diff --git a/libs/audioflinger/AudioFlinger.h b/libs/audioflinger/AudioFlinger.h
new file mode 100644
index 0000000..8c02617
--- /dev/null
+++ b/libs/audioflinger/AudioFlinger.h
@@ -0,0 +1,490 @@
+/* //device/include/server/AudioFlinger/AudioFlinger.h
+**
+** Copyright 2007, 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_AUDIO_FLINGER_H
+#define ANDROID_AUDIO_FLINGER_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <media/IAudioFlinger.h>
+#include <media/IAudioTrack.h>
+#include <media/IAudioRecord.h>
+#include <media/AudioTrack.h>
+
+#include <utils/Atomic.h>
+#include <utils/Errors.h>
+#include <utils/threads.h>
+#include <utils/MemoryDealer.h>
+#include <utils/KeyedVector.h>
+#include <utils/SortedVector.h>
+
+#include <hardware/AudioHardwareInterface.h>
+
+#include "AudioBufferProvider.h"
+
+namespace android {
+
+class audio_track_cblk_t;
+class AudioMixer;
+class AudioBuffer;
+
+// ----------------------------------------------------------------------------
+
+#define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
+#define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))
+
+// ----------------------------------------------------------------------------
+
+class AudioFlinger : public BnAudioFlinger, protected Thread
+{
+public:
+    static void instantiate();
+
+    virtual     status_t    dump(int fd, const Vector<String16>& args);
+
+    // Thread virtuals
+    virtual     bool        threadLoop();
+    virtual     status_t    readyToRun();
+    virtual     void        onFirstRef();
+
+    // IAudioFlinger interface
+    virtual sp<IAudioTrack> createTrack(
+                                pid_t pid,
+                                int streamType,
+                                uint32_t sampleRate,
+                                int format,
+                                int channelCount,
+                                int bufferCount,
+                                uint32_t flags);
+
+    virtual     uint32_t    sampleRate() const;
+    virtual     int         channelCount() const;
+    virtual     int         format() const;
+    virtual     size_t      frameCount() const;
+
+    virtual     status_t    setMasterVolume(float value);
+    virtual     status_t    setMasterMute(bool muted);
+
+    virtual     float       masterVolume() const;
+    virtual     bool        masterMute() const;
+
+    virtual     status_t    setStreamVolume(int stream, float value);
+    virtual     status_t    setStreamMute(int stream, bool muted);
+
+    virtual     float       streamVolume(int stream) const;
+    virtual     bool        streamMute(int stream) const;
+
+    virtual     status_t    setRouting(int mode, uint32_t routes, uint32_t mask);
+    virtual     uint32_t    getRouting(int mode) const;
+
+    virtual     status_t    setMode(int mode);
+    virtual     int         getMode() const;
+
+    virtual     status_t    setMicMute(bool state);
+    virtual     bool        getMicMute() const;
+
+    virtual     bool        isMusicActive() const;
+
+    virtual     status_t    setParameter(const char* key, const char* value);
+
+    enum hardware_call_state {
+        AUDIO_HW_IDLE = 0,
+        AUDIO_HW_INIT,
+        AUDIO_HW_OUTPUT_OPEN,
+        AUDIO_HW_OUTPUT_CLOSE,
+        AUDIO_HW_INPUT_OPEN,
+        AUDIO_HW_INPUT_CLOSE,
+        AUDIO_HW_STANDBY,
+        AUDIO_HW_SET_MASTER_VOLUME,
+        AUDIO_HW_GET_ROUTING,
+        AUDIO_HW_SET_ROUTING,
+        AUDIO_HW_GET_MODE,
+        AUDIO_HW_SET_MODE,
+        AUDIO_HW_GET_MIC_MUTE,
+        AUDIO_HW_SET_MIC_MUTE,
+        AUDIO_SET_VOICE_VOLUME,
+        AUDIO_SET_PARAMETER,
+    };
+
+    // record interface
+    virtual sp<IAudioRecord> openRecord(
+                                pid_t pid,
+                                int streamType,
+                                uint32_t sampleRate,
+                                int format,
+                                int channelCount,
+                                int bufferCount,
+                                uint32_t flags);
+
+    virtual     status_t    onTransact(
+                                uint32_t code,
+                                const Parcel& data,
+                                Parcel* reply,
+                                uint32_t flags);
+
+private:
+                            AudioFlinger();
+    virtual                 ~AudioFlinger();
+    
+    // Internal dump utilites.
+    status_t dumpPermissionDenial(int fd, const Vector<String16>& args);
+    status_t dumpClients(int fd, const Vector<String16>& args);
+    status_t dumpTracks(int fd, const Vector<String16>& args);
+    status_t dumpInternals(int fd, const Vector<String16>& args);
+    
+    // --- Client ---
+    class Client : public RefBase {
+    public:
+                            Client(const sp<AudioFlinger>& audioFlinger, pid_t pid);
+        virtual             ~Client();
+        const sp<MemoryDealer>&     heap() const;
+        pid_t               pid() const { return mPid; }
+    private:
+                            Client(const Client&);
+                            Client& operator = (const Client&);
+        sp<AudioFlinger>    mAudioFlinger;
+        sp<MemoryDealer>    mMemoryDealer;
+        pid_t               mPid;
+    };
+
+
+    // --- Track ---
+    class TrackHandle;
+    class RecordHandle;
+    class AudioRecordThread;
+
+    // base for record and playback
+    class TrackBase : public AudioBufferProvider, public RefBase {
+
+    public:
+        enum track_state {
+            IDLE,
+            TERMINATED,
+            STOPPED,
+            RESUMING,
+            ACTIVE,
+            PAUSING,
+            PAUSED
+        };
+
+        enum track_flags {
+            STEPSERVER_FAILED = 0x01   //  StepServer could not acquire cblk->lock mutex 
+        };
+        
+                            TrackBase(  const sp<AudioFlinger>& audioFlinger,
+                                    const sp<Client>& client,
+                                    int streamType,
+                                    uint32_t sampleRate,
+                                    int format,
+                                    int channelCount,
+                                    int bufferCount,
+                                    int bufferSize);
+                            ~TrackBase();
+
+        virtual status_t    start() = 0;
+        virtual void        stop() = 0;
+                sp<IMemory> getCblk() const;
+
+    protected:
+        friend class AudioFlinger;
+        friend class RecordHandle;
+
+                            TrackBase(const TrackBase&);
+                            TrackBase& operator = (const TrackBase&);
+
+        virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer) = 0;
+        virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer);
+
+        audio_track_cblk_t* cblk() const {
+            return mCblk;
+        }
+
+        int type() const {
+            return mStreamType;
+        }
+
+        int format() const {
+            return mFormat;
+        }
+
+        int channelCount() const {
+            return mChannelCount;
+        }
+
+        int bufferCount() const {
+            return mBufferCount;
+        }
+
+        int sampleRate() const;
+
+        void* getBuffer(int n) const {
+            return (char*)mBuffers + n * mBufferSize;
+        }
+
+        int name() const {
+            return mName;
+        }
+
+        bool isStopped() const {
+            return mState == STOPPED;
+        }
+
+        bool isTerminated() const {
+            return mState == TERMINATED;
+        }
+
+        bool step();
+        void reset();
+
+        sp<AudioFlinger>    mAudioFlinger;
+        sp<Client>          mClient;
+        sp<IMemory>         mCblkMemory;
+        audio_track_cblk_t* mCblk;
+        int                 mStreamType;
+        uint8_t             mFormat;
+        uint8_t             mChannelCount;
+        uint8_t             mBufferCount;
+        uint8_t             mFlags;
+        void*               mBuffers;
+        size_t              mBufferSize;
+        int                 mName;
+        // we don't really need a lock for these
+        int                 mState;
+        int                 mClientTid;
+    };
+
+    // playback track
+    class Track : public TrackBase {
+    public:
+                            Track(  const sp<AudioFlinger>& audioFlinger,
+                                    const sp<Client>& client,
+                                    int streamType,
+                                    uint32_t sampleRate,
+                                    int format,
+                                    int channelCount,
+                                    int bufferCount,
+                                    int bufferSize);
+                            ~Track();
+
+                void        dump(char* buffer, size_t size);
+        virtual status_t    start();
+        virtual void        stop();
+                void        pause();
+
+                void        flush();
+                void        destroy();
+                void        mute(bool);
+                void        setVolume(float left, float right);
+
+    private:
+        friend class AudioFlinger;
+        friend class TrackHandle;
+
+                            Track(const Track&);
+                            Track& operator = (const Track&);
+
+        virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
+
+        bool isMuted() const {
+            return mMute;
+        }
+
+        bool isPausing() const {
+            return mState == PAUSING;
+        }
+
+        bool isPaused() const {
+            return mState == PAUSED;
+        }
+
+        bool isReady(uint32_t u, int32_t s) const;
+
+        void setPaused() { mState = PAUSED; }
+        void reset();
+
+        // we don't really need a lock for these
+        float               mVolume[2];
+        volatile bool       mMute;
+        // FILLED state is used for suppressing volume ramp at begin of playing
+        enum {FS_FILLING, FS_FILLED, FS_ACTIVE};
+        mutable uint8_t     mFillingUpStatus;
+        int8_t              mRetryCount;
+    };  // end of Track
+
+    friend class AudioBuffer;
+
+    class TrackHandle : public android::BnAudioTrack {
+    public:
+                            TrackHandle(const sp<Track>& track);
+        virtual             ~TrackHandle();
+        virtual status_t    start();
+        virtual void        stop();
+        virtual void        flush();
+        virtual void        mute(bool);
+        virtual void        pause();
+        virtual void        setVolume(float left, float right);
+        virtual sp<IMemory> getCblk() const;
+        virtual status_t onTransact(
+            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
+    private:
+        sp<Track> mTrack;
+    };
+
+    struct  stream_type_t {
+        stream_type_t()
+            :   volume(1.0f),
+                mute(false)
+        {
+        }
+        float       volume;
+        bool        mute;
+    };
+
+    friend class Client;
+    friend class Track;
+
+
+                void        removeClient(pid_t pid);
+
+                status_t    addTrack(const sp<Track>& track);
+                void        removeTrack(wp<Track> track, int name);
+                void        remove_track_l(wp<Track> track, int name);
+                void        destroyTrack(const sp<Track>& track);
+
+                AudioMixer& audioMixer() {
+                    return *mAudioMixer;
+                }
+
+    // record track
+    class RecordTrack : public TrackBase {
+    public:
+                            RecordTrack(  const sp<AudioFlinger>& audioFlinger,
+                                    const sp<Client>& client,
+                                    int streamType,
+                                    uint32_t sampleRate,
+                                    int format,
+                                    int channelCount,
+                                    int bufferCount,
+                                    int bufferSize);
+                            ~RecordTrack();
+
+        virtual status_t    start();
+        virtual void        stop();
+
+                bool        overflow() { bool tmp = mOverflow; mOverflow = false; return tmp; }
+                bool        setOverflow() { bool tmp = mOverflow; mOverflow = true; return tmp; }
+
+    private:
+        friend class AudioFlinger;
+        friend class RecordHandle;
+        friend class AudioRecordThread;
+
+                            RecordTrack(const Track&);
+                            RecordTrack& operator = (const Track&);
+
+        virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
+
+        bool                mOverflow;
+    };
+
+    class RecordHandle : public android::BnAudioRecord {
+    public:
+        RecordHandle(const sp<RecordTrack>& recordTrack);
+        virtual             ~RecordHandle();
+        virtual status_t    start();
+        virtual void        stop();
+        virtual sp<IMemory> getCblk() const;
+        virtual status_t onTransact(
+            uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
+    private:
+        sp<RecordTrack> mRecordTrack;
+    };
+
+    // record thread
+    class AudioRecordThread : public Thread
+    {
+    public:
+        AudioRecordThread(const sp<AudioFlinger>& audioFlinger);
+        virtual             ~AudioRecordThread();
+        virtual bool        threadLoop();
+        virtual status_t    readyToRun() { return NO_ERROR; }
+        virtual void        onFirstRef() {}
+
+                status_t    open(const sp<RecordTrack>& recordTrack, AudioStreamIn *input);
+                status_t    start();
+                void        stop();
+                status_t    close();
+                void        exit();
+                
+                bool        isOpen() { return bool(mRecordTrack != NULL); }
+
+    private:
+                AudioRecordThread();
+                sp<AudioFlinger>                    mAudioFlinger;
+                wp<RecordTrack>                     mRecordTrack;
+                AudioStreamIn*                      mInput;
+                Mutex                               mLock;
+                Condition                           mWaitWorkCV;
+                AudioBufferProvider::Buffer         mBuffer;
+                volatile bool                       mActive;
+    };
+
+    friend class AudioRecordThread;
+
+                sp<AudioRecordThread> audioRecordThread();
+                void        endRecord();
+                status_t    startRecord();
+                void        stopRecord();
+                void        exitRecord();
+                
+                AudioHardwareInterface* audioHardware() { return mAudioHardware; }
+
+    mutable     Mutex                                       mHardwareLock;
+    mutable     Mutex                                       mLock;
+    mutable     Condition                                   mWaitWorkCV;
+                DefaultKeyedVector< pid_t, wp<Client> >     mClients;
+                SortedVector< wp<Track> >                   mActiveTracks;
+                SortedVector< sp<Track> >                   mTracks;
+                float                               mMasterVolume;
+                uint32_t                            mMasterRouting;
+                bool                                mMasterMute;
+                stream_type_t                       mStreamTypes[AudioTrack::NUM_STREAM_TYPES];
+
+                AudioMixer*                         mAudioMixer;
+                AudioHardwareInterface*             mAudioHardware;
+                AudioStreamOut*                     mOutput;
+                sp<AudioRecordThread>               mAudioRecordThread;
+                uint32_t                            mSampleRate;
+                size_t                              mFrameCount;
+                int                                 mChannelCount;
+                int                                 mFormat;
+                int                                 mMixBufferSize;
+                int16_t*                            mMixBuffer;
+    mutable     int                                 mHardwareStatus;
+                nsecs_t                             mLastWriteTime;
+                int                                 mNumWrites;
+                int                                 mNumDelayedWrites;
+                bool                                mStandby;
+                bool                                mInWrite;
+};
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_AUDIO_FLINGER_H