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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-09-02 04:29:03 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-09-07 19:18:28 +0300
commit9df775c7574520632547c2f4db236b7d84f6e3c3 (patch)
treef3549960d4cf5a452cbe53f81fdc9b0bcdea0aae /Documentation/docs.rst
parent0f4d81c2bf40b1aba07dc5ef66aaa7484496eedf (diff)
libcamera: framebuffer: Allocate metadata planes at construction time
The metadata planes are allocated by V4L2VideoDevice when dequeuing a buffer. This causes the metadata planes to only be allocated after a buffer gets dequeued, and doesn't provide any strong guarantee that their number matches the number of FrameBuffer planes. The lack of this invariant makes the FrameBuffer class fragile. As a first step towards fixing this, allocate the metadata planes when the FrameBuffer is constructed. The FrameMetadata API should be further improved by preventing a change in the number of planes. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
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