Make ff_ass_subtitle_header static to ass.c
[libav.git] / libavcodec / ass.h
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1/*
2 * SSA/ASS common funtions
3 * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_ASS_H
23#define AVCODEC_ASS_H
24
25#include "avcodec.h"
26
27/**
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28 * Default values for ASS style.
29 * @defgroup ass_default
30 * @{
31 */
32#define ASS_DEFAULT_FONT "Arial"
33#define ASS_DEFAULT_FONT_SIZE 16
34#define ASS_DEFAULT_COLOR 0xffffff
35#define ASS_DEFAULT_BACK_COLOR 0
36#define ASS_DEFAULT_BOLD 0
37#define ASS_DEFAULT_ITALIC 0
38#define ASS_DEFAULT_UNDERLINE 0
39#define ASS_DEFAULT_ALIGNMENT 2
40/** @} */
41
42/**
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43 * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS
44 * with default style.
45 *
46 * @param avctx pointer to the AVCodecContext
47 * @return >= 0 on success otherwise an error code <0
48 */
49int ff_ass_subtitle_header_default(AVCodecContext *avctx);
50
51/**
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52 * Initialize an AVSubtitle structure for use with ff_ass_add_rect().
53 *
54 * @param sub pointer to the AVSubtitle
55 */
56void ff_ass_init(AVSubtitle *sub);
57
58/**
59 * Add an ASS dialog line to an AVSubtitle as a new AVSubtitleRect.
60 *
61 * @param sub pointer to the AVSubtitle
62 * @param dialog ASS dialog to add to sub
63 * @param ts_start start timestamp for this dialog (in 1/100 second unit)
64 * @param ts_end end timestamp for this dialog (in 1/100 second unit)
65 * @param raw when set to 1, it indicates that dialog contains a whole ASS
66 * dialog line which should be copied as is.
67 * when set to 0, it indicates that dialog contains only the Text
68 * part of the ASS dialog line, the rest of the line
69 * will be generated.
70 * @return number of characters read from dialog. It can be less than the whole
71 * length of dialog, if dialog contains several lines of text.
72 * A negative value indicates an error.
73 */
74int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
75 int ts_start, int ts_end, int raw);
76
77#endif /* AVCODEC_ASS_H */