Fixed bug 3191 - haptic system on android?

Patch provided by jintiao and Milan Nikolic, thanks!

Android.mk

@@ -28,7 +28,7 @@ LOCAL_SRC_FILES := \
 	$(wildcard $(LOCAL_PATH)/src/events/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/file/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/haptic/*.c) \
-	$(wildcard $(LOCAL_PATH)/src/haptic/dummy/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/haptic/android/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/joystick/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/joystick/android/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/loadso/dlopen/*.c) \

android-project/AndroidManifest.xml

@@ -16,6 +16,8 @@
 
     <!-- Allow writing to external storage -->
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <!-- Allow access to the vibrator -->
+    <uses-permission android:name="android.permission.VIBRATE" />
 
     <!-- if you want to capture audio, uncomment this. -->
     <!-- <uses-permission android:name="android.permission.RECORD_AUDIO" /> -->

android-project/src/org/libsdl/app/SDLActivity.java

@@ -61,6 +61,7 @@
     protected static View mTextEdit;
     protected static ViewGroup mLayout;
     protected static SDLJoystickHandler mJoystickHandler;
+    protected static SDLHapticHandler mHapticHandler;
 
     // This is what SDL runs in. It invokes SDL_main(), eventually
     protected static Thread mSDLThread;
@@ -113,6 +114,7 @@ public static void initialize() {
         mTextEdit = null;
         mLayout = null;
         mJoystickHandler = null;
+        mHapticHandler = null;
         mSDLThread = null;
         mAudioTrack = null;
         mAudioRecord = null;
@@ -182,6 +184,7 @@ public void onClick(DialogInterface dialog,int id) {
         else {
             mJoystickHandler = new SDLJoystickHandler();
         }
+        mHapticHandler = new SDLHapticHandler();
 
         mLayout = new RelativeLayout(this);
         mLayout.addView(mSurface);
@@ -498,6 +501,8 @@ public static native int nativeAddJoystick(int device_id, String name,
                                                int is_accelerometer, int nbuttons,
                                                int naxes, int nhats, int nballs);
     public static native int nativeRemoveJoystick(int device_id);
+    public static native int nativeAddHaptic(int device_id, String name);
+    public static native int nativeRemoveHaptic(int device_id);
     public static native String nativeGetHint(String name);
 
     /**
@@ -1704,6 +1709,18 @@ protected SDLJoystick getJoystick(int device_id) {
         return null;
     }
 
+    public static void pollHapticDevices() {
+        if (SDLActivity.mSDLThread != null) {
+            mHapticHandler.pollHapticDevices();
+        }
+    }
+
+    public static void hapticRun(int device_id, int length) {
+        if (SDLActivity.mSDLThread != null) {
+            mHapticHandler.run(device_id, length);
+        }
+    }
+
     @Override
     public boolean handleMotionEvent(MotionEvent event) {
         if ((event.getSource() & InputDevice.SOURCE_JOYSTICK) != 0) {
@@ -1779,3 +1796,82 @@ public boolean onGenericMotion(View v, MotionEvent event) {
         return false;
     }
 }
+
+class SDLHapticHandler {
+
+    class SDLHaptic {
+        public int device_id;
+        public String name;
+        public Vibrator vib;
+    }
+
+    private ArrayList<SDLHaptic> mHaptics;
+
+    public SDLHapticHandler() {
+        mHaptics = new ArrayList<SDLHaptic>();
+    }
+
+    public void run(int device_id, int length) {
+        SDLHaptic haptic = getHaptic(device_id);
+        if (haptic != null) {
+            haptic.vib.vibrate (length);
+        }
+    }
+
+    public void pollHapticDevices() {
+        int[] deviceIds = InputDevice.getDeviceIds();
+        // It helps processing the device ids in reverse order
+        // For example, in the case of the XBox 360 wireless dongle,
+        // so the first controller seen by SDL matches what the receiver
+        // considers to be the first controller
+
+        for(int i=deviceIds.length-1; i>-1; i--) {
+            SDLHaptic haptic = getHaptic(deviceIds[i]);
+            if (haptic == null) {
+                InputDevice device = InputDevice.getDevice(deviceIds[i]);
+                Vibrator vib = device.getVibrator ();
+                if(vib.hasVibrator ()) {
+                    haptic = new SDLHaptic();
+                    haptic.device_id = deviceIds[i];
+                    haptic.name = device.getName();
+                    haptic.vib = vib;
+                    mHaptics.add(haptic);
+                    SDLActivity.nativeAddHaptic(haptic.device_id, haptic.name);
+                }
+            }
+        }
+
+        /* Check removed devices */
+        ArrayList<Integer> removedDevices = new ArrayList<Integer>();
+        for(int i=0; i < mHaptics.size(); i++) {
+            int device_id = mHaptics.get(i).device_id;
+            int j;
+            for (j=0; j < deviceIds.length; j++) {
+                if (device_id == deviceIds[j]) break;
+            }
+            if (j == deviceIds.length) {
+                removedDevices.add(device_id);
+            }
+        }
+
+        for(int i=0; i < removedDevices.size(); i++) {
+            int device_id = removedDevices.get(i);
+            SDLActivity.nativeRemoveHaptic(device_id);
+            for (int j=0; j < mHaptics.size(); j++) {
+                if (mHaptics.get(j).device_id == device_id) {
+                    mHaptics.remove(j);
+                    break;
+                }
+            }
+        }
+    }
+
+    protected SDLHaptic getHaptic(int device_id) {
+        for(int i=0; i < mHaptics.size(); i++) {
+            if (mHaptics.get(i).device_id == device_id) {
+                return mHaptics.get(i);
+            }
+        }
+        return null;
+    }   
+}

include/SDL_config_android.h

@@ -118,7 +118,7 @@
 
 /* Enable various input drivers */
 #define SDL_JOYSTICK_ANDROID    1
-#define SDL_HAPTIC_DUMMY    1
+#define SDL_HAPTIC_ANDROID    1
 
 /* Enable various shared object loading systems */
 #define SDL_LOADSO_DLOPEN   1

src/core/android/SDL_android.c

@@ -37,6 +37,7 @@
 #include "../../video/android/SDL_androidvideo.h"
 #include "../../video/android/SDL_androidwindow.h"
 #include "../../joystick/android/SDL_sysjoystick_c.h"
+#include "../../haptic/android/SDL_syshaptic_c.h"
 
 #include <android/log.h>
 #include <pthread.h>
@@ -177,6 +178,8 @@ static jmethodID midCaptureReadShortBuffer;
 static jmethodID midCaptureReadByteBuffer;
 static jmethodID midCaptureClose;
 static jmethodID midPollInputDevices;
+static jmethodID midPollHapticDevices;
+static jmethodID midHapticRun;
 
 /* Accelerometer data storage */
 static float fLastAccelerometer[3];
@@ -237,13 +240,17 @@ JNIEXPORT void JNICALL SDL_Android_Init(JNIEnv* mEnv, jclass cls)
                                 "captureClose", "()V");
     midPollInputDevices = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
                                 "pollInputDevices", "()V");
+    midPollHapticDevices = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
+                                "pollHapticDevices", "()V");
+    midHapticRun = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
+                                "hapticRun", "(II)V");
 
     bHasNewData = SDL_FALSE;
 
     if (!midGetNativeSurface ||
        !midAudioOpen || !midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioClose ||
        !midCaptureOpen || !midCaptureReadShortBuffer || !midCaptureReadByteBuffer || !midCaptureClose ||
-       !midPollInputDevices) {
+       !midPollInputDevices || !midPollHapticDevices || !midHapticRun) {
         __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL: Couldn't locate Java callbacks, check that they're named and typed correctly");
     }
     __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init() finished!");
@@ -323,6 +330,25 @@ JNIEXPORT jint JNICALL SDL_JAVA_INTERFACE(nativeRemoveJoystick)(
     return Android_RemoveJoystick(device_id);
 }
 
+JNIEXPORT jint JNICALL Java_org_libsdl_app_SDLActivity_nativeAddHaptic(
+    JNIEnv* env, jclass jcls, jint device_id, jstring device_name)
+{
+    int retval;
+    const char *name = (*env)->GetStringUTFChars(env, device_name, NULL);
+
+    retval = Android_AddHaptic(device_id, name);
+
+    (*env)->ReleaseStringUTFChars(env, device_name, name);
+
+    return retval;
+}
+
+JNIEXPORT jint JNICALL Java_org_libsdl_app_SDLActivity_nativeRemoveHaptic(
+    JNIEnv* env, jclass jcls, jint device_id)
+{
+    return Android_RemoveHaptic(device_id);
+}
+
 
 /* Surface Created */
 JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeSurfaceChanged)(JNIEnv* env, jclass jcls)
@@ -1570,6 +1596,19 @@ void Android_JNI_PollInputDevices(void)
     (*env)->CallStaticVoidMethod(env, mActivityClass, midPollInputDevices);    
 }
 
+void Android_JNI_PollHapticDevices(void)
+{
+    JNIEnv *env = Android_JNI_GetEnv();
+    (*env)->CallStaticVoidMethod(env, mActivityClass, midPollHapticDevices);
+}
+
+void Android_JNI_HapticRun(int device_id, int length)
+{
+    JNIEnv *env = Android_JNI_GetEnv();
+    (*env)->CallStaticVoidMethod(env, mActivityClass, midHapticRun, device_id, length);
+}
+
+
 /* See SDLActivity.java for constants. */
 #define COMMAND_SET_KEEP_SCREEN_ON    5
 

src/core/android/SDL_android.h

@@ -67,6 +67,10 @@ int Android_JNI_GetPowerInfo(int* plugged, int* charged, int* battery, int* seco
 /* Joystick support */
 void Android_JNI_PollInputDevices(void);
 
+/* Haptic support */
+void Android_JNI_PollHapticDevices(void);
+void Android_JNI_HapticRun(int device_id, int length);
+
 /* Video */
 void Android_JNI_SuspendScreenSaver(SDL_bool suspend);
 

src/haptic/SDL_haptic.c

@@ -313,6 +313,7 @@ SDL_HapticOpenFromJoystick(SDL_Joystick * joystick)
     SDL_memset(haptic, 0, sizeof(SDL_Haptic));
     haptic->rumble_id = -1;
     if (SDL_SYS_HapticOpenFromJoystick(haptic, joystick) < 0) {
+        SDL_SetError("Haptic: SDL_SYS_HapticOpenFromJoystick failed.");
         SDL_free(haptic);
         return NULL;
     }