/* * SSA/ASS common functions * 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"#include "libavutil/bprint.h" #define ASS_DEFAULT_PLAYRESX 384#define ASS_DEFAULT_PLAYRESY 288 /** * @name Default values for ASS style * @{ */#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#define ASS_DEFAULT_BORDERSTYLE 1/** @} */ typedef struct FFASSDecoderContext {    int readorder;} FFASSDecoderContext; /** * 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 border_style, 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); /** * Craft an ASS dialog string. */char *ff_ass_get_dialog(int readorder, int layer, const char *style,                        const char *speaker, const char *text); /** * Add an ASS dialog to a subtitle. */int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,                    int readorder, int layer, const char *style,                    const char *speaker); /** * Helper to flush a text subtitles decoder making use of the * FFASSDecoderContext. */void ff_ass_decoder_flush(AVCodecContext *avctx); /** * Escape a text subtitle using ASS syntax into an AVBPrint buffer. * Newline characters will be escaped to \N. * * @param buf pointer to an initialized AVBPrint buffer * @param p source text * @param size size of the source text * @param linebreaks additional newline chars, which will be escaped to \N * @param keep_ass_markup braces and backslash will not be escaped if set */void ff_ass_bprint_text_event(AVBPrint *buf, const char *p, int size,                             const char *linebreaks, int keep_ass_markup);#endif /* AVCODEC_ASS_H */