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Diffstat (limited to 'ffmpeg1/libavcodec/ass.h')
| -rw-r--r-- | ffmpeg1/libavcodec/ass.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/ass.h b/ffmpeg1/libavcodec/ass.h new file mode 100644 index 0000000..e9339e4 --- /dev/null +++ b/ffmpeg1/libavcodec/ass.h @@ -0,0 +1,91 @@ +/* + * 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" + +/** + * @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 +/** @} */ + +/** + * 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); + +/** + * 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) + * @param duration duration for this dialog (in 1/100 second unit), can be -1 + * to last until the end of the presentation + * @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, + int ts_start, int duration, int raw); + +#endif /* AVCODEC_ASS_H */ |