From b053384ffab467ed016019bbcf8121a6f9e48fed Mon Sep 17 00:00:00 2001
From: Umang Jain <email@uajain.com>
Date: Wed, 28 Oct 2020 02:54:47 +0530
Subject: android: jpeg: post_processor_jpeg: Embed thumbnail into Exif
 metadata

Embed a Jpeg-encoded thumbnail into Exif metadata using the Thumbnailer
class that got introduced.

Introduce a helper function in Exif class for setting the thumbnail
data.

Signed-off-by: Umang Jain <email@uajain.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
[Kieran: Add todo comment, and Compression enum]
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 src/android/jpeg/exif.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/android/jpeg/exif.h')

diff --git a/src/android/jpeg/exif.h b/src/android/jpeg/exif.h
index 12c27b6f..5cab4559 100644
--- a/src/android/jpeg/exif.h
+++ b/src/android/jpeg/exif.h
@@ -21,11 +21,18 @@ public:
 	Exif();
 	~Exif();
 
+	enum Compression {
+		None = 1,
+		JPEG = 6,
+	};
+
 	void setMake(const std::string &make);
 	void setModel(const std::string &model);
 
 	void setOrientation(int orientation);
 	void setSize(const libcamera::Size &size);
+	void setThumbnail(libcamera::Span<const unsigned char> thumbnail,
+			  Compression compression);
 	void setTimestamp(time_t timestamp);
 
 	libcamera::Span<const uint8_t> data() const { return { exifData_, size_ }; }
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