Camera2: implement exposure compensation settings in video mode

Change-Id: I83a2675e109dc7924cdd9240b26051ac218f532a

3 files changed, 26 insertions, 0 deletions

diff --git a/src/com/android/camera/VideoMenu.java b/src/com/android/camera/VideoMenu.java
index 971372bf8..330fa2ace 100644
--- a/src/com/android/camera/VideoMenu.java
+++ b/src/com/android/camera/VideoMenu.java
@@ -114,6 +114,7 @@ public class VideoMenu extends MenuController
                 CameraSettings.KEY_VIDEO_QUALITY,
                 CameraSettings.KEY_RECORD_LOCATION,
                 CameraSettings.KEY_CAMERA_SAVEPATH,
+                CameraSettings.KEY_EXPOSURE,
                 CameraSettings.KEY_WHITE_BALANCE,
                 CameraSettings.KEY_VIDEO_HIGH_FRAME_RATE,
                 CameraSettings.KEY_DIS
@@ -123,6 +124,7 @@ public class VideoMenu extends MenuController
                 CameraSettings.KEY_VIDEO_QUALITY,
                 CameraSettings.KEY_RECORD_LOCATION,
                 CameraSettings.KEY_CAMERA_SAVEPATH,
+                CameraSettings.KEY_EXPOSURE,
                 CameraSettings.KEY_WHITE_BALANCE,
                 CameraSettings.KEY_FACE_DETECTION,
                 CameraSettings.KEY_VIDEO_HIGH_FRAME_RATE,
diff --git a/src/com/android/camera/VideoModule.java b/src/com/android/camera/VideoModule.java
index c827d0e00..fcf966ce6 100644
--- a/src/com/android/camera/VideoModule.java
+++ b/src/com/android/camera/VideoModule.java
@@ -501,6 +501,8 @@ public class VideoModule implements CameraModule,
 
         mPreferences.setLocalId(mActivity, mCameraId);
         CameraSettings.upgradeLocalPreferences(mPreferences.getLocal());
+        // we need to reset exposure for the preview
+        resetExposureCompensation();
 
         mOrientationManager = new OrientationManager(mActivity);
 
@@ -1071,6 +1073,16 @@ public class VideoModule implements CameraModule,
                 ". mDesiredPreviewHeight=" + mDesiredPreviewHeight);
     }
 
+    private void resetExposureCompensation() {
+        String value = mPreferences.getString(CameraSettings.KEY_EXPOSURE,
+                CameraSettings.EXPOSURE_DEFAULT_VALUE);
+        if (!CameraSettings.EXPOSURE_DEFAULT_VALUE.equals(value)) {
+            Editor editor = mPreferences.edit();
+            editor.putString(CameraSettings.KEY_EXPOSURE, "0");
+            editor.apply();
+        }
+    }
+
     void setPreviewFrameLayoutCameraOrientation(){
         CameraInfo info = CameraHolder.instance().getCameraInfo()[mCameraId];
 
@@ -1124,6 +1136,7 @@ public class VideoModule implements CameraModule,
         if(mWasMute != mIsMute) {
             setMute(mIsMute, false);
         }
+        resetExposureCompensation();
         showVideoSnapshotUI(false);
         installIntentFilter();
 
@@ -2707,6 +2720,15 @@ public class VideoModule implements CameraModule,
         if (CameraUtil.isSupported(mParameters, "video-size")) {
             mParameters.set("video-size", recordSize);
         }
+        // Set exposure compensation
+        int value = CameraSettings.readExposure(mPreferences);
+        int max = mParameters.getMaxExposureCompensation();
+        int min = mParameters.getMinExposureCompensation();
+        if (value >= min && value <= max) {
+            mParameters.setExposureCompensation(value);
+        } else {
+            Log.w(TAG, "invalid exposure range: " + value);
+        }
         // Set white balance parameter.
         String whiteBalance = mPreferences.getString(
                 CameraSettings.KEY_WHITE_BALANCE,
diff --git a/src/com/android/camera/VideoUI.java b/src/com/android/camera/VideoUI.java
index 747999b60..3517372ed 100755
--- a/src/com/android/camera/VideoUI.java
+++ b/src/com/android/camera/VideoUI.java
@@ -718,6 +718,8 @@ public class VideoUI implements PieRenderer.PieListener,
     }
 
     public void updateOnScreenIndicators(Parameters param, ComboPreferences prefs) {
+      mOnScreenIndicators.updateExposureOnScreenIndicator(param,
+              CameraSettings.readExposure(prefs));
       mOnScreenIndicators.updateFlashOnScreenIndicator(param.getFlashMode());
       boolean location = RecordLocationPreference.get(prefs, CameraSettings.KEY_RECORD_LOCATION);
       mOnScreenIndicators.updateLocationIndicator(location);