{"id":25805,"url":"https://patchwork.libcamera.org/api/patches/25805/?format=json","web_url":"https://patchwork.libcamera.org/patch/25805/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260114173918.1744023-10-kieran.bingham@ideasonboard.com>","date":"2026-01-14T17:39:09","name":"[v5,09/16] ipa: rkisp1: cproc: Provide a Hue control","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"3f42ef7371f52ab9aa559029d5f18d2d1d3794ee","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/?format=json","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/25805/mbox/","series":[{"id":5708,"url":"https://patchwork.libcamera.org/api/series/5708/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5708","date":"2026-01-14T17:39:00","name":"libipa: Introduce a Quantized type","version":5,"mbox":"https://patchwork.libcamera.org/series/5708/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/25805/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/25805/checks/","tags":{},"headers":{"Return-Path":"","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 560C0C32C1\n\tfor ;\n\tWed, 14 Jan 2026 17:39:38 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id CCD1A61FFA;\n\tWed, 14 Jan 2026 18:39:34 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 2EF9F61FCE\n\tfor ;\n\tWed, 14 Jan 2026 18:39:25 +0100 (CET)","from Monstersaurus.infra.iob\n\t(cpc89244-aztw30-2-0-cust6594.18-1.cable.virginm.net [86.31.185.195])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 42F222833;\n\tWed, 14 Jan 2026 18:38:58 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"NMrORDdC\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1768412338;\n\tbh=3VSP5skkjuqG/dNBEqFQ5bBMwDLQv2lUyV0JH8hiwcQ=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=NMrORDdCQr7zs6LTvBzLubeiiCsmyJZzl0y/y/qegPHvY1xHuyYFml7SaGXlbekH0\n\t6eEVUHtLx40PukW9nPtVCopTwmWYeuPDH/biWHklxHc5h2KYEqKepNpYAdzHfqlI2l\n\t2uC6MIHKK/Cs5FLWBE+2sewIh/cRj6ScTyahnoBo=","From":"Kieran Bingham ","To":"libcamera devel ","Cc":"Kieran Bingham ,\n\tIsaac Scott ","Subject":"[PATCH v5 09/16] ipa: rkisp1: cproc: Provide a Hue control","Date":"Wed, 14 Jan 2026 17:39:09 +0000","Message-ID":"<20260114173918.1744023-10-kieran.bingham@ideasonboard.com>","X-Mailer":"git-send-email 2.52.0","In-Reply-To":"<20260114173918.1744023-1-kieran.bingham@ideasonboard.com>","References":"<20260114173918.1744023-1-kieran.bingham@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"The RKISP1 supports a configurable Hue as part of the colour processing\nunit (cproc).\n\nImplement the new control converting to the hardware scale accordingly\nand report the applied control in the completed request metadata.\n\nThis is implemented as a phase shift of the chrominance values between\n-90 and +87.188 degrees according to the datasheet however the type\nitself would imply that this is a range between -90 and 89.2969.\n\nMoreover, the hardware applies the inverse phase shift to the operation\nexpected and documented by libcamera, so we apply a negative scale when\nconverting the libcamera control to the Q<1,7> type, resulting in a\nrange of -89.2969 to +90.0 degrees control.\n\nReviewed-by: Isaac Scott \nSigned-off-by: Kieran Bingham \n\n---\n\nv5:\n- Use Q<1, 7> directly and handle scaling in cproc.cpp\n- Use full string of quantized in debug log\n- Invert/Negate the hardware hue direction\n\nSigned-off-by: Kieran Bingham \n---\n src/ipa/rkisp1/algorithms/cproc.cpp | 28 ++++++++++++++++++++++++++++\n src/ipa/rkisp1/ipa_context.h | 3 +++\n 2 files changed, 31 insertions(+)","diff":"diff --git a/src/ipa/rkisp1/algorithms/cproc.cpp b/src/ipa/rkisp1/algorithms/cproc.cpp\nindex e9e2b5444bc9..7484e4780094 100644\n--- a/src/ipa/rkisp1/algorithms/cproc.cpp\n+++ b/src/ipa/rkisp1/algorithms/cproc.cpp\n@@ -37,8 +37,15 @@ namespace {\n \n constexpr float kDefaultBrightness = 0.0f;\n constexpr float kDefaultContrast = 1.0f;\n+constexpr float kDefaultHue = 0.0f;\n constexpr float kDefaultSaturation = 1.0f;\n \n+/*\n+ * The Hue scale is negated as the hardware performs the opposite phase shift\n+ * to what is expected and defined from the libcamera Hue control value.\n+ */\n+constexpr float kHueScale = -90.0f;\n+\n } /* namespace */\n \n /**\n@@ -53,6 +60,11 @@ int ColorProcessing::init(IPAContext &context,\n \tcmap[&controls::Contrast] = ControlInfo(0.0f, 1.993f, kDefaultContrast);\n \tcmap[&controls::Saturation] = ControlInfo(0.0f, 1.993f, kDefaultSaturation);\n \n+\t/* Hue adjustment is negated by kHueScale, min/max are swapped */\n+\tcmap[&controls::Hue] = ControlInfo(HueQ::TraitsType::max * kHueScale,\n+\t\t\t\t\t HueQ::TraitsType::min * kHueScale,\n+\t\t\t\t\t kDefaultHue);\n+\n \treturn 0;\n }\n \n@@ -66,6 +78,7 @@ int ColorProcessing::configure(IPAContext &context,\n \n \tcproc.brightness = BrightnessQ(kDefaultBrightness);\n \tcproc.contrast = ContrastQ(kDefaultContrast);\n+\tcproc.hue = HueQ(kDefaultHue);\n \tcproc.saturation = SaturationQ(kDefaultSaturation);\n \n \treturn 0;\n@@ -107,6 +120,18 @@ void ColorProcessing::queueRequest(IPAContext &context,\n \t\tLOG(RkISP1CProc, Debug) << \"Set contrast to \" << value;\n \t}\n \n+\tconst auto &hue = controls.get(controls::Hue);\n+\tif (hue) {\n+\t\t/* Scale the Hue from ]-90, +90] */\n+\t\tHueQ value = *hue / kHueScale;\n+\t\tif (cproc.hue != value) {\n+\t\t\tcproc.hue = value;\n+\t\t\tupdate = true;\n+\t\t}\n+\n+\t\tLOG(RkISP1CProc, Debug) << \"Set hue to \" << value;\n+\t}\n+\n \tconst auto saturation = controls.get(controls::Saturation);\n \tif (saturation) {\n \t\tSaturationQ value = *saturation;\n@@ -120,6 +145,7 @@ void ColorProcessing::queueRequest(IPAContext &context,\n \n \tframeContext.cproc.brightness = cproc.brightness;\n \tframeContext.cproc.contrast = cproc.contrast;\n+\tframeContext.cproc.hue = cproc.hue;\n \tframeContext.cproc.saturation = cproc.saturation;\n \tframeContext.cproc.update = update;\n }\n@@ -140,6 +166,7 @@ void ColorProcessing::prepare([[maybe_unused]] IPAContext &context,\n \tconfig.setEnabled(true);\n \tconfig->brightness = frameContext.cproc.brightness.quantized();\n \tconfig->contrast = frameContext.cproc.contrast.quantized();\n+\tconfig->hue = frameContext.cproc.hue.quantized();\n \tconfig->sat = frameContext.cproc.saturation.quantized();\n }\n \n@@ -154,6 +181,7 @@ void ColorProcessing::process([[maybe_unused]] IPAContext &context,\n {\n \tmetadata.set(controls::Brightness, frameContext.cproc.brightness.value());\n \tmetadata.set(controls::Contrast, frameContext.cproc.contrast.value());\n+\tmetadata.set(controls::Hue, frameContext.cproc.hue.value() * kHueScale);\n \tmetadata.set(controls::Saturation, frameContext.cproc.saturation.value());\n }\n \ndiff --git a/src/ipa/rkisp1/ipa_context.h b/src/ipa/rkisp1/ipa_context.h\nindex cdb9a17b5adc..80b035044cda 100644\n--- a/src/ipa/rkisp1/ipa_context.h\n+++ b/src/ipa/rkisp1/ipa_context.h\n@@ -36,6 +36,7 @@ namespace ipa::rkisp1 {\n /* Fixed point types used by CPROC */\n using BrightnessQ = Q<1, 7>;\n using ContrastQ = UQ<1, 7>;\n+using HueQ = Q<1, 7>;\n using SaturationQ = UQ<1, 7>;\n \n struct IPAHwSettings {\n@@ -123,6 +124,7 @@ struct IPAActiveState {\n \tstruct {\n \t\tBrightnessQ brightness;\n \t\tContrastQ contrast;\n+\t\tHueQ hue;\n \t\tSaturationQ saturation;\n \t} cproc;\n \n@@ -181,6 +183,7 @@ struct IPAFrameContext : public FrameContext {\n \tstruct {\n \t\tBrightnessQ brightness;\n \t\tContrastQ contrast;\n+\t\tHueQ hue;\n \t\tSaturationQ saturation;\n \n \t\tbool update;\n","prefixes":["v5","09/16"]}