cam\src - libcamera/libcamera.git - libcamera official repository

Mode	Name	Size
-rw-r--r--	buffer_writer.cpp	2296	log plain
-rw-r--r--	buffer_writer.h	632	log plain
-rw-r--r--	capture.cpp	5439	log plain
-rw-r--r--	capture.h	1272	log plain
-rw-r--r--	event_loop.cpp	1382	log plain
-rw-r--r--	event_loop.h	762	log plain
-rw-r--r--	main.cpp	9267	log plain
-rw-r--r--	main.h	420	log plain
-rw-r--r--	meson.build	615	log plain
-rw-r--r--	options.cpp	11753	log plain
-rw-r--r--	options.h	3035	log plain
-rw-r--r--	stream_options.cpp	3212	log plain
-rw-r--r--	stream_options.h	764	log plain

#include <libcamera/base/log.h> #include <libcamera/ipa/core_ipa_interface.h> /** * \file awb.h */ namespace libcamera { namespace ipa::rkisp1::algorithms { /** * \class Awb * \brief A Grey world white balance correction algorithm */ LOG_DEFINE_CATEGORY(RkISP1Awb) /** * \copydoc libcamera::ipa::Algorithm::configure */ int Awb::configure(IPAContext &context, const IPACameraSensorInfo &configInfo) { context.frameContext.awb.gains.red = 1.0; context.frameContext.awb.gains.blue = 1.0; context.frameContext.awb.gains.green = 1.0; /* * Define the measurement window for AWB as a centered rectangle * covering 3/4 of the image width and height. */ context.configuration.awb.measureWindow.h_offs = configInfo.outputSize.width / 8; context.configuration.awb.measureWindow.v_offs = configInfo.outputSize.height / 8; context.configuration.awb.measureWindow.h_size = 3 * configInfo.outputSize.width / 4; context.configuration.awb.measureWindow.v_size = 3 * configInfo.outputSize.height / 4; return 0; } uint32_t Awb::estimateCCT(double red, double green, double blue) { /* Convert the RGB values to CIE tristimulus values (XYZ) */ double X = (-0.14282) * (red) + (1.54924) * (green) + (-0.95641) * (blue); double Y = (-0.32466) * (red) + (1.57837) * (green) + (-0.73191) * (blue); double Z = (-0.68202) * (red) + (0.77073) * (green) + (0.56332) * (blue); /* Calculate the normalized chromaticity values */ double x = X / (X + Y + Z); double y = Y / (X + Y + Z); /* Calculate CCT */ double n = (x - 0.3320) / (0.1858 - y); return 449 * n * n * n + 3525 * n * n + 6823.3 * n + 5520.33; } /** * \copydoc libcamera::ipa::Algorithm::prepare */ void Awb::prepare(IPAContext &context, rkisp1_params_cfg *params) { params->others.awb_gain_config.gain_green_b = 256 * context.frameContext.awb.gains.green; params->others.awb_gain_config.gain_blue = 256 * context.frameContext.awb.gains.blue; params->others.awb_gain_config.gain_red = 256 * context.frameContext.awb.gains.red; params->others.awb_gain_config.gain_green_r = 256 * context.frameContext.awb.gains.green; /* Update the gains. */ params->module_cfg_update |= RKISP1_CIF_ISP_MODULE_AWB_GAIN; /* If we already have configured the gains and window, return. */ if (context.frameContext.frameCount > 0) return; /* Configure the gains to apply. */ params->module_en_update |= RKISP1_CIF_ISP_MODULE_AWB_GAIN; /* Update the ISP to apply the gains configured. */ params->module_ens |= RKISP1_CIF_ISP_MODULE_AWB_GAIN; /* Configure the measure window for AWB. */ params->meas.awb_meas_config.awb_wnd = context.configuration.awb.measureWindow; /* * Measure Y, Cr and Cb means. * \todo RGB is not working, the kernel seems to not configure it ? */ params->meas.awb_meas_config.awb_mode = RKISP1_CIF_ISP_AWB_MODE_YCBCR; /* Reference Cr and Cb. */ params->meas.awb_meas_config.awb_ref_cb = 128; params->meas.awb_meas_config.awb_ref_cr = 128; /* Y values to include are between min_y and max_y only. */ params->meas.awb_meas_config.min_y = 16; params->meas.awb_meas_config.max_y = 250; /* Maximum Cr+Cb value to take into account for awb. */ params->meas.awb_meas_config.max_csum = 250; /* Minimum Cr and Cb values to take into account. */ params->meas.awb_meas_config.min_c = 16; /* Number of frames to use to estimate the mean (0 means 1 frame). */ params->meas.awb_meas_config.frames = 0; /* Update AWB measurement unit configuration. */ params->module_cfg_update |= RKISP1_CIF_ISP_MODULE_AWB; /* Make sure the ISP is measuring the means for the next frame. */ params->module_en_update |= RKISP1_CIF_ISP_MODULE_AWB; params->module_ens |= RKISP1_CIF_ISP_MODULE_AWB; } /** * \copydoc libcamera::ipa::Algorithm::process */ void Awb::process([[maybe_unused]] IPAContext &context, [[maybe_unused]] IPAFrameContext *frameCtx, const rkisp1_stat_buffer *stats) { const rkisp1_cif_isp_stat *params = &stats->params; const rkisp1_cif_isp_awb_stat *awb = &params->awb; IPAFrameContext &frameContext = context.frameContext; /* Get the YCbCr mean values */ double yMean = awb->awb_mean[0].mean_y_or_g; double crMean = awb->awb_mean[0].mean_cr_or_r; double cbMean = awb->awb_mean[0].mean_cb_or_b; /* * Convert from YCbCr to RGB. * The hardware uses the following formulas: * Y = 16 + 0.2500 R + 0.5000 G + 0.1094 B * Cb = 128 - 0.1406 R - 0.2969 G + 0.4375 B * Cr = 128 + 0.4375 R - 0.3750 G - 0.0625 B * * The inverse matrix is thus: