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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_VSRC_GFXCAPTURE_WINRT_H
#define AVFILTER_VSRC_GFXCAPTURE_WINRT_H
extern "C" {
#include "config.h"
}
#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0A00
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0A00
#endif
#define WINDOWS_FOUNDATION_UNIVERSALAPICONTRACT_VERSION 0x130000
// work around bug in mingw double-defining IReference<unsigned char> (BYTE == boolean)
#define ____FIReference_1_boolean_INTERFACE_DEFINED__
#include <windows.h>
#include <initguid.h>
#include <wrl.h>
#include <roapi.h>
#include <windows.foundation.h>
#include <atomic>
#include <functional>
#include <memory>
// Forward-declare IDirect3DDxgiInterfaceAccess if headers too old
#if !HAVE_IDIRECT3DDXGIINTERFACEACCESS
namespace Windows::Graphics::DirectX::Direct3D11 {
MIDL_INTERFACE("A9B3D012-3DF2-4EE3-B8D1-8695F457D3C1")
IDirect3DDxgiInterfaceAccess : public IUnknown
{
public:
IFACEMETHOD(GetInterface)(REFIID iid, _COM_Outptr_ void** p) = 0;
};
}
#ifdef __MINGW32__
__CRT_UUID_DECL(Windows::Graphics::DirectX::Direct3D11::IDirect3DDxgiInterfaceAccess,
0xa9b3d012, 0x3df2, 0x4ee3, 0xb8, 0xd1, 0x86, 0x95, 0xf4, 0x57, 0xd3, 0xc1)
#endif
#endif /* !HAVE_IDIRECT3DDXGIINTERFACEACCESS */
// Forward-declare IGraphicsCaptureSession5 if headers too old
#if !HAVE___X_ABI_CWINDOWS_CGRAPHICS_CCAPTURE_CIGRAPHICSCAPTURESESSION5
namespace ABI::Windows ::Graphics::Capture {
MIDL_INTERFACE("67C0EA62-1F85-5061-925A-239BE0AC09CB")
IGraphicsCaptureSession5 : public IInspectable
{
public:
IFACEMETHOD(get_MinUpdateInterval)(ABI::Windows::Foundation::TimeSpan* value) = 0;
IFACEMETHOD(put_MinUpdateInterval)(ABI::Windows::Foundation::TimeSpan value) = 0;
};
}
#ifdef __MINGW32__
__CRT_UUID_DECL(ABI::Windows ::Graphics::Capture::IGraphicsCaptureSession5,
0x67c0ea62, 0x1f85, 0x5061, 0x92, 0x5a, 0x23, 0x9b, 0xe0, 0xac, 0x09, 0xcb)
#endif
#endif /* !HAVE___X_ABI_CWINDOWS_CGRAPHICS_CCAPTURE_CIGRAPHICSCAPTURESESSION5 */
/****************************************************
* Helper class to implement refcounted COM objects *
****************************************************/
template<typename... Interfaces>
struct FFComObject : Interfaces...
{
virtual ~FFComObject() = default;
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject) override
{
if (!ppvObject)
return E_POINTER;
if (query_all<Interfaces...>(riid, ppvObject))
{
AddRef();
return S_OK;
}
*ppvObject = nullptr;
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE AddRef() override
{
return ++ref_count;
}
ULONG STDMETHODCALLTYPE Release() override
{
ULONG rc = --ref_count;
if (rc == 0)
delete this;
return rc;
}
private:
template <typename Iface, typename... IFaces>
bool query_all(REFIID riid, void** ppvObject)
{
if (riid == __uuidof(Iface)) {
*ppvObject = static_cast<Iface*>(this);
return true;
}
if constexpr (sizeof...(IFaces)) {
return query_all<IFaces...>(riid, ppvObject);
} else if (riid == __uuidof(IUnknown)) {
*ppvObject = static_cast<IUnknown*>(static_cast<Iface*>(this));
return true;
}
return false;
}
std::atomic<ULONG> ref_count { 1 };
};
/*******************************************
* Helper to implement COM/WinRT callbacks *
*******************************************/
template<class Iface, typename F, typename... Args>
struct FFTypedCBHandler : FFComObject<Iface, IAgileObject>
{
using Func = std::decay_t<F>;
explicit FFTypedCBHandler(F&& f) : cb_func(std::forward<F>(f)) {}
std::invoke_result_t<Func&, Args...> STDMETHODCALLTYPE Invoke(Args... args) override
{
if constexpr (std::is_same_v<std::invoke_result_t<Func&, Args...>, HRESULT>) {
return cb_func(std::forward<Args>(args)...);
} else {
cb_func(std::forward<Args>(args)...);
return S_OK;
}
}
private:
Func cb_func;
};
template<class Iface, typename... Args, typename F>
static Microsoft::WRL::ComPtr<Iface> create_cb_handler(F&& cb_func)
{
Microsoft::WRL::ComPtr<Iface> res;
res.Attach(new FFTypedCBHandler<Iface, F, Args...>(std::forward<F>(cb_func)));
return res;
}
/******************************************
* Helpers to implement C style callbacks *
******************************************/
template <typename Ret, typename... Args>
struct Win32Callback {
std::function<Ret(Args...)> fn;
static Ret CALLBACK thunk(Args... args, LPARAM lparam) {
auto self = reinterpret_cast<Win32Callback*>(lparam);
return self->fn(std::forward<Args>(args)...);
}
decltype(&Win32Callback::thunk) proc = &Win32Callback::thunk;
LPARAM lparam = 0;
};
template <typename Ret, typename... Args>
auto make_win32_callback(const std::function<Ret(Args...)> &&fn) {
using T = Win32Callback<Ret, Args...>;
auto res = std::make_unique<T>(T{ std::forward<decltype(fn)>(fn) });
res->lparam = reinterpret_cast<LPARAM>(res.get());
return res;
}
#define make_win32_callback(...) make_win32_callback(std::function(__VA_ARGS__))
/*****************************
* Small convenience helpers *
*****************************/
struct HMODULEDeleter {
typedef HMODULE pointer;
void operator()(HMODULE handle) const {
if (handle)
FreeLibrary(handle);
}
};
typedef std::unique_ptr<HMODULE, HMODULEDeleter> hmodule_ptr_t;
struct HANDLEDeleter {
typedef HANDLE pointer;
void operator()(HANDLE handle) const {
if (handle && handle != INVALID_HANDLE_VALUE)
CloseHandle(handle);
}
};
typedef std::unique_ptr<HANDLE, HANDLEDeleter> handle_ptr_t;
#define HLSL(shader) #shader
#endif /* AVFILTER_VSRC_GFXCAPTURE_WINRT_H */
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