flo/deb: Add custom audio service

Change-Id: I745a11fdf08fca981752164b393ae1da407989c4

audio_service/Android.bp

@@ -0,0 +1,33 @@
+//
+// Copyright (C) 2022 The LineageOS-UL Project
+// SPDX-License-Identifier: Apache-2.0
+//
+
+cc_binary {
+    name: "android.hardware.audio.service.nexus7",
+
+    init_rc: ["android.hardware.audio.service.nexus7.rc"],
+    relative_install_path: "hw",
+    vendor: true,
+
+    srcs: ["service.cpp"],
+
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+    ],
+
+    shared_libs: [
+        "libcutils",
+        "libbinder",
+        "libhidlbase",
+        "liblog",
+        "libutils",
+        "libhardware",
+    ],
+
+    defaults: [
+        "android_hardware_audio_config_defaults",
+    ],
+}

audio_service/android.hardware.audio.service.nexus7.rc

@@ -0,0 +1,9 @@
+service vendor.audio-hal /vendor/bin/hw/android.hardware.audio.service.nexus7
+    class hal
+    user audioserver
+    # media gid needed for /dev/fm (radio) and for /data/misc/media (tee)
+    group audio camera drmrpc inet media mediadrm net_bt net_bt_admin net_bw_acct wakelock context_hub
+    capabilities BLOCK_SUSPEND
+    ioprio rt 4
+    task_profiles ProcessCapacityHigh HighPerformance
+    onrestart restart audioserver

audio_service/service.cpp

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2016 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 "audiohalservice"
+
+#include <signal.h>
+#include <string>
+#include <vector>
+
+#include <binder/ProcessState.h>
+#include <cutils/properties.h>
+#include <hidl/HidlTransportSupport.h>
+#include <hidl/LegacySupport.h>
+#include <hwbinder/ProcessState.h>
+
+using namespace android::hardware;
+using android::OK;
+
+using InterfacesList = std::vector<std::string>;
+
+/** Try to register the provided factories in the provided order.
+ *  If any registers successfully, do not register any other and return true.
+ *  If all fail, return false.
+ */
+template <class Iter>
+static bool registerPassthroughServiceImplementations(Iter first, Iter last) {
+    for (; first != last; ++first) {
+        if (registerPassthroughServiceImplementation(*first) == OK) {
+            return true;
+        }
+    }
+    return false;
+}
+
+int main(int /* argc */, char* /* argv */ []) {
+    signal(SIGPIPE, SIG_IGN);
+
+    ::android::ProcessState::initWithDriver("/dev/vndbinder");
+    // start a threadpool for vndbinder interactions
+    ::android::ProcessState::self()->startThreadPool();
+
+    const int32_t defaultValue = -1;
+    int32_t value =
+        property_get_int32("persist.vendor.audio.service.hwbinder.size_kbyte", defaultValue);
+    if (value != defaultValue) {
+        ALOGD("Configuring hwbinder with mmap size %d KBytes", value);
+        ProcessState::initWithMmapSize(static_cast<size_t>(value) * 1024);
+    }
+    configureRpcThreadpool(16, true /*callerWillJoin*/);
+
+    // Automatic formatting tries to compact the lines, making them less readable
+    // clang-format off
+    const std::vector<InterfacesList> mandatoryInterfaces = {
+        {
+            "Audio Core API",
+            "android.hardware.audio@7.1::IDevicesFactory",
+            "android.hardware.audio@7.0::IDevicesFactory",
+            "android.hardware.audio@6.0::IDevicesFactory",
+            "android.hardware.audio@5.0::IDevicesFactory",
+            "android.hardware.audio@4.0::IDevicesFactory",
+        },
+        {
+            "Audio Effect API",
+            "android.hardware.audio.effect@7.0::IEffectsFactory",
+            "android.hardware.audio.effect@6.0::IEffectsFactory",
+            "android.hardware.audio.effect@5.0::IEffectsFactory",
+            "android.hardware.audio.effect@4.0::IEffectsFactory",
+        }
+    };
+
+    const std::vector<InterfacesList> optionalInterfaces = {
+        {
+            "Soundtrigger API",
+            "android.hardware.soundtrigger@2.3::ISoundTriggerHw",
+            "android.hardware.soundtrigger@2.2::ISoundTriggerHw",
+            "android.hardware.soundtrigger@2.1::ISoundTriggerHw",
+            "android.hardware.soundtrigger@2.0::ISoundTriggerHw",
+        },
+        {
+            "Bluetooth Audio API",
+            "android.hardware.bluetooth.audio@2.2::IBluetoothAudioProvidersFactory",
+            "android.hardware.bluetooth.audio@2.1::IBluetoothAudioProvidersFactory",
+            "android.hardware.bluetooth.audio@2.0::IBluetoothAudioProvidersFactory",
+        },
+        // remove the old HIDL when Bluetooth Audio Hal V2 has offloading supported
+        {
+            "Bluetooth Audio Offload API",
+            "android.hardware.bluetooth.a2dp@1.0::IBluetoothAudioOffload"
+        }
+    };
+    // clang-format on
+
+    for (const auto& listIter : mandatoryInterfaces) {
+        auto iter = listIter.begin();
+        const std::string& interfaceFamilyName = *iter++;
+        LOG_ALWAYS_FATAL_IF(!registerPassthroughServiceImplementations(iter, listIter.end()),
+                            "Could not register %s", interfaceFamilyName.c_str());
+    }
+
+    for (const auto& listIter : optionalInterfaces) {
+        auto iter = listIter.begin();
+        const std::string& interfaceFamilyName = *iter++;
+        ALOGW_IF(!registerPassthroughServiceImplementations(iter, listIter.end()),
+                 "Could not register %s", interfaceFamilyName.c_str());
+    }
+
+    joinRpcThreadpool();
+}
+

device-common.mk

@@ -42,7 +42,7 @@ PRODUCT_ALWAYS_PREOPT_EXTRACTED_APK := true
 PRODUCT_PACKAGES += \
     android.hardware.audio@7.1-impl \
     android.hardware.audio.effect@7.0-impl \
-    android.hardware.audio.service \
+    android.hardware.audio.service.nexus7 \
     android.hardware.bluetooth.audio@2.1-impl \
     audio.bluetooth.default \
     audio.primary.msm8960 \

sepolicy/file_contexts

@@ -87,6 +87,7 @@
 /system/vendor/bin/init\.qcom\.devstart\.sh            u:object_r:init-qcom-devstart-sh_exec:s0
 /system/vendor/bin/init\.qcom\.devwait\.sh             u:object_r:init-qcom-devwait-sh_exec:s0
 
+/(vendor|system/vendor)/bin/hw/android\.hardware\.audio\.service\.nexus7       u:object_r:hal_audio_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.gatekeeper@1\.0-service\.software       u:object_r:hal_gatekeeper_default_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.drm@1\.4-service\.clearkey       u:object_r:hal_drm_clearkey_exec:s0
 /(vendor|system/vendor)/bin/hw/android\.hardware\.power\.stats@1\.0-service\.mock      u:object_r:hal_power_stats_default_exec:s0

sepolicy/hal_audio_default.te

@@ -0,0 +1,3 @@
+get_prop(hal_audio_default, audio_prop)
+allow hal_audio_default default_android_vndservice:service_manager { find };
+