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57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
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* This file is copied from ffmpeg's libavcodec/colorspace.h
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* for the YUV_TO_RGB{1,2}_CCIR macros.
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* Original copyright header and contents follows:
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*/
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/*
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* Colorspace conversion defines
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* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
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*
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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 libavcodec/colorspace.h
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* Various defines for YUV<->RGB conversion
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*/
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#ifndef AVCODEC_COLORSPACE_H
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#define AVCODEC_COLORSPACE_H
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#define SCALEBITS 10
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#define ONE_HALF (1 << (SCALEBITS - 1))
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#define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
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#define YUV_TO_RGB1_CCIR(cb1, cr1)\
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{\
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cb = (cb1) - 128;\
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cr = (cr1) - 128;\
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r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\
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g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \
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ONE_HALF;\
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b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\
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}
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#define YUV_TO_RGB2_CCIR(r, g, b, y1)\
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{\
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y = ((y1) - 16) * FIX(255.0/219.0);\
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r = cm[(y + r_add) >> SCALEBITS];\
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g = cm[(y + g_add) >> SCALEBITS];\
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b = cm[(y + b_add) >> SCALEBITS];\
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}
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#endif /* AVCODEC_COLORSPACE_H */
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