1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*****************************************************************************
* osd_text.c : text manipulation functions
*****************************************************************************
* Copyright (C) 1999-2007 the VideoLAN team
* $Id: fc878fc37b6e4bc40e323041be8568174c58154b $
*
* Author: Sigmund Augdal Helberg <dnumgis@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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_vout.h>
#include <vlc_block.h>
#include <vlc_filter.h>
#include <vlc_osd.h>
/**
* \brief Show text on the video for some time
* \param p_spu pointer to the subpicture queue the text is to be showed on
* \param i_channel Subpicture channel
* \param psz_string The text to be shown
* \param p_style Pointer to a struct with text style info
* \param i_flags flags for alignment and such
* \param i_hmargin horizontal margin in pixels
* \param i_vmargin vertical margin in pixels
* \param i_duration Amount of time the text is to be shown.
*/
int osd_ShowTextRelative( spu_t *p_spu, int i_channel,
char *psz_string, text_style_t *p_style,
int i_flags, int i_hmargin, int i_vmargin,
mtime_t i_duration )
{
mtime_t i_now = mdate();
return osd_ShowTextAbsolute( p_spu, i_channel, psz_string,
p_style, i_flags, i_hmargin, i_vmargin,
i_now, i_now + i_duration );
}
/**
* \brief Show text on the video from a given start date to a given end date
* \param p_spu pointer to the subpicture queue the text is to be showed on
* \param i_channel Subpicture channel
* \param psz_string The text to be shown
* \param p_style Pointer to a struct with text style info
* \param i_flags flags for alignment and such
* \param i_hmargin horizontal margin in pixels
* \param i_vmargin vertical margin in pixels
* \param i_start the time when this string is to appear on the video
* \param i_stop the time when this string should stop to be displayed
* if this is 0 the string will be shown untill the next string
* is about to be shown
*/
int osd_ShowTextAbsolute( spu_t *p_spu_channel, int i_channel,
char *psz_string, text_style_t *p_style,
int i_flags, int i_hmargin, int i_vmargin,
mtime_t i_start, mtime_t i_stop )
{
subpicture_t *p_spu;
video_format_t fmt;
(void)p_style;
if( !psz_string ) return VLC_EGENERIC;
p_spu = spu_CreateSubpicture( p_spu_channel );
if( !p_spu ) return VLC_EGENERIC;
/* Create a new subpicture region */
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 = fmt.i_y_offset = 0;
p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_spu_channel), &fmt );
if( !p_spu->p_region )
{
msg_Err( p_spu_channel, "cannot allocate SPU region" );
spu_DestroySubpicture( p_spu_channel, p_spu );
return VLC_EGENERIC;
}
p_spu->p_region->psz_text = strdup( psz_string );
p_spu->p_region->i_align = i_flags & SUBPICTURE_ALIGN_MASK;
p_spu->i_start = i_start;
p_spu->i_stop = i_stop;
p_spu->b_ephemer = true;
p_spu->b_absolute = false;
p_spu->i_x = i_hmargin;
p_spu->i_y = i_vmargin;
p_spu->i_flags = i_flags & ~SUBPICTURE_ALIGN_MASK;
p_spu->i_channel = i_channel;
spu_DisplaySubpicture( p_spu_channel, p_spu );
return VLC_SUCCESS;
}
/**
* \brief Write an informative message at the default location,
* for the default duration and only if the OSD option is enabled.
* \param p_caller The object that called the function.
* \param i_channel Subpicture channel
* \param psz_format printf style formatting
**/
void osd_Message( spu_t *p_spu, int i_channel,
char *psz_format, ... )
{
va_list args;
if( p_spu )
{
char *psz_string;
va_start( args, psz_format );
if( vasprintf( &psz_string, psz_format, args ) != -1 )
{
osd_ShowTextRelative( p_spu, i_channel, psz_string, NULL,
OSD_ALIGN_TOP|OSD_ALIGN_RIGHT, 30,20,1000000 );
free( psz_string );
}
va_end( args );
}
}
|