SnapdragonCamera: Add zoom option to developer option for camera2

For automation testing, we need a way to adjust the zoom without
using the pinch gesture. Therefore, adding zoom option preference
to the developer option.

CRs-Fixed: 2008116
Change-Id: Ie459dbbb28051d49f8e4951d6adb112d03cf22f6

3 files changed, 32 insertions, 1 deletions

diff --git a/src/com/android/camera/CaptureModule.java b/src/com/android/camera/CaptureModule.java
index e4c162a5b..1bfc38be4 100755
--- a/src/com/android/camera/CaptureModule.java
+++ b/src/com/android/camera/CaptureModule.java
@@ -2168,7 +2168,7 @@ public class CaptureModule implements CameraModule, PhotoController,
             mState[i] = STATE_PREVIEW;
         }
         mLongshotActive = false;
-        mZoomValue = 1.0f;
+        updateZoom();
         updatePreviewSurfaceReadyState(false);
     }
 
@@ -3006,6 +3006,16 @@ public class CaptureModule implements CameraModule, PhotoController,
         }
     }
 
+    private void updateZoom() {
+        String zoomStr = mSettingsManager.getValue(SettingsManager.KEY_ZOOM);
+        int zoom = Integer.parseInt(zoomStr);
+        if ( zoom !=0 ) {
+            mZoomValue = (float)zoom;
+        }else{
+            mZoomValue = 1.0f;
+        }
+    }
+
     private boolean startRecordingVideo(final int cameraId) {
         if (null == mCameraDevice[cameraId]) {
             return false;
diff --git a/src/com/android/camera/SettingsActivity.java b/src/com/android/camera/SettingsActivity.java
index 00f42daa4..201dda1c8 100644
--- a/src/com/android/camera/SettingsActivity.java
+++ b/src/com/android/camera/SettingsActivity.java
@@ -208,6 +208,7 @@ public class SettingsActivity extends PreferenceActivity {
         updatePreference(SettingsManager.KEY_EXPOSURE);
         updatePreference(SettingsManager.KEY_VIDEO_HIGH_FRAME_RATE);
         updatePreference(SettingsManager.KEY_VIDEO_ENCODER);
+        updatePreference(SettingsManager.KEY_ZOOM);
 
         Map<String, SettingsManager.Values> map = mSettingsManager.getValuesMap();
         Set<Map.Entry<String, SettingsManager.Values>> set = map.entrySet();
diff --git a/src/com/android/camera/SettingsManager.java b/src/com/android/camera/SettingsManager.java
index d8c36b16b..d9184d579 100644
--- a/src/com/android/camera/SettingsManager.java
+++ b/src/com/android/camera/SettingsManager.java
@@ -144,6 +144,8 @@ public class SettingsManager implements ListMenu.SettingsListener {
     public static final String KEY_HISTOGRAM = "pref_camera2_histogram_key";
     public static final String KEY_HDR = "pref_camera2_hdr_key";
     public static final String KEY_SAVERAW = "pref_camera2_saveraw_key";
+    public static final String KEY_ZOOM = "pref_camera2_zoom_key";
+
     public static final HashMap<String, Integer> KEY_ISO_INDEX = new HashMap<String, Integer>();
 
     private static final String TAG = "SnapCam_SettingsManager";
@@ -607,6 +609,7 @@ public class SettingsManager implements ListMenu.SettingsListener {
         ListPreference antiBandingLevel = mPreferenceGroup.findPreference(KEY_ANTI_BANDING_LEVEL);
         ListPreference histogram = mPreferenceGroup.findPreference(KEY_HISTOGRAM);
         ListPreference hdr = mPreferenceGroup.findPreference(KEY_HDR);
+        ListPreference zoom = mPreferenceGroup.findPreference(KEY_ZOOM);
 
         if (whiteBalance != null) {
             if (filterUnsupportedOptions(whiteBalance, getSupportedWhiteBalanceModes(cameraId))) {
@@ -744,6 +747,13 @@ public class SettingsManager implements ListMenu.SettingsListener {
             removePreference(mPreferenceGroup, KEY_SELFIE_FLASH);
             removePreference(mPreferenceGroup, KEY_SELFIEMIRROR);
         }
+
+        if ( zoom != null ) {
+            if (filterUnsupportedOptions(zoom,
+                    getSupportedZoomLevel(cameraId))) {
+                mFilteredKeys.add(zoom.getKey());
+            }
+        }
     }
 
     private void runTimeUpdateDependencyOptions(ListPreference pref) {
@@ -1252,6 +1262,16 @@ public class SettingsManager implements ListMenu.SettingsListener {
         return modes;
     }
 
+    private  List<String> getSupportedZoomLevel(int cameraId) {
+        float maxZoom = mCharacteristics.get(cameraId).get(CameraCharacteristics
+                .SCALER_AVAILABLE_MAX_DIGITAL_ZOOM);
+        ArrayList<String> supported = new ArrayList<String>();
+        for (int zoomLevel = 0; zoomLevel <= maxZoom; zoomLevel++) {
+            supported.add(String.valueOf(zoomLevel));
+        }
+        return supported;
+    }
+
     private void resetIfInvalid(ListPreference pref) {
         // Set the value to the first entry if it is invalid.
         String value = pref.getValue();