S5PC11X: crespo: add alsa-lib, alsa-utils, libaudio, libcamera

Change-Id: I4a6ee248b407c67682eb8884d1176f4807288c7c

1 files changed, 1865 insertions, 0 deletions

diff --git a/libaudio/AudioPolicyManager.cpp b/libaudio/AudioPolicyManager.cpp
new file mode 100644
index 0000000..a2b4651
--- /dev/null
+++ b/libaudio/AudioPolicyManager.cpp
@@ -0,0 +1,1865 @@
+/*
+ * 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 "AudioPolicyManager"
+//#define LOG_NDEBUG 0
+#include <utils/Log.h>
+#include "AudioPolicyManager.h"
+#include <media/mediarecorder.h>
+
+namespace android {
+
+
+// ----------------------------------------------------------------------------
+// AudioPolicyInterface implementation
+// ----------------------------------------------------------------------------
+
+
+status_t AudioPolicyManager::setDeviceConnectionState(AudioSystem::audio_devices device,
+                                                  AudioSystem::device_connection_state state,
+                                                  const char *device_address)
+{
+
+    LOGV("setDeviceConnectionState() device: %x, state %d, address %s", device, state, device_address);
+
+    // connect/disconnect only 1 device at a time
+    if (AudioSystem::popCount(device) != 1) return BAD_VALUE;
+
+    if (strlen(device_address) >= MAX_DEVICE_ADDRESS_LEN) {
+        LOGE("setDeviceConnectionState() invalid address: %s", device_address);
+        return BAD_VALUE;
+    }
+
+    // handle output devices
+    if (AudioSystem::isOutputDevice(device)) {
+
+#ifndef WITH_A2DP
+        if (AudioSystem::isA2dpDevice(device)) {
+            LOGE("setDeviceConnectionState() invalid device: %x", device);
+            return BAD_VALUE;
+        }
+#endif
+
+        switch (state)
+        {
+        // handle output device connection
+        case AudioSystem::DEVICE_STATE_AVAILABLE:
+            if (mAvailableOutputDevices & device) {
+                LOGW("setDeviceConnectionState() device already connected: %x", device);
+                return INVALID_OPERATION;
+            }
+            LOGW_IF((getOutputForDevice((uint32_t)device) != 0), "setDeviceConnectionState(): output using unconnected device %x", device);
+
+            LOGV("setDeviceConnectionState() connecting device %x", device);
+
+            // register new device as available
+            mAvailableOutputDevices |= device;
+
+#ifdef WITH_A2DP
+            // handle A2DP device connection
+            if (AudioSystem::isA2dpDevice(device)) {
+                // when an A2DP device is connected, open an A2DP and a duplicated output
+                LOGV("opening A2DP output for device %s", device_address);
+                AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor();
+                outputDesc->mDevice = device;
+                mA2dpOutput = mpClientInterface->openOutput(&outputDesc->mDevice,
+                                                        &outputDesc->mSamplingRate,
+                                                        &outputDesc->mFormat,
+                                                        &outputDesc->mChannels,
+                                                        &outputDesc->mLatency,
+                                                        outputDesc->mFlags);
+                if (mA2dpOutput) {
+                    // add A2DP output descriptor
+                    mOutputs.add(mA2dpOutput, outputDesc);
+                    // set initial stream volume for A2DP device
+                    applyStreamVolumes(mA2dpOutput, device);
+                    mDuplicatedOutput = mpClientInterface->openDuplicateOutput(mA2dpOutput, mHardwareOutput);
+                    if (mDuplicatedOutput != 0) {
+                        // If both A2DP and duplicated outputs are open, send device address to A2DP hardware
+                        // interface
+                        AudioParameter param;
+                        param.add(String8("a2dp_sink_address"), String8(device_address));
+                        mpClientInterface->setParameters(mA2dpOutput, param.toString());
+                        mA2dpDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
+
+                        // add duplicated output descriptor
+                        AudioOutputDescriptor *dupOutputDesc = new AudioOutputDescriptor();
+                        dupOutputDesc->mOutput1 = mOutputs.valueFor(mHardwareOutput);
+                        dupOutputDesc->mOutput2 = mOutputs.valueFor(mA2dpOutput);
+                        dupOutputDesc->mSamplingRate = outputDesc->mSamplingRate;
+                        dupOutputDesc->mFormat = outputDesc->mFormat;
+                        dupOutputDesc->mChannels = outputDesc->mChannels;
+                        dupOutputDesc->mLatency = outputDesc->mLatency;
+                        mOutputs.add(mDuplicatedOutput, dupOutputDesc);
+                        applyStreamVolumes(mDuplicatedOutput, device);
+                    } else {
+                        LOGW("getOutput() could not open duplicated output for %d and %d",
+                                mHardwareOutput, mA2dpOutput);
+                        mAvailableOutputDevices &= ~device;
+                        delete outputDesc;
+                        return NO_INIT;
+                    }
+                } else {
+                    LOGW("setDeviceConnectionState() could not open A2DP output for device %x", device);
+                    mAvailableOutputDevices &= ~device;
+                    delete outputDesc;
+                    return NO_INIT;
+                }
+                AudioOutputDescriptor *hwOutputDesc = mOutputs.valueFor(mHardwareOutput);
+
+                if (mA2dpDeviceAddress == mScoDeviceAddress) {
+                    // It is normal to suspend twice if we are both in call,
+                    // and have the hardware audio output routed to BT SCO
+                    if (mPhoneState != AudioSystem::MODE_NORMAL) {
+                        mpClientInterface->suspendOutput(mA2dpOutput);
+                    }
+                    if (AudioSystem::isBluetoothScoDevice((AudioSystem::audio_devices)hwOutputDesc->device())) {
+                        mpClientInterface->suspendOutput(mA2dpOutput);
+                    }
+                }
+
+                // move streams pertaining to STRATEGY_MEDIA to the newly opened A2DP output
+                if (getDeviceForStrategy(STRATEGY_MEDIA) & device) {
+                    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                        if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_MEDIA) {
+                            mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mA2dpOutput);
+                            outputDesc->mRefCount[i] = hwOutputDesc->mRefCount[i];
+                            hwOutputDesc->mRefCount[i] = 0;
+                        }
+                    }
+
+                }
+                // move streams pertaining to STRATEGY_DTMF to the newly opened A2DP output
+                if (getDeviceForStrategy(STRATEGY_DTMF) & device) {
+                    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                        if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_DTMF) {
+                            mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mA2dpOutput);
+                            outputDesc->mRefCount[i] = hwOutputDesc->mRefCount[i];
+                            hwOutputDesc->mRefCount[i] = 0;
+                        }
+                    }
+
+                }
+                // move streams pertaining to STRATEGY_SONIFICATION to the newly opened duplicated output
+                if (getDeviceForStrategy(STRATEGY_SONIFICATION) & device) {
+                    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                        if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_SONIFICATION) {
+                            mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mDuplicatedOutput);
+                            outputDesc->mRefCount[i] =
+                                hwOutputDesc->mRefCount[i];
+                            mOutputs.valueFor(mDuplicatedOutput)->mRefCount[i] =
+                                hwOutputDesc->mRefCount[i];
+                        }
+                    }
+                }
+            } else
+#endif
+            // handle wired and SCO device connection (accessed via hardware output)
+            {
+
+                uint32_t newDevice = 0;
+                if (AudioSystem::isBluetoothScoDevice(device)) {
+                    LOGV("setDeviceConnectionState() BT SCO  device, address %s", device_address);
+                    // keep track of SCO device address
+                    mScoDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
+                    // if in call and connecting SCO device, check if we must reroute hardware output
+                    if (mPhoneState == AudioSystem::MODE_IN_CALL &&
+                        getDeviceForStrategy(STRATEGY_PHONE) == device) {
+                        newDevice = device;
+                    } else if (mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_DTMF) &&
+                               getDeviceForStrategy(STRATEGY_DTMF) == device) {
+                        newDevice = device;
+                    }
+                    if ((mA2dpDeviceAddress == mScoDeviceAddress) &&
+                        (mPhoneState != AudioSystem::MODE_NORMAL)) {
+                        mpClientInterface->suspendOutput(mA2dpOutput);
+                    }
+                } else if (device == AudioSystem::DEVICE_OUT_WIRED_HEADSET ||
+                           device == AudioSystem::DEVICE_OUT_WIRED_HEADPHONE) {
+                    LOGV("setDeviceConnectionState() wired headset device");
+                    // if connecting a wired headset, we check the following by order of priority
+                    // to request a routing change if necessary:
+                    // 1: we are in call or the strategy phone is active on the hardware output:
+                    //      use device for strategy phone
+                    // 2: the strategy sonification is active on the hardware output:
+                    //      use device for strategy sonification
+                    // 3: the strategy media is active on the hardware output:
+                    //      use device for strategy media
+                    // 4: the strategy DTMF is active on the hardware output:
+                    //      use device for strategy DTMF
+                    if (getDeviceForStrategy(STRATEGY_PHONE) == device &&
+                        (mPhoneState == AudioSystem::MODE_IN_CALL ||
+                        mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_PHONE))) {
+                        newDevice = device;
+                    } else if ((getDeviceForStrategy(STRATEGY_SONIFICATION) & device) &&
+                               mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_SONIFICATION)){
+                        newDevice = getDeviceForStrategy(STRATEGY_SONIFICATION);
+                    } else if ((getDeviceForStrategy(STRATEGY_MEDIA) == device) &&
+                               mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_MEDIA)){
+                        newDevice = device;
+                    } else if (getDeviceForStrategy(STRATEGY_DTMF) == device &&
+                            mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_DTMF)) {
+                         newDevice = device;
+                    }
+                }
+                // request routing change if necessary
+                setOutputDevice(mHardwareOutput, newDevice);
+            }
+            break;
+        // handle output device disconnection
+        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
+            if (!(mAvailableOutputDevices & device)) {
+                LOGW("setDeviceConnectionState() device not connected: %x", device);
+                return INVALID_OPERATION;
+            }
+
+            uint32_t newDevice = 0;
+            // get usage of disconnected device by all strategies
+            bool wasUsedForMedia = (getDeviceForStrategy(STRATEGY_MEDIA) & device) != 0;
+            bool wasUsedForSonification = (getDeviceForStrategy(STRATEGY_SONIFICATION) & device) != 0;
+            bool wasUsedforPhone = (getDeviceForStrategy(STRATEGY_PHONE) & device) != 0;
+            bool wasUsedforDtmf = (getDeviceForStrategy(STRATEGY_DTMF) & device) != 0;
+            LOGV("setDeviceConnectionState() disconnecting device %x used by media %d, sonification %d, phone %d",
+                    device, wasUsedForMedia, wasUsedForSonification, wasUsedforPhone);
+            // remove device from available output devices
+            mAvailableOutputDevices &= ~device;
+
+#ifdef WITH_A2DP
+            // handle A2DP device disconnection
+            if (AudioSystem::isA2dpDevice(device)) {
+                if (mA2dpOutput == 0 || mDuplicatedOutput == 0) {
+                    LOGW("setDeviceConnectionState() disconnecting A2DP and no A2DP output!");
+                    mAvailableOutputDevices |= device;
+                    return INVALID_OPERATION;
+                }
+
+                if (mA2dpDeviceAddress != device_address) {
+                    LOGW("setDeviceConnectionState() disconnecting unknow A2DP sink address %s", device_address);
+                    mAvailableOutputDevices |= device;
+                    return INVALID_OPERATION;
+                }
+
+                AudioOutputDescriptor *hwOutputDesc = mOutputs.valueFor(mHardwareOutput);
+                AudioOutputDescriptor *a2dpOutputDesc = mOutputs.valueFor(mA2dpOutput);
+
+                // mute media during 2 seconds to avoid outputing sound on hardware output while music stream
+                // is switched from A2DP output and before music is paused by music application
+                setStrategyMute(STRATEGY_MEDIA, true, mHardwareOutput);
+                setStrategyMute(STRATEGY_MEDIA, false, mHardwareOutput, 2000);
+
+                // If the A2DP device was used by DTMF strategy, move all streams pertaining to DTMF strategy to
+                // hardware output
+                if (wasUsedforDtmf) {
+                    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                        if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_DTMF) {
+                            mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mHardwareOutput);
+                            hwOutputDesc->changeRefCount((AudioSystem::stream_type)i,
+                                    a2dpOutputDesc->mRefCount[i]);
+                        }
+                    }
+                    if (a2dpOutputDesc->isUsedByStrategy(STRATEGY_DTMF)) {
+                        newDevice = getDeviceForStrategy(STRATEGY_DTMF);
+                    }
+                }
+
+                // If the A2DP device was used by media strategy, move all streams pertaining to media strategy to
+                // hardware output
+                if (wasUsedForMedia) {
+                    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                        if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_MEDIA) {
+                            mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mHardwareOutput);
+                            hwOutputDesc->changeRefCount((AudioSystem::stream_type)i,
+                                    a2dpOutputDesc->mRefCount[i]);
+                        }
+                    }
+                    if (a2dpOutputDesc->isUsedByStrategy(STRATEGY_MEDIA)) {
+                        newDevice = getDeviceForStrategy(STRATEGY_MEDIA);
+                    }
+                }
+
+                // If the A2DP device was used by sonification strategy, move all streams pertaining to
+                // sonification strategy to hardware output.
+                // Note that newDevice is overwritten here giving sonification strategy a higher priority than
+                // media strategy.
+                if (wasUsedForSonification) {
+                    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                        if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_SONIFICATION) {
+                            mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mHardwareOutput);
+                        }
+                    }
+                    if (a2dpOutputDesc->isUsedByStrategy(STRATEGY_SONIFICATION)) {
+                        newDevice = getDeviceForStrategy(STRATEGY_SONIFICATION);
+                    }
+                }
+
+                // close A2DP and duplicated outputs
+                AudioParameter param;
+                param.add(String8("closing"), String8("true"));
+                mpClientInterface->setParameters(mA2dpOutput, param.toString());
+
+                LOGW("setDeviceConnectionState() closing A2DP and duplicated output!");
+                mpClientInterface->closeOutput(mDuplicatedOutput);
+                delete mOutputs.valueFor(mDuplicatedOutput);
+                mOutputs.removeItem(mDuplicatedOutput);
+                mDuplicatedOutput = 0;
+                mpClientInterface->closeOutput(mA2dpOutput);
+                delete mOutputs.valueFor(mA2dpOutput);
+                mOutputs.removeItem(mA2dpOutput);
+                mA2dpOutput = 0;
+            } else
+#endif
+            {
+                if (AudioSystem::isBluetoothScoDevice(device)) {
+                    // handle SCO device disconnection
+                    if (wasUsedforPhone &&
+                        mPhoneState == AudioSystem::MODE_IN_CALL) {
+                        // if in call, find new suitable device for phone strategy
+                        newDevice = getDeviceForStrategy(STRATEGY_PHONE);
+                    } else if (wasUsedforDtmf &&
+                               mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_DTMF)) {
+                        newDevice = getDeviceForStrategy(STRATEGY_DTMF);
+                    }
+                    if ((mA2dpDeviceAddress == mScoDeviceAddress) &&
+                        (mPhoneState != AudioSystem::MODE_NORMAL)) {
+                        mpClientInterface->restoreOutput(mA2dpOutput);
+                    }
+                } else if (device == AudioSystem::DEVICE_OUT_WIRED_HEADSET ||
+                           device == AudioSystem::DEVICE_OUT_WIRED_HEADPHONE) {
+                    // if disconnecting a wired headset, we check the following by order of priority
+                    // to request a routing change if necessary:
+                    // 1: we are in call or the strategy phone is active on the hardware output:
+                    //      use device for strategy phone
+                    // 2: the strategy sonification is active on the hardware output:
+                    //      use device for strategy sonification
+                    // 3: the strategy media is active on the hardware output:
+                    //      use device for strategy media
+                    // 4: the strategy DTMF is active on the hardware output:
+                    //      use device for strategy DTMF
+                    if (wasUsedforPhone &&
+                        (mPhoneState == AudioSystem::MODE_IN_CALL ||
+                         mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_PHONE))) {
+                        newDevice = getDeviceForStrategy(STRATEGY_PHONE);
+                    } else if (wasUsedForSonification &&
+                               mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_SONIFICATION)){
+                        newDevice = getDeviceForStrategy(STRATEGY_SONIFICATION);
+                    } else if (wasUsedForMedia &&
+                               mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_MEDIA)){
+                        newDevice = getDeviceForStrategy(STRATEGY_MEDIA);
+                    } else if (wasUsedforDtmf &&
+                               mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_DTMF)){
+                        newDevice = getDeviceForStrategy(STRATEGY_DTMF);
+                    }
+                }
+            }
+            // request routing change if necessary
+            setOutputDevice(mHardwareOutput, newDevice);
+
+            // clear A2DP and SCO device address if necessary
+#ifdef WITH_A2DP
+            if (AudioSystem::isA2dpDevice(device)) {
+                mA2dpDeviceAddress = "";
+            }
+#endif
+            if (AudioSystem::isBluetoothScoDevice(device)) {
+                mScoDeviceAddress = "";
+            }
+            } break;
+
+        default:
+            LOGE("setDeviceConnectionState() invalid state: %x", state);
+            return BAD_VALUE;
+        }
+
+        if (device == AudioSystem::DEVICE_OUT_WIRED_HEADSET) {
+            device = AudioSystem::DEVICE_IN_WIRED_HEADSET;
+        } else if (device == AudioSystem::DEVICE_OUT_BLUETOOTH_SCO ||
+                   device == AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET ||
+                   device == AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT) {
+            device = AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET;
+        } else {
+            return NO_ERROR;
+        }
+    }
+    // handle input devices
+    if (AudioSystem::isInputDevice(device)) {
+
+        switch (state)
+        {
+        // handle input device connection
+        case AudioSystem::DEVICE_STATE_AVAILABLE: {
+            if (mAvailableInputDevices & device) {
+                LOGW("setDeviceConnectionState() device already connected: %d", device);
+                return INVALID_OPERATION;
+            }
+            mAvailableInputDevices |= device;
+            }
+            break;
+
+        // handle input device disconnection
+        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
+            if (!(mAvailableInputDevices & device)) {
+                LOGW("setDeviceConnectionState() device not connected: %d", device);
+                return INVALID_OPERATION;
+            }
+            mAvailableInputDevices &= ~device;
+            } break;
+
+        default:
+            LOGE("setDeviceConnectionState() invalid state: %x", state);
+            return BAD_VALUE;
+        }
+
+        audio_io_handle_t activeInput = getActiveInput();
+        if (activeInput != 0) {
+            AudioInputDescriptor *inputDesc = mInputs.valueFor(activeInput);
+            uint32_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
+            if (newDevice != inputDesc->mDevice) {
+                LOGV("setDeviceConnectionState() changing device from %x to %x for input %d",
+                        inputDesc->mDevice, newDevice, activeInput);
+                inputDesc->mDevice = newDevice;
+                AudioParameter param = AudioParameter();
+                param.addInt(String8(AudioParameter::keyRouting), (int)newDevice);
+                mpClientInterface->setParameters(activeInput, param.toString());
+            }
+        }
+
+        return NO_ERROR;
+    }
+
+    LOGW("setDeviceConnectionState() invalid device: %x", device);
+    return BAD_VALUE;
+}
+
+AudioSystem::device_connection_state AudioPolicyManager::getDeviceConnectionState(AudioSystem::audio_devices device,
+                                                  const char *device_address)
+{
+    AudioSystem::device_connection_state state = AudioSystem::DEVICE_STATE_UNAVAILABLE;
+    String8 address = String8(device_address);
+    if (AudioSystem::isOutputDevice(device)) {
+        if (device & mAvailableOutputDevices) {
+#ifdef WITH_A2DP
+            if (AudioSystem::isA2dpDevice(device) &&
+                address != "" && mA2dpDeviceAddress != address) {
+                return state;
+            }
+#endif
+            if (AudioSystem::isBluetoothScoDevice(device) &&
+                address != "" && mScoDeviceAddress != address) {
+                return state;
+            }
+            state = AudioSystem::DEVICE_STATE_AVAILABLE;
+        }
+    } else if (AudioSystem::isInputDevice(device)) {
+        if (device & mAvailableInputDevices) {
+            state = AudioSystem::DEVICE_STATE_AVAILABLE;
+        }
+    }
+
+    return state;
+}
+
+void AudioPolicyManager::setPhoneState(int state)
+{
+    LOGV("setPhoneState() state %d", state);
+    uint32_t newDevice = 0;
+    if (state < 0 || state >= AudioSystem::NUM_MODES) {
+        LOGW("setPhoneState() invalid state %d", state);
+        return;
+    }
+
+    if (state == mPhoneState ) {
+        LOGW("setPhoneState() setting same state %d", state);
+        return;
+    }
+
+    // if leaving call state, handle special case of active streams
+    // pertaining to sonification strategy see handleIncallSonification()
+    if (mPhoneState == AudioSystem::MODE_IN_CALL) {
+        LOGV("setPhoneState() in call state management: new state is %d", state);
+        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
+            handleIncallSonification(stream, false, true);
+        }
+    }
+
+    // store previous phone state for management of sonification strategy below
+    int oldState = mPhoneState;
+    uint32_t oldDtmfDevice = getDeviceForStrategy(STRATEGY_DTMF);
+    uint32_t oldSonificationDevice = getDeviceForStrategy(STRATEGY_SONIFICATION) & ~AudioSystem::DEVICE_OUT_SPEAKER;
+    mPhoneState = state;
+    bool force = false;
+    AudioOutputDescriptor *hwOutputDesc = mOutputs.valueFor(mHardwareOutput);
+    // check if a routing change is required for hardware output in the following
+    // order of priority:
+    // 1: a stream pertaining to sonification strategy is active
+    // 2: new state is incall
+    // 3: a stream pertaining to media strategy is active
+    // 4: a stream pertaining to DTMF strategy is active
+    if (hwOutputDesc->isUsedByStrategy(STRATEGY_SONIFICATION)) {
+        newDevice = getDeviceForStrategy(STRATEGY_SONIFICATION);
+    } else if (mPhoneState == AudioSystem::MODE_IN_CALL) {
+        newDevice = getDeviceForStrategy(STRATEGY_PHONE);
+        // force routing command to audio hardware when starting call
+        // even if no device change is needed
+        force = true;
+    } else if (hwOutputDesc->isUsedByStrategy(STRATEGY_MEDIA)) {
+        newDevice = getDeviceForStrategy(STRATEGY_MEDIA);
+    } else if (hwOutputDesc->isUsedByStrategy(STRATEGY_DTMF)) {
+        newDevice = getDeviceForStrategy(STRATEGY_DTMF);
+    }
+
+
+    if (mA2dpOutput != 0) {
+        // If entering or exiting in call state, switch DTMF streams to/from A2DP output
+        // if necessary
+        uint32_t newDtmfDevice = getDeviceForStrategy(STRATEGY_DTMF);
+        uint32_t newSonificationDevice = getDeviceForStrategy(STRATEGY_SONIFICATION) & ~AudioSystem::DEVICE_OUT_SPEAKER;
+        if (state == AudioSystem::MODE_IN_CALL) {  // entering in call mode
+            // move DTMF streams from A2DP output to hardware output if necessary
+            if (AudioSystem::isA2dpDevice((AudioSystem::audio_devices)oldDtmfDevice) &&
+                !AudioSystem::isA2dpDevice((AudioSystem::audio_devices)newDtmfDevice)) {
+                for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                    if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_DTMF) {
+                        mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mHardwareOutput);
+                        int refCount = mOutputs.valueFor(mA2dpOutput)->mRefCount[i];
+                        hwOutputDesc->changeRefCount((AudioSystem::stream_type)i,
+                                refCount);
+                        mOutputs.valueFor(mA2dpOutput)->changeRefCount((AudioSystem::stream_type)i,-refCount);
+                    }
+                }
+                if (newDevice == 0 && mOutputs.valueFor(mA2dpOutput)->isUsedByStrategy(STRATEGY_DTMF)) {
+                    newDevice = newDtmfDevice;
+                }
+            }
+            // move SONIFICATION streams from duplicated output to hardware output if necessary
+            if (AudioSystem::isA2dpDevice((AudioSystem::audio_devices)oldSonificationDevice) &&
+                !AudioSystem::isA2dpDevice((AudioSystem::audio_devices)newSonificationDevice)) {
+                for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                    if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_SONIFICATION) {
+                        mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mHardwareOutput);
+                        int refCount = mOutputs.valueFor(mDuplicatedOutput)->mRefCount[i];
+                        hwOutputDesc->changeRefCount((AudioSystem::stream_type)i,
+                                refCount);
+                        mOutputs.valueFor(mDuplicatedOutput)->changeRefCount((AudioSystem::stream_type)i,-refCount);
+                    }
+                }
+            }
+        } else {  // exiting in call mode
+            // move DTMF streams from hardware output to A2DP output if necessary
+            if (!AudioSystem::isA2dpDevice((AudioSystem::audio_devices)oldDtmfDevice) &&
+                AudioSystem::isA2dpDevice((AudioSystem::audio_devices)newDtmfDevice)) {
+                for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                    if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_DTMF) {
+                        mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mA2dpOutput);
+                        int refCount = hwOutputDesc->mRefCount[i];
+                        mOutputs.valueFor(mA2dpOutput)->changeRefCount((AudioSystem::stream_type)i, refCount);
+                        hwOutputDesc->changeRefCount((AudioSystem::stream_type)i, -refCount);
+                    }
+                }
+            }
+            // move SONIFICATION streams from hardware output to A2DP output if necessary
+            if (!AudioSystem::isA2dpDevice((AudioSystem::audio_devices)oldSonificationDevice) &&
+                AudioSystem::isA2dpDevice((AudioSystem::audio_devices)newSonificationDevice)) {
+                for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+                    if (getStrategy((AudioSystem::stream_type)i) == STRATEGY_SONIFICATION) {
+                        mpClientInterface->setStreamOutput((AudioSystem::stream_type)i, mDuplicatedOutput);
+                        int refCount = hwOutputDesc->mRefCount[i];
+                        mOutputs.valueFor(mDuplicatedOutput)->changeRefCount((AudioSystem::stream_type)i, refCount);
+                        hwOutputDesc->changeRefCount((AudioSystem::stream_type)i, -refCount);
+                    }
+                }
+            }
+        }
+        // suspend A2DP output if SCO device address is the same as A2DP device address.
+        // no need to check that a SCO device is actually connected as mScoDeviceAddress == ""
+        // if none is connected and the test below will fail.
+        if (mA2dpDeviceAddress == mScoDeviceAddress) {
+            if (oldState == AudioSystem::MODE_NORMAL) {
+                mpClientInterface->suspendOutput(mA2dpOutput);
+            } else if (state == AudioSystem::MODE_NORMAL) {
+                mpClientInterface->restoreOutput(mA2dpOutput);
+            }
+        }
+    }
+
+    // force routing command to audio hardware when ending call
+    // even if no device change is needed
+    if (oldState == AudioSystem::MODE_IN_CALL) {
+        if (newDevice == 0) {
+            newDevice = hwOutputDesc->device();
+        }
+        force = true;
+    }
+    // change routing is necessary
+    setOutputDevice(mHardwareOutput, newDevice, force);
+
+    // if entering in call state, handle special case of active streams
+    // pertaining to sonification strategy see handleIncallSonification()
+    if (state == AudioSystem::MODE_IN_CALL) {
+        LOGV("setPhoneState() in call state management: new state is %d", state);
+        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
+            handleIncallSonification(stream, true, true);
+        }
+    }
+
+    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
+    if (state == AudioSystem::MODE_RINGTONE &&
+        (hwOutputDesc->isUsedByStream(AudioSystem::MUSIC) ||
+        (systemTime() - mMusicStopTime) < seconds(SONIFICATION_HEADSET_MUSIC_DELAY))) {
+        mLimitRingtoneVolume = true;
+    } else {
+        mLimitRingtoneVolume = false;
+    }
+}
+
+void AudioPolicyManager::setRingerMode(uint32_t mode, uint32_t mask)
+{
+    LOGV("setRingerMode() mode %x, mask %x", mode, mask);
+
+    mRingerMode = mode;
+}
+
+void AudioPolicyManager::setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config)
+{
+    LOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
+
+    switch(usage) {
+    case AudioSystem::FOR_COMMUNICATION:
+        if (config != AudioSystem::FORCE_SPEAKER && config != AudioSystem::FORCE_BT_SCO &&
+            config != AudioSystem::FORCE_NONE) {
+            LOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
+            return;
+        }
+        mForceUse[usage] = config;
+        // update hardware output routing immediately if in call, or if there is an active
+        // VOICE_CALL stream, as would be the case with an application that uses this stream
+        // for it to behave like in a telephony app (e.g. voicemail app that plays audio files
+        // streamed or downloaded to the device)
+        if ((mPhoneState == AudioSystem::MODE_IN_CALL) ||
+                (mOutputs.valueFor(mHardwareOutput)->isUsedByStream(AudioSystem::VOICE_CALL))) {
+            uint32_t device = getDeviceForStrategy(STRATEGY_PHONE);
+            setOutputDevice(mHardwareOutput, device);
+        }
+        break;
+    case AudioSystem::FOR_MEDIA:
+        if (config != AudioSystem::FORCE_HEADPHONES && config != AudioSystem::FORCE_BT_A2DP &&
+            config != AudioSystem::FORCE_WIRED_ACCESSORY && config != AudioSystem::FORCE_NONE) {
+            LOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
+            return;
+        }
+        mForceUse[usage] = config;
+        break;
+    case AudioSystem::FOR_RECORD:
+        if (config != AudioSystem::FORCE_BT_SCO && config != AudioSystem::FORCE_WIRED_ACCESSORY &&
+            config != AudioSystem::FORCE_NONE) {
+            LOGW("setForceUse() invalid config %d for FOR_RECORD", config);
+            return;
+        }
+        mForceUse[usage] = config;
+        break;
+    case AudioSystem::FOR_DOCK:
+        if (config != AudioSystem::FORCE_NONE && config != AudioSystem::FORCE_BT_CAR_DOCK &&
+            config != AudioSystem::FORCE_BT_DESK_DOCK && config != AudioSystem::FORCE_WIRED_ACCESSORY) {
+            LOGW("setForceUse() invalid config %d for FOR_DOCK", config);
+        }
+        mForceUse[usage] = config;
+        break;
+    default:
+        LOGW("setForceUse() invalid usage %d", usage);
+        break;
+    }
+}
+
+AudioSystem::forced_config AudioPolicyManager::getForceUse(AudioSystem::force_use usage)
+{
+    return mForceUse[usage];
+}
+
+void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
+{
+    LOGV("setSystemProperty() property %s, value %s", property, value);
+    if (strcmp(property, "ro.camera.sound.forced") == 0) {
+        if (atoi(value)) {
+            LOGV("ENFORCED_AUDIBLE cannot be muted");
+            mStreams[AudioSystem::ENFORCED_AUDIBLE].mCanBeMuted = false;
+        } else {
+            LOGV("ENFORCED_AUDIBLE can be muted");
+            mStreams[AudioSystem::ENFORCED_AUDIBLE].mCanBeMuted = true;
+        }
+    }
+}
+
+audio_io_handle_t AudioPolicyManager::getOutput(AudioSystem::stream_type stream,
+                                    uint32_t samplingRate,
+                                    uint32_t format,
+                                    uint32_t channels,
+                                    AudioSystem::output_flags flags)
+{
+    audio_io_handle_t output = 0;
+    uint32_t latency = 0;
+    routing_strategy strategy = getStrategy((AudioSystem::stream_type)stream);
+    uint32_t device = getDeviceForStrategy(strategy);
+    LOGV("getOutput() stream %d, samplingRate %d, format %d, channels %x, flags %x", stream, samplingRate, format, channels, flags);
+
+
+    // open a direct output if:
+    // 1 a direct output is explicitely requested
+    // 2 the audio format is compressed
+    if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) ||
+         (format !=0 && !AudioSystem::isLinearPCM(format))) {
+
+        LOGV("getOutput() opening direct output device %x", device);
+        AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor();
+        outputDesc->mDevice = device;
+        outputDesc->mSamplingRate = samplingRate;
+        outputDesc->mFormat = format;
+        outputDesc->mChannels = channels;
+        outputDesc->mLatency = 0;
+        outputDesc->mFlags = (AudioSystem::output_flags)(flags | AudioSystem::OUTPUT_FLAG_DIRECT);
+        outputDesc->mRefCount[stream] = 1;
+        output = mpClientInterface->openOutput(&outputDesc->mDevice,
+                                        &outputDesc->mSamplingRate,
+                                        &outputDesc->mFormat,
+                                        &outputDesc->mChannels,
+                                        &outputDesc->mLatency,
+                                        outputDesc->mFlags);
+
+        // only accept an output with the requeted parameters
+        if ((samplingRate != 0 && samplingRate != outputDesc->mSamplingRate) ||
+            (format != 0 && format != outputDesc->mFormat) ||
+            (channels != 0 && channels != outputDesc->mChannels)) {
+            LOGV("getOutput() failed opening direct output: samplingRate %d, format %d, channels %d",
+                    samplingRate, format, channels);
+            mpClientInterface->closeOutput(output);
+            delete outputDesc;
+            return 0;
+        }
+        mOutputs.add(output, outputDesc);
+        return output;
+    }
+
+    if (channels != 0 && channels != AudioSystem::CHANNEL_OUT_MONO &&
+        channels != AudioSystem::CHANNEL_OUT_STEREO) {
+        return 0;
+    }
+    // open a non direct output
+
+    // get which output is suitable for the specified stream. The actual routing change will happen
+    // when startOutput() will be called
+    uint32_t device2 = device & ~AudioSystem::DEVICE_OUT_SPEAKER;
+    if (AudioSystem::popCount((AudioSystem::audio_devices)device) == 2) {
+#ifdef WITH_A2DP
+        if (AudioSystem::isA2dpDevice((AudioSystem::audio_devices)device2)) {
+            // if playing on 2 devices among which one is A2DP, use duplicated output
+            LOGV("getOutput() using duplicated output");
+            LOGW_IF((mA2dpOutput == 0), "getOutput() A2DP device in multiple %x selected but A2DP output not opened", device);
+            output = mDuplicatedOutput;
+        } else
+#endif
+        {
+            // if playing on 2 devices among which none is A2DP, use hardware output
+            output = mHardwareOutput;
+        }
+        LOGV("getOutput() using output %d for 2 devices %x", output, device);
+    } else {
+#ifdef WITH_A2DP
+        if (AudioSystem::isA2dpDevice((AudioSystem::audio_devices)device2)) {
+            // if playing on A2DP device, use a2dp output
+            LOGW_IF((mA2dpOutput == 0), "getOutput() A2DP device %x selected but A2DP output not opened", device);
+            output = mA2dpOutput;
+        } else
+#endif
+        {
+            // if playing on not A2DP device, use hardware output
+            output = mHardwareOutput;
+        }
+    }
+
+
+    LOGW_IF((output ==0), "getOutput() could not find output for stream %d, samplingRate %d, format %d, channels %x, flags %x",
+                stream, samplingRate, format, channels, flags);
+
+    return output;
+}
+
+status_t AudioPolicyManager::startOutput(audio_io_handle_t output, AudioSystem::stream_type stream,int session)
+{
+    LOGV("startOutput() output %d, stream %d", output, stream);
+    ssize_t index = mOutputs.indexOfKey(output);
+    if (index < 0) {
+        LOGW("startOutput() unknow output %d", output);
+        return BAD_VALUE;
+    }
+
+    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
+    routing_strategy strategy = getStrategy((AudioSystem::stream_type)stream);
+    uint32_t device = getDeviceForStrategy(strategy);
+
+    if (!outputDesc->isUsedByStrategy(strategy)) {
+        // if the stream started is the first active stream in its strategy, check if routing change
+        // must be done on hardware output
+        uint32_t newDevice = 0;
+        if (AudioSystem::popCount((AudioSystem::audio_devices)device) == 2) {
+#ifdef WITH_A2DP
+            uint32_t device2 = device & ~AudioSystem::DEVICE_OUT_SPEAKER;
+            if (AudioSystem::isA2dpDevice((AudioSystem::audio_devices)device2)) {
+                // if one device is A2DP, selected the second device for hardware output
+                device &= ~device2;
+            } else
+#endif
+            {
+                // we only support speaker + headset and speaker + headphone combinations on hardware output.
+                // other combinations will leave device = 0 and no routing will happen.
+                if (device != (AudioSystem::DEVICE_OUT_SPEAKER | AudioSystem::DEVICE_OUT_WIRED_HEADSET) &&
+                    device != (AudioSystem::DEVICE_OUT_SPEAKER | AudioSystem::DEVICE_OUT_WIRED_HEADPHONE)) {
+                    device = AudioSystem::DEVICE_OUT_SPEAKER;
+                }
+            }
+        }
+
+        // By order of priority
+        // 1 apply routing for phone strategy in any case
+        // 2 apply routing for notification strategy if no stream pertaining to
+        //   phone strategies is playing
+        // 3 apply routing for media strategy is not incall and neither phone nor sonification
+        //   strategies is active.
+        // 4 apply routing for DTMF strategy if no stream pertaining to
+        //   neither phone, sonification nor media strategy is playing
+        if (strategy == STRATEGY_PHONE) {
+            newDevice = device;
+        } else if (!mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_PHONE)) {
+            if (strategy == STRATEGY_SONIFICATION) {
+                newDevice = device;
+            } else if (!mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_SONIFICATION)) {
+                if (strategy == STRATEGY_MEDIA) {
+                    newDevice = device;
+                } else if (!mOutputs.valueFor(mHardwareOutput)->isUsedByStrategy(STRATEGY_MEDIA)) {
+                    // strategy == STRATEGY_DTMF
+                    newDevice = device;
+                }
+            }
+        }
+
+        // TODO: maybe mute stream is selected device was refused
+        setOutputDevice(mHardwareOutput, newDevice);
+    }
+
+    // incremenent usage count for this stream on the requested output:
+    // NOTE that the usage count is the same for duplicated output and hardware output which is
+    // necassary for a correct control of hardware output routing by startOutput() and stopOutput()
+    outputDesc->changeRefCount(stream, 1);
+
+    // handle special case for sonification while in call
+    if (mPhoneState == AudioSystem::MODE_IN_CALL) {
+        handleIncallSonification(stream, true, false);
+    }
+
+    // apply volume rules for current stream and device if necessary
+    checkAndSetVolume(stream, mStreams[stream].mIndexCur, output, outputDesc->device());
+
+    return NO_ERROR;
+}
+
+status_t AudioPolicyManager::stopOutput(audio_io_handle_t output, AudioSystem::stream_type stream,int session)
+{
+    LOGV("stopOutput() output %d, stream %d", output, stream);
+    ssize_t index = mOutputs.indexOfKey(output);
+    if (index < 0) {
+        LOGW("stopOutput() unknow output %d", output);
+        return BAD_VALUE;
+    }
+
+    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
+    routing_strategy strategy = getStrategy((AudioSystem::stream_type)stream);
+
+    // handle special case for sonification while in call
+    if (mPhoneState == AudioSystem::MODE_IN_CALL) {
+        handleIncallSonification(stream, false, false);
+    }
+
+    if (outputDesc->isUsedByStrategy(strategy)) {
+        // decrement usage count of this stream on the output
+        outputDesc->changeRefCount(stream, -1);
+        if (!outputDesc->isUsedByStrategy(strategy)) {
+            // if the stream is the last of its strategy to use this output, change routing
+            // in the following order or priority:
+            // PHONE > SONIFICATION > MEDIA > DTMF
+            uint32_t newDevice = 0;
+            if (outputDesc->isUsedByStrategy(STRATEGY_PHONE)) {
+                newDevice = getDeviceForStrategy(STRATEGY_PHONE);
+            } else if (outputDesc->isUsedByStrategy(STRATEGY_SONIFICATION)) {
+                newDevice = getDeviceForStrategy(STRATEGY_SONIFICATION);
+            } else if (mPhoneState == AudioSystem::MODE_IN_CALL) {
+                newDevice = getDeviceForStrategy(STRATEGY_PHONE);
+            } else if (outputDesc->isUsedByStrategy(STRATEGY_MEDIA)) {
+                newDevice = getDeviceForStrategy(STRATEGY_MEDIA);
+            } else if (outputDesc->isUsedByStrategy(STRATEGY_DTMF)) {
+                newDevice = getDeviceForStrategy(STRATEGY_DTMF);
+            }
+
+            // apply routing change if necessary.
+            // insert a delay of 2 times the audio hardware latency to ensure PCM
+            // buffers in audio flinger and audio hardware are emptied before the
+            // routing change is executed.
+            setOutputDevice(mHardwareOutput, newDevice, false, mOutputs.valueFor(mHardwareOutput)->mLatency*2);
+        }
+        // store time at which the last music track was stopped - see computeVolume()
+        if (stream == AudioSystem::MUSIC) {
+            mMusicStopTime = systemTime();
+        }
+        return NO_ERROR;
+    } else {
+        LOGW("stopOutput() refcount is already 0 for output %d", output);
+        return INVALID_OPERATION;
+    }
+}
+
+void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
+{
+    LOGV("releaseOutput() %d", output);
+    ssize_t index = mOutputs.indexOfKey(output);
+    if (index < 0) {
+        LOGW("releaseOutput() releasing unknown output %d", output);
+        return;
+    }
+    if (mOutputs.valueAt(index)->mFlags & AudioSystem::OUTPUT_FLAG_DIRECT) {
+        mpClientInterface->closeOutput(output);
+        delete mOutputs.valueAt(index);
+        mOutputs.removeItem(output);
+    }
+}
+
+audio_io_handle_t AudioPolicyManager::getInput(int inputSource,
+                                    uint32_t samplingRate,
+                                    uint32_t format,
+                                    uint32_t channels,
+                                    AudioSystem::audio_in_acoustics acoustics)
+{
+    audio_io_handle_t input = 0;
+    uint32_t device = getDeviceForInputSource(inputSource);
+
+    LOGV("getInput() inputSource %d, samplingRate %d, format %d, channels %x, acoustics %x", inputSource, samplingRate, format, channels, acoustics);
+
+    if (device == 0) {
+        return 0;
+    }
+
+    // adapt channel selection to input source
+    switch(inputSource) {
+    case AUDIO_SOURCE_VOICE_UPLINK:
+        channels = AudioSystem::CHANNEL_IN_VOICE_UPLINK;
+        break;
+    case AUDIO_SOURCE_VOICE_DOWNLINK:
+        channels = AudioSystem::CHANNEL_IN_VOICE_DNLINK;
+        break;
+    case AUDIO_SOURCE_VOICE_CALL:
+        channels = (AudioSystem::CHANNEL_IN_VOICE_UPLINK | AudioSystem::CHANNEL_IN_VOICE_DNLINK);
+        break;
+    default:
+        break;
+    }
+
+    AudioInputDescriptor *inputDesc = new AudioInputDescriptor();
+
+    inputDesc->mInputSource = inputSource;
+    inputDesc->mDevice = device;
+    inputDesc->mSamplingRate = samplingRate;
+    inputDesc->mFormat = format;
+    inputDesc->mChannels = channels;
+    inputDesc->mAcoustics = acoustics;
+    inputDesc->mRefCount = 0;
+    input = mpClientInterface->openInput(&inputDesc->mDevice,
+                                    &inputDesc->mSamplingRate,
+                                    &inputDesc->mFormat,
+                                    &inputDesc->mChannels,
+                                    inputDesc->mAcoustics);
+
+    // only accept input with the exact requested set of parameters
+    if ((samplingRate != inputDesc->mSamplingRate) ||
+        (format != inputDesc->mFormat) ||
+        (channels != inputDesc->mChannels)) {
+        LOGV("getOutput() failed opening input: samplingRate %d, format %d, channels %d",
+                samplingRate, format, channels);
+        mpClientInterface->closeInput(input);
+        delete inputDesc;
+        return 0;
+    }
+    mInputs.add(input, inputDesc);
+    return input;
+}
+
+status_t AudioPolicyManager::startInput(audio_io_handle_t input)
+{
+    LOGV("startInput() input %d", input);
+    ssize_t index = mInputs.indexOfKey(input);
+    if (index < 0) {
+        LOGW("startInput() unknow input %d", input);
+        return BAD_VALUE;
+    }
+    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
+
+    // refuse 2 active AudioRecord clients at the same time
+    if (getActiveInput() != 0) {
+        LOGW("startInput() input %d failed: other input already started", input);
+        return INVALID_OPERATION;
+    }
+
+    AudioParameter param = AudioParameter();
+    param.addInt(String8(AudioParameter::keyRouting), (int)inputDesc->mDevice);
+    mpClientInterface->setParameters(input, param.toString());
+
+    inputDesc->mRefCount = 1;
+    return NO_ERROR;
+}
+
+status_t AudioPolicyManager::stopInput(audio_io_handle_t input)
+{
+    LOGV("stopInput() input %d", input);
+    ssize_t index = mInputs.indexOfKey(input);
+    if (index < 0) {
+        LOGW("stopInput() unknow input %d", input);
+        return BAD_VALUE;
+    }
+    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
+
+    if (inputDesc->mRefCount == 0) {
+        LOGW("stopInput() input %d already stopped", input);
+        return INVALID_OPERATION;
+    } else {
+        AudioParameter param = AudioParameter();
+        param.addInt(String8(AudioParameter::keyRouting), 0);
+        mpClientInterface->setParameters(input, param.toString());
+        inputDesc->mRefCount = 0;
+        return NO_ERROR;
+    }
+}
+
+void AudioPolicyManager::releaseInput(audio_io_handle_t input)
+{
+    LOGV("releaseInput() %d", input);
+    ssize_t index = mInputs.indexOfKey(input);
+    if (index < 0) {
+        LOGW("releaseInput() releasing unknown input %d", input);
+        return;
+    }
+    mpClientInterface->closeInput(input);
+    delete mInputs.valueAt(index);
+    mInputs.removeItem(input);
+    LOGV("releaseInput() exit");
+}
+
+
+
+void AudioPolicyManager::initStreamVolume(AudioSystem::stream_type stream,
+                                            int indexMin,
+                                            int indexMax)
+{
+    LOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
+    if (indexMin < 0 || indexMin >= indexMax) {
+        LOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
+        return;
+    }
+    mStreams[stream].mIndexMin = indexMin;
+    mStreams[stream].mIndexMax = indexMax;
+}
+
+status_t AudioPolicyManager::setStreamVolumeIndex(AudioSystem::stream_type stream, int index)
+{
+
+    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
+        return BAD_VALUE;
+    }
+
+    // Force max volume if stream cannot be muted
+    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
+
+    LOGV("setStreamVolumeIndex() stream %d, index %d", stream, index);
+    mStreams[stream].mIndexCur = index;
+
+    // compute and apply stream volume on all outputs according to connected device
+    status_t status = NO_ERROR;
+    for (size_t i = 0; i < mOutputs.size(); i++) {
+        status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), mOutputs.valueAt(i)->device());
+        if (volStatus != NO_ERROR) {
+            status = volStatus;
+        }
+    }
+    return status;
+}
+
+status_t AudioPolicyManager::getStreamVolumeIndex(AudioSystem::stream_type stream, int *index)
+{
+    if (index == 0) {
+        return BAD_VALUE;
+    }
+    LOGV("getStreamVolumeIndex() stream %d", stream);
+    *index =  mStreams[stream].mIndexCur;
+    return NO_ERROR;
+}
+
+status_t AudioPolicyManager::dump(int fd)
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+
+    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Hardware Output: %d\n", mHardwareOutput);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " A2DP Output: %d\n", mA2dpOutput);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Duplicated Output: %d\n", mDuplicatedOutput);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Output devices: %08x\n", mAvailableOutputDevices);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Input devices: %08x\n", mAvailableInputDevices);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " A2DP device address: %s\n", mA2dpDeviceAddress.string());
+    result.append(buffer);
+    snprintf(buffer, SIZE, " SCO device address: %s\n", mScoDeviceAddress.string());
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Ringer mode: %d\n", mRingerMode);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Force use for communications %d\n", mForceUse[AudioSystem::FOR_COMMUNICATION]);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AudioSystem::FOR_MEDIA]);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AudioSystem::FOR_RECORD]);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AudioSystem::FOR_DOCK]);
+    result.append(buffer);
+    write(fd, result.string(), result.size());
+
+    snprintf(buffer, SIZE, "\nOutputs dump:\n");
+    write(fd, buffer, strlen(buffer));
+    for (size_t i = 0; i < mOutputs.size(); i++) {
+        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
+        write(fd, buffer, strlen(buffer));
+        mOutputs.valueAt(i)->dump(fd);
+    }
+
+    snprintf(buffer, SIZE, "\nInputs dump:\n");
+    write(fd, buffer, strlen(buffer));
+    for (size_t i = 0; i < mInputs.size(); i++) {
+        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
+        write(fd, buffer, strlen(buffer));
+        mInputs.valueAt(i)->dump(fd);
+    }
+
+    snprintf(buffer, SIZE, "\nStreams dump:\n");
+    write(fd, buffer, strlen(buffer));
+    snprintf(buffer, SIZE, " Stream  Index Min  Index Max  Index Cur  Mute Count  Can be muted\n");
+    write(fd, buffer, strlen(buffer));
+    for (size_t i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
+        snprintf(buffer, SIZE, " %02d", i);
+        mStreams[i].dump(buffer + 3, SIZE);
+        write(fd, buffer, strlen(buffer));
+    }
+
+    return NO_ERROR;
+}
+
+// ----------------------------------------------------------------------------
+// AudioPolicyManager
+// ----------------------------------------------------------------------------
+
+// ---  class factory
+
+
+extern "C" AudioPolicyInterface* createAudioPolicyManager(AudioPolicyClientInterface *clientInterface)
+{
+    return new AudioPolicyManager(clientInterface);
+}
+
+extern "C" void destroyAudioPolicyManager(AudioPolicyInterface *interface)
+{
+    delete interface;
+}
+
+AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
+: mPhoneState(AudioSystem::MODE_NORMAL), mRingerMode(0), mMusicStopTime(0), mLimitRingtoneVolume(false),mTotalEffectsCpuLoad(0),mTotalEffectsMemory(0)
+{
+    mpClientInterface = clientInterface;
+
+    for (int i = 0; i < AudioSystem::NUM_FORCE_USE; i++) {
+        mForceUse[i] = AudioSystem::FORCE_NONE;
+    }
+
+    // devices available by default are speaker, ear piece and microphone
+    mAvailableOutputDevices = AudioSystem::DEVICE_OUT_EARPIECE |
+                        AudioSystem::DEVICE_OUT_SPEAKER;
+    mAvailableInputDevices = AudioSystem::DEVICE_IN_BUILTIN_MIC;
+
+    mA2dpDeviceAddress = String8("");
+    mScoDeviceAddress = String8("");
+
+    // open hardware output
+    AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor();
+    outputDesc->mDevice = (uint32_t)AudioSystem::DEVICE_OUT_SPEAKER;
+    mHardwareOutput = mpClientInterface->openOutput(&outputDesc->mDevice,
+                                    &outputDesc->mSamplingRate,
+                                    &outputDesc->mFormat,
+                                    &outputDesc->mChannels,
+                                    &outputDesc->mLatency,
+                                    outputDesc->mFlags);
+
+    if (mHardwareOutput == 0) {
+        LOGE("Failed to initialize hardware output stream, samplingRate: %d, format %d, channels %d",
+                outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannels);
+    } else {
+        mOutputs.add(mHardwareOutput, outputDesc);
+        setOutputDevice(mHardwareOutput, (uint32_t)AudioSystem::DEVICE_OUT_SPEAKER, true);
+    }
+
+    mA2dpOutput = 0;
+    mDuplicatedOutput = 0;
+}
+
+AudioPolicyManager::~AudioPolicyManager()
+{
+   for (size_t i = 0; i < mOutputs.size(); i++) {
+        mpClientInterface->closeOutput(mOutputs.keyAt(i));
+        delete mOutputs.valueAt(i);
+   }
+   mOutputs.clear();
+   for (size_t i = 0; i < mInputs.size(); i++) {
+        mpClientInterface->closeInput(mInputs.keyAt(i));
+        delete mInputs.valueAt(i);
+   }
+   mInputs.clear();
+}
+
+// ---
+
+audio_io_handle_t AudioPolicyManager::getOutputForDevice(uint32_t device)
+{
+    audio_io_handle_t output = 0;
+    uint32_t lDevice;
+
+    for (size_t i = 0; i < mOutputs.size(); i++) {
+        lDevice = mOutputs.valueAt(i)->device();
+        LOGV("getOutputForDevice() output %d devices %x", mOutputs.keyAt(i), lDevice);
+
+        // We are only considering outputs connected to a mixer here => exclude direct outputs
+        if ((lDevice == device) &&
+           !(mOutputs.valueAt(i)->mFlags & AudioSystem::OUTPUT_FLAG_DIRECT)) {
+            output = mOutputs.keyAt(i);
+            LOGV("getOutputForDevice() found output %d for device %x", output, device);
+            break;
+        }
+    }
+    return output;
+}
+
+AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(AudioSystem::stream_type stream)
+{
+    // stream to strategy mapping
+    switch (stream) {
+    case AudioSystem::VOICE_CALL:
+    case AudioSystem::BLUETOOTH_SCO:
+        return STRATEGY_PHONE;
+    case AudioSystem::RING:
+    case AudioSystem::NOTIFICATION:
+    case AudioSystem::ALARM:
+    case AudioSystem::ENFORCED_AUDIBLE:
+        return STRATEGY_SONIFICATION;
+    case AudioSystem::DTMF:
+        return STRATEGY_DTMF;
+    default:
+        LOGE("unknown stream type");
+    case AudioSystem::SYSTEM:
+        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
+        // while key clicks are played produces a poor result
+    case AudioSystem::TTS:
+    case AudioSystem::MUSIC:
+        return STRATEGY_MEDIA;
+    }
+}
+
+uint32_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy)
+{
+    uint32_t device = 0;
+
+    switch (strategy) {
+    case STRATEGY_DTMF:
+        if (mPhoneState != AudioSystem::MODE_IN_CALL) {
+            // when off call, DTMF strategy follows the same rules as MEDIA strategy
+            device = getDeviceForStrategy(STRATEGY_MEDIA);
+            break;
+        }
+        // when in call, DTMF and PHONE strategies follow the same rules
+        // FALL THROUGH
+
+    case STRATEGY_PHONE:
+        // for phone strategy, we first consider the forced use and then the available devices by order
+        // of priority
+        switch (mForceUse[AudioSystem::FOR_COMMUNICATION]) {
+        case AudioSystem::FORCE_BT_SCO:
+            if (mPhoneState != AudioSystem::MODE_IN_CALL || strategy != STRATEGY_DTMF) {
+                device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
+                if (device) break;
+            }
+            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
+            if (device) break;
+            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_SCO;
+            if (device) break;
+            // if SCO device is requested but no SCO device is available, fall back to default case
+            // FALL THROUGH
+
+        default:    // FORCE_NONE
+            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADPHONE;
+            if (device) break;
+            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADSET;
+            if (device) break;
+            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_EARPIECE;
+            if (device == 0) {
+                LOGE("getDeviceForStrategy() earpiece device not found");
+            }
+            break;
+
+        case AudioSystem::FORCE_SPEAKER:
+            if (mPhoneState != AudioSystem::MODE_IN_CALL || strategy != STRATEGY_DTMF) {
+                device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
+                if (device) break;
+            }
+            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_SPEAKER;
+            if (device == 0) {
+                LOGE("getDeviceForStrategy() speaker device not found");
+            }
+            break;
+        }
+    break;
+
+    case STRATEGY_SONIFICATION:
+
+        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
+        // handleIncallSonification().
+        if (mPhoneState == AudioSystem::MODE_IN_CALL) {
+            device = getDeviceForStrategy(STRATEGY_PHONE);
+            break;
+        }
+        device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_SPEAKER;
+        if (device == 0) {
+            LOGE("getDeviceForStrategy() speaker device not found");
+        }
+        // The second device used for sonification is the same as the device used by media strategy
+        // FALL THROUGH
+
+    case STRATEGY_MEDIA: {
+        uint32_t device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_AUX_DIGITAL;
+        if (device2 == 0) {
+            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP;
+            if (device2 == 0) {
+                device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
+                if (device2 == 0) {
+                    device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
+                    if (device2 == 0) {
+                        device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADPHONE;
+                        if (device2 == 0) {
+                            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADSET;
+                            if (device2 == 0) {
+                                device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_SPEAKER;
+                                if (device == 0) {
+                                    LOGE("getDeviceForStrategy() speaker device not found");
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION, 0 otherwise
+        device |= device2;
+        // Do not play media stream if in call and the requested device would change the hardware
+        // output routing
+        if (mPhoneState == AudioSystem::MODE_IN_CALL &&
+            !AudioSystem::isA2dpDevice((AudioSystem::audio_devices)device) &&
+            device != getDeviceForStrategy(STRATEGY_PHONE)) {
+            device = 0;
+            LOGV("getDeviceForStrategy() incompatible media and phone devices");
+        }
+        } break;
+
+    default:
+        LOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
+        break;
+    }
+
+    LOGV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
+    return device;
+}
+
+void AudioPolicyManager::setOutputDevice(audio_io_handle_t output, uint32_t device, bool force, int delayMs)
+{
+    LOGV("setOutputDevice() output %d device %x delayMs %d", output, device, delayMs);
+    if (mOutputs.indexOfKey(output) < 0) {
+        LOGW("setOutputDevice() unknown output %d", output);
+        return;
+    }
+#ifdef WITH_A2DP
+    if (output == mHardwareOutput) {
+        // clear A2DP devices from device bit field here so that the caller does not have to
+        // do it in case of multiple device selections
+        uint32_t device2 = device & ~AudioSystem::DEVICE_OUT_SPEAKER;
+        if (AudioSystem::isA2dpDevice((AudioSystem::audio_devices)device2)) {
+            LOGV("setOutputDevice() removing A2DP device");
+            device &= ~device2;
+        }
+    } else if (output == mA2dpOutput) {
+        // clear hardware devices from device bit field here so that the caller does not have to
+        // do it in case of multiple device selections (the second device is always DEVICE_OUT_SPEAKER)
+        // in this case
+        device &= ~AudioSystem::DEVICE_OUT_SPEAKER;
+    }
+#endif
+
+    // doing this check here allows the caller to call setOutputDevice() without conditions
+    if (device == 0) return;
+
+    uint32_t oldDevice = (uint32_t)mOutputs.valueFor(output)->device();
+    // Do not change the routing if the requested device is the same as current device. Doing this check
+    // here allows the caller to call setOutputDevice() without conditions
+    if (device == oldDevice && !force) {
+        LOGV("setOutputDevice() setting same device %x for output %d", device, output);
+        return;
+    }
+
+    mOutputs.valueFor(output)->mDevice = device;
+    // mute media streams if both speaker and headset are selected
+    if (device == (AudioSystem::DEVICE_OUT_SPEAKER | AudioSystem::DEVICE_OUT_WIRED_HEADSET) ||
+        device == (AudioSystem::DEVICE_OUT_SPEAKER | AudioSystem::DEVICE_OUT_WIRED_HEADPHONE)) {
+        setStrategyMute(STRATEGY_MEDIA, true, output);
+        // wait for the PCM output buffers to empty before proceeding with the rest of the command
+        usleep(mOutputs.valueFor(output)->mLatency*2*1000);
+    }
+    // suspend A2D output if SCO device is selected
+    if (AudioSystem::isBluetoothScoDevice((AudioSystem::audio_devices)device)) {
+         if (mA2dpOutput && mScoDeviceAddress == mA2dpDeviceAddress) {
+             mpClientInterface->suspendOutput(mA2dpOutput);
+         }
+    }
+    // do the routing
+    AudioParameter param = AudioParameter();
+    param.addInt(String8(AudioParameter::keyRouting), (int)device);
+    mpClientInterface->setParameters(mHardwareOutput, param.toString(), delayMs);
+    // update stream volumes according to new device
+    applyStreamVolumes(output, device, delayMs);
+
+    // if disconnecting SCO device, restore A2DP output
+    if (AudioSystem::isBluetoothScoDevice((AudioSystem::audio_devices)oldDevice)) {
+         if (mA2dpOutput && mScoDeviceAddress == mA2dpDeviceAddress) {
+             LOGV("restore A2DP output");
+             mpClientInterface->restoreOutput(mA2dpOutput);
+         }
+    }
+    // if changing from a combined headset + speaker route, unmute media streams
+    if (oldDevice == (AudioSystem::DEVICE_OUT_SPEAKER | AudioSystem::DEVICE_OUT_WIRED_HEADSET) ||
+        oldDevice == (AudioSystem::DEVICE_OUT_SPEAKER | AudioSystem::DEVICE_OUT_WIRED_HEADPHONE)) {
+        setStrategyMute(STRATEGY_MEDIA, false, output, delayMs);
+    }
+}
+
+uint32_t AudioPolicyManager::getDeviceForInputSource(int inputSource)
+{
+    uint32_t device;
+
+    switch(inputSource) {
+    case AUDIO_SOURCE_DEFAULT:
+    case AUDIO_SOURCE_MIC:
+    case AUDIO_SOURCE_VOICE_RECOGNITION:
+        if (mForceUse[AudioSystem::FOR_RECORD] == AudioSystem::FORCE_BT_SCO &&
+            mAvailableInputDevices & AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
+            device = AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET;
+        } else if (mAvailableInputDevices & AudioSystem::DEVICE_IN_WIRED_HEADSET) {
+            device = AudioSystem::DEVICE_IN_WIRED_HEADSET;
+        } else {
+            device = AudioSystem::DEVICE_IN_BUILTIN_MIC;
+        }
+        break;
+    case AUDIO_SOURCE_CAMCORDER:
+        device = AudioSystem::DEVICE_IN_BUILTIN_MIC;
+        break;
+    case AUDIO_SOURCE_VOICE_UPLINK:
+    case AUDIO_SOURCE_VOICE_DOWNLINK:
+    case AUDIO_SOURCE_VOICE_CALL:
+        device = AudioSystem::DEVICE_IN_VOICE_CALL;
+        break;
+    default:
+        LOGW("getInput() invalid input source %d", inputSource);
+        device = 0;
+        break;
+    }
+    return device;
+}
+
+audio_io_handle_t AudioPolicyManager::getActiveInput()
+{
+    for (size_t i = 0; i < mInputs.size(); i++) {
+        if (mInputs.valueAt(i)->mRefCount > 0) {
+            return mInputs.keyAt(i);
+        }
+    }
+    return 0;
+}
+
+float AudioPolicyManager::computeVolume(int stream, int index, audio_io_handle_t output, uint32_t device)
+{
+    float volume = 1.0;
+    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
+    StreamDescriptor &streamDesc = mStreams[stream];
+
+    if (device == 0) {
+        device = outputDesc->device();
+    }
+
+    int volInt = (100 * (index - streamDesc.mIndexMin)) / (streamDesc.mIndexMax - streamDesc.mIndexMin);
+    volume = AudioSystem::linearToLog(volInt);
+
+    // if a heaset is connected, apply the following rules to ring tones and notifications
+    // to avoid sound level bursts in user's ears:
+    // - always attenuate ring tones and notifications volume by 6dB
+    // - if music is playing, always limit the volume to current music volume,
+    // with a minimum threshold at -36dB so that notification is always perceived.
+    if ((device &
+        (AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP |
+        AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
+        AudioSystem::DEVICE_OUT_WIRED_HEADSET |
+        AudioSystem::DEVICE_OUT_WIRED_HEADPHONE)) &&
+        (getStrategy((AudioSystem::stream_type)stream) == STRATEGY_SONIFICATION)) {
+        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
+        // when the phone is ringing we must consider that music could have been paused just before
+        // by the music application and behave as if music was active if the last music track was
+        // just stopped
+        if (outputDesc->isUsedByStream(AudioSystem::MUSIC) || mLimitRingtoneVolume) {
+            float musicVol = computeVolume(AudioSystem::MUSIC, mStreams[AudioSystem::MUSIC].mIndexCur, output, device);
+            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ? musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
+            if (volume > minVol) {
+                volume = minVol;
+                LOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
+            }
+        }
+    }
+
+    return volume;
+}
+
+status_t AudioPolicyManager::checkAndSetVolume(int stream, int index, audio_io_handle_t output, uint32_t device, int delayMs, bool force)
+{
+
+    // do not change actual stream volume if the stream is muted
+    if (mStreams[stream].mMuteCount != 0) {
+        LOGV("checkAndSetVolume() stream %d muted count %d", stream, mStreams[stream].mMuteCount);
+        return NO_ERROR;
+    }
+
+    // do not change in call volume if bluetooth is connected and vice versa
+    if ((stream == AudioSystem::VOICE_CALL && mForceUse[AudioSystem::FOR_COMMUNICATION] == AudioSystem::FORCE_BT_SCO) ||
+        (stream == AudioSystem::BLUETOOTH_SCO && mForceUse[AudioSystem::FOR_COMMUNICATION] != AudioSystem::FORCE_BT_SCO)) {
+        LOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
+             stream, mForceUse[AudioSystem::FOR_COMMUNICATION]);
+        return INVALID_OPERATION;
+    }
+
+    float volume = computeVolume(stream, index, output, device);
+    // do not set volume if the float value did not change
+    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] || force) {
+        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
+        LOGV("setStreamVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
+        if (stream == AudioSystem::VOICE_CALL ||
+            stream == AudioSystem::DTMF ||
+            stream == AudioSystem::BLUETOOTH_SCO) {
+            float voiceVolume = -1.0;
+            // offset value to reflect actual hardware volume that never reaches 0
+            // 1% corresponds roughly to first step in VOICE_CALL stream volume setting (see AudioService.java)
+            volume = 0.01 + 0.99 * volume;
+            if (stream == AudioSystem::VOICE_CALL) {
+                voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
+            } else if (stream == AudioSystem::BLUETOOTH_SCO) {
+                voiceVolume = 1.0;
+            }
+            if (voiceVolume >= 0 && output == mHardwareOutput) {
+                mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
+            }
+        }
+        mpClientInterface->setStreamVolume((AudioSystem::stream_type)stream, volume, output, delayMs);
+    }
+
+    return NO_ERROR;
+}
+
+void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output, uint32_t device, int delayMs)
+{
+    LOGV("applyStreamVolumes() for output %d and device %x", output, device);
+
+    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
+        checkAndSetVolume(stream, mStreams[stream].mIndexCur, output, device, delayMs);
+    }
+}
+
+void AudioPolicyManager::setStrategyMute(routing_strategy strategy, bool on, audio_io_handle_t output, int delayMs)
+{
+    LOGV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
+    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
+        if (getStrategy((AudioSystem::stream_type)stream) == strategy) {
+            setStreamMute(stream, on, output, delayMs);
+        }
+    }
+}
+
+void AudioPolicyManager::setStreamMute(int stream, bool on, audio_io_handle_t output, int delayMs)
+{
+    StreamDescriptor &streamDesc = mStreams[stream];
+    uint32_t device = mOutputs.valueFor(output)->mDevice;
+
+    LOGV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d", stream, on, output, streamDesc.mMuteCount);
+
+    if (on) {
+        if (streamDesc.mMuteCount == 0) {
+            if (streamDesc.mCanBeMuted) {
+                checkAndSetVolume(stream, 0, output, device, delayMs);
+            }
+        }
+        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
+        streamDesc.mMuteCount++;
+    } else {
+        if (streamDesc.mMuteCount == 0) {
+            LOGW("setStreamMute() unmuting non muted stream!");
+            return;
+        }
+        if (--streamDesc.mMuteCount == 0) {
+            checkAndSetVolume(stream, streamDesc.mIndexCur, output, device, delayMs);
+        }
+    }
+}
+
+void AudioPolicyManager::handleIncallSonification(int stream, bool starting, bool stateChange)
+{
+    // if the stream pertains to sonification strategy and we are in call we must
+    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
+    // in the device used for phone strategy and play the tone if the selected device does not
+    // interfere with the device used for phone strategy
+    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
+    // many times as there are active tracks on the output
+
+    if (getStrategy((AudioSystem::stream_type)stream) == STRATEGY_SONIFICATION) {
+        AudioOutputDescriptor *outputDesc = mOutputs.valueFor(mHardwareOutput);
+        LOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
+                stream, starting, outputDesc->mDevice, stateChange);
+        if (outputDesc->isUsedByStream((AudioSystem::stream_type)stream)) {
+            int muteCount = 1;
+            if (stateChange) {
+                muteCount = outputDesc->mRefCount[stream];
+            }
+            if (AudioSystem::isLowVisibility((AudioSystem::stream_type)stream)) {
+                LOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
+                for (int i = 0; i < muteCount; i++) {
+                    setStreamMute(stream, starting, mHardwareOutput);
+                }
+            } else {
+                LOGV("handleIncallSonification() high visibility ");
+                if (outputDesc->mDevice & getDeviceForStrategy(STRATEGY_PHONE)) {
+                    LOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
+                    for (int i = 0; i < muteCount; i++) {
+                        setStreamMute(stream, starting, mHardwareOutput);
+                    }
+                }
+                if (starting) {
+                    mpClientInterface->startTone(ToneGenerator::TONE_SUP_CALL_WAITING, AudioSystem::VOICE_CALL);
+                } else {
+                    mpClientInterface->stopTone();
+                }
+            }
+        }
+    }
+}
+
+uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
+{
+//TODO ..newly added function in Gingerbread
+   LOGD("Inside.%s. Need implementation\n",__func__);
+   return 0;
+}
+
+uint32_t AudioPolicyManager::getMaxEffectsMemory()
+{
+//TODO ..newly added function in Gingerbread
+   LOGD("Inside.%s. Need implementation\n",__func__);
+   return 0;
+}
+
+
+uint32_t AudioPolicyManager::getStrategyForStream(AudioSystem::stream_type stream) 
+{
+//TODO ..newly added function in Gingerbread
+   LOGD("Inside.%s. Need implementation\n",__func__);
+   return 0;
+
+}
+
+audio_io_handle_t AudioPolicyManager::getOutputForEffect(effect_descriptor_t *desc) 
+{
+
+//TODO ..newly added function in Gingerbread
+   LOGD("Inside.%s. Need implementation\n",__func__);
+   return 0;
+
+}
+
+status_t AudioPolicyManager::registerEffect(effect_descriptor_t *desc,
+                                    audio_io_handle_t output,
+                                    uint32_t strategy,
+                                    int session,
+                                    int id) 
+{
+
+//TODO ..newly added function in Gingerbread
+   LOGD("Inside.%s. Need implementation\n",__func__);
+   return 0;
+}
+
+status_t AudioPolicyManager::unregisterEffect(int id) 
+{
+//TODO ..newly added function in Gingerbread
+   LOGD("Inside.%s. Need implementation\n",__func__);
+   return 0;
+}
+// --- AudioOutputDescriptor class implementation
+
+AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor()
+    : mSamplingRate(0), mFormat(0), mChannels(0), mLatency(0),
+    mFlags((AudioSystem::output_flags)0), mDevice(0), mOutput1(0), mOutput2(0)
+{
+    // clear usage count for all stream types
+    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
+        mRefCount[i] = 0;
+        mCurVolume[i] = -1.0;
+    }
+}
+
+uint32_t AudioPolicyManager::AudioOutputDescriptor::device()
+{
+    uint32_t device = 0;
+    if (isDuplicated()) {
+        device = mOutput1->mDevice | mOutput2->mDevice;
+    } else {
+        device = mDevice;
+    }
+    return device;
+}
+
+void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(AudioSystem::stream_type stream, int delta)
+{
+    // forward usage count change to attached outputs
+    if (isDuplicated()) {
+        mOutput1->changeRefCount(stream, delta);
+        mOutput2->changeRefCount(stream, delta);
+    }
+    if ((delta + (int)mRefCount[stream]) < 0) {
+        LOGW("changeRefCount() invalid delta %d for stream %d, refCount %d", delta, stream, mRefCount[stream]);
+        mRefCount[stream] = 0;
+        return;
+    }
+    mRefCount[stream] += delta;
+    LOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
+}
+
+bool AudioPolicyManager::AudioOutputDescriptor::isUsedByStrategy(routing_strategy strategy)
+{
+    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
+        if (AudioPolicyManager::getStrategy((AudioSystem::stream_type)i) == strategy &&
+            isUsedByStream((AudioSystem::stream_type)i)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+
+    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Channels: %08x\n", mChannels);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Stream volume refCount\n");
+    result.append(buffer);
+    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
+        snprintf(buffer, SIZE, " %02d     %.03f  %d\n", i, mCurVolume[i], mRefCount[i]);
+        result.append(buffer);
+    }
+    write(fd, result.string(), result.size());
+
+    return NO_ERROR;
+}
+
+// --- AudioInputDescriptor class implementation
+
+AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor()
+    : mSamplingRate(0), mFormat(0), mChannels(0),
+     mAcoustics((AudioSystem::audio_in_acoustics)0), mDevice(0), mRefCount(0)
+{
+}
+
+status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+
+    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Channels: %08x\n", mChannels);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Acoustics %08x\n", mAcoustics);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
+    result.append(buffer);
+    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
+    result.append(buffer);
+    write(fd, result.string(), result.size());
+
+    return NO_ERROR;
+}
+
+// --- StreamDescriptor class implementation
+
+void AudioPolicyManager::StreamDescriptor::dump(char* buffer, size_t size)
+{
+    snprintf(buffer, size, "      %02d         %02d         %02d         %02d          %d\n",
+            mIndexMin,
+            mIndexMax,
+            mIndexCur,
+            mMuteCount,
+            mCanBeMuted);
+}
+
+
+}; // namespace android