1/* 2 * SSA/ASS common funtions 3 * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> 4 * 5 * This file is part of Libav. 6 * 7 * Libav 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 * Libav 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 Libav; 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/** 28 * @name Default values for ASS style 29 * @{ 30 */ 31#define ASS_DEFAULT_FONT "Arial" 32#define ASS_DEFAULT_FONT_SIZE 16 33#define ASS_DEFAULT_COLOR 0xffffff 34#define ASS_DEFAULT_BACK_COLOR 0 35#define ASS_DEFAULT_BOLD 0 36#define ASS_DEFAULT_ITALIC 0 37#define ASS_DEFAULT_UNDERLINE 0 38#define ASS_DEFAULT_ALIGNMENT 2 39/** @} */ 40 41/** 42 * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS 43 * with default style. 44 * 45 * @param avctx pointer to the AVCodecContext 46 * @return >= 0 on success otherwise an error code <0 47 */ 48int ff_ass_subtitle_header_default(AVCodecContext *avctx); 49 50/** 51 * Initialize an AVSubtitle structure for use with ff_ass_add_rect(). 52 * 53 * @param sub pointer to the AVSubtitle 54 */ 55void ff_ass_init(AVSubtitle *sub); 56 57/** 58 * Add an ASS dialog line to an AVSubtitle as a new AVSubtitleRect. 59 * 60 * @param sub pointer to the AVSubtitle 61 * @param dialog ASS dialog to add to sub 62 * @param ts_start start timestamp for this dialog (in 1/100 second unit) 63 * @param ts_end end timestamp for this dialog (in 1/100 second unit) 64 * @param raw when set to 1, it indicates that dialog contains a whole ASS 65 * dialog line which should be copied as is. 66 * when set to 0, it indicates that dialog contains only the Text 67 * part of the ASS dialog line, the rest of the line 68 * will be generated. 69 * @return number of characters read from dialog. It can be less than the whole 70 * length of dialog, if dialog contains several lines of text. 71 * A negative value indicates an error. 72 */ 73int ff_ass_add_rect(AVSubtitle *sub, const char *dialog, 74 int ts_start, int ts_end, int raw); 75 76#endif /* AVCODEC_ASS_H */ 77