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libcamera: controls: Expose raw data in ControlValue

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Add a data() function to the ControlValue class to expose the raw data
stored by the class as a Span<const uint8_t>. This will be useful to
simplify the serialization of ControlValue instances.

The size computation for the raw data is moved from the
ControlSerializer, which is updated accordingly to use the data()
function in order to access the size. Simplification of the
ControlSerializer will happen in a subsequent change.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2020-02-15 23:59:54 +02:00
parent 954bf1f656
commit cd0f7929ec
3 changed files with 27 additions and 12 deletions
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3
include/libcamera/controls.h
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@ -12,6 +12,8 @@
#include <string>
#include <unordered_map>
#include <libcamera/span.h>
namespace libcamera {
class ControlValidator;
@ -65,6 +67,7 @@ public:
ControlType type() const { return type_; }
bool isNone() const { return type_ == ControlTypeNone; }
Span<const uint8_t> data() const;
std::string toString() const;