| /* |
| * Implementation of IEnumFilters Interface |
| * |
| * Copyright 2004 Christian Costa |
| * |
| * 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 |
| */ |
| |
| #include "quartz_private.h" |
| |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(quartz); |
| |
| typedef struct IEnumFiltersImpl |
| { |
| IEnumFilters IEnumFilters_iface; |
| LONG refCount; |
| IGraphVersion * pVersionSource; |
| LONG Version; |
| IBaseFilter *** pppFilters; |
| ULONG * pNumFilters; |
| ULONG uIndex; |
| } IEnumFiltersImpl; |
| |
| static const struct IEnumFiltersVtbl IEnumFiltersImpl_Vtbl; |
| |
| static inline IEnumFiltersImpl *impl_from_IEnumFilters(IEnumFilters *iface) |
| { |
| return CONTAINING_RECORD(iface, IEnumFiltersImpl, IEnumFilters_iface); |
| } |
| |
| HRESULT IEnumFiltersImpl_Construct(IGraphVersion * pVersionSource, IBaseFilter *** pppFilters, ULONG * pNumFilters, IEnumFilters ** ppEnum) |
| { |
| /* Note: The incoming IBaseFilter interfaces are not AddRef'd here as in Windows, |
| * they should have been previously AddRef'd. */ |
| IEnumFiltersImpl * pEnumFilters = CoTaskMemAlloc(sizeof(IEnumFiltersImpl)); |
| HRESULT hr; |
| LONG currentVersion; |
| |
| TRACE("(%p, %p, %p)\n", pppFilters, pNumFilters, ppEnum); |
| |
| *ppEnum = NULL; |
| |
| if (!pEnumFilters) |
| { |
| return E_OUTOFMEMORY; |
| } |
| |
| pEnumFilters->IEnumFilters_iface.lpVtbl = &IEnumFiltersImpl_Vtbl; |
| pEnumFilters->refCount = 1; |
| pEnumFilters->uIndex = 0; |
| pEnumFilters->pNumFilters = pNumFilters; |
| pEnumFilters->pppFilters = pppFilters; |
| IGraphVersion_AddRef(pVersionSource); |
| pEnumFilters->pVersionSource = pVersionSource; |
| |
| /* Store the current version of the graph */ |
| hr = IGraphVersion_QueryVersion(pVersionSource, ¤tVersion); |
| pEnumFilters->Version = (hr==S_OK) ? currentVersion : 0; |
| |
| *ppEnum = &pEnumFilters->IEnumFilters_iface; |
| return S_OK; |
| } |
| |
| static HRESULT WINAPI IEnumFiltersImpl_QueryInterface(IEnumFilters * iface, REFIID riid, LPVOID * ppv) |
| { |
| TRACE("(%p)->(%s, %p)\n", iface, qzdebugstr_guid(riid), ppv); |
| |
| *ppv = NULL; |
| |
| if (IsEqualIID(riid, &IID_IUnknown)) |
| *ppv = iface; |
| else if (IsEqualIID(riid, &IID_IEnumFilters)) |
| *ppv = iface; |
| |
| if (*ppv) |
| { |
| IUnknown_AddRef((IUnknown *)(*ppv)); |
| return S_OK; |
| } |
| |
| FIXME("No interface for %s!\n", qzdebugstr_guid(riid)); |
| |
| return E_NOINTERFACE; |
| } |
| |
| static ULONG WINAPI IEnumFiltersImpl_AddRef(IEnumFilters * iface) |
| { |
| IEnumFiltersImpl *This = impl_from_IEnumFilters(iface); |
| ULONG refCount = InterlockedIncrement(&This->refCount); |
| |
| TRACE("(%p)->()\n", iface); |
| |
| return refCount; |
| } |
| |
| static ULONG WINAPI IEnumFiltersImpl_Release(IEnumFilters * iface) |
| { |
| IEnumFiltersImpl *This = impl_from_IEnumFilters(iface); |
| ULONG refCount = InterlockedDecrement(&This->refCount); |
| |
| TRACE("(%p)->()\n", iface); |
| |
| if (!refCount) |
| { |
| IGraphVersion_Release(This->pVersionSource); |
| CoTaskMemFree(This); |
| return 0; |
| } |
| else |
| return refCount; |
| } |
| |
| static HRESULT WINAPI IEnumFiltersImpl_Next(IEnumFilters * iface, ULONG cFilters, IBaseFilter ** ppFilters, ULONG * pcFetched) |
| { |
| ULONG cFetched; |
| ULONG i; |
| LONG currentVersion; |
| IEnumFiltersImpl *This = impl_from_IEnumFilters(iface); |
| HRESULT hr; |
| |
| cFetched = min(*This->pNumFilters, This->uIndex + cFilters) - This->uIndex; |
| |
| TRACE("(%p)->(%u, %p, %p)\n", iface, cFilters, ppFilters, pcFetched); |
| |
| /* First of all check if the graph has changed */ |
| hr = IGraphVersion_QueryVersion(This->pVersionSource, ¤tVersion); |
| if (hr==S_OK && This->Version != currentVersion) |
| return VFW_E_ENUM_OUT_OF_SYNC; |
| |
| |
| if (!ppFilters) |
| return E_POINTER; |
| |
| for (i = 0; i < cFetched; i++) |
| { |
| ppFilters[i] = (*This->pppFilters)[This->uIndex + i]; |
| IBaseFilter_AddRef(ppFilters[i]); |
| } |
| |
| This->uIndex += cFetched; |
| |
| if (pcFetched) |
| *pcFetched = cFetched; |
| |
| if (cFetched != cFilters) |
| return S_FALSE; |
| return S_OK; |
| } |
| |
| static HRESULT WINAPI IEnumFiltersImpl_Skip(IEnumFilters * iface, ULONG cFilters) |
| { |
| IEnumFiltersImpl *This = impl_from_IEnumFilters(iface); |
| |
| TRACE("(%p)->(%u)\n", iface, cFilters); |
| |
| if (This->uIndex + cFilters < *This->pNumFilters) |
| { |
| This->uIndex += cFilters; |
| return S_OK; |
| } |
| return S_FALSE; |
| } |
| |
| static HRESULT WINAPI IEnumFiltersImpl_Reset(IEnumFilters * iface) |
| { |
| IEnumFiltersImpl *This = impl_from_IEnumFilters(iface); |
| HRESULT hr; |
| LONG currentVersion; |
| |
| TRACE("(%p)->()\n", iface); |
| |
| This->uIndex = 0; |
| hr = IGraphVersion_QueryVersion(This->pVersionSource, ¤tVersion); |
| if (hr == S_OK) |
| This->Version = currentVersion; |
| return S_OK; |
| } |
| |
| static HRESULT WINAPI IEnumFiltersImpl_Clone(IEnumFilters * iface, IEnumFilters ** ppEnum) |
| { |
| HRESULT hr; |
| IEnumFiltersImpl *This = impl_from_IEnumFilters(iface); |
| |
| TRACE("(%p)->(%p)\n", iface, ppEnum); |
| |
| hr = IEnumFiltersImpl_Construct(This->pVersionSource, This->pppFilters, This->pNumFilters, ppEnum); |
| if (FAILED(hr)) |
| return hr; |
| return IEnumFilters_Skip(*ppEnum, This->uIndex); |
| } |
| |
| static const IEnumFiltersVtbl IEnumFiltersImpl_Vtbl = |
| { |
| IEnumFiltersImpl_QueryInterface, |
| IEnumFiltersImpl_AddRef, |
| IEnumFiltersImpl_Release, |
| IEnumFiltersImpl_Next, |
| IEnumFiltersImpl_Skip, |
| IEnumFiltersImpl_Reset, |
| IEnumFiltersImpl_Clone |
| }; |