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android: jpeg: post_processor_jpeg: Embed thumbnail into Exif metadata

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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>
This commit is contained in:
Umang Jain 2020-10-28 02:54:47 +05:30 • committed by Kieran Bingham
parent f0421988dc
commit b053384ffa
4 changed files with 77 additions and 2 deletions
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8
src/android/jpeg/post_processor_jpeg.h
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@ -8,12 +8,13 @@
#define __ANDROID_POST_PROCESSOR_JPEG_H__
#include "../post_processor.h"
#include "encoder_libjpeg.h"
#include "thumbnailer.h"
#include <libcamera/geometry.h>
#include "libcamera/internal/buffer.h"
class Encoder;
class CameraDevice;
class PostProcessorJpeg : public PostProcessor
@ -28,9 +29,14 @@ public:
CameraMetadata *metadata) override;
private:
void generateThumbnail(const libcamera::FrameBuffer &source,
std::vector<unsigned char> *thumbnail);
CameraDevice *const cameraDevice_;
std::unique_ptr<Encoder> encoder_;
libcamera::Size streamSize_;
EncoderLibJpeg thumbnailEncoder_;
Thumbnailer thumbnailer_;
};
#endif /* __ANDROID_POST_PROCESSOR_JPEG_H__ */