pxgifff.cpp

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/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: pxgifff.cpp,v 1.3.16.1 2004/07/09 01:54:22 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 ***** */

// system
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// include
#include "hxtypes.h"
#include "hxcom.h"
#include "hxcomm.h"
#include "ihxpckts.h"
#include "hxfiles.h"
#include "hxformt.h"
#include "hxplugn.h"
#include "hxver.h"
#include "hxerror.h"
#include "hxxres.h"
#include "hxxrsmg.h"
#include "ihxfgbuf.h"
#include "hxvsrc.h"
#include "hxengin.h"
#ifdef _MACINTOSH
#include <ctype.h>
#endif
// pncont
#include "hxstring.h"
#include "hxslist.h"
#include "chxpckts.h"
#include "chxfgbuf.h"
// pnmisc
#include "hxurl.h"
#include "unkimp.h"
#include "baseobj.h"
#ifdef _AIX
#include "dllpath.h"
ENABLE_MULTILOAD_DLLACCESS_PATHS(Pxgifff);
#endif
// pxcomlib
#include "gstring.h"
#include "pxutil.h"
#include "pxcolor.h"
#include "parseurl.h"
#include "buffutil.h"
// pxgiflib
#include "lzw.h"
#include "gifimage.h"
#include "gifcodec.h"
// coreres
#include "pixres.h"
// pxgifff
#if defined(HELIX_FEATURE_VIEWSOURCE)
#include "gifvsrc.h"
#endif /* #if defined(HELIX_FEATURE_VIEWSOURCE) */
#include "pxgifff.h"
#include "giffdll.ver"
// pndebug
#include "errdbg.h"
#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif

#define BASE_GIFSTREAM_VERSION    HX_ENCODE_PROD_VERSION(0, 0, 0, 0)
#define MEDREP_GIFSTREAM_VERSION  HX_ENCODE_PROD_VERSION(0, 1, 0, 0)

const char * const CGIFFileFormat::m_pszDescription       = "Helix GIF File Format Plugin";
const char * const CGIFFileFormat::m_pszCopyright         = HXVER_COPYRIGHT;
const char * const CGIFFileFormat::m_pszMoreInfoURL       = HXVER_MOREINFO;
const char * const CGIFFileFormat::m_ppszFileMimeTypes[]  = {"image/gif", NULL};
const char * const CGIFFileFormat::m_ppszFileExtensions[] = {"gif", NULL};
const char * const CGIFFileFormat::m_ppszFileOpenNames[]  = {"GIF File Format (*.gif)", NULL};
const char * const CGIFFileFormat::m_pszStreamMimeType    = "application/vnd.rn-gifstream2";
const char * const CGIFFileFormat::m_pszBadStreamMimeType = "application/vnd.rn-gifstream3";
const UINT32 CGIFFileFormat::m_ulContentVersion     = HX_ENCODE_PROD_VERSION(0, 0, 0, 0);
const UINT32 CGIFFileFormat::m_ulStreamVersion      = BASE_GIFSTREAM_VERSION;

#ifdef _WINDOWS
extern HINSTANCE g_hInstance;
#endif

CGIFFileFormat::CGIFFileFormat()
{
    m_lRefCount            = 0;
    m_pContext             = NULL;
    m_pFileObject          = NULL;
    m_pFileStat            = NULL;
    m_pFormatResponse      = NULL;
    m_pCommonClassFactory  = NULL;
    m_pError               = NULL;
    m_ulBitRate            = 0;
    m_ulPreroll            = 0;
    m_ulDuration           = 0;
    m_pURL                 = NULL;
    m_pRequestURL          = NULL;
    m_ulSeekTime           = 0;
    m_ucTarget             = kTargetBrowser;
    m_ucURLType            = kURLTypeNormal;
    m_lCurrentTime         = 0;
    m_plImageStartTime     = NULL;
    m_lCurImgIndex         = 0;
    m_ulState              = kStateConstructed;
    m_ulFileSize           = 0;
    m_pGIFCodec            = NULL;
    m_bReliable            = FALSE;
    m_ulNumBytesRead       = 0;
    m_pFileBuffer          = NULL;
    m_pFragFileBuffer      = NULL;
    m_ppPacket             = NULL;
    m_ulNumPackets         = 0;
    m_ulCurrentPacketIndex = 0;
    m_bParseFailed         = FALSE;
    m_pMediaRepeatStr      = NULL;
}

CGIFFileFormat::~CGIFFileFormat()
{ 
    Close();
}

STDMETHODIMP CGIFFileFormat::QueryInterface(REFIID riid, void **ppvObj)
{
    if (IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = (IUnknown *) (IHXPlugin *) this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXPlugin))
    {
        AddRef();
        *ppvObj = (IHXPlugin *) this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXFileFormatObject))
    {
        AddRef();
        *ppvObj = (IHXFileFormatObject *) this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXFileResponse))
    {
        AddRef();
        *ppvObj = (IHXFileResponse *) this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXFileStatResponse))
    {
        AddRef();
        *ppvObj = (IHXFileStatResponse *) this;
        return HXR_OK;
    }
#if defined(HELIX_FEATURE_VIEWSOURCE)
    else if (IsEqualIID(riid, IID_IHXFileViewSource))
    {
	CGIFViewSource* pVsrc = new CGIFViewSource(m_pContext,
		(IUnknown*)(IHXPlugin*)this);
	if ( pVsrc == NULL )
	{
	    return HXR_FAIL;
	}
	return pVsrc->QueryInterface(riid, ppvObj);
    }
#endif /* #if defined(HELIX_FEATURE_VIEWSOURCE) */
    else if (IsEqualIID(riid, IID_IHXThreadSafeMethods))
    {
	AddRef();
	*ppvObj = (IHXThreadSafeMethods*)this;
	return HXR_OK;
    }

    *ppvObj = NULL;

    return HXR_NOINTERFACE;
}

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

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

    delete this;

    return 0;
}

STDMETHODIMP CGIFFileFormat::GetPluginInfo(REF(BOOL)        bMultipleLoad,
                                           REF(const char*) pDescription,
                                           REF(const char*) pCopyright,
                                           REF(const char*) pMoreInfoURL,
                                           REF(ULONG32)     ulVersionNumber)
{
    bMultipleLoad   = TRUE;   // Must be true for file formats.
    pDescription    = m_pszDescription;
    pCopyright      = m_pszCopyright;
    pMoreInfoURL    = m_pszMoreInfoURL;
    ulVersionNumber = TARVER_ULONG32_VERSION;

    return HXR_OK;
}

STDMETHODIMP CGIFFileFormat::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 CGIFFileFormat::InitPlugin(IUnknown *pContext)
{
    // Check for input error
    if (pContext == NULL)
    {
        return HXR_INVALID_PARAMETER;
    }

    // Save a copy of the context
    m_pContext = pContext;
    m_pContext->AddRef();

    // Get an IHXCommonClassFactory interface from the context
    HX_RELEASE(m_pCommonClassFactory);
    HX_RESULT retVal = m_pContext->QueryInterface(IID_IHXCommonClassFactory, (void **) &m_pCommonClassFactory);
    if (retVal != HXR_OK)
    {
        HX_RELEASE(m_pContext);
        return HXR_NOINTERFACE;
    }

    // Get the IHXErrorMessages interface
    // It's OK if TLC doesn't support it.
    HX_RELEASE(m_pError);
    m_pContext->QueryInterface(IID_IHXErrorMessages, (void **) &m_pError);

    return HXR_OK;
}

STDMETHODIMP CGIFFileFormat::InitFileFormat(IHXRequest        *pRequest,
                                            IHXFormatResponse *pFormatResponse,
                                            IHXFileObject     *pFileObject)
{
#ifdef XXXMEH_DEBUG_LOG
    const char* pszURLDbg = NULL;
    pRequest->GetURL(pszURLDbg);
    DEBUG_OUTF("pxgifff.log", (s, "0x%08x::InitFileFormat(): %s\n", this, pszURLDbg));
#endif
    // Check for input error
    if (pRequest == NULL || pFormatResponse == NULL || pFileObject == NULL)
    {
        return HXR_INVALID_PARAMETER;
    }

    // Check state
    if (m_ulState != kStateConstructed)
    {
        return HXR_UNEXPECTED;
    }

    // Save a copy of the IHXFormatResponse
    m_pFormatResponse = pFormatResponse;
    m_pFormatResponse->AddRef();

    // Get the URL string from the IHXRequest object
    const char *pszURL = NULL;
    HX_RESULT   retVal = pRequest->GetURL(pszURL);
    if (retVal != HXR_OK)
    {
        return m_pFormatResponse->InitDone(retVal);
    }
    if (pszURL)
    {
        HX_DELETE(m_pRequestURL);
        m_pRequestURL = new CHXString(pszURL);
    }

    // Create an IHXValues object to hold the param name/value pairs
    IHXValues *pValues = NULL;
    retVal = m_pCommonClassFactory->CreateInstance(CLSID_IHXValues, (void**) &pValues);
    if (FAILED(retVal))
    {
        return m_pFormatResponse->InitDone(retVal);
    }
    // Now add the following parameters to the IHXValues. These
    // parameters could have come as URL-encoded parameters or as
    // parameters in the request headers. These parameters will be
    // added as CString properties to the IHXValues.
    AddURLOrRequestParam(pRequest, "bitrate",                 m_pContext, pValues);
    AddURLOrRequestParam(pRequest, "duration",                m_pContext, pValues);
    AddURLOrRequestParam(pRequest, "preroll",                 m_pContext, pValues);
    AddURLOrRequestParam(pRequest, "url",                     m_pContext, pValues);
    AddURLOrRequestParam(pRequest, "target",                  m_pContext, pValues);
    AddURLOrRequestParam(pRequest, "bgcolor",                 m_pContext, pValues);
    AddURLOrRequestParam(pRequest, "reliable",                m_pContext, pValues);
    AddURLOrRequestParam(pRequest, "mediaRepeat",             m_pContext, pValues);

    // Set the bitrate
    retVal = ExtractValueUINT32(pValues, "bitrate", kDefaultBitRate, m_ulBitRate);
    if (retVal != HXR_OK)
    {
        HX_RELEASE(pValues);
        ReportError(IDS_ERR_GIF_BADBITRATE);
        return m_pFormatResponse->InitDone(retVal);
    }
    // Set the duration
    retVal = ExtractValueTime(pValues, "duration", kDefaultDuration, m_ulDuration);
    if (retVal != HXR_OK)
    {
        HX_RELEASE(pValues);
        ReportError(IDS_ERR_GIF_BADDURATION);
        return m_pFormatResponse->InitDone(retVal);
    }
    // Set the preroll
    retVal = ExtractValueTime(pValues, "preroll", 0, m_ulPreroll);
    if (retVal != HXR_OK)
    {
        HX_RELEASE(pValues);
        ReportError(IDS_ERR_GIF_BADPREROLL);
        return m_pFormatResponse->InitDone(retVal);
    }
    // Set the URL
    CHXString cTmp;
    retVal = ExtractValueString(pValues, "url", NULL, cTmp);
    if (retVal != HXR_OK)
    {
        HX_RELEASE(pValues);