/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2020, Google Inc. * * span.cpp - Span tests */ /* * Include first to ensure the header is self-contained, as there's no span.cpp * in libcamera. */ #include #include #include #include #include "test.h" using namespace std; using namespace libcamera; class SpanTest : public Test { protected: int run() { int i[4]{ 1, 2, 3, 4 }; std::array a{ 1, 2, 3, 4 }; const std::array ca{ 1, 2, 3, 4 }; std::vector v{ 1, 2, 3, 4 }; const std::vector cv{ 1, 2, 3, 4 }; /* * Compile-test construction and usage of spans with static * extent. Commented-out tests are expected not to compile, or * to generate undefined behaviour. */ Span{}; /* Span{}; */ Span{ &i[0], 4 }; Span{ &i[0], &i[3] }; Span{ i }; /* Span{ i }; */ /* Span{ i }; */ Span{ a }; Span{ a }; /* Span{ a }; */ /* Span{ a }; */ Span{ ca }; /* Span{ ca }; */ /* Span{ ca }; */ /* Span{ ca }; */ Span{ v }; Span{ v }; /* Span{ v }; */ Span{ v }; /* Span{ v }; */ /* Span{ v }; */ Span staticSpan{ i }; Span{ staticSpan }; Span{ staticSpan }; /* Span{ staticSpan }; */ staticSpan = Span{ v }; staticSpan.begin(); staticSpan.cbegin(); staticSpan.end(); staticSpan.cend(); staticSpan.rbegin(); staticSpan.crbegin(); staticSpan.rend(); staticSpan.crend(); staticSpan.front(); staticSpan.back(); staticSpan[0]; staticSpan.data(); staticSpan.size(); staticSpan.size_bytes(); staticSpan.empty(); staticSpan.first<2>(); staticSpan.first(2); /* staticSpan.first<6>(); */ /* staticSpan.first(6); */ staticSpan.last<2>(); staticSpan.last(2); /* staticSpan.last<6>(); */ /* staticSpan.last(6); */ staticSpan.subspan<1>(); staticSpan.subspan<1, 2>(); staticSpan.subspan(1); staticSpan.subspan(1, 2); /* staticSpan.subspan(2, 4); */ /* * Compile-test construction and usage of spans with static * extent. Commented-out tests are expected not to compile, or * to generate undefined behaviour. */ Span{}; Span{ &i[0], 4 }; Span{ &i[0], &i[3] }; Span{ i }; /* Span{ i }; */ Span{ a }; Span{ a }; /* Span{ a }; */ Span{ ca }; /* Span{ca}; */ /* Span{ca}; */ Span{ v }; Span{ v }; /* Span{ v }; */ Span{ v }; /* Span{ v }; */ /* Span{ v }; */ Span dynamicSpan{ i }; Span{ dynamicSpan }; Span{ dynamicSpan }; dynamicSpan = Span{ a }; dynamicSpan.begin(); dynamicSpan.cbegin(); dynamicSpan.end(); dynamicSpan.cend(); dynamicSpan.rbegin(); dynamicSpan.crbegin(); dynamicSpan.rend(); dynamicSpan.crend(); dynamicSpan.front(); dynamicSpan.back(); dynamicSpan[0]; dynamicSpan.data(); dynamicSpan.size(); dynamicSpan.size_bytes(); dynamicSpan.empty(); dynamicSpan.first<2>(); dynamicSpan.first(2); /* dynamicSpan.first<6>(); */ /* dynamicSpan.first(6); */ dynamicSpan.last<2>(); dynamicSpan.last(2); /* dynamicSpan.last<6>(); */ /* dynamicSpan.last(6); */ dynamicSpan.subspan<1>(); dynamicSpan.subspan<1, 2>(); dynamicSpan.subspan(1); dynamicSpan.subspan(1, 2); /* dynamicSpan.subspan(2, 4); */ return TestPass; } }; TEST_REGISTER(SpanTest) 'get' action='/libcamera/jmondi/libcamera.git/log/src/ipa/ipu3/algorithms/agc.cpp'>
path: root/src/ipa/ipu3/algorithms/agc.cpp
blob: 970ec42419cc5881efa318d298240fa1b0e5d373 (plain) 
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2021, Ideas On Board
 *
 * ipu3_agc.cpp - AGC/AEC control algorithm
 */

#include "agc.h"

#include <algorithm>
#include <chrono>
#include <cmath>

#include <libcamera/base/log.h>

#include <libcamera/ipa/core_ipa_interface.h>

#include "libipa/histogram.h"

namespace libcamera {

using namespace std::literals::chrono_literals;

namespace ipa::ipu3::algorithms {

LOG_DEFINE_CATEGORY(IPU3Agc)

/* Number of frames to wait before calculating stats on minimum exposure */
static constexpr uint32_t kInitialFrameMinAECount = 4;
/* Number of frames to wait between new gain/exposure estimations */
static constexpr uint32_t kFrameSkipCount = 6;

/* Maximum ISO value for analogue gain */
static constexpr uint32_t kMinISO = 100;
static constexpr uint32_t kMaxISO = 1500;

/* Maximum analogue gain value
 * \todo grab it from a camera helper */
static constexpr uint32_t kMinGain = kMinISO / 100;
static constexpr uint32_t kMaxGain = kMaxISO / 100;

/* \todo use calculated value based on sensor */
static constexpr uint32_t kMinExposure = 1;
static constexpr uint32_t kMaxExposure = 1976;

/* Histogram constants */
static constexpr uint32_t knumHistogramBins = 256;
static constexpr double kEvGainTarget = 0.5;

Agc::Agc()
	: frameCount_(0), lastFrame_(0), iqMean_(0.0), lineDuration_(0s),
	  maxExposureTime_(0s), prevExposure_(0s), prevExposureNoDg_(0s),
	  currentExposure_(0s), currentExposureNoDg_(0s)
{
}

int Agc::configure(IPAContext &context, const IPAConfigInfo &configInfo)
{
	stride_ = context.configuration.grid.stride;

	lineDuration_ = configInfo.sensorInfo.lineLength * 1.0s
		      / configInfo.sensorInfo.pixelRate;
	maxExposureTime_ = kMaxExposure * lineDuration_;

	return 0;