www.pudn.com > eMule0.47c-Sources.zip > ID3Frame.cpp

///////////////////////////////////////////////////////////////////////////// 
// Copyright (c) 2000 John Adcock.  All rights reserved. 
///////////////////////////////////////////////////////////////////////////// 
// 
// This library is free software; you can redistribute it and/or modify it 
// under the terms of the GNU Library General Public License as published by 
// the Free Software Foundation; either version 2 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 Library General Public 
// License for more details. 
// 
// You should have received a copy of the GNU Library General Public License 
// along with this library; if not, write to the Free Software Foundation, 
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
 
// The id3lib authors encourage improvements and optimisations to be sent to 
// the id3lib coordinator.  Please see the README file for details on where to 
// send such submissions.  See the AUTHORS file for a list of people who have 
// contributed to id3lib.  See the ChangeLog file for a list of changes to 
// id3lib.  These files are distributed with id3lib at 
// http://download.sourceforge.net/id3lib/ 
// 
///////////////////////////////////////////////////////////////////////////// 
// ID3Frame.cpp : Implementation of CID3Frame 
///////////////////////////////////////////////////////////////////////////// 
// Change Log 
// 
// Date          Developer             Changes 
// 
// 05 Jan 2000   John Adcock           Original Release     
// 26 Apr 2000   John Adcock           Got working with id3lib 3.7.3 
// 18 Aug 2000   Philip Oldaker        Added Picture Functionality 
// 
///////////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "ID3COM.h" 
#include "ID3Frame.h" 
#include "ID3Field.h" 
 
///////////////////////////////////////////////////////////////////////////// 
// CID3Frame 
 
CID3Frame::CID3Frame() 
{ 
	m_Frame = NULL; 
	m_TagParent = NULL; 
} 
 
CID3Frame::~CID3Frame() 
{ 
	if(m_TagParent != NULL) 
	{ 
		m_TagParent->Release(); 
	} 
	m_Frame = NULL; 
} 
 
IID3ComFrame* CID3Frame::CreateObject(IID3ComTag* TagParent, ID3_Frame* Frame) 
{ 
	CComObject* pRetVal = new CComObject; 
	pRetVal->m_Frame = Frame; 
	pRetVal->m_TagParent = TagParent; 
	TagParent->AddRef(); 
	return (IID3ComFrame*)pRetVal; 
} 
 
STDMETHODIMP CID3Frame::InterfaceSupportsErrorInfo(REFIID riid) 
{ 
	static const IID* arr[] =  
	{ 
		&IID_IID3ComFrame 
	}; 
	for (int i=0; i < sizeof(arr) / sizeof(arr[0]); i++) 
	{ 
		if (InlineIsEqualGUID(*arr[i],riid)) 
			return S_OK; 
	} 
	return S_FALSE; 
} 
 
STDMETHODIMP CID3Frame::get_Field(eID3FieldTypes FieldType, IID3ComField** pVal) 
{ 
	try 
	{ 
		*pVal = NULL; 
		ID3_Field* Field = &(m_Frame->Field((enum ID3_FieldID)FieldType)); 
        if(Field != NULL) 
        { 
		    *pVal = CID3Field::CreateObject(this, Field); 
		    (*pVal)->AddRef(); 
        } 
        else 
        { 
            *pVal = NULL; 
        } 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return AtlReportError(CLSID_ID3ComFrame, "An unexpected error has occurred", IID_IID3ComFrame, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Frame::Clear() 
{ 
	try 
	{ 
		m_Frame->Clear(); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return AtlReportError(CLSID_ID3ComFrame, "An unexpected error has occurred", IID_IID3ComFrame, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Frame::get_ID(eID3FrameTypes *pVal) 
{ 
	try 
	{ 
		*pVal = ID3_NOFRAME; 
		*pVal = (eID3FrameTypes)m_Frame->GetID(); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return AtlReportError(CLSID_ID3ComFrame, "An unexpected error has occurred", IID_IID3ComFrame, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Frame::put_ID(eID3FrameTypes newVal) 
{ 
	try 
	{ 
		m_Frame->SetID((ID3_FrameID)newVal); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return AtlReportError(CLSID_ID3ComFrame, "An unexpected error has occurred", IID_IID3ComFrame, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Frame::get_FrameName(BSTR *pVal) 
{ 
	USES_CONVERSION; 
	try 
	{ 
		const char* sDesc = m_Frame->GetDescription(); 
		if(sDesc != NULL) 
		{ 
			*pVal = SysAllocString(A2W(sDesc)); 
		} 
		else 
		{ 
			*pVal = SysAllocString(L"Unknown Frame"); 
		} 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return AtlReportError(CLSID_ID3ComFrame, "An unexpected error has occurred", IID_IID3ComFrame, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Frame::put_Compressed(VARIANT_BOOL newVal) 
{ 
	try 
	{ 
		m_Frame->SetCompression(newVal == VARIANT_TRUE); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return AtlReportError(CLSID_ID3ComFrame, "An unexpected error has occurred", IID_IID3ComFrame, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Frame::get_Compressed(VARIANT_BOOL *pVal) 
{ 
	USES_CONVERSION; 
	try 
	{ 
		if(m_Frame->GetCompression()) 
		{ 
			*pVal = VARIANT_TRUE; 
		} 
		else 
		{ 
			*pVal = VARIANT_FALSE; 
		} 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return AtlReportError(CLSID_ID3ComFrame, "An unexpected error has occurred", IID_IID3ComFrame, E_UNEXPECTED); 
	} 
}