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Diffstat (limited to 'libavutil/color_utils.h')
-rw-r--r-- | libavutil/color_utils.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libavutil/color_utils.h b/libavutil/color_utils.h new file mode 100644 index 0000000..3600a72 --- /dev/null +++ b/libavutil/color_utils.h @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2015 Kevin Wheatley <kevin.j.wheatley@gmail.com> + * + * 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 AVUTIL_COLOR_UTILS_H +#define AVUTIL_COLOR_UTILS_H + + +#include "libavutil/pixfmt.h" + +/** + * Determine a suitable 'gamma' value to match the supplied + * AVColorTransferCharacteristic. + * + * See Apple Technical Note TN2257 (https://developer.apple.com/library/mac/technotes/tn2257/_index.html) + * + * @return Will return an approximation to the simple gamma function matching + * the supplied Transfer Characteristic, Will return 0.0 for any + * we cannot reasonably match against. + */ +double avpriv_get_gamma_from_trc(enum AVColorTransferCharacteristic trc); + +#endif |