Sweden-Number/dlls/qedit/nullrenderer.c

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/*
* Null renderer filter
*
* Copyright 2004 Christian Costa
* Copyright 2008 Maarten Lankhorst
*
* This library 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.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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
*/
#define COBJMACROS
#include "dshow.h"
#include "wine/debug.h"
#include "wine/strmbase.h"
WINE_DEFAULT_DEBUG_CHANNEL(qedit);
typedef struct NullRendererImpl
{
struct strmbase_renderer renderer;
} NullRendererImpl;
static inline NullRendererImpl *impl_from_strmbase_renderer(struct strmbase_renderer *iface)
{
return CONTAINING_RECORD(iface, NullRendererImpl, renderer);
}
static HRESULT WINAPI NullRenderer_DoRenderSample(struct strmbase_renderer *iface, IMediaSample *sample)
{
return S_OK;
}
static HRESULT WINAPI NullRenderer_CheckMediaType(struct strmbase_renderer *iface, const AM_MEDIA_TYPE *mt)
{
TRACE("Not a stub!\n");
return S_OK;
}
static void null_renderer_destroy(struct strmbase_renderer *iface)
{
NullRendererImpl *filter = impl_from_strmbase_renderer(iface);
strmbase_renderer_cleanup(&filter->renderer);
CoTaskMemFree(filter);
}
static const struct strmbase_renderer_ops renderer_ops =
{
.pfnCheckMediaType = NullRenderer_CheckMediaType,
.pfnDoRenderSample = NullRenderer_DoRenderSample,
.renderer_destroy = null_renderer_destroy,
};
HRESULT NullRenderer_create(IUnknown *outer, void **out)
{
static const WCHAR sink_name[] = {'I','n',0};
HRESULT hr;
NullRendererImpl *pNullRenderer;
*out = NULL;
pNullRenderer = CoTaskMemAlloc(sizeof(NullRendererImpl));
hr = strmbase_renderer_init(&pNullRenderer->renderer, outer,
&CLSID_NullRenderer, sink_name, &renderer_ops);
if (FAILED(hr))
CoTaskMemFree(pNullRenderer);
else
*out = &pNullRenderer->renderer.filter.IUnknown_inner;
return S_OK;
}