From 7fa98a4cdd296c86fe053ab17486c1e0e2a72e90 Mon Sep 17 00:00:00 2001 From: Paul Elder Date: Mon, 3 Jun 2019 13:19:44 -0400 Subject: libcamera: ipa_manager: implement class for managing IPA modules IPAManager is a class that will search in given directories for IPA modules, and will load them into a list. It also provides an interface for pipeline handlers to acquire an IPA. A meson build file for the IPAs is added, which also specifies a hard-coded path for where to load the IPAs from in the installation directory. More paths can be specified with the environment variable LIBCAMERA_IPA_MODULE_PATH, with the same syntax as the regular PATH environment variable. Make the test framework set this environment variable. Signed-off-by: Paul Elder Reviewed-by: Laurent Pinchart --- src/ipa/meson.build | 2 + src/libcamera/include/ipa_manager.h | 40 ++++++++++ src/libcamera/ipa_manager.cpp | 149 ++++++++++++++++++++++++++++++++++++ src/libcamera/meson.build | 2 + src/meson.build | 1 + 5 files changed, 194 insertions(+) create mode 100644 src/ipa/meson.build create mode 100644 src/libcamera/include/ipa_manager.h create mode 100644 src/libcamera/ipa_manager.cpp (limited to 'src') diff --git a/src/ipa/meson.build b/src/ipa/meson.build new file mode 100644 index 00000000..be4f9547 --- /dev/null +++ b/src/ipa/meson.build @@ -0,0 +1,2 @@ +config_h.set('IPA_MODULE_DIR', + '"' + join_paths(get_option('prefix'), get_option('libdir'), 'libcamera') + '"') diff --git a/src/libcamera/include/ipa_manager.h b/src/libcamera/include/ipa_manager.h new file mode 100644 index 00000000..310ce7c8 --- /dev/null +++ b/src/libcamera/include/ipa_manager.h @@ -0,0 +1,40 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2019, Google Inc. + * + * ipa_manager.h - Image Processing Algorithm module manager + */ +#ifndef __LIBCAMERA_IPA_MANAGER_H__ +#define __LIBCAMERA_IPA_MANAGER_H__ + +#include + +#include +#include + +#include "ipa_module.h" +#include "pipeline_handler.h" + +namespace libcamera { + +class IPAManager +{ +public: + static IPAManager *instance(); + + std::unique_ptr createIPA(PipelineHandler *pipe, + uint32_t maxVersion, + uint32_t minVersion); + +private: + std::vector modules_; + + IPAManager(); + ~IPAManager(); + + int addDir(const char *libDir); +}; + +} /* namespace libcamera */ + +#endif /* __LIBCAMERA_IPA_MANAGER_H__ */ diff --git a/src/libcamera/ipa_manager.cpp b/src/libcamera/ipa_manager.cpp new file mode 100644 index 00000000..f689aa69 --- /dev/null +++ b/src/libcamera/ipa_manager.cpp @@ -0,0 +1,149 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2019, Google Inc. + * + * ipa_manager.cpp - Image Processing Algorithm module manager + */ + +#include "ipa_manager.h" + +#include +#include +#include + +#include "ipa_module.h" +#include "log.h" +#include "pipeline_handler.h" +#include "utils.h" + +/** + * \file ipa_manager.h + * \brief Image Processing Algorithm module manager + */ + +namespace libcamera { + +LOG_DEFINE_CATEGORY(IPAManager) + +/** + * \class IPAManager + * \brief Manager for IPA modules + */ + +IPAManager::IPAManager() +{ + addDir(IPA_MODULE_DIR); + + std::string modulePaths = utils::secure_getenv("LIBCAMERA_IPA_MODULE_PATH"); + if (modulePaths.empty()) + return; + + for (size_t pos = 0, delim = 0; delim != std::string::npos; + pos = delim + 1) { + delim = modulePaths.find(':', pos); + size_t count = delim == std::string::npos ? delim : delim - pos; + std::string path = modulePaths.substr(pos, count); + if (path.empty()) + continue; + + addDir(path.c_str()); + } +} + +IPAManager::~IPAManager() +{ + for (IPAModule *module : modules_) + delete module; +} + +/** + * \brief Retrieve the IPA manager instance + * + * The IPAManager is a singleton and can't be constructed manually. This + * function shall instead be used to retrieve the single global instance of the + * manager. + * + * \return The IPA manager instance + */ +IPAManager *IPAManager::instance() +{ + static IPAManager ipaManager; + return &ipaManager; +} + +/** + * \brief Load IPA modules from a directory + * \param[in] libDir directory to search for IPA modules + * + * This method tries to create an IPAModule instance for every shared object + * found in \a libDir, and skips invalid IPA modules. + * + * \return Number of modules loaded by this call, or a negative error code + * otherwise + */ +int IPAManager::addDir(const char *libDir) +{ + struct dirent *ent; + DIR *dir; + + dir = opendir(libDir); + if (!dir) { + int ret = -errno; + LOG(IPAManager, Error) + << "Invalid path " << libDir << " for IPA modules: " + << strerror(-ret); + return ret; + } + + unsigned int count = 0; + while ((ent = readdir(dir)) != nullptr) { + int offset = strlen(ent->d_name) - 3; + if (offset < 0) + continue; + if (strcmp(&ent->d_name[offset], ".so")) + continue; + + IPAModule *ipaModule = new IPAModule(std::string(libDir) + + "/" + ent->d_name); + if (!ipaModule->isValid()) { + delete ipaModule; + continue; + } + + modules_.push_back(ipaModule); + count++; + } + + closedir(dir); + return count; +} + +/** + * \brief Create an IPA interface that matches a given pipeline handler + * \param[in] pipe The pipeline handler that wants a matching IPA interface + * \param[in] minVersion Minimum acceptable version of IPA module + * \param[in] maxVersion Maximum acceptable version of IPA module + * + * \return A newly created IPA interface, or nullptr if no matching + * IPA module is found + */ +std::unique_ptr IPAManager::createIPA(PipelineHandler *pipe, + uint32_t maxVersion, + uint32_t minVersion) +{ + IPAModule *m = nullptr; + + for (IPAModule *module : modules_) { + if (module->match(pipe, minVersion, maxVersion)) { + m = module; + break; + } + } + + if (!m || !m->load()) + return nullptr; + + return m->createInstance(); +} + +} /* namespace libcamera */ diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build index 32f7da4d..0889b0d3 100644 --- a/src/libcamera/meson.build +++ b/src/libcamera/meson.build @@ -11,6 +11,7 @@ libcamera_sources = files([ 'formats.cpp', 'geometry.cpp', 'ipa_interface.cpp', + 'ipa_manager.cpp', 'ipa_module.cpp', 'log.cpp', 'media_device.cpp', @@ -33,6 +34,7 @@ libcamera_headers = files([ 'include/device_enumerator_udev.h', 'include/event_dispatcher_poll.h', 'include/formats.h', + 'include/ipa_manager.h', 'include/ipa_module.h', 'include/log.h', 'include/media_device.h', diff --git a/src/meson.build b/src/meson.build index 4e41fd3e..628e7a7f 100644 --- a/src/meson.build +++ b/src/meson.build @@ -1,3 +1,4 @@ subdir('libcamera') +subdir('ipa') subdir('cam') subdir('qcam') -- cgit v1.2.1