Commit 50bbdbfe authored by gbazin's avatar gbazin
Browse files

* modules/access/screen.c: new screen capture access module. Only X11 for now...

* modules/access/screen.c: new screen capture access module. Only X11 for now but should be straight-forward to adapt to other platforms.
parent e623637f
......@@ -1616,6 +1616,26 @@ then
CPPFLAGS="${CPPFLAGS_save}"
fi
dnl
dnl Screen capture module
dnl
AC_ARG_ENABLE(screen,
[ --enable-screen Screen capture support (default enabled)])
if test "${enable_screen}" != "no"; then
if test "${SYS}" != "mingw32"; then
CPPFLAGS="${CPPFLAGS_save} -I${x_includes}"
AC_CHECK_HEADERS(X11/Xlib.h, [
VLC_ADD_PLUGINS([screen])
VLC_ADD_LDFLAGS([screen],[-L${x_libraries} -lX11 -lXext])
VLC_ADD_CPPFLAGS([screen],[-I${x_includes}])
])
CPPFLAGS="${CPPFLAGS_save}"
else
VLC_ADD_PLUGINS([screen])
VLC_ADD_LDFLAGS([screen],[-lgdi32])
fi
fi
dnl
dnl ipv6 plugin - not for QNX yet
dnl
......
......@@ -7,6 +7,7 @@ SOURCES_access_ftp = ftp.c
SOURCES_dvdnav = dvdnav.c
SOURCES_dvdread = dvdread.c
SOURCES_slp = slp.c
SOURCES_screen = screen.c
SOURCES_cdda = \
cdda.c \
vcd/cdrom.c \
......
/*****************************************************************************
* screen.c: Screen capture module.
*****************************************************************************
* Copyright (C) 2004 VideoLAN
* $Id$
*
* Authors: Gildas Bazin <gbazin@videolan.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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
#ifndef WIN32
# include <X11/Xlib.h>
# include <X11/Xutil.h>
#endif
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define CACHING_TEXT N_("Caching value in ms")
#define CACHING_LONGTEXT N_( \
"Allows you to modify the default caching value for screen capture " \
"streams. This value should be set in millisecond units." )
#define FPS_TEXT N_("Frame rate")
#define FPS_LONGTEXT N_( \
"Allows you to set the desired frame rate for the capture." )
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
vlc_module_begin();
set_description( _("Screen Input") );
add_integer( "screen-caching", DEFAULT_PTS_DELAY / 1000, NULL,
CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
add_float( "screen-fps", 5, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
set_capability( "access_demux", 0 );
add_shortcut( "screen" );
set_callbacks( Open, Close );
vlc_module_end();
/*****************************************************************************
* Local prototypes
*****************************************************************************/
struct demux_sys_t
{
es_format_t fmt;
es_out_id_t *es;
float f_fps;
mtime_t i_next_date;
int i_incr;
#ifndef WIN32
Display *p_display;
#endif
};
static int Control( demux_t *, int, va_list );
static int Demux ( demux_t * );
static int InitCapture ( demux_t * );
static int CloseCapture( demux_t * );
static block_t *Capture( demux_t * );
/*****************************************************************************
* DemuxOpen:
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
vlc_value_t val;
/* Fill p_demux field */
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
memset( p_sys, 0, sizeof( demux_sys_t ) );
if( InitCapture( p_demux ) != VLC_SUCCESS )
{
free( p_sys );
return VLC_EGENERIC;
}
p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
/* Update default_pts to a suitable value for screen access */
var_Create( p_demux, "screen-caching", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
var_Create( p_demux, "screen-fps", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT );
var_Get( p_demux, "screen-fps", &val );
p_sys->f_fps = val.f_float;
p_sys->i_incr = 1000000 / val.f_float;
p_sys->i_next_date = 0;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close:
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
CloseCapture( p_demux );
free( p_sys );
}
/*****************************************************************************
* Demux:
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
block_t *p_block;
if( !p_sys->i_next_date ) p_sys->i_next_date = mdate();
/* Frame skipping if necessary */
while( mdate() >= p_sys->i_next_date + p_sys->i_incr )
p_sys->i_next_date += p_sys->i_incr;
mwait( p_sys->i_next_date );
p_block = Capture( p_demux );
if( !p_block ) return 0;
p_block->i_dts = p_block->i_pts = p_sys->i_next_date;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
es_out_Send( p_demux->out, p_sys->es, p_block );
p_sys->i_next_date += p_sys->i_incr;
return 1;
}
/*****************************************************************************
* Platform dependant capture functions
*****************************************************************************/
#ifdef WIN32
static int InitCapture( demux_t *p_demux )
{
return VLC_EGENERIC;
}
#else
static int InitCapture( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
XWindowAttributes win_info;
int i_chroma;
/* Open the display */
p_sys->p_display = XOpenDisplay( NULL );
if( !p_sys->p_display )
{
msg_Err( p_demux, "cannot open display" );
return VLC_EGENERIC;
}
/* Get the parameters of the root window */
if( !XGetWindowAttributes( p_sys->p_display,
DefaultRootWindow( p_sys->p_display ),
&win_info ) )
{
msg_Err( p_demux, "can't get root window attributes" );
XCloseDisplay( p_sys->p_display );
return VLC_EGENERIC;
}
switch( win_info.depth )
{
case 8: /* FIXME: set the palette */
i_chroma = VLC_FOURCC('R','G','B','2'); break;
case 15:
i_chroma = VLC_FOURCC('R','V','1','5'); break;
case 16:
i_chroma = VLC_FOURCC('R','V','1','6'); break;
case 24:
i_chroma = VLC_FOURCC('R','V','2','4'); break;
case 32:
i_chroma = VLC_FOURCC('R','V','3','2'); break;
default:
msg_Err( p_demux, "unknown screen depth %i", win_info.depth );
XCloseDisplay( p_sys->p_display );
return VLC_EGENERIC;
}
es_format_Init( &p_sys->fmt, VIDEO_ES, i_chroma );
p_sys->fmt.video.i_width = win_info.width;
p_sys->fmt.video.i_height = win_info.height;
#if 0
win_info.visual->red_mask;
win_info.visual->green_mask;
win_info.visual->blue_mask;
win_info.visual->bits_per_rgb;
#endif
return VLC_SUCCESS;
}
#endif
#ifdef WIN32
static int CloseCapture( demux_t *p_demux )
{
return VLC_SUCCESS;
}
#else
static int CloseCapture( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
XCloseDisplay( p_sys->p_display );
return VLC_SUCCESS;
}
#endif
#ifdef WIN32
static block_t *Capture( demux_t *p_demux )
{
return NULL;
}
#else
static block_t *Capture( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
block_t *p_block;
XImage *image;
int i_size;
image = XGetImage( p_sys->p_display, DefaultRootWindow( p_sys->p_display ),
0, 0, p_sys->fmt.video.i_width,
p_sys->fmt.video.i_height, AllPlanes, ZPixmap );
if( !image )
{
msg_Warn( p_demux, "cannot get image" );
return 0;
}
i_size = image->bytes_per_line * image->height;
if( !( p_block = block_New( p_demux, i_size ) ) )
{
msg_Warn( p_demux, "cannot get block" );
XDestroyImage( image );
return 0;
}
memcpy( p_block->p_buffer, image->data, i_size );
XDestroyImage( image );
return p_block;
}
#endif
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
vlc_bool_t *pb;
int64_t *pi64;
switch( i_query )
{
/* Special for access_demux */
case DEMUX_CAN_PAUSE:
case DEMUX_CAN_CONTROL_PACE:
/* TODO */
pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
*pb = VLC_FALSE;
return VLC_SUCCESS;
case DEMUX_GET_PTS_DELAY:
pi64 = (int64_t*)va_arg( args, int64_t * );
*pi64 = (int64_t)var_GetInteger( p_demux, "screen-caching" ) *1000;
return VLC_SUCCESS;
/* TODO implement others */
default:
return VLC_EGENERIC;
}
}
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