dlls/windowscodecs/metadataquery.c

   1 /*
   2  * Copyright 2016 Andrew Eikum for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "objbase.h"
  28
  29 #include "wincodecs_private.h"
  30
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  34
  35 typedef struct {
  36     IWICMetadataQueryReader IWICMetadataQueryReader_iface;
  37
  38     LONG ref;
  39
  40     IWICMetadataBlockReader *block;
  41 } QueryReader;
  42
  43 static inline QueryReader *impl_from_IWICMetadataQueryReader(IWICMetadataQueryReader *iface)
  44 {
  45     return CONTAINING_RECORD(iface, QueryReader, IWICMetadataQueryReader_iface);
  46 }
  47
  48 static HRESULT WINAPI mqr_QueryInterface(IWICMetadataQueryReader *iface, REFIID riid,
  49         void **ppvObject)
  50 {
  51     QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
  52
  53     TRACE("(%p,%s,%p)\n", This, debugstr_guid(riid), ppvObject);
  54
  55     if (IsEqualGUID(riid, &IID_IUnknown) ||
  56             IsEqualGUID(riid, &IID_IWICMetadataQueryReader))
  57         *ppvObject = &This->IWICMetadataQueryReader_iface;
  58     else
  59         *ppvObject = NULL;
  60
  61     if (*ppvObject)
  62     {
  63         IUnknown_AddRef((IUnknown*)*ppvObject);
  64         return S_OK;
  65     }
  66
  67     return E_NOINTERFACE;
  68 }
  69
  70 static ULONG WINAPI mqr_AddRef(IWICMetadataQueryReader *iface)
  71 {
  72     QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
  73     ULONG ref = InterlockedIncrement(&This->ref);
  74     TRACE("(%p) refcount=%u\n", This, ref);
  75     return ref;
  76 }
  77
  78 static ULONG WINAPI mqr_Release(IWICMetadataQueryReader *iface)
  79 {
  80     QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
  81     ULONG ref = InterlockedDecrement(&This->ref);
  82     TRACE("(%p) refcount=%u\n", This, ref);
  83     if (!ref)
  84     {
  85         IWICMetadataBlockReader_Release(This->block);
  86         HeapFree(GetProcessHeap(), 0, This);
  87     }
  88     return ref;
  89 }
  90
  91 static HRESULT WINAPI mqr_GetContainerFormat(IWICMetadataQueryReader *iface,
  92         GUID *pguidContainerFormat)
  93 {
  94     QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
  95     FIXME("(%p,%p)\n", This, pguidContainerFormat);
  96     return E_NOTIMPL;
  97 }
  98
  99 static HRESULT WINAPI mqr_GetLocation(IWICMetadataQueryReader *iface,
 100         UINT cchMaxLength, WCHAR *wzNamespace, UINT *pcchActualLength)
 101 {
 102     QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
 103     FIXME("(%p,%u,%p,%p)\n", This, cchMaxLength, wzNamespace, pcchActualLength);
 104     return E_NOTIMPL;
 105 }
 106
 107 static HRESULT WINAPI mqr_GetMetadataByName(IWICMetadataQueryReader *iface,
 108         LPCWSTR wzName, PROPVARIANT *pvarValue)
 109 {
 110     QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
 111     FIXME("(%p,%s,%p)\n", This, wine_dbgstr_w(wzName), pvarValue);
 112     return E_NOTIMPL;
 113 }
 114
 115 static HRESULT WINAPI mqr_GetEnumerator(IWICMetadataQueryReader *iface,
 116         IEnumString **ppIEnumString)
 117 {
 118     QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
 119     FIXME("(%p,%p)\n", This, ppIEnumString);
 120     return E_NOTIMPL;
 121 }
 122
 123 static IWICMetadataQueryReaderVtbl mqr_vtbl = {
 124     mqr_QueryInterface,
 125     mqr_AddRef,
 126     mqr_Release,
 127     mqr_GetContainerFormat,
 128     mqr_GetLocation,
 129     mqr_GetMetadataByName,
 130     mqr_GetEnumerator
 131 };
 132
 133 HRESULT MetadataQueryReader_CreateInstance(IWICMetadataBlockReader *mbr, IWICMetadataQueryReader **out)
 134 {
 135     QueryReader *obj;
 136
 137     obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*obj));
 138     if (!obj)
 139         return E_OUTOFMEMORY;
 140
 141     obj->IWICMetadataQueryReader_iface.lpVtbl = &mqr_vtbl;
 142     obj->ref = 1;
 143
 144     IWICMetadataBlockReader_AddRef(mbr);
 145     obj->block = mbr;
 146
 147     *out = &obj->IWICMetadataQueryReader_iface;
 148
 149     return S_OK;
 150 }