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diff --git a/libaudio/ReSampler.h b/libaudio/ReSampler.h
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+++ b/libaudio/ReSampler.h
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+/*
+** Copyright 2008, 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 ANDROID_RESAMPLER_H
+#define ANDROID_RESAMPLER_H
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <hardware_legacy/AudioSystemLegacy.h>
+#include "speex/speex_resampler.h"
+
+namespace android_audio_legacy {
+
+class ReSampler {
+public:
+
+    class BufferProvider
+    {
+    public:
+
+        struct Buffer {
+            union {
+                void*       raw;
+                short*      i16;
+                int8_t*     i8;
+            };
+            size_t frameCount;
+        };
+
+        virtual ~BufferProvider() {}
+
+        virtual status_t getNextBuffer(Buffer* buffer) = 0;
+        virtual void releaseBuffer(Buffer* buffer) = 0;
+    };
+
+    ReSampler(uint32_t inSampleRate,
+              uint32_t outSampleRate,
+              uint32_t channelCount,
+              BufferProvider* provider);
+
+    virtual ~ReSampler();
+
+            status_t initCheck() { return mStatus; }
+            void reset();
+            int resample(int16_t* out, size_t *outFrameCount);
+            int32_t delayNs();
+
+
+private:
+    status_t    mStatus;                    // init status
+    SpeexResamplerState *mSpeexResampler;   // handle on speex resampler
+    BufferProvider* mProvider;              // buffer provider installed by client
+    uint32_t mInSampleRate;                 // input sampling rate
+    uint32_t mOutSampleRate;                // output sampling rate
+    uint32_t mChannelCount;                 // number of channels
+    int16_t *mInBuf;                        // input buffer
+    size_t mInBufSize;                      // input buffer size
+    size_t mFramesIn;                       // number of frames in input buffer
+    size_t mFramesRq;                       // cached number of output frames
+    size_t mFramesNeeded;                   // minimum number of input frames to produce mFramesRq
+                                            // output frames
+    int32_t mSpeexDelayNs;                  // delay introduced by speex resampler in ns
+};
+
+}; // namespace android_audio_legacy
+
+#endif // ANDROID_RESAMPLER_H