move audio policy service to a separate library

Change-Id: Ibc3ef07aa9860b7fd4f9aaff27b0dbe0dcbf1cbf

3 files changed, 2078 insertions, 0 deletions

diff --git a/services/audiopolicy/Android.mk b/services/audiopolicy/Android.mk
new file mode 100644
index 0000000..7d9e014
--- /dev/null
+++ b/services/audiopolicy/Android.mk
@@ -0,0 +1,30 @@
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:=               \
+    AudioPolicyService.cpp
+
+LOCAL_C_INCLUDES := \
+    $(TOPDIR)frameworks/av/services/audioflinger \
+    $(call include-path-for, audio-effects) \
+    $(call include-path-for, audio-utils)
+
+LOCAL_SHARED_LIBRARIES := \
+    libcutils \
+    libutils \
+    liblog \
+    libbinder \
+    libmedia \
+    libhardware \
+    libhardware_legacy
+
+LOCAL_STATIC_LIBRARIES := \
+    libmedia_helper \
+    libserviceutility
+
+LOCAL_MODULE:= libaudiopolicy
+
+LOCAL_CFLAGS += -fvisibility=hidden
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/services/audiopolicy/AudioPolicyService.cpp b/services/audiopolicy/AudioPolicyService.cpp
new file mode 100644
index 0000000..41bd990
--- /dev/null
+++ b/services/audiopolicy/AudioPolicyService.cpp
@@ -0,0 +1,1695 @@
+/*
+ * 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
+
+#include "Configuration.h"
+#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 "ServiceUtilities.h"
+#include <hardware_legacy/power.h>
+#include <media/AudioEffect.h>
+#include <media/EffectsFactoryApi.h>
+
+#include <hardware/hardware.h>
+#include <system/audio.h>
+#include <system/audio_policy.h>
+#include <hardware/audio_policy.h>
+#include <audio_effects/audio_effects_conf.h>
+#include <media/AudioParameter.h>
+
+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 kDumpLockSleepUs = 20000;
+
+static const nsecs_t kAudioCommandTimeout = 3000000000LL; // 3 seconds
+
+namespace {
+    extern struct audio_policy_service_ops aps_ops;
+};
+
+// ----------------------------------------------------------------------------
+
+AudioPolicyService::AudioPolicyService()
+    : BnAudioPolicyService(), mpAudioPolicyDev(NULL), mpAudioPolicy(NULL)
+{
+    char value[PROPERTY_VALUE_MAX];
+    const struct hw_module_t *module;
+    int forced_val;
+    int rc;
+
+    Mutex::Autolock _l(mLock);
+
+    // start tone playback thread
+    mTonePlaybackThread = new AudioCommandThread(String8("ApmTone"), this);
+    // start audio commands thread
+    mAudioCommandThread = new AudioCommandThread(String8("ApmAudio"), this);
+    // start output activity command thread
+    mOutputCommandThread = new AudioCommandThread(String8("ApmOutput"), this);
+    /* instantiate the audio policy manager */
+    rc = hw_get_module(AUDIO_POLICY_HARDWARE_MODULE_ID, &module);
+    if (rc) {
+        return;
+    }
+
+    rc = audio_policy_dev_open(module, &mpAudioPolicyDev);
+    ALOGE_IF(rc, "couldn't open audio policy device (%s)", strerror(-rc));
+    if (rc) {
+        return;
+    }
+
+    rc = mpAudioPolicyDev->create_audio_policy(mpAudioPolicyDev, &aps_ops, this,
+                                               &mpAudioPolicy);
+    ALOGE_IF(rc, "couldn't create audio policy (%s)", strerror(-rc));
+    if (rc) {
+        return;
+    }
+
+    rc = mpAudioPolicy->init_check(mpAudioPolicy);
+    ALOGE_IF(rc, "couldn't init_check the audio policy (%s)", strerror(-rc));
+    if (rc) {
+        return;
+    }
+
+    ALOGI("Loaded audio policy from %s (%s)", module->name, module->id);
+
+    // load audio pre processing modules
+    if (access(AUDIO_EFFECT_VENDOR_CONFIG_FILE, R_OK) == 0) {
+        loadPreProcessorConfig(AUDIO_EFFECT_VENDOR_CONFIG_FILE);
+    } else if (access(AUDIO_EFFECT_DEFAULT_CONFIG_FILE, R_OK) == 0) {
+        loadPreProcessorConfig(AUDIO_EFFECT_DEFAULT_CONFIG_FILE);
+    }
+}
+
+AudioPolicyService::~AudioPolicyService()
+{
+    mTonePlaybackThread->exit();
+    mTonePlaybackThread.clear();
+    mAudioCommandThread->exit();
+    mAudioCommandThread.clear();
+
+
+    // release audio pre processing resources
+    for (size_t i = 0; i < mInputSources.size(); i++) {
+        delete mInputSources.valueAt(i);
+    }
+    mInputSources.clear();
+
+    for (size_t i = 0; i < mInputs.size(); i++) {
+        mInputs.valueAt(i)->mEffects.clear();
+        delete mInputs.valueAt(i);
+    }
+    mInputs.clear();
+
+    if (mpAudioPolicy != NULL && mpAudioPolicyDev != NULL) {
+        mpAudioPolicyDev->destroy_audio_policy(mpAudioPolicyDev, mpAudioPolicy);
+    }
+    if (mpAudioPolicyDev != NULL) {
+        audio_policy_dev_close(mpAudioPolicyDev);
+    }
+}
+
+status_t AudioPolicyService::setDeviceConnectionState(audio_devices_t device,
+                                                  audio_policy_dev_state_t state,
+                                                  const char *device_address)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    if (!settingsAllowed()) {
+        return PERMISSION_DENIED;
+    }
+    if (!audio_is_output_device(device) && !audio_is_input_device(device)) {
+        return BAD_VALUE;
+    }
+    if (state != AUDIO_POLICY_DEVICE_STATE_AVAILABLE &&
+            state != AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) {
+        return BAD_VALUE;
+    }
+
+    ALOGV("setDeviceConnectionState()");
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->set_device_connection_state(mpAudioPolicy, device,
+                                                      state, device_address);
+}
+
+audio_policy_dev_state_t AudioPolicyService::getDeviceConnectionState(
+                                                              audio_devices_t device,
+                                                              const char *device_address)
+{
+    if (mpAudioPolicy == NULL) {
+        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
+    }
+    return mpAudioPolicy->get_device_connection_state(mpAudioPolicy, device,
+                                                      device_address);
+}
+
+status_t AudioPolicyService::setPhoneState(audio_mode_t state)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    if (!settingsAllowed()) {
+        return PERMISSION_DENIED;
+    }
+    if (uint32_t(state) >= AUDIO_MODE_CNT) {
+        return BAD_VALUE;
+    }
+
+    ALOGV("setPhoneState()");
+
+    // TODO: check if it is more appropriate to do it in platform specific policy manager
+    AudioSystem::setMode(state);
+
+    Mutex::Autolock _l(mLock);
+    mpAudioPolicy->set_phone_state(mpAudioPolicy, state);
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::setForceUse(audio_policy_force_use_t usage,
+                                         audio_policy_forced_cfg_t config)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    if (!settingsAllowed()) {
+        return PERMISSION_DENIED;
+    }
+    if (usage < 0 || usage >= AUDIO_POLICY_FORCE_USE_CNT) {
+        return BAD_VALUE;
+    }
+    if (config < 0 || config >= AUDIO_POLICY_FORCE_CFG_CNT) {
+        return BAD_VALUE;
+    }
+    ALOGV("setForceUse()");
+    Mutex::Autolock _l(mLock);
+    mpAudioPolicy->set_force_use(mpAudioPolicy, usage, config);
+    return NO_ERROR;
+}
+
+audio_policy_forced_cfg_t AudioPolicyService::getForceUse(audio_policy_force_use_t usage)
+{
+    if (mpAudioPolicy == NULL) {
+        return AUDIO_POLICY_FORCE_NONE;
+    }
+    if (usage < 0 || usage >= AUDIO_POLICY_FORCE_USE_CNT) {
+        return AUDIO_POLICY_FORCE_NONE;
+    }
+    return mpAudioPolicy->get_force_use(mpAudioPolicy, usage);
+}
+
+audio_io_handle_t AudioPolicyService::getOutput(audio_stream_type_t stream,
+                                    uint32_t samplingRate,
+                                    audio_format_t format,
+                                    audio_channel_mask_t channelMask,
+                                    audio_output_flags_t flags,
+                                    const audio_offload_info_t *offloadInfo)
+{
+    if (mpAudioPolicy == NULL) {
+        return 0;
+    }
+    ALOGV("getOutput()");
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->get_output(mpAudioPolicy, stream, samplingRate,
+                                    format, channelMask, flags, offloadInfo);
+}
+
+status_t AudioPolicyService::startOutput(audio_io_handle_t output,
+                                         audio_stream_type_t stream,
+                                         int session)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    ALOGV("startOutput()");
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->start_output(mpAudioPolicy, output, stream, session);
+}
+
+status_t AudioPolicyService::stopOutput(audio_io_handle_t output,
+                                        audio_stream_type_t stream,
+                                        int session)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    ALOGV("stopOutput()");
+    mOutputCommandThread->stopOutputCommand(output, stream, session);
+    return NO_ERROR;
+}
+
+status_t  AudioPolicyService::doStopOutput(audio_io_handle_t output,
+                                      audio_stream_type_t stream,
+                                      int session)
+{
+    ALOGV("doStopOutput from tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->stop_output(mpAudioPolicy, output, stream, session);
+}
+
+void AudioPolicyService::releaseOutput(audio_io_handle_t output)
+{
+    if (mpAudioPolicy == NULL) {
+        return;
+    }
+    ALOGV("releaseOutput()");
+    mOutputCommandThread->releaseOutputCommand(output);
+}
+
+void AudioPolicyService::doReleaseOutput(audio_io_handle_t output)
+{
+    ALOGV("doReleaseOutput from tid %d", gettid());
+    Mutex::Autolock _l(mLock);
+    mpAudioPolicy->release_output(mpAudioPolicy, output);
+}
+
+audio_io_handle_t AudioPolicyService::getInput(audio_source_t inputSource,
+                                    uint32_t samplingRate,
+                                    audio_format_t format,
+                                    audio_channel_mask_t channelMask,
+                                    int audioSession)
+{
+    if (mpAudioPolicy == NULL) {
+        return 0;
+    }
+    // already checked by client, but double-check in case the client wrapper is bypassed
+    if (inputSource >= AUDIO_SOURCE_CNT && inputSource != AUDIO_SOURCE_HOTWORD) {
+        return 0;
+    }
+
+    if ((inputSource == AUDIO_SOURCE_HOTWORD) && !captureHotwordAllowed()) {
+        return 0;
+    }
+
+    Mutex::Autolock _l(mLock);
+    // the audio_in_acoustics_t parameter is ignored by get_input()
+    audio_io_handle_t input = mpAudioPolicy->get_input(mpAudioPolicy, inputSource, samplingRate,
+                                                   format, channelMask, (audio_in_acoustics_t) 0);
+
+    if (input == 0) {
+        return input;
+    }
+    // create audio pre processors according to input source
+    audio_source_t aliasSource = (inputSource == AUDIO_SOURCE_HOTWORD) ?
+                                    AUDIO_SOURCE_VOICE_RECOGNITION : inputSource;
+
+    ssize_t index = mInputSources.indexOfKey(aliasSource);
+    if (index < 0) {
+        return input;
+    }
+    ssize_t idx = mInputs.indexOfKey(input);
+    InputDesc *inputDesc;
+    if (idx < 0) {
+        inputDesc = new InputDesc(audioSession);
+        mInputs.add(input, inputDesc);
+    } else {
+        inputDesc = mInputs.valueAt(idx);
+    }
+
+    Vector <EffectDesc *> effects = mInputSources.valueAt(index)->mEffects;
+    for (size_t i = 0; i < effects.size(); i++) {
+        EffectDesc *effect = effects[i];
+        sp<AudioEffect> fx = new AudioEffect(NULL, &effect->mUuid, -1, 0, 0, audioSession, input);
+        status_t status = fx->initCheck();
+        if (status != NO_ERROR && status != ALREADY_EXISTS) {
+            ALOGW("Failed to create Fx %s on input %d", effect->mName, input);
+            // fx goes out of scope and strong ref on AudioEffect is released
+            continue;
+        }
+        for (size_t j = 0; j < effect->mParams.size(); j++) {
+            fx->setParameter(effect->mParams[j]);
+        }
+        inputDesc->mEffects.add(fx);
+    }
+    setPreProcessorEnabled(inputDesc, true);
+    return input;
+}
+
+status_t AudioPolicyService::startInput(audio_io_handle_t input)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    Mutex::Autolock _l(mLock);
+
+    return mpAudioPolicy->start_input(mpAudioPolicy, input);
+}
+
+status_t AudioPolicyService::stopInput(audio_io_handle_t input)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    Mutex::Autolock _l(mLock);
+
+    return mpAudioPolicy->stop_input(mpAudioPolicy, input);
+}
+
+void AudioPolicyService::releaseInput(audio_io_handle_t input)
+{
+    if (mpAudioPolicy == NULL) {
+        return;
+    }
+    Mutex::Autolock _l(mLock);
+    mpAudioPolicy->release_input(mpAudioPolicy, input);
+
+    ssize_t index = mInputs.indexOfKey(input);
+    if (index < 0) {
+        return;
+    }
+    InputDesc *inputDesc = mInputs.valueAt(index);
+    setPreProcessorEnabled(inputDesc, false);
+    delete inputDesc;
+    mInputs.removeItemsAt(index);
+}
+
+status_t AudioPolicyService::initStreamVolume(audio_stream_type_t stream,
+                                            int indexMin,
+                                            int indexMax)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    if (!settingsAllowed()) {
+        return PERMISSION_DENIED;
+    }
+    if (uint32_t(stream) >= AUDIO_STREAM_CNT) {
+        return BAD_VALUE;
+    }
+    Mutex::Autolock _l(mLock);
+    mpAudioPolicy->init_stream_volume(mpAudioPolicy, stream, indexMin, indexMax);
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::setStreamVolumeIndex(audio_stream_type_t stream,
+                                                  int index,
+                                                  audio_devices_t device)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    if (!settingsAllowed()) {
+        return PERMISSION_DENIED;
+    }
+    if (uint32_t(stream) >= AUDIO_STREAM_CNT) {
+        return BAD_VALUE;
+    }
+    Mutex::Autolock _l(mLock);
+    if (mpAudioPolicy->set_stream_volume_index_for_device) {
+        return mpAudioPolicy->set_stream_volume_index_for_device(mpAudioPolicy,
+                                                                stream,
+                                                                index,
+                                                                device);
+    } else {
+        return mpAudioPolicy->set_stream_volume_index(mpAudioPolicy, stream, index);
+    }
+}
+
+status_t AudioPolicyService::getStreamVolumeIndex(audio_stream_type_t stream,
+                                                  int *index,
+                                                  audio_devices_t device)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    if (uint32_t(stream) >= AUDIO_STREAM_CNT) {
+        return BAD_VALUE;
+    }
+    Mutex::Autolock _l(mLock);
+    if (mpAudioPolicy->get_stream_volume_index_for_device) {
+        return mpAudioPolicy->get_stream_volume_index_for_device(mpAudioPolicy,
+                                                                stream,
+                                                                index,
+                                                                device);
+    } else {
+        return mpAudioPolicy->get_stream_volume_index(mpAudioPolicy, stream, index);
+    }
+}
+
+uint32_t AudioPolicyService::getStrategyForStream(audio_stream_type_t stream)
+{
+    if (mpAudioPolicy == NULL) {
+        return 0;
+    }
+    return mpAudioPolicy->get_strategy_for_stream(mpAudioPolicy, stream);
+}
+
+//audio policy: use audio_device_t appropriately
+
+audio_devices_t AudioPolicyService::getDevicesForStream(audio_stream_type_t stream)
+{
+    if (mpAudioPolicy == NULL) {
+        return (audio_devices_t)0;
+    }
+    return mpAudioPolicy->get_devices_for_stream(mpAudioPolicy, stream);
+}
+
+audio_io_handle_t AudioPolicyService::getOutputForEffect(const effect_descriptor_t *desc)
+{
+    // FIXME change return type to status_t, and return NO_INIT here
+    if (mpAudioPolicy == NULL) {
+        return 0;
+    }
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->get_output_for_effect(mpAudioPolicy, desc);
+}
+
+status_t AudioPolicyService::registerEffect(const effect_descriptor_t *desc,
+                                audio_io_handle_t io,
+                                uint32_t strategy,
+                                int session,
+                                int id)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    return mpAudioPolicy->register_effect(mpAudioPolicy, desc, io, strategy, session, id);
+}
+
+status_t AudioPolicyService::unregisterEffect(int id)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    return mpAudioPolicy->unregister_effect(mpAudioPolicy, id);
+}
+
+status_t AudioPolicyService::setEffectEnabled(int id, bool enabled)
+{
+    if (mpAudioPolicy == NULL) {
+        return NO_INIT;
+    }
+    return mpAudioPolicy->set_effect_enabled(mpAudioPolicy, id, enabled);
+}
+
+bool AudioPolicyService::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
+{
+    if (mpAudioPolicy == NULL) {
+        return 0;
+    }
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->is_stream_active(mpAudioPolicy, stream, inPastMs);
+}
+
+bool AudioPolicyService::isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs) const
+{
+    if (mpAudioPolicy == NULL) {
+        return 0;
+    }
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->is_stream_active_remotely(mpAudioPolicy, stream, inPastMs);
+}
+
+bool AudioPolicyService::isSourceActive(audio_source_t source) const
+{
+    if (mpAudioPolicy == NULL) {
+        return false;
+    }
+    if (mpAudioPolicy->is_source_active == 0) {
+        return false;
+    }
+    Mutex::Autolock _l(mLock);
+    return mpAudioPolicy->is_source_active(mpAudioPolicy, source);
+}
+
+status_t AudioPolicyService::queryDefaultPreProcessing(int audioSession,
+                                                       effect_descriptor_t *descriptors,
+                                                       uint32_t *count)
+{
+
+    if (mpAudioPolicy == NULL) {
+        *count = 0;
+        return NO_INIT;
+    }
+    Mutex::Autolock _l(mLock);
+    status_t status = NO_ERROR;
+
+    size_t index;
+    for (index = 0; index < mInputs.size(); index++) {
+        if (mInputs.valueAt(index)->mSessionId == audioSession) {
+            break;
+        }
+    }
+    if (index == mInputs.size()) {
+        *count = 0;
+        return BAD_VALUE;
+    }
+    Vector< sp<AudioEffect> > effects = mInputs.valueAt(index)->mEffects;
+
+    for (size_t i = 0; i < effects.size(); i++) {
+        effect_descriptor_t desc = effects[i]->descriptor();
+        if (i < *count) {
+            descriptors[i] = desc;
+        }
+    }
+    if (effects.size() > *count) {
+        status = NO_MEMORY;
+    }
+    *count = effects.size();
+    return status;
+}
+
+void AudioPolicyService::binderDied(const wp<IBinder>& who) {
+    ALOGW("binderDied() %p, calling pid %d", who.unsafe_get(),
+            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(kDumpLockSleepUs);
+    }
+    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", mpAudioPolicy);
+    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 __unused)
+{
+    if (!dumpAllowed()) {
+        dumpPermissionDenial(fd);
+    } else {
+        bool locked = tryLock(mLock);
+        if (!locked) {
+            String8 result(kDeadlockedString);
+            write(fd, result.string(), result.size());
+        }
+
+        dumpInternals(fd);
+        if (mAudioCommandThread != 0) {
+            mAudioCommandThread->dump(fd);
+        }
+        if (mTonePlaybackThread != 0) {
+            mTonePlaybackThread->dump(fd);
+        }
+
+        if (mpAudioPolicy) {
+            mpAudioPolicy->dump(mpAudioPolicy, 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;
+}
+
+void AudioPolicyService::setPreProcessorEnabled(const InputDesc *inputDesc, bool enabled)
+{
+    const Vector<sp<AudioEffect> > &fxVector = inputDesc->mEffects;
+    for (size_t i = 0; i < fxVector.size(); i++) {
+        fxVector.itemAt(i)->setEnabled(enabled);
+    }
+}
+
+status_t AudioPolicyService::onTransact(
+        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    return BnAudioPolicyService::onTransact(code, data, reply, flags);
+}
+
+
+// -----------  AudioPolicyService::AudioCommandThread implementation ----------
+
+AudioPolicyService::AudioCommandThread::AudioCommandThread(String8 name,
+                                                           const wp<AudioPolicyService>& service)
+    : Thread(false), mName(name), mService(service)
+{
+    mpToneGenerator = NULL;
+}
+
+
+AudioPolicyService::AudioCommandThread::~AudioCommandThread()
+{
+    if (!mAudioCommands.isEmpty()) {
+        release_wake_lock(mName.string());
+    }
+    mAudioCommands.clear();
+    delete mpToneGenerator;
+}
+
+void AudioPolicyService::AudioCommandThread::onFirstRef()
+{
+    run(mName.string(), 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;
+                    ALOGV("AudioCommandThread() processing start tone %d on stream %d",
+                            data->mType, data->mStream);
+                    delete mpToneGenerator;
+                    mpToneGenerator = new ToneGenerator(data->mStream, 1.0);
+                    mpToneGenerator->startTone(data->mType);
+                    delete data;
+                    mLock.lock();
+                    }break;
+                case STOP_TONE: {
+                    mLock.unlock();
+                    ALOGV("AudioCommandThread() processing stop tone");
+                    if (mpToneGenerator != NULL) {
+                        mpToneGenerator->stopTone();
+                        delete mpToneGenerator;
+                        mpToneGenerator = NULL;
+                    }
+                    mLock.lock();
+                    }break;
+                case SET_VOLUME: {
+                    VolumeData *data = (VolumeData *)command->mParam;
+                    ALOGV("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();
+                        command->mCond.waitRelative(mLock, kAudioCommandTimeout);
+                    }
+                    delete data;
+                    }break;
+                case SET_PARAMETERS: {
+                    ParametersData *data = (ParametersData *)command->mParam;
+                    ALOGV("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();
+                        command->mCond.waitRelative(mLock, kAudioCommandTimeout);
+                    }
+                    delete data;
+                    }break;
+                case SET_VOICE_VOLUME: {
+                    VoiceVolumeData *data = (VoiceVolumeData *)command->mParam;
+                    ALOGV("AudioCommandThread() processing set voice volume volume %f",
+                            data->mVolume);
+                    command->mStatus = AudioSystem::setVoiceVolume(data->mVolume);
+                    if (command->mWaitStatus) {
+                        command->mCond.signal();
+                        command->mCond.waitRelative(mLock, kAudioCommandTimeout);
+                    }
+                    delete data;
+                    }break;
+                case STOP_OUTPUT: {
+                    StopOutputData *data = (StopOutputData *)command->mParam;
+                    ALOGV("AudioCommandThread() processing stop output %d",
+                            data->mIO);
+                    sp<AudioPolicyService> svc = mService.promote();
+                    if (svc == 0) {
+                        break;
+                    }
+                    mLock.unlock();
+                    svc->doStopOutput(data->mIO, data->mStream, data->mSession);
+                    mLock.lock();
+                    delete data;
+                    }break;
+                case RELEASE_OUTPUT: {
+                    ReleaseOutputData *data = (ReleaseOutputData *)command->mParam;
+                    ALOGV("AudioCommandThread() processing release output %d",
+                            data->mIO);
+                    sp<AudioPolicyService> svc = mService.promote();
+                    if (svc == 0) {
+                        break;
+                    }
+                    mLock.unlock();
+                    svc->doReleaseOutput(data->mIO);
+                    mLock.lock();
+                    delete data;
+                    }break;
+                default:
+                    ALOGW("AudioCommandThread() unknown command %d", command->mCommand);
+                }
+                delete command;
+                waitTime = INT64_MAX;
+            } else {
+                waitTime = mAudioCommands[0]->mTime - curTime;
+                break;
+            }
+        }
+        // release delayed commands wake lock
+        if (mAudioCommands.isEmpty()) {
+            release_wake_lock(mName.string());
+        }
+        ALOGV("AudioCommandThread() going to sleep");
+        mWaitWorkCV.waitRelative(mLock, waitTime);
+        ALOGV("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 (size_t i = 0; i < 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(ToneGenerator::tone_type type,
+        audio_stream_type_t stream)
+{
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = START_TONE;
+    ToneData *data = new ToneData();
+    data->mType = type;
+    data->mStream = stream;
+    command->mParam = (void *)data;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command);
+    ALOGV("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;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command);
+    ALOGV("AudioCommandThread() adding tone stop");
+    mWaitWorkCV.signal();
+}
+
+status_t AudioPolicyService::AudioCommandThread::volumeCommand(audio_stream_type_t stream,
+                                                               float volume,
+                                                               audio_io_handle_t 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;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command, delayMs);
+    ALOGV("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;
+        command->mCond.signal();
+    }
+    return status;
+}
+
+status_t AudioPolicyService::AudioCommandThread::parametersCommand(audio_io_handle_t ioHandle,
+                                                                   const char *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 = String8(keyValuePairs);
+    command->mParam = data;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command, delayMs);
+    ALOGV("AudioCommandThread() adding set parameter string %s, io %d ,delay %d",
+            keyValuePairs, ioHandle, delayMs);
+    mWaitWorkCV.signal();
+    if (command->mWaitStatus) {
+        command->mCond.wait(mLock);
+        status =  command->mStatus;
+        command->mCond.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;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command, delayMs);
+    ALOGV("AudioCommandThread() adding set voice volume volume %f", volume);
+    mWaitWorkCV.signal();
+    if (command->mWaitStatus) {
+        command->mCond.wait(mLock);
+        status =  command->mStatus;
+        command->mCond.signal();
+    }
+    return status;
+}
+
+void AudioPolicyService::AudioCommandThread::stopOutputCommand(audio_io_handle_t output,
+                                                               audio_stream_type_t stream,
+                                                               int session)
+{
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = STOP_OUTPUT;
+    StopOutputData *data = new StopOutputData();
+    data->mIO = output;
+    data->mStream = stream;
+    data->mSession = session;
+    command->mParam = (void *)data;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command);
+    ALOGV("AudioCommandThread() adding stop output %d", output);
+    mWaitWorkCV.signal();
+}
+
+void AudioPolicyService::AudioCommandThread::releaseOutputCommand(audio_io_handle_t output)
+{
+    AudioCommand *command = new AudioCommand();
+    command->mCommand = RELEASE_OUTPUT;
+    ReleaseOutputData *data = new ReleaseOutputData();
+    data->mIO = output;
+    command->mParam = (void *)data;
+    Mutex::Autolock _l(mLock);
+    insertCommand_l(command);
+    ALOGV("AudioCommandThread() adding release output %d", output);
+    mWaitWorkCV.signal();
+}
+
+// insertCommand_l() must be called with mLock held
+void AudioPolicyService::AudioCommandThread::insertCommand_l(AudioCommand *command, int delayMs)
+{
+    ssize_t i;  // not size_t because i will count down to -1
+    Vector <AudioCommand *> removedCommands;
+    command->mTime = systemTime() + milliseconds(delayMs);
+
+    // acquire wake lock to make sure delayed commands are processed
+    if (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;
+            ALOGV("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);
+                        ALOGV("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();
+            }
+            command->mTime = command2->mTime;
+            // force delayMs to non 0 so that code below does not request to wait for
+            // command status as the command is now delayed
+            delayMs = 1;
+        } 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;
+            ALOGV("Filtering out volume command on output %d for stream %d",
+                    data->mIO, data->mStream);
+            removedCommands.add(command2);
+            command->mTime = command2->mTime;
+            // force delayMs to non 0 so that code below does not request to wait for
+            // command status as the command is now delayed
+            delayMs = 1;
+        } 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]) {
+                ALOGV("suppressing command: %d", mAudioCommands[k]->mCommand);
+                mAudioCommands.removeAt(k);
+                break;
+            }
+        }
+    }
+    removedCommands.clear();
+
+    // wait for status only if delay is 0
+    if (delayMs == 0) {
+        command->mWaitStatus = true;
+    } else {
+        command->mWaitStatus = false;
+    }
+
+    // insert command at the right place according to its time stamp
+    ALOGV("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()
+{
+    ALOGV("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);
+}
+
+/******* helpers for the service_ops callbacks defined below *********/
+void AudioPolicyService::setParameters(audio_io_handle_t ioHandle,
+                                       const char *keyValuePairs,
+                                       int delayMs)
+{
+    mAudioCommandThread->parametersCommand(ioHandle, keyValuePairs,
+                                           delayMs);
+}
+
+int AudioPolicyService::setStreamVolume(audio_stream_type_t stream,
+                                        float volume,
+                                        audio_io_handle_t output,
+                                        int delayMs)
+{
+    return (int)mAudioCommandThread->volumeCommand(stream, volume,
+                                                   output, delayMs);
+}
+
+int AudioPolicyService::startTone(audio_policy_tone_t tone,
+                                  audio_stream_type_t stream)
+{
+    if (tone != AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION) {
+        ALOGE("startTone: illegal tone requested (%d)", tone);
+    }
+    if (stream != AUDIO_STREAM_VOICE_CALL) {
+        ALOGE("startTone: illegal stream (%d) requested for tone %d", stream,
+            tone);
+    }
+    mTonePlaybackThread->startToneCommand(ToneGenerator::TONE_SUP_CALL_WAITING,
+                                          AUDIO_STREAM_VOICE_CALL);
+    return 0;
+}
+
+int AudioPolicyService::stopTone()
+{
+    mTonePlaybackThread->stopToneCommand();
+    return 0;
+}
+
+int AudioPolicyService::setVoiceVolume(float volume, int delayMs)
+{
+    return (int)mAudioCommandThread->voiceVolumeCommand(volume, delayMs);
+}
+
+bool AudioPolicyService::isOffloadSupported(const audio_offload_info_t& info)
+{
+    if (mpAudioPolicy == NULL) {
+        ALOGV("mpAudioPolicy == NULL");
+        return false;
+    }
+
+    if (mpAudioPolicy->is_offload_supported == NULL) {
+        ALOGV("HAL does not implement is_offload_supported");
+        return false;
+    }
+
+    return mpAudioPolicy->is_offload_supported(mpAudioPolicy, &info);
+}
+
+// ----------------------------------------------------------------------------
+// Audio pre-processing configuration
+// ----------------------------------------------------------------------------
+
+/*static*/ const char * const AudioPolicyService::kInputSourceNames[AUDIO_SOURCE_CNT -1] = {
+    MIC_SRC_TAG,
+    VOICE_UL_SRC_TAG,
+    VOICE_DL_SRC_TAG,
+    VOICE_CALL_SRC_TAG,
+    CAMCORDER_SRC_TAG,
+    VOICE_REC_SRC_TAG,
+    VOICE_COMM_SRC_TAG
+};
+
+// returns the audio_source_t enum corresponding to the input source name or
+// AUDIO_SOURCE_CNT is no match found
+audio_source_t AudioPolicyService::inputSourceNameToEnum(const char *name)
+{
+    int i;
+    for (i = AUDIO_SOURCE_MIC; i < AUDIO_SOURCE_CNT; i++) {
+        if (strcmp(name, kInputSourceNames[i - AUDIO_SOURCE_MIC]) == 0) {
+            ALOGV("inputSourceNameToEnum found source %s %d", name, i);
+            break;
+        }
+    }
+    return (audio_source_t)i;
+}
+
+size_t AudioPolicyService::growParamSize(char *param,
+                                         size_t size,
+                                         size_t *curSize,
+                                         size_t *totSize)
+{
+    // *curSize is at least sizeof(effect_param_t) + 2 * sizeof(int)
+    size_t pos = ((*curSize - 1 ) / size + 1) * size;
+
+    if (pos + size > *totSize) {
+        while (pos + size > *totSize) {
+            *totSize += ((*totSize + 7) / 8) * 4;
+        }
+        param = (char *)realloc(param, *totSize);
+    }
+    *curSize = pos + size;
+    return pos;
+}
+
+size_t AudioPolicyService::readParamValue(cnode *node,
+                                          char *param,
+                                          size_t *curSize,
+                                          size_t *totSize)
+{
+    if (strncmp(node->name, SHORT_TAG, sizeof(SHORT_TAG) + 1) == 0) {
+        size_t pos = growParamSize(param, sizeof(short), curSize, totSize);
+        *(short *)((char *)param + pos) = (short)atoi(node->value);
+        ALOGV("readParamValue() reading short %d", *(short *)((char *)param + pos));
+        return sizeof(short);
+    } else if (strncmp(node->name, INT_TAG, sizeof(INT_TAG) + 1) == 0) {
+        size_t pos = growParamSize(param, sizeof(int), curSize, totSize);
+        *(int *)((char *)param + pos) = atoi(node->value);
+        ALOGV("readParamValue() reading int %d", *(int *)((char *)param + pos));
+        return sizeof(int);
+    } else if (strncmp(node->name, FLOAT_TAG, sizeof(FLOAT_TAG) + 1) == 0) {
+        size_t pos = growParamSize(param, sizeof(float), curSize, totSize);
+        *(float *)((char *)param + pos) = (float)atof(node->value);
+        ALOGV("readParamValue() reading float %f",*(float *)((char *)param + pos));
+        return sizeof(float);
+    } else if (strncmp(node->name, BOOL_TAG, sizeof(BOOL_TAG) + 1) == 0) {
+        size_t pos = growParamSize(param, sizeof(bool), curSize, totSize);
+        if (strncmp(node->value, "false", strlen("false") + 1) == 0) {
+            *(bool *)((char *)param + pos) = false;
+        } else {
+            *(bool *)((char *)param + pos) = true;
+        }
+        ALOGV("readParamValue() reading bool %s",*(bool *)((char *)param + pos) ? "true" : "false");
+        return sizeof(bool);
+    } else if (strncmp(node->name, STRING_TAG, sizeof(STRING_TAG) + 1) == 0) {
+        size_t len = strnlen(node->value, EFFECT_STRING_LEN_MAX);
+        if (*curSize + len + 1 > *totSize) {
+            *totSize = *curSize + len + 1;
+            param = (char *)realloc(param, *totSize);
+        }
+        strncpy(param + *curSize, node->value, len);
+        *curSize += len;
+        param[*curSize] = '\0';
+        ALOGV("readParamValue() reading string %s", param + *curSize - len);
+        return len;
+    }
+    ALOGW("readParamValue() unknown param type %s", node->name);
+    return 0;
+}
+
+effect_param_t *AudioPolicyService::loadEffectParameter(cnode *root)
+{
+    cnode *param;
+    cnode *value;
+    size_t curSize = sizeof(effect_param_t);
+    size_t totSize = sizeof(effect_param_t) + 2 * sizeof(int);
+    effect_param_t *fx_param = (effect_param_t *)malloc(totSize);
+
+    param = config_find(root, PARAM_TAG);
+    value = config_find(root, VALUE_TAG);
+    if (param == NULL && value == NULL) {
+        // try to parse simple parameter form {int int}
+        param = root->first_child;
+        if (param != NULL) {
+            // Note: that a pair of random strings is read as 0 0
+            int *ptr = (int *)fx_param->data;
+            int *ptr2 = (int *)((char *)param + sizeof(effect_param_t));
+            ALOGW("loadEffectParameter() ptr %p ptr2 %p", ptr, ptr2);
+            *ptr++ = atoi(param->name);
+            *ptr = atoi(param->value);
+            fx_param->psize = sizeof(int);
+            fx_param->vsize = sizeof(int);
+            return fx_param;
+        }
+    }
+    if (param == NULL || value == NULL) {
+        ALOGW("loadEffectParameter() invalid parameter description %s", root->name);
+        goto error;
+    }
+
+    fx_param->psize = 0;
+    param = param->first_child;
+    while (param) {
+        ALOGV("loadEffectParameter() reading param of type %s", param->name);
+        size_t size = readParamValue(param, (char *)fx_param, &curSize, &totSize);
+        if (size == 0) {
+            goto error;
+        }
+        fx_param->psize += size;
+        param = param->next;
+    }
+
+    // align start of value field on 32 bit boundary
+    curSize = ((curSize - 1 ) / sizeof(int) + 1) * sizeof(int);
+
+    fx_param->vsize = 0;
+    value = value->first_child;
+    while (value) {
+        ALOGV("loadEffectParameter() reading value of type %s", value->name);
+        size_t size = readParamValue(value, (char *)fx_param, &curSize, &totSize);
+        if (size == 0) {
+            goto error;
+        }
+        fx_param->vsize += size;
+        value = value->next;
+    }
+
+    return fx_param;
+
+error:
+    delete fx_param;
+    return NULL;
+}
+
+void AudioPolicyService::loadEffectParameters(cnode *root, Vector <effect_param_t *>& params)
+{
+    cnode *node = root->first_child;
+    while (node) {
+        ALOGV("loadEffectParameters() loading param %s", node->name);
+        effect_param_t *param = loadEffectParameter(node);
+        if (param == NULL) {
+            node = node->next;
+            continue;
+        }
+        params.add(param);
+        node = node->next;
+    }
+}
+
+AudioPolicyService::InputSourceDesc *AudioPolicyService::loadInputSource(
+                                                            cnode *root,
+                                                            const Vector <EffectDesc *>& effects)
+{
+    cnode *node = root->first_child;
+    if (node == NULL) {
+        ALOGW("loadInputSource() empty element %s", root->name);
+        return NULL;
+    }
+    InputSourceDesc *source = new InputSourceDesc();
+    while (node) {
+        size_t i;
+        for (i = 0; i < effects.size(); i++) {
+            if (strncmp(effects[i]->mName, node->name, EFFECT_STRING_LEN_MAX) == 0) {
+                ALOGV("loadInputSource() found effect %s in list", node->name);
+                break;
+            }
+        }
+        if (i == effects.size()) {
+            ALOGV("loadInputSource() effect %s not in list", node->name);
+            node = node->next;
+            continue;
+        }
+        EffectDesc *effect = new EffectDesc(*effects[i]);   // deep copy
+        loadEffectParameters(node, effect->mParams);
+        ALOGV("loadInputSource() adding effect %s uuid %08x", effect->mName, effect->mUuid.timeLow);
+        source->mEffects.add(effect);
+        node = node->next;
+    }
+    if (source->mEffects.size() == 0) {
+        ALOGW("loadInputSource() no valid effects found in source %s", root->name);
+        delete source;
+        return NULL;
+    }
+    return source;
+}
+
+status_t AudioPolicyService::loadInputSources(cnode *root, const Vector <EffectDesc *>& effects)
+{
+    cnode *node = config_find(root, PREPROCESSING_TAG);
+    if (node == NULL) {
+        return -ENOENT;
+    }
+    node = node->first_child;
+    while (node) {
+        audio_source_t source = inputSourceNameToEnum(node->name);
+        if (source == AUDIO_SOURCE_CNT) {
+            ALOGW("loadInputSources() invalid input source %s", node->name);
+            node = node->next;
+            continue;
+        }
+        ALOGV("loadInputSources() loading input source %s", node->name);
+        InputSourceDesc *desc = loadInputSource(node, effects);
+        if (desc == NULL) {
+            node = node->next;
+            continue;
+        }
+        mInputSources.add(source, desc);
+        node = node->next;
+    }
+    return NO_ERROR;
+}
+
+AudioPolicyService::EffectDesc *AudioPolicyService::loadEffect(cnode *root)
+{
+    cnode *node = config_find(root, UUID_TAG);
+    if (node == NULL) {
+        return NULL;
+    }
+    effect_uuid_t uuid;
+    if (AudioEffect::stringToGuid(node->value, &uuid) != NO_ERROR) {
+        ALOGW("loadEffect() invalid uuid %s", node->value);
+        return NULL;
+    }
+    return new EffectDesc(root->name, uuid);
+}
+
+status_t AudioPolicyService::loadEffects(cnode *root, Vector <EffectDesc *>& effects)
+{
+    cnode *node = config_find(root, EFFECTS_TAG);
+    if (node == NULL) {
+        return -ENOENT;
+    }
+    node = node->first_child;
+    while (node) {
+        ALOGV("loadEffects() loading effect %s", node->name);
+        EffectDesc *effect = loadEffect(node);
+        if (effect == NULL) {
+            node = node->next;
+            continue;
+        }
+        effects.add(effect);
+        node = node->next;
+    }
+    return NO_ERROR;
+}
+
+status_t AudioPolicyService::loadPreProcessorConfig(const char *path)
+{
+    cnode *root;
+    char *data;
+
+    data = (char *)load_file(path, NULL);
+    if (data == NULL) {
+        return -ENODEV;
+    }
+    root = config_node("", "");
+    config_load(root, data);
+
+    Vector <EffectDesc *> effects;
+    loadEffects(root, effects);
+    loadInputSources(root, effects);
+
+    // delete effects to fix memory leak.
+    // as effects is local var and valgrind would treat this as memory leak
+    // and although it only did in mediaserver init, but free it in case mediaserver reboot
+    size_t i;
+    for (i = 0; i < effects.size(); i++) {
+      delete effects[i];
+    }
+
+    config_free(root);
+    free(root);
+    free(data);
+
+    return NO_ERROR;
+}
+
+/* implementation of the interface to the policy manager */
+extern "C" {
+
+
+static audio_module_handle_t aps_load_hw_module(void *service __unused,
+                                             const char *name)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return 0;
+    }
+
+    return af->loadHwModule(name);
+}
+
+// deprecated: replaced by aps_open_output_on_module()
+static audio_io_handle_t aps_open_output(void *service __unused,
+                                         audio_devices_t *pDevices,
+                                         uint32_t *pSamplingRate,
+                                         audio_format_t *pFormat,
+                                         audio_channel_mask_t *pChannelMask,
+                                         uint32_t *pLatencyMs,
+                                         audio_output_flags_t flags)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return 0;
+    }
+
+    return af->openOutput((audio_module_handle_t)0, pDevices, pSamplingRate, pFormat, pChannelMask,
+                          pLatencyMs, flags);
+}
+
+static audio_io_handle_t aps_open_output_on_module(void *service __unused,
+                                                   audio_module_handle_t module,
+                                                   audio_devices_t *pDevices,
+                                                   uint32_t *pSamplingRate,
+                                                   audio_format_t *pFormat,
+                                                   audio_channel_mask_t *pChannelMask,
+                                                   uint32_t *pLatencyMs,
+                                                   audio_output_flags_t flags,
+                                                   const audio_offload_info_t *offloadInfo)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return 0;
+    }
+    return af->openOutput(module, pDevices, pSamplingRate, pFormat, pChannelMask,
+                          pLatencyMs, flags, offloadInfo);
+}
+
+static audio_io_handle_t aps_open_dup_output(void *service __unused,
+                                                 audio_io_handle_t output1,
+                                                 audio_io_handle_t output2)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return 0;
+    }
+    return af->openDuplicateOutput(output1, output2);
+}
+
+static int aps_close_output(void *service __unused, audio_io_handle_t output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        return PERMISSION_DENIED;
+    }
+
+    return af->closeOutput(output);
+}
+
+static int aps_suspend_output(void *service __unused, audio_io_handle_t output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return PERMISSION_DENIED;
+    }
+
+    return af->suspendOutput(output);
+}
+
+static int aps_restore_output(void *service __unused, audio_io_handle_t output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return PERMISSION_DENIED;
+    }
+
+    return af->restoreOutput(output);
+}
+
+// deprecated: replaced by aps_open_input_on_module(), and acoustics parameter is ignored
+static audio_io_handle_t aps_open_input(void *service __unused,
+                                        audio_devices_t *pDevices,
+                                        uint32_t *pSamplingRate,
+                                        audio_format_t *pFormat,
+                                        audio_channel_mask_t *pChannelMask,
+                                        audio_in_acoustics_t acoustics __unused)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return 0;
+    }
+
+    return af->openInput((audio_module_handle_t)0, pDevices, pSamplingRate, pFormat, pChannelMask);
+}
+
+static audio_io_handle_t aps_open_input_on_module(void *service __unused,
+                                                  audio_module_handle_t module,
+                                                  audio_devices_t *pDevices,
+                                                  uint32_t *pSamplingRate,
+                                                  audio_format_t *pFormat,
+                                                  audio_channel_mask_t *pChannelMask)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return 0;
+    }
+
+    return af->openInput(module, pDevices, pSamplingRate, pFormat, pChannelMask);
+}
+
+static int aps_close_input(void *service __unused, audio_io_handle_t input)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        return PERMISSION_DENIED;
+    }
+
+    return af->closeInput(input);
+}
+
+static int aps_invalidate_stream(void *service __unused, audio_stream_type_t stream)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        return PERMISSION_DENIED;
+    }
+
+    return af->invalidateStream(stream);
+}
+
+static int aps_move_effects(void *service __unused, int session,
+                                audio_io_handle_t src_output,
+                                audio_io_handle_t dst_output)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        return PERMISSION_DENIED;
+    }
+
+    return af->moveEffects(session, src_output, dst_output);
+}
+
+static char * aps_get_parameters(void *service __unused, audio_io_handle_t io_handle,
+                                     const char *keys)
+{
+    String8 result = AudioSystem::getParameters(io_handle, String8(keys));
+    return strdup(result.string());
+}
+
+static void aps_set_parameters(void *service, audio_io_handle_t io_handle,
+                                   const char *kv_pairs, int delay_ms)
+{
+    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
+
+    audioPolicyService->setParameters(io_handle, kv_pairs, delay_ms);
+}
+
+static int aps_set_stream_volume(void *service, audio_stream_type_t stream,
+                                     float volume, audio_io_handle_t output,
+                                     int delay_ms)
+{
+    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
+
+    return audioPolicyService->setStreamVolume(stream, volume, output,
+                                               delay_ms);
+}
+
+static int aps_start_tone(void *service, audio_policy_tone_t tone,
+                              audio_stream_type_t stream)
+{
+    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
+
+    return audioPolicyService->startTone(tone, stream);
+}
+
+static int aps_stop_tone(void *service)
+{
+    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
+
+    return audioPolicyService->stopTone();
+}
+
+static int aps_set_voice_volume(void *service, float volume, int delay_ms)
+{
+    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
+
+    return audioPolicyService->setVoiceVolume(volume, delay_ms);
+}
+
+}; // extern "C"
+
+namespace {
+    struct audio_policy_service_ops aps_ops = {
+        .open_output           = aps_open_output,
+        .open_duplicate_output = aps_open_dup_output,
+        .close_output          = aps_close_output,
+        .suspend_output        = aps_suspend_output,
+        .restore_output        = aps_restore_output,
+        .open_input            = aps_open_input,
+        .close_input           = aps_close_input,
+        .set_stream_volume     = aps_set_stream_volume,
+        .invalidate_stream     = aps_invalidate_stream,
+        .set_parameters        = aps_set_parameters,
+        .get_parameters        = aps_get_parameters,
+        .start_tone            = aps_start_tone,
+        .stop_tone             = aps_stop_tone,
+        .set_voice_volume      = aps_set_voice_volume,
+        .move_effects          = aps_move_effects,
+        .load_hw_module        = aps_load_hw_module,
+        .open_output_on_module = aps_open_output_on_module,
+        .open_input_on_module  = aps_open_input_on_module,
+    };
+}; // namespace <unnamed>
+
+}; // namespace android
diff --git a/services/audiopolicy/AudioPolicyService.h b/services/audiopolicy/AudioPolicyService.h
new file mode 100644
index 0000000..ae053a9
--- /dev/null
+++ b/services/audiopolicy/AudioPolicyService.h
@@ -0,0 +1,353 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_AUDIOPOLICYSERVICE_H
+#define ANDROID_AUDIOPOLICYSERVICE_H
+
+#include <cutils/misc.h>
+#include <cutils/config_utils.h>
+#include <cutils/compiler.h>
+#include <utils/String8.h>
+#include <utils/Vector.h>
+#include <utils/SortedVector.h>
+#include <binder/BinderService.h>
+#include <system/audio.h>
+#include <system/audio_policy.h>
+#include <hardware/audio_policy.h>
+#include <media/IAudioPolicyService.h>
+#include <media/ToneGenerator.h>
+#include <media/AudioEffect.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+class AudioPolicyService :
+    public BinderService<AudioPolicyService>,
+    public BnAudioPolicyService,
+//    public AudioPolicyClientInterface,
+    public IBinder::DeathRecipient
+{
+    friend class BinderService<AudioPolicyService>;
+
+public:
+    // for BinderService
+    static const char *getServiceName() ANDROID_API { return "media.audio_policy"; }
+
+    virtual status_t    dump(int fd, const Vector<String16>& args);
+
+    //
+    // BnAudioPolicyService (see AudioPolicyInterface for method descriptions)
+    //
+
+    virtual status_t setDeviceConnectionState(audio_devices_t device,
+                                              audio_policy_dev_state_t state,
+                                              const char *device_address);
+    virtual audio_policy_dev_state_t getDeviceConnectionState(
+                                                                audio_devices_t device,
+                                                                const char *device_address);
+    virtual status_t setPhoneState(audio_mode_t state);
+    virtual status_t setForceUse(audio_policy_force_use_t usage, audio_policy_forced_cfg_t config);
+    virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage);
+    virtual audio_io_handle_t getOutput(audio_stream_type_t stream,
+                                        uint32_t samplingRate = 0,
+                                        audio_format_t format = AUDIO_FORMAT_DEFAULT,
+                                        audio_channel_mask_t channelMask = 0,
+                                        audio_output_flags_t flags =
+                                                AUDIO_OUTPUT_FLAG_NONE,
+                                        const audio_offload_info_t *offloadInfo = NULL);
+    virtual status_t startOutput(audio_io_handle_t output,
+                                 audio_stream_type_t stream,
+                                 int session = 0);
+    virtual status_t stopOutput(audio_io_handle_t output,
+                                audio_stream_type_t stream,
+                                int session = 0);
+    virtual void releaseOutput(audio_io_handle_t output);
+    virtual audio_io_handle_t getInput(audio_source_t inputSource,
+                                    uint32_t samplingRate = 0,
+                                    audio_format_t format = AUDIO_FORMAT_DEFAULT,
+                                    audio_channel_mask_t channelMask = 0,
+                                    int audioSession = 0);
+    virtual status_t startInput(audio_io_handle_t input);
+    virtual status_t stopInput(audio_io_handle_t input);
+    virtual void releaseInput(audio_io_handle_t input);
+    virtual status_t initStreamVolume(audio_stream_type_t stream,
+                                      int indexMin,
+                                      int indexMax);
+    virtual status_t setStreamVolumeIndex(audio_stream_type_t stream,
+                                          int index,
+                                          audio_devices_t device);
+    virtual status_t getStreamVolumeIndex(audio_stream_type_t stream,
+                                          int *index,
+                                          audio_devices_t device);
+
+    virtual uint32_t getStrategyForStream(audio_stream_type_t stream);
+    virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream);
+
+    virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc);
+    virtual status_t registerEffect(const effect_descriptor_t *desc,
+                                    audio_io_handle_t io,
+                                    uint32_t strategy,
+                                    int session,
+                                    int id);
+    virtual status_t unregisterEffect(int id);
+    virtual status_t setEffectEnabled(int id, bool enabled);
+    virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const;
+    virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const;
+    virtual bool isSourceActive(audio_source_t source) const;
+
+    virtual status_t queryDefaultPreProcessing(int audioSession,
+                                              effect_descriptor_t *descriptors,
+                                              uint32_t *count);
+    virtual     status_t    onTransact(
+                                uint32_t code,
+                                const Parcel& data,
+                                Parcel* reply,
+                                uint32_t flags);
+
+    // IBinder::DeathRecipient
+    virtual     void        binderDied(const wp<IBinder>& who);
+
+    //
+    // Helpers for the struct audio_policy_service_ops implementation.
+    // This is used by the audio policy manager for certain operations that
+    // are implemented by the policy service.
+    //
+    virtual void setParameters(audio_io_handle_t ioHandle,
+                               const char *keyValuePairs,
+                               int delayMs);
+
+    virtual status_t setStreamVolume(audio_stream_type_t stream,
+                                     float volume,
+                                     audio_io_handle_t output,
+                                     int delayMs = 0);
+    virtual status_t startTone(audio_policy_tone_t tone, audio_stream_type_t stream);
+    virtual status_t stopTone();
+    virtual status_t setVoiceVolume(float volume, int delayMs = 0);
+    virtual bool isOffloadSupported(const audio_offload_info_t &config);
+
+            status_t doStopOutput(audio_io_handle_t output,
+                                  audio_stream_type_t stream,
+                                  int session = 0);
+            void doReleaseOutput(audio_io_handle_t output);
+
+private:
+                        AudioPolicyService() ANDROID_API;
+    virtual             ~AudioPolicyService();
+
+            status_t dumpInternals(int fd);
+
+    // Thread used for tone playback and to send audio config commands to audio flinger
+    // For tone playback, using a separate thread is necessary to avoid deadlock with mLock because
+    // startTone() and stopTone() are normally called with mLock locked and requesting a tone start
+    // or stop will cause calls to AudioPolicyService and an attempt to lock mLock.
+    // For audio config commands, it is necessary because audio flinger requires that the calling
+    // process (user) has permission to modify audio settings.
+    class AudioCommandThread : public Thread {
+        class AudioCommand;
+    public:
+
+        // commands for tone AudioCommand
+        enum {
+            START_TONE,
+            STOP_TONE,
+            SET_VOLUME,
+            SET_PARAMETERS,
+            SET_VOICE_VOLUME,
+            STOP_OUTPUT,
+            RELEASE_OUTPUT
+        };
+
+        AudioCommandThread (String8 name, const wp<AudioPolicyService>& service);
+        virtual             ~AudioCommandThread();
+
+                    status_t    dump(int fd);
+
+        // Thread virtuals
+        virtual     void        onFirstRef();
+        virtual     bool        threadLoop();
+
+                    void        exit();
+                    void        startToneCommand(ToneGenerator::tone_type type,
+                                                 audio_stream_type_t stream);
+                    void        stopToneCommand();
+                    status_t    volumeCommand(audio_stream_type_t stream, float volume,
+                                            audio_io_handle_t output, int delayMs = 0);
+                    status_t    parametersCommand(audio_io_handle_t ioHandle,
+                                            const char *keyValuePairs, int delayMs = 0);
+                    status_t    voiceVolumeCommand(float volume, int delayMs = 0);
+                    void        stopOutputCommand(audio_io_handle_t output,
+                                                  audio_stream_type_t stream,
+                                                  int session);
+                    void        releaseOutputCommand(audio_io_handle_t output);
+
+                    void        insertCommand_l(AudioCommand *command, int delayMs = 0);
+
+    private:
+        // descriptor for requested tone playback event
+        class AudioCommand {
+
+        public:
+            AudioCommand()
+            : mCommand(-1) {}
+
+            void dump(char* buffer, size_t size);
+
+            int mCommand;   // START_TONE, STOP_TONE ...
+            nsecs_t mTime;  // time stamp
+            Condition mCond; // condition for status return
+            status_t mStatus; // command status
+            bool mWaitStatus; // true if caller is waiting for status
+            void *mParam;     // command parameter (ToneData, VolumeData, ParametersData)
+        };
+
+        class ToneData {
+        public:
+            ToneGenerator::tone_type mType; // tone type (START_TONE only)
+            audio_stream_type_t mStream;    // stream type (START_TONE only)
+        };
+
+        class VolumeData {
+        public:
+            audio_stream_type_t mStream;
+            float mVolume;
+            audio_io_handle_t mIO;
+        };
+
+        class ParametersData {
+        public:
+            audio_io_handle_t mIO;
+            String8 mKeyValuePairs;
+        };
+
+        class VoiceVolumeData {
+        public:
+            float mVolume;
+        };
+
+        class StopOutputData {
+        public:
+            audio_io_handle_t mIO;
+            audio_stream_type_t mStream;
+            int mSession;
+        };
+
+        class ReleaseOutputData {
+        public:
+            audio_io_handle_t mIO;
+        };
+
+        Mutex   mLock;
+        Condition mWaitWorkCV;
+        Vector <AudioCommand *> mAudioCommands; // list of pending commands
+        ToneGenerator *mpToneGenerator;     // the tone generator
+        AudioCommand mLastCommand;          // last processed command (used by dump)
+        String8 mName;                      // string used by wake lock fo delayed commands
+        wp<AudioPolicyService> mService;
+    };
+
+    class EffectDesc {
+    public:
+        EffectDesc(const char *name, const effect_uuid_t& uuid) :
+                        mName(strdup(name)),
+                        mUuid(uuid) { }
+        EffectDesc(const EffectDesc& orig) :
+                        mName(strdup(orig.mName)),
+                        mUuid(orig.mUuid) {
+                            // deep copy mParams
+                            for (size_t k = 0; k < orig.mParams.size(); k++) {
+                                effect_param_t *origParam = orig.mParams[k];
+                                // psize and vsize are rounded up to an int boundary for allocation
+                                size_t origSize = sizeof(effect_param_t) +
+                                                  ((origParam->psize + 3) & ~3) +
+                                                  ((origParam->vsize + 3) & ~3);
+                                effect_param_t *dupParam = (effect_param_t *) malloc(origSize);
+                                memcpy(dupParam, origParam, origSize);
+                                // This works because the param buffer allocation is also done by
+                                // multiples of 4 bytes originally. In theory we should memcpy only
+                                // the actual param size, that is without rounding vsize.
+                                mParams.add(dupParam);
+                            }
+                        }
+        /*virtual*/ ~EffectDesc() {
+            free(mName);
+            for (size_t k = 0; k < mParams.size(); k++) {
+                free(mParams[k]);
+            }
+        }
+        char *mName;
+        effect_uuid_t mUuid;
+        Vector <effect_param_t *> mParams;
+    };
+
+    class InputSourceDesc {
+    public:
+        InputSourceDesc() {}
+        /*virtual*/ ~InputSourceDesc() {
+            for (size_t j = 0; j < mEffects.size(); j++) {
+                delete mEffects[j];
+            }
+        }
+        Vector <EffectDesc *> mEffects;
+    };
+
+
+    class InputDesc {
+    public:
+        InputDesc(int session) : mSessionId(session) {}
+        /*virtual*/ ~InputDesc() {}
+        const int mSessionId;
+        Vector< sp<AudioEffect> >mEffects;
+    };
+
+    static const char * const kInputSourceNames[AUDIO_SOURCE_CNT -1];
+
+    void setPreProcessorEnabled(const InputDesc *inputDesc, bool enabled);
+    status_t loadPreProcessorConfig(const char *path);
+    status_t loadEffects(cnode *root, Vector <EffectDesc *>& effects);
+    EffectDesc *loadEffect(cnode *root);
+    status_t loadInputSources(cnode *root, const Vector <EffectDesc *>& effects);
+    audio_source_t inputSourceNameToEnum(const char *name);
+    InputSourceDesc *loadInputSource(cnode *root, const Vector <EffectDesc *>& effects);
+    void loadEffectParameters(cnode *root, Vector <effect_param_t *>& params);
+    effect_param_t *loadEffectParameter(cnode *root);
+    size_t readParamValue(cnode *node,
+                          char *param,
+                          size_t *curSize,
+                          size_t *totSize);
+    size_t growParamSize(char *param,
+                         size_t size,
+                         size_t *curSize,
+                         size_t *totSize);
+
+    // Internal dump utilities.
+    status_t dumpPermissionDenial(int fd);
+
+
+    mutable Mutex mLock;    // prevents concurrent access to AudioPolicy manager functions changing
+                            // device connection state  or routing
+    sp<AudioCommandThread> mAudioCommandThread;     // audio commands thread
+    sp<AudioCommandThread> mTonePlaybackThread;     // tone playback thread
+    sp<AudioCommandThread> mOutputCommandThread;    // process stop and release output
+    struct audio_policy_device *mpAudioPolicyDev;
+    struct audio_policy *mpAudioPolicy;
+    KeyedVector< audio_source_t, InputSourceDesc* > mInputSources;
+    KeyedVector< audio_io_handle_t, InputDesc* > mInputs;
+};
+
+}; // namespace android
+
+#endif // ANDROID_AUDIOPOLICYSERVICE_H