mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-16 16:02:54 +02:00
188 lines
4.5 KiB
C++
188 lines
4.5 KiB
C++
/*****************************************************************************
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* utils.h: ActiveX control for VLC
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*****************************************************************************
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* Copyright (C) 2005 the VideoLAN team
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*
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* Authors: Damien Fouilleul <Damien.Fouilleul@laposte.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef __UTILS_H__
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#define __UTILS_H__
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#include <ole2.h>
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#include <vector>
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// utilities
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extern char *CStrFromBSTR(UINT codePage, BSTR bstr);
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extern BSTR BSTRFromCStr(UINT codePage, LPCSTR s);
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// properties
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extern HRESULT GetObjectProperty(LPUNKNOWN object, DISPID dispID, VARIANT& v);
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// properties
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extern HDC CreateDevDC(DVTARGETDEVICE *ptd);
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extern void DPFromHimetric(HDC hdc, LPPOINT pt, int count);
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extern void HimetricFromDP(HDC hdc, LPPOINT pt, int count);
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// enumeration
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template<class T> class VLCEnum : IUnknown
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{
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public:
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VLCEnum(REFIID riid, std::vector<T> &);
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VLCEnum(const VLCEnum<T> &);
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virtual ~VLCEnum() {};
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VLCEnum<T>& operator=(const VLCEnum<T> &t);
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// IUnknown methods
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STDMETHODIMP QueryInterface(REFIID riid, void **);
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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// IEnumXXXX methods
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STDMETHODIMP Next(ULONG, T *, ULONG *);
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STDMETHODIMP Skip(ULONG);
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STDMETHODIMP Reset(void);
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// cloning is implemented by subclasses and must use copy constructor
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//STDMETHODIMP Clone(VLCEnum<T> **);
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typedef void (*retainer)(T);
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void setRetainOperation(retainer retain) { _retain = retain; };
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private:
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LONG _refcount;
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std::vector<T> _v;
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typename std::vector<T>::iterator _i;
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REFIID _riid;
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retainer _retain;
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};
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template<class T>
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VLCEnum<T>::VLCEnum(REFIID riid, std::vector<T> &v) :
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_refcount(1),
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_v(v),
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_riid(riid),
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_retain(NULL)
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{
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_i= v.begin();
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};
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template<class T>
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VLCEnum<T>::VLCEnum(const VLCEnum<T> &e) :
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_refcount(1),
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_v(e._v),
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_riid(e._riid)
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{
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};
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template<class T>
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VLCEnum<T>& VLCEnum<T>::operator=(const VLCEnum<T> &e)
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{
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this->_refcount = 1;
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this->_riid = e._riid;
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this->_v = e._v;
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this->_i = e._i;
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return this;
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};
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template<class T>
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STDMETHODIMP VLCEnum<T>::QueryInterface(REFIID riid, void **ppv)
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{
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if( NULL == ppv ) return E_POINTER;
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if( (IID_IUnknown == riid)
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&& ( _riid == riid) ) {
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AddRef();
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*ppv = reinterpret_cast<LPVOID>(this);
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return NOERROR;
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}
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return E_NOINTERFACE;
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};
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template<class T>
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STDMETHODIMP_(ULONG) VLCEnum<T>::AddRef(void)
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{
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return InterlockedIncrement(&_refcount);
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};
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template<class T>
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STDMETHODIMP_(ULONG) VLCEnum<T>::Release(void)
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{
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ULONG refcount = InterlockedDecrement(&_refcount);
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if( 0 == refcount )
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{
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delete this;
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return 0;
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}
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return refcount;
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};
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template<class T>
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STDMETHODIMP VLCEnum<T>::Next(ULONG celt, T *rgelt, ULONG *pceltFetched)
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{
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if( NULL == rgelt )
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return E_POINTER;
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if( (celt > 1) && (NULL == pceltFetched) )
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return E_INVALIDARG;
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ULONG c = 0;
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typename std::vector<T>::iterator end = _v.end();
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while( (c < celt) && (_i != end) )
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{
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rgelt[c] = *_i;
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if( NULL != _retain ) _retain(rgelt[c]);
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++_i;
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++c;
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}
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if( NULL != pceltFetched )
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*pceltFetched = c;
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return (c == celt) ? S_OK : S_FALSE;
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};
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template<class T>
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STDMETHODIMP VLCEnum<T>::Skip(ULONG celt)
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{
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ULONG c = 0;
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typename std::vector<T>::iterator end = _v.end();
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while( (c < celt) && (_i != end) )
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{
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++_i;
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++c;
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}
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return (c == celt) ? S_OK : S_FALSE;
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};
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template<class T>
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STDMETHODIMP VLCEnum<T>::Reset(void)
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{
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_i= _v.begin();
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return S_OK;
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};
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#endif
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