libcamera: swstats_cpu: Move header to libcamera/internal/software_isp

Move the swstats_cpu.h file to include/libcamera/internal/software_isp/
so that it can be used outside the src/libcamera/software_isp/ directory.

Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

include/libcamera/internal/software_isp/meson.build

@@ -4,4 +4,5 @@ libcamera_internal_headers += files([
     'debayer_params.h',
     'software_isp.h',
     'swisp_stats.h',
+    'swstats_cpu.h',
 ])

include/libcamera/internal/software_isp/swstats_cpu.h

@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2023, Linaro Ltd
+ * Copyright (C) 2023, Red Hat Inc.
+ *
+ * Authors:
+ * Hans de Goede <hdegoede@redhat.com>
+ *
+ * CPU based software statistics implementation
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#include <libcamera/base/signal.h>
+
+#include <libcamera/geometry.h>
+
+#include "libcamera/internal/bayer_format.h"
+#include "libcamera/internal/shared_mem_object.h"
+#include "libcamera/internal/software_isp/swisp_stats.h"
+
+namespace libcamera {
+
+class PixelFormat;
+struct StreamConfiguration;
+
+class SwStatsCpu
+{
+public:
+	SwStatsCpu();
+	~SwStatsCpu() = default;
+
+	bool isValid() const { return sharedStats_.fd().isValid(); }
+
+	const SharedFD &getStatsFD() { return sharedStats_.fd(); }
+
+	const Size &patternSize() { return patternSize_; }
+
+	int configure(const StreamConfiguration &inputCfg);
+	void setWindow(const Rectangle &window);
+	void startFrame();
+	void finishFrame(uint32_t frame, uint32_t bufferId);
+
+	void processLine0(unsigned int y, const uint8_t *src[])
+	{
+		if ((y & ySkipMask_) || y < static_cast<unsigned int>(window_.y) ||
+		    y >= (window_.y + window_.height))
+			return;
+
+		(this->*stats0_)(src);
+	}
+
+	void processLine2(unsigned int y, const uint8_t *src[])
+	{
+		if ((y & ySkipMask_) || y < static_cast<unsigned int>(window_.y) ||
+		    y >= (window_.y + window_.height))
+			return;
+
+		(this->*stats2_)(src);
+	}
+
+	Signal<uint32_t, uint32_t> statsReady;
+
+private:
+	using statsProcessFn = void (SwStatsCpu::*)(const uint8_t *src[]);
+
+	int setupStandardBayerOrder(BayerFormat::Order order);
+	/* Bayer 8 bpp unpacked */
+	void statsBGGR8Line0(const uint8_t *src[]);
+	/* Bayer 10 bpp unpacked */
+	void statsBGGR10Line0(const uint8_t *src[]);
+	/* Bayer 12 bpp unpacked */
+	void statsBGGR12Line0(const uint8_t *src[]);
+	/* Bayer 10 bpp packed */
+	void statsBGGR10PLine0(const uint8_t *src[]);
+	void statsGBRG10PLine0(const uint8_t *src[]);
+
+	/* Variables set by configure(), used every line */
+	statsProcessFn stats0_;
+	statsProcessFn stats2_;
+	bool swapLines_;
+
+	unsigned int ySkipMask_;
+
+	Rectangle window_;
+
+	Size patternSize_;
+
+	unsigned int xShift_;
+
+	SharedMemObject<SwIspStats> sharedStats_;
+	SwIspStats stats_;
+};
+
+} /* namespace libcamera */