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f95bae418c
s/Raspberry Pi (Trading) Limited/Raspberry Pi Ltd/ to reflect the new Raspberry Pi entity name. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
108 lines
2.4 KiB
C++
108 lines
2.4 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2019, Raspberry Pi Ltd
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*
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* cam_helper_ov5647.cpp - camera information for ov5647 sensor
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*/
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#include <assert.h>
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#include "cam_helper.h"
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using namespace RPiController;
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class CamHelperOv5647 : public CamHelper
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{
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public:
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CamHelperOv5647();
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uint32_t gainCode(double gain) const override;
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double gain(uint32_t gainCode) const override;
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void getDelays(int &exposureDelay, int &gainDelay,
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int &vblankDelay) const override;
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unsigned int hideFramesStartup() const override;
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unsigned int hideFramesModeSwitch() const override;
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unsigned int mistrustFramesStartup() const override;
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unsigned int mistrustFramesModeSwitch() const override;
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private:
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/*
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* Smallest difference between the frame length and integration time,
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* in units of lines.
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*/
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static constexpr int frameIntegrationDiff = 4;
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};
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/*
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* OV5647 doesn't output metadata, so we have to use the "unicam parser" which
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* works by counting frames.
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*/
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CamHelperOv5647::CamHelperOv5647()
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: CamHelper({}, frameIntegrationDiff)
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{
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}
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uint32_t CamHelperOv5647::gainCode(double gain) const
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{
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return static_cast<uint32_t>(gain * 16.0);
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}
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double CamHelperOv5647::gain(uint32_t gainCode) const
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{
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return static_cast<double>(gainCode) / 16.0;
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}
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void CamHelperOv5647::getDelays(int &exposureDelay, int &gainDelay,
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int &vblankDelay) const
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{
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/*
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* We run this sensor in a mode where the gain delay is bumped up to
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* 2. It seems to be the only way to make the delays "predictable".
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*/
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exposureDelay = 2;
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gainDelay = 2;
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vblankDelay = 2;
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}
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unsigned int CamHelperOv5647::hideFramesStartup() const
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{
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/*
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* On startup, we get a couple of under-exposed frames which
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* we don't want shown.
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*/
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return 2;
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}
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unsigned int CamHelperOv5647::hideFramesModeSwitch() const
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{
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/*
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* After a mode switch, we get a couple of under-exposed frames which
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* we don't want shown.
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*/
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return 2;
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}
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unsigned int CamHelperOv5647::mistrustFramesStartup() const
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{
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/*
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* First couple of frames are under-exposed and are no good for control
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* algos.
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*/
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return 2;
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}
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unsigned int CamHelperOv5647::mistrustFramesModeSwitch() const
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{
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/*
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* First couple of frames are under-exposed even after a simple
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* mode switch, and are no good for control algos.
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*/
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return 2;
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}
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static CamHelper *create()
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{
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return new CamHelperOv5647();
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}
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static RegisterCamHelper reg("ov5647", &create);
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