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vlc/plugins/fb/intf_fb.c

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/*****************************************************************************
* intf_fb.c: Linux framebuffer interface plugin
*****************************************************************************
* Copyright (C) 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "defs.h"
#include <errno.h> /* errno */
#include <signal.h> /* SIGUSR1, SIGUSR2 */
#include <stdlib.h> /* free() */
#include <string.h> /* strerror() */
#include <unistd.h> /* read() */
#include <sys/ioctl.h> /* ioctl() */
#include <sys/types.h> /* on BSD, uio.h needs types.h */
#include <sys/uio.h> /* for input.h */
#include <termios.h> /* struct termios */
#include <linux/vt.h> /* VT_* */
#include <linux/kd.h> /* KD* */
#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "plugins.h"
#include "stream_control.h"
#include "input_ext-intf.h"
#include "video.h"
#include "video_output.h"
#include "intf_msg.h"
#include "interface.h"
#include "main.h"
/*****************************************************************************
* intf_sys_t: description and status of FB interface
*****************************************************************************/
typedef struct intf_sys_s
{
/* System informations */
int i_tty_dev; /* tty device handle */
/* Original configuration informations */
struct sigaction sig_usr1; /* USR1 previous handler */
struct sigaction sig_usr2; /* USR2 previous handler */
struct vt_mode vt_mode; /* previous VT mode */
int i_width; /* width of main window */
int i_height; /* height of main window */
struct termios old_termios;
struct termios new_termios;
} intf_sys_t;
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static void FBSwitchDisplay ( int i_signal );
static void FBTextMode ( int i_tty_dev );
static void FBGfxMode ( int i_tty_dev );
/*****************************************************************************
* intf_FBCreate: initialize and create window
*****************************************************************************/
int intf_FBCreate( intf_thread_t *p_intf )
{
struct sigaction sig_tty; /* sigaction for tty change */
struct vt_mode vt_mode; /* vt current mode */
/* Allocate instance and initialize some members */
p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
if( p_intf->p_sys == NULL )
{
return( 1 );
};
intf_DbgMsg("0x%x\n", p_intf );
/* Set tty and fb devices */
p_intf->p_sys->i_tty_dev = 0; /* 0 == /dev/tty0 == current console */
FBGfxMode( p_intf->p_sys->i_tty_dev );
/* set keyboard settings */
if (tcgetattr(0, &p_intf->p_sys->old_termios) == -1)
{
intf_ErrMsg( "intf error: tcgetattr" );
}
if (tcgetattr(0, &p_intf->p_sys->new_termios) == -1)
{
intf_ErrMsg( "intf error: tcgetattr" );
}
p_intf->p_sys->new_termios.c_lflag &= ~ (ICANON | ISIG);
p_intf->p_sys->new_termios.c_lflag |= (ECHO | ECHOCTL);
p_intf->p_sys->new_termios.c_iflag = 0;
p_intf->p_sys->new_termios.c_cc[VMIN] = 1;
p_intf->p_sys->new_termios.c_cc[VTIME] = 0;
if (tcsetattr(0, TCSAFLUSH, &p_intf->p_sys->new_termios) == -1)
{
intf_ErrMsg( "intf error: tcsetattr" );
}
ioctl(p_intf->p_sys->i_tty_dev, VT_RELDISP, VT_ACKACQ);
/* Set-up tty signal handler to be aware of tty changes */
memset( &sig_tty, 0, sizeof( sig_tty ) );
sig_tty.sa_handler = FBSwitchDisplay;
sigemptyset( &sig_tty.sa_mask );
if( sigaction( SIGUSR1, &sig_tty, &p_intf->p_sys->sig_usr1 ) ||
sigaction( SIGUSR2, &sig_tty, &p_intf->p_sys->sig_usr2 ) )
{
intf_ErrMsg( "intf error: can't set up signal handler (%s)\n",
strerror(errno) );
tcsetattr(0, 0, &p_intf->p_sys->old_termios);
FBTextMode( p_intf->p_sys->i_tty_dev );
return( 1 );
}
/* Set-up tty according to new signal handler */
if( ioctl(p_intf->p_sys->i_tty_dev, VT_GETMODE, &p_intf->p_sys->vt_mode)
== -1 )
{
intf_ErrMsg( "intf error: cant get terminal mode (%s)\n",
strerror(errno) );
sigaction( SIGUSR1, &p_intf->p_sys->sig_usr1, NULL );
sigaction( SIGUSR2, &p_intf->p_sys->sig_usr2, NULL );
tcsetattr(0, 0, &p_intf->p_sys->old_termios);
FBTextMode( p_intf->p_sys->i_tty_dev );
return( 1 );
}
memcpy( &vt_mode, &p_intf->p_sys->vt_mode, sizeof( vt_mode ) );
vt_mode.mode = VT_PROCESS;
vt_mode.waitv = 0;
vt_mode.relsig = SIGUSR1;
vt_mode.acqsig = SIGUSR2;
if( ioctl(p_intf->p_sys->i_tty_dev, VT_SETMODE, &vt_mode) == -1 )
{
intf_ErrMsg( "intf error: can't set terminal mode (%s)\n",
strerror(errno) );
sigaction( SIGUSR1, &p_intf->p_sys->sig_usr1, NULL );
sigaction( SIGUSR2, &p_intf->p_sys->sig_usr2, NULL );
tcsetattr(0, 0, &p_intf->p_sys->old_termios);
FBTextMode( p_intf->p_sys->i_tty_dev );
return( 1 );
}
/* Spawn video output thread */
if( p_main->b_video )
{
p_intf->p_vout = vout_CreateThread( NULL, 0,
p_intf->p_sys->i_width,
p_intf->p_sys->i_height,
NULL, 0, NULL );
if( p_intf->p_vout == NULL ) /* XXX?? error */
{
intf_ErrMsg("intf error: can't create output thread\n" );
ioctl( p_intf->p_sys->i_tty_dev, VT_SETMODE,
&p_intf->p_sys->vt_mode );
sigaction( SIGUSR1, &p_intf->p_sys->sig_usr1, NULL );
sigaction( SIGUSR2, &p_intf->p_sys->sig_usr2, NULL );
free( p_intf->p_sys );
tcsetattr(0, 0, &p_intf->p_sys->old_termios);
FBTextMode( p_intf->p_sys->i_tty_dev );
return( 1 );
}
}
/* bind keys */
intf_AssignNormalKeys( p_intf );
return( 0 );
}
/*****************************************************************************
* intf_FBDestroy: destroy interface window
*****************************************************************************/
void intf_FBDestroy( intf_thread_t *p_intf )
{
/* resets the keyboard state */
tcsetattr(0, 0, &p_intf->p_sys->old_termios);
/* return to text mode */
FBTextMode( p_intf->p_sys->i_tty_dev );
/* Close input thread, if any (blocking) */
if( p_intf->p_input )
{
input_DestroyThread( p_intf->p_input, NULL );
}
/* Close video output thread, if any (blocking) */
if( p_intf->p_vout )
{
vout_DestroyThread( p_intf->p_vout, NULL );
}
/* Destroy structure */
free( p_intf->p_sys );
}
/*****************************************************************************
* intf_FBManage: event loop
*****************************************************************************/
void intf_FBManage( intf_thread_t *p_intf )
{
unsigned char buf[16];
//while ( read(0, buf, 1) == 1)
if ( read(0, buf, 1) == 1)
{
if( intf_ProcessKey(p_intf, (int)buf[0]) )
{
intf_ErrMsg("unhandled key '%c' (%i)\n", (char) buf[0], buf[0] );
}
}
}
/*****************************************************************************
* FBSwitchDisplay: VT change signal handler
*****************************************************************************
* This function activates or deactivates the output of the thread. It is
* called by the VT driver, on terminal change.
*****************************************************************************/
static void FBSwitchDisplay(int i_signal)
{
if( p_main->p_intf->p_vout != NULL )
{
switch( i_signal )
{
case SIGUSR1: /* vt has been released */
p_main->p_intf->p_vout->b_active = 0;
ioctl( ((intf_sys_t *)p_main->p_intf->p_sys)->i_tty_dev,
VT_RELDISP, 1 );
break;
case SIGUSR2: /* vt has been acquired */
p_main->p_intf->p_vout->b_active = 1;
ioctl( ((intf_sys_t *)p_main->p_intf->p_sys)->i_tty_dev,
VT_RELDISP, VT_ACTIVATE );
/* handle blanking */
p_main->p_intf->p_vout->i_changes |= VOUT_SIZE_CHANGE;
break;
}
}
}
/*****************************************************************************
* FBTextMode and FBGfxMode : switch tty to text/graphic mode
*****************************************************************************
* These functions toggle the tty mode.
*****************************************************************************/
static void FBTextMode( int i_tty_dev )
{
/* return to text mode */
if (-1 == ioctl(i_tty_dev, KDSETMODE, KD_TEXT))
{
intf_ErrMsg("intf error: ioctl KDSETMODE\n");
}
}
static void FBGfxMode( int i_tty_dev )
{
/* switch to graphic mode */
if (-1 == ioctl(i_tty_dev, KDSETMODE, KD_GRAPHICS))
{
intf_ErrMsg("intf error: ioctl KDSETMODE\n");
}
}
/*****************************************************************************
* vout_SysPrint: print simple text on a picture
*****************************************************************************
* This function will print a simple text on the picture. It is designed to
* print debugging or general informations, not to render subtitles.
*****************************************************************************/
void vout_SysPrint( vout_thread_t *p_vout, int i_x, int i_y, int i_halign,
int i_valign, unsigned char *psz_text )
{
}
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