3 files changed, 59 insertions, 0 deletions
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/AudioUtils.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/AudioUtils.kt
new file mode 100644
index 0000000000..68e3573fa5
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/AudioUtils.kt
@@ -0,0 +1,28 @@
+package org.dolphinemu.dolphinemu.utils
+
+import android.content.Context
+import android.media.AudioManager
+import androidx.annotation.Keep
+import org.dolphinemu.dolphinemu.DolphinApplication
+
+object AudioUtils {
+    @JvmStatic @Keep
+    fun getSampleRate(): Int =
+        getAudioServiceProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE, 48000)
+
+    @JvmStatic @Keep
+    fun getFramesPerBuffer(): Int =
+        getAudioServiceProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER, 256)
+
+    private fun getAudioServiceProperty(property: String, fallback: Int): Int {
+        return try {
+            val context = DolphinApplication.getAppContext()
+            val am = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
+            Integer.parseUnsignedInt(am.getProperty(property))
+        } catch (e: NullPointerException) {
+            fallback
+        } catch (e: NumberFormatException) {
+            fallback
+        }
+    }
+}
diff --git a/Source/Android/jni/AndroidCommon/IDCache.cpp b/Source/Android/jni/AndroidCommon/IDCache.cpp
index 08ec2c9804..d8dfa2b7c4 100644
--- a/Source/Android/jni/AndroidCommon/IDCache.cpp
+++ b/Source/Android/jni/AndroidCommon/IDCache.cpp
@@ -122,6 +122,10 @@ static jmethodID s_permission_handler_request_record_audio_permission;
 
 static jmethodID s_runnable_run;
 
+static jclass s_audio_utils_class;
+static jmethodID s_audio_utils_get_sample_rate;
+static jmethodID s_audio_utils_get_frames_per_buffer;
+
 namespace IDCache
 {
 JNIEnv* GetEnvForThread()
@@ -562,6 +566,21 @@ jmethodID GetRunnableRun()
   return s_runnable_run;
 }
 
+jclass GetAudioUtilsClass()
+{
+  return s_audio_utils_class;
+}
+
+jmethodID GetAudioUtilsGetSampleRate()
+{
+  return s_audio_utils_get_sample_rate;
+}
+
+jmethodID GetAudioUtilsGetFramesPerBuffer()
+{
+  return s_audio_utils_get_frames_per_buffer;
+}
+
 }  // namespace IDCache
 
 extern "C" {
@@ -798,6 +817,13 @@ JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved)
   s_runnable_run = env->GetMethodID(runnable_class, "run", "()V");
   env->DeleteLocalRef(runnable_class);
 
+  const jclass audio_utils_class = env->FindClass("org/dolphinemu/dolphinemu/utils/AudioUtils");
+  s_audio_utils_class = reinterpret_cast<jclass>(env->NewGlobalRef(audio_utils_class));
+  s_audio_utils_get_sample_rate = env->GetStaticMethodID(audio_utils_class, "getSampleRate", "()I");
+  s_audio_utils_get_frames_per_buffer =
+      env->GetStaticMethodID(audio_utils_class, "getFramesPerBuffer", "()I");
+  env->DeleteLocalRef(audio_utils_class);
+
   return JNI_VERSION;
 }
 
@@ -834,5 +860,6 @@ JNIEXPORT void JNI_OnUnload(JavaVM* vm, void* reserved)
   env->DeleteGlobalRef(s_core_device_control_class);
   env->DeleteGlobalRef(s_input_detector_class);
   env->DeleteGlobalRef(s_permission_handler_class);
+  env->DeleteGlobalRef(s_audio_utils_class);
 }
 }
diff --git a/Source/Android/jni/AndroidCommon/IDCache.h b/Source/Android/jni/AndroidCommon/IDCache.h
index 3cc8c11b5e..e44e68e431 100644
--- a/Source/Android/jni/AndroidCommon/IDCache.h
+++ b/Source/Android/jni/AndroidCommon/IDCache.h
@@ -121,4 +121,8 @@ jmethodID GetPermissionHandlerRequestRecordAudioPermission();
 
 jmethodID GetRunnableRun();
 
+jclass GetAudioUtilsClass();
+jmethodID GetAudioUtilsGetSampleRate();
+jmethodID GetAudioUtilsGetFramesPerBuffer();
+
 }  // namespace IDCache