Merge pull request #78 from unknownbrackets/audio-timing

Return number of samples in NativeApp::audioRender()

android/.classpath

@@ -4,5 +4,6 @@
 	<classpathentry kind="src" path="gen"/>
 	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
 	<classpathentry kind="con" path="com.android.ide.eclipse.adt.LIBRARIES"/>
+	<classpathentry exported="true" kind="con" path="com.android.ide.eclipse.adt.DEPENDENCIES"/>
 	<classpathentry kind="output" path="bin/classes"/>
 </classpath>

android/app-android.cpp

@@ -294,7 +294,7 @@ extern "C" void Java_com_henrikrydgard_libnative_NativeRenderer_displayRender(JN
 	}
 }
 
-extern "C" void Java_com_henrikrydgard_libnative_NativeApp_audioRender(JNIEnv*	env, jclass clazz, jshortArray array) {
+extern "C" jint Java_com_henrikrydgard_libnative_NativeApp_audioRender(JNIEnv*	env, jclass clazz, jshortArray array) {
 	// Too spammy
 	// ILOG("NativeApp.audioRender");
 
@@ -305,9 +305,16 @@ extern "C" void Java_com_henrikrydgard_libnative_NativeApp_audioRender(JNIEnv*	e
 	if (buf_size) {
 		short *data = env->GetShortArrayElements(array, 0);
 		int samples = buf_size / 2;
-		NativeMix(data, samples);
-		env->ReleaseShortArrayElements(array, data, 0);
+		samples = NativeMix(data, samples);
+		if (samples != 0) {
+			env->ReleaseShortArrayElements(array, data, 0);
+			return samples * 2;
+		} else {
+			env->ReleaseShortArrayElements(array, data, JNI_ABORT);
+			return 0;
+		}
 	}
+	return 0;
 }
 
 extern "C" void JNICALL Java_com_henrikrydgard_libnative_NativeApp_touch

android/src/com/henrikrydgard/libnative/NativeApp.java

@@ -21,7 +21,7 @@ public class NativeApp {
 	public static native void joystickEvent(float x, float y);
 
 	// will only be called between init() and shutdown()
-	public static native void audioRender(short[] buffer);
+	public static native int audioRender(short[] buffer);
 
 	// Sensor/input data. These are asynchronous, beware!
 	public static native void touch(float x, float y, int data, int pointerId);

android/src/com/henrikrydgard/libnative/NativeAudioPlayer.java

@@ -81,8 +81,11 @@ public class NativeAudioPlayer {
 			audioTrack.play();
 			Log.i(TAG, "Playing... minBuffersize = " + buffer_size);
 			while (playing_) {
-				NativeApp.audioRender(buffer);
-				audioTrack.write(buffer, 0, buffer_size);
+				int validShorts = NativeApp.audioRender(buffer);
+				if (validShorts != 0) {
+					audioTrack.write(buffer, 0, validShorts);
+				}
+				Thread.yield();
 			}
 			audioTrack.stop();
 			audioTrack.release();