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