qcam: Cache buffer memory mapping

With the buffer allocator in use it's possible to cache the dmabuf
memory mappings when starting the camera instead of mapping and
unmapping them each time.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/qcam/main_window.h b/src/qcam/main_window.h
index 05cde4ce..04fb9e3e 100644
--- a/src/qcam/main_window.h
+++ b/src/qcam/main_window.h
@@ -71,6 +71,7 @@ private:
 	uint32_t framesCaptured_;
 
 	ViewFinder *viewfinder_;
+	std::map<int, std::pair<void *, unsigned int>> mappedBuffers_;
 };
 
 #endif /* __QCAM_MAIN_WINDOW__ */