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https://github.com/reactos/reactos.git
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216 lines
5.5 KiB
C
216 lines
5.5 KiB
C
/*
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* Implementation of IEnumPins Interface
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*
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* Copyright 2003 Robert Shearman
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* Copyright 2010 Aric Stewart, CodeWeavers
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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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#define COBJMACROS
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#include "dshow.h"
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#include "wine/strmbase.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
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typedef struct IEnumPinsImpl
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{
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IEnumPins IEnumPins_iface;
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LONG refCount;
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ULONG uIndex;
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BaseFilter *base;
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BaseFilter_GetPin receive_pin;
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BaseFilter_GetPinCount receive_pincount;
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BaseFilter_GetPinVersion receive_version;
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DWORD Version;
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} IEnumPinsImpl;
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static inline IEnumPinsImpl *impl_from_IEnumPins(IEnumPins *iface)
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{
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return CONTAINING_RECORD(iface, IEnumPinsImpl, IEnumPins_iface);
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}
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static const struct IEnumPinsVtbl IEnumPinsImpl_Vtbl;
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HRESULT WINAPI EnumPins_Construct(BaseFilter *base, BaseFilter_GetPin receive_pin, BaseFilter_GetPinCount receive_pincount, BaseFilter_GetPinVersion receive_version, IEnumPins ** ppEnum)
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{
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IEnumPinsImpl * pEnumPins;
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if (!ppEnum)
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return E_POINTER;
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pEnumPins = CoTaskMemAlloc(sizeof(IEnumPinsImpl));
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if (!pEnumPins)
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{
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*ppEnum = NULL;
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return E_OUTOFMEMORY;
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}
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pEnumPins->IEnumPins_iface.lpVtbl = &IEnumPinsImpl_Vtbl;
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pEnumPins->refCount = 1;
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pEnumPins->uIndex = 0;
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pEnumPins->receive_pin = receive_pin;
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pEnumPins->receive_pincount = receive_pincount;
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pEnumPins->receive_version = receive_version;
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pEnumPins->base = base;
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IBaseFilter_AddRef(&base->IBaseFilter_iface);
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*ppEnum = &pEnumPins->IEnumPins_iface;
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pEnumPins->Version = receive_version(base);
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TRACE("Created new enumerator (%p)\n", *ppEnum);
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return S_OK;
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}
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static HRESULT WINAPI IEnumPinsImpl_QueryInterface(IEnumPins * iface, REFIID riid, LPVOID * ppv)
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{
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TRACE("(%p)->(%s, %p)\n", iface, debugstr_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_IEnumPins))
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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", debugstr_guid(riid));
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return E_NOINTERFACE;
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}
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static ULONG WINAPI IEnumPinsImpl_AddRef(IEnumPins * iface)
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{
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IEnumPinsImpl *This = impl_from_IEnumPins(iface);
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ULONG ref = InterlockedIncrement(&This->refCount);
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TRACE("(%p)->(): new ref = %u\n", iface, ref);
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return ref;
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}
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static ULONG WINAPI IEnumPinsImpl_Release(IEnumPins * iface)
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{
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IEnumPinsImpl *This = impl_from_IEnumPins(iface);
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ULONG ref = InterlockedDecrement(&This->refCount);
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TRACE("(%p)->(): new ref = %u\n", iface, ref);
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if (!ref)
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{
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IBaseFilter_Release(&This->base->IBaseFilter_iface);
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CoTaskMemFree(This);
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}
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return ref;
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}
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static HRESULT WINAPI IEnumPinsImpl_Next(IEnumPins * iface, ULONG cPins, IPin ** ppPins, ULONG * pcFetched)
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{
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IEnumPinsImpl *This = impl_from_IEnumPins(iface);
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ULONG i = 0;
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TRACE("(%p)->(%u, %p, %p)\n", iface, cPins, ppPins, pcFetched);
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if (!ppPins)
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return E_POINTER;
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if (cPins > 1 && !pcFetched)
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return E_INVALIDARG;
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if (pcFetched)
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*pcFetched = 0;
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if (This->Version != This->receive_version(This->base))
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return VFW_E_ENUM_OUT_OF_SYNC;
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while (i < cPins)
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{
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IPin *pin;
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pin = This->receive_pin(This->base, This->uIndex + i);
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if (!pin)
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break;
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else
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ppPins[i] = pin;
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++i;
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}
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if (pcFetched)
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*pcFetched = i;
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This->uIndex += i;
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if (i < cPins)
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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 IEnumPinsImpl_Skip(IEnumPins * iface, ULONG cPins)
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{
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IEnumPinsImpl *This = impl_from_IEnumPins(iface);
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TRACE("(%p)->(%u)\n", iface, cPins);
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if (This->Version != This->receive_version(This->base))
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return VFW_E_ENUM_OUT_OF_SYNC;
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if (This->receive_pincount(This->base) >= This->uIndex + cPins)
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return S_FALSE;
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This->uIndex += cPins;
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return S_OK;
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}
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static HRESULT WINAPI IEnumPinsImpl_Reset(IEnumPins * iface)
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{
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IEnumPinsImpl *This = impl_from_IEnumPins(iface);
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TRACE("(%p)->()\n", iface);
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This->Version = This->receive_version(This->base);
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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 IEnumPinsImpl_Clone(IEnumPins * iface, IEnumPins ** ppEnum)
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{
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HRESULT hr;
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IEnumPinsImpl *This = impl_from_IEnumPins(iface);
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TRACE("(%p)->(%p)\n", iface, ppEnum);
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hr = EnumPins_Construct(This->base, This->receive_pin, This->receive_pincount, This->receive_version, ppEnum);
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if (FAILED(hr))
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return hr;
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return IEnumPins_Skip(*ppEnum, This->uIndex);
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}
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static const IEnumPinsVtbl IEnumPinsImpl_Vtbl =
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{
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IEnumPinsImpl_QueryInterface,
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IEnumPinsImpl_AddRef,
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IEnumPinsImpl_Release,
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IEnumPinsImpl_Next,
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IEnumPinsImpl_Skip,
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IEnumPinsImpl_Reset,
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IEnumPinsImpl_Clone
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};
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