{"id":9430,"url":"https://patchwork.libcamera.org/api/1.1/patches/9430/?format=json","web_url":"https://patchwork.libcamera.org/patch/9430/","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":"<20200829115429.30010-5-david.plowman@raspberrypi.com>","date":"2020-08-29T11:54:25","name":"[libcamera-devel,v5,4/8] libcamera: Allow Bayer pixel formats to be transformed","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"2ab90af75f8c709a234f9d1d9efdfb07312c1891","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/9430/mbox/","series":[{"id":1252,"url":"https://patchwork.libcamera.org/api/1.1/series/1252/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1252","date":"2020-08-29T11:54:21","name":"2D transforms","version":5,"mbox":"https://patchwork.libcamera.org/series/1252/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/9430/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/9430/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 0029BBF019\n\tfor ;\n\tSat, 29 Aug 2020 11:54:41 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id BA7CC6037D;\n\tSat, 29 Aug 2020 13:54:41 +0200 (CEST)","from mail-wm1-x344.google.com (mail-wm1-x344.google.com\n\t[IPv6:2a00:1450:4864:20::344])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id DFA2162919\n\tfor ;\n\tSat, 29 Aug 2020 13:54:37 +0200 (CEST)","by mail-wm1-x344.google.com with SMTP id z9so1426025wmk.1\n\tfor ;\n\tSat, 29 Aug 2020 04:54:37 -0700 (PDT)","from pi4-davidp.lan (plowpeople3.plus.com. 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12:54:25 +0100","Message-Id":"<20200829115429.30010-5-david.plowman@raspberrypi.com>","X-Mailer":"git-send-email 2.20.1","In-Reply-To":"<20200829115429.30010-1-david.plowman@raspberrypi.com>","References":"<20200829115429.30010-1-david.plowman@raspberrypi.com>","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH v5 4/8] libcamera: Allow Bayer pixel\n\tformats to be transformed","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","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Add a transform method to the V4L2PixelFormat class which allows Bayer\nformats to be re-ordered into a different Bayer order when horizontal\nor vertical flips are requested from the sensor.\n\nSigned-off-by: David Plowman \n---\n include/libcamera/internal/v4l2_pixelformat.h | 3 +\n src/libcamera/v4l2_pixelformat.cpp | 94 ++++++++++++++++++-\n 2 files changed, 96 insertions(+), 1 deletion(-)","diff":"diff --git a/include/libcamera/internal/v4l2_pixelformat.h b/include/libcamera/internal/v4l2_pixelformat.h\nindex 9bfd81a..cddac86 100644\n--- a/include/libcamera/internal/v4l2_pixelformat.h\n+++ b/include/libcamera/internal/v4l2_pixelformat.h\n@@ -14,6 +14,7 @@\n #include \n \n #include \n+#include \n \n namespace libcamera {\n \n@@ -40,6 +41,8 @@ public:\n \tstatic V4L2PixelFormat fromPixelFormat(const PixelFormat &pixelFormat,\n \t\t\t\t\t bool multiplanar);\n \n+\tV4L2PixelFormat transform(Transform t) const;\n+\n private:\n \tuint32_t fourcc_;\n };\ndiff --git a/src/libcamera/v4l2_pixelformat.cpp b/src/libcamera/v4l2_pixelformat.cpp\nindex 30c94bb..28bcd51 100644\n--- a/src/libcamera/v4l2_pixelformat.cpp\n+++ b/src/libcamera/v4l2_pixelformat.cpp\n@@ -101,6 +101,62 @@ const std::map vpf2pf{\n \t{ V4L2PixelFormat(V4L2_PIX_FMT_MJPEG), formats::MJPEG },\n };\n \n+/* Table giving the result of applying an hflip to each Bayer pixel format. */\n+const std::map hflipTable{\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR8), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG8), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG8), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB8), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10P), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10P), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10P), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10P), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12P), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12P), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12P), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12P), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR16), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG16) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG16), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR16) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG16), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB16) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB16), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG16) },\n+};\n+\n+/* Table giving the result of applying a vflip to each Bayer pixel format. */\n+const std::map vflipTable{\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR8), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG8), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG8), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB8), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG8) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10P), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10P), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG10P), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB10P), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG10P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12P), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12P), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG12P), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB12P), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG12P) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SBGGR16), V4L2PixelFormat(V4L2_PIX_FMT_SGRBG16) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGBRG16), V4L2PixelFormat(V4L2_PIX_FMT_SRGGB16) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SGRBG16), V4L2PixelFormat(V4L2_PIX_FMT_SBGGR16) },\n+\t{ V4L2PixelFormat(V4L2_PIX_FMT_SRGGB16), V4L2PixelFormat(V4L2_PIX_FMT_SGBRG16) },\n+};\n+\n } /* namespace */\n \n /**\n@@ -113,7 +169,7 @@ const std::map vpf2pf{\n \n /**\n * \\fn V4L2PixelFormat::V4L2PixelFormat(uint32_t fourcc)\n- * \\brief Construct a V4L2PixelFormat from a FourCC value\n+p * \\brief Construct a V4L2PixelFormat from a FourCC value\n * \\param[in] fourcc The pixel format FourCC numerical value\n */\n \n@@ -205,4 +261,40 @@ V4L2PixelFormat V4L2PixelFormat::fromPixelFormat(const PixelFormat &pixelFormat,\n \treturn info.v4l2Format;\n }\n \n+/**\n+ * \\brief Transform a Bayer V4L2PixelFormat.\n+ * \\param[in] t The Transform to be applied to the pixel format.\n+ *\n+ * Some sensors that produce Bayer V4L2PixelFormats may change their Bayer\n+ * order when the V4L2_CID_HFLIP or V4L2_CID_VFLIP controls are applied to the\n+ * device. For such sensors, this function computes the new V4L2PixelFormat\n+ * for the transformed Bayer order.\n+ *\n+ * Transposes are ignored as sensors do not implement them.\n+ *\n+ * \\return The Bayer V4L2PixelFormat resulting from applying transform \\a t\n+ * to the given V4L2PixelFormat.\n+ */\n+V4L2PixelFormat V4L2PixelFormat::transform(Transform t) const\n+{\n+\tV4L2PixelFormat result = *this;\n+\n+\tif (!!(t & Transform::HFlip)) {\n+\t\tconst auto iter = hflipTable.find(*this);\n+\t\tif (iter == hflipTable.end()) {\n+\t\t\tLOG(V4L2, Warning)\n+\t\t\t\t<< \"Cannot transpose V4L2 pixel format \"\n+\t\t\t\t<< toString();\n+\t\t\treturn V4L2PixelFormat();\n+\t\t}\n+\t\tresult = iter->second;\n+\t}\n+\n+\t/* This will be found as the tables have the same keys. */\n+\tif (!!(t & Transform::VFlip))\n+\t\tresult = vflipTable.find(result)->second;\n+\n+\treturn result;\n+}\n+\n } /* namespace libcamera */\n","prefixes":["libcamera-devel","v5","4/8"]}