time.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:6k
- /*****************************************************************************
- * time.c : time display video plugin for vlc
- *****************************************************************************
- * Copyright (C) 2003-2004 VideoLAN
- * $Id: time.c 8793 2004-09-25 17:51:24Z sigmunau $
- *
- * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
- *
- * 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: time filter descriptor
- *****************************************************************************/
- struct filter_sys_t
- {
- int i_xoff, i_yoff; /* offsets for the display string in the video window */
- char *psz_format; /* time format string */
- time_t last_time;
- };
- #define MSG_TEXT N_("Time format string (%Y%m%d %H%M%S)")
- #define MSG_LONGTEXT N_("Time format string (%Y = year, %m = month, %d = day, %H = hour, %M = minute, %S = second")
- #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( "time-format", "%Y-%m-%d %H:%M:%S", NULL, MSG_TEXT, MSG_LONGTEXT, VLC_FALSE );
- add_integer( "time-x", 0, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
- add_integer( "time-y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
- set_description( _("Time display sub filter") );
- add_shortcut( "time" );
- vlc_module_end();
- /*****************************************************************************
- * CreateFilter: allocates logo 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;
- }
- var_Create( p_this, "time-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_filter, "time-x", &val );
- p_sys->i_xoff = val.i_int;
- var_Create( p_this, "time-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_filter, "time-y", &val );
- p_sys->i_yoff = val.i_int;
- p_sys->psz_format = var_CreateGetString( p_this, "time-format" );
- /* Misc init */
- p_filter->pf_sub_filter = Filter;
- p_sys->last_time = ((time_t)-1);
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * DestroyFilter: destroy logo 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_format ) free( p_sys->psz_format );
- free( p_sys );
- }
- static char *FormatTime(char *tformat )
- {
- char buffer[255];
- time_t curtime;
- #if defined(HAVE_LOCALTIME_R)
- struct tm loctime;
- #else
- struct tm *loctime;
- #endif
- /* Get the current time. */
- curtime = time( NULL );
- /* Convert it to local time representation. */
- #if defined(HAVE_LOCALTIME_R)
- localtime_r( &curtime, &loctime );
- strftime( buffer, 255, tformat, &loctime );
- #else
- loctime = localtime( &curtime );
- strftime( buffer, 255, tformat, loctime );
- #endif
- return strdup( buffer );
- }
- /****************************************************************************
- * 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;
- 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;
- }
- p_sys->last_time = time( NULL );
- p_spu->p_region->psz_text = FormatTime( p_sys->psz_format );
- 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;
- }