1 /*****************************************************************************
2 * marq.c : marquee display video plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2003-2004 VideoLAN
5 * $Id: time.c 8751 2004-09-20 21:51:41Z gbazin $
7 * Authors: Mark Moriarty
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
33 #include "vlc_filter.h"
34 #include "vlc_block.h"
37 /*****************************************************************************
39 *****************************************************************************/
40 static int CreateFilter ( vlc_object_t * );
41 static void DestroyFilter( vlc_object_t * );
42 static subpicture_t *Filter( filter_t *, mtime_t );
45 static int MarqueeCallback( vlc_object_t *p_this, char const *psz_var,
46 vlc_value_t oldval, vlc_value_t newval,
49 /*****************************************************************************
50 * filter_sys_t: marquee filter descriptor
51 *****************************************************************************/
54 int i_xoff, i_yoff; /* offsets for the display string in the video window */
55 int i_pos; /* permit relative positioning (top, bottom, left, right, center) */
58 char *psz_marquee; /* marquee string */
61 vlc_bool_t b_absolute; /* position control, relative vs. absolute */
63 vlc_bool_t b_need_update;
66 #define MSG_TEXT N_("Marquee text")
67 #define MSG_LONGTEXT N_("Marquee text to display")
68 #define POSX_TEXT N_("X offset, from left")
69 #define POSX_LONGTEXT N_("X offset, from the left screen edge" )
70 #define POSY_TEXT N_("Y offset, from the top")
71 #define POSY_LONGTEXT N_("Y offset, down from the top" )
72 #define TIMEOUT_TEXT N_("Marquee timeout")
73 #define TIMEOUT_LONGTEXT N_("Defines the time the marquee must remain " \
74 "displayed, in milliseconds. Default value is " \
75 "0 (remain forever).")
76 #define POS_TEXT N_("Marquee position")
77 #define POS_LONGTEXT N_( \
78 "You can enforce the marquee position on the video " \
79 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
80 "also use combinations of these values by adding them).")
82 static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
83 static char *ppsz_pos_descriptions[] =
84 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
85 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
87 /*****************************************************************************
89 *****************************************************************************/
91 set_capability( "sub filter", 0 );
92 set_shortname( N_("Marquee" ));
93 set_callbacks( CreateFilter, DestroyFilter );
94 set_category( CAT_VIDEO );
95 set_subcategory( SUBCAT_VIDEO_SUBPIC );
96 add_string( "marq-marquee", "Marquee", NULL, MSG_TEXT, MSG_LONGTEXT, VLC_FALSE );
97 add_integer( "marq-x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
98 add_integer( "marq-y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
99 add_integer( "marq-timeout", 0, NULL, TIMEOUT_TEXT, TIMEOUT_LONGTEXT,
101 add_integer( "marq-position", 5, NULL, POS_TEXT, POS_LONGTEXT, VLC_TRUE );
102 /* 5 sets the default to top [1] left [4] */
103 change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
104 set_description( _("Marquee display sub filter") );
105 add_shortcut( "marq" );
108 /*****************************************************************************
109 * CreateFilter: allocates marquee video filter
110 *****************************************************************************/
111 static int CreateFilter( vlc_object_t *p_this )
113 filter_t *p_filter = (filter_t *)p_this;
115 vlc_object_t *p_input;
117 /* Allocate structure */
118 p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
121 msg_Err( p_filter, "out of memory" );
125 /* Hook used for callback variables */
126 p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_ANYWHERE );
132 p_sys->i_xoff = var_CreateGetInteger( p_input->p_libvlc , "marq-x" );
133 p_sys->i_yoff = var_CreateGetInteger( p_input->p_libvlc , "marq-y" );
134 p_sys->i_timeout = var_CreateGetInteger( p_input->p_libvlc , "marq-timeout" );
135 p_sys->i_pos = var_CreateGetInteger( p_input->p_libvlc , "marq-position" );
136 p_sys->psz_marquee = var_CreateGetString( p_input->p_libvlc, "marq-marquee" );
138 var_AddCallback( p_input->p_libvlc, "marq-x", MarqueeCallback, p_sys );
139 var_AddCallback( p_input->p_libvlc, "marq-y", MarqueeCallback, p_sys );
140 var_AddCallback( p_input->p_libvlc, "marq-marquee", MarqueeCallback, p_sys );
141 var_AddCallback( p_input->p_libvlc, "marq-timeout", MarqueeCallback, p_sys );
142 var_AddCallback( p_input->p_libvlc, "marq-position", MarqueeCallback, p_sys );
144 vlc_object_release( p_input );
146 p_sys->b_absolute = VLC_TRUE;
147 if( p_sys->i_xoff < 0 || p_sys->i_yoff < 0 )
149 p_sys->b_absolute = VLC_FALSE;
150 p_sys->i_xoff = 0; p_sys->i_yoff = 0;
154 p_filter->pf_sub_filter = Filter;
155 p_sys->last_time = ((time_t)-1);
156 p_sys->b_need_update = VLC_TRUE;
160 /*****************************************************************************
161 * DestroyFilter: destroy marquee video filter
162 *****************************************************************************/
163 static void DestroyFilter( vlc_object_t *p_this )
165 filter_t *p_filter = (filter_t *)p_this;
166 filter_sys_t *p_sys = p_filter->p_sys;
167 vlc_object_t *p_input;
169 if( p_sys->psz_marquee ) free( p_sys->psz_marquee );
172 /* Delete the marquee variables from playlist */
173 p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_ANYWHERE );
178 var_Destroy( p_input->p_libvlc , "marq-marquee" );
179 var_Destroy( p_input->p_libvlc , "marq-x" );
180 var_Destroy( p_input->p_libvlc , "marq-y" );
181 var_Destroy( p_input->p_libvlc , "marq-timeout" );
182 var_Destroy( p_input->p_libvlc , "marq-position" );
183 vlc_object_release( p_input );
186 /****************************************************************************
187 * Filter: the whole thing
188 ****************************************************************************
189 * This function outputs subpictures at regular time intervals.
190 ****************************************************************************/
191 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
193 filter_sys_t *p_sys = p_filter->p_sys;
198 if( p_sys->last_time == time( NULL ) )
203 if( p_sys->b_need_update == VLC_FALSE )
208 p_spu = p_filter->pf_sub_buffer_new( p_filter );
209 if( !p_spu ) return NULL;
211 p_spu->b_absolute = p_sys->b_absolute;
212 memset( &fmt, 0, sizeof(video_format_t) );
213 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
215 fmt.i_width = fmt.i_height = 0;
219 p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt );
220 if( !p_spu->p_region )
222 p_filter->pf_sub_buffer_del( p_filter, p_spu );
226 t = p_sys->last_time = time( NULL );
228 p_spu->p_region->psz_text = strdup(p_sys->psz_marquee);
229 p_spu->i_start = date;
230 p_spu->i_stop = p_sys->i_timeout == 0 ? 0 : date + p_sys->i_timeout * 1000;
231 p_spu->b_ephemer = VLC_TRUE;
232 p_spu->i_x = p_sys->i_xoff;
233 p_spu->i_y = p_sys->i_yoff;
235 p_spu->i_flags = p_sys->i_pos;
237 p_sys->b_need_update = VLC_FALSE;
241 /**********************************************************************
242 * Callback to update params on the fly
243 **********************************************************************/
244 static int MarqueeCallback( vlc_object_t *p_this, char const *psz_var,
245 vlc_value_t oldval, vlc_value_t newval,
248 filter_sys_t *p_sys = (filter_sys_t *) p_data;
250 if( !strncmp( psz_var, "marq-marquee", 7 ) )
252 if( p_sys->psz_marquee ) free( p_sys->psz_marquee );
253 p_sys->psz_marquee = strdup( newval.psz_string );
255 else if ( !strncmp( psz_var, "marq-x", 6 ) )
257 p_sys->i_xoff = newval.i_int;
259 else if ( !strncmp( psz_var, "marq-y", 6 ) )
261 p_sys->i_yoff = newval.i_int;
263 else if ( !strncmp( psz_var, "marq-timeout", 12 ) )
265 p_sys->i_timeout = newval.i_int;
267 else if ( !strncmp( psz_var, "marq-position", 8 ) )
268 /* willing to accept a match against marq-pos */
270 p_sys->i_pos = newval.i_int;
272 p_sys->b_need_update = VLC_TRUE;