dllentry.c

mpeg4 video codec mpeg4 video codec

/*
 * DllEntry point functions for ffmpeg encoder and decoder
 * Copyright (c) 2004 Andrew Ivanov <[e-mail]>.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/**
 * @file dllentry.c
 */


#include <windows.h>
#include <winbase.h>

#include "libavcodec/avcodec.h"
#include "../compiler.h"

CRITICAL_SECTION g_csStaticDataLock;

static int g_nEntryCount = 0;

void g_InitLock()
{
	if (0 == g_nEntryCount) {
		InitializeCriticalSection( &g_csStaticDataLock );
	}

	g_nEntryCount ++;
	
}

void g_UnInitLock()
{
	g_nEntryCount --;
	if (g_nEntryCount <= 0) {
		//av_free_static();
		DeleteCriticalSection( &g_csStaticDataLock );
	}
	
}

void g_Lock()
{
	 EnterCriticalSection( &g_csStaticDataLock );
}

void g_UnLock()
{
	 LeaveCriticalSection( &g_csStaticDataLock );
}

// --- standard WIN32 entrypoints --------------------------------------
BOOL WINAPI DllEntryPoint(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
 static int count=0;
 char pomS[40];
 switch (dwReason)
  {
   case DLL_PROCESS_ATTACH:
    count++;
    //snprintf(pomS,40,"libavcodec: %i %i\n",count,hInstance);OutputDebugString(pomS);
    DisableThreadLibraryCalls(hInstance);
    g_InitLock();
    break;
   case DLL_PROCESS_DETACH:
    count--;
    //snprintf(pomS,40,"libavcodec: %i %i\n",count,hInstance);OutputDebugString(pomS);
    /*if (count<=0)
     av_free_static();
    DeleteCriticalSection( &g_csStaticDataLock );*/
	g_UnInitLock();
    break;
  }
 return TRUE;
}

static char av_datetime[]=__DATE__" "__TIME__;
void getVersion(char **version,char **build,char **datetime,const char* *license)
{
 if (version) *version=AV_STRINGIFY(LIBAVCODEC_VERSION)", "COMPILER;
 if (build) *build=AV_STRINGIFY(LIBAVCODEC_BUILD);
 if (datetime) *datetime=av_datetime;
 if (license) *license="";
}