63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
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#pragma once
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// ============================================================================
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// CvLoader -- Runtime discovery and pre-loading of OpenCV DLLs
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//
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// OpenCV is normally import-linked (opencv_world4130.lib), but the DLLs
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// must be discoverable at process load time. CvLoader ensures the correct
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// DLL is found by:
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// 1. Searching the ANSCENTER shared directory for versioned candidates
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// 2. Injecting the directory into the DLL search path
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// 3. Pre-loading the DLL so dependent modules resolve it correctly
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//
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// Companion modules (opencv_img_hash, opencv_videoio_ffmpeg) are also
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// pre-loaded when found alongside the main opencv_world DLL.
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// ============================================================================
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#include "ANSLibsLoader.h" // ANSLIBS_API
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#include "DynLibUtils.h" // LibHandle
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#include <string>
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#include <vector>
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#include <mutex>
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// ============================================================================
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struct ANSLIBS_API CvInfo
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{
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std::string dllPath; // Full path to loaded opencv_world DLL
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std::string version; // e.g. "4.13.0"
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int versionCode = 0;// e.g. 4130
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bool loaded = false;
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};
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// ============================================================================
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class ANSLIBS_API CvLoader
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{
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public:
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/// Discover and pre-load OpenCV DLLs.
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/// Safe to call multiple times -- subsequent calls are no-ops.
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/// @param shared_dir Directory to search first (default: ANSCENTER shared).
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/// @param verbose Print discovery results to stdout.
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/// @returns Reference to the discovery result.
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[[nodiscard]] static const CvInfo& Initialize(
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const std::string& shared_dir = ANSCENTER::DynLib::DEFAULT_SHARED_DIR,
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bool verbose = true);
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/// Release pre-loaded library handles.
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static void Shutdown();
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/// Query current state.
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[[nodiscard]] static const CvInfo& Current() noexcept { return s_info; }
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[[nodiscard]] static bool IsInitialized() noexcept { return s_initialized; }
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private:
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/// Build candidate DLL names, newest first.
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static std::vector<std::string> CvWorldCandidates(const std::string& shared_dir);
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static std::vector<std::string> CvImgHashCandidates(const std::string& shared_dir);
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static std::mutex s_mutex;
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static bool s_initialized;
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static CvInfo s_info;
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static LibHandle s_hCvWorld;
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static LibHandle s_hCvImgHash;
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};
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