android: post_processor: Consolidate contextual information

Save and provide the context for post-processor of a camera stream
via Camera3RequestDescriptor::StreamBuffer. We extend the structure
to include source and destination buffers for the post processor, along
with CameraStream::Type::Internal buffer pointer (if any). In addition
to that, a back pointer to Camera3RequestDescriptor is convenient to
get access to overall descriptor (status, metadata settings etc.).

Also, migrate CameraStream::process() and PostProcessor::process()
signature to use Camera3RequestDescriptor::StreamBuffer only. This
will be helpful when we move to async post-processing in subsequent
commits.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/android/camera_request.h b/src/android/camera_request.h
index 4d80ef32..ebe2e89d 100644
--- a/src/android/camera_request.h
+++ b/src/android/camera_request.h
@@ -20,6 +20,7 @@
 #include "camera_metadata.h"
 #include "camera_worker.h"
 
+class CameraBuffer;
 class CameraStream;
 
 class Camera3RequestDescriptor
@@ -36,6 +37,10 @@ public:
 		std::unique_ptr<libcamera::FrameBuffer> frameBuffer;
 		int fence;
 		Status status;
+		libcamera::FrameBuffer *internalBuffer;
+		const libcamera::FrameBuffer *srcBuffer;
+		std::unique_ptr<CameraBuffer> dstBuffer;
+		Camera3RequestDescriptor *request;
 	};
 
 	Camera3RequestDescriptor(libcamera::Camera *camera,