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, 2 insertions, 5 deletions

diff --git a/src/android/post_processor.h b/src/android/post_processor.h
index 27eaef88..128161c8 100644
--- a/src/android/post_processor.h
+++ b/src/android/post_processor.h
@@ -11,8 +11,7 @@
 #include <libcamera/stream.h>
 
 #include "camera_buffer.h"
-
-class Camera3RequestDescriptor;
+#include "camera_request.h"
 
 class PostProcessor
 {
@@ -21,9 +20,7 @@ public:
 
 	virtual int configure(const libcamera::StreamConfiguration &inCfg,
 			      const libcamera::StreamConfiguration &outCfg) = 0;
-	virtual int process(const libcamera::FrameBuffer &source,
-			    CameraBuffer *destination,
-			    Camera3RequestDescriptor *request) = 0;
+	virtual int process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) = 0;
 };
 
 #endif /* __ANDROID_POST_PROCESSOR_H__ */