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86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
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// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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//
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// Not a standalone header, part of va_intel.cpp
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//
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#include "opencv2/core/utils/plugin_loader.private.hpp" // DynamicLib
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namespace cv { namespace detail {
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typedef VAStatus (*FN_vaDeriveImage)(VADisplay dpy, VASurfaceID surface, VAImage *image);
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typedef VAStatus (*FN_vaDestroyImage)(VADisplay dpy, VAImageID image);
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typedef VAStatus (*FN_vaMapBuffer)(VADisplay dpy, VABufferID buf_id, void **pbuf);
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typedef VAStatus (*FN_vaSyncSurface)(VADisplay dpy, VASurfaceID render_target);
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typedef VAStatus (*FN_vaUnmapBuffer)(VADisplay dpy, VABufferID buf_id);
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static FN_vaDeriveImage fn_vaDeriveImage = NULL;
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static FN_vaDestroyImage fn_vaDestroyImage = NULL;
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static FN_vaMapBuffer fn_vaMapBuffer = NULL;
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static FN_vaSyncSurface fn_vaSyncSurface = NULL;
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static FN_vaUnmapBuffer fn_vaUnmapBuffer = NULL;
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#define vaDeriveImage fn_vaDeriveImage
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#define vaDestroyImage fn_vaDestroyImage
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#define vaMapBuffer fn_vaMapBuffer
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#define vaSyncSurface fn_vaSyncSurface
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#define vaUnmapBuffer fn_vaUnmapBuffer
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static std::shared_ptr<cv::plugin::impl::DynamicLib> loadLibVA()
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{
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std::shared_ptr<cv::plugin::impl::DynamicLib> lib;
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const char* envPath = getenv("OPENCV_LIBVA_RUNTIME");
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if (envPath)
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{
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lib = std::make_shared<cv::plugin::impl::DynamicLib>(envPath);
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return lib;
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}
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static const char* const candidates[] = {
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"libva.so",
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"libva.so.2",
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"libva.so.1",
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};
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for (int i = 0; i < 3; ++i)
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{
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lib = std::make_shared<cv::plugin::impl::DynamicLib>(candidates[i]);
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if (lib->isLoaded())
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break;
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}
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return lib;
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}
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static void init_libva()
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{
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static bool initialized = false;
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static auto library = loadLibVA();
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if (!initialized)
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{
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if (!library || !library->isLoaded())
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{
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library.reset();
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CV_Error(cv::Error::StsBadFunc, "OpenCV can't load VA library (libva)");
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}
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auto& lib = *library.get();
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#define VA_LOAD_SYMBOL(name) fn_ ## name = reinterpret_cast<FN_ ## name>(lib.getSymbol(#name)); \
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if (!fn_ ## name) \
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{ \
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library.reset(); \
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initialized = true; \
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CV_Error_(cv::Error::StsBadFunc, ("OpenCV can't load VA library (libva), missing symbol: %s", #name)); \
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}
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VA_LOAD_SYMBOL(vaDeriveImage);
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VA_LOAD_SYMBOL(vaDestroyImage);
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VA_LOAD_SYMBOL(vaMapBuffer);
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VA_LOAD_SYMBOL(vaSyncSurface);
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VA_LOAD_SYMBOL(vaUnmapBuffer);
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initialized = true;
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}
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if (!library)
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CV_Error(cv::Error::StsBadFunc, "OpenCV can't load/initialize VA library (libva)");
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}
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}} // namespace
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