opencv/android/service/engine/jni/BinderComponent/OpenCVEngine.cpp

#include "EngineCommon.h"
#include "OpenCVEngine.h"
#include "HardwareDetector.h"
#include "StringUtils.h"
#include <utils/Log.h>
#include <assert.h>
#include <string>

#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <dlfcn.h>

using namespace android;

const int OpenCVEngine::Platform = DetectKnownPlatforms();
const int OpenCVEngine::CpuID = GetCpuID();

std::set<std::string> OpenCVEngine::InitKnownOpenCVersions()
{
    std::set<std::string> result;

    result.insert("240");
    result.insert("241");
    result.insert("242");

    return result;
}

const std::set<std::string> OpenCVEngine::KnownVersions = InitKnownOpenCVersions();

bool OpenCVEngine::ValidateVersionString(const std::string& version)
{
    return (KnownVersions.find(version) != KnownVersions.end());
}

std::string OpenCVEngine::NormalizeVersionString(std::string version)
{
    std::string result = "";
    std::string suffix = "";

    if (version.empty())
    {
    return result;
    }

    if (('a' == version[version.size()-1]) || ('b' == version[version.size()-1]))
    {
    suffix = version[version.size()-1];
    version.erase(version.size()-1);
    }

    std::vector<std::string> parts = SplitStringVector(version, '.');

    if (parts.size() >= 2)
    {
    if (parts.size() >= 3)
    {
        result = parts[0] + parts[1] + parts[2] + suffix;
        if (!ValidateVersionString(result))
        result = "";
    }
    else
    {
        result = parts[0] + parts[1] + "0" + suffix;
        if (!ValidateVersionString(result))
        result = "";
    }
    }

    return result;
}

OpenCVEngine::OpenCVEngine(IPackageManager* PkgManager):
    PackageManager(PkgManager)
{
    assert(PkgManager);
}

int32_t OpenCVEngine::GetVersion()
{
    return OPEN_CV_ENGINE_VERSION;
}

String16 OpenCVEngine::GetLibPathByVersion(android::String16 version)
{
    std::string std_version(String8(version).string());
    std::string norm_version;
    std::string path;

    LOGD("OpenCVEngine::GetLibPathByVersion(%s) impl", String8(version).string());

    norm_version = NormalizeVersionString(std_version);

    if (!norm_version.empty())
    {
    path = PackageManager->GetPackagePathByVersion(norm_version, Platform, CpuID);
    if (path.empty())
    {
        LOGI("Package OpenCV of version %s is not installed. Try to install it :)", norm_version.c_str());
    }
    else
    {
        FixPermissions(path);
    }
    }
    else
    {
    LOGE("OpenCV version \"%s\" (%s) is not supported", String8(version).string(), norm_version.c_str());
    }

    return String16(path.c_str());
}

android::String16 OpenCVEngine::GetLibraryList(android::String16 version)
{
    std::string std_version = String8(version).string();
    std::string norm_version;
    String16 result;
    norm_version = NormalizeVersionString(std_version);

    if (!norm_version.empty())
    {
    std::string tmp = PackageManager->GetPackagePathByVersion(norm_version, Platform, CpuID);
    if (!tmp.empty())
    {
        tmp += (std::string("/") + LIB_OPENCV_INFO_NAME);

        LOGD("Trying to load info library \"%s\"", tmp.c_str());

        void* handle;
        char* (*info_func)();

        handle = dlopen(tmp.c_str(), RTLD_LAZY);
        if (handle)
        {
        const char* error;

        dlerror();
        *(void **) (&info_func) = dlsym(handle, "GetLibraryList");
        if ((error = dlerror()) == NULL)
        {
            result = String16((*info_func)());
            dlclose(handle);
        }
        else
        {
            LOGE("Library loading error: \"%s\"", error);
        }
        }
        else
        {
        LOGI("Info library not found in package");
        }
    }
    else
    {
        LOGI("Package OpenCV of version %s is not installed. Try to install it :)", norm_version.c_str());
    }
    }
    else
    {
    LOGE("OpenCV version \"%s\" is not supported", norm_version.c_str());
    }

    return result;
}

bool OpenCVEngine::InstallVersion(android::String16 version)
{
    std::string std_version = String8(version).string();
    std::string norm_version;
    bool result = false;

    norm_version = NormalizeVersionString(std_version);

    if (!norm_version.empty())
    {
    LOGD("OpenCVEngine::InstallVersion() begin");

    if (!PackageManager->CheckVersionInstalled(norm_version, Platform, CpuID))
    {
        LOGD("PackageManager->InstallVersion call");
        result = PackageManager->InstallVersion(norm_version, Platform, CpuID);
    }
    else
    {
        LOGI("Package OpenCV of version %s is already installed. Skiped.", norm_version.c_str());
        result = true;
    }
    }
    else
    {
    LOGE("OpenCV version \"%s\" is not supported", norm_version.c_str());
    }

    LOGD("OpenCVEngine::InstallVersion() end");

    return result;
}

bool OpenCVEngine::FixPermissions(const std::string& path)
{
    LOGD("Fixing permissions for folder: \"%s\"", path.c_str());
    chmod(path.c_str(), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);

    DIR* dir = opendir(path.c_str());
    if (!dir)
    {
    LOGD("Fixing permissions error");
    return false;
    }

    dirent* files = readdir(dir);
    while (files)
    {
    LOGD("Fix permissions for \"%s\"", files->d_name);
    chmod((path + std::string("/") + std::string(files->d_name)).c_str(), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
    files = readdir(dir);
    }

    closedir(dir);

    return true;
}