{"id":14800,"url":"https://patchwork.libcamera.org/api/patches/14800/?format=json","web_url":"https://patchwork.libcamera.org/patch/14800/","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":"<20211126104045.4756-5-david.plowman@raspberrypi.com>","date":"2021-11-26T10:40:42","name":"[libcamera-devel,v7,4/7] libcamera: Support passing ColorSpaces to V4L2 video devices","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"2f0bfb63714ea8b0462c4c1fdc0c06944427fd07","submitter":{"id":42,"url":"https://patchwork.libcamera.org/api/people/42/?format=json","name":"David Plowman","email":"david.plowman@raspberrypi.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/14800/mbox/","series":[{"id":2761,"url":"https://patchwork.libcamera.org/api/series/2761/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=2761","date":"2021-11-26T10:40:38","name":"Colour spaces","version":7,"mbox":"https://patchwork.libcamera.org/series/2761/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/14800/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/14800/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 989A6BF415\n\tfor ;\n\tFri, 26 Nov 2021 10:41:08 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 229A76056D;\n\tFri, 26 Nov 2021 11:41:07 +0100 (CET)","from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com\n\t[IPv6:2a00:1450:4864:20::42a])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 51528604FD\n\tfor ;\n\tFri, 26 Nov 2021 11:41:02 +0100 (CET)","by mail-wr1-x42a.google.com with SMTP id t9so714908wrx.7\n\tfor ;\n\tFri, 26 Nov 2021 02:41:02 -0800 (PST)","from pi4-davidp.pitowers.org\n\t([2a00:1098:3142:14:e4a2:3070:eea4:e434])\n\tby smtp.gmail.com with ESMTPSA id\n\ty7sm5106795wrw.55.2021.11.26.02.41.01\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tFri, 26 Nov 2021 02:41:01 -0800 (PST)"],"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=\"rOQjdL/U\"; 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\n\tFri, 26 Nov 2021 02:41:01 -0800 (PST)","From":"David Plowman ","To":"Laurent Pinchart ,\n\tKieran Bingham ,\n\tHans Verkuil , Tomasz Figa , \n\tJacopo Mondi ,\n\tNaushir Patuck , \n\tlibcamera-devel@lists.libcamera.org","Date":"Fri, 26 Nov 2021 10:40:42 +0000","Message-Id":"<20211126104045.4756-5-david.plowman@raspberrypi.com>","X-Mailer":"git-send-email 2.30.2","In-Reply-To":"<20211126104045.4756-1-david.plowman@raspberrypi.com>","References":"<20211126104045.4756-1-david.plowman@raspberrypi.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v7 4/7] libcamera: Support passing\n\tColorSpaces to V4L2 video devices","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 ColorSpace from the StreamConfiguration is now handled\nappropriately in the V4L2VideoDevice.\n\nSigned-off-by: David Plowman \n---\n include/libcamera/internal/v4l2_videodevice.h | 2 ++\n src/libcamera/v4l2_videodevice.cpp | 32 +++++++++++++++++++\n 2 files changed, 34 insertions(+)","diff":"diff --git a/include/libcamera/internal/v4l2_videodevice.h b/include/libcamera/internal/v4l2_videodevice.h\nindex 4a44b7fd..602f40fb 100644\n--- a/include/libcamera/internal/v4l2_videodevice.h\n+++ b/include/libcamera/internal/v4l2_videodevice.h\n@@ -20,6 +20,7 @@\n #include \n #include \n \n+#include \n #include \n #include \n #include \n@@ -167,6 +168,7 @@ public:\n \n \tV4L2PixelFormat fourcc;\n \tSize size;\n+\tstd::optional colorSpace;\n \n \tstd::array planes;\n \tunsigned int planesCount = 0;\ndiff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp\nindex 4f04212d..c8f78602 100644\n--- a/src/libcamera/v4l2_videodevice.cpp\n+++ b/src/libcamera/v4l2_videodevice.cpp\n@@ -383,6 +383,21 @@ bool V4L2BufferCache::Entry::operator==(const FrameBuffer &buffer) const\n * that identifies the image format pixel encoding scheme.\n */\n \n+/**\n+ * \\var V4L2DeviceFormat::colorSpace\n+ * \\brief The color space of the pixels\n+ *\n+ * The color space of the image. When setting the format this may be\n+ * unset, in which case the driver gets to use its default color space.\n+ * After being set, this value should contain the color space that\n+ * was actually used. If this value is unset, then the color space chosen\n+ * by the driver could not be represented by the ColorSpace class (and\n+ * should probably be added).\n+ *\n+ * It is up to the pipeline handler or application to check if the\n+ * resulting color space is acceptable.\n+ */\n+\n /**\n * \\var V4L2DeviceFormat::planes\n * \\brief The per-plane memory size information\n@@ -878,6 +893,7 @@ int V4L2VideoDevice::getFormatMultiplane(V4L2DeviceFormat *format)\n \tformat->size.height = pix->height;\n \tformat->fourcc = V4L2PixelFormat(pix->pixelformat);\n \tformat->planesCount = pix->num_planes;\n+\tformat->colorSpace = toColorSpace(*pix);\n \n \tfor (unsigned int i = 0; i < format->planesCount; ++i) {\n \t\tformat->planes[i].bpl = pix->plane_fmt[i].bytesperline;\n@@ -900,6 +916,12 @@ int V4L2VideoDevice::trySetFormatMultiplane(V4L2DeviceFormat *format, bool set)\n \tpix->num_planes = format->planesCount;\n \tpix->field = V4L2_FIELD_NONE;\n \n+\tret = fromColorSpace(format->colorSpace, *pix);\n+\tif (ret < 0)\n+\t\tLOG(V4L2, Warning)\n+\t\t\t<< \"Setting color space unrecognised by V4L2: \"\n+\t\t\t<< ColorSpace::toString(format->colorSpace);\n+\n \tASSERT(pix->num_planes <= std::size(pix->plane_fmt));\n \n \tfor (unsigned int i = 0; i < pix->num_planes; ++i) {\n@@ -927,6 +949,7 @@ int V4L2VideoDevice::trySetFormatMultiplane(V4L2DeviceFormat *format, bool set)\n \t\tformat->planes[i].bpl = pix->plane_fmt[i].bytesperline;\n \t\tformat->planes[i].size = pix->plane_fmt[i].sizeimage;\n \t}\n+\tformat->colorSpace = toColorSpace(*pix);\n \n \treturn 0;\n }\n@@ -950,6 +973,7 @@ int V4L2VideoDevice::getFormatSingleplane(V4L2DeviceFormat *format)\n \tformat->planesCount = 1;\n \tformat->planes[0].bpl = pix->bytesperline;\n \tformat->planes[0].size = pix->sizeimage;\n+\tformat->colorSpace = toColorSpace(*pix);\n \n \treturn 0;\n }\n@@ -966,6 +990,13 @@ int V4L2VideoDevice::trySetFormatSingleplane(V4L2DeviceFormat *format, bool set)\n \tpix->pixelformat = format->fourcc;\n \tpix->bytesperline = format->planes[0].bpl;\n \tpix->field = V4L2_FIELD_NONE;\n+\n+\tret = fromColorSpace(format->colorSpace, *pix);\n+\tif (ret < 0)\n+\t\tLOG(V4L2, Warning)\n+\t\t\t<< \"Set color space unrecognised by V4L2: \"\n+\t\t\t<< ColorSpace::toString(format->colorSpace);\n+\n \tret = ioctl(set ? VIDIOC_S_FMT : VIDIOC_TRY_FMT, &v4l2Format);\n \tif (ret) {\n \t\tLOG(V4L2, Error)\n@@ -984,6 +1015,7 @@ int V4L2VideoDevice::trySetFormatSingleplane(V4L2DeviceFormat *format, bool set)\n \tformat->planesCount = 1;\n \tformat->planes[0].bpl = pix->bytesperline;\n \tformat->planes[0].size = pix->sizeimage;\n+\tformat->colorSpace = toColorSpace(*pix);\n \n \treturn 0;\n }\n","prefixes":["libcamera-devel","v7","4/7"]}