interface.c

video linux conference

/*****************************************************************************
 * interface.c: interface access for other threads
 * This library provides basic functions for threads to interact with user
 * interface, such as command line.
 *****************************************************************************
 * Copyright (C) 1998-2004 VideoLAN
 * $Id: interface.c 10147 2005-03-05 17:18:30Z gbazin $
 *
 * Authors: Vincent Seguin <[e-mail]>
 *
 * 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.
 *****************************************************************************/

/**
 *   \file
 *   This file contains functions related to interface management
 */


/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* free(), strtol() */
#include <stdio.h>                                                   /* FILE */
#include <string.h>                                            /* strerror() */

#include <vlc/vlc.h>
#include <vlc/input.h>

#include "audio_output.h"

#include "vlc_interface.h"
#include "vlc_video.h"
#include "video_output.h"

#ifdef SYS_DARWIN
#    include "Cocoa/Cocoa.h"
#endif /* SYS_DARWIN */

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static void Manager( intf_thread_t *p_intf );
static void RunInterface( intf_thread_t *p_intf );

static int SwitchIntfCallback( vlc_object_t *, char const *,
                               vlc_value_t , vlc_value_t , void * );
static int AddIntfCallback( vlc_object_t *, char const *,
                            vlc_value_t , vlc_value_t , void * );

#ifdef SYS_DARWIN
/*****************************************************************************
 * VLCApplication interface
 *****************************************************************************/
@interface VLCApplication : NSApplication
{
}

@end
#endif

/*****************************************************************************
 * intf_Create: prepare interface before main loop
 *****************************************************************************
 * This function opens output devices and creates specific interfaces. It sends
 * its own error messages.
 *****************************************************************************/
/**
 * Create the interface, and prepare it for main loop.
 *
 * \param p_this the calling vlc_object_t
 * \param psz_module a prefered interface module
 * \return a pointer to the created interface thread, NULL on error
 */
intf_thread_t* __intf_Create( vlc_object_t *p_this, const char *psz_module )
{
    intf_thread_t * p_intf;

    /* Allocate structure */
    p_intf = vlc_object_create( p_this, VLC_OBJECT_INTF );
    if( !p_intf )
    {
        msg_Err( p_this, "out of memory" );
        return NULL;
    }
    p_intf->pf_request_window = NULL;
    p_intf->pf_release_window = NULL;
    p_intf->pf_control_window = NULL;
    p_intf->b_play = VLC_FALSE;

    /* Choose the best module */
    p_intf->p_module = module_Need( p_intf, "interface", psz_module, 0 );

    if( p_intf->p_module == NULL )
    {
        msg_Err( p_intf, "no suitable intf module" );
        vlc_object_destroy( p_intf );
        return NULL;
    }

    /* Initialize structure */
    p_intf->b_menu        = VLC_FALSE;
    p_intf->b_menu_change = VLC_FALSE;

    /* Initialize mutexes */
    vlc_mutex_init( p_intf, &p_intf->change_lock );

    msg_Dbg( p_intf, "interface initialized" );

    /* Attach interface to its parent object */
    vlc_object_attach( p_intf, p_this );

    return p_intf;
}

/*****************************************************************************
 * intf_RunThread: launch the interface thread
 *****************************************************************************
 * This function either creates a new thread and runs the interface in it,
 * or runs the interface in the current thread, depending on b_block.
 *****************************************************************************/
/**
 * Run the interface thread.
 *
 * If b_block is not set, runs the interface in the thread, else,
 * creates a new thread and runs the interface.
 * \param p_intf the interface thread
 * \return VLC_SUCCESS on success, an error number else
 */
int intf_RunThread( intf_thread_t *p_intf )
{
#ifdef SYS_DARWIN
    NSAutoreleasePool * o_pool;

    if( p_intf->b_block )
    {
        /* This is the primary intf */
        /* Run a manager thread, launch the interface, kill the manager */
        if( vlc_thread_create( p_intf, "manager", Manager,
                               VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
        {
            msg_Err( p_intf, "cannot spawn manager thread" );
            return VLC_EGENERIC;
        }
    }

    if( p_intf->b_block && strncmp( p_intf->p_module->psz_object_name,
                                    "clivlc", 6) )
    {
        o_pool = [[NSAutoreleasePool alloc] init];
        [VLCApplication sharedApplication];
    }

    if( p_intf->b_block &&
        ( !strncmp( p_intf->p_module->psz_object_name, "macosx" , 6 ) ||
          !strncmp( p_intf->p_vlc->psz_object_name, "clivlc", 6 ) ) )
    {
        /* VLC in normal primary interface mode */
        RunInterface( p_intf );
        p_intf->b_die = VLC_TRUE;
    }
    else
    {
        /* Run the interface in a separate thread */
        if( vlc_thread_create( p_intf, "interface", RunInterface,
                               VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
        {
            msg_Err( p_intf, "cannot spawn interface thread" );
            return VLC_EGENERIC;
        }

        if( p_intf->b_block )
        {
            /* VLC in primary interface mode with a working macosx vout */
            [NSApp run];
            p_intf->b_die = VLC_TRUE;
        }
    }
#else
    if( p_intf->b_block )
    {
        /* Run a manager thread, launch the interface, kill the manager */
        if( vlc_thread_create( p_intf, "manager", Manager,
                               VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
        {
            msg_Err( p_intf, "cannot spawn manager thread" );
            return VLC_EGENERIC;
        }

        RunInterface( p_intf );

        p_intf->b_die = VLC_TRUE;
        /* Do not join the thread... intf_StopThread will do it for us */
    }
    else
    {
        /* Run the interface in a separate thread */
        if( vlc_thread_create( p_intf, "interface", RunInterface,
                               VLC_THREAD_PRIORITY_LOW, VLC_FALSE ) )
        {
            msg_Err( p_intf, "cannot spawn interface thread" );
            return VLC_EGENERIC;
        }
    }
#endif

    return VLC_SUCCESS;
}

/**
 * Stops the interface thread
 *
 * This function asks the interface thread to stop
 * \param p_intf the interface thread
 * \return nothing
 */
void intf_StopThread( intf_thread_t *p_intf )
{
    /* Tell the interface to die */
    if( !p_intf->b_block )
    {
        p_intf->b_die = VLC_TRUE;
    }

    /* Wait for the thread to exit */
    vlc_thread_join( p_intf );