Sweden-Number/dlls/qedit/nullrenderer.c

105 lines
3.2 KiB
C

/*
* 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);
struct null_renderer
{
struct strmbase_renderer renderer;
HANDLE run_event;
};
static struct null_renderer *impl_from_strmbase_renderer(struct strmbase_renderer *iface)
{
return CONTAINING_RECORD(iface, struct null_renderer, renderer);
}
static HRESULT WINAPI NullRenderer_DoRenderSample(struct strmbase_renderer *iface, IMediaSample *sample)
{
struct null_renderer *filter = impl_from_strmbase_renderer(iface);
if (filter->renderer.filter.state == State_Paused)
{
const HANDLE events[2] = {filter->run_event, filter->renderer.flush_event};
SetEvent(filter->renderer.state_event);
WaitForMultipleObjects(2, events, FALSE, INFINITE);
}
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)
{
struct null_renderer *filter = impl_from_strmbase_renderer(iface);
CloseHandle(filter->run_event);
strmbase_renderer_cleanup(&filter->renderer);
free(filter);
}
static void null_renderer_start_stream(struct strmbase_renderer *iface)
{
struct null_renderer *filter = impl_from_strmbase_renderer(iface);
SetEvent(filter->run_event);
}
static void null_renderer_stop_stream(struct strmbase_renderer *iface)
{
struct null_renderer *filter = impl_from_strmbase_renderer(iface);
ResetEvent(filter->run_event);
}
static const struct strmbase_renderer_ops renderer_ops =
{
.pfnCheckMediaType = NullRenderer_CheckMediaType,
.pfnDoRenderSample = NullRenderer_DoRenderSample,
.renderer_start_stream = null_renderer_start_stream,
.renderer_stop_stream = null_renderer_stop_stream,
.renderer_destroy = null_renderer_destroy,
};
HRESULT null_renderer_create(IUnknown *outer, IUnknown **out)
{
struct null_renderer *object;
if (!(object = calloc(1, sizeof(*object))))
return E_OUTOFMEMORY;
strmbase_renderer_init(&object->renderer, outer, &CLSID_NullRenderer, L"In", &renderer_ops);
object->run_event = CreateEventW(NULL, TRUE, FALSE, NULL);
TRACE("Created null renderer %p.\n", object);
*out = &object->renderer.filter.IUnknown_inner;
return S_OK;
}