SnapdragonCamera: Add support for outputting MPO format files

Add support for generating MPO formatted files from the application
layer.

CRs-Fixed: 993611
Change-Id: I9a78d33e1d80b7da748f9bc75446f49172342078

1 files changed, 126 insertions, 0 deletions

diff --git a/src/com/android/camera/mpo/MpoIfdData.java b/src/com/android/camera/mpo/MpoIfdData.java
new file mode 100644
index 000000000..8e422944a
--- /dev/null
+++ b/src/com/android/camera/mpo/MpoIfdData.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ * Not a contribution.
+ *
+ * Copyright (C) 2012 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.mpo;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This class stores all the tags in an MP Index IFD.
+ */
+public class MpoIfdData {
+    public static final int TYPE_MP_INDEX_IFD = 1;
+    public static final int TYPE_MP_ATTRIB_IFD = 2;
+    public static final byte[] MP_FORMAT_VER_VALUE = { 0x30, 0x31, 0x30, 0x30 };
+
+    private final int mIfdId;
+    private final Map<Short, MpoTag> mTags = new HashMap<Short, MpoTag>();
+    private int mOffsetToNextIfd = 0;
+
+    /**
+     * Creates an empty MpIndexIfdData
+     */
+    public MpoIfdData(int ifdId) {
+        mIfdId = ifdId;
+    }
+
+    /**
+     * Get a array the contains all {@link MpoTag} in this IFD.
+     */
+    protected MpoTag[] getAllTags() {
+        return mTags.values().toArray(new MpoTag[mTags.size()]);
+    }
+
+    /**
+     * Gets the {@link MpoTag} with given tag id. Return null if there is no
+     * such tag.
+     */
+    protected MpoTag getTag(short tagId) {
+        return mTags.get(tagId);
+    }
+
+    /**
+     * Adds or replaces a {@link MpoTag}.
+     */
+    protected MpoTag setTag(MpoTag tag) {
+        tag.setIfd(mIfdId);
+        return mTags.put(tag.getTagId(), tag);
+    }
+
+    protected boolean checkCollision(short tagId) {
+        return mTags.get(tagId) != null;
+    }
+
+    /**
+     * Removes the tag of the given ID
+     */
+    protected void removeTag(short tagId) {
+        mTags.remove(tagId);
+    }
+
+    /**
+     * Gets the tags count in the IFD.
+     */
+    protected int getTagCount() {
+        return mTags.size();
+    }
+
+    /**
+     * Sets the offset of next IFD.
+     */
+    protected void setOffsetToNextIfd(int offset) {
+        mOffsetToNextIfd = offset;
+    }
+
+    /**
+     * Gets the offset of next IFD.
+     */
+    protected int getOffsetToNextIfd() {
+        return mOffsetToNextIfd;
+    }
+
+    /**
+     * Returns true if all tags in this two IFDs are equal. Note that tags of
+     * IFD offset will be ignored.
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (obj instanceof MpoIfdData) {
+            MpoIfdData data = (MpoIfdData) obj;
+            if (data.getTagCount() == getTagCount()) {
+                MpoTag[] tags = data.getAllTags();
+                for (MpoTag tag : tags) {
+                    MpoTag tag2 = mTags.get(tag.getTagId());
+                    if (!tag.equals(tag2)) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+}