[{"id":25702,"web_url":"https://patchwork.libcamera.org/comment/25702/","msgid":"","date":"2022-11-01T11:43:39","subject":"Re: [libcamera-devel] [PATCH v1 01/10] libcamera: pipeline: Add a\n\tplatform configuration file helper","submitter":{"id":42,"url":"https://patchwork.libcamera.org/api/people/42/","name":"David Plowman","email":"david.plowman@raspberrypi.com"},"content":"Hi Naush\n\nThanks for this patch!\n\nOn Fri, 14 Oct 2022 at 14:18, Naushir Patuck via libcamera-devel\n wrote:\n>\n> Add a new helper function PipelineHandler::configurationFile() that returns\n> the full path of a named configuration file. This configuration file may be read\n> by pipeline handlers for platform specific configuration parameters on\n> initialisation.\n>\n> The mechanism for searching for the configuration file is similar to the IPA\n> configuration file:\n>\n> - In the source tree if libcamera is not installed\n> - Otherwise in standard system locations (etc and share directories).\n>\n> When stored in the source tree, configuration files shall be located in a 'data'\n> subdirectory of their respective pipeline handler directory.\n>\n> Signed-off-by: Naushir Patuck \n> ---\n> include/libcamera/internal/pipeline_handler.h | 2 +\n> src/libcamera/pipeline_handler.cpp | 57 +++++++++++++++++++\n> 2 files changed, 59 insertions(+)\n>\n> diff --git a/include/libcamera/internal/pipeline_handler.h b/include/libcamera/internal/pipeline_handler.h\n> index b6139a88d421..6648975f15de 100644\n> --- a/include/libcamera/internal/pipeline_handler.h\n> +++ b/include/libcamera/internal/pipeline_handler.h\n> @@ -74,6 +74,8 @@ protected:\n> virtual int queueRequestDevice(Camera *camera, Request *request) = 0;\n> virtual void stopDevice(Camera *camera) = 0;\n>\n> + std::string configurationFile(const std::string &name) const;\n> +\n> CameraManager *manager_;\n>\n> private:\n> diff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp\n> index 588a3db30e82..998dcece05f2 100644\n> --- a/src/libcamera/pipeline_handler.cpp\n> +++ b/src/libcamera/pipeline_handler.cpp\n> @@ -8,6 +8,7 @@\n> #include \"libcamera/internal/pipeline_handler.h\"\n>\n> #include \n> +#include \n> #include \n>\n> #include \n> @@ -625,6 +626,62 @@ void PipelineHandler::disconnect()\n> }\n> }\n>\n> +/**\n> + * \\brief Retrieve the absolute path to a platform configuration file\n> + * \\param[in] name The configuration file name\n> + *\n> + * This function locates a named platform configuration file and returns\n> + * its absolute path to the pipeline handler. It searches the following\n> + * directories, in order:\n> + *\n> + * - If libcamera is not installed, the src/libcamera/pipeline/ directory within\n> + * the source tree ; otherwise\n> + * - The system data (share/libcamera/pipeline/) directory.\n> + *\n> + * The system directories are not searched if libcamera is not installed.\n> + *\n> + * \\return The full path to the pipeline handler configuration file, or an empty\n> + * string if no configuration file can be found\n> + */\n> +std::string PipelineHandler::configurationFile(const std::string &name) const\n> +{\n> + struct stat statbuf;\n> + int ret;\n> +\n> + std::string root = utils::libcameraSourcePath();\n> + if (!root.empty()) {\n> + /*\n> + * When libcamera is used before it is installed, load\n> + * configuration files from the source directory. The\n> + * configuration files are then located in the 'data'\n> + * subdirectory of the corresponding IPA module.\n> + */\n> + std::string confDir = root + \"src/libcamera/pipeline/data\";\n> +\n> + LOG(Pipeline, Info)\n> + << \"libcamera is not installed. Loading platform configuration file from '\"\n> + << confDir << \"'\";\n> +\n> + std::string confPath = confDir + \"/\" + name;\n> + ret = stat(confPath.c_str(), &statbuf);\n> + if (ret == 0 && (statbuf.st_mode & S_IFMT) == S_IFREG)\n\nI guess I was just wondering slightly whether this is worth checking\ngiven that we fail with a helpful message anyway if we can't open the\nfile, but it's fine like this too, so probably just ignore me!\n\nReviewed-by: David Plowman \n\nThanks!\nDavid\n\n> + return confPath;\n> +\n> + } else {\n> + /* Else look in the system locations. */\n> + std::string confPath = std::string(LIBCAMERA_DATA_DIR) + \"/pipeline/\" + name;\n> + ret = stat(confPath.c_str(), &statbuf);\n> + if (ret == 0 && (statbuf.st_mode & S_IFMT) == S_IFREG)\n> + return confPath;\n> + }\n> +\n> + LOG(Pipeline, Error)\n> + << \"Configuration file '\" << name\n> + << \"' not found for pipeline handler '\" << PipelineHandler::name() << \"'\";\n> +\n> + return std::string();\n> +}\n> +\n> /**\n> * \\var PipelineHandler::manager_\n> * \\brief The Camera manager associated with the pipeline handler\n> --\n> 2.25.1\n>","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 794E2BDB16\n\tfor ;\n\tTue, 1 Nov 2022 11:43:55 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id C13A16303F;\n\tTue, 1 Nov 2022 12:43:54 +0100 (CET)","from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com\n\t[IPv6:2607:f8b0:4864:20::1032])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id BAC2A63009\n\tfor ;\n\tTue, 1 Nov 2022 12:43:52 +0100 (CET)","by mail-pj1-x1032.google.com with SMTP id gw22so5219pjb.3\n\tfor ;\n\tTue, 01 Nov 2022 04:43:52 -0700 (PDT)"],"DKIM-Signature":["v=1; 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charset=\"UTF-8\"","Subject":"Re: [libcamera-devel] [PATCH v1 01/10] libcamera: pipeline: Add a\n\tplatform configuration file helper","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","From":"David Plowman via libcamera-devel ","Reply-To":"David Plowman ","Cc":"libcamera-devel@lists.libcamera.org","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":25921,"web_url":"https://patchwork.libcamera.org/comment/25921/","msgid":"","date":"2022-11-29T10:20:51","subject":"Re: [libcamera-devel] [PATCH v1 01/10] libcamera: pipeline: Add a\n\tplatform configuration file helper","submitter":{"id":34,"url":"https://patchwork.libcamera.org/api/people/34/","name":"Naushir Patuck","email":"naush@raspberrypi.com"},"content":"Hi David,\n\nThank you for your feedback!\n\nOn Tue, 1 Nov 2022 at 11:43, David Plowman \nwrote:\n\n> Hi Naush\n>\n> Thanks for this patch!\n>\n> On Fri, 14 Oct 2022 at 14:18, Naushir Patuck via libcamera-devel\n> wrote:\n> >\n> > Add a new helper function PipelineHandler::configurationFile() that\n> returns\n> > the full path of a named configuration file. This configuration file may\n> be read\n> > by pipeline handlers for platform specific configuration parameters on\n> > initialisation.\n> >\n> > The mechanism for searching for the configuration file is similar to the\n> IPA\n> > configuration file:\n> >\n> > - In the source tree if libcamera is not installed\n> > - Otherwise in standard system locations (etc and share directories).\n> >\n> > When stored in the source tree, configuration files shall be located in\n> a 'data'\n> > subdirectory of their respective pipeline handler directory.\n> >\n> > Signed-off-by: Naushir Patuck \n> > ---\n> > include/libcamera/internal/pipeline_handler.h | 2 +\n> > src/libcamera/pipeline_handler.cpp | 57 +++++++++++++++++++\n> > 2 files changed, 59 insertions(+)\n> >\n> > diff --git a/include/libcamera/internal/pipeline_handler.h\n> b/include/libcamera/internal/pipeline_handler.h\n> > index b6139a88d421..6648975f15de 100644\n> > --- a/include/libcamera/internal/pipeline_handler.h\n> > +++ b/include/libcamera/internal/pipeline_handler.h\n> > @@ -74,6 +74,8 @@ protected:\n> > virtual int queueRequestDevice(Camera *camera, Request *request)\n> = 0;\n> > virtual void stopDevice(Camera *camera) = 0;\n> >\n> > + std::string configurationFile(const std::string &name) const;\n> > +\n> > CameraManager *manager_;\n> >\n> > private:\n> > diff --git a/src/libcamera/pipeline_handler.cpp\n> b/src/libcamera/pipeline_handler.cpp\n> > index 588a3db30e82..998dcece05f2 100644\n> > --- a/src/libcamera/pipeline_handler.cpp\n> > +++ b/src/libcamera/pipeline_handler.cpp\n> > @@ -8,6 +8,7 @@\n> > #include \"libcamera/internal/pipeline_handler.h\"\n> >\n> > #include \n> > +#include \n> > #include \n> >\n> > #include \n> > @@ -625,6 +626,62 @@ void PipelineHandler::disconnect()\n> > }\n> > }\n> >\n> > +/**\n> > + * \\brief Retrieve the absolute path to a platform configuration file\n> > + * \\param[in] name The configuration file name\n> > + *\n> > + * This function locates a named platform configuration file and returns\n> > + * its absolute path to the pipeline handler. It searches the following\n> > + * directories, in order:\n> > + *\n> > + * - If libcamera is not installed, the src/libcamera/pipeline/\n> directory within\n> > + * the source tree ; otherwise\n> > + * - The system data (share/libcamera/pipeline/) directory.\n> > + *\n> > + * The system directories are not searched if libcamera is not\n> installed.\n> > + *\n> > + * \\return The full path to the pipeline handler configuration file, or\n> an empty\n> > + * string if no configuration file can be found\n> > + */\n> > +std::string PipelineHandler::configurationFile(const std::string &name)\n> const\n> > +{\n> > + struct stat statbuf;\n> > + int ret;\n> > +\n> > + std::string root = utils::libcameraSourcePath();\n> > + if (!root.empty()) {\n> > + /*\n> > + * When libcamera is used before it is installed, load\n> > + * configuration files from the source directory. The\n> > + * configuration files are then located in the 'data'\n> > + * subdirectory of the corresponding IPA module.\n> > + */\n> > + std::string confDir = root +\n> \"src/libcamera/pipeline/data\";\n> > +\n> > + LOG(Pipeline, Info)\n> > + << \"libcamera is not installed. Loading platform\n> configuration file from '\"\n> > + << confDir << \"'\";\n> > +\n> > + std::string confPath = confDir + \"/\" + name;\n> > + ret = stat(confPath.c_str(), &statbuf);\n> > + if (ret == 0 && (statbuf.st_mode & S_IFMT) == S_IFREG)\n>\n> I guess I was just wondering slightly whether this is worth checking\n> given that we fail with a helpful message anyway if we can't open the\n> file, but it's fine like this too, so probably just ignore me!\n>\n\nThis function is (mostly) a duplicate of what is used for the tuning file,\nso I'll probably leave this check in to be consistent.\n\nRegards,\nNaush\n\n\n>\n> Reviewed-by: David Plowman \n>\n> Thanks!\n> David\n>\n> > + return confPath;\n> > +\n> > + } else {\n> > + /* Else look in the system locations. */\n> > + std::string confPath = std::string(LIBCAMERA_DATA_DIR) +\n> \"/pipeline/\" + name;\n> > + ret = stat(confPath.c_str(), &statbuf);\n> > + if (ret == 0 && (statbuf.st_mode & S_IFMT) == S_IFREG)\n> > + return confPath;\n> > + }\n> > +\n> > + LOG(Pipeline, Error)\n> > + << \"Configuration file '\" << name\n> > + << \"' not found for pipeline handler '\" <<\n> PipelineHandler::name() << \"'\";\n> > +\n> > + return std::string();\n> > +}\n> > +\n> > /**\n> > * \\var PipelineHandler::manager_\n> > * \\brief The Camera manager associated with the pipeline handler\n> > --\n> > 2.25.1\n> >\n>","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 CB4E1BDE6B\n\tfor ;\n\tTue, 29 Nov 2022 10:21:09 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 2071A6333A;\n\tTue, 29 Nov 2022 11:21:09 +0100 (CET)","from mail-il1-x136.google.com (mail-il1-x136.google.com\n\t[IPv6:2607:f8b0:4864:20::136])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 0B32863314\n\tfor ;\n\tTue, 29 Nov 2022 11:21:07 +0100 (CET)","by mail-il1-x136.google.com with SMTP id o13so6379738ilc.7\n\tfor ;\n\tTue, 29 Nov 2022 02:21:06 -0800 (PST)"],"DKIM-Signature":["v=1; 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boundary=\"0000000000008092a805ee995835\"","Subject":"Re: [libcamera-devel] [PATCH v1 01/10] libcamera: pipeline: Add a\n\tplatform configuration file helper","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","From":"Naushir Patuck via libcamera-devel\n\t","Reply-To":"Naushir Patuck ","Cc":"libcamera-devel@lists.libcamera.org","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}}]