/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2021, Google inc. * * tone_mapping.cpp - IPU3 ToneMapping and Gamma control */ #include "tone_mapping.h" #include #include /** * \file tone_mapping.h */ namespace libcamera { namespace ipa::ipu3::algorithms { /** * \class ToneMapping * \brief A class to handle tone mapping based on gamma * * This algorithm improves the image dynamic using a look-up table which is * generated based on a gamma parameter. */ ToneMapping::ToneMapping() : gamma_(1.0) { } /** * \brief Configure the tone mapping given a configInfo * \param[in] context The shared IPA context * \param[in] configInfo The IPA configuration data * * \return 0 */ int ToneMapping::configure(IPAContext &context, [[maybe_unused]] const IPAConfigInfo &configInfo) { /* Initialise tone mapping gamma value. */ context.activeState.toneMapping.gamma = 0.0; return 0; } /** * \brief Fill in the parameter structure, and enable gamma control * \param[in] context The shared IPA context * \param[in] frame The frame context sequence number * \param[in] frameContext The FrameContext for this frame * \param[out] params The IPU3 parameters * * Populate the IPU3 parameter structure with our tone mapping look up table and * enable the gamma control module in the processing blocks. */ void ToneMapping::prepare([[maybe_unused]] IPAContext &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] IPAFrameContext &frameContext, ipu3_uapi_params *params) { /* Copy the calculated LUT into the parameters buffer. */ memcpy(params->acc_param.gamma.gc_lut.lut, context.activeState.toneMapping.gammaCorrection.lut, IPU3_UAPI_GAMMA_CORR_LUT_ENTRIES * sizeof(params->acc_param.gamma.gc_lut.lut[0])); /* Enable the custom gamma table. */ params->use.acc_gamma = 1; params->acc_param.gamma.gc_ctrl.enable = 1; } /** * \brief Calculate the tone mapping look up table * \param[in] context The shared IPA context * \param[in] frame The current frame sequence number * \param[in] frameContext The current frame context * \param[in] stats The IPU3 statistics and ISP results * \param[out] metadata Metadata for the frame, to be filled by the algorithm * * The tone mapping look up table is generated as an inverse power curve from * our gamma setting. */ void ToneMapping::process(IPAContext &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] IPAFrameContext &frameContext, [[maybe_unused]] const ipu3_uapi_stats_3a *stats, [[maybe_unused]] ControlList &metadata) { /* * Hardcode gamma to 1.1 as a default for now. * * \todo Expose gamma control setting through the libcamera control API */ gamma_ = 1.1; if (context.activeState.toneMapping.gamma == gamma_) return; struct ipu3_uapi_gamma_corr_lut &lut = context.activeState.toneMapping.gammaCorrection; for (uint32_t i = 0; i < std::size(lut.lut); i++) { double j = static_cast(i) / (std::size(lut.lut) - 1); double gamma = std::pow(j, 1.0 / gamma_); /* The output value is expressed on 13 bits. */ lut.lut[i] = gamma * 8191; } context.activeState.toneMapping.gamma = gamma_; } REGISTER_IPA_ALGORITHM(ToneMapping, "ToneMapping") } /* namespace ipa::ipu3::algorithms */ } /* namespace libcamera */ ref='#n7'>7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * geometry.h - Geometry-related classes
 */

#ifndef __LIBCAMERA_GEOMETRY_H__
#define __LIBCAMERA_GEOMETRY_H__

#include <algorithm>
#include <string>

#include <libcamera/compiler.h>

namespace libcamera {

class Rectangle;

class Point
{
public:
	constexpr Point()
		: x(0), y(0)
	{
	}

	constexpr Point(int xpos, int ypos)
		: x(xpos), y(ypos)
	{
	}

	int x;
	int y;

	const std::string toString() const;

	constexpr Point operator-() const
	{
		return { -x, -y };
	}
};

bool operator==(const Point &lhs, const Point &rhs);
static inline bool operator!=(const Point &lhs, const Point &rhs)
{
	return !(lhs == rhs);
}

class Size
{
public:
	constexpr Size()
		: Size(0, 0)
	{
	}

	constexpr Size(unsigned int w, unsigned int h)
		: width(w), height(h)
	{
	}

	unsigned int width;
	unsigned int height;

	bool isNull() const { return !width && !height; }
	const std::string toString() const;

	Size &alignDownTo(unsigned int hAlignment, unsigned int vAlignment)
	{
		width = width / hAlignment * hAlignment;
		height = height / vAlignment * vAlignment;
		return *this;
	}

	Size &alignUpTo(unsigned int hAlignment, unsigned int vAlignment)
	{
		width = (width + hAlignment - 1) / hAlignment * hAlignment;
		height = (height + vAlignment - 1) / vAlignment * vAlignment;
		return *this;
	}

	Size &boundTo(const Size &bound)
	{
		width = std::min(width, bound.width);
		height = std::min(height, bound.height);
		return *this;
	}

	Size &expandTo(const Size &expand)
	{