pipeline: ipa: raspberrypi: Handle any externally allocated FrameBuffer

Handle the case where a FrameBuffer that has been externally allocated
(i.e. not through the v4l2 video device) is passed into a Request.

We must store the buffer pointer in the stream internal buffer list to
identify when used.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/libcamera/pipeline/raspberrypi/rpi_stream.h b/src/libcamera/pipeline/raspberrypi/rpi_stream.h
index df986367..a2c21bcd 100644
--- a/src/libcamera/pipeline/raspberrypi/rpi_stream.h
+++ b/src/libcamera/pipeline/raspberrypi/rpi_stream.h
@@ -31,13 +31,13 @@ class RPiStream : public Stream
 {
 public:
 	RPiStream()
-		: id_(RPiIpaMask::ID)
+		: id_(RPiBufferMask::ID)
 	{
 	}
 
 	RPiStream(const char *name, MediaEntity *dev, bool importOnly = false)
 		: external_(false), importOnly_(importOnly), name_(name),
-		  dev_(std::make_unique<V4L2VideoDevice>(dev)), id_(RPiIpaMask::ID)
+		  dev_(std::make_unique<V4L2VideoDevice>(dev)), id_(RPiBufferMask::ID)
 	{
 	}
 
@@ -53,6 +53,9 @@ public:
 	const BufferMap &getBuffers() const;
 	int getBufferId(FrameBuffer *buffer) const;
 
+	void setExternalBuffer(FrameBuffer *buffer);
+	void removeExternalBuffer(FrameBuffer *buffer);
+
 	int prepareBuffers(unsigned int count);
 	int queueBuffer(FrameBuffer *buffer);
 	void returnBuffer(FrameBuffer *buffer);