libcamera: ipu3: cio2: Hide buffer allocation and freeing from users

The allocation and freeing of buffers for the CIO2 is handled in the
IPU3 pipeline handlers start() and stop() functions. These functions
also call CIO2Device start() and stop() at the appropriate times so
move the CIO2 buffer allocation/freeing inside the CIO2Device and reduce
the complexity of the exposed interface.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libcamera/pipeline/ipu3/cio2.h b/src/libcamera/pipeline/ipu3/cio2.h
index 8cb90c9d..47c6f010 100644
--- a/src/libcamera/pipeline/ipu3/cio2.h
+++ b/src/libcamera/pipeline/ipu3/cio2.h
@@ -37,10 +37,8 @@ public:
 
 	StreamConfiguration generateConfiguration(Size size) const;
 
-	int allocateBuffers();
 	int exportBuffers(unsigned int count,
 			  std::vector<std::unique_ptr<FrameBuffer>> *buffers);
-	void freeBuffers();
 
 	FrameBuffer *getBuffer();
 	void putBuffer(FrameBuffer *buffer);
@@ -54,6 +52,8 @@ public:
 	Signal<FrameBuffer *> bufferReady;
 
 private:
+	void freeBuffers();
+
 	void cio2BufferReady(FrameBuffer *buffer);
 
 	CameraSensor *sensor_;