2 * Implementation of IEnumMediaTypes Interface
4 * Copyright 2003 Robert Shearman
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.
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.
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
32 #include "qcap_main.h"
34 #include "wine/debug.h"
36 WINE_DEFAULT_DEBUG_CHANNEL(qcap);
38 HRESULT CopyMediaType(AM_MEDIA_TYPE * pDest, const AM_MEDIA_TYPE *pSrc)
40 memcpy(pDest, pSrc, sizeof(AM_MEDIA_TYPE));
41 if (!pSrc->pbFormat) return S_OK;
42 if (!(pDest->pbFormat = CoTaskMemAlloc(pSrc->cbFormat)))
44 memcpy(pDest->pbFormat, pSrc->pbFormat, pSrc->cbFormat);
48 void FreeMediaType(AM_MEDIA_TYPE * pMediaType)
50 if (pMediaType->pbFormat)
52 CoTaskMemFree(pMediaType->pbFormat);
53 pMediaType->pbFormat = NULL;
57 IUnknown_Release(pMediaType->pUnk);
58 pMediaType->pUnk = NULL;
62 void DeleteMediaType(AM_MEDIA_TYPE * pMediaType)
64 FreeMediaType(pMediaType);
65 CoTaskMemFree(pMediaType);
68 BOOL CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE * pmt2,
72 dump_AM_MEDIA_TYPE(pmt1);
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)));
83 void dump_AM_MEDIA_TYPE(const AM_MEDIA_TYPE * pmt)
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));
91 typedef struct IEnumMediaTypesImpl
93 const IEnumMediaTypesVtbl * lpVtbl;
95 ENUMMEDIADETAILS enumMediaDetails;
97 } IEnumMediaTypesImpl;
99 static const struct IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl;
101 HRESULT IEnumMediaTypesImpl_Construct(const ENUMMEDIADETAILS * pDetails,
102 IEnumMediaTypes ** ppEnum)
105 IEnumMediaTypesImpl * pEnumMediaTypes = CoTaskMemAlloc(sizeof(IEnumMediaTypesImpl));
107 if (!pEnumMediaTypes)
110 return E_OUTOFMEMORY;
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;
125 *ppEnum = (IEnumMediaTypes *)(&pEnumMediaTypes->lpVtbl);
129 static HRESULT WINAPI IEnumMediaTypesImpl_QueryInterface(IEnumMediaTypes * iface,
133 TRACE("(%s, %p)\n", debugstr_guid(riid), ppv);
137 if (IsEqualIID(riid, &IID_IUnknown))
138 *ppv = (LPVOID)iface;
139 else if (IsEqualIID(riid, &IID_IEnumMediaTypes))
140 *ppv = (LPVOID)iface;
144 IUnknown_AddRef((IUnknown *)(*ppv));
148 FIXME("No interface for %s!\n", debugstr_guid(riid));
150 return E_NOINTERFACE;
153 static ULONG WINAPI IEnumMediaTypesImpl_AddRef(IEnumMediaTypes * iface)
155 IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
156 ULONG refCount = InterlockedIncrement(&This->refCount);
163 static ULONG WINAPI IEnumMediaTypesImpl_Release(IEnumMediaTypes * iface)
165 IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
166 ULONG refCount = InterlockedDecrement(&This->refCount);
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);
178 ObjectRefCount(FALSE);
183 static HRESULT WINAPI IEnumMediaTypesImpl_Next(IEnumMediaTypes * iface,
185 AM_MEDIA_TYPE ** ppMediaTypes,
189 IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
191 cFetched = min(This->enumMediaDetails.cMediaTypes,
192 This->uIndex + cMediaTypes) - This->uIndex;
194 TRACE("(%lu, %p, %p)\n", cMediaTypes, ppMediaTypes, pcFetched);
195 TRACE("Next uIndex: %lu, cFetched: %lu\n", This->uIndex, cFetched);
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]))) {
204 CoTaskMemFree((*ppMediaTypes)[i].pbFormat);
205 CoTaskMemFree(*ppMediaTypes);
206 *ppMediaTypes = NULL;
207 return E_OUTOFMEMORY;
211 if ((cMediaTypes != 1) || pcFetched)
212 *pcFetched = cFetched;
214 This->uIndex += cFetched;
216 if (cFetched != cMediaTypes)
221 static HRESULT WINAPI IEnumMediaTypesImpl_Skip(IEnumMediaTypes * iface,
224 IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
226 TRACE("(%lu)\n", cMediaTypes);
228 if (This->uIndex + cMediaTypes < This->enumMediaDetails.cMediaTypes)
230 This->uIndex += cMediaTypes;
236 static HRESULT WINAPI IEnumMediaTypesImpl_Reset(IEnumMediaTypes * iface)
238 IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
246 static HRESULT WINAPI IEnumMediaTypesImpl_Clone(IEnumMediaTypes * iface,
247 IEnumMediaTypes ** ppEnum)
250 IEnumMediaTypesImpl *This = (IEnumMediaTypesImpl *)iface;
252 TRACE("(%p)\n", ppEnum);
254 hr = IEnumMediaTypesImpl_Construct(&This->enumMediaDetails, ppEnum);
257 return IEnumMediaTypes_Skip(*ppEnum, This->uIndex);
260 static const IEnumMediaTypesVtbl IEnumMediaTypesImpl_Vtbl =
262 IEnumMediaTypesImpl_QueryInterface,
263 IEnumMediaTypesImpl_AddRef,
264 IEnumMediaTypesImpl_Release,
265 IEnumMediaTypesImpl_Next,
266 IEnumMediaTypesImpl_Skip,
267 IEnumMediaTypesImpl_Reset,
268 IEnumMediaTypesImpl_Clone