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libcamera: pipeline: Add FrameBuffer handlers

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Extend the pipeline handlers to support the FrameBuffer API with three
new methods to handle allocation, importing and freeing of buffers. The
new methods will replace allocateBuffers() and freeBuffers().

The FrameBuffer API will use the methods on a stream level and either
allocate or import buffers for each active stream controlled from the
Camera class and an upcoming FrameBufferAllocator helper. With this new
API the implementation in pipeline handlers can be made simpler as all
streams don't need to be handled in allocateBuffers().

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Niklas Söderlund
2019-12-30 00:49:14 +01:00
parent 6c69bf982e
commit e9e6135d97
6 changed files with 190 additions and 0 deletions
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src/libcamera/include/pipeline_handler.h
+5
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@@ -70,6 +70,11 @@ public:
const StreamRoles &roles) = 0;
virtual int configure(Camera *camera, CameraConfiguration *config) = 0;
virtual int exportFrameBuffers(Camera *camera, Stream *stream,
std::vector<std::unique_ptr<FrameBuffer>> *buffers) = 0;
virtual int importFrameBuffers(Camera *camera, Stream *stream) = 0;
virtual void freeFrameBuffers(Camera *camera, Stream *stream) = 0;
virtual int allocateBuffers(Camera *camera,
const std::set<Stream *> &streams) = 0;
virtual int freeBuffers(Camera *camera,