gstreamer/subprojects/gst-plugins-bad/sys/mediafoundation/gstmfplatloader.c

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/* GStreamer
* Copyright (C) 2021 Seungha Yang <seungha@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstmfplatloader.h"
#include "gstmfconfig.h"
#include <gmodule.h>
/* *INDENT-OFF* */
G_BEGIN_DECLS
GST_DEBUG_CATEGORY_EXTERN (gst_mf_debug);
#define GST_CAT_DEFAULT gst_mf_debug
G_END_DECLS
#define LOAD_SYMBOL(name,func) G_STMT_START { \
if (!g_module_symbol (module, G_STRINGIFY (name), (gpointer *) &vtable->func)) { \
GST_WARNING ("Failed to load '%s', %s", G_STRINGIFY (name), g_module_error()); \
goto out; \
} \
} G_STMT_END;
typedef struct _GstMFPlatVTable
{
gboolean loaded;
HRESULT (__stdcall * GstMFTEnum2) (GUID guidCategory,
UINT32 Flags,
const MFT_REGISTER_TYPE_INFO * pInputType,
const MFT_REGISTER_TYPE_INFO * pOutputType,
IMFAttributes * pAttributes,
IMFActivate *** pppMFTActivate,
UINT32 * pnumMFTActivate);
HRESULT (__stdcall * GstMFCreateDXGIDeviceManager) (UINT * resetToken,
IMFDXGIDeviceManager ** ppDeviceManager);
HRESULT (__stdcall * GstMFCreateVideoSampleAllocatorEx) (REFIID riid,
void** ppSampleAllocator);
} GstMFPlatVTable;
/* *INDENT-ON* */
static GstMFPlatVTable gst_mf_plat_vtable = { 0, };
static gboolean
load_library_once (void)
{
static gsize load_once = 0;
if (g_once_init_enter (&load_once)) {
#if GST_MF_HAVE_D3D11
GModule *module;
GstMFPlatVTable *vtable = &gst_mf_plat_vtable;
module = g_module_open ("mfplat.dll", G_MODULE_BIND_LAZY);
if (!module)
goto out;
LOAD_SYMBOL (MFTEnum2, GstMFTEnum2);
LOAD_SYMBOL (MFCreateDXGIDeviceManager, GstMFCreateDXGIDeviceManager);
LOAD_SYMBOL (MFCreateVideoSampleAllocatorEx,
GstMFCreateVideoSampleAllocatorEx);
vtable->loaded = TRUE;
#endif
out:
g_once_init_leave (&load_once, 1);
}
return gst_mf_plat_vtable.loaded;
}
gboolean
gst_mf_plat_load_library (void)
{
return load_library_once ();
}
HRESULT __stdcall
GstMFTEnum2 (GUID guidCategory, UINT32 Flags,
const MFT_REGISTER_TYPE_INFO * pInputType,
const MFT_REGISTER_TYPE_INFO * pOutputType,
IMFAttributes * pAttributes, IMFActivate *** pppMFTActivate,
UINT32 * pnumMFTActivate)
{
g_assert (gst_mf_plat_vtable.GstMFTEnum2 != NULL);
return gst_mf_plat_vtable.GstMFTEnum2 (guidCategory, Flags, pInputType,
pOutputType, pAttributes, pppMFTActivate, pnumMFTActivate);
}
HRESULT __stdcall
GstMFCreateDXGIDeviceManager (UINT * resetToken,
IMFDXGIDeviceManager ** ppDeviceManager)
{
g_assert (gst_mf_plat_vtable.GstMFCreateDXGIDeviceManager != NULL);
return gst_mf_plat_vtable.GstMFCreateDXGIDeviceManager (resetToken,
ppDeviceManager);
}
HRESULT __stdcall
GstMFCreateVideoSampleAllocatorEx (REFIID riid, void **ppSampleAllocator)
{
g_assert (gst_mf_plat_vtable.GstMFCreateVideoSampleAllocatorEx != NULL);
return gst_mf_plat_vtable.GstMFCreateVideoSampleAllocatorEx (riid,
ppSampleAllocator);
}