pinterf/dfttest 1.9.8

dfttest v1.9.8

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Changelog

2026.03.24 v1.9.8

• Cross-platform: builds on Linux (GCC/Clang) and Windows (MSVC/ClangCL/MinGW). CMakeLists.txt added. Intel SIMD auto-detected; disabled automatically on ARM/RISC-V.
• Threading: replaced Windows API (HANDLE, events, _beginthreadex, CRITICAL_SECTION) with C++17 std::thread, std::mutex, std::condition_variable.
• Thread safety: use Avisynth+ V12 global lock (AcquireGlobalLock/ReleaseGlobalLock) around FFTW plan creation and destruction. Falls back to std::mutex on older Avisynth+ versions.
• CPU detection: removed internal CPUCheckForExtensions(), use env->GetCPUFlags() instead.
• Dynamic library loading (FFTW3): platform-agnostic via LoadLibrary/dlopen abstraction.
• Updated Avisynth headers to V12 interface.