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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-08-11 19:34:44 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-08-16 23:57:27 +0300
commite77c8951e9ff91bf2bacf81791a882ccb3cee30b (patch)
treeac66ba86468ae1aa5ad619c5fb276687aee65677 /utils/hooks/pre-push
parent5420e359f2416f6d290eea626dddb3a881dd900c (diff)
libcamera: base: extensible: Pass private pointer as unique_ptr<>
The Extensible constructor takes a pointer to a Private instance, whose lifetime it then manages. Make this explicit in the API by passing the pointer as a std::unique_ptr<Private>. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Diffstat (limited to 'utils/hooks/pre-push')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.1 (git 2.18.0) at 2025-05-27 22:13:36 +0000
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/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (C) 2019, Raspberry Pi (Trading) Limited
 *
 * cam_helper.cpp - helper information for different sensors
 */

#include <linux/videodev2.h>

#include <assert.h>
#include <map>
#include <string.h>

#include "libcamera/internal/v4l2_videodevice.h"

#include "cam_helper.hpp"
#include "md_parser.hpp"

using namespace RPiController;
using namespace libcamera;
using libcamera::utils::Duration;

namespace libcamera {
LOG_DECLARE_CATEGORY(IPARPI)
}

static std::map<std::string, CamHelperCreateFunc> cam_helpers;

CamHelper *CamHelper::Create(std::string const &cam_name)
{
	/*
	 * CamHelpers get registered by static RegisterCamHelper
	 * initialisers.
	 */
	for (auto &p : cam_helpers) {
		if (cam_name.find(p.first) != std::string::npos)
			return p.second();
	}

	return nullptr;
}

CamHelper::CamHelper(std::unique_ptr<MdParser> parser, unsigned int frameIntegrationDiff)
	: parser_(std::move(parser)), initialized_(false),
	  frameIntegrationDiff_(frameIntegrationDiff)
{
}

CamHelper::~CamHelper()
{
}

void CamHelper::Prepare(Span<const uint8_t> buffer,
			Metadata &metadata)
{
	parseEmbeddedData(buffer, metadata);
}

void CamHelper::Process([[maybe_unused]] StatisticsPtr &stats,
			[[maybe_unused]] Metadata &metadata)
{
}

uint32_t CamHelper::ExposureLines(const Duration exposure) const
{
	assert(initialized_);
	return exposure / mode_.line_length;
}

Duration CamHelper::Exposure(uint32_t exposure_lines) const
{
	assert(initialized_);
	return exposure_lines * mode_.line_length;
}

uint32_t CamHelper::GetVBlanking(Duration &exposure,
				 Duration minFrameDuration,
				 Duration maxFrameDuration) const
{
	uint32_t frameLengthMin, frameLengthMax, vblank;
	uint32_t exposureLines = ExposureLines(exposure);

	assert(initialized_);

	/*
	 * minFrameDuration and maxFrameDuration are clamped by the caller
	 * based on the limits for the active sensor mode.
	 */
	frameLengthMin = minFrameDuration / mode_.line_length;
	frameLengthMax = maxFrameDuration / mode_.line_length;

	/*
	 * Limit the exposure to the maximum frame duration requested, and
	 * re-calculate if it has been clipped.
	 */
	exposureLines = std::min(frameLengthMax - frameIntegrationDiff_, exposureLines);
	exposure = Exposure(exposureLines);

	/* Limit the vblank to the range allowed by the frame length limits. */
	vblank = std::clamp(exposureLines + frameIntegrationDiff_,
			    frameLengthMin, frameLengthMax) - mode_.height;
	return vblank;
}

void CamHelper::SetCameraMode(const CameraMode &mode)
{
	mode_ = mode;
	if (parser_) {
		parser_->SetBitsPerPixel(mode.bitdepth);
		parser_->SetLineLengthBytes(0); /* We use SetBufferSize. */
	}
	initialized_ = true;
}

void CamHelper::GetDelays(int &exposure_delay, int &gain_delay,
			  int &vblank_delay) const
{
	/*
	 * These values are correct for many sensors. Other sensors will
	 * need to over-ride this method.
	 */
	exposure_delay = 2;
	gain_delay = 1;
	vblank_delay = 2;
}

bool CamHelper::SensorEmbeddedDataPresent() const