Commit 0a10a015 authored by Mark Moriarty's avatar Mark Moriarty

Add marq.c, marquee video filter.

parent 0acb799b
/*****************************************************************************
* marq.c : marquee display video plugin for vlc
*****************************************************************************
* Copyright (C) 2003-2004 VideoLAN
* $Id: time.c 8751 2004-09-20 21:51:41Z gbazin $
*
* Authors: Mark Moriarty
*
* 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> /* malloc(), free() */
#include <string.h>
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include "vlc_filter.h"
#include "vlc_block.h"
#include "osd.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int CreateFilter ( vlc_object_t * );
static void DestroyFilter( vlc_object_t * );
static subpicture_t *Filter( filter_t *, mtime_t );
/*****************************************************************************
* filter_sys_t: marquee filter descriptor
*****************************************************************************/
struct filter_sys_t
{
int i_xoff, i_yoff; /* offsets for the display string in the video window */
char *psz_marquee; /* marquee string */
time_t last_time;
};
#define MSG_TEXT N_("Marquee text")
#define MSG_LONGTEXT N_("Marquee text to display")
#define POSX_TEXT N_("X offset, from left")
#define POSX_LONGTEXT N_("X offset, from the left screen edge" )
#define POSY_TEXT N_("Y offset, from the top")
#define POSY_LONGTEXT N_("Y offset, down from the top" )
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_capability( "sub filter", 0 );
set_callbacks( CreateFilter, DestroyFilter );
add_string( "marquee", "Marquee", NULL, MSG_TEXT, MSG_LONGTEXT, VLC_FALSE );
add_integer( "marq-x", 0, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
add_integer( "marq-y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
set_description( _("Marquee display sub filter") );
add_shortcut( "marq" );
vlc_module_end();
/*****************************************************************************
* CreateFilter: allocates marquee video filter
*****************************************************************************/
static int CreateFilter( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
filter_sys_t *p_sys;
vlc_value_t val;
/* Allocate structure */
p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
if( p_sys == NULL )
{
msg_Err( p_filter, "out of memory" );
return VLC_ENOMEM;
}
/* hook to the playlist */
vlc_object_t *p_pl =
vlc_object_find( p_this, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
if( !p_pl )
{
return VLC_ENOOBJ;
}
var_Create( p_this, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Get( p_filter, "marq-x", &val );
p_sys->i_xoff = val.i_int;
var_Create( p_this, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Get( p_filter, "marq-y", &val );
p_sys->i_yoff = val.i_int;
/* Create the playlist marquee variables, free up the data structure */
var_Create( p_pl, "marquee", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
var_Create( p_pl, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Create( p_pl, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
vlc_object_release( p_pl );
/* Misc init */
p_filter->pf_sub_filter = Filter;
p_sys->last_time = ((time_t)-1);
return VLC_SUCCESS;
}
/*****************************************************************************
* DestroyFilter: destroy marquee video filter
*****************************************************************************/
static void DestroyFilter( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
filter_sys_t *p_sys = p_filter->p_sys;
if( p_sys->psz_marquee ) free( p_sys->psz_marquee );
free( p_sys );
/* Delete the marquee variables from playlist */
vlc_object_t *p_pl =
vlc_object_find( p_this, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
var_Destroy(p_pl,"marquee");
var_Destroy(p_pl,"marq-x");
var_Destroy(p_pl,"marq_y");
vlc_object_release( p_pl );
}
/****************************************************************************
* Filter: the whole thing
****************************************************************************
* This function outputs subpictures at regular time intervals.
****************************************************************************/
static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
{
filter_sys_t *p_sys = p_filter->p_sys;
subpicture_t *p_spu;
video_format_t fmt;
time_t t;
vlc_value_t val;
if( p_sys->last_time == time( NULL ) ) return NULL;
p_spu = p_filter->pf_sub_buffer_new( p_filter );
if( !p_spu ) return NULL;
memset( &fmt, 0, sizeof(video_format_t) );
fmt.i_chroma = VLC_FOURCC('T','E','X','T');
fmt.i_aspect = 0;
fmt.i_width = fmt.i_height = 0;
fmt.i_x_offset = 0;
fmt.i_y_offset = 0;
p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt );
if( !p_spu->p_region )
{
p_filter->pf_sub_buffer_del( p_filter, p_spu );
return NULL;
}
t = p_sys->last_time = time( NULL );
/* hook to the playlist. Can this just be done once somewhere? */
vlc_object_t *p_pl =
vlc_object_find( p_filter, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
var_Get(p_pl, "marquee", &val);
p_sys->psz_marquee = val.psz_string;
var_Get(p_pl, "marq-x", &val);
p_sys->i_xoff = val.i_int;
var_Get(p_pl, "marq-y", &val);
p_sys->i_yoff = val.i_int;
vlc_object_release( p_pl );
/* Does vlc_object_release have to be done every time? */
p_spu->p_region->psz_text = strdup(p_sys->psz_marquee);
p_spu->i_start = date;
p_spu->i_stop = 0;
p_spu->b_ephemer = VLC_TRUE;
p_spu->b_absolute = VLC_FALSE;
p_spu->i_x = p_sys->i_xoff;
p_spu->i_y = p_sys->i_yoff;
p_spu->i_flags = OSD_ALIGN_LEFT|OSD_ALIGN_TOP ;
return p_spu;
}
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