1 files changed, 74 insertions, 0 deletions
diff --git a/src/com/android/camera/Exif.java b/src/com/android/camera/Exif.java
new file mode 100644
index 000000000..605556599
--- /dev/null
+++ b/src/com/android/camera/Exif.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.camera;
+
+import android.util.Log;
+
+import com.android.gallery3d.exif.ExifInvalidFormatException;
+import com.android.gallery3d.exif.ExifParser;
+import com.android.gallery3d.exif.ExifTag;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class Exif {
+    private static final String TAG = "CameraExif";
+
+    // Returns the degrees in clockwise. Values are 0, 90, 180, or 270.
+    public static int getOrientation(byte[] jpeg) {
+        if (jpeg == null) return 0;
+
+        InputStream is = new ByteArrayInputStream(jpeg);
+
+        try {
+            ExifParser parser = ExifParser.parse(is, ExifParser.OPTION_IFD_0);
+            int event = parser.next();
+            while(event != ExifParser.EVENT_END) {
+                if (event == ExifParser.EVENT_NEW_TAG) {
+                    ExifTag tag = parser.getTag();
+                    if (tag.getTagId() == ExifTag.TAG_ORIENTATION &&
+                            tag.hasValue()) {
+                        int orient = (int) tag.getValueAt(0);
+                        switch (orient) {
+                            case ExifTag.Orientation.TOP_LEFT:
+                                return 0;
+                            case ExifTag.Orientation.BOTTOM_LEFT:
+                                return 180;
+                            case ExifTag.Orientation.RIGHT_TOP:
+                                return 90;
+                            case ExifTag.Orientation.RIGHT_BOTTOM:
+                                return 270;
+                            default:
+                                Log.i(TAG, "Unsupported orientation");
+                                return 0;
+                        }
+                    }
+                }
+                event = parser.next();
+            }
+            Log.i(TAG, "Orientation not found");
+            return 0;
+        } catch (IOException e) {
+            Log.w(TAG, "Failed to read EXIF orientation", e);
+            return 0;
+        } catch (ExifInvalidFormatException e) {
+            Log.w(TAG, "Failed to read EXIF orientation", e);
+            return 0;
+        }
+    }
+}