libcamera/libcamera.git - libcamera official repository

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Diffstat (limited to 'src/ipa/raspberrypi/controller/histogram.hpp')

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/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2019, Google Inc. * * ipa_proxy.cpp - Image Processing Algorithm proxy */ #include "libcamera/internal/ipa_proxy.h" #include <string.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #include <libcamera/base/log.h> #include <libcamera/base/utils.h> #include "libcamera/internal/ipa_module.h" /** * \file ipa_proxy.h * \brief IPA Proxy */ namespace libcamera { LOG_DEFINE_CATEGORY(IPAProxy) /** * \class IPAProxy * \brief IPA Proxy * * Isolate IPA into separate process. */ /** * \enum IPAProxy::ProxyState * \brief Identifies the available operational states of the proxy * * \var IPAProxy::ProxyStopped * \brief The proxy is not active and only synchronous operations are permitted * \var IPAProxy::ProxyStopping * \brief No new tasks can be submitted to the proxy, however existing events * can be completed * \var IPAProxy::ProxyRunning * \brief The Proxy is active and asynchronous tasks may be queued */ /** * \brief Construct an IPAProxy instance * \param[in] ipam The IPA module */ IPAProxy::IPAProxy(IPAModule *ipam) : valid_(false), state_(ProxyStopped), ipam_(ipam) { } IPAProxy::~IPAProxy() { } /** * \fn IPAProxy::isValid() * \brief Check if the IPAProxy instance is valid * * An IPAProxy instance is valid if the IPA interface is successfully created in * isolation, and IPC is successfully set up. * * \return True if the IPAProxy is valid, false otherwise */ /** * \brief Retrieve the absolute path to an IPA configuration file * \param[in] name The configuration file name * * This function locates the configuration file for an IPA and returns its * absolute path. It searches the following directories, in order: * * - All directories specified in the colon-separated LIBCAMERA_IPA_CONFIG_PATH * environment variable ; or * - If libcamera is not installed, the src/ipa/ directory within the source * tree ; otherwise * - The system sysconf (etc/libcamera/ipa) and the data (share/libcamera/ipa/) * directories. * * The system directories are not searched if libcamera is not installed. * * Within each of those directories, the function looks for a subdirectory * named after the IPA module name, as reported in IPAModuleInfo::name, and for * a file named \a name within that directory. The \a name is IPA-specific. * * \return The full path to the IPA configuration file, or an empty string if * no configuration file can be found */ std::string IPAProxy::configurationFile(const std::string &name) const { struct stat statbuf; int ret; /* * The IPA module name can be used as-is to build directory names as it * has been validated when loading the module. */ std::string ipaName = ipam_->info().name; /* Check the environment variable first. */ const char *confPaths = utils::secure_getenv("LIBCAMERA_IPA_CONFIG_PATH"); if (confPaths) { for (const auto &dir : utils::split(confPaths, ":")) { if (dir.empty()) continue; std::string confPath = dir + "/" + ipaName + "/" + name; ret = stat(confPath.c_str(), &statbuf); if (ret == 0 && (statbuf.st_mode & S_IFMT) == S_IFREG) return confPath; } } std::string root = utils::libcameraSourcePath(); if (!root.empty()) { /* * When libcamera is used before it is installed, load * configuration files from the source directory. The * configuration files are then located in the 'data' * subdirectory of the corresponding IPA module. */ std::string ipaConfDir = root + "src/ipa/" + ipaName + "/data"; LOG(IPAProxy, Info) << "libcamera is not installed. Loading IPA configuration from '" << ipaConfDir << "'"; std::string confPath = ipaConfDir + "/" + name; ret = stat(confPath.c_str(), &statbuf); if (ret == 0 && (statbuf.st_mode & S_IFMT) == S_IFREG) return confPath; } else { /* Else look in the system locations. */ for (const auto &dir : utils::split(IPA_CONFIG_DIR, ":")) { std::string confPath = dir + "/" + ipaName + "/" + name; ret = stat(confPath.c_str(), &statbuf); if (ret == 0 && (statbuf.st_mode & S_IFMT) == S_IFREG) return confPath; } } LOG(IPAProxy, Error) << "Configuration file '" << name << "' not found for IPA module '" << ipaName << "'"; return std::string(); } /** * \brief Find a valid full path for a proxy worker for a given executable name * \param[in] file File name of proxy worker executable * * A proxy worker's executable could be found in either the global installation * directory, or in the paths specified by the environment variable * LIBCAMERA_IPA_PROXY_PATH. This function checks the global install directory * first, then LIBCAMERA_IPA_PROXY_PATH in order, and returns the full path to * the proxy worker executable that is specified by file. The proxy worker * executable shall have exec permission. * * \return The full path to the proxy worker executable, or an empty string if * no valid executable path */ std::string IPAProxy::resolvePath(const std::string &file) const { std::string proxyFile = "/" + file; /* Check env variable first. */ const char *execPaths = utils::secure_getenv("LIBCAMERA_IPA_PROXY_PATH"); if (execPaths) { for (const auto &dir : utils::split(execPaths, ":")) { if (dir.empty()) continue; std::string proxyPath = dir; proxyPath += proxyFile; if (!access(proxyPath.c_str(), X_OK)) return proxyPath; } } /* * When libcamera is used before it is installed, load proxy workers * from the same build directory as the libcamera directory itself. * This requires identifying the path of the libcamera.so, and * referencing a relative path for the proxy workers from that point. */ std::string root = utils::libcameraBuildPath(); if (!root.empty()) { std::string ipaProxyDir = root + "src/libcamera/proxy/worker"; LOG(IPAProxy, Info) << "libcamera is not installed. Loading proxy workers from '" << ipaProxyDir << "'"; std::string proxyPath = ipaProxyDir + proxyFile; if (!access(proxyPath.c_str(), X_OK)) return proxyPath; return std::string(); } /* Else try finding the exec target from the install directory. */ std::string proxyPath = std::string(IPA_PROXY_DIR) + proxyFile; if (!access(proxyPath.c_str(), X_OK)) return proxyPath; return std::string(); } /** * \var IPAProxy::valid_ * \brief Flag to indicate if the IPAProxy instance is valid * * A IPAProxy instance is valid if the IPA interface is successfully created in * isolation, and IPC is successfully set up. * * This flag can be read via IPAProxy::isValid(). * * Implementations of the IPAProxy class should set this flag upon successful * construction. */ /** * \var IPAProxy::state_ * \brief Current state of the IPAProxy * * The IPAProxy can be Running, Stopped, or Stopping. * * This state provides a means to ensure that asynchronous functions are only * called while the proxy is running, and prevent new tasks being submitted * while still enabling events to complete when the IPAProxy is stopping. */ } /* namespace libcamera */


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