android: jpeg: Support an initial set of EXIF metadata tags
Create a Exif object with various metadata tags set, just before the encoder starts to encode the frame. The object is passed directly as libcamera::Span<> to make sure EXIF tags can be set in a single place i.e. in CameraDevice and the encoder only has the job to write the data in the final output. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Umang Jain <email@uajain.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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6 changed files with 88 additions and 4 deletions
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@ -24,6 +24,7 @@
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#include "system/graphics.h"
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#include "jpeg/encoder_libjpeg.h"
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#include "jpeg/exif.h"
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using namespace libcamera;
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@ -1439,7 +1440,23 @@ void CameraDevice::requestComplete(Request *request)
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continue;
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}
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int jpeg_size = encoder->encode(buffer, mapped.maps()[0]);
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/* Set EXIF metadata for various tags. */
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Exif exif;
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/* \todo Set Make and Model from external vendor tags. */
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exif.setMake("libcamera");
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exif.setModel("cameraModel");
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exif.setOrientation(orientation_);
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exif.setSize(cameraStream->size);
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/*
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* We set the frame's EXIF timestamp as the time of encode.
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* Since the precision we need for EXIF timestamp is only one
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* second, it is good enough.
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*/
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exif.setTimestamp(std::time(nullptr));
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if (exif.generate() != 0)
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LOG(HAL, Error) << "Failed to generate valid EXIF data";
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int jpeg_size = encoder->encode(buffer, mapped.maps()[0], exif.data());
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if (jpeg_size < 0) {
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LOG(HAL, Error) << "Failed to encode stream image";
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status = CAMERA3_BUFFER_STATUS_ERROR;
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