/* * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.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 */ #include "libavutil/attributes.h"#include "libavutil/common.h" #include "cfhddsp.h" static av_always_inline void filter(int16_t *output, ptrdiff_t out_stride,                          const int16_t *low, ptrdiff_t low_stride,                          const int16_t *high, ptrdiff_t high_stride,                          int len, int clip){    int16_t tmp;    int i;     tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;    output[(2*0+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;    if (clip)        output[(2*0+0)*out_stride] = av_clip_uintp2_c(output[(2*0+0)*out_stride], clip);     tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;    output[(2*0+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;    if (clip)        output[(2*0+1)*out_stride] = av_clip_uintp2_c(output[(2*0+1)*out_stride], clip);     for (i = 1; i < len - 1; i++) {        tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;        output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;        if (clip)            output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);         tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;        output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;        if (clip)            output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);    }     tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;    output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;    if (clip)        output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);     tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;    output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;    if (clip)        output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);} static void vert_filter(int16_t *output, ptrdiff_t out_stride,                        const int16_t *low, ptrdiff_t low_stride,                        const int16_t *high, ptrdiff_t high_stride,                        int width, int height){    for (int i = 0; i < width; i++) {        filter(output, out_stride, low, low_stride, high, high_stride, height, 0);        low++;        high++;        output++;    }} static void horiz_filter(int16_t *output, ptrdiff_t ostride,                         const int16_t *low, ptrdiff_t lstride,                         const int16_t *high, ptrdiff_t hstride,                         int width, int height){    for (int i = 0; i < height; i++) {        filter(output, 1, low, 1, high, 1, width, 0);        low    += lstride;        high   += hstride;        output += ostride * 2;    }} static void horiz_filter_clip(int16_t *output, const int16_t *low, const int16_t *high,                              int width, int clip){    filter(output, 1, low, 1, high, 1, width, clip);} static void horiz_filter_clip_bayer(int16_t *output, const int16_t *low, const int16_t *high,                                    int width, int clip){    filter(output, 2, low, 1, high, 1, width, clip);} av_cold void ff_cfhddsp_init(CFHDDSPContext *c, int depth, int bayer){    c->horiz_filter = horiz_filter;    c->vert_filter = vert_filter;     if (bayer)        c->horiz_filter_clip = horiz_filter_clip_bayer;    else        c->horiz_filter_clip = horiz_filter_clip; #if ARCH_X86    ff_cfhddsp_init_x86(c, depth, bayer);#endif}