Add engine configuration to the AIDL Audio HAL interface.

Bug: 242678729
Test: m
Change-Id: I9f02399f6b63dca6d7a4c1a848fada0784e18b1d

audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IConfig.aidl

@@ -35,4 +35,5 @@ package android.hardware.audio.core;
 @VintfStability
 interface IConfig {
   android.hardware.audio.core.SurroundSoundConfig getSurroundSoundConfig();
+  android.media.audio.common.AudioHalEngineConfig getEngineConfig();
 }

audio/aidl/android/hardware/audio/core/IConfig.aidl

@@ -17,6 +17,7 @@
 package android.hardware.audio.core;
 
 import android.hardware.audio.core.SurroundSoundConfig;
+import android.media.audio.common.AudioHalEngineConfig;
 
 /**
  * This interface provides system-wide configuration parameters for audio I/O
@@ -34,4 +35,19 @@ interface IConfig {
      * @return The surround sound configuration
      */
     SurroundSoundConfig getSurroundSoundConfig();
+    /**
+     * Returns the configuration items used to determine the audio policy engine
+     * flavor and initial configuration.
+     *
+     * Engine flavor is determined by presence of capSpecificConfig, which must
+     * only be present if the device uses the Configurable Audio Policy (CAP)
+     * engine. Clients normally use the default audio policy engine. The client
+     * will use the CAP engine only when capSpecificConfig has a non-null value.
+     *
+     * This method is expected to only be called during the initialization of
+     * the audio policy engine, and must always return the same result.
+     *
+     * @return The engine configuration
+     */
+    AudioHalEngineConfig getEngineConfig();
 }

audio/aidl/default/Config.cpp

@@ -13,11 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 #define LOG_TAG "AHAL_Module"
 #include <android-base/logging.h>
 
 #include "core-impl/Config.h"
 
+using aidl::android::media::audio::common::AudioHalEngineConfig;
+
 namespace aidl::android::hardware::audio::core {
 ndk::ScopedAStatus Config::getSurroundSoundConfig(SurroundSoundConfig* _aidl_return) {
     SurroundSoundConfig surroundSoundConfig;
@@ -26,4 +29,12 @@ ndk::ScopedAStatus Config::getSurroundSoundConfig(SurroundSoundConfig* _aidl_ret
     LOG(DEBUG) << __func__ << ": returning " << _aidl_return->toString();
     return ndk::ScopedAStatus::ok();
 }
+
+ndk::ScopedAStatus Config::getEngineConfig(AudioHalEngineConfig* _aidl_return) {
+    AudioHalEngineConfig engineConfig;
+    // TODO: parse from XML; for now, use empty config as default
+    *_aidl_return = std::move(engineConfig);
+    LOG(DEBUG) << __func__ << ": returning " << _aidl_return->toString();
+    return ndk::ScopedAStatus::ok();
+}
 }  // namespace aidl::android::hardware::audio::core

audio/aidl/default/include/core-impl/Config.h

@@ -22,6 +22,8 @@ namespace aidl::android::hardware::audio::core {
 
 class Config : public BnConfig {
     ndk::ScopedAStatus getSurroundSoundConfig(SurroundSoundConfig* _aidl_return) override;
+    ndk::ScopedAStatus getEngineConfig(
+            aidl::android::media::audio::common::AudioHalEngineConfig* _aidl_return) override;
 };
 
 }  // namespace aidl::android::hardware::audio::core