dlls/qcap/enummedia.c

   1 /*
   2  * Implementation of IEnumMediaTypes Interface
   3  *
   4  * Copyright 2003 Robert Shearman
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wtypes.h"
  28 #include "wingdi.h"
  29 #include "winuser.h"
  30 #include "dshow.h"
  31
  32 #include "qcap_main.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(qcap);
  37
  38 HRESULT CopyMediaType(AM_MEDIA_TYPE * pDest, const AM_MEDIA_TYPE *pSrc)
  39 {
  40     memcpy(pDest, pSrc, sizeof(AM_MEDIA_TYPE));
  41     if (!pSrc->pbFormat) return S_OK;
  42     if (!(pDest->pbFormat = CoTaskMemAlloc(pSrc->cbFormat)))
  43         return E_OUTOFMEMORY;
  44     memcpy(pDest->pbFormat, pSrc->pbFormat, pSrc->cbFormat);
  45     return S_OK;
  46 }
  47
  48 void FreeMediaType(AM_MEDIA_TYPE * pMediaType)
  49 {
  50     if (pMediaType->pbFormat)
  51     {
  52         CoTaskMemFree(pMediaType->pbFormat);
  53         pMediaType->pbFormat = NULL;
  54     }
  55     if (pMediaType->pUnk)
  56     {
  57         IUnknown_Release(pMediaType->pUnk);
  58         pMediaType->pUnk = NULL;
  59     }
  60 }
  61
  62 void DeleteMediaType(AM_MEDIA_TYPE * pMediaType)
  63 {
  64    FreeMediaType(pMediaType);
  65    CoTaskMemFree(pMediaType);
  66 }
  67
  68 BOOL CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE * pmt2,
  69                        BOOL bWildcards)
  70 {
  71     TRACE("pmt1: ");
  72     dump_AM_MEDIA_TYPE(pmt1);
  73     TRACE("pmt2: ");
  74     dump_AM_MEDIA_TYPE(pmt2);
  75     return (((bWildcards && (IsEqualGUID(&pmt1->majortype, &GUID_NULL) ||
  76               IsEqualGUID(&pmt2->majortype, &GUID_NULL))) ||
  77               IsEqualGUID(&pmt1->majortype, &pmt2->majortype)) &&
  78               ((bWildcards && (IsEqualGUID(&pmt1->subtype, &GUID_NULL) ||
  79               IsEqualGUID(&pmt2->subtype, &GUID_NULL))) ||
  80               IsEqualGUID(&pmt1->subtype, &pmt2->subtype)));
  81 }
  82
  83 void dump_AM_MEDIA_TYPE(const AM_MEDIA_TYPE * pmt)
  84 {
  85     if (!pmt)
  86         return;
  87     TRACE("\t%s\n\t%s\n\t...\n\t%s\n", debugstr_guid(&pmt->majortype),
  88           debugstr_guid(&pmt->subtype), debugstr_guid(&pmt->formattype));
  89 }
  90
  91 typedef struct IEnumMediaTypesImpl
  92 {
  93     const IEnumMediaTypesVtbl * lpVtbl;
  94     LONG refCount;
  95     ENUMMEDIADETAILS enumMediaDetails;
  96     ULONG uIndex;
  97 } IEnumMediaTypesImpl;
  98
  99 static const struct IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl;
 100
 101 HRESULT IEnumMediaTypesImpl_Construct(const ENUMMEDIADETAILS * pDetails,
 102                                       IEnumMediaTypes ** ppEnum)
 103 {
 104     ULONG i;
 105     IEnumMediaTypesImpl * pEnumMediaTypes = CoTaskMemAlloc(sizeof(IEnumMediaTypesImpl));
 106
 107     if (!pEnumMediaTypes)
 108     {
 109         *ppEnum = NULL;
 110         return E_OUTOFMEMORY;
 111     }
 112     ObjectRefCount(TRUE);
 113     pEnumMediaTypes->lpVtbl = &IEnumMediaTypesImpl_Vtbl;
 114     pEnumMediaTypes->refCount = 1;
 115     pEnumMediaTypes->uIndex = 0;
 116     pEnumMediaTypes->enumMediaDetails.cMediaTypes = pDetails->cMediaTypes;
 117     pEnumMediaTypes->enumMediaDetails.pMediaTypes =
 118                       CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE) * pDetails->cMediaTypes);
 119     for (i = 0; i < pDetails->cMediaTypes; i++)
 120         if (FAILED(CopyMediaType(&pEnumMediaTypes->enumMediaDetails.pMediaTypes[i], &pDetails->pMediaTypes[i]))) {
 121            while (i--) CoTaskMemFree(pEnumMediaTypes->enumMediaDetails.pMediaTypes[i].pbFormat);
 122            CoTaskMemFree(pEnumMediaTypes->enumMediaDetails.pMediaTypes);
 123            return E_OUTOFMEMORY;
 124         }
 125     *ppEnum = (IEnumMediaTypes *)(&pEnumMediaTypes->lpVtbl);
 126     return S_OK;
 127 }
 128
 129 static HRESULT WINAPI IEnumMediaTypesImpl_QueryInterface(IEnumMediaTypes * iface,
 130                                                          REFIID riid,
 131                                                          LPVOID * ppv)
 132 {
 133     TRACE("(%s, %p)\n", debugstr_guid(riid), ppv);
 134
 135     *ppv = NULL;
 136
 137     if (IsEqualIID(riid, &IID_IUnknown))
 138         *ppv = (LPVOID)iface;
 139     else if (IsEqualIID(riid, &IID_IEnumMediaTypes))
 140         *ppv = (LPVOID)iface;
 141
 142     if (*ppv)
 143     {
 144         IUnknown_AddRef((IUnknown *)(*ppv));
 145         return S_OK;
 146     }
 147
 148     FIXME("No interface for %s!\n", debugstr_guid(riid));
 149
 150     return E_NOINTERFACE;
 151 }
 152
 153 static ULONG WINAPI IEnumMediaTypesImpl_AddRef(IEnumMediaTypes * iface)
 154 {
 155     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 156     ULONG refCount = InterlockedIncrement(&This->refCount);
 157
 158     TRACE("()\n");
 159
 160     return refCount;
 161 }
 162
 163 static ULONG WINAPI IEnumMediaTypesImpl_Release(IEnumMediaTypes * iface)
 164 {
 165     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 166     ULONG refCount = InterlockedDecrement(&This->refCount);
 167
 168     TRACE("()\n");
 169
 170     if (!refCount)
 171     {
 172         int i;
 173         for (i = 0; i < This->enumMediaDetails.cMediaTypes; i++)
 174            if (This->enumMediaDetails.pMediaTypes[i].pbFormat)
 175               CoTaskMemFree(This->enumMediaDetails.pMediaTypes[i].pbFormat);
 176         CoTaskMemFree(This->enumMediaDetails.pMediaTypes);
 177         CoTaskMemFree(This);
 178         ObjectRefCount(FALSE);
 179     }
 180     return refCount;
 181 }
 182
 183 static HRESULT WINAPI IEnumMediaTypesImpl_Next(IEnumMediaTypes * iface,
 184                                                ULONG cMediaTypes,
 185                                                AM_MEDIA_TYPE ** ppMediaTypes,
 186                                                ULONG * pcFetched)
 187 {
 188     ULONG cFetched;
 189     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 190
 191     cFetched = min(This->enumMediaDetails.cMediaTypes,
 192                    This->uIndex + cMediaTypes) - This->uIndex;
 193
 194     TRACE("(%lu, %p, %p)\n", cMediaTypes, ppMediaTypes, pcFetched);
 195     TRACE("Next uIndex: %lu, cFetched: %lu\n", This->uIndex, cFetched);
 196
 197     if (cFetched > 0)
 198     {
 199         ULONG i;
 200         *ppMediaTypes = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE) * cFetched);
 201         for (i = 0; i < cFetched; i++)
 202             if (FAILED(CopyMediaType(&(*ppMediaTypes)[i], &This->enumMediaDetails.pMediaTypes[This->uIndex + i]))) {
 203                 while (i--)
 204                     CoTaskMemFree((*ppMediaTypes)[i].pbFormat);
 205                 CoTaskMemFree(*ppMediaTypes);
 206                 *ppMediaTypes = NULL;
 207                 return E_OUTOFMEMORY;
 208             }
 209     }
 210
 211     if ((cMediaTypes != 1) || pcFetched)
 212         *pcFetched = cFetched;
 213
 214     This->uIndex += cFetched;
 215
 216     if (cFetched != cMediaTypes)
 217         return S_FALSE;
 218     return S_OK;
 219 }
 220
 221 static HRESULT WINAPI IEnumMediaTypesImpl_Skip(IEnumMediaTypes * iface,
 222                                                ULONG cMediaTypes)
 223 {
 224     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 225
 226     TRACE("(%lu)\n", cMediaTypes);
 227
 228     if (This->uIndex + cMediaTypes < This->enumMediaDetails.cMediaTypes)
 229     {
 230         This->uIndex += cMediaTypes;
 231         return S_OK;
 232     }
 233     return S_FALSE;
 234 }
 235
 236 static HRESULT WINAPI IEnumMediaTypesImpl_Reset(IEnumMediaTypes * iface)
 237 {
 238     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 239
 240     TRACE("()\n");
 241
 242     This->uIndex = 0;
 243     return S_OK;
 244 }
 245
 246 static HRESULT WINAPI IEnumMediaTypesImpl_Clone(IEnumMediaTypes * iface,
 247                                                 IEnumMediaTypes ** ppEnum)
 248 {
 249     HRESULT hr;
 250     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 251
 252     TRACE("(%p)\n", ppEnum);
 253
 254     hr = IEnumMediaTypesImpl_Construct(&This->enumMediaDetails, ppEnum);
 255     if (FAILED(hr))
 256         return hr;
 257     return IEnumMediaTypes_Skip(*ppEnum, This->uIndex);
 258 }
 259
 260 static const IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl =
 261 {
 262     IEnumMediaTypesImpl_QueryInterface,
 263     IEnumMediaTypesImpl_AddRef,
 264     IEnumMediaTypesImpl_Release,
 265     IEnumMediaTypesImpl_Next,
 266     IEnumMediaTypesImpl_Skip,
 267     IEnumMediaTypesImpl_Reset,
 268     IEnumMediaTypesImpl_Clone
 269 };