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{ "id": 14997, "url": "https://patchwork.libcamera.org/api/1.1/patches/14997/?format=api", "web_url": "https://patchwork.libcamera.org/patch/14997/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/1.1/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20211202180410.518232-4-jeanmichel.hautbois@ideasonboard.com>", "date": "2021-12-02T18:04:07", "name": "[libcamera-devel,v1,3/6] ipa: rkisp1: Introduce Black Level Correction", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": false, "hash": "9f09d99cc2efe06f9d88bf2544ebf2c22811b04c", "submitter": { "id": 75, "url": "https://patchwork.libcamera.org/api/1.1/people/75/?format=api", "name": "Jean-Michel Hautbois", "email": "jeanmichel.hautbois@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/14997/mbox/", "series": [ { "id": 2805, "url": "https://patchwork.libcamera.org/api/1.1/series/2805/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2805", "date": "2021-12-02T18:04:04", "name": "IPA RkISP1 awb and misc improvements", "version": 1, "mbox": "https://patchwork.libcamera.org/series/2805/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/14997/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/14997/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "X-Original-To": "parsemail@patchwork.libcamera.org", "Delivered-To": "parsemail@patchwork.libcamera.org", "Received": [ "from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 1B7AEC3251\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 2 Dec 2021 18:04:22 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 6F3AA60868;\n\tThu, 2 Dec 2021 19:04:21 +0100 (CET)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 25F7F6011A\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 2 Dec 2021 19:04:16 +0100 (CET)", "from tatooine.ideasonboard.com (unknown\n\t[IPv6:2a01:e0a:169:7140:7fc3:78ca:aeee:c4f2])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id D36D1464;\n\tThu, 2 Dec 2021 19:04:15 +0100 (CET)" ], "Authentication-Results": "lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"Th0Bxex8\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1638468255;\n\tbh=TkTQ8kxotqAnmNOPgXWihMPGKiJb3I86ez5T1Y1gRXA=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Th0Bxex8cPLuJ/zZV9+S+MkD4UnYMiqZOIfFpLJAyB/E8tO2ppqhtlkCk/Gr+pZga\n\thEVqJBXtgGTPv6QhTcLDqcPJHJHlomepTHRcQLOTwq/atzBZJDZBAFMeb0MZbMf00A\n\tWbKdBM314PiFkopF333EZR4mVQvEug7jcSdhf/j4=", "From": "Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Thu, 2 Dec 2021 19:04:07 +0100", "Message-Id": "<20211202180410.518232-4-jeanmichel.hautbois@ideasonboard.com>", "X-Mailer": "git-send-email 2.32.0", "In-Reply-To": "<20211202180410.518232-1-jeanmichel.hautbois@ideasonboard.com>", "References": "<20211202180410.518232-1-jeanmichel.hautbois@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v1 3/6] ipa: rkisp1: Introduce Black Level\n\tCorrection", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "In order to have the proper pixel levels, apply a fixed black level\ncorrection, based on the imx219 tuning file in RPi. The value is 4096 on\n16 bits, and the pipeline for RkISP1 is on 12 bits, scale it.\n\nSigned-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>\n---\n src/ipa/rkisp1/algorithms/blc.cpp | 55 +++++++++++++++++++++++++++\n src/ipa/rkisp1/algorithms/blc.h | 30 +++++++++++++++\n src/ipa/rkisp1/algorithms/meson.build | 1 +\n src/ipa/rkisp1/rkisp1.cpp | 2 +\n 4 files changed, 88 insertions(+)\n create mode 100644 src/ipa/rkisp1/algorithms/blc.cpp\n create mode 100644 src/ipa/rkisp1/algorithms/blc.h", "diff": "diff --git a/src/ipa/rkisp1/algorithms/blc.cpp b/src/ipa/rkisp1/algorithms/blc.cpp\nnew file mode 100644\nindex 000000000..f27a8e439\n--- /dev/null\n+++ b/src/ipa/rkisp1/algorithms/blc.cpp\n@@ -0,0 +1,55 @@\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/*\n+ * Copyright (C) 2021, Ideas On Board\n+ *\n+ * blc.cpp - RkISP1 Black Level Correction control\n+ */\n+\n+#include \"blc.h\"\n+\n+/**\n+ * \\file blc.h\n+ */\n+\n+namespace libcamera {\n+\n+namespace ipa::rkisp1::algorithms {\n+\n+/**\n+ * \\class BlackLevelCorrection\n+ * \\brief RkISP1 Black Level Correction control\n+ *\n+ * The pixels output by the camera normally include a black level, because\n+ * sensors do not always report a signal level of '0' for black. Pixels at or\n+ * below this level should be considered black. To achieve that, the RkISP BLC\n+ * algorithm subtracts a configurable offset from all pixels.\n+ *\n+ * The black level can be measured at runtime from an optical dark region of the\n+ * camera sensor, or measured during the camera tuning process. The first option\n+ * isn't currently supported.\n+ */\n+\n+/**\n+ * \\copydoc libcamera::ipa::Algorithm::prepare\n+ */\n+void BlackLevelCorrection::prepare([[maybe_unused]] IPAContext &context,\n+\t\t\t\t rkisp1_params_cfg *params)\n+{\n+\t/*\n+\t * Substract fixed values taken from imx219 tuning file.\n+\t * \\todo Use a configuration file for it ?\n+\t */\n+\tparams->others.bls_config.enable_auto = 0;\n+\tparams->others.bls_config.fixed_val.r = 256;\n+\tparams->others.bls_config.fixed_val.gr = 256;\n+\tparams->others.bls_config.fixed_val.gb = 256;\n+\tparams->others.bls_config.fixed_val.b = 256;\n+\n+\tparams->module_en_update |= RKISP1_CIF_ISP_MODULE_BLS;\n+\tparams->module_ens |= RKISP1_CIF_ISP_MODULE_BLS;\n+\tparams->module_cfg_update |= RKISP1_CIF_ISP_MODULE_BLS;\n+}\n+\n+} /* namespace ipa::rkisp1::algorithms */\n+\n+} /* namespace libcamera */\ndiff --git a/src/ipa/rkisp1/algorithms/blc.h b/src/ipa/rkisp1/algorithms/blc.h\nnew file mode 100644\nindex 000000000..331a22097\n--- /dev/null\n+++ b/src/ipa/rkisp1/algorithms/blc.h\n@@ -0,0 +1,30 @@\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/*\n+ * Copyright (C) 2021, Ideas On Board\n+ *\n+ * blc.h - RkISP1 Black Level Correction control\n+ */\n+\n+#pragma once\n+\n+#include <linux/rkisp1-config.h>\n+\n+#include \"algorithm.h\"\n+\n+namespace libcamera {\n+\n+struct IPACameraSensorInfo;\n+\n+namespace ipa::rkisp1::algorithms {\n+\n+class BlackLevelCorrection : public Algorithm\n+{\n+public:\n+\tBlackLevelCorrection() = default;\n+\t~BlackLevelCorrection() = default;\n+\n+\tvoid prepare(IPAContext &context, rkisp1_params_cfg *params) override;\n+};\n+\n+} /* namespace ipa::rkisp1::algorithms */\n+} /* namespace libcamera */\ndiff --git a/src/ipa/rkisp1/algorithms/meson.build b/src/ipa/rkisp1/algorithms/meson.build\nindex 0678518d8..e6767aa5f 100644\n--- a/src/ipa/rkisp1/algorithms/meson.build\n+++ b/src/ipa/rkisp1/algorithms/meson.build\n@@ -2,5 +2,6 @@\n \n rkisp1_ipa_algorithms = files([\n 'agc.cpp',\n+ 'blc.cpp',\n 'sdg.cpp',\n ])\ndiff --git a/src/ipa/rkisp1/rkisp1.cpp b/src/ipa/rkisp1/rkisp1.cpp\nindex cd425a2e1..ec879ba37 100644\n--- a/src/ipa/rkisp1/rkisp1.cpp\n+++ b/src/ipa/rkisp1/rkisp1.cpp\n@@ -27,6 +27,7 @@\n \n #include \"algorithms/agc.h\"\n #include \"algorithms/algorithm.h\"\n+#include \"algorithms/blc.h\"\n #include \"algorithms/sdg.h\"\n #include \"libipa/camera_sensor_helper.h\"\n \n@@ -126,6 +127,7 @@ int IPARkISP1::init(const IPASettings &settings, unsigned int hwRevision)\n \n \t/* Construct our Algorithms */\n \talgorithms_.push_back(std::make_unique<algorithms::Agc>());\n+\talgorithms_.push_back(std::make_unique<algorithms::BlackLevelCorrection>());\n \talgorithms_.push_back(std::make_unique<algorithms::SensorDeGamma>());\n \n \treturn 0;\n", "prefixes": [ "libcamera-devel", "v1", "3/6" ] }