[libcamera-devel] [RFC PATCH 5/7] libcamera: software_isp: introduce getStatsFD()

[Andrey Konovalov]

The shared memory for passing the statistics to the Soft IPA is
allocated inside the Soft ISP. The FD of this memory needs to
be passed to the IPA.

Signed-off-by: Andrey Konovalov <andrey.konovalov at linaro.org>
---
 include/libcamera/internal/software_isp.h              | 4 ++++
 include/libcamera/internal/software_isp/swisp_linaro.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/include/libcamera/internal/software_isp.h b/include/libcamera/internal/software_isp.h
index 556203d9..2ce3c68a 100644
--- a/include/libcamera/internal/software_isp.h
+++ b/include/libcamera/internal/software_isp.h
@@ -16,6 +16,7 @@
 #include <vector>
 
 #include <libcamera/base/class.h>
+#include <libcamera/base/shared_fd.h>
 #include <libcamera/base/signal.h>
 
 #include <libcamera/geometry.h>
@@ -53,6 +54,9 @@ public:
 	virtual int queueBuffers(FrameBuffer *input,
 				 const std::map<unsigned int, FrameBuffer *> &outputs) = 0;
 
+	/* A hack to pass the FD from Soft ISP to Soft IPA */
+	virtual const SharedFD &getStatsFD() = 0;
+
 	Signal<FrameBuffer *> inputBufferReady;
 	Signal<FrameBuffer *> outputBufferReady;
 
diff --git a/include/libcamera/internal/software_isp/swisp_linaro.h b/include/libcamera/internal/software_isp/swisp_linaro.h
index 0d8a31a6..157898a8 100644
--- a/include/libcamera/internal/software_isp/swisp_linaro.h
+++ b/include/libcamera/internal/software_isp/swisp_linaro.h
@@ -44,6 +44,8 @@ public:
 	int queueBuffers(FrameBuffer *input,
 			 const std::map<unsigned int, FrameBuffer *> &outputs);
 
+	const SharedFD &getStatsFD() { return sharedStats_.fd(); }
+
 	void process(FrameBuffer *input, FrameBuffer *output);
 
 private:
-- 
2.34.1