From 6d93836e1ad97b84c6113b583befee88078e06ec Mon Sep 17 00:00:00 2001
From: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Date: Wed, 6 Dec 2023 12:43:05 +0100
Subject: ipa: rpi: Provide a Camera Helper for the OV64A40
Support the OV64A40 sensor with a camera helper to manage the gain
model, light sensitivity, and control delays.
Signed-off-by: Lee Jackson <lee.jackson@arducam.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
src/ipa/rpi/cam_helper/cam_helper_ov64a40.cpp | 74 +++++++++++++++++++++++++++
src/ipa/rpi/cam_helper/meson.build | 1 +
2 files changed, 75 insertions(+)
create mode 100644 src/ipa/rpi/cam_helper/cam_helper_ov64a40.cpp
(limited to 'src/ipa')
diff --git a/src/ipa/rpi/cam_helper/cam_helper_ov64a40.cpp b/src/ipa/rpi/cam_helper/cam_helper_ov64a40.cpp
new file mode 100644
index 00000000..27e449b1
--- /dev/null
+++ b/src/ipa/rpi/cam_helper/cam_helper_ov64a40.cpp
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2021, Raspberry Pi Ltd
+ * Copyright (C) 2023, Ideas on Board Oy.
+ *
+ * cam_helper_ov64a40.cpp - camera information for ov64a40 sensor
+ */
+
+#include <assert.h>
+
+#include "cam_helper.h"
+
+using namespace RPiController;
+
+class CamHelperOv64a40 : public CamHelper
+{
+public:
+ CamHelperOv64a40();
+ uint32_t gainCode(double gain) const override;
+ double gain(uint32_t gainCode) const override;
+ void getDelays(int &exposureDelay, int &gainDelay,
+ int &vblankDelay, int &hblankDelay) const override;
+ double getModeSensitivity(const CameraMode &mode) const override;
+
+private:
+ /*
+ * Smallest difference between the frame length and integration time,
+ * in units of lines.
+ */
+ static constexpr int frameIntegrationDiff = 32;
+};
+
+CamHelperOv64a40::CamHelperOv64a40()
+ : CamHelper({}, frameIntegrationDiff)
+{
+}
+
+uint32_t CamHelperOv64a40::gainCode(double gain) const
+{
+ return static_cast<uint32_t>(gain * 128.0);
+}
+
+double CamHelperOv64a40::gain(uint32_t gainCode) const
+{
+ return static_cast<double>(gainCode) / 128.0;
+}
+
+void CamHelperOv64a40::getDelays(int &exposureDelay, int &gainDelay,
+ int &vblankDelay, int &hblankDelay) const
+{
+ /* The driver appears to behave as follows: */
+ exposureDelay = 2;
+ gainDelay = 2;
+ vblankDelay = 2;
+ hblankDelay = 2;
+}
+
+double CamHelperOv64a40::getModeSensitivity(const CameraMode &mode) const
+{
+ if (mode.binX >= 2 && mode.scaleX >= 4) {
+ return 4.0;
+ } else if (mode.binX >= 2 && mode.scaleX >= 2) {
+ return 2.0;
+ } else {
+ return 1.0;
+ }
+}
+
+static CamHelper *create()
+{
+ return new CamHelperOv64a40();
+}
+
+static RegisterCamHelper reg("ov64a40", &create);
diff --git a/src/ipa/rpi/cam_helper/meson.build b/src/ipa/rpi/cam_helper/meson.build
index bdf2db8e..72625057 100644
--- a/src/ipa/rpi/cam_helper/meson.build
+++ b/src/ipa/rpi/cam_helper/meson.build
@@ -9,6 +9,7 @@ rpi_ipa_cam_helper_sources = files([
'cam_helper_imx477.cpp',
'cam_helper_imx519.cpp',
'cam_helper_imx708.cpp',
+ 'cam_helper_ov64a40.cpp',
'cam_helper_ov9281.cpp',
'md_parser_smia.cpp',
])
--
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