chxclientengineunix.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: CHXClientEngineUnix.cpp,v 1.16.2.3 2004/07/09 01:49:41 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 "CHXClientEngineUnix.h"
#include "hxassert.h"
#include "safestring.h"
#include "dllpath.h"
#include "hxwintyp.h"
#include <X11/Xlib.h>

// XXXNH: is there a better place to put this?
#define MAX_PATH    256

/*!
  @const kCreateEngine
  @abstract symbol name for the client engine creation func
*/
const char* const kCreateEngine = "CreateEngine";


/*!
  @const kCloseEngine
  @abstract symbol name for the client engine destruction func
*/
const char* const kCloseEngine = "CloseEngine";

/*!
  @const kClientCoreDll
  @abstract the name of the helix client core shared library on unix
*/
const char* const kClientCoreDll = "clntcore.so";

/*!
  @const kSetDll
  @abstract symbol name for the client engine's dll search path function
*/
const char* const kSetDll = "SetDLLAccessPath";

/*!
  @const kDllTypes
  @abstract names of common dll locations used by SetDLLAccessPath
*/
const char* const kDllTypes[] =
{
    "DT_Common", "DT_Plugins", "DT_Codecs"
};

/*!
  @const kDllDirs
  @abstract names of common dll directories used by SetDLLAccessPath
*/
const char* const kDllDirs[] =
{
    "common", "plugins", "codecs"
};

/*!
  @const kNumDllTypes
  @abstract number of dll location names used by SetDLLAccessPath
*/
const UINT32 kNumDllTypes = sizeof(kDllTypes) / sizeof(*kDllTypes);


ENABLE_DLLACCESS_PATHS(hxclient);


/*!
  @function CreatePlatformClientEngine
  @abstract create and return a new CHXClientEngineUnix
*/
CHXClientEngine* CreatePlatformClientEngine(void)
{
    return new CHXClientEngineUnix;
}

//typedef HX_RESULT (HXEXPORT_PTR FPRMSETDLLACCESSPATH) (const char*);


/*!
  @function ~CHXClientEngineUnix
  @abstract destructor
  @discussion unloads the client core
*/
CHXClientEngineUnix::~CHXClientEngineUnix(void)
{
    UnloadClientCore();
}


/*!
  @function CHXClientEngineUnix
  @abstract constructor
*/
CHXClientEngineUnix::CHXClientEngineUnix(void)
    : m_pICoreEngine(NULL)
{
}


/*!
  @function LoadClientCore
  @abstract load and initialize the helix client engine
*/
HX_RESULT
CHXClientEngineUnix::LoadClientCore(void)
{
    HX_RESULT res = HXR_OK;

    if (!m_dllHXCore.isOpen())
    {
	// See if the user has set their HELIX_LIBS env var
        char dllhome[MAX_PATH] = ".";
        const char* pszHelixLibs = getenv("HELIX_LIBS");
        if (pszHelixLibs)
            SafeStrCpy(dllhome, pszHelixLibs, MAX_PATH);
 
        char dllpath[MAX_PATH];
        SafeSprintf(dllpath, MAX_PATH, "%s/common/%s", dllhome, kClientCoreDll);

	if (m_dllHXCore.open(dllpath) != DLLAccess::DLL_OK)
	{
	    res = HXR_FAIL;
	}
    }
    
    return res;
}


/*!
  @function InitDLLAccessPaths
  @abstract initialize DLLAccess paths
  @discussion DLLAccess is a class used in Helix to easily load dlls and
  access their symbols.  The client engine typically expects to find certain
  types of dlls (eg: codecs, plugins) in certain locations.  The
  SetDLLAccessPath function is called to set these locations.
  InitDLLAccessPaths sets these locations to some reasonable defaults.
*/
HX_RESULT
CHXClientEngineUnix::InitDLLAccessPaths(void)
{
    HX_RESULT res = LoadClientCore();

    if (SUCCEEDED(res))
    {
	FPSETDLLACCESSPATH pfnSetDll;
	pfnSetDll = (FPSETDLLACCESSPATH)m_dllHXCore.getSymbol(kSetDll);
	if (pfnSetDll)
	{
	    // See if the user has set their HELIX_LIBS env var
	    char dllhome[MAX_PATH] = ".";
	    const char* pszHelixLibs = getenv("HELIX_LIBS");
	    if (pszHelixLibs)
		SafeStrCpy(dllhome, pszHelixLibs, MAX_PATH);
	    
	    char paths[MAX_PATH * kNumDllTypes];
	    int nLen = sizeof(paths) / sizeof(char);
	    char* pPath = paths;
	    for (unsigned int i = 0; i != kNumDllTypes; ++i)
	    {
		int nSize = SafeSprintf(pPath, nLen, "%s=%s/%s",
                                        kDllTypes[i], dllhome, kDllDirs[i]);

                nSize++; // Skip over the '\0'                
		pPath += nSize;
		nLen -= nSize;
		
		HX_ASSERT(nLen >= 0);
	    }
	    *pPath = 0;
	    
	    pfnSetDll(paths);
	}
    }
    return res;
}


/*!
  @function OnCreateClientEngine
  @abstract create and return an IHXClientEngine
*/
IHXClientEngine*
CHXClientEngineUnix::OnCreateClientEngine(HX_RESULT* pResult)
{
    *pResult = HXR_OK;
    if (!m_pICoreEngine)
    {
	*pResult = InitDLLAccessPaths();
	if (SUCCEEDED(*pResult))
	{
	    FPRMCREATEENGINE pCreateEngine =
		(FPRMCREATEENGINE)m_dllHXCore.getSymbol(kCreateEngine);
	    if (pCreateEngine)
	    {
		*pResult = pCreateEngine(&m_pICoreEngine);
		// If engine was not created, we should receive a reason.
		HX_ASSERT((NULL != m_pICoreEngine) || (FAILED(*pResult)));
	    }
	    else
	    {
		*pResult = HXR_COULDNOTINITCORE;
	    }
	}
    }
    return m_pICoreEngine;
}


/*!
  @function GetClientEngine
  @abstract return the IHXClientEngine
*/
IHXClientEngine*
CHXClientEngineUnix::GetClientEngine(void)
{
    return m_pICoreEngine;
}


/*!
  @function OnCloseClientEngine
  @abstract destroy the IHXClientEngine and unload the client core
*/
void
CHXClientEngineUnix::OnCloseClientEngine(void)
{
    if (m_pICoreEngine)
    {
	HX_ASSERT(m_dllHXCore.isOpen());
	FPRMCLOSEENGINE pCloseEngine =
	    (FPRMCLOSEENGINE)m_dllHXCore.getSymbol(kCloseEngine);
	if (pCloseEngine)
	{
	    pCloseEngine(m_pICoreEngine);
	}
	m_pICoreEngine = NULL;
    }
}


/*!
  @function UnloadClientCore
  @abstract shutdown the engine and unload the client core dll
*/
void
CHXClientEngineUnix::UnloadClientCore(void)
{
    if (m_dllHXCore.isOpen())
    {
	OnCloseClientEngine();
	
	m_dllHXCore.close();
    }
}


extern "C"
{


/*!
  @function ClientEngineProcessXEvent
  @abstract pump a message to the client engine
  @discussion In order for the client engine to function properly it needs
  to be given XEvents for any XWindows that it is using for display.  It
  also must be given time to do processing, so the application event loop
  should periodically call this function and pass in NULL.  (For example,
  call this function during each iteration of your top-level message loop.)
*/
bool
ClientEngineProcessXEvent(XEvent* pXEvent)
{
    IHXClientEngine* pIClientEngine = NULL;
    if (CHXClientEngine::GetEngine(&pIClientEngine))
    {
	HXxEvent event;
	HXxEvent* pEvent = &event;
	if (pXEvent)
	{
	    memset(&event, 0, sizeof(event));
	    event.event = pXEvent->type;
	    event.window = (void*)pXEvent->xany.window;
	    event.param1 = pXEvent->xany.display;
	    event.param2 = pXEvent;
	}
	else
	{
	    pEvent = NULL;
	}

#if 0
        if(pXEvent)
        {
            printf("Window %p Display %p Serial %d Event %d, ",
                   pXEvent->xany.window,
                   pXEvent->xany.display,
                   pXEvent->xany.serial,
                   pXEvent->xany.type);
            
            switch(pXEvent->type)
            {
                case  2:  printf("KeyPress\n"); break;
                case  3:  printf("KeyRelease\n"); break;
                case  4:  printf("ButtonPress\n"); break;            
                case  5:  printf("ButtonRelease\n"); break;          
                case  6:  printf("MotionNotify\n"); break;           
                case  7:  printf("EnterNotify\n"); break;            
                case  8:  printf("LeaveNotify\n"); break;            
                case  9:  printf("FocusIn\n"); break;                
                case  10: printf("FocusOut\n"); break;               
                case  11: printf("KeymapNotify\n"); break;           
                case  12: printf("Expose\n"); break;                 
                case  13: printf("GraphicsExpose\n"); break;         
                case  14: printf("NoExpose\n"); break;               
                case  15: printf("VisibilityNotify\n"); break;       
                case  16: printf("CreateNotify\n"); break;           
                case  17: printf("DestroyNotify\n"); break;          
                case  18: printf("UnmapNotify\n"); break;            
                case  19: printf("MapNotify\n"); break;              
                case  20: printf("MapRequest\n"); break;             
                case  21: printf("ReparentNotify\n"); break;         
                case  22: printf("ConfigureNotify\n"); break;        
                case  23: printf("ConfigureRequest\n"); break;       
                case  24: printf("GravityNotify\n"); break;          
                case  25: printf("ResizeRequest\n"); break;          
                case  26: printf("CirculateNotify\n"); break;        
                case  27: printf("CirculateRequest\n"); break;       
                case  28: printf("PropertyNotify\n"); break;         
                case  29: printf("SelectionClear\n"); break;         
                case  30: printf("SelectionRequest\n"); break;       
                case  31: printf("SelectionNotify\n"); break;        
                case  32: printf("ColormapNotify\n"); break;         
                case  33: printf("ClientMessage\n"); break;          
                case  34: printf("MappingNotify\n"); break;
                default:  printf("???\n"); break;
            }
	}
#endif
	
	pIClientEngine->EventOccurred(pEvent);
	HX_RELEASE(pIClientEngine);

	return TRUE;
    }
    return FALSE;
}

    
}