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/*****************************************************************************
* plugins.c : Dynamic plugin management functions
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
*
* Authors:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#include "defs.h"
#include "config.h"
#include <stdlib.h> /* free(), strtol() */
#include <stdio.h> /* sprintf() */
#include <string.h> /* strerror() */
#include <errno.h> /* ENOMEM */
#if defined(HAVE_DLFCN_H) /* Linux, BSD, Hurd */
#include <dlfcn.h> /* dlopen(), dlsym(), dlclose() */
#elif defined(HAVE_IMAGE_H) /* BeOS */
#include <image.h>
#else
#error no dynamic plugins available on your system !
#endif
#ifdef SYS_BEOS
#include "beos_specific.h"
#endif
#include "common.h"
#include "intf_msg.h"
#include "plugins.h"
/* Local prototypes */
char * TestPlugin ( plugin_id_t *p_plugin_id, char * psz_name );
int AllocatePlugin ( plugin_id_t plugin_id, plugin_bank_t * p_bank,
char * psz_filename );
plugin_bank_t * bank_Create( void )
{
plugin_bank_t *p_bank;
int i;
/* Allocate structure */
p_bank = malloc( sizeof( plugin_bank_t ) );
if( !p_bank )
{
intf_ErrMsg("plugin bank error: %s\n", strerror( ENOMEM ) );
return( NULL );
}
/* Initialize structure */
for( i = 0 ; i < MAX_PLUGIN_COUNT ; i++ )
{
p_bank->p_info[ i ] = NULL;
}
p_bank->i_plugin_count = MAX_PLUGIN_COUNT;
intf_Msg("Plugin bank initialized\n");
return( p_bank );
}
void bank_Init( plugin_bank_t * p_bank )
{
plugin_id_t tmp;
char * psz_filename;
/* FIXME: we should browse all directories to get plugins */
#define SEEK_PLUGIN( name ) \
psz_filename = TestPlugin( &tmp, name ); \
if( psz_filename ) AllocatePlugin( tmp, p_bank, psz_filename );
SEEK_PLUGIN( "beos" );
SEEK_PLUGIN( "x11" );
SEEK_PLUGIN( "dsp" );
SEEK_PLUGIN( "gnome" );
SEEK_PLUGIN( "ggi" );
SEEK_PLUGIN( "fb" );
SEEK_PLUGIN( "yuvmmx" );
SEEK_PLUGIN( "yuv" );
SEEK_PLUGIN( "dummy" );
#undef SEEK_PLUGIN
}
void bank_Destroy( plugin_bank_t * p_bank )
{
free( p_bank );
}
/*
* Following functions are local
*/
int AllocatePlugin( plugin_id_t plugin_id, plugin_bank_t * p_bank,
char * psz_filename )
{
typedef plugin_info_t * ( get_config_t ) ( void );
get_config_t * p_func;
int i;
for( i = 0 ; i < p_bank->i_plugin_count ; i++ )
{
if( p_bank->p_info[ i ] == NULL )
{
break;
}
}
/* no room to store that plugin, quit */
if( i == p_bank->i_plugin_count )
{
intf_ErrMsg( "plugin bank error: reached max plugin count (%i), "
"increase MAX_PLUGIN_COUNT\n", p_bank->i_plugin_count );
return( -1 );
}
/* system-specific dynamic symbol loading */
GET_PLUGIN( p_func, plugin_id, "GetConfig" );
/* if it failed, just quit */
if( !p_func )
{
return( -1 );
}
/* run the plugin function to initialize the structure */
p_bank->p_info[ i ] = p_func( );
p_bank->p_info[ i ]->plugin_id = plugin_id;
/* Tell the world we found it */
intf_Msg( "Found plugin: %s (version %s)\n", p_bank->p_info[ i ]->psz_name,
p_bank->p_info[ i ]->psz_version );
/* return nicely */
return( 0 );
}
char * TestPlugin ( plugin_id_t *p_plugin_id, char * psz_name )
{
int i_count, i_length;
char * psz_plugin;
char * psz_plugin_path[ ] =
{
".",
"lib", /* this one should disappear */
PLUGIN_PATH,
NULL
};
i_length = strlen( psz_name );
for ( i_count = 0 ; psz_plugin_path[ i_count ] ; i_count++ )
{
#ifdef SYS_BEOS
char * psz_program_path;
psz_program_path = beos_GetProgramPath();
psz_plugin = malloc( strlen(psz_plugin_path[i_count]) +
strlen(psz_program_path) + i_length + 5 );
sprintf( psz_plugin, "%s/%s/%s.so", psz_program_path,
psz_plugin_path[i_count], psz_name );
*p_plugin_id = load_add_on( psz_plugin );
#else
psz_plugin = malloc( strlen(psz_plugin_path[i_count]) + i_length + 5 );
sprintf( psz_plugin, "%s/%s.so", psz_plugin_path[i_count], psz_name );
*p_plugin_id = dlopen( psz_plugin, RTLD_NOW | RTLD_GLOBAL );
#endif
#ifdef SYS_BEOS
if( *p_plugin_id >= 0 )
#else
if( *p_plugin_id != NULL )
#endif
{
/* plugin successfuly dlopened */
return( psz_plugin );
}
#ifndef SYS_BEOS
else
{
intf_DbgMsg( "%s\n", dlerror() );
}
#endif
free( psz_plugin );
}
return( NULL );
}
#if 0
void TrashPlugin ( plugin_id_t plugin_id )
{
#ifdef SYS_BEOS
unload_add_on( plugin_id );
#else
dlclose( plugin_id );
#endif
}
#endif