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Add and use an operation to assign to Buffer representing external memory locations an index at queueRequest() time. The index is used to identify the memory buffer to be queued to the video device once the buffer will be queued in a Request. In order to minimize relocations in the V4L2 backend, this method provides a best-effort caching mechanisms that attempts to reuse BufferMemory previously mapped to the buffer's dmabuf file descriptors, if any. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> |
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