Commit a68b8131 authored by Filippo Carone's avatar Filippo Carone

callback.c added (ops)

parent 84e196b9
/*****************************************************************************
* libvlc_callback.c: New libvlc callback control API
*****************************************************************************
* Copyright (C) 2007 the VideoLAN team
* $Id $
*
* Authors: Filippo Carone <filippo@carone.org>
*
* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#include "libvlc_internal.h"
#include <vlc/libvlc.h>
int libvlc_private_handle_callback( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval,
void *p_data );
void libvlc_callback_register_for_event( libvlc_instance_t *p_instance,
libvlc_event_type_t i_event_type,
libvlc_callback_t f_callback,
void *user_data,
libvlc_exception_t *p_e )
{
if ( ! &f_callback )
RAISEVOID (" Callback function is null ");
struct libvlc_callback_entry_t *entry = malloc( sizeof( struct libvlc_callback_entry_t ) );
entry->f_callback = f_callback;
entry->i_event_type = i_event_type;
entry->p_user_data = user_data;
const char *callback_name;
switch ( i_event_type )
{
case VOLUME_CHANGED:
callback_name = "volume-change";
break;
case INPUT_POSITION_CHANGED:
break;
default:
free( entry );
RAISEVOID( "Unsupported event." );
}
int res = var_AddCallback( p_instance->p_libvlc_int,
callback_name,
libvlc_private_handle_callback,
entry );
if (res != VLC_SUCCESS)
{
free ( entry );
RAISEVOID("Internal callback registration was not successful. Callback not registered.");
}
add_callback_entry( entry, &p_instance->p_callback_list );
return;
}
void libvlc_callback_unregister_for_event( libvlc_instance_t *p_instance,
libvlc_event_type_t i_event_type,
libvlc_callback_t f_callback,
void *p_user_data,
libvlc_exception_t *p_e )
{
struct libvlc_callback_entry_list_t *p_listitem = p_instance->p_callback_list;
while( p_listitem )
{
if( p_listitem->elmt->f_callback == f_callback
&& ( p_listitem->elmt->i_event_type == i_event_type )
&& ( p_listitem->elmt->p_user_data == p_user_data )
)
{
if( p_listitem->prev )
p_listitem->prev->next = p_listitem->next;
else
p_instance->p_callback_list = p_listitem->next;
p_listitem->next->prev = p_listitem->prev;
free( p_listitem );
break;
}
p_listitem = p_listitem->next;
}
}
int libvlc_private_handle_callback( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval,
void *p_data )
{
struct libvlc_callback_entry_t *entry = p_data;
libvlc_event_t event;
event.type = entry->i_event_type;
/* Call the client entry */
entry->f_callback( entry->p_instance, &event, entry->p_user_data );
return VLC_SUCCESS;
}
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