The native audio stuff makes noise now (although just the sawtooth).

android/app-android.cpp

@@ -93,7 +93,7 @@ extern "C" jboolean Java_com_turboviking_libnative_NativeApp_isLandscape(JNIEnv
 
 extern "C" void Java_com_turboviking_libnative_NativeApp_init
   (JNIEnv *env, jclass, jint xxres, jint yyres, jstring apkpath,
-   jstring dataDir, jstring externalDir, jstring jinstallID, jboolean juseNativeAudio) {
+   jstring dataDir, jstring externalDir, jstring libraryDir, jstring jinstallID, jboolean juseNativeAudio) {
   jniEnvUI = env;
   pixel_xres = xxres;
   pixel_yres = yyres;
@@ -123,6 +123,9 @@ extern "C" void Java_com_turboviking_libnative_NativeApp_init
   str = env->GetStringUTFChars(dataDir, &isCopy);
   std::string user_data_path = std::string(str) + "/";
 
+	str = env->GetStringUTFChars(libraryDir, &isCopy);
+  std::string library_path = std::string(str) + "/";
+
   str = env->GetStringUTFChars(jinstallID, &isCopy);
   std::string installID = std::string(str);
 
@@ -133,13 +136,21 @@ extern "C" void Java_com_turboviking_libnative_NativeApp_init
 	NativeGetAppInfo(&app_name, &app_nice_name, &landscape);
 	const char *argv[2] = {app_name.c_str(), 0};
   NativeInit(1, argv, user_data_path.c_str(), installID.c_str());
+
+	if (use_native_audio) {
+		AndroidAudio_Init(&NativeMix, library_path);
+	}
 }  
 
 extern "C" void Java_com_turboviking_libnative_NativeApp_shutdown
   (JNIEnv *, jclass) {
   ILOG("NativeShutdown.");
-  if (renderer_inited) {
+ 	if (use_native_audio) {
+		AndroidAudio_Shutdown();
+	}
+	if (renderer_inited) {
     NativeShutdownGraphics();
+		renderer_inited = false;
   }
   NativeShutdown();
   ILOG("VFSShutdown.");

android/native-audio-so.cpp

@@ -31,6 +31,8 @@
 #include <SLES/OpenSLES.h>
 #include <SLES/OpenSLES_Android.h>
 
+#include "../base/logging.h"
+
 // engine interfaces
 static SLObjectItf engineObject = NULL;
 static SLEngineItf engineEngine;
@@ -57,6 +59,7 @@ static unsigned nextSize;
 // synthesize a mono sawtooth wave and place it into a buffer (called automatically on load)
 __attribute__((constructor)) static void onDlOpen(void)
 {
+	ILOG("Buffer callback");
 	unsigned int i;
 	for (i = 0; i < SAWTOOTH_FRAMES; ++i) {
 		sawtoothBuffer[i] = 32768 - ((i % 100) * 660);
@@ -98,9 +101,7 @@ extern "C" bool OpenSLWrap_Init()
 	assert(SL_RESULT_SUCCESS == result);
 
 	// create output mix, with environmental reverb specified as a non-required interface
-	const SLInterfaceID ids1[1] = {SL_IID_ENVIRONMENTALREVERB};
-	const SLboolean req1[1] = {SL_BOOLEAN_FALSE};
-	result = (*engineEngine)->CreateOutputMix(engineEngine, &outputMixObject, 1, ids1, req1);
+	result = (*engineEngine)->CreateOutputMix(engineEngine, &outputMixObject, 0, 0, 0);
 	assert(SL_RESULT_SUCCESS == result);
 
 	// realize the output mix
@@ -130,10 +131,10 @@ extern "C" bool OpenSLWrap_Init()
 	SLDataSink audioSnk = {&loc_outmix, NULL};
 
 	// create audio player
-	const SLInterfaceID ids[3] = {SL_IID_BUFFERQUEUE, SL_IID_VOLUME};
-	const SLboolean req[3] = {SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE};
+	const SLInterfaceID ids[2] = {SL_IID_BUFFERQUEUE, SL_IID_VOLUME};
+	const SLboolean req[2] = {SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE};
 	result = (*engineEngine)->CreateAudioPlayer(engineEngine, &bqPlayerObject, &audioSrc, &audioSnk,
-			3, ids, req);
+			2, ids, req);
 	assert(SL_RESULT_SUCCESS == result);
 
 	// realize the player
@@ -161,12 +162,10 @@ extern "C" bool OpenSLWrap_Init()
 	result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_PLAYING);
 	assert(SL_RESULT_SUCCESS == result);
 
-	if (nextBuffer) {
-		SLresult result;
-		result = (*bqPlayerBufferQueue)->Enqueue(bqPlayerBufferQueue, nextBuffer, nextSize);
-		if (SL_RESULT_SUCCESS != result) {
-			return false;
-		}
+	// Enqueue a first buffer.
+	result = (*bqPlayerBufferQueue)->Enqueue(bqPlayerBufferQueue, sawtoothBuffer, sizeof(sawtoothBuffer));
+	if (SL_RESULT_SUCCESS != result) {
+		return false;
 	}
 	return true;
 }

android/native_audio.cpp

@@ -1,18 +1,21 @@
 #include <dlfcn.h>
+#include <errno.h>
 
 #include "base/logging.h"
 #include "android/native_audio.h"
 #include "android/native-audio-so.h"
 
 static void *so;
+
 static OpenSLWrap_Init_T init_func;
 static OpenSLWrap_Shutdown_T shutdown_func;
 
-bool AndroidAudio_Init(AndroidAudioCallback cb) {
+bool AndroidAudio_Init(AndroidAudioCallback cb, std::string libraryDir) {
 	ILOG("Loading native audio library...");
-	so = dlopen("libnative_audio.so", RTLD_NOW);
+	std::string so_filename = libraryDir + "/libnative_audio.so";
+	so = dlopen(so_filename.c_str(), RTLD_LAZY);
 	if (!so) {
-		ELOG("Failed to find native audio library");
+		ELOG("Failed to find native audio library: %i: %s ", errno, dlerror());
 		return false;
 	}
 	init_func = (OpenSLWrap_Init_T)dlsym(so, "OpenSLWrap_Init");
@@ -24,7 +27,6 @@ bool AndroidAudio_Init(AndroidAudioCallback cb) {
 	return init_retval;
 }
 
-
 void AndroidAudio_Shutdown() {
 	ILOG("Calling OpenSLWrap_Shutdown_T...");
 	shutdown_func();

android/native_audio.h

@@ -1,12 +1,12 @@
 #pragma once
 
 #include "native-audio-so.h"
-
+#include <string>
 // This is the file you should include from your program. It dynamically loads
 // the native_audio.so shared object and sets up the function pointers.
 
 // Do not call this if you have detected that the android version is below
 // 2.2, as it will fail miserably.
 
-bool AndroidAudio_Init(AndroidAudioCallback cb);
+bool AndroidAudio_Init(AndroidAudioCallback cb, std::string libraryDir);
 void AndroidAudio_Shutdown();

android/src/com/turboviking/libnative/NativeActivity.java

@@ -3,6 +3,7 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.RandomAccessFile;
+import java.lang.reflect.Field;
 import java.util.UUID;
 
 import javax.microedition.khronos.egl.EGLConfig;
@@ -93,6 +94,24 @@ public class NativeActivity extends Activity {
 	
 	public static String installID;
 	
+	String getApplicationLibraryDir(ApplicationInfo application) {    
+	    String libdir = null;
+	    try {
+	        // Starting from Android 2.3, nativeLibraryDir is available:
+	        Field field = ApplicationInfo.class.getField("nativeLibraryDir");
+	        libdir = (String) field.get(application);
+	    } catch (SecurityException e1) {
+	    } catch (NoSuchFieldException e1) {
+	    } catch (IllegalArgumentException e) {
+	    } catch (IllegalAccessException e) {
+	    }
+	    if (libdir == null) {
+	        // Fallback for Android < 2.3:
+	        libdir = application.dataDir + "/lib";
+	    }
+	    return libdir;
+	}
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
     	if (NativeApp.isLandscape()) {
@@ -113,6 +132,7 @@ public class NativeActivity extends Activity {
 		    e.printStackTrace();
 		    throw new RuntimeException("Unable to locate assets, aborting...");
 	    }
+		String libraryDir = getApplicationLibraryDir(appInfo);
 	    File sdcard = Environment.getExternalStorageDirectory();
         Display display = ((WindowManager)this.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
         int scrPixelFormat = display.getPixelFormat();
@@ -123,7 +143,7 @@ public class NativeActivity extends Activity {
 	    String dataDir = this.getFilesDir().getAbsolutePath();
 		String apkFilePath = appInfo.sourceDir; 
 		NativeApp.sendMessage("Message from Java", "Hot Coffee");
-		NativeApp.init(scrWidth, scrHeight, apkFilePath, dataDir, externalStorageDir, installID, useOpenSL);
+		NativeApp.init(scrWidth, scrHeight, apkFilePath, dataDir, externalStorageDir, libraryDir, installID, useOpenSL);
      
  		// Keep the screen bright - very annoying if it goes dark when tilting away
 		Window window = this.getWindow();

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

@@ -4,7 +4,7 @@ public class NativeApp {
 	public static native boolean isLandscape();
 	public static native void init(
 			int xxres, int yyres, String apkPath,
-			String dataDir, String externalDir, String installID, boolean useOpenSL);
+			String dataDir, String externalDir, String libraryDir, String installID, boolean useOpenSL);
 	public static native void shutdown();
 	 
 	public static native void keyDown(int key);