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libcamera: buffer: Store Request reference in Buffer

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Add to the Buffer class methods to set and retrieve a reference to the
Request instance the buffer is part of.

As buffers outlive the Request they are associated with, the reference
is only temporary valid during the buffer completion interval (from when
the buffer gets queued to Camera for processing, until it gets marked as
completed).

Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Jacopo Mondi 2019-04-09 11:27:29 +02:00
parent 0527ba92ad
commit ee027781b4
3 changed files with 33 additions and 1 deletions
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6
include/libcamera/buffer.h
View file

@ -13,6 +13,7 @@
namespace libcamera {
class BufferPool;
class Request;
class Plane final
{
@ -52,14 +53,18 @@ public:
unsigned int sequence() const { return sequence_; }
Status status() const { return status_; }
std::vector<Plane> &planes() { return planes_; }
Request *request() const { return request_; }
private:
friend class BufferPool;
friend class PipelineHandler;
friend class Request;
friend class V4L2Device;
void cancel();
void setRequest(Request *request) { request_ = request; }
unsigned int index_;
unsigned int bytesused_;
uint64_t timestamp_;
@ -67,6 +72,7 @@ private:
Status status_;
std::vector<Plane> planes_;
Request *request_;
};
class BufferPool final