From e9f7c7aef96dd8ca3519f0cfaa52573cf63a1d74 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 19 Jul 2014 04:57:47 +0200 Subject: sws: Move fast bilinear C code into seperate file Signed-off-by: Michael Niedermayer --- libswscale/hscale_fast_bilinear.c | 55 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 libswscale/hscale_fast_bilinear.c (limited to 'libswscale/hscale_fast_bilinear.c') diff --git a/libswscale/hscale_fast_bilinear.c b/libswscale/hscale_fast_bilinear.c new file mode 100644 index 0000000000..82d6177bde --- /dev/null +++ b/libswscale/hscale_fast_bilinear.c @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2001-2011 Michael Niedermayer + * + * 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; + } +} -- cgit v1.2.3