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195 lines
5 KiB
C
195 lines
5 KiB
C
/*
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* Implementation of IEnumFilters Interface
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*
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* Copyright 2004 Christian Costa
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "quartz_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(quartz);
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typedef struct IEnumFiltersImpl
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{
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const IEnumFiltersVtbl * lpVtbl;
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LONG refCount;
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IBaseFilter ** ppFilters;
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int nFilters;
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ULONG uIndex;
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} IEnumFiltersImpl;
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static const struct IEnumFiltersVtbl IEnumFiltersImpl_Vtbl;
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HRESULT IEnumFiltersImpl_Construct(IBaseFilter ** ppFilters, ULONG nFilters, IEnumFilters ** ppEnum)
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{
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/* Note: The incoming IBaseFilter interfaces are not AddRef'd here as in Windows,
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* they should have been previously AddRef'd. */
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IEnumFiltersImpl * pEnumFilters = CoTaskMemAlloc(sizeof(IEnumFiltersImpl));
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TRACE("(%p, %d, %p)\n", ppFilters, nFilters, ppEnum);
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*ppEnum = NULL;
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if (!pEnumFilters)
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{
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return E_OUTOFMEMORY;
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}
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pEnumFilters->lpVtbl = &IEnumFiltersImpl_Vtbl;
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pEnumFilters->refCount = 1;
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pEnumFilters->uIndex = 0;
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pEnumFilters->nFilters = nFilters;
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pEnumFilters->ppFilters = CoTaskMemAlloc(sizeof(IBaseFilter*) * nFilters);
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if (!pEnumFilters->ppFilters)
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{
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CoTaskMemFree(pEnumFilters);
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return E_OUTOFMEMORY;
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}
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memcpy(pEnumFilters->ppFilters, ppFilters, nFilters * sizeof(IBaseFilter*));
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*ppEnum = (IEnumFilters *)(&pEnumFilters->lpVtbl);
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return S_OK;
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}
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static HRESULT WINAPI IEnumFiltersImpl_QueryInterface(IEnumFilters * iface, REFIID riid, LPVOID * ppv)
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{
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TRACE("(%p)->(%s, %p)\n", iface, qzdebugstr_guid(riid), ppv);
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*ppv = NULL;
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if (IsEqualIID(riid, &IID_IUnknown))
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*ppv = iface;
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else if (IsEqualIID(riid, &IID_IEnumFilters))
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*ppv = iface;
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if (*ppv)
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{
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IUnknown_AddRef((IUnknown *)(*ppv));
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return S_OK;
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}
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FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
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return E_NOINTERFACE;
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}
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static ULONG WINAPI IEnumFiltersImpl_AddRef(IEnumFilters * iface)
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{
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IEnumFiltersImpl *This = (IEnumFiltersImpl *)iface;
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ULONG refCount = InterlockedIncrement(&This->refCount);
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TRACE("(%p)->()\n", iface);
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return refCount;
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}
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static ULONG WINAPI IEnumFiltersImpl_Release(IEnumFilters * iface)
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{
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IEnumFiltersImpl *This = (IEnumFiltersImpl *)iface;
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ULONG refCount = InterlockedDecrement(&This->refCount);
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TRACE("(%p)->()\n", iface);
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if (!refCount)
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{
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CoTaskMemFree(This->ppFilters);
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CoTaskMemFree(This);
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return 0;
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}
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else
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return refCount;
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}
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static HRESULT WINAPI IEnumFiltersImpl_Next(IEnumFilters * iface, ULONG cFilters, IBaseFilter ** ppFilters, ULONG * pcFetched)
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{
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ULONG cFetched;
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ULONG i;
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IEnumFiltersImpl *This = (IEnumFiltersImpl *)iface;
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cFetched = min(This->nFilters, This->uIndex + cFilters) - This->uIndex;
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TRACE("(%p)->(%u, %p, %p)\n", iface, cFilters, ppFilters, pcFetched);
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if (!ppFilters)
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return E_POINTER;
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for (i = 0; i < cFetched; i++)
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{
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ppFilters[i] = This->ppFilters[This->uIndex + i];
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IBaseFilter_AddRef(ppFilters[i]);
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}
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This->uIndex += cFetched;
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if (pcFetched)
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*pcFetched = cFetched;
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if (cFetched != cFilters)
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return S_FALSE;
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return S_OK;
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}
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static HRESULT WINAPI IEnumFiltersImpl_Skip(IEnumFilters * iface, ULONG cFilters)
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{
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IEnumFiltersImpl *This = (IEnumFiltersImpl *)iface;
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TRACE("(%p)->(%u)\n", iface, cFilters);
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if (This->uIndex + cFilters < This->nFilters)
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{
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This->uIndex += cFilters;
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return S_OK;
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}
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return S_FALSE;
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}
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static HRESULT WINAPI IEnumFiltersImpl_Reset(IEnumFilters * iface)
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{
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IEnumFiltersImpl *This = (IEnumFiltersImpl *)iface;
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TRACE("(%p)->()\n", iface);
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This->uIndex = 0;
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return S_OK;
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}
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static HRESULT WINAPI IEnumFiltersImpl_Clone(IEnumFilters * iface, IEnumFilters ** ppEnum)
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{
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HRESULT hr;
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IEnumFiltersImpl *This = (IEnumFiltersImpl *)iface;
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TRACE("(%p)->(%p)\n", iface, ppEnum);
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hr = IEnumFiltersImpl_Construct(This->ppFilters, This->nFilters, ppEnum);
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if (FAILED(hr))
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return hr;
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return IEnumFilters_Skip(*ppEnum, This->uIndex);
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}
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static const IEnumFiltersVtbl IEnumFiltersImpl_Vtbl =
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{
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IEnumFiltersImpl_QueryInterface,
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IEnumFiltersImpl_AddRef,
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IEnumFiltersImpl_Release,
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IEnumFiltersImpl_Next,
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IEnumFiltersImpl_Skip,
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IEnumFiltersImpl_Reset,
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IEnumFiltersImpl_Clone
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};
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