libcamera: ipa: Extend to support IPA interactions

The IPA interface needs to support interactions with the pipeline; add
interfaces to control the sensor and handling of request ISP parameters
and statistics.

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

include/ipa/ipa_interface.h

@@ -7,14 +7,50 @@
 #ifndef __LIBCAMERA_IPA_INTERFACE_H__
 #define __LIBCAMERA_IPA_INTERFACE_H__
 
+#include <map>
+#include <vector>
+
+#include <libcamera/buffer.h>
+#include <libcamera/controls.h>
+#include <libcamera/geometry.h>
+#include <libcamera/signal.h>
+
+#include "v4l2_controls.h"
+
 namespace libcamera {
 
+struct IPAStream {
+	unsigned int pixelFormat;
+	Size size;
+};
+
+struct IPABuffer {
+	unsigned int id;
+	BufferMemory memory;
+};
+
+struct IPAOperationData {
+	unsigned int operation;
+	std::vector<uint32_t> data;
+	std::vector<ControlList> controls;
+	std::vector<V4L2ControlList> v4l2controls;
+};
+
 class IPAInterface
 {
 public:
 	virtual ~IPAInterface() {}
 
 	virtual int init() = 0;
+
+	virtual void configure(const std::map<unsigned int, IPAStream> &streamConfig,
+			       const std::map<unsigned int, V4L2ControlInfoMap> &entityControls) = 0;
+
+	virtual void mapBuffers(const std::vector<IPABuffer> &buffers) = 0;
+	virtual void unmapBuffers(const std::vector<unsigned int> &ids) = 0;
+
+	virtual void processEvent(const IPAOperationData &data) = 0;
+	Signal<unsigned int, const IPAOperationData &> queueFrameAction;
 };
 
 } /* namespace libcamera */