/*
  * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
  *
  * 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
  */
 
 #include "swscale_internal.h"
 
 void ff_hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
                            const uint8_t *src, int srcW, int xInc)
 {
     int i;
     unsigned int xpos = 0;
     for (i = 0; i < dstWidth; i++) {
         register unsigned int xx     = xpos >> 16;
         register unsigned int xalpha = (xpos & 0xFFFF) >> 9;
         dst[i] = (src[xx] << 7) + (src[xx + 1] - src[xx]) * xalpha;
         xpos  += xInc;
     }
     for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--)
         dst[i] = src[srcW-1]*128;
 }
 
 void ff_hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,
                            int dstWidth, const uint8_t *src1,
                            const uint8_t *src2, int srcW, int xInc)
 {
     int i;
     unsigned int xpos = 0;
     for (i = 0; i < dstWidth; i++) {
         register unsigned int xx     = xpos >> 16;
         register unsigned int xalpha = (xpos & 0xFFFF) >> 9;
         dst1[i] = (src1[xx] * (xalpha ^ 127) + src1[xx + 1] * xalpha);
         dst2[i] = (src2[xx] * (xalpha ^ 127) + src2[xx + 1] * xalpha);
         xpos   += xInc;
     }
     for (i=dstWidth-1; (i*xInc)>>16 >=srcW-1; i--) {
         dst1[i] = src1[srcW-1]*128;
         dst2[i] = src2[srcW-1]*128;
     }
 }