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/* 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 <algorithm>
#include <dirent.h>
#include <string.h>
#include <sys/types.h>
#include "ipa_module.h"
#include "ipa_proxy.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()
{
unsigned int ipaCount = 0;
int ret;
ret = addDir(IPA_MODULE_DIR);
if (ret > 0)
ipaCount += ret;
const char *modulePaths = utils::secure_getenv("LIBCAMERA_IPA_MODULE_PATH");
if (!modulePaths) {
if (!ipaCount)
LOG(IPAManager, Warning)
<< "No IPA found in '" IPA_MODULE_DIR "'";
return;
}
const char *paths = modulePaths;
while (1) {
const char *delim = strchrnul(paths, ':');
size_t count = delim - paths;
if (count) {
std::string path(paths, count);
ret = addDir(path.c_str());
if (ret > 0)
ipaCount += ret;
}
if (*delim == '\0')
break;
paths += count + 1;
}
if (!ipaCount)
LOG(IPAManager, Warning)
<< "No IPA found in '" IPA_MODULE_DIR "' and '"
<< modulePaths << "'";
}
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)
return -errno;
std::vector<std::string> paths;
while ((ent = readdir(dir)) != nullptr) {
int offset = strlen(ent->d_name) - 3;
if (offset < 0)
continue;
if (strcmp(&ent->d_name[offset], ".so"))
continue;
paths.push_back(std::string(libDir) + "/" + ent->d_name);
}
closedir(dir);
/* Ensure a stable ordering of modules. */
std::sort(paths.begin(), paths.end());
unsigned int count = 0;
for (const std::string &path : paths) {
IPAModule *ipaModule = new IPAModule(path);
if (!ipaModule->isValid()) {
delete ipaModule;
continue;
}
LOG(IPAManager, Debug) << "Loaded IPA module '" << path << "'";
modules_.push_back(ipaModule);
count++;
}
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 or if the IPA interface fails to initialize
*/
std::unique_ptr<IPAInterface> 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)
return nullptr;
if (!m->isOpenSource()) {
IPAProxyFactory *pf = nullptr;
std::vector<IPAProxyFactory *> &factories = IPAProxyFactory::factories();
for (IPAProxyFactory *factory : factories) {
/* TODO: Better matching */
if (!strcmp(factory->name().c_str(), "IPAProxyLinux")) {
pf = factory;
break;
}
}
if (!pf) {
LOG(IPAManager, Error) << "Failed to get proxy factory";
return nullptr;
}
std::unique_ptr<IPAProxy> proxy = pf->create(m);
if (!proxy->isValid()) {
LOG(IPAManager, Error) << "Failed to load proxy";
return nullptr;
}
return proxy;
}
if (!m->load())
return nullptr;
return m->createInstance();
}
} /* namespace libcamera */
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