{"id":26144,"url":"https://patchwork.libcamera.org/api/patches/26144/?format=json","web_url":"https://patchwork.libcamera.org/patch/26144/","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":"<20260213-kbingham-quantizers-v7-2-1626b9aaabf1@ideasonboard.com>","date":"2026-02-13T16:57:41","name":"[v7,02/15] test: libipa: Add tests for Quantized types","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"80188c01a03527ff96e964a70781422c550e0209","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/26144/mbox/","series":[{"id":5789,"url":"https://patchwork.libcamera.org/api/series/5789/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5789","date":"2026-02-13T16:57:39","name":"libipa: Introduce a Quantized type","version":7,"mbox":"https://patchwork.libcamera.org/series/5789/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/26144/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/26144/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 B3B64BD78E\n\tfor ;\n\tFri, 13 Feb 2026 16:58:14 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 14CF762010;\n\tFri, 13 Feb 2026 17:58:10 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id C055B621CD\n\tfor ;\n\tFri, 13 Feb 2026 17:58:04 +0100 (CET)","from ping.linuxembedded.co.uk\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 7A731DDE;\n\tFri, 13 Feb 2026 17:57:15 +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=\"fMcXXpVp\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1771001835;\n\tbh=SfOnutHcwHdL9Z/xc9kACc2h3DEoaZdGXaMFQlltf1A=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=fMcXXpVpF8yggHP9dUKsbslJt7BxdJxvDxTu4XEA6hBIw99Ztr25UlYXuJfp6oKX0\n\tBa0nzWukw3WQt6JJ/HwZE8luVW6zs86h6tI/vLZ5MeYkYK0vs5AXdqFHMSvurHLeAE\n\t9xHzOQIOYmo42vkZOLqPumXJfuQH4rJ7wxRHHB0c=","From":"Kieran Bingham ","Date":"Fri, 13 Feb 2026 16:57:41 +0000","Subject":"[PATCH v7 02/15] test: libipa: Add tests for Quantized types","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20260213-kbingham-quantizers-v7-2-1626b9aaabf1@ideasonboard.com>","References":"<20260213-kbingham-quantizers-v7-0-1626b9aaabf1@ideasonboard.com>","In-Reply-To":"<20260213-kbingham-quantizers-v7-0-1626b9aaabf1@ideasonboard.com>","To":"libcamera-devel@lists.libcamera.org","Cc":"Kieran Bingham , \n\tIsaac Scott ","X-Mailer":"b4 0.14.3","X-Developer-Signature":"v=1; a=ed25519-sha256; t=1771001883; l=4998;\n\ti=kieran.bingham@ideasonboard.com; s=20260207;\n\th=from:subject:message-id; \n\tbh=SfOnutHcwHdL9Z/xc9kACc2h3DEoaZdGXaMFQlltf1A=;\n\tb=c6c8CwMkFCkMiBM2wmYxnQmSUteqs1lzr6neuZh3mlMiDPKs5sWsl3Go3tdGQLX72sM9x5F3M\n\tcAaLoJBskyECHoh7slbULdvoKtEEukbn2NTQqD+To5yHIbRnbOsnJlF","X-Developer-Key":"i=kieran.bingham@ideasonboard.com; a=ed25519;\n\tpk=FVXKN7YuwHc6UtbRUeTMAmranfsQomA+vnilfglWdaY=","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":"Provide use case tests for the Quantized types to ensure construction\nand usages are consistent and work as expected.\n\nReviewed-by: Isaac Scott \nSigned-off-by: Kieran Bingham \n\n---\nv3:\n- Rename quantized_type to QuantizedType\n\nv5:\n- use static asserts for constructible failure tests\n- Remove constexpr from lround users (only possible in C++23)\n- Remove move tests\n- Fix up inequality test\n\nv6:\n- Remove static casts on fromFloat conversions\n- Use int8_t(64) instead of (int8_t)64\n- Add new test from different floats to the same quantized value\n---\n test/ipa/libipa/meson.build | 1 +\n test/ipa/libipa/quantized.cpp | 148 ++++++++++++++++++++++++++++++++++++++++++\n 2 files changed, 149 insertions(+)","diff":"diff --git a/test/ipa/libipa/meson.build b/test/ipa/libipa/meson.build\nindex 2070bed70222..c3e255871f4f 100644\n--- a/test/ipa/libipa/meson.build\n+++ b/test/ipa/libipa/meson.build\n@@ -5,6 +5,7 @@ libipa_test = [\n {'name': 'histogram', 'sources': ['histogram.cpp']},\n {'name': 'interpolator', 'sources': ['interpolator.cpp']},\n {'name': 'pwl', 'sources': ['pwl.cpp'] },\n+ {'name': 'quantized', 'sources': ['quantized.cpp']},\n ]\n \n foreach test : libipa_test\ndiff --git a/test/ipa/libipa/quantized.cpp b/test/ipa/libipa/quantized.cpp\nnew file mode 100644\nindex 000000000000..860d54d2dd18\n--- /dev/null\n+++ b/test/ipa/libipa/quantized.cpp\n@@ -0,0 +1,148 @@\n+/* SPDX-License-Identifier: GPL-2.0-or-later */\n+/*\n+ * Copyright (C) 2025, Ideas on Board\n+ *\n+ * Dual Type and Quantizer tests\n+ */\n+\n+#include \"../src/ipa/libipa/quantized.h\"\n+\n+#include \n+#include \n+#include \n+#include \n+#include \n+\n+#include \"test.h\"\n+\n+using namespace std;\n+using namespace libcamera;\n+using namespace ipa;\n+\n+struct BrightnessHueTraits {\n+\tusing QuantizedType = int8_t;\n+\tstatic QuantizedType fromFloat(float v)\n+\t{\n+\t\tint quantized = std::lround(v * 128.0f);\n+\t\treturn std::clamp(quantized, -128, 127);\n+\t}\n+\tstatic float toFloat(QuantizedType v)\n+\t{\n+\t\treturn static_cast(v) / 128.0f;\n+\t}\n+};\n+\n+using BrightnessHueQuantizer = Quantized;\n+\n+struct ContrastSaturationTraits {\n+\tusing QuantizedType = uint8_t;\n+\tstatic QuantizedType fromFloat(float v)\n+\t{\n+\t\tint quantized = std::lround(v * 128.0f);\n+\t\treturn std::clamp(quantized, 0, 255);\n+\t}\n+\tstatic float toFloat(QuantizedType v)\n+\t{\n+\t\treturn static_cast(v) / 128.0f;\n+\t}\n+};\n+\n+using ContrastSaturationQuantizer = Quantized;\n+\n+using BrightnessQ = BrightnessHueQuantizer;\n+using HueQ = BrightnessHueQuantizer;\n+using ContrastQ = ContrastSaturationQuantizer;\n+using SaturationQ = ContrastSaturationQuantizer;\n+\n+class QuantizedTest : public Test\n+{\n+protected:\n+\tint run()\n+\t{\n+\t\t/* Test construction from float */\n+\t\t{\n+\t\t\tBrightnessQ b(0.5f);\n+\t\t\tif (b.quantized() != 64 || std::abs(b.value() - 0.5f) > 0.01f)\n+\t\t\t\treturn TestFail;\n+\t\t}\n+\n+\t\t/* Test construction from T */\n+\t\t{\n+\t\t\tContrastQ c(uint8_t(128));\n+\t\t\tif (c.quantized() != 128 || std::abs(c.value() - 1.0f) > 0.01f)\n+\t\t\t\treturn TestFail;\n+\t\t}\n+\n+\t\t/*\n+\t\t * Only construction from the exact storage type or a float\n+\t\t * is permitted.\n+\t\t */\n+\t\tstatic_assert(!std::is_constructible_v);\n+\t\tstatic_assert(!std::is_constructible_v);\n+\t\tstatic_assert(!std::is_constructible_v);\n+\t\tstatic_assert(!std::is_constructible_v);\n+\t\tstatic_assert(!std::is_constructible_v);\n+\t\tstatic_assert(!std::is_constructible_v);\n+\n+\t\t/* Test equality */\n+\t\t{\n+\t\t\tBrightnessQ b1(0.5f), b2(int8_t(64));\n+\t\t\tif (!(b1 == b2))\n+\t\t\t\treturn TestFail;\n+\t\t}\n+\n+\t\t/* Test inequality */\n+\t\t{\n+\t\t\tBrightnessQ b1(0.5f), b2(-0.5f);\n+\t\t\tif (!(b1 != b2))\n+\t\t\t\treturn TestFail;\n+\t\t}\n+\n+\t\t/* Test copying */\n+\t\t{\n+\t\t\tBrightnessQ b1(0.25f);\n+\t\t\tBrightnessQ b2 = b1;\n+\t\t\tif (!(b1 == b2))\n+\t\t\t\treturn TestFail;\n+\t\t}\n+\n+\t\t/* Test assignment */\n+\t\t{\n+\t\t\tContrastQ c1(1.5f);\n+\t\t\tContrastQ c2(0.0f);\n+\t\t\tc2 = c1;\n+\t\t\tif (!(c1 == c2))\n+\t\t\t\treturn TestFail;\n+\t\t}\n+\n+\t\t/*\n+\t\t * Test construction from different floats mapping to same\n+\t\t * quantized value\n+\t\t */\n+\t\t{\n+\t\t\t/* Two floats that have the same quantized value. */\n+\t\t\tconst float f1 = 1.007f;\n+\t\t\tconst float f2 = 1.008f;\n+\n+\t\t\tContrastQ c1(f1);\n+\t\t\tContrastQ c2(f2);\n+\n+\t\t\t/* Quantized values must match */\n+\t\t\tif (!(c1.quantized() == c2.quantized()))\n+\t\t\t\treturn TestFail;\n+\n+\t\t\t/* Float values must now match */\n+\t\t\tif (!(c1.value() == c2.value()))\n+\t\t\t\treturn TestFail;\n+\n+\t\t\tif (!(c1 == c2))\n+\t\t\t\treturn TestFail;\n+\t\t}\n+\n+\t\tstd::cout << \"Quantised tests passed successfully.\" << std::endl;\n+\n+\t\treturn TestPass;\n+\t}\n+};\n+\n+TEST_REGISTER(QuantizedTest)\n","prefixes":["v7","02/15"]}