Merge "Plumb APM configuration retrieval from HAL"
diff --git a/media/audioaidlconversion/AidlConversionNdkCpp.cpp b/media/audioaidlconversion/AidlConversionNdkCpp.cpp
index 36f6128..c64a074 100644
--- a/media/audioaidlconversion/AidlConversionNdkCpp.cpp
+++ b/media/audioaidlconversion/AidlConversionNdkCpp.cpp
@@ -123,6 +123,7 @@
 GENERATE_CONVERTERS(android::media::audio::common, AudioHalEngineConfig);
 GENERATE_CONVERTERS(android::media::audio::common, AudioMMapPolicyInfo);
 GENERATE_ENUM_CONVERTERS(android::media::audio::common, AudioMMapPolicyType);
+GENERATE_ENUM_CONVERTERS(android::media::audio::common, AudioMode);
 GENERATE_CONVERTERS(android::media::audio::common, AudioPort);
 
 }  // namespace android
diff --git a/media/audioaidlconversion/include/media/AidlConversionNdkCpp.h b/media/audioaidlconversion/include/media/AidlConversionNdkCpp.h
index 09f1c22..f4822aa 100644
--- a/media/audioaidlconversion/include/media/AidlConversionNdkCpp.h
+++ b/media/audioaidlconversion/include/media/AidlConversionNdkCpp.h
@@ -23,11 +23,13 @@
 #include <aidl/android/media/audio/common/AudioHalEngineConfig.h>
 #include <aidl/android/media/audio/common/AudioMMapPolicyInfo.h>
 #include <aidl/android/media/audio/common/AudioMMapPolicyType.h>
+#include <aidl/android/media/audio/common/AudioMode.h>
 #include <aidl/android/media/audio/common/AudioPort.h>
 #include <android/media/audio/common/AudioFormatDescription.h>
 #include <android/media/audio/common/AudioHalEngineConfig.h>
 #include <android/media/audio/common/AudioMMapPolicyInfo.h>
 #include <android/media/audio/common/AudioMMapPolicyType.h>
+#include <android/media/audio/common/AudioMode.h>
 #include <android/media/audio/common/AudioPort.h>
 #include <media/AidlConversionUtil.h>
 
@@ -43,6 +45,7 @@
 DECLARE_CONVERTERS(android::media::audio::common, AudioHalEngineConfig);
 DECLARE_CONVERTERS(android::media::audio::common, AudioMMapPolicyInfo);
 DECLARE_CONVERTERS(android::media::audio::common, AudioMMapPolicyType);
+DECLARE_CONVERTERS(android::media::audio::common, AudioMode);
 DECLARE_CONVERTERS(android::media::audio::common, AudioPort);
 
 #undef DECLARE_CONVERTERS
diff --git a/media/libaudioclient/Android.bp b/media/libaudioclient/Android.bp
index dc7afdb..655605d 100644
--- a/media/libaudioclient/Android.bp
+++ b/media/libaudioclient/Android.bp
@@ -287,9 +287,11 @@
         "aidl/android/media/AudioFlag.aidl",
         "aidl/android/media/AudioGainSys.aidl",
         "aidl/android/media/AudioHalVersion.aidl",
+        "aidl/android/media/AudioHwModule.aidl",
         "aidl/android/media/AudioIoConfigEvent.aidl",
         "aidl/android/media/AudioIoDescriptor.aidl",
         "aidl/android/media/AudioPatchFw.aidl",
+        "aidl/android/media/AudioPolicyConfig.aidl",
         "aidl/android/media/AudioPortFw.aidl",
         "aidl/android/media/AudioPortSys.aidl",
         "aidl/android/media/AudioPortConfigFw.aidl",
diff --git a/media/libaudioclient/AudioSystem.cpp b/media/libaudioclient/AudioSystem.cpp
index 975d5d7..8d0369a 100644
--- a/media/libaudioclient/AudioSystem.cpp
+++ b/media/libaudioclient/AudioSystem.cpp
@@ -2480,6 +2480,14 @@
     return af->supportsBluetoothVariableLatency(support);
 }
 
+status_t AudioSystem::getAudioPolicyConfig(media::AudioPolicyConfig *config) {
+    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
+    if (af == nullptr) {
+        return PERMISSION_DENIED;
+    }
+    return af->getAudioPolicyConfig(config);
+}
+
 class CaptureStateListenerImpl : public media::BnCaptureStateListener,
                                  public IBinder::DeathRecipient {
 public:
diff --git a/media/libaudioclient/IAudioFlinger.cpp b/media/libaudioclient/IAudioFlinger.cpp
index 756597e..f5b4e1a 100644
--- a/media/libaudioclient/IAudioFlinger.cpp
+++ b/media/libaudioclient/IAudioFlinger.cpp
@@ -866,6 +866,16 @@
     return NO_ERROR;
 }
 
+status_t AudioFlingerClientAdapter::getAudioPolicyConfig(media::AudioPolicyConfig *config) {
+    if (config == nullptr) {
+        return BAD_VALUE;
+    }
+
+    RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(mDelegate->getAudioPolicyConfig(config)));
+
+    return NO_ERROR;
+}
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // AudioFlingerServerAdapter
 AudioFlingerServerAdapter::AudioFlingerServerAdapter(
@@ -1399,4 +1409,8 @@
     return Status::fromStatusT(mDelegate->supportsBluetoothVariableLatency(support));
 }
 
+Status AudioFlingerServerAdapter::getAudioPolicyConfig(media::AudioPolicyConfig* _aidl_return) {
+    return Status::fromStatusT(mDelegate->getAudioPolicyConfig(_aidl_return));
+}
+
 } // namespace android
diff --git a/media/libaudioclient/aidl/android/media/AudioHwModule.aidl b/media/libaudioclient/aidl/android/media/AudioHwModule.aidl
new file mode 100644
index 0000000..9251400
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/AudioHwModule.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+package android.media;
+
+import android.media.audio.common.AudioPort;
+import android.media.AudioRoute;
+
+/*
+ * A representation of a HAL module configuration.
+ * {@hide}
+ */
+parcelable AudioHwModule {
+    int /* audio_module_handle_t */ handle;
+    @utf8InCpp String name;
+    AudioPort[] ports;
+    AudioRoute[] routes;
+}
diff --git a/media/libaudioclient/aidl/android/media/AudioPolicyConfig.aidl b/media/libaudioclient/aidl/android/media/AudioPolicyConfig.aidl
new file mode 100644
index 0000000..87767c2
--- /dev/null
+++ b/media/libaudioclient/aidl/android/media/AudioPolicyConfig.aidl
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+package android.media;
+
+import android.media.AudioHwModule;
+import android.media.SurroundSoundConfig;
+import android.media.audio.common.AudioHalEngineConfig;
+import android.media.audio.common.AudioMode;
+
+/*
+ * Audio policy configuration. Functionally replaces the APM XML file.
+ * {@hide}
+ */
+parcelable AudioPolicyConfig {
+    AudioHwModule[] modules;
+    AudioMode[] supportedModes;
+    SurroundSoundConfig surroundSoundConfig;
+    AudioHalEngineConfig engineConfig;
+}
diff --git a/media/libaudioclient/aidl/android/media/IAudioFlingerService.aidl b/media/libaudioclient/aidl/android/media/IAudioFlingerService.aidl
index b722d14..1f4b3a9 100644
--- a/media/libaudioclient/aidl/android/media/IAudioFlingerService.aidl
+++ b/media/libaudioclient/aidl/android/media/IAudioFlingerService.aidl
@@ -17,6 +17,7 @@
 package android.media;
 
 import android.media.AudioPatchFw;
+import android.media.AudioPolicyConfig;
 import android.media.AudioPortFw;
 import android.media.AudioPortConfigFw;
 import android.media.AudioUniqueIdUse;
@@ -270,6 +271,12 @@
      */
     boolean isBluetoothVariableLatencyEnabled();
 
+    /**
+     * Only implemented for AIDL. Provides the APM configuration which
+     * used to be in the XML file.
+     */
+    AudioPolicyConfig getAudioPolicyConfig();
+
     // When adding a new method, please review and update
     // IAudioFlinger.h AudioFlingerServerAdapter::Delegate::TransactionCode
     // AudioFlinger.cpp AudioFlinger::onTransactWrapper()
diff --git a/media/libaudioclient/include/media/AudioSystem.h b/media/libaudioclient/include/media/AudioSystem.h
index 404558d..b36e4dd 100644
--- a/media/libaudioclient/include/media/AudioSystem.h
+++ b/media/libaudioclient/include/media/AudioSystem.h
@@ -23,6 +23,7 @@
 #include <vector>
 
 #include <android/content/AttributionSourceState.h>
+#include <android/media/AudioPolicyConfig.h>
 #include <android/media/AudioPortFw.h>
 #include <android/media/AudioVibratorInfo.h>
 #include <android/media/BnAudioFlingerClient.h>
@@ -592,6 +593,8 @@
 
     static status_t supportsBluetoothVariableLatency(bool *support);
 
+    static status_t getAudioPolicyConfig(media::AudioPolicyConfig *config);
+
     // A listener for capture state changes.
     class CaptureStateListener : public virtual RefBase {
     public:
diff --git a/media/libaudioclient/include/media/IAudioFlinger.h b/media/libaudioclient/include/media/IAudioFlinger.h
index c43769b..1064e59 100644
--- a/media/libaudioclient/include/media/IAudioFlinger.h
+++ b/media/libaudioclient/include/media/IAudioFlinger.h
@@ -374,6 +374,8 @@
     virtual status_t isBluetoothVariableLatencyEnabled(bool* enabled) = 0;
 
     virtual status_t supportsBluetoothVariableLatency(bool* support) = 0;
+
+    virtual status_t getAudioPolicyConfig(media::AudioPolicyConfig* output) = 0;
 };
 
 /**
@@ -485,6 +487,7 @@
     status_t setBluetoothVariableLatencyEnabled(bool enabled) override;
     status_t isBluetoothVariableLatencyEnabled(bool* enabled) override;
     status_t supportsBluetoothVariableLatency(bool* support) override;
+    status_t getAudioPolicyConfig(media::AudioPolicyConfig* output) override;
 
 private:
     const sp<media::IAudioFlingerService> mDelegate;
@@ -583,6 +586,8 @@
                     media::BnAudioFlingerService::TRANSACTION_isBluetoothVariableLatencyEnabled,
             SUPPORTS_BLUETOOTH_VARIABLE_LATENCY =
                     media::BnAudioFlingerService::TRANSACTION_supportsBluetoothVariableLatency,
+            GET_AUDIO_POLICY_CONFIG =
+                    media::BnAudioFlingerService::TRANSACTION_getAudioPolicyConfig,
         };
 
     protected:
@@ -713,6 +718,7 @@
     Status setBluetoothVariableLatencyEnabled(bool enabled) override;
     Status isBluetoothVariableLatencyEnabled(bool* enabled) override;
     Status supportsBluetoothVariableLatency(bool* support) override;
+    Status getAudioPolicyConfig(media::AudioPolicyConfig* _aidl_return) override;
 private:
     const sp<AudioFlingerServerAdapter::Delegate> mDelegate;
 };
diff --git a/media/libaudiohal/impl/DeviceHalAidl.cpp b/media/libaudiohal/impl/DeviceHalAidl.cpp
index e452a35..3079d91 100644
--- a/media/libaudiohal/impl/DeviceHalAidl.cpp
+++ b/media/libaudiohal/impl/DeviceHalAidl.cpp
@@ -107,8 +107,26 @@
     return cpp;
 }
 
+template<typename T>
+std::shared_ptr<T> retrieveSubInterface(const std::shared_ptr<IModule>& module,
+        ::ndk::ScopedAStatus (IModule::*getT)(std::shared_ptr<T>*)) {
+    if (module != nullptr) {
+        std::shared_ptr<T> instance;
+        if (auto status = (module.get()->*getT)(&instance); status.isOk()) {
+            return instance;
+        }
+    }
+    return nullptr;
+}
+
 }  // namespace
 
+DeviceHalAidl::DeviceHalAidl(const std::string& instance, const std::shared_ptr<IModule>& module)
+        : ConversionHelperAidl("DeviceHalAidl"),
+          mInstance(instance), mModule(module),
+          mTelephony(retrieveSubInterface<ITelephony>(module, &IModule::getTelephony)) {
+}
+
 status_t DeviceHalAidl::getAudioPorts(std::vector<media::audio::common::AudioPort> *ports) {
     auto convertAudioPortFromMap = [](const Ports::value_type& pair) {
         return ndk2cpp_AudioPort(pair.second);
@@ -124,6 +142,22 @@
     return OK;
 }
 
+status_t DeviceHalAidl::getSupportedModes(std::vector<media::audio::common::AudioMode> *modes) {
+    TIME_CHECK();
+    if (modes == nullptr) {
+        return BAD_VALUE;
+    }
+    if (mModule == nullptr) return NO_INIT;
+    if (mTelephony == nullptr) return INVALID_OPERATION;
+    std::vector<AudioMode> aidlModes;
+    RETURN_STATUS_IF_ERROR(
+            statusTFromBinderStatus(mTelephony->getSupportedAudioModes(&aidlModes)));
+    *modes = VALUE_OR_RETURN_STATUS(
+            ::aidl::android::convertContainer<std::vector<media::audio::common::AudioMode>>(
+                    aidlModes, ndk2cpp_AudioMode));
+    return OK;
+}
+
 status_t DeviceHalAidl::getSupportedDevices(uint32_t*) {
     // Obsolete.
     return INVALID_OPERATION;
@@ -175,17 +209,14 @@
 status_t DeviceHalAidl::setVoiceVolume(float volume) {
     TIME_CHECK();
     if (!mModule) return NO_INIT;
-    std::shared_ptr<ITelephony> telephony;
-    if (ndk::ScopedAStatus status = mModule->getTelephony(&telephony);
-            status.isOk() && telephony != nullptr) {
-        ITelephony::TelecomConfig inConfig{ .voiceVolume = Float{volume} }, outConfig;
-        RETURN_STATUS_IF_ERROR(
-                statusTFromBinderStatus(telephony->setTelecomConfig(inConfig, &outConfig)));
-        ALOGW_IF(outConfig.voiceVolume.has_value() && volume != outConfig.voiceVolume.value().value,
-                "%s: the resulting voice volume %f is not the same as requested %f",
-                __func__, outConfig.voiceVolume.value().value, volume);
-    }
-    return INVALID_OPERATION;
+    if (mTelephony == nullptr) return INVALID_OPERATION;
+    ITelephony::TelecomConfig inConfig{ .voiceVolume = Float{volume} }, outConfig;
+    RETURN_STATUS_IF_ERROR(
+            statusTFromBinderStatus(mTelephony->setTelecomConfig(inConfig, &outConfig)));
+    ALOGW_IF(outConfig.voiceVolume.has_value() && volume != outConfig.voiceVolume.value().value,
+            "%s: the resulting voice volume %f is not the same as requested %f",
+            __func__, outConfig.voiceVolume.value().value, volume);
+    return OK;
 }
 
 status_t DeviceHalAidl::setMasterVolume(float volume) {
@@ -204,10 +235,8 @@
     TIME_CHECK();
     if (!mModule) return NO_INIT;
     AudioMode audioMode = VALUE_OR_FATAL(::aidl::android::legacy2aidl_audio_mode_t_AudioMode(mode));
-    std::shared_ptr<ITelephony> telephony;
-    if (ndk::ScopedAStatus status = mModule->getTelephony(&telephony);
-            status.isOk() && telephony != nullptr) {
-        RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(telephony->switchAudioMode(audioMode)));
+    if (mTelephony != nullptr) {
+        RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(mTelephony->switchAudioMode(audioMode)));
     }
     return statusTFromBinderStatus(mModule->updateAudioMode(audioMode));
 }
diff --git a/media/libaudiohal/impl/DeviceHalAidl.h b/media/libaudiohal/impl/DeviceHalAidl.h
index ea3e125..7e1ee27 100644
--- a/media/libaudiohal/impl/DeviceHalAidl.h
+++ b/media/libaudiohal/impl/DeviceHalAidl.h
@@ -72,6 +72,8 @@
 
     status_t getAudioRoutes(std::vector<media::AudioRoute> *routes) override;
 
+    status_t getSupportedModes(std::vector<media::audio::common::AudioMode> *modes) override;
+
     // Sets the value of 'devices' to a bitmask of 1 or more values of audio_devices_t.
     status_t getSupportedDevices(uint32_t *devices) override;
 
@@ -197,8 +199,7 @@
     // Must not be constructed directly by clients.
     DeviceHalAidl(
             const std::string& instance,
-            const std::shared_ptr<::aidl::android::hardware::audio::core::IModule>& module)
-            : ConversionHelperAidl("DeviceHalAidl"), mInstance(instance), mModule(module) {}
+            const std::shared_ptr<::aidl::android::hardware::audio::core::IModule>& module);
 
     ~DeviceHalAidl() override = default;
 
@@ -282,6 +283,7 @@
 
     const std::string mInstance;
     const std::shared_ptr<::aidl::android::hardware::audio::core::IModule> mModule;
+    const std::shared_ptr<::aidl::android::hardware::audio::core::ITelephony> mTelephony;
     Ports mPorts;
     int32_t mDefaultInputPortId = -1;
     int32_t mDefaultOutputPortId = -1;
diff --git a/media/libaudiohal/impl/DeviceHalHidl.cpp b/media/libaudiohal/impl/DeviceHalHidl.cpp
index ad9e182..cd83171 100644
--- a/media/libaudiohal/impl/DeviceHalHidl.cpp
+++ b/media/libaudiohal/impl/DeviceHalHidl.cpp
@@ -88,6 +88,11 @@
     return INVALID_OPERATION;
 }
 
+status_t DeviceHalHidl::getSupportedModes(
+        std::vector<media::audio::common::AudioMode> *modes __unused) {
+    return INVALID_OPERATION;
+}
+
 status_t DeviceHalHidl::getSupportedDevices(uint32_t*) {
     // Obsolete.
     return INVALID_OPERATION;
diff --git a/media/libaudiohal/impl/DeviceHalHidl.h b/media/libaudiohal/impl/DeviceHalHidl.h
index 6b6c197..17acd2f 100644
--- a/media/libaudiohal/impl/DeviceHalHidl.h
+++ b/media/libaudiohal/impl/DeviceHalHidl.h
@@ -33,6 +33,8 @@
 
     status_t getAudioRoutes(std::vector<media::AudioRoute> *routes) override;
 
+    status_t getSupportedModes(std::vector<media::audio::common::AudioMode> *modes) override;
+
     // Sets the value of 'devices' to a bitmask of 1 or more values of audio_devices_t.
     status_t getSupportedDevices(uint32_t *devices) override;
 
diff --git a/media/libaudiohal/include/media/audiohal/DeviceHalInterface.h b/media/libaudiohal/include/media/audiohal/DeviceHalInterface.h
index b0f8656..0103680 100644
--- a/media/libaudiohal/include/media/audiohal/DeviceHalInterface.h
+++ b/media/libaudiohal/include/media/audiohal/DeviceHalInterface.h
@@ -19,6 +19,7 @@
 
 #include <android/media/audio/common/AudioMMapPolicyInfo.h>
 #include <android/media/audio/common/AudioMMapPolicyType.h>
+#include <android/media/audio/common/AudioMode.h>
 #include <android/media/audio/common/AudioPort.h>
 #include <android/media/AudioRoute.h>
 #include <error/Result.h>
@@ -40,6 +41,8 @@
 
     virtual status_t getAudioRoutes(std::vector<media::AudioRoute> *routes) = 0;
 
+    virtual status_t getSupportedModes(std::vector<media::audio::common::AudioMode> *modes) = 0;
+
     // Sets the value of 'devices' to a bitmask of 1 or more values of audio_devices_t.
     virtual status_t getSupportedDevices(uint32_t *devices) = 0;
 
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 0f5021b..edc3f60 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -111,6 +111,7 @@
 using media::IEffectClient;
 using media::audio::common::AudioMMapPolicyInfo;
 using media::audio::common::AudioMMapPolicyType;
+using media::audio::common::AudioMode;
 using android::content::AttributionSourceState;
 using android::detail::AudioHalVersionInfo;
 
@@ -235,6 +236,7 @@
 BINDER_METHOD_ENTRY(setBluetoothVariableLatencyEnabled) \
 BINDER_METHOD_ENTRY(isBluetoothVariableLatencyEnabled) \
 BINDER_METHOD_ENTRY(supportsBluetoothVariableLatency) \
+BINDER_METHOD_ENTRY(getAudioPolicyConfig) \
 
 // singleton for Binder Method Statistics for IAudioFlinger
 static auto& getIAudioFlingerStatistics() {
@@ -2538,6 +2540,47 @@
 
 // ----------------------------------------------------------------------------
 
+status_t AudioFlinger::getAudioPolicyConfig(media::AudioPolicyConfig *config)
+{
+    if (config == nullptr) {
+        return BAD_VALUE;
+    }
+    Mutex::Autolock _l(mLock);
+    AutoMutex lock(mHardwareLock);
+    RETURN_STATUS_IF_ERROR(
+            mDevicesFactoryHal->getSurroundSoundConfig(&config->surroundSoundConfig));
+    RETURN_STATUS_IF_ERROR(mDevicesFactoryHal->getEngineConfig(&config->engineConfig));
+    std::vector<std::string> hwModuleNames;
+    RETURN_STATUS_IF_ERROR(mDevicesFactoryHal->getDeviceNames(&hwModuleNames));
+    std::set<AudioMode> allSupportedModes;
+    for (const auto& name : hwModuleNames) {
+        AudioHwDevice* module = loadHwModule_l(name.c_str());
+        if (module == nullptr) continue;
+        media::AudioHwModule aidlModule;
+        if (module->hwDevice()->getAudioPorts(&aidlModule.ports) == OK &&
+                module->hwDevice()->getAudioRoutes(&aidlModule.routes) == OK) {
+            aidlModule.handle = module->handle();
+            aidlModule.name = module->moduleName();
+            config->modules.push_back(std::move(aidlModule));
+        }
+        std::vector<AudioMode> supportedModes;
+        if (module->hwDevice()->getSupportedModes(&supportedModes) == OK) {
+            allSupportedModes.insert(supportedModes.begin(), supportedModes.end());
+        }
+    }
+    if (!allSupportedModes.empty()) {
+        config->supportedModes.insert(config->supportedModes.end(),
+                allSupportedModes.begin(), allSupportedModes.end());
+    } else {
+        ALOGW("%s: The HAL does not provide telephony functionality", __func__);
+        config->supportedModes = { media::audio::common::AudioMode::NORMAL,
+            media::audio::common::AudioMode::RINGTONE,
+            media::audio::common::AudioMode::IN_CALL,
+            media::audio::common::AudioMode::IN_COMMUNICATION };
+    }
+    return OK;
+}
+
 audio_module_handle_t AudioFlinger::loadHwModule(const char *name)
 {
     if (name == NULL) {
@@ -2548,16 +2591,17 @@
     }
     Mutex::Autolock _l(mLock);
     AutoMutex lock(mHardwareLock);
-    return loadHwModule_l(name);
+    AudioHwDevice* module = loadHwModule_l(name);
+    return module != nullptr ? module->handle() : AUDIO_MODULE_HANDLE_NONE;
 }
 
 // loadHwModule_l() must be called with AudioFlinger::mLock and AudioFlinger::mHardwareLock held
-audio_module_handle_t AudioFlinger::loadHwModule_l(const char *name)
+AudioHwDevice* AudioFlinger::loadHwModule_l(const char *name)
 {
     for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
         if (strncmp(mAudioHwDevs.valueAt(i)->moduleName(), name, strlen(name)) == 0) {
             ALOGW("loadHwModule() module %s already loaded", name);
-            return mAudioHwDevs.keyAt(i);
+            return mAudioHwDevs.valueAt(i);
         }
     }
 
@@ -2566,7 +2610,7 @@
     int rc = mDevicesFactoryHal->openDevice(name, &dev);
     if (rc) {
         ALOGE("loadHwModule() error %d loading module %s", rc, name);
-        return AUDIO_MODULE_HANDLE_NONE;
+        return nullptr;
     }
 
     mHardwareStatus = AUDIO_HW_INIT;
@@ -2574,7 +2618,7 @@
     mHardwareStatus = AUDIO_HW_IDLE;
     if (rc) {
         ALOGE("loadHwModule() init check error %d for module %s", rc, name);
-        return AUDIO_MODULE_HANDLE_NONE;
+        return nullptr;
     }
 
     // Check and cache this HAL's level of support for master mute and master
@@ -2648,8 +2692,7 @@
 
     ALOGI("loadHwModule() Loaded %s audio interface, handle %d", name, handle);
 
-    return handle;
-
+    return audioDevice;
 }
 
 // ----------------------------------------------------------------------------
@@ -4648,6 +4691,7 @@
         case TransactionCode::SET_DEVICE_CONNECTED_STATE:
         case TransactionCode::SET_REQUESTED_LATENCY_MODE:
         case TransactionCode::GET_SUPPORTED_LATENCY_MODES:
+        case TransactionCode::GET_AUDIO_POLICY_CONFIG:
             ALOGW("%s: transaction %d received from PID %d",
                   __func__, code, IPCThreadState::self()->getCallingPid());
             // return status only for non void methods
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 998504d..159ed2f 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -309,6 +309,8 @@
 
     virtual status_t supportsBluetoothVariableLatency(bool* support);
 
+    virtual status_t getAudioPolicyConfig(media::AudioPolicyConfig* config);
+
     status_t onTransactWrapper(TransactionCode code, const Parcel& data, uint32_t flags,
         const std::function<status_t()>& delegate) override;
 
@@ -969,7 +971,7 @@
                 float       masterVolume_l() const;
                 float       getMasterBalance_l() const;
                 bool        masterMute_l() const;
-                audio_module_handle_t loadHwModule_l(const char *name);
+                AudioHwDevice* loadHwModule_l(const char *name);
 
                 Vector < sp<SyncEvent> > mPendingSyncEvents; // sync events awaiting for a session
                                                              // to be created
diff --git a/services/audiopolicy/AudioPolicyInterface.h b/services/audiopolicy/AudioPolicyInterface.h
index 0a9e6eb..fc63a3a 100644
--- a/services/audiopolicy/AudioPolicyInterface.h
+++ b/services/audiopolicy/AudioPolicyInterface.h
@@ -418,6 +418,8 @@
 public:
     virtual ~AudioPolicyClientInterface() {}
 
+    virtual status_t getAudioPolicyConfig(media::AudioPolicyConfig *config) = 0;
+
     //
     // Audio HW module functions
     //
diff --git a/services/audiopolicy/common/managerdefinitions/include/AudioPolicyConfig.h b/services/audiopolicy/common/managerdefinitions/include/AudioPolicyConfig.h
index b24fce8..32c78a1 100644
--- a/services/audiopolicy/common/managerdefinitions/include/AudioPolicyConfig.h
+++ b/services/audiopolicy/common/managerdefinitions/include/AudioPolicyConfig.h
@@ -44,6 +44,8 @@
 
     // The source used to indicate the default fallback configuration.
     static const constexpr char* const kDefaultConfigSource = "AudioPolicyConfig::setDefault";
+    // The suffix of the "engine default" implementation shared library name.
+    static const constexpr char* const kDefaultEngineLibraryNameSuffix = "default";
 
     // Creates the default (fallback) configuration.
     static sp<const AudioPolicyConfig> createDefault();
@@ -114,12 +116,6 @@
         mDefaultOutputDevice = defaultDevice;
     }
 
-    bool isSpeakerDrcEnabled() const { return mIsSpeakerDrcEnabled; }
-    void setSpeakerDrcEnabled(bool isSpeakerDrcEnabled)
-    {
-        mIsSpeakerDrcEnabled = isSpeakerDrcEnabled;
-    }
-
     bool isCallScreenModeSupported() const { return mIsCallScreenModeSupported; }
     void setCallScreenModeSupported(bool isCallScreenModeSupported)
     {
@@ -135,18 +131,12 @@
     {
         mSurroundFormats = surroundFormats;
     }
-    void setSurroundFormats(SurroundFormats &&surroundFormats)
-    {
-        mSurroundFormats = std::move(surroundFormats);
-    }
 
     void setDefault();
 
 private:
     friend class sp<AudioPolicyConfig>;
 
-    static const constexpr char* const kDefaultEngineLibraryNameSuffix = "default";
-
     AudioPolicyConfig() = default;
 
     void augmentData();
@@ -155,13 +145,9 @@
     std::string mSource;  // Not kDefaultConfigSource. Empty source means an empty config.
     std::string mEngineLibraryNameSuffix = kDefaultEngineLibraryNameSuffix;
     HwModuleCollection mHwModules; /**< Collection of Module, with Profiles, i.e. Mix Ports. */
-    DeviceVector mOutputDevices;
-    DeviceVector mInputDevices;
+    DeviceVector mOutputDevices;  // Attached output devices.
+    DeviceVector mInputDevices;   // Attached input devices.
     sp<DeviceDescriptor> mDefaultOutputDevice;
-    // TODO: remove when legacy conf file is removed. true on devices that use DRC on the
-    // DEVICE_CATEGORY_SPEAKER path to boost soft sounds, used to adjust volume curves accordingly.
-    // Note: remove also speaker_drc_enabled from global configuration of XML config file.
-    bool mIsSpeakerDrcEnabled = false;
     bool mIsCallScreenModeSupported = false;
     SurroundFormats mSurroundFormats;
 };
diff --git a/services/audiopolicy/common/managerdefinitions/src/AudioPolicyConfig.cpp b/services/audiopolicy/common/managerdefinitions/src/AudioPolicyConfig.cpp
index 575a6c5..42c76e2 100644
--- a/services/audiopolicy/common/managerdefinitions/src/AudioPolicyConfig.cpp
+++ b/services/audiopolicy/common/managerdefinitions/src/AudioPolicyConfig.cpp
@@ -41,9 +41,8 @@
     auto config = sp<AudioPolicyConfig>::make();
     if (status_t status = config->loadFromXml(filePath, false /*forVts*/); status == NO_ERROR) {
         return config;
-    } else {
-        return createDefault();
     }
+    return createDefault();
 }
 
 // static
diff --git a/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp b/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp
index 1b48dc3..3d5c1d2 100644
--- a/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp
+++ b/services/audiopolicy/common/managerdefinitions/src/Serializer.cpp
@@ -197,7 +197,6 @@
 
     struct Attributes
     {
-        static constexpr const char *speakerDrcEnabled = "speaker_drc_enabled";
         static constexpr const char *callScreenModeSupported= "call_screen_mode_supported";
         static constexpr const char *engineLibrarySuffix = "engine_library";
     };
@@ -770,12 +769,7 @@
     for (const xmlNode *cur = root->xmlChildrenNode; cur != NULL; cur = cur->next) {
         if (!xmlStrcmp(cur->name, reinterpret_cast<const xmlChar*>(GlobalConfigTraits::tag))) {
             bool value;
-            std::string attr = getXmlAttribute(cur, Attributes::speakerDrcEnabled);
-            if (!attr.empty() &&
-                    convertTo<std::string, bool>(attr, value)) {
-                config->setSpeakerDrcEnabled(value);
-            }
-            attr = getXmlAttribute(cur, Attributes::callScreenModeSupported);
+            std::string attr = getXmlAttribute(cur, Attributes::callScreenModeSupported);
             if (!attr.empty() &&
                     convertTo<std::string, bool>(attr, value)) {
                 config->setCallScreenModeSupported(value);
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 8154944..b7abef9 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -5705,10 +5705,14 @@
         if (std::find(mHwModules.begin(), mHwModules.end(), hwModule) != mHwModules.end()) {
             continue;
         }
-        hwModule->setHandle(mpClientInterface->loadHwModule(hwModule->getName()));
         if (hwModule->getHandle() == AUDIO_MODULE_HANDLE_NONE) {
-            ALOGW("could not open HW module %s", hwModule->getName());
-            continue;
+            if (audio_module_handle_t handle = mpClientInterface->loadHwModule(hwModule->getName());
+                    handle != AUDIO_MODULE_HANDLE_NONE) {
+                hwModule->setHandle(handle);
+            } else {
+                ALOGW("could not load HW module %s", hwModule->getName());
+                continue;
+            }
         }
         mHwModules.push_back(hwModule);
         // open all output streams needed to access attached devices.
diff --git a/services/audiopolicy/service/AudioPolicyClientImpl.cpp b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
index 4691135..290db97 100644
--- a/services/audiopolicy/service/AudioPolicyClientImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
@@ -27,6 +27,18 @@
 
 /* implementation of the client interface from the policy manager */
 
+status_t AudioPolicyService::AudioPolicyClient::getAudioPolicyConfig(
+        media::AudioPolicyConfig *config)
+{
+    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
+    if (af == 0) {
+        ALOGW("%s: could not get AudioFlinger", __func__);
+        return AUDIO_MODULE_HANDLE_NONE;
+    }
+
+    return af->getAudioPolicyConfig(config);
+}
+
 audio_module_handle_t AudioPolicyService::AudioPolicyClient::loadHwModule(const char *name)
 {
     sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
diff --git a/services/audiopolicy/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index 6a13303..45fb71c 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -707,6 +707,8 @@
         explicit AudioPolicyClient(AudioPolicyService *service) : mAudioPolicyService(service) {}
         virtual ~AudioPolicyClient() {}
 
+        virtual status_t getAudioPolicyConfig(media::AudioPolicyConfig *config);
+
         //
         // Audio HW module functions
         //
diff --git a/services/audiopolicy/tests/AudioPolicyTestClient.h b/services/audiopolicy/tests/AudioPolicyTestClient.h
index e81a3b5..b212a32 100644
--- a/services/audiopolicy/tests/AudioPolicyTestClient.h
+++ b/services/audiopolicy/tests/AudioPolicyTestClient.h
@@ -25,6 +25,9 @@
     virtual ~AudioPolicyTestClient() = default;
 
     // AudioPolicyClientInterface Implementation
+    status_t getAudioPolicyConfig(media::AudioPolicyConfig* /*config*/) override {
+        return INVALID_OPERATION;
+    }
     audio_module_handle_t loadHwModule(const char* /*name*/) override {
         return AUDIO_MODULE_HANDLE_NONE;
     }