diff --git a/services/audioflinger/AudioPolicyService.cpp b/services/audioflinger/AudioPolicyService.cpp
new file mode 100644
index 0000000..bb3905c
--- /dev/null
+++ b/services/audioflinger/AudioPolicyService.cpp
@@ -0,0 +1,924 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+#define LOG_TAG "AudioPolicyService"
+//#define LOG_NDEBUG 0
+
+#undef __STRICT_ANSI__
+#define __STDINT_LIMITS
+#define __STDC_LIMIT_MACROS
+#include <stdint.h>
+
+#include <sys/time.h>
+#include <binder/IServiceManager.h>
+#include <utils/Log.h>
+#include <cutils/properties.h>
+#include <binder/IPCThreadState.h>
+#include <utils/String16.h>
+#include <utils/threads.h>
+#include "AudioPolicyService.h"
+#include <hardware_legacy/AudioPolicyManagerBase.h>
+#include <cutils/properties.h>
+#include <dlfcn.h>
+#include <hardware_legacy/power.h>
+
+// ----------------------------------------------------------------------------
+// the sim build doesn't have gettid
+
+#ifndef HAVE_GETTID
+# define gettid getpid
+#endif
+
+namespace android {
+
+
+static const char *kDeadlockedString = "AudioPolicyService may be deadlocked\n";
+static const char *kCmdDeadlockedString = "AudioPolicyService command thread may be deadlocked\n";
+
+static const int kDumpLockRetries = 50;
+static const int kDumpLockSleep = 20000;
+
+static bool checkPermission() {
+#ifndef HAVE_ANDROID_OS
+    return true;
+#endif
+    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
+    bool ok = checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS"));
+    if (!ok) LOGE("Request requires android.permission.MODIFY_AUDIO_SETTINGS");
+    return ok;
+}
+
+// ----------------------------------------------------------------------------
+
+AudioPolicyService::AudioPolicyService()
+    : BnAudioPolicyService() , mpPolicyManager(NULL)
+{
+    char value[PROPERTY_VALUE_MAX];
+
+    // start tone playback thread
+    mTonePlaybackThread = new AudioCommandThread(String8(""));
+    // start audio commands thread
+    mAudioCommandThread = new AudioCommandThread(String8("ApmCommandThread"));
+
+#if (defined GENERIC_AUDIO) || (defined AUDIO_POLICY_TEST)
+    mpPolicyManager = new AudioPolicyManagerBase(this);
+    LOGV("build for GENERIC_AUDIO - using generic audio policy");
+#else
+    // if running in emulation - use the emulator driver
+    if (property_get("ro.kernel.qemu", value, 0)) {
+        LOGV("Running in emulation - using generic audio policy");
+        mpPolicyManager = new AudioPolicyManagerBase(this);
+    }
+    else {
+        LOGV("Using hardware specific audio policy");
+        mpPolicyManager = createAudioPolicyManager(this);
+    }
+#endif
+
+    // load properties
+    property_get("ro.camera.sound.forced", value, "0");
+    mpPolicyManager->setSystemProperty("ro.camera.sound.forced", value);
+}
+
+AudioPolicyService::~AudioPolicyService()
+{
+    mTonePlaybackThread->exit();
+    mTonePlaybackThread.clear();
+    mAudioCommandThread->exit();
+    mAudioCommandThread.clear();
+
+    if (mpPolicyManager) {
+        delete mpPolicyManager;
+    }
+}
+
+
+status_t AudioPolicyService::setDeviceConnectionState(AudioSystem::audio_devices device,
+                                                  AudioSystem::device_connection_state state,
+                                                  const char *device_address)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    if (!checkPermission()) {
+        return PERMISSION_DENIED;
+    }
+    if (!AudioSystem::isOutputDevice(device) && !AudioSystem::isInputDevice(device)) {
+        return BAD_VALUE;
+    }
+    if (state != AudioSystem::DEVICE_STATE_AVAILABLE && state != AudioSystem::DEVICE_STATE_UNAVAILABLE) {
+        return BAD_VALUE;
+    }
+
+    LOGV("setDeviceConnectionState() tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    return mpPolicyManager->setDeviceConnectionState(device, state, device_address);
+}
+
+AudioSystem::device_connection_state AudioPolicyService::getDeviceConnectionState(AudioSystem::audio_devices device,
+                                                  const char *device_address)
+{
+    if (mpPolicyManager == NULL) {
+        return AudioSystem::DEVICE_STATE_UNAVAILABLE;
+    }
+    if (!checkPermission()) {
+        return AudioSystem::DEVICE_STATE_UNAVAILABLE;
+    }
+    return mpPolicyManager->getDeviceConnectionState(device, device_address);
+}
+
+status_t AudioPolicyService::setPhoneState(int state)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    if (!checkPermission()) {
+        return PERMISSION_DENIED;
+    }
+    if (state < 0 || state >= AudioSystem::NUM_MODES) {
+        return BAD_VALUE;
+    }
+
+    LOGV("setPhoneState() tid %d", gettid());
+
+    // TODO: check if it is more appropriate to do it in platform specific policy manager
+    AudioSystem::setMode(state);
+
+    Mutex::Autolock _l(mLock);
+    mpPolicyManager->setPhoneState(state);
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::setRingerMode(uint32_t mode, uint32_t mask)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    if (!checkPermission()) {
+        return PERMISSION_DENIED;
+    }
+
+    mpPolicyManager->setRingerMode(mode, mask);
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    if (!checkPermission()) {
+        return PERMISSION_DENIED;
+    }
+    if (usage < 0 || usage >= AudioSystem::NUM_FORCE_USE) {
+        return BAD_VALUE;
+    }
+    if (config < 0 || config >= AudioSystem::NUM_FORCE_CONFIG) {
+        return BAD_VALUE;
+    }
+    LOGV("setForceUse() tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    mpPolicyManager->setForceUse(usage, config);
+    return NO_ERROR;
+}
+
+AudioSystem::forced_config AudioPolicyService::getForceUse(AudioSystem::force_use usage)
+{
+    if (mpPolicyManager == NULL) {
+        return AudioSystem::FORCE_NONE;
+    }
+    if (!checkPermission()) {
+        return AudioSystem::FORCE_NONE;
+    }
+    if (usage < 0 || usage >= AudioSystem::NUM_FORCE_USE) {
+        return AudioSystem::FORCE_NONE;
+    }
+    return mpPolicyManager->getForceUse(usage);
+}
+
+audio_io_handle_t AudioPolicyService::getOutput(AudioSystem::stream_type stream,
+                                    uint32_t samplingRate,
+                                    uint32_t format,
+                                    uint32_t channels,
+                                    AudioSystem::output_flags flags)
+{
+    if (mpPolicyManager == NULL) {
+        return 0;
+    }
+    LOGV("getOutput() tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    return mpPolicyManager->getOutput(stream, samplingRate, format, channels, flags);
+}
+
+status_t AudioPolicyService::startOutput(audio_io_handle_t output, AudioSystem::stream_type stream)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    LOGV("startOutput() tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    return mpPolicyManager->startOutput(output, stream);
+}
+
+status_t AudioPolicyService::stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    LOGV("stopOutput() tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    return mpPolicyManager->stopOutput(output, stream);
+}
+
+void AudioPolicyService::releaseOutput(audio_io_handle_t output)
+{
+    if (mpPolicyManager == NULL) {
+        return;
+    }
+    LOGV("releaseOutput() tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    mpPolicyManager->releaseOutput(output);
+}
+
+audio_io_handle_t AudioPolicyService::getInput(int inputSource,
+                                    uint32_t samplingRate,
+                                    uint32_t format,
+                                    uint32_t channels,
+                                    AudioSystem::audio_in_acoustics acoustics)
+{
+    if (mpPolicyManager == NULL) {
+        return 0;
+    }
+    Mutex::Autolock _l(mLock);
+    return mpPolicyManager->getInput(inputSource, samplingRate, format, channels, acoustics);
+}
+
+status_t AudioPolicyService::startInput(audio_io_handle_t input)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    Mutex::Autolock _l(mLock);
+    return mpPolicyManager->startInput(input);
+}
+
+status_t AudioPolicyService::stopInput(audio_io_handle_t input)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    Mutex::Autolock _l(mLock);
+    return mpPolicyManager->stopInput(input);
+}
+
+void AudioPolicyService::releaseInput(audio_io_handle_t input)
+{
+    if (mpPolicyManager == NULL) {
+        return;
+    }
+    Mutex::Autolock _l(mLock);
+    mpPolicyManager->releaseInput(input);
+}
+
+status_t AudioPolicyService::initStreamVolume(AudioSystem::stream_type stream,
+                                            int indexMin,
+                                            int indexMax)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    if (!checkPermission()) {
+        return PERMISSION_DENIED;
+    }
+    if (stream < 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
+        return BAD_VALUE;
+    }
+    mpPolicyManager->initStreamVolume(stream, indexMin, indexMax);
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::setStreamVolumeIndex(AudioSystem::stream_type stream, int index)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    if (!checkPermission()) {
+        return PERMISSION_DENIED;
+    }
+    if (stream < 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
+        return BAD_VALUE;
+    }
+
+    return mpPolicyManager->setStreamVolumeIndex(stream, index);
+}
+
+status_t AudioPolicyService::getStreamVolumeIndex(AudioSystem::stream_type stream, int *index)
+{
+    if (mpPolicyManager == NULL) {
+        return NO_INIT;
+    }
+    if (!checkPermission()) {
+        return PERMISSION_DENIED;
+    }
+    if (stream < 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
+        return BAD_VALUE;
+    }
+    return mpPolicyManager->getStreamVolumeIndex(stream, index);
+}
+
+void AudioPolicyService::binderDied(const wp<IBinder>& who) {
+    LOGW("binderDied() %p, tid %d, calling tid %d", who.unsafe_get(), gettid(), IPCThreadState::self()->getCallingPid());
+}
+
+static bool tryLock(Mutex& mutex)
+{
+    bool locked = false;
+    for (int i = 0; i < kDumpLockRetries; ++i) {
+        if (mutex.tryLock() == NO_ERROR) {
+            locked = true;
+            break;
+        }
+        usleep(kDumpLockSleep);
+    }
+    return locked;
+}
+
+status_t AudioPolicyService::dumpInternals(int fd)
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+
+    snprintf(buffer, SIZE, "PolicyManager Interface: %p\n", mpPolicyManager);
+    result.append(buffer);
+    snprintf(buffer, SIZE, "Command Thread: %p\n", mAudioCommandThread.get());
+    result.append(buffer);
+    snprintf(buffer, SIZE, "Tones Thread: %p\n", mTonePlaybackThread.get());
+    result.append(buffer);
+
+    write(fd, result.string(), result.size());
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::dump(int fd, const Vector<String16>& args)
+{
+    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
+        dumpPermissionDenial(fd);
+    } else {
+        bool locked = tryLock(mLock);
+        if (!locked) {
+            String8 result(kDeadlockedString);
+            write(fd, result.string(), result.size());
+        }
+
+        dumpInternals(fd);
+        if (mAudioCommandThread != NULL) {
+            mAudioCommandThread->dump(fd);
+        }
+        if (mTonePlaybackThread != NULL) {
+            mTonePlaybackThread->dump(fd);
+        }
+
+        if (mpPolicyManager) {
+            mpPolicyManager->dump(fd);
+        }
+
+        if (locked) mLock.unlock();
+    }
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::dumpPermissionDenial(int fd)
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+    snprintf(buffer, SIZE, "Permission Denial: "
+            "can't dump AudioPolicyService from pid=%d, uid=%d\n",
+            IPCThreadState::self()->getCallingPid(),
+            IPCThreadState::self()->getCallingUid());
+    result.append(buffer);
+    write(fd, result.string(), result.size());
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::onTransact(
+        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    return BnAudioPolicyService::onTransact(code, data, reply, flags);
+}
+
+
+// ----------------------------------------------------------------------------
+void AudioPolicyService::instantiate() {
+    defaultServiceManager()->addService(
+            String16("media.audio_policy"), new AudioPolicyService());
+}
+
+
+// ----------------------------------------------------------------------------
+// AudioPolicyClientInterface implementation
+// ----------------------------------------------------------------------------
+
+
+audio_io_handle_t AudioPolicyService::openOutput(uint32_t *pDevices,
+                                uint32_t *pSamplingRate,
+                                uint32_t *pFormat,
+                                uint32_t *pChannels,
+                                uint32_t *pLatencyMs,
+                                AudioSystem::output_flags flags)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        LOGW("openOutput() could not get AudioFlinger");
+        return 0;
+    }
+
+    return af->openOutput(pDevices, pSamplingRate, (uint32_t *)pFormat, pChannels, pLatencyMs, flags);
+}
+
+audio_io_handle_t AudioPolicyService::openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        LOGW("openDuplicateOutput() could not get AudioFlinger");
+        return 0;
+    }
+    return af->openDuplicateOutput(output1, output2);
+}
+
+status_t AudioPolicyService::closeOutput(audio_io_handle_t output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) return PERMISSION_DENIED;
+
+    return af->closeOutput(output);
+}
+
+
+status_t AudioPolicyService::suspendOutput(audio_io_handle_t output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        LOGW("suspendOutput() could not get AudioFlinger");
+        return PERMISSION_DENIED;
+    }
+
+    return af->suspendOutput(output);
+}
+
+status_t AudioPolicyService::restoreOutput(audio_io_handle_t output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        LOGW("restoreOutput() could not get AudioFlinger");
+        return PERMISSION_DENIED;
+    }
+
+    return af->restoreOutput(output);
+}
+
+audio_io_handle_t AudioPolicyService::openInput(uint32_t *pDevices,
+                                uint32_t *pSamplingRate,
+                                uint32_t *pFormat,
+                                uint32_t *pChannels,
+                                uint32_t acoustics)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        LOGW("openInput() could not get AudioFlinger");
+        return 0;
+    }
+
+    return af->openInput(pDevices, pSamplingRate, (uint32_t *)pFormat, pChannels, acoustics);
+}
+
+status_t AudioPolicyService::closeInput(audio_io_handle_t input)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) return PERMISSION_DENIED;
+
+    return af->closeInput(input);
+}
+
+status_t AudioPolicyService::setStreamVolume(AudioSystem::stream_type stream, float volume, audio_io_handle_t output, int delayMs)
+{
+    return mAudioCommandThread->volumeCommand((int)stream, volume, (int)output, delayMs);
+}
+
+status_t AudioPolicyService::setStreamOutput(AudioSystem::stream_type stream, audio_io_handle_t output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) return PERMISSION_DENIED;
+
+    return af->setStreamOutput(stream, output);
+}
+
+
+void AudioPolicyService::setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs, int delayMs)
+{
+    mAudioCommandThread->parametersCommand((int)ioHandle, keyValuePairs, delayMs);
+}
+
+String8 AudioPolicyService::getParameters(audio_io_handle_t ioHandle, const String8& keys)
+{
+    String8 result = AudioSystem::getParameters(ioHandle, keys);
+    return result;
+}
+
+status_t AudioPolicyService::startTone(ToneGenerator::tone_type tone, AudioSystem::stream_type stream)
+{
+    mTonePlaybackThread->startToneCommand(tone, stream);
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::stopTone()
+{
+    mTonePlaybackThread->stopToneCommand();
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::setVoiceVolume(float volume, int delayMs)
+{
+    return mAudioCommandThread->voiceVolumeCommand(volume, delayMs);
+}
+
+// -----------  AudioPolicyService::AudioCommandThread implementation ----------
+
+AudioPolicyService::AudioCommandThread::AudioCommandThread(String8 name)
+    : Thread(false), mName(name)
+{
+    mpToneGenerator = NULL;
+}
+
+
+AudioPolicyService::AudioCommandThread::~AudioCommandThread()
+{
+    if (mName != "" && !mAudioCommands.isEmpty()) {
+        release_wake_lock(mName.string());
+    }
+    mAudioCommands.clear();
+    if (mpToneGenerator != NULL) delete mpToneGenerator;
+}
+
+void AudioPolicyService::AudioCommandThread::onFirstRef()
+{
+    if (mName != "") {
+        run(mName.string(), ANDROID_PRIORITY_AUDIO);
+    } else {
+        run("AudioCommandThread", ANDROID_PRIORITY_AUDIO);
+    }
+}
+
+bool AudioPolicyService::AudioCommandThread::threadLoop()
+{
+    nsecs_t waitTime = INT64_MAX;
+
+    mLock.lock();
+    while (!exitPending())
+    {
+        while(!mAudioCommands.isEmpty()) {
+            nsecs_t curTime = systemTime();
+            // commands are sorted by increasing time stamp: execute them from index 0 and up
+            if (mAudioCommands[0]->mTime <= curTime) {
+                AudioCommand *command = mAudioCommands[0];
+                mAudioCommands.removeAt(0);
+                mLastCommand = *command;
+
+                switch (command->mCommand) {
+                case START_TONE: {
+                    mLock.unlock();
+                    ToneData *data = (ToneData *)command->mParam;
+                    LOGV("AudioCommandThread() processing start tone %d on stream %d",
+                            data->mType, data->mStream);
+                    if (mpToneGenerator != NULL)
+                        delete mpToneGenerator;
+                    mpToneGenerator = new ToneGenerator(data->mStream, 1.0);
+                    mpToneGenerator->startTone(data->mType);
+                    delete data;
+                    mLock.lock();
+                    }break;
+                case STOP_TONE: {
+                    mLock.unlock();
+                    LOGV("AudioCommandThread() processing stop tone");
+                    if (mpToneGenerator != NULL) {
+                        mpToneGenerator->stopTone();
+                        delete mpToneGenerator;
+                        mpToneGenerator = NULL;
+                    }
+                    mLock.lock();
+                    }break;
+                case SET_VOLUME: {
+                    VolumeData *data = (VolumeData *)command->mParam;
+                    LOGV("AudioCommandThread() processing set volume stream %d, volume %f, output %d", data->mStream, data->mVolume, data->mIO);
+                    command->mStatus = AudioSystem::setStreamVolume(data->mStream, data->mVolume, data->mIO);
+                    if (command->mWaitStatus) {
+                        command->mCond.signal();
+                        mWaitWorkCV.wait(mLock);
+                    }
+                    delete data;
+                    }break;
+                case SET_PARAMETERS: {
+                     ParametersData *data = (ParametersData *)command->mParam;
+                     LOGV("AudioCommandThread() processing set parameters string %s, io %d", data->mKeyValuePairs.string(), data->mIO);
+                     command->mStatus = AudioSystem::setParameters(data->mIO, data->mKeyValuePairs);
+                     if (command->mWaitStatus) {
+                         command->mCond.signal();
+                         mWaitWorkCV.wait(mLock);
+                     }
+                     delete data;
+                     }break;
+                case SET_VOICE_VOLUME: {
+                    VoiceVolumeData *data = (VoiceVolumeData *)command->mParam;
+                    LOGV("AudioCommandThread() processing set voice volume volume %f", data->mVolume);
+                    command->mStatus = AudioSystem::setVoiceVolume(data->mVolume);
+                    if (command->mWaitStatus) {
+                        command->mCond.signal();
+                        mWaitWorkCV.wait(mLock);
+                    }
+                    delete data;
+                    }break;
+                default:
+                    LOGW("AudioCommandThread() unknown command %d", command->mCommand);
+                }
+                delete command;
+                waitTime = INT64_MAX;
+            } else {
+                waitTime = mAudioCommands[0]->mTime - curTime;
+                break;
+            }
+        }
+        // release delayed commands wake lock
+        if (mName != "" && mAudioCommands.isEmpty()) {
+            release_wake_lock(mName.string());
+        }
+        LOGV("AudioCommandThread() going to sleep");
+        mWaitWorkCV.waitRelative(mLock, waitTime);
+        LOGV("AudioCommandThread() waking up");
+    }
+    mLock.unlock();
+    return false;
+}
+
+status_t AudioPolicyService::AudioCommandThread::dump(int fd)
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+
+    snprintf(buffer, SIZE, "AudioCommandThread %p Dump\n", this);
+    result.append(buffer);
+    write(fd, result.string(), result.size());
+
+    bool locked = tryLock(mLock);
+    if (!locked) {
+        String8 result2(kCmdDeadlockedString);
+        write(fd, result2.string(), result2.size());
+    }
+
+    snprintf(buffer, SIZE, "- Commands:\n");
+    result = String8(buffer);
+    result.append("   Command Time        Wait pParam\n");
+    for (int i = 0; i < (int)mAudioCommands.size(); i++) {
+        mAudioCommands[i]->dump(buffer, SIZE);
+        result.append(buffer);
+    }
+    result.append("  Last Command\n");
+    mLastCommand.dump(buffer, SIZE);
+    result.append(buffer);
+
+    write(fd, result.string(), result.size());
+
+    if (locked) mLock.unlock();
+
+    return NO_ERROR;
+}
+
+void AudioPolicyService::AudioCommandThread::startToneCommand(int type, int stream)
+{
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = START_TONE;
+    ToneData *data = new ToneData();
+    data->mType = type;
+    data->mStream = stream;
+    command->mParam = (void *)data;
+    command->mWaitStatus = false;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command);
+    LOGV("AudioCommandThread() adding tone start type %d, stream %d", type, stream);
+    mWaitWorkCV.signal();
+}
+
+void AudioPolicyService::AudioCommandThread::stopToneCommand()
+{
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = STOP_TONE;
+    command->mParam = NULL;
+    command->mWaitStatus = false;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command);
+    LOGV("AudioCommandThread() adding tone stop");
+    mWaitWorkCV.signal();
+}
+
+status_t AudioPolicyService::AudioCommandThread::volumeCommand(int stream, float volume, int output, int delayMs)
+{
+    status_t status = NO_ERROR;
+
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = SET_VOLUME;
+    VolumeData *data = new VolumeData();
+    data->mStream = stream;
+    data->mVolume = volume;
+    data->mIO = output;
+    command->mParam = data;
+    if (delayMs == 0) {
+        command->mWaitStatus = true;
+    } else {
+        command->mWaitStatus = false;
+    }
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command, delayMs);
+    LOGV("AudioCommandThread() adding set volume stream %d, volume %f, output %d", stream, volume, output);
+    mWaitWorkCV.signal();
+    if (command->mWaitStatus) {
+        command->mCond.wait(mLock);
+        status =  command->mStatus;
+        mWaitWorkCV.signal();
+    }
+    return status;
+}
+
+status_t AudioPolicyService::AudioCommandThread::parametersCommand(int ioHandle, const String8& keyValuePairs, int delayMs)
+{
+    status_t status = NO_ERROR;
+
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = SET_PARAMETERS;
+    ParametersData *data = new ParametersData();
+    data->mIO = ioHandle;
+    data->mKeyValuePairs = keyValuePairs;
+    command->mParam = data;
+    if (delayMs == 0) {
+        command->mWaitStatus = true;
+    } else {
+        command->mWaitStatus = false;
+    }
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command, delayMs);
+    LOGV("AudioCommandThread() adding set parameter string %s, io %d ,delay %d", keyValuePairs.string(), ioHandle, delayMs);
+    mWaitWorkCV.signal();
+    if (command->mWaitStatus) {
+        command->mCond.wait(mLock);
+        status =  command->mStatus;
+        mWaitWorkCV.signal();
+    }
+    return status;
+}
+
+status_t AudioPolicyService::AudioCommandThread::voiceVolumeCommand(float volume, int delayMs)
+{
+    status_t status = NO_ERROR;
+
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = SET_VOICE_VOLUME;
+    VoiceVolumeData *data = new VoiceVolumeData();
+    data->mVolume = volume;
+    command->mParam = data;
+    if (delayMs == 0) {
+        command->mWaitStatus = true;
+    } else {
+        command->mWaitStatus = false;
+    }
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command, delayMs);
+    LOGV("AudioCommandThread() adding set voice volume volume %f", volume);
+    mWaitWorkCV.signal();
+    if (command->mWaitStatus) {
+        command->mCond.wait(mLock);
+        status =  command->mStatus;
+        mWaitWorkCV.signal();
+    }
+    return status;
+}
+
+// insertCommand_l() must be called with mLock held
+void AudioPolicyService::AudioCommandThread::insertCommand_l(AudioCommand *command, int delayMs)
+{
+    ssize_t i;
+    Vector <AudioCommand *> removedCommands;
+
+    command->mTime = systemTime() + milliseconds(delayMs);
+
+    // acquire wake lock to make sure delayed commands are processed
+    if (mName != "" && mAudioCommands.isEmpty()) {
+        acquire_wake_lock(PARTIAL_WAKE_LOCK, mName.string());
+    }
+
+    // check same pending commands with later time stamps and eliminate them
+    for (i = mAudioCommands.size()-1; i >= 0; i--) {
+        AudioCommand *command2 = mAudioCommands[i];
+        // commands are sorted by increasing time stamp: no need to scan the rest of mAudioCommands
+        if (command2->mTime <= command->mTime) break;
+        if (command2->mCommand != command->mCommand) continue;
+
+        switch (command->mCommand) {
+        case SET_PARAMETERS: {
+            ParametersData *data = (ParametersData *)command->mParam;
+            ParametersData *data2 = (ParametersData *)command2->mParam;
+            if (data->mIO != data2->mIO) break;
+            LOGV("Comparing parameter command %s to new command %s", data2->mKeyValuePairs.string(), data->mKeyValuePairs.string());
+            AudioParameter param = AudioParameter(data->mKeyValuePairs);
+            AudioParameter param2 = AudioParameter(data2->mKeyValuePairs);
+            for (size_t j = 0; j < param.size(); j++) {
+               String8 key;
+               String8 value;
+               param.getAt(j, key, value);
+               for (size_t k = 0; k < param2.size(); k++) {
+                  String8 key2;
+                  String8 value2;
+                  param2.getAt(k, key2, value2);
+                  if (key2 == key) {
+                      param2.remove(key2);
+                      LOGV("Filtering out parameter %s", key2.string());
+                      break;
+                  }
+               }
+            }
+            // if all keys have been filtered out, remove the command.
+            // otherwise, update the key value pairs
+            if (param2.size() == 0) {
+                removedCommands.add(command2);
+            } else {
+                data2->mKeyValuePairs = param2.toString();
+            }
+        } break;
+
+        case SET_VOLUME: {
+            VolumeData *data = (VolumeData *)command->mParam;
+            VolumeData *data2 = (VolumeData *)command2->mParam;
+            if (data->mIO != data2->mIO) break;
+            if (data->mStream != data2->mStream) break;
+            LOGV("Filtering out volume command on output %d for stream %d", data->mIO, data->mStream);
+            removedCommands.add(command2);
+        } break;
+        case START_TONE:
+        case STOP_TONE:
+        default:
+            break;
+        }
+    }
+
+    // remove filtered commands
+    for (size_t j = 0; j < removedCommands.size(); j++) {
+        // removed commands always have time stamps greater than current command
+        for (size_t k = i + 1; k < mAudioCommands.size(); k++) {
+            if (mAudioCommands[k] == removedCommands[j]) {
+                LOGV("suppressing command: %d", mAudioCommands[k]->mCommand);
+                mAudioCommands.removeAt(k);
+                break;
+            }
+        }
+    }
+    removedCommands.clear();
+
+    // insert command at the right place according to its time stamp
+    LOGV("inserting command: %d at index %d, num commands %d", command->mCommand, (int)i+1, mAudioCommands.size());
+    mAudioCommands.insertAt(command, i + 1);
+}
+
+void AudioPolicyService::AudioCommandThread::exit()
+{
+    LOGV("AudioCommandThread::exit");
+    {
+        AutoMutex _l(mLock);
+        requestExit();
+        mWaitWorkCV.signal();
+    }
+    requestExitAndWait();
+}
+
+void AudioPolicyService::AudioCommandThread::AudioCommand::dump(char* buffer, size_t size)
+{
+    snprintf(buffer, size, "   %02d      %06d.%03d  %01u    %p\n",
+            mCommand,
+            (int)ns2s(mTime),
+            (int)ns2ms(mTime)%1000,
+            mWaitStatus,
+            mParam);
+}
+
+}; // namespace android