ass.h 3.49 KB
Newer Older
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
/*
 * SSA/ASS common funtions
 * Copyright (c) 2010  Aurelien Jacobs <aurel@gnuage.org>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_ASS_H
#define AVCODEC_ASS_H

#include "avcodec.h"

Aurelien Jacobs's avatar
Aurelien Jacobs committed
27
/**
28
 * @name Default values for ASS style
Aurelien Jacobs's avatar
Aurelien Jacobs committed
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
 * @{
 */
#define ASS_DEFAULT_FONT        "Arial"
#define ASS_DEFAULT_FONT_SIZE   16
#define ASS_DEFAULT_COLOR       0xffffff
#define ASS_DEFAULT_BACK_COLOR  0
#define ASS_DEFAULT_BOLD        0
#define ASS_DEFAULT_ITALIC      0
#define ASS_DEFAULT_UNDERLINE   0
#define ASS_DEFAULT_ALIGNMENT   2
/** @} */

/**
 * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
 *
 * @param avctx pointer to the AVCodecContext
 * @param font name of the default font face to use
 * @param font_size default font size to use
 * @param color default text color to use (ABGR)
 * @param back_color default background color to use (ABGR)
 * @param bold 1 for bold text, 0 for normal text
 * @param italic 1 for italic text, 0 for normal text
 * @param underline 1 for underline text, 0 for normal text
 * @param alignment position of the text (left, center, top...), defined after
 *                  the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top)
 * @return >= 0 on success otherwise an error code <0
 */
int ff_ass_subtitle_header(AVCodecContext *avctx,
                           const char *font, int font_size,
                           int color, int back_color,
                           int bold, int italic, int underline,
                           int alignment);

/**
 * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS
 * with default style.
 *
 * @param avctx pointer to the AVCodecContext
 * @return >= 0 on success otherwise an error code <0
 */
int ff_ass_subtitle_header_default(AVCodecContext *avctx);

71 72 73 74 75 76
/**
 * Add an ASS dialog line to an AVSubtitle as a new AVSubtitleRect.
 *
 * @param sub pointer to the AVSubtitle
 * @param dialog ASS dialog to add to sub
 * @param ts_start start timestamp for this dialog (in 1/100 second unit)
77 78
 * @param duration duration for this dialog (in 1/100 second unit), can be -1
 *                 to last until the end of the presentation
79 80 81 82 83 84 85 86 87 88
 * @param raw when set to 1, it indicates that dialog contains a whole ASS
 *                           dialog line which should be copied as is.
 *            when set to 0, it indicates that dialog contains only the Text
 *                           part of the ASS dialog line, the rest of the line
 *                           will be generated.
 * @return number of characters read from dialog. It can be less than the whole
 *         length of dialog, if dialog contains several lines of text.
 *         A negative value indicates an error.
 */
int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
89
                    int ts_start, int duration, int raw);
90 91

#endif /* AVCODEC_ASS_H */