dlls/strmbase/mediatype.c

   1 /*
   2  * Implementation of MedaType utility functions
   3  *
   4  * Copyright 2003 Robert Shearman
   5  * Copyright 2010 Aric Stewart, CodeWeavers
   6  *
   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.
  11  *
  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.
  16  *
  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
  20  */
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24 #include "dshow.h"
  25
  26 #include "wine/strmbase.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
  30
  31 HRESULT WINAPI CopyMediaType(AM_MEDIA_TYPE * pDest, const AM_MEDIA_TYPE *pSrc)
  32 {
  33     *pDest = *pSrc;
  34     if (!pSrc->pbFormat) return S_OK;
  35     if (!(pDest->pbFormat = CoTaskMemAlloc(pSrc->cbFormat)))
  36         return E_OUTOFMEMORY;
  37     memcpy(pDest->pbFormat, pSrc->pbFormat, pSrc->cbFormat);
  38     if (pDest->pUnk)
  39         IUnknown_AddRef(pDest->pUnk);
  40     return S_OK;
  41 }
  42
  43 void WINAPI FreeMediaType(AM_MEDIA_TYPE * pMediaType)
  44 {
  45     if (pMediaType->pbFormat)
  46     {
  47         CoTaskMemFree(pMediaType->pbFormat);
  48         pMediaType->pbFormat = NULL;
  49     }
  50     if (pMediaType->pUnk)
  51     {
  52         IUnknown_Release(pMediaType->pUnk);
  53         pMediaType->pUnk = NULL;
  54     }
  55 }
  56
  57 AM_MEDIA_TYPE * WINAPI CreateMediaType(AM_MEDIA_TYPE const * pSrc)
  58 {
  59     AM_MEDIA_TYPE * pDest;
  60
  61     pDest = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
  62     if (!pDest)
  63         return NULL;
  64
  65     if (FAILED(CopyMediaType(pDest, pSrc)))
  66     {
  67         CoTaskMemFree(pDest);
  68         return NULL;
  69     }
  70
  71     return pDest;
  72 }
  73
  74 void WINAPI DeleteMediaType(AM_MEDIA_TYPE * pMediaType)
  75 {
  76     FreeMediaType(pMediaType);
  77     CoTaskMemFree(pMediaType);
  78 }
  79
  80 typedef struct tagENUMEDIADETAILS
  81 {
  82     ULONG cMediaTypes;
  83     AM_MEDIA_TYPE * pMediaTypes;
  84 } ENUMMEDIADETAILS;
  85
  86 typedef struct IEnumMediaTypesImpl
  87 {
  88     IEnumMediaTypes IEnumMediaTypes_iface;
  89     LONG refCount;
  90     BasePin *basePin;
  91     BasePin_GetMediaType enumMediaFunction;
  92     BasePin_GetMediaTypeVersion mediaVersionFunction;
  93     LONG currentVersion;
  94     ENUMMEDIADETAILS enumMediaDetails;
  95     ULONG uIndex;
  96 } IEnumMediaTypesImpl;
  97
  98 static inline IEnumMediaTypesImpl *impl_from_IEnumMediaTypes(IEnumMediaTypes *iface)
  99 {
 100     return CONTAINING_RECORD(iface, IEnumMediaTypesImpl, IEnumMediaTypes_iface);
 101 }
 102
 103 static const struct IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl;
 104
 105 HRESULT WINAPI EnumMediaTypes_Construct(BasePin *basePin, BasePin_GetMediaType enumFunc, BasePin_GetMediaTypeVersion versionFunc, IEnumMediaTypes ** ppEnum)
 106 {
 107     ULONG i;
 108     IEnumMediaTypesImpl * pEnumMediaTypes = CoTaskMemAlloc(sizeof(IEnumMediaTypesImpl));
 109     AM_MEDIA_TYPE amt;
 110
 111     if (!pEnumMediaTypes)
 112     {
 113         *ppEnum = NULL;
 114         return E_OUTOFMEMORY;
 115     }
 116     pEnumMediaTypes->IEnumMediaTypes_iface.lpVtbl = &IEnumMediaTypesImpl_Vtbl;
 117     pEnumMediaTypes->refCount = 1;
 118     pEnumMediaTypes->uIndex = 0;
 119     pEnumMediaTypes->enumMediaFunction = enumFunc;
 120     pEnumMediaTypes->mediaVersionFunction = versionFunc;
 121     IPin_AddRef(&basePin->IPin_iface);
 122     pEnumMediaTypes->basePin = basePin;
 123
 124     i = 0;
 125     while (enumFunc(basePin,i,&amt) == S_OK) i++;
 126
 127     pEnumMediaTypes->enumMediaDetails.cMediaTypes = i;
 128     pEnumMediaTypes->enumMediaDetails.pMediaTypes = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE) * i);
 129     for (i = 0; i < pEnumMediaTypes->enumMediaDetails.cMediaTypes; i++)
 130     {
 131         enumFunc(basePin,i,&amt);
 132         if (FAILED(CopyMediaType(&pEnumMediaTypes->enumMediaDetails.pMediaTypes[i], &amt)))
 133         {
 134            while (i--)
 135               CoTaskMemFree(pEnumMediaTypes->enumMediaDetails.pMediaTypes[i].pbFormat);
 136            CoTaskMemFree(pEnumMediaTypes->enumMediaDetails.pMediaTypes);
 137            return E_OUTOFMEMORY;
 138         }
 139     }
 140     *ppEnum = &pEnumMediaTypes->IEnumMediaTypes_iface;
 141     pEnumMediaTypes->currentVersion = versionFunc(basePin);
 142     return S_OK;
 143 }
 144
 145 static HRESULT WINAPI IEnumMediaTypesImpl_QueryInterface(IEnumMediaTypes * iface, REFIID riid, LPVOID * ppv)
 146 {
 147     TRACE("(%s, %p)\n", debugstr_guid(riid), ppv);
 148
 149     *ppv = NULL;
 150
 151     if (IsEqualIID(riid, &IID_IUnknown))
 152         *ppv = iface;
 153     else if (IsEqualIID(riid, &IID_IEnumMediaTypes))
 154         *ppv = iface;
 155
 156     if (*ppv)
 157     {
 158         IUnknown_AddRef((IUnknown *)(*ppv));
 159         return S_OK;
 160     }
 161
 162     FIXME("No interface for %s!\n", debugstr_guid(riid));
 163
 164     return E_NOINTERFACE;
 165 }
 166
 167 static ULONG WINAPI IEnumMediaTypesImpl_AddRef(IEnumMediaTypes * iface)
 168 {
 169     IEnumMediaTypesImpl *This = impl_from_IEnumMediaTypes(iface);
 170     ULONG refCount = InterlockedIncrement(&This->refCount);
 171
 172     TRACE("(%p)->() AddRef from %d\n", iface, refCount - 1);
 173
 174     return refCount;
 175 }
 176
 177 static ULONG WINAPI IEnumMediaTypesImpl_Release(IEnumMediaTypes * iface)
 178 {
 179     IEnumMediaTypesImpl *This = impl_from_IEnumMediaTypes(iface);
 180     ULONG refCount = InterlockedDecrement(&This->refCount);
 181
 182     TRACE("(%p)->() Release from %d\n", iface, refCount + 1);
 183
 184     if (!refCount)
 185     {
 186         ULONG i;
 187         for (i = 0; i < This->enumMediaDetails.cMediaTypes; i++)
 188             if (This->enumMediaDetails.pMediaTypes[i].pbFormat)
 189                 CoTaskMemFree(This->enumMediaDetails.pMediaTypes[i].pbFormat);
 190         CoTaskMemFree(This->enumMediaDetails.pMediaTypes);
 191         IPin_Release(&This->basePin->IPin_iface);
 192         CoTaskMemFree(This);
 193     }
 194     return refCount;
 195 }
 196
 197 static HRESULT WINAPI IEnumMediaTypesImpl_Next(IEnumMediaTypes * iface, ULONG cMediaTypes, AM_MEDIA_TYPE ** ppMediaTypes, ULONG * pcFetched)
 198 {
 199     ULONG cFetched;
 200     IEnumMediaTypesImpl *This = impl_from_IEnumMediaTypes(iface);
 201
 202     cFetched = min(This->enumMediaDetails.cMediaTypes, This->uIndex + cMediaTypes) - This->uIndex;
 203
 204     if (This->currentVersion != This->mediaVersionFunction(This->basePin))
 205         return VFW_E_ENUM_OUT_OF_SYNC;
 206
 207     TRACE("(%u, %p, %p)\n", cMediaTypes, ppMediaTypes, pcFetched);
 208     TRACE("Next uIndex: %u, cFetched: %u\n", This->uIndex, cFetched);
 209
 210     if (cFetched > 0)
 211     {
 212         ULONG i;
 213         for (i = 0; i < cFetched; i++)
 214             if (!(ppMediaTypes[i] = CreateMediaType(&This->enumMediaDetails.pMediaTypes[This->uIndex + i])))
 215             {
 216                 while (i--)
 217                     DeleteMediaType(ppMediaTypes[i]);
 218                 *pcFetched = 0;
 219                 return E_OUTOFMEMORY;
 220             }
 221     }
 222
 223     if ((cMediaTypes != 1) || pcFetched)
 224         *pcFetched = cFetched;
 225
 226     This->uIndex += cFetched;
 227
 228     if (cFetched != cMediaTypes)
 229         return S_FALSE;
 230     return S_OK;
 231 }
 232
 233 static HRESULT WINAPI IEnumMediaTypesImpl_Skip(IEnumMediaTypes * iface, ULONG cMediaTypes)
 234 {
 235     IEnumMediaTypesImpl *This = impl_from_IEnumMediaTypes(iface);
 236
 237     TRACE("(%u)\n", cMediaTypes);
 238     if (This->currentVersion != This->mediaVersionFunction(This->basePin))
 239         return VFW_E_ENUM_OUT_OF_SYNC;
 240
 241     if (This->uIndex + cMediaTypes < This->enumMediaDetails.cMediaTypes)
 242     {
 243         This->uIndex += cMediaTypes;
 244         return S_OK;
 245     }
 246     return S_FALSE;
 247 }
 248
 249 static HRESULT WINAPI IEnumMediaTypesImpl_Reset(IEnumMediaTypes * iface)
 250 {
 251     ULONG i;
 252     AM_MEDIA_TYPE amt;
 253     IEnumMediaTypesImpl *This = impl_from_IEnumMediaTypes(iface);
 254
 255     TRACE("()\n");
 256
 257     for (i = 0; i < This->enumMediaDetails.cMediaTypes; i++)
 258         if (This->enumMediaDetails.pMediaTypes[i].pbFormat)
 259             CoTaskMemFree(This->enumMediaDetails.pMediaTypes[i].pbFormat);
 260     CoTaskMemFree(This->enumMediaDetails.pMediaTypes);
 261
 262     i = 0;
 263     while (This->enumMediaFunction(This->basePin, i,&amt) == S_OK) i++;
 264
 265     This->enumMediaDetails.cMediaTypes = i;
 266     This->enumMediaDetails.pMediaTypes = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE) * i);
 267     for (i = 0; i < This->enumMediaDetails.cMediaTypes; i++)
 268     {
 269         This->enumMediaFunction(This->basePin, i,&amt);
 270         if (FAILED(CopyMediaType(&This->enumMediaDetails.pMediaTypes[i], &amt)))
 271         {
 272            while (i--)
 273               CoTaskMemFree(This->enumMediaDetails.pMediaTypes[i].pbFormat);
 274            CoTaskMemFree(This->enumMediaDetails.pMediaTypes);
 275            return E_OUTOFMEMORY;
 276         }
 277     }
 278
 279     This->currentVersion = This->mediaVersionFunction(This->basePin);
 280     This->uIndex = 0;
 281
 282     return S_OK;
 283 }
 284
 285 static HRESULT WINAPI IEnumMediaTypesImpl_Clone(IEnumMediaTypes * iface, IEnumMediaTypes ** ppEnum)
 286 {
 287     HRESULT hr;
 288     IEnumMediaTypesImpl *This = impl_from_IEnumMediaTypes(iface);
 289
 290     TRACE("(%p)\n", ppEnum);
 291
 292     hr = EnumMediaTypes_Construct(This->basePin, This->enumMediaFunction, This->mediaVersionFunction, ppEnum);
 293     if (FAILED(hr))
 294         return hr;
 295     return IEnumMediaTypes_Skip(*ppEnum, This->uIndex);
 296 }
 297
 298 static const IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl =
 299 {
 300     IEnumMediaTypesImpl_QueryInterface,
 301     IEnumMediaTypesImpl_AddRef,
 302     IEnumMediaTypesImpl_Release,
 303     IEnumMediaTypesImpl_Next,
 304     IEnumMediaTypesImpl_Skip,
 305     IEnumMediaTypesImpl_Reset,
 306     IEnumMediaTypesImpl_Clone
 307 };