icvInitFFMPEG()
{
#if defined WIN32 || defined _WIN32
const char* module_name = "opencv_ffmpeg"
CVAUX_STR(CV_MAJOR_VERSION) CVAUX_STR(CV_MINOR_VERSION) CVAUX_STR(CV_SUBMINOR_VERSION)
#if (defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__)
"_64"
#endif
".dll";
icvFFOpenCV = LoadLibrary( module_name );
if( icvFFOpenCV )
{
icvCreateFileCapture_FFMPEG_p =
(CvCreateFileCapture_Plugin)GetProcAddress(icvFFOpenCV, "cvCreateFileCapture_FFMPEG");
icvReleaseCapture_FFMPEG_p =
(CvReleaseCapture_Plugin)GetProcAddress(icvFFOpenCV, "cvReleaseCapture_FFMPEG");
icvGrabFrame_FFMPEG_p =
(CvGrabFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvGrabFrame_FFMPEG");
icvRetrieveFrame_FFMPEG_p =
(CvRetrieveFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvRetrieveFrame_FFMPEG");
icvSetCaptureProperty_FFMPEG_p =
(CvSetCaptureProperty_Plugin)GetProcAddress(icvFFOpenCV, "cvSetCaptureProperty_FFMPEG");
icvGetCaptureProperty_FFMPEG_p =
(CvGetCaptureProperty_Plugin)GetProcAddress(icvFFOpenCV, "cvGetCaptureProperty_FFMPEG");
icvCreateVideoWriter_FFMPEG_p =
(CvCreateVideoWriter_Plugin)GetProcAddress(icvFFOpenCV, "cvCreateVideoWriter_FFMPEG");
icvReleaseVideoWriter_FFMPEG_p =
(CvReleaseVideoWriter_Plugin)GetProcAddress(icvFFOpenCV, "cvReleaseVideoWriter_FFMPEG");
icvWriteFrame_FFMPEG_p =
(CvWriteFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvWriteFrame_FFMPEG");
if( icvCreateFileCapture_FFMPEG_p == NULL ||
icvReleaseCapture_FFMPEG_p == NULL ||
icvGrabFrame_FFMPEG_p == NULL ||
icvRetrieveFrame_FFMPEG_p == NULL ||
icvSetCaptureProperty_FFMPEG_p == NULL ||
icvGetCaptureProperty_FFMPEG_p == NULL ||
icvCreateVideoWriter_FFMPEG_p == NULL ||
icvReleaseVideoWriter_FFMPEG_p == NULL ||
icvWriteFrame_FFMPEG_p == NULL )
{
fprintf(stderr, "Failed to load FFMPEG plugin: module handle=%p\n", icvFFOpenCV);
}
}
#elif defined HAVE_FFMPEG
icvCreateFileCapture_FFMPEG_p = (CvCreateFileCapture_Plugin)cvCreateFileCapture_FFMPEG;
icvReleaseCapture_FFMPEG_p = (CvReleaseCapture_Plugin)cvReleaseCapture_FFMPEG;
icvGrabFrame_FFMPEG_p = (CvGrabFrame_Plugin)cvGrabFrame_FFMPEG;
icvRetrieveFrame_FFMPEG_p = (CvRetrieveFrame_Plugin)cvRetrieveFrame_FFMPEG;
icvSetCaptureProperty_FFMPEG_p = (CvSetCaptureProperty_Plugin)cvSetCaptureProperty_FFMPEG;
icvGetCaptureProperty_FFMPEG_p = (CvGetCaptureProperty_Plugin)cvGetCaptureProperty_FFMPEG;
icvCreateVideoWriter_FFMPEG_p = (CvCreateVideoWriter_Plugin)cvCreateVideoWriter_FFMPEG;
icvReleaseVideoWriter_FFMPEG_p = (CvReleaseVideoWriter_Plugin)cvReleaseVideoWriter_FFMPEG;
icvWriteFrame_FFMPEG_p = (CvWriteFrame_Plugin)cvWriteFrame_FFMPEG;
#endif
}
cv::String getCacheDirectory(const char* sub_directory_name, const char* configuration_name)
{
String cache_path;
if (configuration_name)
{
cache_path = utils::getConfigurationParameterString(configuration_name, "");
}
if (cache_path.empty())
{
cv::String default_cache_path;
#ifdef _WIN32
char tmp_path_buf[MAX_PATH+1] = {0};
DWORD res = GetTempPath(MAX_PATH, tmp_path_buf);
if (res > 0 && res <= MAX_PATH)
{
default_cache_path = tmp_path_buf;
}
#elif defined __ANDROID__
// no defaults
#elif defined __APPLE__
const char* tmpdir_env = getenv("TMPDIR");
if (tmpdir_env && utils::fs::isDirectory(tmpdir_env))
{
default_cache_path = tmpdir_env;
}
else
{
default_cache_path = "/tmp/";
CV_LOG_WARNING(NULL, "Using world accessible cache directory. This may be not secure: " << default_cache_path);
}
#elif defined __linux__ || defined __HAIKU__ || defined __FreeBSD__
// https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
if (default_cache_path.empty())
{
const char* xdg_cache_env = getenv("XDG_CACHE_HOME");
if (xdg_cache_env && xdg_cache_env[0] && utils::fs::isDirectory(xdg_cache_env))
{
default_cache_path = xdg_cache_env;
}
}
if (default_cache_path.empty())
{
const char* home_env = getenv("HOME");
if (home_env && home_env[0] && utils::fs::isDirectory(home_env))
{
cv::String home_path = home_env;
cv::String home_cache_path = utils::fs::join(home_path, ".cache/");
if (utils::fs::isDirectory(home_cache_path))
{
default_cache_path = home_cache_path;
}
}
}
if (default_cache_path.empty())
{
const char* temp_path = "/var/tmp/";
if (utils::fs::isDirectory(temp_path))
{
default_cache_path = temp_path;
CV_LOG_WARNING(NULL, "Using world accessible cache directory. This may be not secure: " << default_cache_path);
}
}
if (default_cache_path.empty())
{
default_cache_path = "/tmp/";
CV_LOG_WARNING(NULL, "Using world accessible cache directory. This may be not secure: " << default_cache_path);
}
#else
// no defaults
#endif
CV_LOG_VERBOSE(NULL, 0, "default_cache_path = " << default_cache_path);
if (!default_cache_path.empty())
{
if (utils::fs::isDirectory(default_cache_path))
{
cv::String default_cache_path_base = utils::fs::join(default_cache_path, "opencv");
default_cache_path = utils::fs::join(default_cache_path_base, CVAUX_STR(CV_VERSION_MAJOR) "." CVAUX_STR(CV_VERSION_MINOR) CV_VERSION_STATUS);
if (utils::getConfigurationParameterBool("OPENCV_CACHE_SHOW_CLEANUP_MESSAGE", true)
&& !utils::fs::isDirectory(default_cache_path))
{
std::vector<cv::String> existedCacheDirs;
try
{
utils::fs::glob_relative(default_cache_path_base, "*", existedCacheDirs, false, true);
}
catch (...)
{
// ignore
}
if (!existedCacheDirs.empty())
{
CV_LOG_WARNING(NULL, "Creating new OpenCV cache directory: " << default_cache_path);
CV_LOG_WARNING(NULL, "There are several neighbour directories, probably created by old OpenCV versions.");
CV_LOG_WARNING(NULL, "Feel free to cleanup these unused directories:");
for (size_t i = 0; i < existedCacheDirs.size(); i++)
{
CV_LOG_WARNING(NULL, " - " << existedCacheDirs[i]);
}
CV_LOG_WARNING(NULL, "Note: This message is showed only once.");
}
}
if (sub_directory_name && sub_directory_name[0] != '\0')
default_cache_path = utils::fs::join(default_cache_path, cv::String(sub_directory_name) + native_separator);
if (!utils::fs::createDirectories(default_cache_path))
{
CV_LOG_DEBUG(NULL, "Can't create OpenCV cache sub-directory: " << default_cache_path);
}
else
{
cache_path = default_cache_path;
}
}
else
{
CV_LOG_INFO(NULL, "Can't find default cache directory (does it exist?): " << default_cache_path);
}
}
else
{
CV_LOG_DEBUG(NULL, "OpenCV has no support to discover default cache directory on the current platform");
}
}
else
{
if (cache_path == "disabled")
return cache_path;
if (!isDirectory(cache_path))
{
CV_LOG_WARNING(NULL, "Specified non-existed directory, creating OpenCV sub-directory for caching purposes: " << cache_path);
if (!createDirectories(cache_path))
{
CV_LOG_ERROR(NULL, "Can't create OpenCV cache sub-directory: " << cache_path);
cache_path.clear();
}
}
}
CV_Assert(cache_path.empty() || utils::fs::isDirectory(cache_path));
if (!cache_path.empty())
{
if (!isPathSeparator(cache_path[cache_path.size() - 1]))
{
cache_path += native_separator;
}
}
return cache_path;
}
