mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 09:00:54 +00:00
137 lines
3.7 KiB
C++
137 lines
3.7 KiB
C++
/* GStreamer
|
|
* Copyright (C) 2007 Sebastien Moutte <sebastien@moutte.net>
|
|
*
|
|
* gstdshow.cpp:
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <atlbase.h>
|
|
#include <dmodshow.h>
|
|
#include <dmoreg.h>
|
|
|
|
#include "gstdshowutil.h"
|
|
#include "gstdshowfakesrc.h"
|
|
|
|
IPin *
|
|
gst_dshow_get_pin_from_filter (IBaseFilter *filter, PIN_DIRECTION pindir)
|
|
{
|
|
CComPtr<IEnumPins> enumpins;
|
|
CComPtr<IPin> pin;
|
|
HRESULT hres;
|
|
|
|
hres = filter->EnumPins (&enumpins);
|
|
if (FAILED(hres)) {
|
|
return NULL;
|
|
}
|
|
|
|
while (enumpins->Next (1, &pin, NULL) == S_OK)
|
|
{
|
|
PIN_DIRECTION pindirtmp;
|
|
hres = pin->QueryDirection (&pindirtmp);
|
|
if (hres == S_OK && pindir == pindirtmp) {
|
|
return pin;
|
|
}
|
|
pin.Release();
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
IBaseFilter *
|
|
gst_dshow_find_filter(CLSID input_majortype, CLSID input_subtype,
|
|
CLSID output_majortype, CLSID output_subtype,
|
|
PreferredFilter *preferred_filters)
|
|
{
|
|
HRESULT hres;
|
|
GUID inTypes[2];
|
|
GUID outTypes[2];
|
|
CComPtr<IFilterMapper2> mapper;
|
|
CComPtr<IEnumMoniker> enum_moniker;
|
|
CComPtr<IMoniker> moniker;
|
|
ULONG fetched;
|
|
IBaseFilter *filter;
|
|
|
|
/* First, see if any of our preferred filters is available.
|
|
* If not, we fall back to the highest-ranked installed filter */
|
|
if (preferred_filters) {
|
|
while (preferred_filters->filter_guid)
|
|
{
|
|
/* If the filter is a DMO, we need to do this a bit differently */
|
|
if (preferred_filters->dmo_category)
|
|
{
|
|
CComPtr<IDMOWrapperFilter> wrapper;
|
|
|
|
hres = CoCreateInstance (CLSID_DMOWrapperFilter, NULL,
|
|
CLSCTX_INPROC,
|
|
IID_IBaseFilter, (void **)&filter);
|
|
if (SUCCEEDED(hres)) {
|
|
hres = filter->QueryInterface (&wrapper);
|
|
if (SUCCEEDED(hres)) {
|
|
hres = wrapper->Init (*preferred_filters->filter_guid,
|
|
*preferred_filters->dmo_category);
|
|
if (SUCCEEDED(hres))
|
|
return filter;
|
|
}
|
|
filter->Release();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
hres = CoCreateInstance (*preferred_filters->filter_guid,
|
|
NULL, CLSCTX_INPROC,
|
|
IID_IBaseFilter, (void **)&filter);
|
|
if (SUCCEEDED(hres))
|
|
return filter;
|
|
}
|
|
|
|
/* Continue to the next filter */
|
|
preferred_filters++;
|
|
}
|
|
}
|
|
|
|
hres = CoCreateInstance(CLSID_FilterMapper2, NULL, CLSCTX_INPROC,
|
|
IID_IFilterMapper2, (void **) &mapper);
|
|
if (FAILED(hres))
|
|
return NULL;
|
|
|
|
inTypes[0] = input_majortype;
|
|
inTypes[1] = input_subtype;
|
|
outTypes[0] = output_majortype;
|
|
outTypes[1] = output_subtype;
|
|
|
|
hres = mapper->EnumMatchingFilters (&enum_moniker, 0,
|
|
FALSE, MERIT_DO_NOT_USE+1,
|
|
TRUE, 1, inTypes, NULL, NULL, FALSE,
|
|
TRUE, 1, outTypes, NULL, NULL);
|
|
if (FAILED(hres))
|
|
return NULL;
|
|
|
|
enum_moniker->Reset ();
|
|
|
|
while(enum_moniker->Next (1, &moniker, &fetched) == S_OK)
|
|
{
|
|
hres = moniker->BindToObject(NULL, NULL,
|
|
IID_IBaseFilter, (void**)&filter);
|
|
if(SUCCEEDED(hres)) {
|
|
return filter;
|
|
}
|
|
moniker.Release ();
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|