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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-05-08 19:28:06 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-05-09 23:31:14 +0300
commit829acb3ab0b178110f449bed238ef117fa96408d (patch)
tree06ac1d2028b6da535faa9ee2f6cf998c18e1c226 /test/object.cpp
parentf1522e94dfaedcde26280eb6387f2c6f2de66fd7 (diff)
libcamera: Drop file name from header comment blocks in templates
Source files in libcamera start by a comment block header, which includes the file name and a one-line description of the file contents. While the latter is useful to get a quick overview of the file contents at a glance, the former is mostly a source of inconvenience. The name in the comments can easily get out of sync with the file name when files are renamed, and copy & paste during development have often lead to incorrect names being used to start with. Readers of the source code are expected to know which file they're looking it. Drop the file name from the header comment blocks in template files and templates embedded in generator scripts. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Diffstat (limited to 'test/object.cpp')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-20 00:46:57 +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;

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(MdParser *parser, unsigned int frameIntegrationDiff)
	: parser_(parser), initialized_(false),
	  frameIntegrationDiff_(frameIntegrationDiff)
{
}

CamHelper::~CamHelper()
{
	delete parser_;
}

uint32_t CamHelper::ExposureLines(double exposure_us) const
{
	assert(initialized_);
	return exposure_us * 1000.0 / mode_.line_length;
}

double CamHelper::Exposure(uint32_t exposure_lines) const
{
	assert(initialized_);
	return exposure_lines * mode_.line_length / 1000.0;
}

uint32_t CamHelper::GetVBlanking(double &exposure, double minFrameDuration,
				 double 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 = 1e3 * minFrameDuration / mode_.line_length;
	frameLengthMax = 1e3 * 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. */