Sweden-Number/dlls/windowscodecs/metadataquery.c

151 lines
4.2 KiB
C

/*
* Copyright 2016 Andrew Eikum for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
typedef struct {
IWICMetadataQueryReader IWICMetadataQueryReader_iface;
LONG ref;
IWICMetadataBlockReader *block;
} QueryReader;
static inline QueryReader *impl_from_IWICMetadataQueryReader(IWICMetadataQueryReader *iface)
{
return CONTAINING_RECORD(iface, QueryReader, IWICMetadataQueryReader_iface);
}
static HRESULT WINAPI mqr_QueryInterface(IWICMetadataQueryReader *iface, REFIID riid,
void **ppvObject)
{
QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
TRACE("(%p,%s,%p)\n", This, debugstr_guid(riid), ppvObject);
if (IsEqualGUID(riid, &IID_IUnknown) ||
IsEqualGUID(riid, &IID_IWICMetadataQueryReader))
*ppvObject = &This->IWICMetadataQueryReader_iface;
else
*ppvObject = NULL;
if (*ppvObject)
{
IUnknown_AddRef((IUnknown*)*ppvObject);
return S_OK;
}
return E_NOINTERFACE;
}
static ULONG WINAPI mqr_AddRef(IWICMetadataQueryReader *iface)
{
QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", This, ref);
return ref;
}
static ULONG WINAPI mqr_Release(IWICMetadataQueryReader *iface)
{
QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", This, ref);
if (!ref)
{
IWICMetadataBlockReader_Release(This->block);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI mqr_GetContainerFormat(IWICMetadataQueryReader *iface,
GUID *pguidContainerFormat)
{
QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
FIXME("(%p,%p)\n", This, pguidContainerFormat);
return E_NOTIMPL;
}
static HRESULT WINAPI mqr_GetLocation(IWICMetadataQueryReader *iface,
UINT cchMaxLength, WCHAR *wzNamespace, UINT *pcchActualLength)
{
QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
FIXME("(%p,%u,%p,%p)\n", This, cchMaxLength, wzNamespace, pcchActualLength);
return E_NOTIMPL;
}
static HRESULT WINAPI mqr_GetMetadataByName(IWICMetadataQueryReader *iface,
LPCWSTR wzName, PROPVARIANT *pvarValue)
{
QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
FIXME("(%p,%s,%p)\n", This, wine_dbgstr_w(wzName), pvarValue);
return E_NOTIMPL;
}
static HRESULT WINAPI mqr_GetEnumerator(IWICMetadataQueryReader *iface,
IEnumString **ppIEnumString)
{
QueryReader *This = impl_from_IWICMetadataQueryReader(iface);
FIXME("(%p,%p)\n", This, ppIEnumString);
return E_NOTIMPL;
}
static IWICMetadataQueryReaderVtbl mqr_vtbl = {
mqr_QueryInterface,
mqr_AddRef,
mqr_Release,
mqr_GetContainerFormat,
mqr_GetLocation,
mqr_GetMetadataByName,
mqr_GetEnumerator
};
HRESULT MetadataQueryReader_CreateInstance(IWICMetadataBlockReader *mbr, IWICMetadataQueryReader **out)
{
QueryReader *obj;
obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*obj));
if (!obj)
return E_OUTOFMEMORY;
obj->IWICMetadataQueryReader_iface.lpVtbl = &mqr_vtbl;
obj->ref = 1;
IWICMetadataBlockReader_AddRef(mbr);
obj->block = mbr;
*out = &obj->IWICMetadataQueryReader_iface;
return S_OK;
}