filter.c

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/*
 * Generic Implementation of IBaseFilter Interface
 *
 * Copyright 2010 Aric Stewart, CodeWeavers
 *
 * 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
 */
 
#define COBJMACROS
 
#include "dshow.h"
#include "wine/debug.h"
#include "wine/unicode.h"
#include "wine/strmbase.h"
#include "uuids.h"
#include <assert.h>
 
WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
 
static inline BaseFilter *impl_from_IBaseFilter(IBaseFilter *iface)
{
    return CONTAINING_RECORD(iface, BaseFilter, IBaseFilter_iface);
}
 
HRESULT WINAPI BaseFilterImpl_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
{
    TRACE("(%p)->(%s, %p)\n", iface, debugstr_guid(riid), ppv);
 
    *ppv = NULL;
 
    if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IPersist) ||
        IsEqualIID(riid, &IID_IMediaFilter) || IsEqualIID(riid, &IID_IBaseFilter))
    {
        *ppv = iface;
        IBaseFilter_AddRef(iface);
        return S_OK;
    }
 
    return E_NOINTERFACE;
}
 
ULONG WINAPI BaseFilterImpl_AddRef(IBaseFilter * iface)
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
    ULONG refCount = InterlockedIncrement(&This->refCount);
 
    TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
 
    return refCount;
}
 
ULONG WINAPI BaseFilterImpl_Release(IBaseFilter * iface)
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
    ULONG refCount = InterlockedDecrement(&This->refCount);
 
    TRACE("(%p)->() Release from %d\n", This, refCount + 1);
 
    if (!refCount)
        BaseFilter_Destroy(This);
 
    return refCount;
}
 
HRESULT WINAPI BaseFilterImpl_GetClassID(IBaseFilter * iface, CLSID * pClsid)
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
    TRACE("(%p)->(%p)\n", This, pClsid);
 
    *pClsid = This->clsid;
 
    return S_OK;
}
 
HRESULT WINAPI BaseFilterImpl_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState )
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
    TRACE("(%p)->(%d, %p)\n", This, dwMilliSecsTimeout, pState);
 
    EnterCriticalSection(&This->csFilter);
    {
        *pState = This->state;
    }
    LeaveCriticalSection(&This->csFilter);
 
    return S_OK;
}
 
HRESULT WINAPI BaseFilterImpl_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
    TRACE("(%p)->(%p)\n", This, pClock);
 
    EnterCriticalSection(&This->csFilter);
    {
        if (This->pClock)
            IReferenceClock_Release(This->pClock);
        This->pClock = pClock;
        if (This->pClock)
            IReferenceClock_AddRef(This->pClock);
    }
    LeaveCriticalSection(&This->csFilter);
 
    return S_OK;
}
 
HRESULT WINAPI BaseFilterImpl_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
    TRACE("(%p)->(%p)\n", This, ppClock);
 
    EnterCriticalSection(&This->csFilter);
    {
        *ppClock = This->pClock;
        if (This->pClock)
            IReferenceClock_AddRef(This->pClock);
    }
    LeaveCriticalSection(&This->csFilter);
 
    return S_OK;
}
 
HRESULT WINAPI BaseFilterImpl_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
 
    TRACE("(%p)->(%p)\n", iface, ppEnum);
 
    return EnumPins_Construct(This, This->pFuncsTable->pfnGetPin, This->pFuncsTable->pfnGetPinCount, BaseFilterImpl_GetPinVersion, ppEnum);
}
 
 
HRESULT WINAPI BaseFilterImpl_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
    TRACE("(%p)->(%p)\n", This, pInfo);
 
    strcpyW(pInfo->achName, This->filterInfo.achName);
    pInfo->pGraph = This->filterInfo.pGraph;
 
    if (pInfo->pGraph)
        IFilterGraph_AddRef(pInfo->pGraph);
 
    return S_OK;
}
 
HRESULT WINAPI BaseFilterImpl_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName )
{
    BaseFilter *This = impl_from_IBaseFilter(iface);
 
    TRACE("(%p)->(%p, %s)\n", This, pGraph, debugstr_w(pName));
 
    EnterCriticalSection(&This->csFilter);
    {
        if (pName)
            strcpyW(This->filterInfo.achName, pName);
        else
            *This->filterInfo.achName = '\0';
        This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
    }
    LeaveCriticalSection(&This->csFilter);
 
    return S_OK;
}
 
HRESULT WINAPI BaseFilterImpl_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
{
    TRACE("(%p)->(%p)\n", iface, pVendorInfo);
    return E_NOTIMPL;
}
 
LONG WINAPI BaseFilterImpl_GetPinVersion(BaseFilter * This)
{
    TRACE("(%p)\n", This);
    return This->pinVersion;
}
 
VOID WINAPI BaseFilterImpl_IncrementPinVersion(BaseFilter * This)
{
    InterlockedIncrement(&This->pinVersion);
    TRACE("(%p) -> New pinVersion %i\n", This,This->pinVersion);
}
 
HRESULT WINAPI BaseFilter_Init(BaseFilter * This, const IBaseFilterVtbl *Vtbl, const CLSID *pClsid, DWORD_PTR DebugInfo, const BaseFilterFuncTable* pBaseFuncsTable)
{
    This->IBaseFilter_iface.lpVtbl = Vtbl;
    This->refCount = 1;
    InitializeCriticalSection(&This->csFilter);
    This->state = State_Stopped;
    This->rtStreamStart = 0;
    This->pClock = NULL;
    ZeroMemory(&This->filterInfo, sizeof(FILTER_INFO));
    This->clsid = *pClsid;
    This->csFilter.DebugInfo->Spare[0] = DebugInfo;
    This->pinVersion = 1;
 
    This->pFuncsTable = pBaseFuncsTable;
 
    return S_OK;
}
 
HRESULT WINAPI BaseFilter_Destroy(BaseFilter * This)
{
    if (This->pClock)
        IReferenceClock_Release(This->pClock);
 
    This->IBaseFilter_iface.lpVtbl = NULL;
    This->csFilter.DebugInfo->Spare[0] = 0;
    DeleteCriticalSection(&This->csFilter);
 
    return S_OK;
}