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Diffstat (limited to 'photoviewer/src/com/android/ex/photo/util/Exif.java')
-rw-r--r--photoviewer/src/com/android/ex/photo/util/Exif.java137
1 files changed, 0 insertions, 137 deletions
diff --git a/photoviewer/src/com/android/ex/photo/util/Exif.java b/photoviewer/src/com/android/ex/photo/util/Exif.java
deleted file mode 100644
index 743b896..0000000
--- a/photoviewer/src/com/android/ex/photo/util/Exif.java
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * 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.ex.photo.util;
-
-import android.util.Log;
-
-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;
- }
-
- int offset = 0;
- int length = 0;
-
- // ISO/IEC 10918-1:1993(E)
- while (offset + 3 < jpeg.length && (jpeg[offset++] & 0xFF) == 0xFF) {
- int marker = jpeg[offset] & 0xFF;
-
- // Check if the marker is a padding.
- if (marker == 0xFF) {
- continue;
- }
- offset++;
-
- // Check if the marker is SOI or TEM.
- if (marker == 0xD8 || marker == 0x01) {
- continue;
- }
- // Check if the marker is EOI or SOS.
- if (marker == 0xD9 || marker == 0xDA) {
- break;
- }
-
- // Get the length and check if it is reasonable.
- length = pack(jpeg, offset, 2, false);
- if (length < 2 || offset + length > jpeg.length) {
- Log.e(TAG, "Invalid length");
- return 0;
- }
-
- // Break if the marker is EXIF in APP1.
- if (marker == 0xE1 && length >= 8 &&
- pack(jpeg, offset + 2, 4, false) == 0x45786966 &&
- pack(jpeg, offset + 6, 2, false) == 0) {
- offset += 8;
- length -= 8;
- break;
- }
-
- // Skip other markers.
- offset += length;
- length = 0;
- }
-
- // JEITA CP-3451 Exif Version 2.2
- if (length > 8) {
- // Identify the byte order.
- int tag = pack(jpeg, offset, 4, false);
- if (tag != 0x49492A00 && tag != 0x4D4D002A) {
- Log.e(TAG, "Invalid byte order");
- return 0;
- }
- boolean littleEndian = (tag == 0x49492A00);
-
- // Get the offset and check if it is reasonable.
- int count = pack(jpeg, offset + 4, 4, littleEndian) + 2;
- if (count < 10 || count > length) {
- Log.e(TAG, "Invalid offset");
- return 0;
- }
- offset += count;
- length -= count;
-
- // Get the count and go through all the elements.
- count = pack(jpeg, offset - 2, 2, littleEndian);
- while (count-- > 0 && length >= 12) {
- // Get the tag and check if it is orientation.
- tag = pack(jpeg, offset, 2, littleEndian);
- if (tag == 0x0112) {
- // We do not really care about type and count, do we?
- int orientation = pack(jpeg, offset + 8, 2, littleEndian);
- switch (orientation) {
- case 1:
- return 0;
- case 3:
- return 180;
- case 6:
- return 90;
- case 8:
- return 270;
- }
- Log.i(TAG, "Unsupported orientation");
- return 0;
- }
- offset += 12;
- length -= 12;
- }
- }
-
- Log.i(TAG, "Orientation not found");
- return 0;
- }
-
- private static int pack(byte[] bytes, int offset, int length,
- boolean littleEndian) {
- int step = 1;
- if (littleEndian) {
- offset += length - 1;
- step = -1;
- }
-
- int value = 0;
- while (length-- > 0) {
- value = (value << 8) | (bytes[offset] & 0xFF);
- offset += step;
- }
- return value;
- }
-}