ExifInterface: add support for reading metadata from RAW images

This CL depends on piex (github.com/google/piex),
which is owned by Google Photos's RAW team.

piex is capable of reading EXIF data that contains
metadata, and finding the positions in an image of
thumbnail and preview images from RAW images.

piex supports DNG, CR2, NEF, NRW, ARW, RW2, ORF
and RAF image file formats.

ExifInterface gets thumbnail and metadata information
from the above RAW image formats via piex.

Bug: 26177215
Change-Id: I529f8032bcb2a9d3d9e857ff1365a26a4f040066

1 files changed, 6 insertions, 0 deletions

diff --git a/media/jni/android_media_MediaPlayer.cpp b/media/jni/android_media_MediaPlayer.cpp
index be3672968398..e9d62dec80a4 100644
--- a/media/jni/android_media_MediaPlayer.cpp
+++ b/media/jni/android_media_MediaPlayer.cpp
@@ -1088,6 +1088,7 @@ static int register_android_media_MediaPlayer(JNIEnv *env)
     return AndroidRuntime::registerNativeMethods(env,
                 "android/media/MediaPlayer", gMethods, NELEM(gMethods));
 }
+extern int register_android_media_ExifInterface(JNIEnv *env);
 extern int register_android_media_ImageReader(JNIEnv *env);
 extern int register_android_media_ImageWriter(JNIEnv *env);
 extern int register_android_media_Crypto(JNIEnv *env);
@@ -1219,6 +1220,11 @@ jint JNI_OnLoad(JavaVM* vm, void* /* reserved */)
         goto bail;
     }
 
+    if (register_android_media_ExifInterface(env) < 0) {
+        ALOGE("ERROR: ExifInterface native registration failed");
+        goto bail;
+    }
+
     /* success -- return valid version number */
     result = JNI_VERSION_1_4;