Open Source Computer Vision Library https://opencv.org/
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#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\" is not supported", 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 += "/libopencvinfo.so";
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;
}