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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
//
// Copyright (C) 2021 Intel Corporation
#include "gstreamerenv.hpp"
#include "gstreamerptr.hpp"
#ifdef HAVE_GSTREAMER
#include <gst/gst.h>
#endif // HAVE_GSTREAMER
namespace cv {
namespace gapi {
namespace wip {
namespace gst {
#ifdef HAVE_GSTREAMER
const GStreamerEnv& GStreamerEnv::init()
{
static GStreamerEnv gInit;
return gInit;
}
GStreamerEnv::GStreamerEnv()
{
if (!gst_is_initialized())
{
GError* error = NULL;
gst_init_check(NULL, NULL, &error);
GStreamerPtr<GError> err(error);
if (err)
{
cv::util::throw_error(
std::runtime_error(std::string("GStreamer initializaton error! Details: ") +
err->message));
}
}
// FIXME: GStreamer libs which have same MAJOR and MINOR versions are API and ABI compatible.
// If GStreamer runtime MAJOR version differs from the version the application was
// compiled with, will it fail on the linkage stage? If so, the code below isn't needed.
guint major, minor, micro, nano;
gst_version(&major, &minor, µ, &nano);
if (GST_VERSION_MAJOR != major)
{
cv::util::throw_error(
std::runtime_error(std::string("Incompatible GStreamer version: compiled with ") +
std::to_string(GST_VERSION_MAJOR) + '.' +
std::to_string(GST_VERSION_MINOR) + '.' +
std::to_string(GST_VERSION_MICRO) + '.' +
std::to_string(GST_VERSION_NANO) +
", but runtime has " +
std::to_string(major) + '.' + std::to_string(minor) + '.' +
std::to_string(micro) + '.' + std::to_string(nano) + '.'));
}
}
GStreamerEnv::~GStreamerEnv()
{
gst_deinit();
}
#else // HAVE_GSTREAMER
const GStreamerEnv& GStreamerEnv::init()
{
GAPI_Error("Built without GStreamer support!");
}
GStreamerEnv::GStreamerEnv()
{
GAPI_Error("Built without GStreamer support!");
}
GStreamerEnv::~GStreamerEnv()
{
// No need an assert here. The assert raise C4722 warning. Constructor have already got assert.
}
#endif // HAVE_GSTREAMER
} // namespace gst
} // namespace wip
} // namespace gapi
} // namespace cv
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