{"id":12309,"url":"https://patchwork.libcamera.org/api/patches/12309/?format=json","web_url":"https://patchwork.libcamera.org/patch/12309/","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":"<20210518100706.578526-2-naush@raspberrypi.com>","date":"2021-05-18T10:07:03","name":"[libcamera-devel,1/4] ipa: raspberrypi: Add helper macros for std::chrono::duration","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"de3e48bb9d7072e36baf22db91b7225b0c49e498","submitter":{"id":34,"url":"https://patchwork.libcamera.org/api/people/34/?format=json","name":"Naushir Patuck","email":"naush@raspberrypi.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/12309/mbox/","series":[{"id":2034,"url":"https://patchwork.libcamera.org/api/series/2034/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=2034","date":"2021-05-18T10:07:02","name":"Switch RaspberryPi IPA to use std::chrono::duration","version":1,"mbox":"https://patchwork.libcamera.org/series/2034/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/12309/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/12309/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 1EAE0C31FF\n\tfor ;\n\tTue, 18 May 2021 10:09:15 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id AF3AD68923;\n\tTue, 18 May 2021 12:09:14 +0200 (CEST)","from mail-wr1-x435.google.com (mail-wr1-x435.google.com\n\t[IPv6:2a00:1450:4864:20::435])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 30B8F68918\n\tfor ;\n\tTue, 18 May 2021 12:09:12 +0200 (CEST)","by mail-wr1-x435.google.com with SMTP id j14so7804056wrq.5\n\tfor ;\n\tTue, 18 May 2021 03:09:12 -0700 (PDT)","from naush-laptop.pitowers.org\n\t([2a00:1098:3142:14:34e4:187b:f2:ed28])\n\tby smtp.gmail.com with ESMTPSA id\n\to11sm6566682wrq.93.2021.05.18.03.09.10\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tTue, 18 May 2021 03:09:10 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=raspberrypi.com header.i=@raspberrypi.com\n\theader.b=\"ipvv506i\"; 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This minimises the loss of precision when\nconverting timebases. A function for returning the duration count in any\ntimebase is also provided.\n\nAn operator << overload is define to help with displaying\nRPiController::Duration value in stream objects.\n\nSigned-off-by: Naushir Patuck \n---\n src/ipa/raspberrypi/controller/duration.hpp | 33 +++++++++++++++++++++\n 1 file changed, 33 insertions(+)\n create mode 100644 src/ipa/raspberrypi/controller/duration.hpp","diff":"diff --git a/src/ipa/raspberrypi/controller/duration.hpp b/src/ipa/raspberrypi/controller/duration.hpp\nnew file mode 100644\nindex 000000000000..98aa3d78f52f\n--- /dev/null\n+++ b/src/ipa/raspberrypi/controller/duration.hpp\n@@ -0,0 +1,33 @@\n+/* SPDX-License-Identifier: BSD-2-Clause */\n+/*\n+ * Copyright (C) 2021, Raspberry Pi (Trading) Limited\n+ *\n+ * duration.hpp - Helper macros for std::chrono::duration handling.\n+ */\n+#pragma once\n+\n+#include \n+#include \n+#include \n+\n+namespace RPiController {\n+\n+using Duration = std::chrono::duration;\n+\n+// Helper to convert and return the count of any std::chrono::duration type to\n+// another timebase. Use a double rep type to try and preserve precision.\n+template \n+static constexpr double DurationValue(T const &d)\n+{\n+\treturn std::chrono::duration_cast>(d).count();\n+};\n+\n+static inline std::ostream &operator<<(std::ostream &os, const Duration &duration)\n+{\n+ std::streamsize ss = os.precision();\n+ os << std::fixed << std::setprecision(2) << DurationValue(duration) << \" us\";\n+ os << std::setprecision(ss) << std::defaultfloat;\n+ return os;\n+}\n+\n+} // namespace RPiController\n","prefixes":["libcamera-devel","1/4"]}