2 * Implementation of IEnumPins Interface
4 * Copyright 2003 Robert Shearman
5 * Copyright 2010 Aric Stewart, CodeWeavers
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
25 #include "wine/strmbase.h"
26 #include "wine/debug.h"
28 WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
30 typedef struct IEnumPinsImpl
32 IEnumPins IEnumPins_iface;
36 BaseFilter_GetPin receive_pin;
37 BaseFilter_GetPinCount receive_pincount;
38 BaseFilter_GetPinVersion receive_version;
42 static inline IEnumPinsImpl *impl_from_IEnumPins(IEnumPins *iface)
44 return CONTAINING_RECORD(iface, IEnumPinsImpl, IEnumPins_iface);
47 static const struct IEnumPinsVtbl IEnumPinsImpl_Vtbl;
49 HRESULT WINAPI EnumPins_Construct(BaseFilter *base, BaseFilter_GetPin receive_pin, BaseFilter_GetPinCount receive_pincount, BaseFilter_GetPinVersion receive_version, IEnumPins ** ppEnum)
51 IEnumPinsImpl * pEnumPins;
56 pEnumPins = CoTaskMemAlloc(sizeof(IEnumPinsImpl));
62 pEnumPins->IEnumPins_iface.lpVtbl = &IEnumPinsImpl_Vtbl;
63 pEnumPins->refCount = 1;
64 pEnumPins->uIndex = 0;
65 pEnumPins->receive_pin = receive_pin;
66 pEnumPins->receive_pincount = receive_pincount;
67 pEnumPins->receive_version = receive_version;
68 pEnumPins->base = base;
69 IBaseFilter_AddRef((IBaseFilter*)base);
70 *ppEnum = &pEnumPins->IEnumPins_iface;
71 pEnumPins->Version = receive_version(base);
73 TRACE("Created new enumerator (%p)\n", *ppEnum);
77 static HRESULT WINAPI IEnumPinsImpl_QueryInterface(IEnumPins * iface, REFIID riid, LPVOID * ppv)
79 TRACE("(%s, %p)\n", debugstr_guid(riid), ppv);
83 if (IsEqualIID(riid, &IID_IUnknown))
85 else if (IsEqualIID(riid, &IID_IEnumPins))
90 IUnknown_AddRef((IUnknown *)(*ppv));
94 FIXME("No interface for %s!\n", debugstr_guid(riid));
99 static ULONG WINAPI IEnumPinsImpl_AddRef(IEnumPins * iface)
101 IEnumPinsImpl *This = impl_from_IEnumPins(iface);
102 ULONG refCount = InterlockedIncrement(&This->refCount);
104 TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
109 static ULONG WINAPI IEnumPinsImpl_Release(IEnumPins * iface)
111 IEnumPinsImpl *This = impl_from_IEnumPins(iface);
112 ULONG refCount = InterlockedDecrement(&This->refCount);
114 TRACE("(%p)->() Release from %d\n", This, refCount + 1);
118 IBaseFilter_Release((IBaseFilter*)This->base);
126 static HRESULT WINAPI IEnumPinsImpl_Next(IEnumPins * iface, ULONG cPins, IPin ** ppPins, ULONG * pcFetched)
128 IEnumPinsImpl *This = impl_from_IEnumPins(iface);
132 TRACE("(%u, %p, %p)\n", cPins, ppPins, pcFetched);
137 if (cPins > 1 && !pcFetched)
143 if (This->Version != This->receive_version(This->base))
144 return VFW_E_ENUM_OUT_OF_SYNC;
146 while (i < cPins && hr == S_OK)
149 pin = This->receive_pin(This->base, This->uIndex + i);
167 static HRESULT WINAPI IEnumPinsImpl_Skip(IEnumPins * iface, ULONG cPins)
169 IEnumPinsImpl *This = impl_from_IEnumPins(iface);
171 TRACE("(%u)\n", cPins);
173 if (This->Version != This->receive_version(This->base))
174 return VFW_E_ENUM_OUT_OF_SYNC;
176 if (This->receive_pincount(This->base) >= This->uIndex + cPins)
179 This->uIndex += cPins;
183 static HRESULT WINAPI IEnumPinsImpl_Reset(IEnumPins * iface)
185 IEnumPinsImpl *This = impl_from_IEnumPins(iface);
187 TRACE("IEnumPinsImpl::Reset()\n");
188 This->Version = This->receive_version(This->base);
194 static HRESULT WINAPI IEnumPinsImpl_Clone(IEnumPins * iface, IEnumPins ** ppEnum)
197 IEnumPinsImpl *This = impl_from_IEnumPins(iface);
199 TRACE("(%p)\n", ppEnum);
201 hr = EnumPins_Construct(This->base, This->receive_pin, This->receive_pincount, This->receive_version, ppEnum);
204 return IEnumPins_Skip(*ppEnum, This->uIndex);
207 static const IEnumPinsVtbl IEnumPinsImpl_Vtbl =
209 IEnumPinsImpl_QueryInterface,
210 IEnumPinsImpl_AddRef,
211 IEnumPinsImpl_Release,