avutil/side_data: add EXIF side data type

This commit adds support for the additional side data type
AV_FRAME_DATA_EXIF, which contains a buffer of an EXIF metadata
payload.

Signed-off-by: Leo Izen <leo.izen@gmail.com>

libavutil/frame.h

@@ -254,6 +254,12 @@ enum AVFrameSideDataType {
      * libavutil/tdrdi.h.
      */
     AV_FRAME_DATA_3D_REFERENCE_DISPLAYS,
+
+    /**
+     * Extensible image file format metadata. The payload is a buffer containing
+     * EXIF metadata, starting with either 49 49 2a 00, or 4d 4d 00 2a.
+     */
+     AV_FRAME_DATA_EXIF,
 };
 
 enum AVActiveFormatDescription {

libavutil/side_data.c

@@ -53,6 +53,7 @@ static const AVSideDataDescriptor sd_props[] = {
     [AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT] = { "Ambient viewing environment",                  AV_SIDE_DATA_PROP_GLOBAL },
     [AV_FRAME_DATA_SPHERICAL]                   = { "Spherical Mapping",                            AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
     [AV_FRAME_DATA_ICC_PROFILE]                 = { "ICC profile",                                  AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_EXIF]                        = { "EXIF metadata",                                AV_SIDE_DATA_PROP_GLOBAL },
     [AV_FRAME_DATA_SEI_UNREGISTERED]            = { "H.26[45] User Data Unregistered SEI message",  AV_SIDE_DATA_PROP_MULTI },
     [AV_FRAME_DATA_VIDEO_HINT]                  = { "Encoding video hint",                          AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
     [AV_FRAME_DATA_3D_REFERENCE_DISPLAYS]       = { "3D Reference Displays Information",            AV_SIDE_DATA_PROP_GLOBAL },

libavutil/version.h

@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  60
-#define LIBAVUTIL_VERSION_MINOR   9
+#define LIBAVUTIL_VERSION_MINOR  10
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \