android: jpeg: exif: Expand setString to support different encodings

GPSProcessingMethod and UserComment in EXIF tags can be in UTF-16.
Expand setString to take an encoding when the field type is undefined.
Update callers accordingly.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/src/android/jpeg/exif.h b/src/android/jpeg/exif.h
index 5cab4559..8b84165b 100644
--- a/src/android/jpeg/exif.h
+++ b/src/android/jpeg/exif.h
@@ -26,6 +26,12 @@ public:
 		JPEG = 6,
 	};
 
+	enum StringEncoding {
+		NoEncoding = 0,
+		ASCII = 1,
+		Unicode = 2,
+	};
+
 	void setMake(const std::string &make);
 	void setModel(const std::string &model);
 
@@ -46,9 +52,12 @@ private:
 	void setShort(ExifIfd ifd, ExifTag tag, uint16_t item);
 	void setLong(ExifIfd ifd, ExifTag tag, uint32_t item);
 	void setString(ExifIfd ifd, ExifTag tag, ExifFormat format,
-		       const std::string &item);
+		       const std::string &item,
+		       StringEncoding encoding = NoEncoding);
 	void setRational(ExifIfd ifd, ExifTag tag, ExifRational item);
 
+	std::u16string utf8ToUtf16(const std::string &str);
+
 	bool valid_;
 
 	ExifData *data_;