{"id":1322,"url":"https://patchwork.libcamera.org/api/patches/1322/?format=json","web_url":"https://patchwork.libcamera.org/patch/1322/","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":"<20190527223540.21855-5-paul.elder@ideasonboard.com>","date":"2019-05-27T22:35:36","name":"[libcamera-devel,4/8] libcamera: ipa_module: allow instantiation of IPAInterface","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"9b69186170a155f2b11b1608ddb7ecfacac0775d","submitter":{"id":17,"url":"https://patchwork.libcamera.org/api/people/17/?format=json","name":"Paul Elder","email":"paul.elder@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/1322/mbox/","series":[{"id":330,"url":"https://patchwork.libcamera.org/api/series/330/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=330","date":"2019-05-27T22:35:32","name":"Add IPAManager and IPAInterface","version":1,"mbox":"https://patchwork.libcamera.org/series/330/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/1322/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/1322/checks/","tags":{},"headers":{"Return-Path":"","Received":["from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 9427C618F8\n\tfor ;\n\tTue, 28 May 2019 00:35:50 +0200 (CEST)","from localhost.localdomain (unknown [96.44.9.117])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id D01E3D85;\n\tTue, 28 May 2019 00:35:49 +0200 (CEST)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1558996550;\n\tbh=7czLoM6h4CXiFdcVKIGsV6OgYRIV/mBVwKekKrgqENQ=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=oHmMQOw3k0UT4HXoCUlPQoOWhbamLdcIGE7bS6/hL6H2c5rFtqbFe4U9rjIj82Cu+\n\tycbG0S4KFaJTVJxqn+eRzr57knB/9dhCfWjozqtG+BQm6eWhkBJzhDteGT4tc9ydjY\n\tH36IsSYOP/manM86hp9Rl7vunFcjmJkTMM8pvLMw=","From":"Paul Elder ","To":"libcamera-devel@lists.libcamera.org","Date":"Mon, 27 May 2019 18:35:36 -0400","Message-Id":"<20190527223540.21855-5-paul.elder@ideasonboard.com>","X-Mailer":"git-send-email 2.20.1","In-Reply-To":"<20190527223540.21855-1-paul.elder@ideasonboard.com>","References":"<20190527223540.21855-1-paul.elder@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH 4/8] libcamera: ipa_module: allow\n\tinstantiation of IPAInterface","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.23","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","X-List-Received-Date":"Mon, 27 May 2019 22:35:51 -0000"},"content":"Add functions for loading the IPAInterface factory function from an IPA\nmodule shared object, and for creating an instance of an IPAInterface.\nThese functions will be used by IPAManager, from which a PipelineHandler\nwill request an IPAInterface.\n\nAlso update meson to add the \"-ldl\" linker argument, to allow loading of\nthe factory function from a shared object.\n\nSigned-off-by: Paul Elder \n---\n src/libcamera/include/ipa_module.h | 15 +++++-\n src/libcamera/ipa_module.cpp | 80 ++++++++++++++++++++++++++++--\n src/libcamera/meson.build | 3 +-\n 3 files changed, 92 insertions(+), 6 deletions(-)","diff":"diff --git a/src/libcamera/include/ipa_module.h b/src/libcamera/include/ipa_module.h\nindex a4c6dbd..bb03407 100644\n--- a/src/libcamera/include/ipa_module.h\n+++ b/src/libcamera/include/ipa_module.h\n@@ -7,9 +7,10 @@\n #ifndef __LIBCAMERA_IPA_MODULE_H__\n #define __LIBCAMERA_IPA_MODULE_H__\n \n-#include \n-\n+#include \n #include \n+#include \n+#include \n \n namespace libcamera {\n \n@@ -17,16 +18,26 @@ class IPAModule\n {\n public:\n \texplicit IPAModule(const std::string &libPath);\n+\t~IPAModule();\n \n \tbool isValid() const;\n \n \tconst struct IPAModuleInfo &info() const;\n \n+\tbool load();\n+\n+\tstd::unique_ptr createInstance();\n+\n private:\n \tstruct IPAModuleInfo info_;\n \n \tstd::string libPath_;\n \tbool valid_;\n+\tbool loaded_;\n+\n+\tvoid *dlhandle_;\n+\ttypedef IPAInterface *(*ipaiFactory)(void);\n+\tipaiFactory ipaCreate_;\n \n \tint loadIPAModuleInfo();\n };\ndiff --git a/src/libcamera/ipa_module.cpp b/src/libcamera/ipa_module.cpp\nindex 6e68934..9bb0594 100644\n--- a/src/libcamera/ipa_module.cpp\n+++ b/src/libcamera/ipa_module.cpp\n@@ -7,6 +7,7 @@\n \n #include \"ipa_module.h\"\n \n+#include \n #include \n #include \n #include \n@@ -242,13 +243,11 @@ int elfLoadSymbol(void *dst, size_t size, void *map, size_t soSize,\n * The IPA module shared object file must be of the same endianness and\n * bitness as libcamera.\n *\n- * \\todo load funtions from the IPA to be used by pipelines\n- *\n * The caller shall call the isValid() method after constructing an\n * IPAModule instance to verify the validity of the IPAModule.\n */\n IPAModule::IPAModule(const std::string &libPath)\n-\t: libPath_(libPath), valid_(false)\n+\t: libPath_(libPath), valid_(false), loaded_(false)\n {\n \tif (loadIPAModuleInfo() < 0)\n \t\treturn;\n@@ -256,6 +255,12 @@ IPAModule::IPAModule(const std::string &libPath)\n \tvalid_ = true;\n }\n \n+IPAModule::~IPAModule()\n+{\n+\tif (dlhandle_)\n+\t\tdlclose(dlhandle_);\n+}\n+\n int IPAModule::loadIPAModuleInfo()\n {\n \tint fd = open(libPath_.c_str(), O_RDONLY);\n@@ -325,4 +330,73 @@ const struct IPAModuleInfo &IPAModule::info() const\n \treturn info_;\n }\n \n+/**\n+ * \\brief Load the IPA implementation factory from the shared object\n+ *\n+ * The IPA module shared object implements an IPAInterface class to be used\n+ * by pipeline handlers. This function loads the factory function from the\n+ * shared object. Later, createInstance() can be called to instantiate the\n+ * IPAInterface.\n+ *\n+ * This function only needs to be called successfully once, after which\n+ * createInstance can be called as many times as IPAInterface instances are\n+ * needed.\n+ *\n+ * Calling this function on an invalid module (as returned by isValid()) is\n+ * an error.\n+ *\n+ * \\return true if load was successful, or already loaded, and false otherwise\n+ */\n+bool IPAModule::load()\n+{\n+\tif (!valid_)\n+\t\treturn false;\n+\n+\tif (loaded_)\n+\t\treturn true;\n+\n+\tdlhandle_ = dlopen(libPath_.c_str(), RTLD_LAZY);\n+\tif (!dlhandle_) {\n+\t\tLOG(IPAModule, Error) << \"Failed to open IPA module shared object\"\n+\t\t\t\t << dlerror();\n+\t\treturn false;\n+\t}\n+\n+\tvoid *symbol = dlsym(dlhandle_, \"ipaCreate\");\n+\tif (!symbol) {\n+\t\tLOG(IPAModule, Error) << \"Failed to load ipaCreate() from IPA module shared object\"\n+\t\t\t\t << dlerror();\n+\t\tdlclose(dlhandle_);\n+\t\treturn false;\n+\t}\n+\n+\tipaCreate_ = (ipaiFactory)symbol;\n+\n+\tloaded_ = true;\n+\n+\treturn true;\n+}\n+\n+/**\n+ * \\brief Instantiate an IPAInterface\n+ *\n+ * After the IPAInterface implementation factory has been loaded (with load()),\n+ * an instance can be created with this function.\n+ *\n+ * Calling this function on a module that has not yet been loaded, or an\n+ * invalid module (as returned by load() and isValid(), respectively) is\n+ * an error.\n+ *\n+ * \\return the IPA implementation as a new IPAInterface instance\n+ */\n+std::unique_ptr IPAModule::createInstance()\n+{\n+\tif (!valid_ || !loaded_)\n+\t\treturn nullptr;\n+\n+\tstd::unique_ptr ipai(ipaCreate_());\n+\n+\treturn ipai;\n+}\n+\n } /* namespace libcamera */\ndiff --git a/src/libcamera/meson.build b/src/libcamera/meson.build\nindex 07335e5..32f7da4 100644\n--- a/src/libcamera/meson.build\n+++ b/src/libcamera/meson.build\n@@ -65,7 +65,8 @@ libcamera = shared_library('camera',\n libcamera_sources,\n install : true,\n include_directories : includes,\n- dependencies : libudev)\n+ dependencies : libudev,\n+ link_args : '-ldl')\n \n libcamera_dep = declare_dependency(sources : [libcamera_api, libcamera_h],\n include_directories : libcamera_includes,\n","prefixes":["libcamera-devel","4/8"]}