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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-02-28 17:01:43 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-03-23 16:45:16 +0200
commit8daf20485b90af2065e3db0e3fd0cd5b72fd7ac4 (patch)
tree7d01521858283e8da927f2b429e3ea5b7d4f6bb9 /test/v4l2_videodevice/capture_async.cpp
parent9ab024f7c27d9b6b3ab433502eab02d4a29a3da4 (diff)
libcamera: controls: Add zero-copy set API for ControlValue
Extend the ControlValue class with a reserve() function to set the value without actually copying data, and a non-const data() function that allows writing data directly to the ControlValue storage. This allows allocating memory directly in ControlValue, potentially removing a data copy. Note that this change was implemented before ByteStreamBuffer gained the zero-copy read() variant, and doesn't actually save a copy in the control serializer. It however still simplifies ControlSerializer::loadControlValue(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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