Replace custom configure script with Meson build system

Author: HolyWu

GNUmakefile

@@ -434,3 +434,10 @@ ref = haf.SMDegrain(src)
 flt = core.bm3d.VFinal(src, ref, radius=1, matrix=100).bm3d.VAggregate(radius=1)
 flt = core.bm3d.OPP2RGB(flt)
 ```
+
+## Compilation
+
+```
+meson build
+ninja -C build
+```

README.md

@@ -0,0 +1,51 @@
+project('BM3D', 'cpp',
+  default_options : ['buildtype=release', 'b_ndebug=if-release', 'cpp_std=c++14'],
+  meson_version : '>=0.48.0',
+  version : '8'
+)
+
+add_project_arguments('-Wno-unused-local-typedefs', language : 'cpp')
+
+sources = [
+  'include/Block.h',
+  'include/BM3D.h',
+  'include/BM3D_Base.h',
+  'include/BM3D_Basic.h',
+  'include/BM3D_Final.h',
+  'include/Conversion.hpp',
+  'include/fftw3_helper.hpp',
+  'include/Helper.h',
+  'include/OPP2RGB.h',
+  'include/RGB2OPP.h',
+  'include/Specification.h',
+  'include/Type.h',
+  'include/VAggregate.h',
+  'include/VBM3D_Base.h',
+  'include/VBM3D_Basic.h',
+  'include/VBM3D_Final.h',
+  'source/BM3D.cpp',
+  'source/BM3D_Base.cpp',
+  'source/BM3D_Basic.cpp',
+  'source/BM3D_Final.cpp',
+  'source/VAggregate.cpp',
+  'source/VBM3D_Base.cpp',
+  'source/VBM3D_Basic.cpp',
+  'source/VBM3D_Final.cpp',
+  'source/VSPlugin.cpp'
+]
+
+vapoursynth_dep = dependency('vapoursynth').partial_dependency(compile_args : true, includes : true)
+
+fftw3f_dep = dependency('fftw3f')
+
+if host_machine.cpu_family().startswith('x86')
+  add_project_arguments('-mfpmath=sse', '-msse2', language : 'cpp')
+endif
+
+shared_module('bm3d', sources,
+  dependencies : [vapoursynth_dep, fftw3f_dep],
+  include_directories : include_directories('include'),
+  install : true,
+  install_dir : join_paths(vapoursynth_dep.get_pkgconfig_variable('libdir'), 'vapoursynth'),
+  gnu_symbol_visibility : 'hidden'
+)