[libcamera-devel] [RFC PATCH v2] libcamera: isp: Add ISP class

[Siyuan Fan]

From: Fan Siyuan <siyuan.fan at foxmail.com>

This version adds the isp statistics struct and two signals, which should
be connected to corresponding seperate functions.

Signed-off-by: Fan Siyuan <siyuan.fan at foxmail.com>
---
 include/libcamera/internal/isp.h | 102 +++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 include/libcamera/internal/isp.h

diff --git a/include/libcamera/internal/isp.h b/include/libcamera/internal/isp.h
new file mode 100644
index 00000000..4b4c38e7
--- /dev/null
+++ b/include/libcamera/internal/isp.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Siyuan Fan <siyuan.fan at foxmail.com>
+ *
+ * isp.h - The software ISP abstract base class
+ */
+#ifndef __LIBCAMERA_INTERNAL_ISP_H__
+#define __LIBCAMERA_INTERNAL_ISP_H__
+
+#include <vector>
+#include <memory>
+
+#include <libcamera/formats.h>
+#include <libcamera/framebuffer.h>
+#include <libcamera/geometry.h>
+#include <libcamera/pixel_format.h>
+
+#include "libcamera/base/object.h"
+#include "libcamera/base/signal.h"
+
+namespace libcamera{
+
+class ISP : public Object
+{
+public:
+        ISP() {}
+
+        virtual ~ISP() {}
+
+        virtual int configure(PixelFormat &inputFormat, PixelFormat &outputFormat, Size &inputSize, Size &outputSize) = 0;
+
+        virtual void processing(struct isp_stats *stats, FrameBuffer *srcBuffer, FrameBuffer *dstBuffer, int width, int height) = 0;
+
+        virtual void calculating(struct isp_stats* stats, FrameBuffer *srcBuffer) = 0;
+
+        virtual int exportBuffers(std::vector<std::unique_ptr<FrameBuffer>> *buffers, unsigned int count, int width, int height) = 0;
+
+        virtual int exportStats(struct isp_stats *stats) = 0;
+
+        virtual void start() = 0;
+
+        virtual void stop() = 0;
+
+        Signal<FrameBuffer *, FrameBuffer *> ispCompleted;
+        Signal<struct isp_stats *, FrameBuffer *> calcStats;
+        Signal<struct isp_stats *, FrameBuffer *, FrameBuffer *, int, int> imgProcess;
+
+        struct isp_black_level {
+            __u32 enabled;
+            __u16 bl_r;
+            __u16 bl_gr;
+            __u16 bl_gb;
+            __u16 bl_b;
+        };
+
+        struct isp_lens_shading {
+            __u32 enabled;
+            __u16 grid[16][16];
+        };
+
+        struct isp_denoise_raw {
+            __u32 enabled;
+        };
+
+        struct isp_auto_white_balance {
+            __u32 enabled;
+            __u64 r_mean;
+            __u64 g_mean;
+            __u64 b_mean;
+        };
+
+        struct isp_gamma_correct {
+            __u32 enabled;
+            __u16 gammaX[33];
+            __u16 gammaY[33];
+        };
+
+        struct isp_color_correct {
+            __u32 enabled;
+            __s32 ccm[3][3];
+        };
+
+        struct isp_histogram {
+            __u32 r_hist[1024];
+            __u32 g_hist[1024];
+            __u32 b_hist[1024];
+        };
+
+        struct isp_stats {
+            struct isp_black_level isp_bl;
+            struct isp_lens_shading isp_ls;
+            struct isp_denoise_raw isp_dr;
+            struct isp_auto_white_balance isp_awb;
+            struct isp_gamma_correct isp_gc;
+            struct isp_color_correct isp_cc;
+            struct isp_histogram isp_hist;
+        };    
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_INTERNAL_ISP_H__ */
-- 
2.20.1