{"id":13212,"url":"https://patchwork.libcamera.org/api/1.1/patches/13212/?format=json","web_url":"https://patchwork.libcamera.org/patch/13212/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/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":"<20210805142154.20324-2-david.plowman@raspberrypi.com>","date":"2021-08-05T14:21:52","name":"[libcamera-devel,1/3] libcamera: Add ColorSpace class","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"9c3c977edaaee10b8b007f5822c92b3ede51cc5c","submitter":{"id":42,"url":"https://patchwork.libcamera.org/api/1.1/people/42/?format=json","name":"David Plowman","email":"david.plowman@raspberrypi.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/13212/mbox/","series":[{"id":2308,"url":"https://patchwork.libcamera.org/api/1.1/series/2308/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=2308","date":"2021-08-05T14:21:51","name":"Colour spaces","version":1,"mbox":"https://patchwork.libcamera.org/series/2308/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/13212/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/13212/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 1CB5FC3237\n\tfor ;\n\tThu, 5 Aug 2021 14:22:02 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby 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2021 15:21:52 +0100","Message-Id":"<20210805142154.20324-2-david.plowman@raspberrypi.com>","X-Mailer":"git-send-email 2.20.1","In-Reply-To":"<20210805142154.20324-1-david.plowman@raspberrypi.com>","References":"<20210805142154.20324-1-david.plowman@raspberrypi.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH 1/3] libcamera: Add ColorSpace class","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":"This class represents a colour space by defining its YCbCr encoding,\nthe transfer (gamma) function is uses, and whether the output is full\nor limited range.\n\nSigned-off-by: David Plowman \n---\n include/libcamera/color_space.h | 94 +++++++++++++++++\n include/libcamera/meson.build | 1 +\n src/libcamera/color_space.cpp | 180 ++++++++++++++++++++++++++++++++\n src/libcamera/meson.build | 1 +\n 4 files changed, 276 insertions(+)\n create mode 100644 include/libcamera/color_space.h\n create mode 100644 src/libcamera/color_space.cpp","diff":"diff --git a/include/libcamera/color_space.h b/include/libcamera/color_space.h\nnew file mode 100644\nindex 00000000..3d990f99\n--- /dev/null\n+++ b/include/libcamera/color_space.h\n@@ -0,0 +1,94 @@\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/*\n+ * Copyright (C) 2021, Raspberry Pi (Trading) Limited\n+ *\n+ * color_space.h - color space definitions\n+ */\n+\n+#ifndef __LIBCAMERA_COLOR_SPACE_H__\n+#define __LIBCAMERA_COLOR_SPACE_H__\n+\n+#include \n+\n+namespace libcamera {\n+\n+class ColorSpace\n+{\n+public:\n+\tenum class Encoding : int {\n+\t\tUNDEFINED,\n+\t\tRAW,\n+\t\tREC601,\n+\t\tREC709,\n+\t\tREC2020,\n+\t\tVIDEO,\n+\t};\n+\n+\tenum class TransferFunction : int {\n+\t\tUNDEFINED,\n+\t\tIDENTITY,\n+\t\tSRGB,\n+\t\tREC709,\n+\t};\n+\n+\tenum class Range : int {\n+\t\tUNDEFINED,\n+\t\tFULL,\n+\t\tLIMITED,\n+\t};\n+\n+\tconstexpr ColorSpace(Encoding e, TransferFunction t, Range r)\n+\t\t: encoding(e), transferFunction(t), range(r)\n+\t{\n+\t}\n+\n+\tconstexpr ColorSpace()\n+\t\t: ColorSpace(Encoding::UNDEFINED, TransferFunction::UNDEFINED, Range::UNDEFINED)\n+\t{\n+\t}\n+\n+\tstatic const ColorSpace UNDEFINED;\n+\tstatic const ColorSpace RAW;\n+\tstatic const ColorSpace JFIF;\n+\tstatic const ColorSpace SMPTE170M;\n+\tstatic const ColorSpace REC709;\n+\tstatic const ColorSpace REC2020;\n+\tstatic const ColorSpace VIDEO;\n+\n+\tEncoding encoding;\n+\tTransferFunction transferFunction;\n+\tRange range;\n+\n+\tbool isFullyDefined() const\n+\t{\n+\t\treturn encoding != Encoding::UNDEFINED &&\n+\t\t transferFunction != TransferFunction::UNDEFINED &&\n+\t\t range != Range::UNDEFINED;\n+\t}\n+\n+\tconst std::string toString() const;\n+};\n+\n+constexpr ColorSpace ColorSpace::UNDEFINED = { Encoding::UNDEFINED, TransferFunction::UNDEFINED, Range::UNDEFINED };\n+constexpr ColorSpace ColorSpace::RAW = { Encoding::RAW, TransferFunction::IDENTITY, Range::FULL };\n+constexpr ColorSpace ColorSpace::JFIF = { Encoding::REC601, TransferFunction::SRGB, Range::FULL };\n+constexpr ColorSpace ColorSpace::SMPTE170M = { Encoding::REC601, TransferFunction::REC709, Range::LIMITED };\n+constexpr ColorSpace ColorSpace::REC709 = { Encoding::REC709, TransferFunction::REC709, Range::LIMITED };\n+constexpr ColorSpace ColorSpace::REC2020 = { Encoding::REC2020, TransferFunction::REC709, Range::LIMITED };\n+constexpr ColorSpace ColorSpace::VIDEO = { Encoding::VIDEO, TransferFunction::REC709, Range::LIMITED };\n+\n+static inline bool operator==(const ColorSpace &lhs, const ColorSpace &rhs)\n+{\n+\treturn lhs.encoding == rhs.encoding &&\n+\t lhs.transferFunction == rhs.transferFunction &&\n+\t lhs.range == rhs.range;\n+}\n+\n+static inline bool operator!=(const ColorSpace &lhs, const ColorSpace &rhs)\n+{\n+\treturn !(lhs == rhs);\n+}\n+\n+} /* namespace libcamera */\n+\n+#endif /* __LIBCAMERA_COLOR_SPACE_H__ */\ndiff --git a/include/libcamera/meson.build b/include/libcamera/meson.build\nindex 5b25ef84..7a8a04e5 100644\n--- a/include/libcamera/meson.build\n+++ b/include/libcamera/meson.build\n@@ -3,6 +3,7 @@\n libcamera_public_headers = files([\n 'camera.h',\n 'camera_manager.h',\n+ 'color_space.h',\n 'compiler.h',\n 'controls.h',\n 'file_descriptor.h',\ndiff --git a/src/libcamera/color_space.cpp b/src/libcamera/color_space.cpp\nnew file mode 100644\nindex 00000000..c40264db\n--- /dev/null\n+++ b/src/libcamera/color_space.cpp\n@@ -0,0 +1,180 @@\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/*\n+ * Copyright (C) 2021, Raspberry Pi (Trading) Limited\n+ *\n+ * color_space.cpp - color spaces.\n+ */\n+\n+#include \n+\n+/**\n+ * \\file color_space.h\n+ * \\brief Class and enums to represent colour spaces.\n+ */\n+\n+namespace libcamera {\n+\n+/**\n+ * \\class ColorSpace\n+ * \\brief Class to describe a color space.\n+ *\n+ * The color space class defines the encodings of the color primaries, the\n+ * transfer function associated with the color space, and the range (sometimes\n+ * also referred to as the quantisation) of the color space.\n+ *\n+ * Certain combinations of these fields form well-known standard color spaces,\n+ * such as \"JFIF\" or \"REC709\", though there is flexibility to leave some or all\n+ * of them undefined too.\n+ */\n+\n+/**\n+ * \\enum ColorSpace::Encoding\n+ * \\brief The encoding used for the color primaries.\n+ *\n+ * \\var ColorSpace::Encoding::UNDEFINED\n+ * \\brief The encoding for the colour primaries is not specified.\n+ * \\var ColorSpace::Encoding::RAW\n+ * \\brief These are raw colours from the sensor.\n+ * \\var ColorSpace::Encoding::REC601\n+ * \\brief REC601 colour primaries.\n+ * \\var ColorSpace::Encoding::REC709\n+ * \\brief Rec709 colour primaries.\n+ * \\var ColorSpace::Encoding::REC2020\n+ * \\brief REC2020 colour primaries.\n+ * \\var ColorSpace::Encoding::VIDEO\n+ * \\brief A place-holder for video streams which will be resolved to one\n+ * of REC601, REC709 or REC2020 once the video resolution is known.\n+ */\n+\n+/**\n+ * \\enum ColorSpace::TransferFunction\n+ * \\brief The transfer function used for this colour space.\n+ *\n+ * \\var ColorSpace::TransferFunction::UNDEFINED\n+ * \\brief The transfer function is not specified.\n+ * \\var ColorSpace::TransferFunction::IDENTITY\n+ * \\brief This color space uses an identity transfer function.\n+ * \\var ColorSpace::TransferFunction::SRGB\n+ * \\brief sRGB transfer function.\n+ * \\var ColorSpace::TransferFunction::REC709\n+ * \\brief Rec709 transfer function.\n+ */\n+\n+/**\n+ * \\enum ColorSpace::Range\n+ * \\brief The range (sometimes \"quantisation\") for this color space.\n+ *\n+ * \\var ColorSpace::Range::UNDEFINED\n+ * \\brief The range is not specified.\n+ * \\var ColorSpace::Range::FULL\n+ * \\brief This color space uses full range pixel values.\n+ * \\var ColorSpace::Range::LIMITED\n+ * \\brief This color space uses limited range pixel values.\n+ */\n+\n+/**\n+ * \\fn ColorSpace::ColorSpace(Encoding e, TransferFunction t, Range r)\n+ * \\brief Construct a ColorSpace from explicit values\n+ * \\param[in] e The encoding for the color primaries\n+ * \\param[in] t The transfer function for the color space\n+ * \\param[in] r The range of the pixel values in this color space\n+ */\n+\n+/**\n+ * \\fn ColorSpace::ColorSpace()\n+ * \\brief Construct a color space with undefined encoding, transfer function\n+ * and range\n+ */\n+\n+/**\n+ * \\fn ColorSpace::isFullyDefined() const\n+ * \\brief Return whether all the fields of the color space are defined.\n+ */\n+\n+/**\n+ * \\brief Assemble and return a readable string representation of the\n+ * ColorSpace\n+ * \\return A string describing the ColorSpace\n+ */\n+const std::string ColorSpace::toString() const\n+{\n+\tstatic const char *encodings[] = {\n+\t\t\"UNDEFINED\",\n+\t\t\"RAW\",\n+\t\t\"REC601\",\n+\t\t\"REC709\",\n+\t\t\"REC2020\",\n+\t};\n+\tstatic const char *transferFunctions[] = {\n+\t\t\"UNDEFINED\",\n+\t\t\"IDENTITY\",\n+\t\t\"SRGB\",\n+\t\t\"REC709\",\n+\t};\n+\tstatic const char *ranges[] = {\n+\t\t\"UNDEFINED\",\n+\t\t\"FULL\",\n+\t\t\"LIMITED\",\n+\t};\n+\n+\treturn std::string(encodings[static_cast(encoding)]) + \"+\" +\n+\t std::string(transferFunctions[static_cast(transferFunction)]) + \"+\" +\n+\t std::string(ranges[static_cast(range)]);\n+}\n+\n+/**\n+ * \\var ColorSpace::encoding\n+ * \\brief The encoding of the color primaries\n+ */\n+\n+/**\n+ * \\var ColorSpace::transferFunction\n+ * \\brief The transfer function for this color space.\n+ */\n+\n+/**\n+ * \\var ColorSpace::range\n+ * \\brief The pixel range used by this color space.\n+ */\n+\n+/**\n+ * \\var ColorSpace::UNDEFINED\n+ * \\brief A constant representing a fully undefined color space.\n+ */\n+\n+/**\n+ * \\var ColorSpace::RAW\n+ * \\brief A constant representing a raw color space (from a sensor).\n+ */\n+\n+/**\n+ * \\var ColorSpace::JFIF\n+ * \\brief A constant representing the JFIF color space usually used for\n+ * encoding JPEG images.\n+ */\n+\n+/**\n+ * \\var ColorSpace::SMPTE170M\n+ * \\brief A constant representing the SMPTE170M color space (sometimes also\n+ * referred to as \"full range BT601\").\n+ */\n+\n+/**\n+ * \\var ColorSpace::REC709\n+ * \\brief A constant representing the REC709 color space.\n+ */\n+\n+/**\n+ * \\var ColorSpace::REC2020\n+ * \\brief A constant representing the REC2020 color space.\n+ */\n+\n+/**\n+ * \\var ColorSpace::VIDEO\n+ * \\brief A constant that video streams can use to indicate the \"default\"\n+ * color space for a video of this resolution, once that is is known. For\n+ * exmample, SD streams would interpret this as SMPTE170M, HD streams as\n+ * REC709 and ultra HD as REC2020.\n+ */\n+\n+} /* namespace libcamera */\ndiff --git a/src/libcamera/meson.build b/src/libcamera/meson.build\nindex 4f085801..e0748840 100644\n--- a/src/libcamera/meson.build\n+++ b/src/libcamera/meson.build\n@@ -8,6 +8,7 @@ libcamera_sources = files([\n 'camera_manager.cpp',\n 'camera_sensor.cpp',\n 'camera_sensor_properties.cpp',\n+ 'color_space.cpp',\n 'controls.cpp',\n 'control_serializer.cpp',\n 'control_validator.cpp',\n","prefixes":["libcamera-devel","1/3"]}