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Merge pull request #12836 from JosJuice/opensles-buffer-size

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Android: Ask system for optimal audio buffer size and sample rate
This commit is contained in:
JMC47
2025-06-07 23:07:37 -04:00
committed by GitHub
parent 19fbbf0dba f99d3dbd5c
commit 24b0bf01d5
5 changed files with 156 additions and 70 deletions
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28
Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/AudioUtils.kt Normal file
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@ -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
}
}
}

27
Source/Android/jni/AndroidCommon/IDCache.cpp
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@ -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);
}
}

4
Source/Android/jni/AndroidCommon/IDCache.h
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@ -121,4 +121,8 @@ jmethodID GetPermissionHandlerRequestRecordAudioPermission();
jmethodID GetRunnableRun();
jclass GetAudioUtilsClass();
jmethodID GetAudioUtilsGetSampleRate();
jmethodID GetAudioUtilsGetFramesPerBuffer();
} // namespace IDCache