comimgff.cpp

来自「symbian 下的helix player源代码」· C++ 代码 · 共 1,025 行 · 第 1/3 页

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 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 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (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.  
 *  
 * 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 "hxcom.h"
#include "hxtypes.h"
#include "hxwintyp.h"
#include "hxcomm.h"
#include "ihxpckts.h"
#include "hxfiles.h"
#include "hxformt.h"
#include "hxplugn.h"
#include "hxver.h"
#include "baseobj.h"
#include "pckunpck.h"
#include "jpegdef.h"
#include "wbmphdr.h"
#include "unifimg.h"
#include "comimgff.h"
#include "comimgff.ver"

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

const char* const CCommonImageFileFormat::m_pszDescription       = "Helix Common Image File Format Plugin";
const char* const CCommonImageFileFormat::m_pszCopyright         = HXVER_COPYRIGHT;
const char* const CCommonImageFileFormat::m_pszMoreInfoURL       = HXVER_MOREINFO;
const char* const CCommonImageFileFormat::m_ppszFileMimeTypes[]  = {"image/jpeg", "image/png", "image/x-wap.wbmp", NULL};
const char* const CCommonImageFileFormat::m_ppszFileExtensions[] = {"jpg", "jpeg", "jpe", "jfif", "png",  "wbmp", NULL};
const char* const CCommonImageFileFormat::m_ppszFileOpenNames[]  = {"Images (*.jpg,*.png,*.wbmp)", NULL};
const char* const CCommonImageFileFormat::m_ppszStreamMimeType[] = {"image/jpeg", "image/png", "image/x-wap.wbmp", NULL};

CCommonImageFileFormat::CCommonImageFileFormat()
{
    m_lRefCount             = 0;
    m_pContext              = NULL;
    m_pFileObject           = NULL;
    m_pFormatResponse       = NULL;
    m_pCommonClassFactory   = NULL;
    m_pFileMimeMapper       = NULL;
    m_pURLStr               = NULL;
    m_pMimeTypeStr          = NULL;
    m_ulState               = kStateReady;
    m_ulFileOffset          = 0;
    m_ulDesiredFileOffset   = 0;
    m_ulRequestedFileOffset = 0;
    m_ulHeaderReadSize      = kInitialHeaderReadSize;
    m_bFileObjectOpen       = FALSE;
};

CCommonImageFileFormat::~CCommonImageFileFormat()
{
    if (m_pFileObject)
    {
        m_pFileObject->Close();
    }
    HX_RELEASE(m_pContext);
    HX_RELEASE(m_pFileObject);
    HX_RELEASE(m_pFormatResponse);
    HX_RELEASE(m_pCommonClassFactory);
    HX_RELEASE(m_pFileMimeMapper);
    HX_RELEASE(m_pURLStr);
    HX_RELEASE(m_pMimeTypeStr);
};

STDMETHODIMP CCommonImageFileFormat::QueryInterface(REFIID riid, void** ppvObj)
{
    HX_RESULT retVal = HXR_FAIL;

    if (ppvObj)
    {
        // Set defaults
        *ppvObj = NULL;
        retVal  = HXR_OK;
        // Switch on iid
        if (IsEqualIID(riid, IID_IUnknown))
        {
            AddRef();
            *ppvObj = (IUnknown*) (CHXBaseCountingObject*) (IHXPlugin*) this;
        }
        else if (IsEqualIID(riid, IID_IHXPlugin))
        {
            AddRef();
            *ppvObj = (IHXPlugin*) this;
        }
        else if (IsEqualIID(riid, IID_IHXFileFormatObject))
        {
            AddRef();
            *ppvObj = (IHXFileFormatObject*) this;
        }
        else if (IsEqualIID(riid, IID_IHXFileResponse))
        {
            AddRef();
            *ppvObj = (IHXFileResponse*) this;
        }
        else if (IsEqualIID(riid, IID_IHXFileMimeMapperResponse))
        {
            AddRef();
            *ppvObj = (IHXFileMimeMapperResponse*) this;
        }
        else
        {
            retVal = HXR_NOINTERFACE;
        }
    }

    return retVal;
}

STDMETHODIMP_(UINT32) CCommonImageFileFormat::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

STDMETHODIMP_(UINT32) CCommonImageFileFormat::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;

    return 0;
}

STDMETHODIMP CCommonImageFileFormat::GetPluginInfo(REF(BOOL)        rbLoadMultiple,
                                                   REF(const char*) rpszDescription,
                                                   REF(const char*) rpszCopyright,
                                                   REF(const char*) rpszMoreInfoURL,
                                                   REF(UINT32)      rulVersionNumber)
{
    rbLoadMultiple   = TRUE;
    rpszDescription  = (const char*) m_pszDescription;
    rpszCopyright    = (const char*) m_pszCopyright;
    rpszMoreInfoURL  = (const char*) m_pszMoreInfoURL;
    rulVersionNumber = TARVER_ULONG32_VERSION;

    return HXR_OK;
}

STDMETHODIMP CCommonImageFileFormat::InitPlugin(IUnknown* pContext)
{
    HX_RESULT retVal = HXR_FAIL;

    if (pContext)
    {
        // Save a copy of the calling context
        HX_RELEASE(m_pContext);
        m_pContext = pContext;
        m_pContext->AddRef();
        // Get an interface to the common class factory
        HX_RELEASE(m_pCommonClassFactory);
        retVal = m_pContext->QueryInterface(IID_IHXCommonClassFactory,
                                            (void**) &m_pCommonClassFactory);
    }

    return retVal;
}


STDMETHODIMP CCommonImageFileFormat::GetFileFormatInfo(REF(const char**) rppszFileMimeTypes,
                                                       REF(const char**) rppszFileExtensions,  
                                                       REF(const char**) rppszFileOpenNames)
{
    rppszFileMimeTypes  = (const char**) m_ppszFileMimeTypes;
    rppszFileExtensions = (const char**) m_ppszFileExtensions;
    rppszFileOpenNames  = (const char**) m_ppszFileOpenNames;

    return HXR_OK;
}

STDMETHODIMP CCommonImageFileFormat::InitFileFormat(IHXRequest*        pRequest, 
                                                    IHXFormatResponse* pFormatResponse,
                                                    IHXFileObject*     pFileObject)
{
    HX_RESULT retVal = HXR_FAIL;

    if (pRequest && pFormatResponse && pFileObject)
    {
        if (m_ulState == kStateReady)
        {
            // Save members
            HX_RELEASE(m_pFormatResponse);
            m_pFormatResponse = pFormatResponse;
            m_pFormatResponse->AddRef();
            HX_RELEASE(m_pFileObject);
            m_pFileObject = pFileObject;
            m_pFileObject->AddRef();
            // Get the URL from the request
            const char* pszURL = NULL;
            retVal = pRequest->GetURL(pszURL);
            if (SUCCEEDED(retVal))
            {
                // Save the URL
                HX_RELEASE(m_pURLStr);
                retVal = CreateStringBuffer(m_pURLStr, pszURL, m_pContext);
                if (SUCCEEDED(retVal))
                {
                    // Set the state
                    m_ulState = kStateIFFInitDonePending;
                    // Clear the return value
                    retVal = HXR_OK;
                    // Init the file object
                    m_pFileObject->Init(HX_FILE_READ | HX_FILE_BINARY, this);
                }
            }
        }
    }

    if (FAILED(retVal) && pFormatResponse)
    {
        pFormatResponse->InitDone(HXR_FAIL);
    }

    return retVal;
}

STDMETHODIMP CCommonImageFileFormat::GetFileHeader()
{
    HX_RESULT retVal = HXR_UNEXPECTED;

    if (m_ulState == kStateReady)
    {
        // Get an IHXValues object
        IHXValues* pHeader = NULL;
        retVal = m_pCommonClassFactory->CreateInstance(CLSID_IHXValues,
                                            (void**) &pHeader);
        if (SUCCEEDED(retVal))
        {
            // Set the stream count
            pHeader->SetPropertyULONG32("StreamCount", 1);
            // Call the response interface
            m_pFormatResponse->FileHeaderReady(HXR_OK, pHeader);
        }
        HX_RELEASE(pHeader);
    }

    if (FAILED(retVal) && m_pFormatResponse)
    {
        m_pFormatResponse->FileHeaderReady(retVal, NULL);
    }

    return retVal;
}

STDMETHODIMP CCommonImageFileFormat::GetStreamHeader(UINT16 usStreamNum)
{
    HX_RESULT retVal = HXR_UNEXPECTED;

    if (m_ulState == kStateReady)
    {
        // Clear the return value
        retVal = HXR_OK;
        // Init the seeked file offset
        m_ulRequestedFileOffset = 0;
        // Set the state
        m_ulState = kStateGSHSeekDonePending;
        // Seek the file object to the beginning
        m_pFileObject->Seek(m_ulRequestedFileOffset, FALSE);
    }

    if (FAILED(retVal) && m_pFormatResponse)
    {
        m_pFormatResponse->StreamHeaderReady(retVal, NULL);
    }

    return retVal;
}

STDMETHODIMP CCommonImageFileFormat::GetPacket(UINT16 usStreamNum)
{
    HX_RESULT retVal = HXR_UNEXPECTED;

    if (m_ulState == kStateReady && usStreamNum == 0)
    {
        // Clear the return value
        retVal = HXR_OK;
        // Are we already at the desired file offset?
        if (m_ulDesiredFileOffset == m_ulFileOffset)
        {
            // Set the state
            m_ulState = kStateGPReadDonePending;
            // Read kPacketSize bytes
            HX_RESULT res = m_pFileObject->Read(kPacketSize);
            if( HXR_FAIL == res) 
            {
                //All the data has been read.
                ReadDone(HXR_FAIL, NULL );
            }
        }
        else
        {
            // Set the state
            m_ulState = kStateGPSeekDonePending;
            // Save the value we are trying to seek to
            m_ulRequestedFileOffset = m_ulDesiredFileOffset;
            // Seek to the desired file offset
            m_pFileObject->Seek(m_ulRequestedFileOffset, FALSE);
        }
    }

    if (FAILED(retVal) && m_pFormatResponse)
    {
        m_pFormatResponse->StreamDone(0);
    }

    return retVal;