dlls/strmbase/filter.c

   1 /*
   2  * Generic Implementation of IBaseFilter Interface
   3  *
   4  * Copyright 2010 Aric Stewart, CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define COBJMACROS
  22
  23 #include "dshow.h"
  24 #include "wine/debug.h"
  25 #include "wine/unicode.h"
  26 #include "wine/strmbase.h"
  27 #include "uuids.h"
  28 #include <assert.h>
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
  31
  32 static inline BaseFilter *impl_from_IBaseFilter(IBaseFilter *iface)
  33 {
  34     return CONTAINING_RECORD(iface, BaseFilter, IBaseFilter_iface);
  35 }
  36
  37 HRESULT WINAPI BaseFilterImpl_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
  38 {
  39     TRACE("(%p)->(%s, %p)\n", iface, debugstr_guid(riid), ppv);
  40
  41     *ppv = NULL;
  42
  43     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IPersist) ||
  44         IsEqualIID(riid, &IID_IMediaFilter) || IsEqualIID(riid, &IID_IBaseFilter))
  45     {
  46         *ppv = iface;
  47         IBaseFilter_AddRef(iface);
  48         return S_OK;
  49     }
  50
  51     return E_NOINTERFACE;
  52 }
  53
  54 ULONG WINAPI BaseFilterImpl_AddRef(IBaseFilter * iface)
  55 {
  56     BaseFilter *This = impl_from_IBaseFilter(iface);
  57     ULONG refCount = InterlockedIncrement(&This->refCount);
  58
  59     TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
  60
  61     return refCount;
  62 }
  63
  64 ULONG WINAPI BaseFilterImpl_Release(IBaseFilter * iface)
  65 {
  66     BaseFilter *This = impl_from_IBaseFilter(iface);
  67     ULONG refCount = InterlockedDecrement(&This->refCount);
  68
  69     TRACE("(%p)->() Release from %d\n", This, refCount + 1);
  70
  71     if (!refCount)
  72         BaseFilter_Destroy(This);
  73
  74     return refCount;
  75 }
  76
  77 HRESULT WINAPI BaseFilterImpl_GetClassID(IBaseFilter * iface, CLSID * pClsid)
  78 {
  79     BaseFilter *This = impl_from_IBaseFilter(iface);
  80     TRACE("(%p)->(%p)\n", This, pClsid);
  81
  82     *pClsid = This->clsid;
  83
  84     return S_OK;
  85 }
  86
  87 HRESULT WINAPI BaseFilterImpl_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState )
  88 {
  89     BaseFilter *This = impl_from_IBaseFilter(iface);
  90     TRACE("(%p)->(%d, %p)\n", This, dwMilliSecsTimeout, pState);
  91
  92     EnterCriticalSection(&This->csFilter);
  93     {
  94         *pState = This->state;
  95     }
  96     LeaveCriticalSection(&This->csFilter);
  97
  98     return S_OK;
  99 }
 100
 101 HRESULT WINAPI BaseFilterImpl_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 102 {
 103     BaseFilter *This = impl_from_IBaseFilter(iface);
 104     TRACE("(%p)->(%p)\n", This, pClock);
 105
 106     EnterCriticalSection(&This->csFilter);
 107     {
 108         if (This->pClock)
 109             IReferenceClock_Release(This->pClock);
 110         This->pClock = pClock;
 111         if (This->pClock)
 112             IReferenceClock_AddRef(This->pClock);
 113     }
 114     LeaveCriticalSection(&This->csFilter);
 115
 116     return S_OK;
 117 }
 118
 119 HRESULT WINAPI BaseFilterImpl_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 120 {
 121     BaseFilter *This = impl_from_IBaseFilter(iface);
 122     TRACE("(%p)->(%p)\n", This, ppClock);
 123
 124     EnterCriticalSection(&This->csFilter);
 125     {
 126         *ppClock = This->pClock;
 127         if (This->pClock)
 128             IReferenceClock_AddRef(This->pClock);
 129     }
 130     LeaveCriticalSection(&This->csFilter);
 131
 132     return S_OK;
 133 }
 134
 135 HRESULT WINAPI BaseFilterImpl_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 136 {
 137     BaseFilter *This = impl_from_IBaseFilter(iface);
 138
 139     TRACE("(%p)->(%p)\n", iface, ppEnum);
 140
 141     return EnumPins_Construct(This, This->pFuncsTable->pfnGetPin, This->pFuncsTable->pfnGetPinCount, BaseFilterImpl_GetPinVersion, ppEnum);
 142 }
 143
 144
 145 HRESULT WINAPI BaseFilterImpl_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 146 {
 147     BaseFilter *This = impl_from_IBaseFilter(iface);
 148     TRACE("(%p)->(%p)\n", This, pInfo);
 149
 150     strcpyW(pInfo->achName, This->filterInfo.achName);
 151     pInfo->pGraph = This->filterInfo.pGraph;
 152
 153     if (pInfo->pGraph)
 154         IFilterGraph_AddRef(pInfo->pGraph);
 155
 156     return S_OK;
 157 }
 158
 159 HRESULT WINAPI BaseFilterImpl_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName )
 160 {
 161     BaseFilter *This = impl_from_IBaseFilter(iface);
 162
 163     TRACE("(%p)->(%p, %s)\n", This, pGraph, debugstr_w(pName));
 164
 165     EnterCriticalSection(&This->csFilter);
 166     {
 167         if (pName)
 168             strcpyW(This->filterInfo.achName, pName);
 169         else
 170             *This->filterInfo.achName = '\0';
 171         This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 172     }
 173     LeaveCriticalSection(&This->csFilter);
 174
 175     return S_OK;
 176 }
 177
 178 HRESULT WINAPI BaseFilterImpl_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 179 {
 180     TRACE("(%p)->(%p)\n", iface, pVendorInfo);
 181     return E_NOTIMPL;
 182 }
 183
 184 LONG WINAPI BaseFilterImpl_GetPinVersion(BaseFilter * This)
 185 {
 186     TRACE("(%p)\n", This);
 187     return This->pinVersion;
 188 }
 189
 190 VOID WINAPI BaseFilterImpl_IncrementPinVersion(BaseFilter * This)
 191 {
 192     InterlockedIncrement(&This->pinVersion);
 193     TRACE("(%p) -> New pinVersion %i\n", This,This->pinVersion);
 194 }
 195
 196 HRESULT WINAPI BaseFilter_Init(BaseFilter * This, const IBaseFilterVtbl *Vtbl, const CLSID *pClsid, DWORD_PTR DebugInfo, const BaseFilterFuncTable* pBaseFuncsTable)
 197 {
 198     This->IBaseFilter_iface.lpVtbl = Vtbl;
 199     This->refCount = 1;
 200     InitializeCriticalSection(&This->csFilter);
 201     This->state = State_Stopped;
 202     This->rtStreamStart = 0;
 203     This->pClock = NULL;
 204     ZeroMemory(&This->filterInfo, sizeof(FILTER_INFO));
 205     This->clsid = *pClsid;
 206     This->csFilter.DebugInfo->Spare[0] = DebugInfo;
 207     This->pinVersion = 1;
 208
 209     This->pFuncsTable = pBaseFuncsTable;
 210
 211     return S_OK;
 212 }
 213
 214 HRESULT WINAPI BaseFilter_Destroy(BaseFilter * This)
 215 {
 216     if (This->pClock)
 217         IReferenceClock_Release(This->pClock);
 218
 219     This->IBaseFilter_iface.lpVtbl = NULL;
 220     This->csFilter.DebugInfo->Spare[0] = 0;
 221     DeleteCriticalSection(&This->csFilter);
 222
 223     return S_OK;
 224 }