Remove MSVC project files and use Meson as universal build system

meson.build

@@ -1,30 +1,43 @@
 project('VMAF', 'cpp',
-  default_options : ['buildtype=release', 'b_ndebug=if-release', 'cpp_std=c++17'],
-  meson_version : '>=0.48.0',
-  version : '6'
+  default_options: ['buildtype=release', 'warning_level=2', 'b_lto=true', 'b_ndebug=if-release', 'cpp_std=c++17'],
+  license: 'MIT',
+  meson_version: '>=0.51.0',
+  version: '6'
 )
 
-add_project_arguments('-ffast-math', language : 'cpp')
+cxx = meson.get_compiler('cpp')
+
+gcc_syntax = cxx.get_argument_syntax() == 'gcc'
+
+if get_option('buildtype') == 'release'
+  add_project_arguments(gcc_syntax ? ['-fno-math-errno', '-fno-trapping-math'] : ['/GS-', '/fp:except-'], language: 'cpp')
+endif
+
+if gcc_syntax
+  vapoursynth_dep = dependency('vapoursynth').partial_dependency(compile_args: true, includes: true)
+  libvmaf_dep = dependency('libvmaf', version: '>=2.0.0')
+  deps = [vapoursynth_dep, libvmaf_dep]
+  install_dir = vapoursynth_dep.get_variable(pkgconfig: 'libdir') / 'vapoursynth'
+else
+  libvmaf_dep = cxx.find_library('libvmaf')
+  thread_dep = cxx.find_library('pthreads')
+  deps = [libvmaf_dep, thread_dep]
+  install_dir = get_option('libdir') / 'vapoursynth'
+endif
 
 sources = [
   'VMAF/VMAF.cpp'
 ]
 
-vapoursynth_dep = dependency('vapoursynth').partial_dependency(compile_args : true, includes : true)
-
-libvmaf_dep = dependency('libvmaf')
-
-if host_machine.cpu_family().startswith('x86')
-  add_project_arguments('-mfpmath=sse', '-msse2', language : 'cpp')
+if host_machine.cpu_family().startswith('x86') and gcc_syntax
+  add_project_arguments('-mfpmath=sse', '-msse2', language: 'cpp')
 endif
 
-vapoursynth_plugindir = join_paths(vapoursynth_dep.get_pkgconfig_variable('libdir'), 'vapoursynth')
-
 shared_module('vmaf', sources,
-  dependencies : [vapoursynth_dep, libvmaf_dep],
-  install : true,
-  install_dir : vapoursynth_plugindir,
-  gnu_symbol_visibility : 'hidden'
+  dependencies: deps,
+  install: true,
+  install_dir: install_dir,
+  gnu_symbol_visibility: 'hidden'
 )
 
 install_subdir('VMAF/model',