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ffmpeg / libavfilter / parseutils.h @ 2722dd6e

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/*
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 * copyright (c) 2009 Stefano Sabatini
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file
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 * parsing utils
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 */
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#ifndef AVFILTER_PARSEUTILS_H
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#define AVFILTER_PARSEUTILS_H
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#include "libavutil/opt.h"
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/**
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 * Put the RGBA values that correspond to color_string in rgba_color.
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 *
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 * @param color_string a string specifying a color. It can be the name of
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 * a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
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 * possibly followed by "@" and a string representing the alpha
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 * component.
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 * The alpha component may be a string composed by "0x" followed by an
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 * hexadecimal number or a decimal number between 0.0 and 1.0, which
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 * represents the opacity value (0x00/0.0 means completely transparent,
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 * 0xff/1.0 completely opaque).
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 * If the alpha component is not specified then 0xff is assumed.
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 * The string "random" will result in a random color.
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 * @param slen length of the initial part of color_string containing the
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 * color. It can be set to -1 if color_string is a null terminated string
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 * containing nothing else than the color.
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 * @return >= 0 in case of success, a negative value in case of
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 * failure (for example if color_string cannot be parsed).
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 */
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int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
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                   void *log_ctx);
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#endif  /* AVFILTER_PARSEUTILS_H */