1 /*****************************************************************************
2 * time.c : time display video plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2003-2004 VideoLAN
5 * $Id: logo.c 8721 2004-09-17 10:21:00Z gbazin $
7 * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
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 );
44 /*****************************************************************************
45 * filter_sys_t: time filter descriptor
46 *****************************************************************************/
49 int i_xoff, i_yoff; /* offsets for the display string in the video window */
50 char *psz_head; /* text to put before the day/time */
55 #define MSG_TEXT N_("Timestamp Prefix")
56 #define MSG_LONGTEXT N_("Text (name) to display before the date and time")
57 #define POSX_TEXT N_("X coordinate of the timestamp")
58 #define POSX_LONGTEXT N_("Positive offset, from the left" )
59 #define POSY_TEXT N_("Y coordinate of the timestamp")
60 #define POSY_LONGTEXT N_("Positive offset, down from the top" )
61 #define TRANS_TEXT N_("Transparency of the timestamp")
63 /*****************************************************************************
65 *****************************************************************************/
67 set_capability( "sub filter", 0 );
68 set_callbacks( CreateFilter, DestroyFilter );
69 add_string( "time-text", NULL, NULL, MSG_TEXT, MSG_LONGTEXT, VLC_FALSE );
70 add_integer( "time-x", 0, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
71 add_integer( "time-y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
72 set_description( _("Time display sub filter") );
73 add_shortcut( "time" );
76 /*****************************************************************************
77 * CreateFilter: allocates logo video filter
78 *****************************************************************************/
79 static int CreateFilter( vlc_object_t *p_this )
81 filter_t *p_filter = (filter_t *)p_this;
85 /* Allocate structure */
86 p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
89 msg_Err( p_filter, "out of memory" );
93 var_Create( p_this, "time-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
94 var_Get( p_filter, "time-x", &val );
95 p_sys->i_xoff = val.i_int;
96 var_Create( p_this, "time-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
97 var_Get( p_filter, "time-y", &val );
98 p_sys->i_yoff = val.i_int;
99 p_sys->psz_head = var_CreateGetString( p_this, "time-text" );
102 p_filter->pf_sub_filter = Filter;
103 p_sys->last_time = ((time_t)-1);
107 /*****************************************************************************
108 * DestroyFilter: destroy logo video filter
109 *****************************************************************************/
110 static void DestroyFilter( vlc_object_t *p_this )
112 filter_t *p_filter = (filter_t *)p_this;
113 filter_sys_t *p_sys = p_filter->p_sys;
115 if( p_sys->psz_head ) free( p_sys->psz_head );
119 char *myCtime( time_t *t )
124 return strdup( tmp );
126 return strdup( ctime(t) );
130 /****************************************************************************
131 * Filter: the whole thing
132 ****************************************************************************
133 * This function outputs subpictures at regular time intervals.
134 ****************************************************************************/
135 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
137 filter_sys_t *p_sys = p_filter->p_sys;
141 char *psz_time, *psz_string;
143 if( p_sys->last_time == time( NULL ) ) return NULL;
145 p_spu = p_filter->pf_sub_buffer_new( p_filter );
146 if( !p_spu ) return NULL;
148 memset( &fmt, 0, sizeof(video_format_t) );
149 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
151 fmt.i_width = fmt.i_height = 0;
155 p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt );
156 if( !p_spu->p_region )
158 p_filter->pf_sub_buffer_del( p_filter, p_spu );
162 t = p_sys->last_time = time( NULL );
164 psz_time = myCtime( &t );
165 asprintf( &psz_string, "%s%s", p_sys->psz_head, psz_time );
168 p_spu->p_region->psz_text = psz_string;
169 p_spu->i_start = date;
170 p_spu->i_stop = date + 1000000;
171 p_spu->b_ephemer = VLC_TRUE;
172 p_spu->b_absolute = VLC_FALSE;
173 p_spu->i_x = p_sys->i_xoff;
174 p_spu->i_y = p_sys->i_yoff;
176 p_spu->i_flags = OSD_ALIGN_LEFT|OSD_ALIGN_TOP ;