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     {
  73         if (This->pClock)
  74             IReferenceClock_Release(This->pClock);
  75
  76         This->IBaseFilter_iface.lpVtbl = NULL;
  77         This->csFilter.DebugInfo->Spare[0] = 0;
  78         DeleteCriticalSection(&This->csFilter);
  79     }
  80
  81     return refCount;
  82 }
  83
  84 HRESULT WINAPI BaseFilterImpl_GetClassID(IBaseFilter * iface, CLSID * pClsid)
  85 {
  86     BaseFilter *This = impl_from_IBaseFilter(iface);
  87     TRACE("(%p)->(%p)\n", This, pClsid);
  88
  89     *pClsid = This->clsid;
  90
  91     return S_OK;
  92 }
  93
  94 HRESULT WINAPI BaseFilterImpl_GetState(IBaseFilter * iface, DWORD dwMilliSecsTimeout, FILTER_STATE *pState )
  95 {
  96     BaseFilter *This = impl_from_IBaseFilter(iface);
  97     TRACE("(%p)->(%d, %p)\n", This, dwMilliSecsTimeout, pState);
  98
  99     EnterCriticalSection(&This->csFilter);
 100     {
 101         *pState = This->state;
 102     }
 103     LeaveCriticalSection(&This->csFilter);
 104
 105     return S_OK;
 106 }
 107
 108 HRESULT WINAPI BaseFilterImpl_SetSyncSource(IBaseFilter * iface, IReferenceClock *pClock)
 109 {
 110     BaseFilter *This = impl_from_IBaseFilter(iface);
 111     TRACE("(%p)->(%p)\n", This, pClock);
 112
 113     EnterCriticalSection(&This->csFilter);
 114     {
 115         if (This->pClock)
 116             IReferenceClock_Release(This->pClock);
 117         This->pClock = pClock;
 118         if (This->pClock)
 119             IReferenceClock_AddRef(This->pClock);
 120     }
 121     LeaveCriticalSection(&This->csFilter);
 122
 123     return S_OK;
 124 }
 125
 126 HRESULT WINAPI BaseFilterImpl_GetSyncSource(IBaseFilter * iface, IReferenceClock **ppClock)
 127 {
 128     BaseFilter *This = impl_from_IBaseFilter(iface);
 129     TRACE("(%p)->(%p)\n", This, ppClock);
 130
 131     EnterCriticalSection(&This->csFilter);
 132     {
 133         *ppClock = This->pClock;
 134         if (This->pClock)
 135             IReferenceClock_AddRef(This->pClock);
 136     }
 137     LeaveCriticalSection(&This->csFilter);
 138
 139     return S_OK;
 140 }
 141
 142 HRESULT WINAPI BaseFilterImpl_EnumPins(IBaseFilter * iface, IEnumPins **ppEnum)
 143 {
 144     BaseFilter *This = impl_from_IBaseFilter(iface);
 145
 146     TRACE("(%p)->(%p)\n", iface, ppEnum);
 147
 148     return EnumPins_Construct(This, This->pFuncsTable->pfnGetPin, This->pFuncsTable->pfnGetPinCount, BaseFilterImpl_GetPinVersion, ppEnum);
 149 }
 150
 151
 152 HRESULT WINAPI BaseFilterImpl_QueryFilterInfo(IBaseFilter * iface, FILTER_INFO *pInfo)
 153 {
 154     BaseFilter *This = impl_from_IBaseFilter(iface);
 155     TRACE("(%p)->(%p)\n", This, pInfo);
 156
 157     strcpyW(pInfo->achName, This->filterInfo.achName);
 158     pInfo->pGraph = This->filterInfo.pGraph;
 159
 160     if (pInfo->pGraph)
 161         IFilterGraph_AddRef(pInfo->pGraph);
 162
 163     return S_OK;
 164 }
 165
 166 HRESULT WINAPI BaseFilterImpl_JoinFilterGraph(IBaseFilter * iface, IFilterGraph *pGraph, LPCWSTR pName )
 167 {
 168     HRESULT hr = S_OK;
 169     BaseFilter *This = impl_from_IBaseFilter(iface);
 170
 171     TRACE("(%p)->(%p, %s)\n", This, pGraph, debugstr_w(pName));
 172
 173     EnterCriticalSection(&This->csFilter);
 174     {
 175         if (pName)
 176             strcpyW(This->filterInfo.achName, pName);
 177         else
 178             *This->filterInfo.achName = '\0';
 179         This->filterInfo.pGraph = pGraph; /* NOTE: do NOT increase ref. count */
 180     }
 181     LeaveCriticalSection(&This->csFilter);
 182
 183     return hr;
 184 }
 185
 186 HRESULT WINAPI BaseFilterImpl_QueryVendorInfo(IBaseFilter * iface, LPWSTR *pVendorInfo)
 187 {
 188     TRACE("(%p)->(%p)\n", iface, pVendorInfo);
 189     return E_NOTIMPL;
 190 }
 191
 192 LONG WINAPI BaseFilterImpl_GetPinVersion(BaseFilter * This)
 193 {
 194     TRACE("(%p)\n", This);
 195     return This->pinVersion;
 196 }
 197
 198 VOID WINAPI BaseFilterImpl_IncrementPinVersion(BaseFilter * This)
 199 {
 200     InterlockedIncrement(&This->pinVersion);
 201     TRACE("(%p) -> New pinVersion %i\n", This,This->pinVersion);
 202 }
 203
 204 HRESULT WINAPI BaseFilter_Init(BaseFilter * This, const IBaseFilterVtbl *Vtbl, const CLSID *pClsid, DWORD_PTR DebugInfo, const BaseFilterFuncTable* pBaseFuncsTable)
 205 {
 206     This->IBaseFilter_iface.lpVtbl = Vtbl;
 207     This->refCount = 1;
 208     InitializeCriticalSection(&This->csFilter);
 209     This->state = State_Stopped;
 210     This->rtStreamStart = 0;
 211     This->pClock = NULL;
 212     ZeroMemory(&This->filterInfo, sizeof(FILTER_INFO));
 213     This->clsid = *pClsid;
 214     This->csFilter.DebugInfo->Spare[0] = DebugInfo;
 215     This->pinVersion = 1;
 216
 217     This->pFuncsTable = pBaseFuncsTable;
 218
 219     return S_OK;
 220 }