memfsys.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: memfsys.cpp,v 1.3.38.2 2004/07/12 23:05:02 sehancher Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
 * RealNetworks.  You may not use this file except in compliance with
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 * 
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
 * 
 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK ***** */

/////////////////////////////////////////////////////////////////////////////
// 
//  Memory File System for chunky res objects
//
//  This is a memory file system, it stores data in chunky res objects and
//  allows access to these objects as if they were files
//

#define INITGUID    1

#include "hxcom.h"
#include "hxtypes.h"
#include "memfsys.ver"

#include "hxcomm.h"
#include "ihxpckts.h"
#include "hxfiles.h"
#include "hxplugn.h"
#include "hxengin.h"
#include "hxcore.h"
#include "hxprefs.h"
#include "hxrendr.h"
#include "hxauth.h"
#include "hxauthn.h"
#include "hxplgns.h"
#include "hxpends.h"

#undef INITGUID

#include "hxathsp.h"
#include "hxcorsp.h"
#include "hxpktsp.h"
#include "hxcomsp.h"
#include "hxplnsp.h"

#include "timeval.h"
#include "dbcs.h"	/* for HXCompareStrings */
#include "hxstring.h"	/* for CHXString */
#include "hxurl.h"	/* for CHXURL */
#include "hxxfile.h"	/* for HXXFile::GetReasonableLocalFileName() */
#include "hxstrutl.h"
#include "hxver.h"
#include "chxpckts.h"
#include "hxslist.h"
#include "chunkres.h"

#include <stdio.h>
#include <string.h>

#ifdef _MACINTOSH
#include <fcntl.h>
#include "chxdataf.h"	// Macintosh file i/o
#include "macasyncfile.h"  // Macintosh interrupt file i/o
#elif (defined (_WINDOWS ) || defined (_WIN32)) && !defined(WIN32_PLATFORM_PSPC)
#include <direct.h>
#else
#include "hlxclib/sys/types.h"
#include "hlxclib/sys/stat.h"
#endif
#include "findfile.h"
#include "mfsiface.h"
#include "memfsys.h"

#if defined (_WINDOWS ) || defined (_WIN32)
#define OS_SEPARATOR_CHAR	'\\'
#define OS_SEPARATOR_STRING	"\\"
#elif defined (_UNIX)
#define OS_SEPARATOR_CHAR	'/'
#define OS_SEPARATOR_STRING	"/"
#elif defined (__MWERKS__)
#define OS_SEPARATOR_CHAR	':'
#define OS_SEPARATOR_STRING	":"
#endif // defined (_WINDOWS ) || defined (WIN32)

#ifdef _WIN16
#define MAX_RECURSION_LEVEL	10
#elif _LINUX
#define MAX_RECURSION_LEVEL	30
#else
#define MAX_RECURSION_LEVEL	200
#endif

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static char HX_THIS_FILE[] = __FILE__;
#endif

#ifdef _AIX
#include "hxtbuf.h"
#include "dllpath.h"
ENABLE_MULTILOAD_DLLACCESS_PATHS(Memfsys);
#endif

INT32 g_nMemFSysRefCount = 0;

const char* CMemoryFileSystem::zm_pDescription	= "RealNetworks Memory File System";
const char* CMemoryFileSystem::zm_pCopyright	= HXVER_COPYRIGHT;
const char* CMemoryFileSystem::zm_pMoreInfoURL	= HXVER_MOREINFO;
const char* CMemoryFileSystem::zm_pShortName	= "pn-memory";
const char* CMemoryFileSystem::zm_pProtocol	= "mem";

IHXMemoryFileContext* CMemoryFileSystem::z_pMemCtx = NULL;

CChunkyResMgr*	    g_pChunkyResMgr	    = NULL;
CHXMapPtrToPtr*	    g_pMapChunkyToStatus    = NULL;
CHXMapPtrToPtr*	    g_pMapStreamToChunky    = NULL;
CHXMapStringToOb*  g_pMapURLToResponse	    = NULL;

UINT32 CMemoryFileSystem::z_uMaxRecursionLevel = MAX_RECURSION_LEVEL;



/****************************************************************************
 * 
 *  Function:
 * 
 *	HXCreateInstance()
 * 
 *  Purpose:
 * 
 *	Function implemented by all plugin DLL's to create an instance of 
 *	any of the objects supported by the DLL. This method is similar to 
 *	Window's CoCreateInstance() in its purpose, except that it only 
 *	creates objects from this plugin DLL.
 *
 *	NOTE: Aggregation is never used. Therefore and outer unknown is
 *	not passed to this function, and you do not need to code for this
 *	situation.
 * 
 */

STDAPI ENTRYPOINT(HXCREATEINSTANCE)
(
    IUnknown**  /*OUT*/	ppIUnknown
)
{
    if (!g_pChunkyResMgr)
    {
	g_pChunkyResMgr = new CChunkyResMgr;
	if (!g_pChunkyResMgr)
	{
	    return HXR_OUTOFMEMORY;
	}
    }

    if (!g_pMapChunkyToStatus)
    {
	g_pMapChunkyToStatus = new CHXMapPtrToPtr;
	if (!g_pMapChunkyToStatus)
	{
	    return HXR_OUTOFMEMORY;
	}
    }

    if (!g_pMapStreamToChunky)
    {
	g_pMapStreamToChunky = new CHXMapPtrToPtr;
	if (!g_pMapStreamToChunky)
	{
	    return HXR_OUTOFMEMORY;
	}
    }

    if (!g_pMapURLToResponse)
    {
	g_pMapURLToResponse = new CHXMapStringToOb;
	if (!g_pMapURLToResponse)
	{
	    return HXR_OUTOFMEMORY;
	}
    }

    *ppIUnknown = (IUnknown*)(IHXPlugin*) new CMemoryFileSystem;
    if (*ppIUnknown)
    {
	(*ppIUnknown)->AddRef();
	return HXR_OK;
    }
    return HXR_OUTOFMEMORY;
}

/****************************************************************************
 * 
 *  Function:
 * 
 *	CanUnload()
 * 
 *  Purpose:
 * 
 *	Function implemented by all plugin DLL's if it returns HXR_OK 
 *	then the pluginhandler can unload the DLL
 *
 */
STDAPI CanUnload(void)
{
    return (g_nMemFSysRefCount ? HXR_FAIL : HXR_OK);
}


/****************************************************************************
 * 
 *  Function:
 * 
 *	HXShutdown()
 * 
 *  Purpose:
 * 
 *	Function implemented by all plugin DLL's to free any *global* 
 *	resources. This method is called just before the DLL is unloaded.
 *
 */
STDAPI HXShutdown(void)
{
    HX_ASSERT(!g_nMemFSysRefCount);
    POSITION p;

    HX_RELEASE(CMemoryFileSystem::z_pMemCtx);

    if (g_pChunkyResMgr)
    {
	delete g_pChunkyResMgr;
	g_pChunkyResMgr = NULL;
    }

    if (g_pMapStreamToChunky)
    {
	delete g_pMapStreamToChunky;
	g_pMapStreamToChunky = NULL;
    }

    if (g_pMapChunkyToStatus)
    {
	CMemoryFileStatus* pStatus;
	CChunkyRes* pRes;
	p = g_pMapChunkyToStatus->GetStartPosition();
	while (p)
	{
	    g_pMapChunkyToStatus->GetNextAssoc(p, (void*&)pRes, (void*&)pStatus);
	    HX_ASSERT(pStatus);
	    HX_RELEASE(pStatus);
	}

	delete g_pMapChunkyToStatus;
	g_pMapChunkyToStatus = NULL;
    }

    if (g_pMapURLToResponse)
    {
	CHXString sURL;
	IHXFileResponse* pResponse;

	p = g_pMapURLToResponse->GetStartPosition();
	while (p)
	{
	    g_pMapURLToResponse->GetNextAssoc(p, sURL, (void*&)pResponse);
	    HX_ASSERT(pResponse);
	    pResponse->InitDone(HXR_FAIL);
	    HX_RELEASE(pResponse);
	}

	delete g_pMapURLToResponse;
	g_pMapURLToResponse = NULL;
    }

    return HXR_OK;
}



CMemoryFileStatus::CMemoryFileStatus(IHXMemoryFileContext* pContext, 
				     void* pID,
				     const char* pMime)
    : m_pContext(pContext)
    , m_pID(pID)
    , m_ulSize(0)
    , m_ulContentSize(0)
    , m_bDone(FALSE)
    , m_pMime(NULL)
    , m_lRefCount(0)
{
    HX_ASSERT(m_pContext);
    m_pContext->AddRef();

    SetMime(pMime);
}


CMemoryFileStatus::~CMemoryFileStatus()
{
    HX_RELEASE(m_pContext);

    if (m_pMime)
    {
	delete[] m_pMime;
    }
}


void CMemoryFileStatus::SetMime(const char* pMime)
{
    if (m_pMime)
    {
	delete[] m_pMime;
	m_pMime = NULL;
    }

    if (pMime && *pMime)
    {
	m_pMime = new char[strlen(pMime)+1];
	if (m_pMime)
	{
	    strcpy(m_pMime, pMime); /* Flawfinder: ignore */
	}
    }
}



LONG32 CMemoryFileStatus::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}


LONG32 CMemoryFileStatus::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}


void CMemoryFileStatus::SetDone(BOOL bDone)
{ 
    m_bDone = bDone;

    // Someone aborted this thing!
    if (m_ulSize < m_ulContentSize)
    {
	m_ulContentSize = m_ulSize;
    }
}



IHXMemoryFileContext* CMemoryFileStatus::GetContext()
{
    m_pContext->AddRef();
    return m_pContext;
}



CMemoryFileSystem::CMemoryFileSystem()
    : m_lRefCount(0)
    , m_pContext(0)
    , m_options(NULL)
{
    g_nMemFSysRefCount++;
}

CMemoryFileSystem::~CMemoryFileSystem()
{
    HX_ASSERT(g_nMemFSysRefCount > 0);
    g_nMemFSysRefCount--;

    if (m_pContext)
    {
	m_pContext->Release();
	m_pContext = 0;
    }

    if(m_options)
    {
	m_options->Release();
	m_options = 0;
    }
}

/************************************************************************
 *  Method:
 *    IHXPlugin::InitPlugin
 *  Purpose:
 *    Initializes the plugin for use. This interface must always be
 *    called before any other method is called. This is primarily needed 
 *    so that the plugin can have access to the context for creation of
 *    IHXBuffers and IMalloc.
 */
STDMETHODIMP CMemoryFileSystem::InitPlugin(IUnknown* /*IN*/ pContext)
{
    HX_RESULT		lResult;
    IHXPreferences*	prefs = 0;
    IHXBuffer*		base_path_buf = 0;

    if (pContext && !m_pContext)
    {
        m_pContext = pContext;
	m_pContext->AddRef();

	if(!m_options ||
	   (HXR_OK != m_options->GetPropertyBuffer("BasePath", base_path_buf)))
	{
	    lResult = pContext->QueryInterface(IID_IHXPreferences, 
					       (void**) &prefs);
	    if (lResult == HXR_OK)
	    {
		lResult = prefs->ReadPref("BasePath", base_path_buf);
		if (lResult == HXR_OK)
		{
		    m_base_path = CHXString((char*)base_path_buf->GetBuffer());
		}
	    }
	}
	else
	{
	    m_base_path = CHXString((char*)base_path_buf->GetBuffer());
	}
    }

    if (prefs)
    {
	prefs->Release();
	prefs = 0;
    }

    if (base_path_buf)
    {
	base_path_buf->Release();
	base_path_buf = 0;
    }

    return HXR_OK;
}

/************************************************************************
 *  Method:
 *    IHXPlugin::GetPluginInfo
 *  Purpose:
 *    Returns the basic information about this plugin. Including:
 *
 *    unInterfaceCount	the number of standard RMA interfaces 
 *			supported by this plugin DLL.
 *    pIIDList		array of IID's for standard RMA interfaces
 *			supported by this plugin DLL.
 *    bLoadMultiple	whether or not this plugin DLL can be loaded
 *			multiple times. All File Formats must set
 *			this value to TRUE.
 *    pDescription	which is used in about UIs (can be NULL)
 *    pCopyright	which is used in about UIs (can be NULL)
 *    pMoreInfoURL	which is used in about UIs (can be NULL)
 */
STDMETHODIMP CMemoryFileSystem::GetPluginInfo
(
    REF(BOOL)        /*OUT*/ bLoadMultiple,
    REF(const char*) /*OUT*/ pDescription,
    REF(const char*) /*OUT*/ pCopyright,
    REF(const char*) /*OUT*/ pMoreInfoURL,
    REF(ULONG32)     /*OUT*/ ulVersionNumber
)
{
    bLoadMultiple = TRUE;

    pDescription    = zm_pDescription;
    pCopyright	    = zm_pCopyright;
    pMoreInfoURL    = zm_pMoreInfoURL;
    ulVersionNumber = TARVER_ULONG32_VERSION;

    return HXR_OK;
}


// *** IUnknown methods ***

/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::QueryInterface
//  Purpose:
//	Implement this to export the interfaces supported by your 
//	object.
//
STDMETHODIMP CMemoryFileSystem::QueryInterface(REFIID riid, void** ppvObj)
{
    if (IsEqualIID(riid, IID_IUnknown))
    {
	AddRef();
	*ppvObj = this;
	return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXPlugin))
    {
	AddRef();
	*ppvObj = (IHXPlugin*)this;
	return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXFileSystemObject))
    {
	AddRef();
	*ppvObj = (IHXFileSystemObject*)this;
	return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXMemoryFileSystem))
    {
	AddRef();
	*ppvObj = (IHXMemoryFileSystem*)this;
	return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXMemoryFileSystem2))
    {
	AddRef();
	*ppvObj = (IHXMemoryFileSystem2*)this;
	return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXValues))
    {
	AddRef();
	*ppvObj = (IHXValues*)this;
	return HXR_OK;
    }

    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::AddRef
//  Purpose:
//	Everyone usually implements this the same... feel free to use
//	this implementation.
//
STDMETHODIMP_(ULONG32) CMemoryFileSystem::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::Release
//  Purpose:
//	Everyone usually implements this the same... feel free to use
//	this implementation.
//
STDMETHODIMP_(ULONG32) CMemoryFileSystem::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

STDMETHODIMP CMemoryFileSystem::GetFileSystemInfo
(