From cad9f7f7aeaf57e5fead759bcc68b75262ba3708 Mon Sep 17 00:00:00 2001
From: Peter Cai <peter@typeblog.net>
Date: Wed, 24 Aug 2022 15:45:18 -0400
Subject: [PATCH 3/3] audio_hal_interface: Optionally use sysbta HAL

Required to support sysbta, our system-side bt audio implementation.

Change-Id: I59973e6ec84c5923be8a7c67b36b2e237f000860
---
 system/audio_hal_interface/aidl/client_interface_aidl.cc | 6 +++---
 system/audio_hal_interface/aidl/client_interface_aidl.h  | 7 +++++++
 system/audio_hal_interface/hal_version_manager.cc        | 9 ++++++++-
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/system/audio_hal_interface/aidl/client_interface_aidl.cc b/system/audio_hal_interface/aidl/client_interface_aidl.cc
index 814c6c7796..a38b6da495 100644
--- a/system/audio_hal_interface/aidl/client_interface_aidl.cc
+++ b/system/audio_hal_interface/aidl/client_interface_aidl.cc
@@ -55,7 +55,7 @@ BluetoothAudioClientInterface::BluetoothAudioClientInterface(
 
 bool BluetoothAudioClientInterface::is_aidl_available() {
   auto service = AServiceManager_checkService(
-      kDefaultAudioProviderFactoryInterface.c_str());
+      audioProviderFactoryInterface().c_str());
   return (service != nullptr);
 }
 
@@ -72,7 +72,7 @@ BluetoothAudioClientInterface::GetAudioCapabilities(SessionType session_type) {
   }
   auto provider_factory = IBluetoothAudioProviderFactory::fromBinder(
       ::ndk::SpAIBinder(AServiceManager_getService(
-          kDefaultAudioProviderFactoryInterface.c_str())));
+          audioProviderFactoryInterface().c_str())));
 
   if (provider_factory == nullptr) {
     LOG(ERROR) << __func__ << ", can't get capability from unknown factory";
@@ -100,7 +100,7 @@ void BluetoothAudioClientInterface::FetchAudioProvider() {
   }
   auto provider_factory = IBluetoothAudioProviderFactory::fromBinder(
       ::ndk::SpAIBinder(AServiceManager_getService(
-          kDefaultAudioProviderFactoryInterface.c_str())));
+          audioProviderFactoryInterface().c_str())));
 
   if (provider_factory == nullptr) {
     LOG(ERROR) << __func__ << ", can't get capability from unknown factory";
diff --git a/system/audio_hal_interface/aidl/client_interface_aidl.h b/system/audio_hal_interface/aidl/client_interface_aidl.h
index 87dd450997..36d5fa5e86 100644
--- a/system/audio_hal_interface/aidl/client_interface_aidl.h
+++ b/system/audio_hal_interface/aidl/client_interface_aidl.h
@@ -28,6 +28,7 @@
 #include "bluetooth_audio_port_impl.h"
 #include "common/message_loop_thread.h"
 #include "transport_instance.h"
+#include "osi/include/properties.h"
 
 #define BLUETOOTH_AUDIO_HAL_PROP_DISABLED \
   "persist.bluetooth.bluetooth_audio_hal.disabled"
@@ -115,6 +116,12 @@ class BluetoothAudioClientInterface {
   //     "android.hardware.bluetooth.audio.IBluetoothAudioProviderFactory/default";
   static inline const std::string kDefaultAudioProviderFactoryInterface =
       std::string() + IBluetoothAudioProviderFactory::descriptor + "/default";
+  static inline const std::string kSystemAudioProviderFactoryInterface =
+      std::string() + IBluetoothAudioProviderFactory::descriptor + "/sysbta";
+  static inline const std::string audioProviderFactoryInterface() {
+   return osi_property_get_bool("persist.bluetooth.system_audio_hal.enabled", false)
+    ? kSystemAudioProviderFactoryInterface : kDefaultAudioProviderFactoryInterface;
+  }
 
  private:
   IBluetoothTransportInstance* transport_;
diff --git a/system/audio_hal_interface/hal_version_manager.cc b/system/audio_hal_interface/hal_version_manager.cc
index a2c192f37d..c3d1cf35c2 100644
--- a/system/audio_hal_interface/hal_version_manager.cc
+++ b/system/audio_hal_interface/hal_version_manager.cc
@@ -24,6 +24,7 @@
 #include <memory>
 
 #include "aidl/audio_aidl_interfaces.h"
+#include "osi/include/properties.h"
 
 namespace bluetooth {
 namespace audio {
@@ -33,6 +34,12 @@ using ::aidl::android::hardware::bluetooth::audio::
 
 static const std::string kDefaultAudioProviderFactoryInterface =
     std::string() + IBluetoothAudioProviderFactory::descriptor + "/default";
+static const std::string kSystemAudioProviderFactoryInterface =
+    std::string() + IBluetoothAudioProviderFactory::descriptor + "/sysbta";
+static inline const std::string audioProviderFactoryInterface() {
+  return osi_property_get_bool("persist.bluetooth.system_audio_hal.enabled", false)
+    ? kSystemAudioProviderFactoryInterface : kDefaultAudioProviderFactoryInterface;
+}
 
 std::unique_ptr<HalVersionManager> HalVersionManager::instance_ptr =
     std::make_unique<HalVersionManager>();
@@ -92,7 +99,7 @@ HalVersionManager::GetProvidersFactory_2_0() {
 
 HalVersionManager::HalVersionManager() {
   if (AServiceManager_checkService(
-          kDefaultAudioProviderFactoryInterface.c_str()) != nullptr) {
+          audioProviderFactoryInterface().c_str()) != nullptr) {
     hal_version_ = BluetoothAudioHalVersion::VERSION_AIDL_V1;
     return;
   }
-- 
2.37.2