diff --git a/services/oboeservice/AAudioMixer.h b/services/oboeservice/AAudioMixer.h
new file mode 100644
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+++ b/services/oboeservice/AAudioMixer.h
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+/*
+ * Copyright (C) 2017 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 AAUDIO_AAUDIO_MIXER_H
+#define AAUDIO_AAUDIO_MIXER_H
+
+#include <stdint.h>
+
+#include <aaudio/AAudio.h>
+#include <fifo/FifoBuffer.h>
+
+class AAudioMixer {
+public:
+    AAudioMixer() {}
+    ~AAudioMixer();
+
+    void allocate(int32_t samplesPerFrame, int32_t framesPerBurst);
+
+    void clear();
+
+    void mix(android::FifoBuffer *fifo, float volume);
+
+    void mixPart(float *destination, float *source, int32_t numFrames, float volume);
+
+    float *getOutputBuffer();
+
+private:
+    float   *mOutputBuffer = nullptr;
+    int32_t  mSamplesPerFrame = 0;
+    int32_t  mFramesPerBurst = 0;
+    int32_t  mBufferSizeInBytes = 0;
+};
+
+
+#endif //AAUDIO_AAUDIO_MIXER_H