ipa: rkisp1: Add ISP parameters abstraction class

Individual algorithms of the rkisp1 IPA module access their
corresponding ISP parameters through the top-level structure
rkisp1_params_cfg. This will not work anymore with the new parameters
format. In order to ease the transition to the new format, abstract the
ISP parameters in a new RkISP1Params class that offers the same
interface regardless of the format.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>

1 files changed, 157 insertions, 0 deletions

diff --git a/src/ipa/rkisp1/params.h b/src/ipa/rkisp1/params.h
new file mode 100644
index 00000000..28a781bc
--- /dev/null
+++ b/src/ipa/rkisp1/params.h
@@ -0,0 +1,157 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2024, Ideas On Board
+ *
+ * RkISP1 ISP Parameters
+ */
+
+#pragma once
+
+#include <map>
+#include <stdint.h>
+
+#include <linux/rkisp1-config.h>
+
+#include <libcamera/base/class.h>
+#include <libcamera/base/span.h>
+
+namespace libcamera {
+
+namespace ipa::rkisp1 {
+
+enum class BlockType {
+	Bls,
+	Dpcc,
+	Sdg,
+	AwbGain,
+	Flt,
+	Bdm,
+	Ctk,
+	Goc,
+	Dpf,
+	DpfStrength,
+	Cproc,
+	Ie,
+	Lsc,
+	Awb,
+	Hst,
+	Aec,
+	Afc,
+};
+
+namespace details {
+
+template<BlockType B>
+struct block_type {
+};
+
+#define RKISP1_DEFINE_BLOCK_TYPE(blockType, blockStruct)		\
+template<>								\
+struct block_type<BlockType::blockType> {				\
+	using type = struct rkisp1_cif_isp_##blockStruct##_config;	\
+};
+
+RKISP1_DEFINE_BLOCK_TYPE(Bls, bls)
+RKISP1_DEFINE_BLOCK_TYPE(Dpcc, dpcc)
+RKISP1_DEFINE_BLOCK_TYPE(Sdg, sdg)
+RKISP1_DEFINE_BLOCK_TYPE(AwbGain, awb_gain)
+RKISP1_DEFINE_BLOCK_TYPE(Flt, flt)
+RKISP1_DEFINE_BLOCK_TYPE(Bdm, bdm)
+RKISP1_DEFINE_BLOCK_TYPE(Ctk, ctk)
+RKISP1_DEFINE_BLOCK_TYPE(Goc, goc)
+RKISP1_DEFINE_BLOCK_TYPE(Dpf, dpf)
+RKISP1_DEFINE_BLOCK_TYPE(DpfStrength, dpf_strength)
+RKISP1_DEFINE_BLOCK_TYPE(Cproc, cproc)
+RKISP1_DEFINE_BLOCK_TYPE(Ie, ie)
+RKISP1_DEFINE_BLOCK_TYPE(Lsc, lsc)
+RKISP1_DEFINE_BLOCK_TYPE(Awb, awb_meas)
+RKISP1_DEFINE_BLOCK_TYPE(Hst, hst)
+RKISP1_DEFINE_BLOCK_TYPE(Aec, aec)
+RKISP1_DEFINE_BLOCK_TYPE(Afc, afc)
+
+} /* namespace details */
+
+class RkISP1Params;
+
+class RkISP1ParamsBlockBase
+{
+public:
+	RkISP1ParamsBlockBase(RkISP1Params *params, BlockType type,
+			      const Span<uint8_t> &data);
+
+	Span<uint8_t> data() const { return data_; }
+
+	void setEnabled(bool enabled);
+
+private:
+	LIBCAMERA_DISABLE_COPY(RkISP1ParamsBlockBase)
+
+	RkISP1Params *params_;
+	BlockType type_;
+	Span<uint8_t> header_;
+	Span<uint8_t> data_;
+};
+
+template<BlockType B>
+class RkISP1ParamsBlock : public RkISP1ParamsBlockBase
+{
+public:
+	using Type = typename details::block_type<B>::type;
+
+	RkISP1ParamsBlock(RkISP1Params *params, const Span<uint8_t> &data)
+		: RkISP1ParamsBlockBase(params, B, data)
+	{
+	}
+
+	const Type *operator->() const
+	{
+		return reinterpret_cast<const Type *>(data().data());
+	}
+
+	Type *operator->()
+	{
+		return reinterpret_cast<Type *>(data().data());
+	}
+
+	const Type &operator*() const &
+	{
+		return *reinterpret_cast<const Type *>(data().data());
+	}
+
+	Type &operator*() &
+	{
+		return *reinterpret_cast<Type *>(data().data());
+	}
+};
+
+class RkISP1Params
+{
+public:
+	RkISP1Params(uint32_t format, Span<uint8_t> data);
+
+	template<BlockType B>
+	RkISP1ParamsBlock<B> block()
+	{
+		return RkISP1ParamsBlock<B>(this, block(B));
+	}
+
+	uint32_t format() const { return format_; }
+	size_t size() const { return used_; }
+
+private:
+	friend class RkISP1ParamsBlockBase;
+
+	Span<uint8_t> block(BlockType type);
+	void setBlockEnabled(BlockType type, bool enabled);
+
+	uint32_t format_;
+
+	Span<uint8_t> data_;
+	size_t used_;
+
+	std::map<BlockType, Span<uint8_t>> blocks_;
+};
+
+} /* namespace ipa::rkisp1 */
+
+} /* namespace libcamera*/