androidcamera: Add autofocus support

sys/androidcamera/com/gstreamer/GstAhcCallback.java

@@ -2,7 +2,9 @@ package com.gstreamer;
 
 import android.hardware.Camera;
 
-public class GstAhcCallback implements Camera.PreviewCallback, Camera.ErrorCallback {
+public class GstAhcCallback implements Camera.PreviewCallback,
+                                       Camera.ErrorCallback,
+                                       Camera.AutoFocusCallback {
     public long mUserData;
     public long mCallback;
 
@@ -10,6 +12,8 @@ public class GstAhcCallback implements Camera.PreviewCallback, Camera.ErrorCallb
                                                              long callback, long user_data);
     public static native void gst_ah_camera_on_error(int error, Camera camera,
                                                      long callback, long user_data);
+    public static native void gst_ah_camera_on_auto_focus(boolean success, Camera camera,
+                                                             long callback, long user_data);
 
     public GstAhcCallback(long callback, long user_data) {
         mCallback = callback;
@@ -25,4 +29,9 @@ public class GstAhcCallback implements Camera.PreviewCallback, Camera.ErrorCallb
     public void onError(int error, Camera camera) {
         gst_ah_camera_on_error(error, camera, mCallback, mUserData);
     }
+
+    @Override
+    public void onAutoFocus(boolean success, Camera camera) {
+        gst_ah_camera_on_auto_focus(success, camera, mCallback, mUserData);
+    }
 }

sys/androidcamera/gst-android-hardware-camera.c

@@ -32,6 +32,8 @@ static struct
 {
   jclass klass;
   jmethodID addCallbackBuffer;
+  jmethodID autoFocus;
+  jmethodID cancelAutoFocus;
   jmethodID getCameraInfo;
   jmethodID getNumberOfCameras;
   jmethodID getParameters;
@@ -277,11 +279,23 @@ gst_ah_camera_on_error (JNIEnv * env, jclass klass, jint error,
     cb (error, (gpointer) (gsize) user_data);
 }
 
+static void
+gst_ah_camera_on_auto_focus (JNIEnv * env, jclass klass, jboolean success,
+    jobject camera, jlong callback, jlong user_data)
+{
+  GstAHCAutoFocusCallback cb = (GstAHCAutoFocusCallback) (gsize) callback;
+
+  if (cb)
+    cb (success, (gpointer) (gsize) user_data);
+}
+
 static JNINativeMethod native_methods[] = {
   {"gst_ah_camera_on_preview_frame", "([BLandroid/hardware/Camera;JJ)V",
       (void *) gst_ah_camera_on_preview_frame},
   {"gst_ah_camera_on_error", "(ILandroid/hardware/Camera;JJ)V",
-      (void *) gst_ah_camera_on_error}
+      (void *) gst_ah_camera_on_error},
+  {"gst_ah_camera_on_auto_focus", "(ZLandroid/hardware/Camera;JJ)V",
+      (void *) gst_ah_camera_on_auto_focus}
 };
 
 static gboolean
@@ -292,6 +306,9 @@ _init_classes (void)
   /* android.hardware.Camera */
   GST_DVM_GET_CLASS (android_hardware_camera, "android/hardware/Camera");
   GST_DVM_GET_METHOD (android_hardware_camera, addCallbackBuffer, "([B)V");
+  GST_DVM_GET_METHOD (android_hardware_camera, autoFocus,
+      "(Landroid/hardware/Camera$AutoFocusCallback;)V");
+  GST_DVM_GET_METHOD (android_hardware_camera, cancelAutoFocus, "()V");
   GST_DVM_GET_STATIC_METHOD (android_hardware_camera, getCameraInfo,
       "(ILandroid/hardware/Camera$CameraInfo;)V");
   GST_DVM_GET_STATIC_METHOD (android_hardware_camera, getNumberOfCameras,
@@ -1654,6 +1671,46 @@ gst_ah_camera_add_callback_buffer (GstAHCamera * self, jbyteArray buffer)
   AHC_CALL (, Void, addCallbackBuffer, buffer);
 }
 
+gboolean
+gst_ah_camera_auto_focus (GstAHCamera * self,
+    GstAHCAutoFocusCallback cb, gpointer user_data)
+{
+  JNIEnv *env = gst_dvm_get_env ();
+  jobject object = NULL;
+  gboolean ret = FALSE;
+
+  if (cb) {
+    object = (*env)->NewObject (env,
+        com_gstreamer_gstahccallback.klass,
+        com_gstreamer_gstahccallback.constructor,
+        *((jlong *) & cb), *((jlong *) & user_data));
+    if (!object) {
+      GST_ERROR ("Failed to create callback object");
+      (*env)->ExceptionClear (env);
+      goto done;
+    }
+  }
+
+  AHC_CALL (goto done, Void, autoFocus, object);
+
+  ret = TRUE;
+done:
+  if (object)
+    (*env)->DeleteLocalRef (env, object);
+
+  return ret;
+}
+
+gboolean
+gst_ah_camera_cancel_auto_focus (GstAHCamera * self)
+{
+  JNIEnv *env = gst_dvm_get_env ();
+
+  AHC_CALL (return FALSE, Void, cancelAutoFocus);
+
+  return TRUE;
+}
+
 gboolean
 gst_ah_camera_get_camera_info (gint camera_id, GstAHCCameraInfo * camera_info)
 {

sys/androidcamera/gst-android-hardware-camera.h

@@ -118,11 +118,17 @@ typedef void (*GstAHCErrorCallback) (gint error, gpointer user_data);
 /* android.hardware.Camera.PreviewCallback */
 typedef void (*GstAHCPreviewCallback) (jbyteArray data, gpointer user_data);
 
+/* android.hardware.Camera.AutoFocusCallback */
+typedef void (*GstAHCAutoFocusCallback) (gboolean success, gpointer user_data);
+
 gboolean gst_android_hardware_camera_init (void);
 void gst_android_hardware_camera_deinit (void);
 
 /* android.hardware.Camera */
 void gst_ah_camera_add_callback_buffer (GstAHCamera * self, jbyteArray buffer);
+gboolean gst_ah_camera_auto_focus (GstAHCamera * self,
+    GstAHCAutoFocusCallback cb, gpointer user_data);
+gboolean gst_ah_camera_cancel_auto_focus (GstAHCamera * self);
 gboolean gst_ah_camera_get_camera_info (gint camera_id,
     GstAHCCameraInfo * camera_info);
 gint gst_ah_camera_get_number_of_cameras (void);

sys/androidcamera/gstahcsrc.c

@@ -101,7 +101,8 @@ static void gst_ahc_src_set_autofocus (GstPhotography * photo, gboolean on);
 /* GstAHCSrc */
 static void gst_ahc_src_close (GstAHCSrc * self);
 static void gst_ahc_src_on_preview_frame (jbyteArray data, gpointer user_data);
-static void gst_ahc_src_on_error (int error, gpointer user_data);
+static void gst_ahc_src_on_error (gint error, gpointer user_data);
+static void gst_ahc_src_on_auto_focus (gboolean success, gpointer user_data);
 
 #define NUM_CALLBACK_BUFFERS 5
 
@@ -1262,13 +1263,27 @@ gst_ahc_src_get_capabilities (GstPhotography * photo)
       GST_PHOTOGRAPHY_CAPS_FOCUS;
 }
 
+static void
+gst_ahc_src_on_auto_focus (gboolean success, gpointer user_data)
+{
+  GstAHCSrc *self = GST_AHC_SRC (user_data);
+
+  GST_WARNING_OBJECT (self, "Auto focus completed : %d", success);
+  gst_element_post_message (GST_ELEMENT (self),
+      gst_message_new_custom (GST_MESSAGE_ELEMENT, GST_OBJECT (self),
+          gst_structure_new (GST_PHOTOGRAPHY_AUTOFOCUS_DONE, NULL)));
+}
+
 static void
 gst_ahc_src_set_autofocus (GstPhotography * photo, gboolean on)
 {
   GstAHCSrc *self = GST_AHC_SRC (photo);
 
   if (self->camera) {
-    /* TODO: Call the autofocus and signal when callback is called */
+    if (on)
+      gst_ah_camera_auto_focus (self->camera, gst_ahc_src_on_auto_focus, self);
+    else
+      gst_ah_camera_cancel_auto_focus (self->camera);
   }
 
 }
@@ -1700,7 +1715,7 @@ gst_ahc_src_on_preview_frame (jbyteArray array, gpointer user_data)
 }
 
 static void
-gst_ahc_src_on_error (int error, gpointer user_data)
+gst_ahc_src_on_error (gint error, gpointer user_data)
 {
   GstAHCSrc *self = GST_AHC_SRC (user_data);