filehdlr.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: filehdlr.cpp,v 1.2.24.1 2004/07/09 01:52:03 hubbe 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 ***** */

// include
#include "hxtypes.h"
#include "hxwintyp.h"
#include "hxcom.h"
#include "hxresult.h"
#include "hxcomm.h"
#include "hxengin.h"
#include "ihxpckts.h"
#include "hxfiles.h"
#include "hxformt.h"
#include "hxplugn.h"
#include "hxengin.h"
#include "hxmon.h"
#include "ihxfgbuf.h"

// pnmisc
#include "baseobj.h"
#include "unkimp.h"

// pncont
#include "hxslist.h"
#include "hxmap.h"
#include "hxbuffer.h"
#include "carray.h"
#include "chxfgbuf.h"

// pxcomlib
#include "pxrect.h"
#include "pxcolor.h"
#include "pxeffect.h"
#include "pxcmpmgr.h"
#include "wirefmgr.h"
#include "pxffmcod.h"
#include "rpfile.h"
#include "pxffcmgr.h"

// pxff
#include "pxschedu.h"
#include "pxff2.h"
#include "filehdlr.h"

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

PXFileHandler::PXFileHandler()
{
#ifdef XXXMEH_DEBUG_LOG
    DEBUG_OUTF("c:\\pxff.log", (s, "PXFileHandler::PXFileHandler(0x%08X)\n", this));
#endif
    m_lRefCount           = 0;
    m_pContext            = NULL;
    m_pRPFileObject       = NULL;
    m_pResponse           = NULL;
    m_pCommonClassFactory = NULL;
    m_pFileSystemManager  = NULL;
    m_pFileObject         = NULL;
    m_pFragBuffer         = NULL;
    m_pImageNameStr       = NULL;
    m_pImageMimeTypeStr   = NULL;
    m_pFileStat           = NULL;
    m_pFileMimeMapper     = NULL;
    Reset();
}

PXFileHandler::~PXFileHandler()
{
#ifdef XXXMEH_DEBUG_LOG
    DEBUG_OUTF("c:\\pxff.log", (s, "PXFileHandler::~PXFileHandler(0x%08X)\n", this));
#endif
    Deallocate();
}

STDMETHODIMP PXFileHandler::Init(IUnknown*           pContext,
                                 IHXFileObject*     pRPFileObject,
                                 CRealPixFileFormat* pResponse,
				 ULONG32             ulReadChunkSize)
{
#ifdef XXXMEH_DEBUG_LOG
    DEBUG_OUTF("c:\\pxff.log", (s, "PXFileHandler::Init(0x%08X,0x%08X,0x%08X,0x%08X)\n",
           this, pContext, pRPFileObject, pResponse));
#endif
    HX_RESULT retVal = HXR_OK;

    if (pContext && pRPFileObject && pResponse)
    {
        // Clear out everything
        Deallocate();
        Reset();

	m_ulReadChunkSize = ulReadChunkSize;

        // Save arguments into members
        m_pContext = pContext;
        m_pContext->AddRef();
        m_pRPFileObject = pRPFileObject;
        m_pRPFileObject->AddRef();
        m_pResponse = pResponse;
        m_pResponse->AddRef();

        // Get an IHXCommonClassFactory interface
        retVal = m_pContext->QueryInterface(IID_IHXCommonClassFactory,
                                            (void**) &m_pCommonClassFactory);
        if (SUCCEEDED(retVal))
        {
            // Get an IHXFileSystemManager interface
            retVal = m_pCommonClassFactory->CreateInstance(CLSID_IHXFileSystemManager,
                                                           (void**) &m_pFileSystemManager);
            if (SUCCEEDED(retVal))
            {
                // Set the state
                m_ulState = kStateInitialized;
            }
        }
    }
    else
    {
        retVal = HXR_INVALID_PARAMETER;
    }

    if (FAILED(retVal))
    {
        m_ulState = kStateError;
    }

    return retVal;
}

STDMETHODIMP PXFileHandler::ReadRPFile()
{
#ifdef XXXMEH_DEBUG_LOG
    DEBUG_OUTF("c:\\pxff.log", (s, "PXFileHandler::ReadRPFile(0x%08X)\n", this));
#endif
    HX_RESULT retVal = HXR_OK;

    if (m_ulState == kStateInitialized)
    {
        // Set state
        m_ulState = kStateReadRPFileInit;
        // Init the file object
        m_pRPFileObject->Init(HX_FILE_READ | HX_FILE_BINARY, this);
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

STDMETHODIMP PXFileHandler::StatImageFile(UINT32 ulInstance, IHXBuffer* pImageNameStr)
{
#ifdef XXXMEH_DEBUG_LOG
    DEBUG_OUTF("c:\\pxff.log", (s, "PXFileHandler::StatImageFile(0x%08X,%lu,%s)\n",
               this, ulInstance, (const char*) pImageNameStr->GetBuffer()));
#endif
    HX_RESULT retVal = HXR_OK;

    if (m_ulState == kStateInitialized)
    {
        if (pImageNameStr)
        {
            // Save the instance index
            m_ulInstance = ulInstance;

            // Save the name buffer
            HX_RELEASE(m_pImageNameStr);
            m_pImageNameStr = pImageNameStr;
            m_pImageNameStr->AddRef();

            // Set the state
            m_ulState = kStateStatImageFileFSMInit;

            // Init the file system manager
            retVal = m_pFileSystemManager->Init(this);
        }
        else
        {
            retVal = HXR_INVALID_PARAMETER;
        }

        if (FAILED(retVal))
        {
            m_ulState = kStateError;
            m_pResponse->StatImageFileDone(retVal, ulInstance, 0, NULL);
        }
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

STDMETHODIMP PXFileHandler::ReadImageFile(UINT32 ulInstance, IHXBuffer* pImageNameStr)
{
#ifdef XXXMEH_DEBUG_LOG
    DEBUG_OUTF("c:\\pxff.log", (s, "PXFileHandler::ReadImageFile(0x%08X,%lu,%s)\n",
               this, ulInstance, (const char*) pImageNameStr->GetBuffer()));
#endif
    HX_RESULT retVal = HXR_OK;

    if (m_ulState == kStateInitialized)
    {
        if (ulInstance && pImageNameStr)
        {
            // Save the handle
            m_ulInstance = ulInstance;
            // Save the image name
            HX_RELEASE(m_pImageNameStr);
            m_pImageNameStr = pImageNameStr;
            m_pImageNameStr->AddRef();
            // Set the state
            m_ulState = kStateReadImageFileFSMInit;
            // Init the file system manager
            m_pFileSystemManager->Init(this);
        }
        else
        {
            retVal = HXR_INVALID_PARAMETER;
        }

        if (FAILED(retVal))
        {
            m_ulState = kStateError;
            m_pResponse->ReadImageFileDone(retVal, ulInstance, NULL);
        }
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

STDMETHODIMP PXFileHandler::Shutdown()
{
#ifdef XXXMEH_DEBUG_LOG
    DEBUG_OUTF("c:\\pxff.log", (s, "PXFileHandler::Shutdown(0x%08X)\n", this));
#endif
    HX_RESULT retVal = HXR_OK;

    if (m_pResponse)
    {
        if (m_ulState == kStateConstructed          ||
            m_ulState == kStateError                ||
            m_ulState == kStateInitialized          ||
            m_ulState == kStateReadRPFileDone       ||
            m_ulState == kStateStatImageFileDone    ||
            m_ulState == kStateReadImageFileDone)
        {
            // In these cases, we there is no pending callback
            // because we either finished or we never started.
            // Therefore we simply change the state to the final
            // state and call ShutdownDone().
            m_ulState = kStateShutdownDone;
            // Call ShutdownDone()
            m_pResponse->ShutdownDone(HXR_OK, m_ulInstance);
        }
        else if (m_ulState == kStateReadRPFileInit ||
                 m_ulState == kStateReadRPFileRead ||
                 m_ulState == kStateReadRPFileHold)
        {
            // Here we have an .rp file object for which we're 
            // waiting on a pending callback. We will call 
            // Close() on this file object and then wait on
            // the CloseDone() to call ShutdownDone() in the application.
            // Depending on the file system, the pending callback may come
            // back immediately or it may come back normally.
            // All that we have to do is make sure that we do
            // nothing in that callback.
            //
            // First we change the state
            m_ulState = kStateShutdownClose;
            // Call Close on the .rp file object
            m_pRPFileObject->Close();
        }
        else if (m_ulState == kStateStatImageFileInit ||
                 m_ulState == kStateStatImageFileStat ||
                 m_ulState == kStateStatImageFileMime ||
                 m_ulState == kStateReadImageFileInit ||
                 m_ulState == kStateReadImageFileRead)
        {
            // Here we have an image file object for which we're 
            // waiting on a pending callback. We will call 
            // Close() on this image file object and then wait on
            // the CloseDone() to call ShutdownDone() in the application.
            // Depending on the file system, the pending callback may come
            // back immediately or it may come back normally.
            // All that we have to do is make sure that we do
            // nothing in that callback.
            //
            // First change the state
            m_ulState = kStateShutdownClose;
            // Call Close()
            m_pFileObject->Close();
        }
        else if (m_ulState == kStateReadRPFileClose    ||
                 m_ulState == kStateStatImageFileClose ||
                 m_ulState == kStateReadImageFileClose)
        {
            // Here we have already called Close() on the
            // file object so we don't have to do it again.
            // We simply have to set the state and when we
            // get called back with CloseDone(), then we need
            // to call ShutdownDone() instead of the normal
            // callback to the application.
            m_ulState = kStateShutdownClose;
        }
        else if (m_ulState == kStateStatImageFileFSMInit ||
                 m_ulState == kStateStatImageFileCreate  ||
                 m_ulState == kStateReadImageFileFSMInit ||
                 m_ulState == kStateReadImageFileCreate)
        {
            // Here we are waiting on callbacks from the 
            // file system manager. In these cases, we simply
            // need to change the state to the final state
            // and then call ShutdownDone() in the application.
            // Also, we need to make sure that we don't do anything
            // when/if the pending callback comes back.
            m_ulState = kStateShutdownDone;
            // Call ShutdownDone() in the application
            m_pResponse->ShutdownDone(HXR_OK, m_ulInstance);
        }
        else if (m_ulState == kStateShutdownClose)
        {
            // We've already set this object up for shutdown
            // and are awaiting a CloseDone() from the file
            // object. Therefore, we will return HXR_UNEXPECTED;
            retVal = HXR_UNEXPECTED;
        }
        else if (m_ulState == kStateShutdownDone)
        {
            // We've already shut this object down, so
            // will return HXR_UNEXPECTED
            retVal = HXR_UNEXPECTED;
        }
        else
        {
            // Unknown state
            retVal = HXR_UNEXPECTED;
        }
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

STDMETHODIMP_(UINT32) PXFileHandler::GetInstanceHandle()
{
    return m_ulInstance;
}

STDMETHODIMP_(BOOL) PXFileHandler::IsShutdownDone()
{
    return (m_ulState == kStateShutdownDone ? TRUE : FALSE);
}