ * Interpolates values with several interpolation methods
+ */
+class Interpolator
+{
+private:
+    double start_time_;
+    double dest_time_;
+    INTERPOLATOR_TYPE type_;
+
+    float start_value_;
+    float dest_value_;
+    std::list<InterpolatorParams> list_params_;
+
+    float GetFormula( const INTERPOLATOR_TYPE type,
+            const float t,
+            const float b,
+            const float d,
+            const float c );
+public:
+    Interpolator();
+    ~Interpolator();
+
+    Interpolator& Set( const float start,
+            const float dest,
+            const INTERPOLATOR_TYPE type,
+            double duration );
+
+    Interpolator& Add( const float dest,
+            const INTERPOLATOR_TYPE type,
+            const double duration );
+
+    bool Update( const double currentTime, float& p );
+
+    void Clear();
+};
+
+}   //namespace ndkHelper