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137 lines
3.7 KiB
C++
137 lines
3.7 KiB
C++
/* GStreamer
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* Copyright (C) 2007 Sebastien Moutte <sebastien@moutte.net>
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*
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* gstdshow.cpp:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <atlbase.h>
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#include <dmodshow.h>
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#include <dmoreg.h>
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#include "gstdshowutil.h"
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#include "gstdshowfakesrc.h"
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IPin *
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gst_dshow_get_pin_from_filter (IBaseFilter *filter, PIN_DIRECTION pindir)
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{
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CComPtr<IEnumPins> enumpins;
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CComPtr<IPin> pin;
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HRESULT hres;
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hres = filter->EnumPins (&enumpins);
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if (FAILED(hres)) {
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return NULL;
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}
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while (enumpins->Next (1, &pin, NULL) == S_OK)
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{
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PIN_DIRECTION pindirtmp;
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hres = pin->QueryDirection (&pindirtmp);
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if (hres == S_OK && pindir == pindirtmp) {
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return pin;
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}
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pin.Release();
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}
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return NULL;
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}
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IBaseFilter *
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gst_dshow_find_filter(CLSID input_majortype, CLSID input_subtype,
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CLSID output_majortype, CLSID output_subtype,
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PreferredFilter *preferred_filters)
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{
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HRESULT hres;
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GUID inTypes[2];
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GUID outTypes[2];
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CComPtr<IFilterMapper2> mapper;
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CComPtr<IEnumMoniker> enum_moniker;
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CComPtr<IMoniker> moniker;
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ULONG fetched;
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IBaseFilter *filter;
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/* First, see if any of our preferred filters is available.
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* If not, we fall back to the highest-ranked installed filter */
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if (preferred_filters) {
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while (preferred_filters->filter_guid)
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{
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/* If the filter is a DMO, we need to do this a bit differently */
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if (preferred_filters->dmo_category)
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{
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CComPtr<IDMOWrapperFilter> wrapper;
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hres = CoCreateInstance (CLSID_DMOWrapperFilter, NULL,
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CLSCTX_INPROC,
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IID_IBaseFilter, (void **)&filter);
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if (SUCCEEDED(hres)) {
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hres = filter->QueryInterface (&wrapper);
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if (SUCCEEDED(hres)) {
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hres = wrapper->Init (*preferred_filters->filter_guid,
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*preferred_filters->dmo_category);
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if (SUCCEEDED(hres))
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return filter;
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}
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filter->Release();
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}
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}
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else
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{
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hres = CoCreateInstance (*preferred_filters->filter_guid,
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NULL, CLSCTX_INPROC,
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IID_IBaseFilter, (void **)&filter);
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if (SUCCEEDED(hres))
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return filter;
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}
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/* Continue to the next filter */
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preferred_filters++;
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}
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}
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hres = CoCreateInstance(CLSID_FilterMapper2, NULL, CLSCTX_INPROC,
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IID_IFilterMapper2, (void **) &mapper);
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if (FAILED(hres))
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return NULL;
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inTypes[0] = input_majortype;
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inTypes[1] = input_subtype;
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outTypes[0] = output_majortype;
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outTypes[1] = output_subtype;
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hres = mapper->EnumMatchingFilters (&enum_moniker, 0,
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FALSE, MERIT_DO_NOT_USE+1,
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TRUE, 1, inTypes, NULL, NULL, FALSE,
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TRUE, 1, outTypes, NULL, NULL);
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if (FAILED(hres))
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return NULL;
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enum_moniker->Reset ();
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while(enum_moniker->Next (1, &moniker, &fetched) == S_OK)
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{
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hres = moniker->BindToObject(NULL, NULL,
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IID_IBaseFilter, (void**)&filter);
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if(SUCCEEDED(hres)) {
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return filter;
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}
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moniker.Release ();
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}
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return NULL;
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}
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