Naushir PatuckandLaurent Pinchart
aa2fe6a86f
Update CamHelper::getDelays() to return the sensor HBLANK delay. The HBLANK delay is set to the same value as VBLANK delay for all sensors in the Raspberry Pi IPA. Return the HBLANK gain delay from the IPA to the pipeline handler, and initialise DelayedControls to handle V4L2_CID_HBLANK with this delay value. As a drive-by, check that the V4L2_CID_HBLANK control is available when calling IPARPi::configure(). Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
69 lines
1.4 KiB
C++
69 lines
1.4 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2021, Raspberry Pi Ltd
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*
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* cam_helper_imx290.cpp - camera helper for imx290 sensor
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*/
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#include <math.h>
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#include "cam_helper.h"
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using namespace RPiController;
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class CamHelperImx290 : public CamHelper
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{
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public:
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CamHelperImx290();
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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, int &hblankDelay) const override;
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unsigned int hideFramesModeSwitch() 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 = 2;
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};
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CamHelperImx290::CamHelperImx290()
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: CamHelper({}, frameIntegrationDiff)
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{
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}
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uint32_t CamHelperImx290::gainCode(double gain) const
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{
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int code = 66.6667 * log10(gain);
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return std::max(0, std::min(code, 0xf0));
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}
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double CamHelperImx290::gain(uint32_t gainCode) const
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{
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return pow(10, 0.015 * gainCode);
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}
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void CamHelperImx290::getDelays(int &exposureDelay, int &gainDelay,
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int &vblankDelay, int &hblankDelay) const
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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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hblankDelay = 2;
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}
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unsigned int CamHelperImx290::hideFramesModeSwitch() const
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{
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/* After a mode switch, we seem to get 1 bad frame. */
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return 1;
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}
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static CamHelper *create()
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{
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return new CamHelperImx290();
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}
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static RegisterCamHelper reg("imx290", &create);
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