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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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     CoTaskMemFree(pMediaType->pbFormat);
  51     pMediaType->pbFormat = NULL;
  52
  53     if (pMediaType->pUnk)
  54     {
  55         IUnknown_Release(pMediaType->pUnk);
  56         pMediaType->pUnk = NULL;
  57     }
  58 }
  59
  60 void DeleteMediaType(AM_MEDIA_TYPE * pMediaType)
  61 {
  62    FreeMediaType(pMediaType);
  63    CoTaskMemFree(pMediaType);
  64 }
  65
  66 BOOL CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE * pmt2,
  67                        BOOL bWildcards)
  68 {
  69     TRACE("pmt1: ");
  70     dump_AM_MEDIA_TYPE(pmt1);
  71     TRACE("pmt2: ");
  72     dump_AM_MEDIA_TYPE(pmt2);
  73     return (((bWildcards && (IsEqualGUID(&pmt1->majortype, &GUID_NULL) ||
  74               IsEqualGUID(&pmt2->majortype, &GUID_NULL))) ||
  75               IsEqualGUID(&pmt1->majortype, &pmt2->majortype)) &&
  76               ((bWildcards && (IsEqualGUID(&pmt1->subtype, &GUID_NULL) ||
  77               IsEqualGUID(&pmt2->subtype, &GUID_NULL))) ||
  78               IsEqualGUID(&pmt1->subtype, &pmt2->subtype)));
  79 }
  80
  81 void dump_AM_MEDIA_TYPE(const AM_MEDIA_TYPE * pmt)
  82 {
  83     if (!pmt)
  84         return;
  85     TRACE("\t%s\n\t%s\n\t...\n\t%s\n", debugstr_guid(&pmt->majortype),
  86           debugstr_guid(&pmt->subtype), debugstr_guid(&pmt->formattype));
  87 }
  88
  89 typedef struct IEnumMediaTypesImpl
  90 {
  91     const IEnumMediaTypesVtbl * lpVtbl;
  92     LONG refCount;
  93     ENUMMEDIADETAILS enumMediaDetails;
  94     ULONG uIndex;
  95 } IEnumMediaTypesImpl;
  96
  97 static const struct IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl;
  98
  99 HRESULT IEnumMediaTypesImpl_Construct(const ENUMMEDIADETAILS * pDetails,
 100                                       IEnumMediaTypes ** ppEnum)
 101 {
 102     ULONG i;
 103     IEnumMediaTypesImpl * pEnumMediaTypes = CoTaskMemAlloc(sizeof(IEnumMediaTypesImpl));
 104
 105     if (!pEnumMediaTypes)
 106     {
 107         *ppEnum = NULL;
 108         return E_OUTOFMEMORY;
 109     }
 110     ObjectRefCount(TRUE);
 111     pEnumMediaTypes->lpVtbl = &IEnumMediaTypesImpl_Vtbl;
 112     pEnumMediaTypes->refCount = 1;
 113     pEnumMediaTypes->uIndex = 0;
 114     pEnumMediaTypes->enumMediaDetails.cMediaTypes = pDetails->cMediaTypes;
 115     pEnumMediaTypes->enumMediaDetails.pMediaTypes =
 116                       CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE) * pDetails->cMediaTypes);
 117     for (i = 0; i < pDetails->cMediaTypes; i++)
 118         if (FAILED(CopyMediaType(&pEnumMediaTypes->enumMediaDetails.pMediaTypes[i], &pDetails->pMediaTypes[i]))) {
 119            while (i--) CoTaskMemFree(pEnumMediaTypes->enumMediaDetails.pMediaTypes[i].pbFormat);
 120            CoTaskMemFree(pEnumMediaTypes->enumMediaDetails.pMediaTypes);
 121            return E_OUTOFMEMORY;
 122         }
 123     *ppEnum = (IEnumMediaTypes *)(&pEnumMediaTypes->lpVtbl);
 124     return S_OK;
 125 }
 126
 127 static HRESULT WINAPI IEnumMediaTypesImpl_QueryInterface(IEnumMediaTypes * iface,
 128                                                          REFIID riid,
 129                                                          LPVOID * ppv)
 130 {
 131     TRACE("(%s, %p)\n", debugstr_guid(riid), ppv);
 132
 133     *ppv = NULL;
 134
 135     if (IsEqualIID(riid, &IID_IUnknown))
 136         *ppv = (LPVOID)iface;
 137     else if (IsEqualIID(riid, &IID_IEnumMediaTypes))
 138         *ppv = (LPVOID)iface;
 139
 140     if (*ppv)
 141     {
 142         IUnknown_AddRef((IUnknown *)(*ppv));
 143         return S_OK;
 144     }
 145
 146     FIXME("No interface for %s!\n", debugstr_guid(riid));
 147
 148     return E_NOINTERFACE;
 149 }
 150
 151 static ULONG WINAPI IEnumMediaTypesImpl_AddRef(IEnumMediaTypes * iface)
 152 {
 153     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 154     ULONG refCount = InterlockedIncrement(&This->refCount);
 155
 156     TRACE("()\n");
 157
 158     return refCount;
 159 }
 160
 161 static ULONG WINAPI IEnumMediaTypesImpl_Release(IEnumMediaTypes * iface)
 162 {
 163     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 164     ULONG refCount = InterlockedDecrement(&This->refCount);
 165
 166     TRACE("()\n");
 167
 168     if (!refCount)
 169     {
 170         int i;
 171         for (i = 0; i < This->enumMediaDetails.cMediaTypes; i++)
 172            if (This->enumMediaDetails.pMediaTypes[i].pbFormat)
 173               CoTaskMemFree(This->enumMediaDetails.pMediaTypes[i].pbFormat);
 174         CoTaskMemFree(This->enumMediaDetails.pMediaTypes);
 175         CoTaskMemFree(This);
 176         ObjectRefCount(FALSE);
 177     }
 178     return refCount;
 179 }
 180
 181 static HRESULT WINAPI IEnumMediaTypesImpl_Next(IEnumMediaTypes * iface,
 182                                                ULONG cMediaTypes,
 183                                                AM_MEDIA_TYPE ** ppMediaTypes,
 184                                                ULONG * pcFetched)
 185 {
 186     ULONG cFetched;
 187     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 188
 189     cFetched = min(This->enumMediaDetails.cMediaTypes,
 190                    This->uIndex + cMediaTypes) - This->uIndex;
 191
 192     TRACE("(%u, %p, %p)\n", cMediaTypes, ppMediaTypes, pcFetched);
 193     TRACE("Next uIndex: %u, cFetched: %u\n", This->uIndex, cFetched);
 194
 195     if (cFetched > 0)
 196     {
 197         ULONG i;
 198         *ppMediaTypes = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE) * cFetched);
 199         for (i = 0; i < cFetched; i++)
 200             if (FAILED(CopyMediaType(&(*ppMediaTypes)[i], &This->enumMediaDetails.pMediaTypes[This->uIndex + i]))) {
 201                 while (i--)
 202                     CoTaskMemFree((*ppMediaTypes)[i].pbFormat);
 203                 CoTaskMemFree(*ppMediaTypes);
 204                 *ppMediaTypes = NULL;
 205                 return E_OUTOFMEMORY;
 206             }
 207     }
 208
 209     if ((cMediaTypes != 1) || pcFetched)
 210         *pcFetched = cFetched;
 211
 212     This->uIndex += cFetched;
 213
 214     if (cFetched != cMediaTypes)
 215         return S_FALSE;
 216     return S_OK;
 217 }
 218
 219 static HRESULT WINAPI IEnumMediaTypesImpl_Skip(IEnumMediaTypes * iface,
 220                                                ULONG cMediaTypes)
 221 {
 222     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 223
 224     TRACE("(%u)\n", cMediaTypes);
 225
 226     if (This->uIndex + cMediaTypes < This->enumMediaDetails.cMediaTypes)
 227     {
 228         This->uIndex += cMediaTypes;
 229         return S_OK;
 230     }
 231     return S_FALSE;
 232 }
 233
 234 static HRESULT WINAPI IEnumMediaTypesImpl_Reset(IEnumMediaTypes * iface)
 235 {
 236     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 237
 238     TRACE("()\n");
 239
 240     This->uIndex = 0;
 241     return S_OK;
 242 }
 243
 244 static HRESULT WINAPI IEnumMediaTypesImpl_Clone(IEnumMediaTypes * iface,
 245                                                 IEnumMediaTypes ** ppEnum)
 246 {
 247     HRESULT hr;
 248     IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
 249
 250     TRACE("(%p)\n", ppEnum);
 251
 252     hr = IEnumMediaTypesImpl_Construct(&This->enumMediaDetails, ppEnum);
 253     if (FAILED(hr))
 254         return hr;
 255     return IEnumMediaTypes_Skip(*ppEnum, This->uIndex);
 256 }
 257
 258 static const IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl =
 259 {
 260     IEnumMediaTypesImpl_QueryInterface,
 261     IEnumMediaTypesImpl_AddRef,
 262     IEnumMediaTypesImpl_Release,
 263     IEnumMediaTypesImpl_Next,
 264     IEnumMediaTypesImpl_Skip,
 265     IEnumMediaTypesImpl_Reset,
 266     IEnumMediaTypesImpl_Clone
 267 };