ipa_manager.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * Image Processing Algorithm module manager
 */
 
#pragma once
 
#include <memory>
#include <stdint.h>
#include <vector>
 
#include <libcamera/base/log.h>
 
#include <libcamera/ipa/ipa_interface.h>
#include <libcamera/ipa/ipa_module_info.h>
 
#include "libcamera/internal/pub_key.h"
 
namespace libcamera {
 
LOG_DECLARE_CATEGORY(IPAManager)
 
class CameraManager;
class GlobalConfiguration;
class IPAModule;
 
class IPAManager
{
public:
    IPAManager(const CameraManager &cm);
    ~IPAManager();
 
    template<typename T>
    std::unique_ptr<T> createIPA(const char *name, uint32_t minVersion,
                     uint32_t maxVersion)
    {
        IPAModule *m = module(name, minVersion, maxVersion);
        if (!m)
            return nullptr;
 
        auto proxy = [&]() -> std::unique_ptr<T> {
            if (isSignatureValid(m))
                return std::make_unique<typename T::Threaded>(m, cm_);
            else
                return std::make_unique<typename T::Isolated>(m, cm_);
        }();
 
        if (!proxy->isValid()) {
            LOG(IPAManager, Error) << "Failed to load proxy";
            return nullptr;
        }
 
        return proxy;
    }
 
#if HAVE_IPA_PUBKEY
    static const PubKey &pubKey()
    {
        return pubKey_;
    }
#endif
 
private:
    void parseDir(const char *libDir, unsigned int maxDepth,
              std::vector<std::string> &files);
    unsigned int addDir(const char *libDir, unsigned int maxDepth = 0);
 
    IPAModule *module(const char *name, uint32_t minVersion,
              uint32_t maxVersion);
 
    bool isSignatureValid(IPAModule *ipa) const;
 
    const CameraManager &cm_;
    std::vector<std::unique_ptr<IPAModule>> modules_;
 
#if HAVE_IPA_PUBKEY
    static const uint8_t publicKeyData_[];
    static const PubKey pubKey_;
    bool forceIsolation_;
#endif
};
 
} /* namespace libcamera */