Adding a few settings to the camera driver for android.

android/Application.mk.in

 APP_BUILD_SCRIPT := $(call my-dir)/Android.mk
 APP_PROJECT_PATH := $(call my-dir)
 # The ARMv7 is significanly faster due to the use of the hardware FPU
-APP_ABI := armeabi armeabi-v7a
+APP_ABI := ${ARM_TARGETS}
 APP_MODULES      := png jpeg jasper zlib opencv_lapack opencv_core opencv_imgproc opencv_ml opencv_highgui opencv_features2d \
     opencv_legacy opencv_objdetect opencv_calib3d opencv_video opencv_contrib opencv_flann 

android/CMakeLists.txt

@@ -40,6 +40,13 @@ foreach(mdir ${module_includes})
     set(android_module_include_dirs "${android_module_include_dirs} ${n_f}/include")
 endforeach()
 
+set(PossibleArmTargets
+  "armeabi armeabi-v7a;armeabi;armeabi-v7a")
+set(ARM_TARGETS "armeabi armeabi-v7a" CACHE STRING "the arm targets for android, recommend armeabi-v7a for floating point support and neon")
+set_property(CACHE ARM_TARGETS PROPERTY STRINGS ${PossibleArmTargets} )
+
+
+
 configure_file("${CMAKE_SOURCE_DIR}/Android.mk.master.in" "${CMAKE_BINARY_DIR}/Android.mk")
 configure_file("${CMAKE_SOURCE_DIR}/Application.mk.in" "${CMAKE_BINARY_DIR}/Application.mk")
 configure_file("${CMAKE_SOURCE_DIR}/AndroidManifest.xml.in" "${CMAKE_BINARY_DIR}/AndroidManifest.xml")

android/android-jni/res/layout/camerasettings.xml

@@ -27,5 +27,17 @@
 			android:prompt="@string/camera_mode_prompt" android:entries="@array/camera_mode">
 		</Spinner>
 	</LinearLayout>
+	
+		<LinearLayout android:id="@+id/LinearLayout01"
+		android:layout_width="wrap_content" android:layout_height="wrap_content"
+		android:gravity="center_vertical">
+		<TextView android:layout_width="wrap_content"
+			android:layout_height="wrap_content" android:text="@string/whitebalance_prompt" />
+		<Spinner android:id="@+id/whitebalance" android:layout_width="fill_parent"
+			android:layout_height="wrap_content" android:saveEnabled="true"
+			android:prompt="@string/whitebalance_prompt" android:entries="@array/whitebalance">
+		</Spinner>
+	</LinearLayout>
+	
 
 </LinearLayout>

android/android-jni/res/values/settingnumbers.xml

@@ -17,4 +17,15 @@ Image Size:\n(may not be exact)
 <string name="camera_mode_prompt">
 Camera Mode:
 </string>
+
+<string-array name="whitebalance">
+<item>auto</item>
+<item>incandescent</item>
+<item>fluorescent</item>
+<item>daylight</item>
+<item>cloudy-daylight</item>
+</string-array>
+<string name="whitebalance_prompt">
+Whitebalance:
+</string>
 </resources>
\ No newline at end of file

android/android-jni/src/com/opencv/camera/CameraConfig.java

@@ -19,6 +19,7 @@ public class CameraConfig extends Activity {
 	public static final String IMAGE_HEIGHT = "IMAGE_HEIGHT";
 	public static final int CAMERA_MODE_BW = 0;
 	public static final int CAMERA_MODE_COLOR = 1;
+	private static final String WHITEBALANCE = "WHITEBALANCE";
 
 	public static int readCameraMode(Context ctx) {
 		// Restore preferences
@@ -27,6 +28,13 @@ public class CameraConfig extends Activity {
 		int mode = settings.getInt(CAMERA_MODE, CAMERA_MODE_BW);
 		return mode;
 	}
+	
+	public static String readWhitebalace(Context ctx) {
+		// Restore preferences
+		SharedPreferences settings = ctx.getSharedPreferences(CAMERA_SETTINGS,
+				0);
+		return settings.getString(WHITEBALANCE, "auto");
+	}
 
 	static public void setCameraMode(Context context, String mode) {
 		int m = 0;
@@ -92,11 +100,14 @@ public class CameraConfig extends Activity {
 
 		final Spinner size_spinner;
 		final Spinner mode_spinner;
+		final Spinner whitebalance_spinner;
 		size_spinner = (Spinner) findViewById(R.id.image_size);
 		mode_spinner = (Spinner) findViewById(R.id.camera_mode);
+		whitebalance_spinner = (Spinner) findViewById(R.id.whitebalance);
 
 		String strsize = sizeToString(size);
 		String strmode = modeToString(mode);
+		String wbmode = readWhitebalace(getApplicationContext());
 
 		String sizes[] = getResources().getStringArray(R.array.image_sizes);
 
@@ -118,6 +129,16 @@ public class CameraConfig extends Activity {
 		}
 		if(i <= modes.length)
 			mode_spinner.setSelection(i-1);
+		
+		i = 1;
+		String wbmodes[] =  getResources().getStringArray(R.array.whitebalance);
+		for (String x :wbmodes) {
+			if (x.equals(wbmode))
+				break;
+			i++;
+		}
+		if(i <= wbmodes.length)
+			whitebalance_spinner.setSelection(i-1);
 
 		size_spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
 
@@ -150,7 +171,34 @@ public class CameraConfig extends Activity {
 
 			}
 		});
+		
+		whitebalance_spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
+
+			@Override
+			public void onItemSelected(AdapterView<?> arg0, View spinner,
+					int position, long arg3) {
+				Object o = whitebalance_spinner.getItemAtPosition(position);
+				if (o != null)
+					setWhitebalance(spinner.getContext(), (String) o);
+
+			}
+
+
+			@Override
+			public void onNothingSelected(AdapterView<?> arg0) {
+
+			}
+		});
+
+	}
 
+	public static void setWhitebalance(Context ctx, String o) {
+		SharedPreferences settings = ctx.getSharedPreferences(CAMERA_SETTINGS,
+				0);
+		Editor editor = settings.edit();
+		editor.putString(WHITEBALANCE, o);
+		editor.commit();
+		
 	}
 
 	private String modeToString(int mode) {

android/android-jni/src/com/opencv/camera/NativePreviewer.java

@@ -23,6 +23,8 @@ import com.opencv.camera.NativeProcessor.PoolCallback;
 public class NativePreviewer extends SurfaceView implements
 		SurfaceHolder.Callback, Camera.PreviewCallback, NativeProcessorCallback {
 
+	private String whitebalance_mode = "auto";
+
 	/** Constructor useful for defining a NativePreviewer in android layout xml
 	 * 
 	 * @param context
@@ -94,6 +96,7 @@ public class NativePreviewer extends SurfaceView implements
 		int mode = CameraConfig.readCameraMode(ctx);
 		setPreviewSize(size[0], size[1]);
 		setGrayscale(mode == CameraConfig.CAMERA_MODE_BW ? true : false);
+		whitebalance_mode = CameraConfig.readWhitebalace(ctx);
 	}
 
 	public void surfaceCreated(SurfaceHolder holder) {
@@ -135,8 +138,20 @@ public class NativePreviewer extends SurfaceView implements
 		
 		Log.d("NativePreviewer", "Determined compatible preview size is: (" + preview_width + "," + preview_height+")");
 
+		Log.d("NativePreviewer","Supported params: " + mCamera.getParameters().flatten());
+		
+		//this is available in 8+
+		//parameters.setExposureCompensation(0);
+		parameters.setWhiteBalance(whitebalance_mode);
+		parameters.setAntibanding(Camera.Parameters.ANTIBANDING_OFF);
+		
 		List<String> fmodes = mCamera.getParameters().getSupportedFocusModes();
+		//for(String x: fmodes){
+			
+		//}
 
+		if(parameters.get("meter-mode")!=null)
+			parameters.set("meter-mode","meter-average");
 		int idx = fmodes.indexOf(Camera.Parameters.FOCUS_MODE_INFINITY);
 		if (idx != -1) {
 			parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_INFINITY);
@@ -151,9 +166,10 @@ public class NativePreviewer extends SurfaceView implements
 		List<String> scenemodes = mCamera.getParameters()
 				.getSupportedSceneModes();
 		if (scenemodes != null)
-			if (scenemodes.indexOf(Camera.Parameters.SCENE_MODE_STEADYPHOTO) != -1) {
+			if (scenemodes.indexOf(Camera.Parameters.SCENE_MODE_ACTION) != -1) {
 				parameters
-						.setSceneMode(Camera.Parameters.SCENE_MODE_STEADYPHOTO);
+						.setSceneMode(Camera.Parameters.SCENE_MODE_ACTION);
+				Log.d("NativePreviewer","set scenemode to action");
 			}
 
 		parameters.setPreviewSize(preview_width, preview_height);