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216 lines
5.9 KiB
C
216 lines
5.9 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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IEnumFilters IEnumFilters_iface;
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LONG refCount;
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IGraphVersion * pVersionSource;
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LONG Version;
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IBaseFilter *** pppFilters;
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ULONG * pNumFilters;
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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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static inline IEnumFiltersImpl *impl_from_IEnumFilters(IEnumFilters *iface)
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{
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return CONTAINING_RECORD(iface, IEnumFiltersImpl, IEnumFilters_iface);
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}
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HRESULT IEnumFiltersImpl_Construct(IGraphVersion * pVersionSource, IBaseFilter *** pppFilters, ULONG * pNumFilters, 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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HRESULT hr;
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LONG currentVersion;
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TRACE("(%p, %p, %p)\n", pppFilters, pNumFilters, 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->IEnumFilters_iface.lpVtbl = &IEnumFiltersImpl_Vtbl;
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pEnumFilters->refCount = 1;
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pEnumFilters->uIndex = 0;
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pEnumFilters->pNumFilters = pNumFilters;
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pEnumFilters->pppFilters = pppFilters;
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IGraphVersion_AddRef(pVersionSource);
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pEnumFilters->pVersionSource = pVersionSource;
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/* Store the current version of the graph */
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hr = IGraphVersion_QueryVersion(pVersionSource, ¤tVersion);
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pEnumFilters->Version = (hr==S_OK) ? currentVersion : 0;
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*ppEnum = &pEnumFilters->IEnumFilters_iface;
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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 = impl_from_IEnumFilters(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 = impl_from_IEnumFilters(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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IGraphVersion_Release(This->pVersionSource);
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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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LONG currentVersion;
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IEnumFiltersImpl *This = impl_from_IEnumFilters(iface);
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HRESULT hr;
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cFetched = min(*This->pNumFilters, This->uIndex + cFilters) - This->uIndex;
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TRACE("(%p)->(%u, %p, %p)\n", iface, cFilters, ppFilters, pcFetched);
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/* First of all check if the graph has changed */
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hr = IGraphVersion_QueryVersion(This->pVersionSource, ¤tVersion);
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if (hr==S_OK && This->Version != currentVersion)
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return VFW_E_ENUM_OUT_OF_SYNC;
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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->pppFilters)[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 = impl_from_IEnumFilters(iface);
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TRACE("(%p)->(%u)\n", iface, cFilters);
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if (This->uIndex + cFilters < *This->pNumFilters)
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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 = impl_from_IEnumFilters(iface);
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HRESULT hr;
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LONG currentVersion;
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TRACE("(%p)->()\n", iface);
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This->uIndex = 0;
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hr = IGraphVersion_QueryVersion(This->pVersionSource, ¤tVersion);
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if (hr == S_OK)
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This->Version = currentVersion;
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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 = impl_from_IEnumFilters(iface);
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TRACE("(%p)->(%p)\n", iface, ppEnum);
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hr = IEnumFiltersImpl_Construct(This->pVersionSource, This->pppFilters, This->pNumFilters, 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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