"Regular" version now attempts to set desired camera exposure settings

git-svn-id: https://zxing.googlecode.com/svn/trunk@310 59b500cc-1b3d-0410-9834-0bbf25fbcc57

javame/src-basic/com/google/zxing/client/j2me/AdvancedMultimediaManager.java

@@ -17,7 +17,6 @@
 package com.google.zxing.client.j2me;
 
 import javax.microedition.media.Controllable;
-import javax.microedition.media.MediaException;
 
 /**
  * <p>See this exact same class under the "src" source root for a full explanation.
@@ -34,7 +33,7 @@ final class AdvancedMultimediaManager {
 
   // These signatures must match those in the other class exactly
 
-  static void setFocus(Controllable player) throws MediaException {
+  static void setFocus(Controllable player) {
     // do nothing
   }
 
@@ -42,4 +41,8 @@ final class AdvancedMultimediaManager {
     // do nothing
   }
 
+  static void setExposure(Controllable player) {
+    // do nothing
+  }
+
 }

javame/src/com/google/zxing/client/j2me/AdvancedMultimediaManager.java

@@ -16,6 +16,7 @@
 
 package com.google.zxing.client.j2me;
 
+import javax.microedition.amms.control.camera.ExposureControl;
 import javax.microedition.amms.control.camera.FocusControl;
 import javax.microedition.amms.control.camera.ZoomControl;
 import javax.microedition.media.Controllable;
@@ -38,30 +39,31 @@ final class AdvancedMultimediaManager {
   private static final int NO_ZOOM = 100;
   private static final int MAX_ZOOM = 200;
   private static final long FOCUS_TIME_MS = 750L;
+  private static final String DESIRED_METERING = "center-weighted";
 
   private AdvancedMultimediaManager() {
     // do nothing
   }
 
-  static void setFocus(Controllable player) throws MediaException {
+  static void setFocus(Controllable player) {
     FocusControl focusControl = (FocusControl)
         player.getControl("javax.microedition.amms.control.camera.FocusControl");
     if (focusControl != null) {
-      if (focusControl.isMacroSupported() && !focusControl.getMacro()) {
-        focusControl.setMacro(true);
-      }
-      if (focusControl.isAutoFocusSupported()) {
-        focusControl.setFocus(FocusControl.AUTO);
-        try {
-          Thread.sleep(FOCUS_TIME_MS); // let it focus...
-        } catch (InterruptedException ie) {
-          // continue
+      try {
+        if (focusControl.isMacroSupported() && !focusControl.getMacro()) {
+          focusControl.setMacro(true);
         }
-        try {
+        if (focusControl.isAutoFocusSupported()) {
+          focusControl.setFocus(FocusControl.AUTO);
+          try {
+            Thread.sleep(FOCUS_TIME_MS); // let it focus...
+          } catch (InterruptedException ie) {
+            // continue
+          }
           focusControl.setFocus(FocusControl.AUTO_LOCK);
-        } catch (MediaException me) {
-          // continue; some phones like the SE K850 don't support this?
         }
+      } catch (MediaException me) {
+        // continue
       }
     }
   }
@@ -84,4 +86,37 @@ final class AdvancedMultimediaManager {
     }
   }
 
+  static void setExposure(Controllable player) {
+    ExposureControl exposureControl =
+        (ExposureControl) player.getControl("javax.microedition.amms.control.camera.ExposureControl");
+    if (exposureControl != null) {
+
+      int[] supportedISOs = exposureControl.getSupportedISOs();
+      if (supportedISOs != null && supportedISOs.length > 0) {
+        int maxISO = Integer.MIN_VALUE;
+        for (int i = 0; i < supportedISOs.length; i++) {
+          if (supportedISOs[i] > maxISO) {
+            maxISO = supportedISOs[i];
+          }
+        }
+        try {
+          exposureControl.setISO(maxISO);
+        } catch (MediaException me) {
+          // continue
+        }
+      }
+
+      String[] supportedMeterings = exposureControl.getSupportedLightMeterings();
+      if (supportedMeterings != null) {
+        for (int i = 0; i < supportedMeterings.length; i++) {
+          if (DESIRED_METERING.equals(supportedMeterings[i])) {
+            exposureControl.setLightMetering(DESIRED_METERING);
+            break;
+          }
+        }
+      }
+
+    }
+  }
+
 }

javame/src/com/google/zxing/client/j2me/ZXingMIDlet.java

@@ -71,6 +71,7 @@ public final class ZXingMIDlet extends MIDlet {
       player = createPlayer();
       player.realize();
       AdvancedMultimediaManager.setZoom(player);
+      AdvancedMultimediaManager.setExposure(player);
       videoControl = (VideoControl) player.getControl("VideoControl");
       canvas = new VideoCanvas(this);
       canvas.setFullScreenMode(true);