d3d12_sources = [
  'gstd3d12av1dec.cpp',
  'gstd3d12basefilter.cpp',
  'gstd3d12compositor.cpp',
  'gstd3d12convert.cpp',
  'gstd3d12decoder.cpp',
  'gstd3d12decodercpbpool.cpp',
  'gstd3d12dpbstorage.cpp',
  'gstd3d12dxgicapture.cpp',
  'gstd3d12encoder.cpp',
  'gstd3d12encoderbufferpool.cpp',
  'gstd3d12h264dec.cpp',
  'gstd3d12h264enc.cpp',
  'gstd3d12h265dec.cpp',
  'gstd3d12ipc.cpp',
  'gstd3d12ipcclient.cpp',
  'gstd3d12ipcserver.cpp',
  'gstd3d12ipcsink.cpp',
  'gstd3d12ipcsrc.cpp',
  'gstd3d12mpeg2dec.cpp',
  'gstd3d12overlaycompositor.cpp',
  'gstd3d12pluginutils.cpp',
  'gstd3d12screencapture.cpp',
  'gstd3d12screencapturedevice.cpp',
  'gstd3d12screencapturesrc.cpp',
  'gstd3d12testsrc.cpp',
  'gstd3d12videosink.cpp',
  'gstd3d12vp8dec.cpp',
  'gstd3d12vp9dec.cpp',
  'gstd3d12window-swapchain.cpp',
  'gstd3d12window-win32.cpp',
  'gstd3d12window.cpp',
  'plugin.cpp',
]

extra_args = [
  '-DGST_USE_UNSTABLE_API',
  '-DGST_D3D12_USE_DIRECTX_HEADERS',
]

# Disable this warning error. Otherwise d3dx12.h will break build
if cc.get_argument_syntax() == 'msvc'
  extra_args += cc.get_supported_arguments([
    '/wd4062', # 'identifier' : unreferenced local variable
  ])
else
  extra_args += cc.get_supported_arguments([
    '-Wno-misleading-indentation',
    # MinGW 32bits compiler seems to be complaining about redundant-decls
    # when ComPtr is in use. Let's just disable the warning
    '-Wno-redundant-decls',
  ])
endif

extra_deps = []

d3d12_option = get_option('d3d12')
d3d12_wgc_option = get_option('d3d12-wgc')
if host_system != 'windows' or d3d12_option.disabled()
  subdir_done()
endif

d3d11_lib = cc.find_library('d3d11', required : d3d12_option)
d2d_lib = cc.find_library('d2d1', required: d3d12_option)
dwmapi_lib = cc.find_library('dwmapi', required: d3d12_wgc_option)
dx_headers_dep = dependency('DirectX-Headers',
    version: '>= 1.611',
    allow_fallback: true,
    required: d3d12_option)

if not gstdxva_dep.found() or not gstd3d12_dep.found() or not gstd3dshader_dep.found() \
  or not dx_headers_dep.found() or not d2d_lib.found() or not d3d11_lib.found()
  if d3d12_option.enabled()
    error('The d3d12 was enabled explicitly, but required dependencies were not found.')
  endif
  subdir_done()
endif

have_wgc = false
if not d3d12_wgc_option.disabled()
  have_wgc = cxx.compiles('''
    #include<windows.h>
    #include<winstring.h>
    #include<roapi.h>
    #include<windows.graphics.capture.h>,
    #include<windows.graphics.capture.interop.h>
    #include<windows.graphics.directx.direct3d11.h>
    #include<windows.graphics.directx.direct3d11.interop.h>
    #include<wrl.h>
    using namespace Microsoft::WRL;
    using namespace ABI::Windows::Graphics::Capture;
    ComPtr<IDirect3D11CaptureFramePoolStatics> pool_statics;
    ComPtr<IDirect3D11CaptureFramePool> pool;
    ComPtr<IGraphicsCaptureSession> session;
    ComPtr<IGraphicsCaptureSession2> session2;
    ComPtr<IGraphicsCaptureSession3> session3;
    ''',
    name: 'Windows Graphics Capture support in Windows SDK')

  if d3d12_wgc_option.enabled() and not have_wgc
    error('The Windows Graphics Capture feature is enabled but not supported by Windows SDK')
  endif
endif

have_dx_math = cxx.compiles('''
    #include <windows.h>
    #include <DirectXMath.h>
    using namespace DirectX;
    int main(int argc, char ** argv) {
      XMMATRIX matrix;
      XMFLOAT4X4 dump;
      matrix = XMMatrixIdentity ();
      XMStoreFloat4x4 (&dump, matrix);
      return 0;
    }
    ''',
    name: 'DirectXMath support in Windows SDK')

if not have_dx_math
  directxmath_dep = dependency('directxmath',
      allow_fallback: true,
      required: d3d12_option)
  if not directxmath_dep.found()
    subdir_done()
  endif
  extra_deps += [directxmath_dep]
endif

d3d12_headers = [
  'd3d11.h',
  'd2d1_3.h',
]

have_d3d12_headers = true
foreach h: d3d12_headers
  if not cc.has_header(h)
    have_d3d12_headers = false
  endif
endforeach

if not have_d3d12_headers
  if d3d12_option.enabled()
    error('The d3d12 plugin was enabled explicitly, but required dependencies were not found.')
  endif
  subdir_done()
endif

# https://learn.microsoft.com/en-us/windows/win32/dxmath/pg-xnamath-internals#windows-sse-versus-sse2
# x86 with Windows 7 or older may not support SSE2
if host_machine.cpu_family() != 'x86'
  extra_args += ['-DHAVE_DIRECTX_MATH_SIMD']
endif

if have_wgc and dwmapi_lib.found()
  d3d12_sources += ['gstd3d12graphicscapture.cpp']
  extra_args += ['-DHAVE_WGC']
  extra_deps += [dwmapi_lib]
endif

if gstd3d11_dep.found()
  extra_args += ['-DHAVE_GST_D3D11']
  extra_deps += [gstd3d11_dep]
  d3d12_sources += [
    'gstd3d12memorycopy.cpp',
  ]
else
  d3d12_sources += [
    'gstd3d12download.cpp',
    'gstd3d12upload.cpp',
  ]
endif

gstd3d12 = library('gstd3d12',
  d3d12_sources,
  c_args : gst_plugins_bad_args + extra_args,
  cpp_args: gst_plugins_bad_args + extra_args,
  include_directories : [configinc],
  dependencies : [gstbase_dep, gstvideo_dep, gstcodecs_dep, gmodule_dep,
                  gstdxva_dep, gstd3dshader_dep, gstd3d12_dep, d3d11_lib,
                  d2d_lib, dx_headers_dep] + extra_deps,
  install : true,
  install_dir : plugins_install_dir,
)
plugins += [gstd3d12]