Decode atoms with known MP4 UUIDs (Exif, XMP, etc)

drewnoakes · Jan 15, 2020 · 96b7bc1 · 96b7bc1
1 parent 640ad35
commit 96b7bc1
Showing 1 changed file with 62 additions and 4 deletions.
diff --git a/Source/com/drew/metadata/mp4/media/Mp4UuidBoxHandler.java b/Source/com/drew/metadata/mp4/media/Mp4UuidBoxHandler.java
@@ -21,18 +21,58 @@
 package com.drew.metadata.mp4.media;
 
 import com.drew.imaging.mp4.Mp4Handler;
+import com.drew.lang.ByteArrayReader;
+import com.drew.lang.ByteTrie;
 import com.drew.lang.SequentialByteArrayReader;
 import com.drew.lang.SequentialReader;
 import com.drew.metadata.Metadata;
+import com.drew.metadata.exif.ExifReader;
+import com.drew.metadata.iptc.IptcReader;
 import com.drew.metadata.mp4.Mp4BoxTypes;
 import com.drew.metadata.mp4.Mp4Context;
 import com.drew.metadata.mp4.boxes.Box;
 import com.drew.metadata.mp4.boxes.UuidBox;
+import com.drew.metadata.photoshop.PhotoshopReader;
+import com.drew.metadata.xmp.XmpReader;
 
 import java.io.IOException;
 
 public class Mp4UuidBoxHandler extends Mp4Handler<Mp4UuidBoxDirectory>
 {
+    // http://xhelmboyx.tripod.com/formats/mp4-layout.txt
+    // http://fileformats.archiveteam.org/wiki/Boxes/atoms_format#UUID_boxes
+
+    private enum UuidType
+    {
+        Unknown,
+        Exif,                                  // 0537cdab-9d0c-4431-a72a-fa561f2a113e
+        PhotoshopImageResources,               // 2c4c0100-8504-40b9-a03e-562148d6dfeb
+        IptcIim,                               // 33c7a4d2-b81d-4723-a0ba-f1a3e097ad38
+        PiffTrackEncryptionBox,                // 8974dbce-7be7-4c51-84f9-7148f9882554
+        GeoJp2WorldFileBox,                    // 96a9f1f1-dc98-402d-a7ae-d68e34451809
+        PiffSampleEncryptionBox,               // a2394f52-5a9b-4f14-a244-6c427c648df4
+        GeoJp2GeoTiffBox,                      // b14bf8bd-083d-4b43-a5ae-8cd7d5a6ce03
+        Xmp,                                   // be7acfcb-97a9-42e8-9c71-999491e3afac
+        PiffProtectionSystemSpecificHeaderBox, // d08a4f18-10f3-4a82-b6c8-32d8aba183d3
+    }
+
+    private final static ByteTrie<UuidType> _uuidLookup;
+
+    static
+    {
+        _uuidLookup = new ByteTrie<UuidType>();
+        _uuidLookup.setDefaultValue(UuidType.Unknown);
+
+        _uuidLookup.addPath(UuidType.Exif, new byte[] { 0x05, 0x37, (byte)0xcd, (byte)0xab, (byte)0x9d, 0x0c, 0x44, 0x31, (byte)0xa7, 0x2a, (byte)0xfa, 0x56, 0x1f, 0x2a, 0x11, 0x3e });
+        _uuidLookup.addPath(UuidType.PhotoshopImageResources, new byte[] { 0x2c, 0x4c, 0x01, 0x00, (byte)0x85, 0x04, 0x40, (byte)0xb9, (byte)0xa0, 0x3e, 0x56, 0x21, 0x48, (byte)0xd6, (byte)0xdf, (byte)0xeb });
+        _uuidLookup.addPath(UuidType.IptcIim, new byte[] { 0x33, (byte)0xc7, (byte)0xa4, (byte)0xd2, (byte)0xb8, 0x1d, 0x47, 0x23, (byte)0xa0, (byte)0xba, (byte)0xf1, (byte)0xa3, (byte)0xe0, (byte)0x97, (byte)0xad, 0x38 });
+        _uuidLookup.addPath(UuidType.PiffTrackEncryptionBox, new byte[] { (byte)0x89, 0x74, (byte)0xdb, (byte)0xce, 0x7b, (byte)0xe7, 0x4c, 0x51, (byte)0x84, (byte)0xf9, 0x71, 0x48, (byte)0xf9, (byte)0x88, 0x25, 0x54 });
+        _uuidLookup.addPath(UuidType.GeoJp2WorldFileBox, new byte[] { (byte)0x96, (byte)0xa9, (byte)0xf1, (byte)0xf1, (byte)0xdc, (byte)0x98, 0x40, 0x2d, (byte)0xa7, (byte)0xae, (byte)0xd6, (byte)0x8e, 0x34, 0x45, 0x18, 0x09 });
+        _uuidLookup.addPath(UuidType.PiffSampleEncryptionBox, new byte[] { (byte)0xa2, 0x39, 0x4f, 0x52, 0x5a, (byte)0x9b, 0x4f, 0x14, (byte)0xa2, 0x44, 0x6c, 0x42, 0x7c, 0x64, (byte)0x8d, (byte)0xf4 });
+        _uuidLookup.addPath(UuidType.GeoJp2GeoTiffBox, new byte[] { (byte)0xb1, 0x4b, (byte)0xf8, (byte)0xbd, 0x08, 0x3d, 0x4b, 0x43, (byte)0xa5, (byte)0xae, (byte)0x8c, (byte)0xd7, (byte)0xd5, (byte)0xa6, (byte)0xce, 0x03 });
+        _uuidLookup.addPath(UuidType.Xmp, new byte[] { (byte)0xbe, 0x7a, (byte)0xcf, (byte)0xcb, (byte)0x97, (byte)0xa9, 0x42, (byte)0xe8, (byte)0x9c, 0x71, (byte)0x99, (byte)0x94, (byte)0x91, (byte)0xe3, (byte)0xaf, (byte)0xac });
+        _uuidLookup.addPath(UuidType.PiffProtectionSystemSpecificHeaderBox, new byte[] { (byte)0xd0, (byte)0x8a, 0x4f, 0x18, 0x10, (byte)0xf3, 0x4a, (byte)0x82, (byte)0xb6, (byte)0xc8, 0x32, (byte)0xd8, (byte)0xab, (byte)0xa1, (byte)0x83, (byte)0xd3 });
+    }
 
     public Mp4UuidBoxHandler(Metadata metadata)
     {
@@ -60,10 +100,28 @@ protected boolean shouldAcceptContainer(Box box)
     @Override
     public Mp4Handler processBox(Box box, byte[] payload, Mp4Context context) throws IOException
     {
-        if (payload != null) {
-            SequentialReader reader = new SequentialByteArrayReader(payload);
-            UuidBox userBox = new UuidBox(reader, box);
-            userBox.addMetadata(directory);
+        if (payload != null && payload.length >= 16) {
+            UuidType type = _uuidLookup.find(payload);
+
+            switch (type) {
+                case Exif:
+                    new ExifReader().extract(new ByteArrayReader(payload, 16), metadata, 0, directory);
+                    break;
+                case IptcIim:
+                    new IptcReader().extract(new SequentialByteArrayReader(payload, 16), metadata, payload.length - 16, directory);
+                    break;
+                case PhotoshopImageResources:
+                    new PhotoshopReader().extract(new SequentialByteArrayReader(payload, 16), payload.length - 16,  metadata, directory);
+                    break;
+                case Xmp:
+                    new XmpReader().extract(payload, 16, payload.length - 16,  metadata, directory);
+                    break;
+                default:
+                    SequentialReader reader = new SequentialByteArrayReader(payload);
+                    UuidBox userBox = new UuidBox(reader, box);
+                    userBox.addMetadata(directory);
+                    break;
+            }
         }
 
         return this;