/* * Copyright (C) 2013 Wei Gao <weigao@multicorewareinc.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 AVFILTER_UNSHARP_KERNEL_H#define AVFILTER_UNSHARP_KERNEL_H #include "libavutil/opencl.h" const char *ff_kernel_unsharp_opencl = AV_OPENCL_KERNEL(inline unsigned char clip_uint8(int a){    if (a & (~0xFF))        return (-a)>>31;    else        return a;} kernel void unsharp(global  unsigned char *src,                    global  unsigned char *dst,                    const global  unsigned int *mask_lu,                    const global  unsigned int *mask_ch,                    int amount_lu,                    int amount_ch,                    int step_x_lu,                    int step_y_lu,                    int step_x_ch,                    int step_y_ch,                    int scalebits_lu,                    int scalebits_ch,                    int halfscale_lu,                    int halfscale_ch,                    int src_stride_lu,                    int src_stride_ch,                    int dst_stride_lu,                    int dst_stride_ch,                    int height,                    int width,                    int ch,                    int cw){    global unsigned char *dst_y = dst;    global unsigned char *dst_u = dst_y + height * dst_stride_lu;    global unsigned char *dst_v = dst_u + ch * dst_stride_ch;     global unsigned char *src_y = src;    global unsigned char *src_u = src_y + height * src_stride_lu;    global unsigned char *src_v = src_u + ch * src_stride_ch;     global unsigned char *temp_dst;    global unsigned char *temp_src;    const global unsigned int *temp_mask;    int global_id = get_global_id(0);    int i, j, x, y, temp_src_stride, temp_dst_stride, temp_height, temp_width, temp_steps_x, temp_steps_y,        temp_amount, temp_scalebits, temp_halfscale, sum, idx_x, idx_y, temp, res;    if (global_id < width * height) {        y = global_id / width;        x = global_id % width;        temp_dst = dst_y;        temp_src = src_y;        temp_src_stride = src_stride_lu;        temp_dst_stride = dst_stride_lu;        temp_height = height;        temp_width = width;        temp_steps_x = step_x_lu;        temp_steps_y = step_y_lu;        temp_mask = mask_lu;        temp_amount = amount_lu;        temp_scalebits = scalebits_lu;        temp_halfscale = halfscale_lu;    } else if ((global_id >= width * height) && (global_id < width * height + ch * cw)) {        y = (global_id - width * height) / cw;        x = (global_id - width * height) % cw;        temp_dst = dst_u;        temp_src = src_u;        temp_src_stride = src_stride_ch;        temp_dst_stride = dst_stride_ch;        temp_height = ch;        temp_width = cw;        temp_steps_x = step_x_ch;        temp_steps_y = step_y_ch;        temp_mask = mask_ch;        temp_amount = amount_ch;        temp_scalebits = scalebits_ch;        temp_halfscale = halfscale_ch;    } else {        y = (global_id - width * height - ch * cw) / cw;        x = (global_id - width * height - ch * cw) % cw;        temp_dst = dst_v;        temp_src = src_v;        temp_src_stride = src_stride_ch;        temp_dst_stride = dst_stride_ch;        temp_height = ch;        temp_width = cw;        temp_steps_x = step_x_ch;        temp_steps_y = step_y_ch;        temp_mask = mask_ch;        temp_amount = amount_ch;        temp_scalebits = scalebits_ch;        temp_halfscale = halfscale_ch;    }    if (temp_amount) {        sum = 0;        for (j = 0; j <= 2 * temp_steps_y; j++) {            idx_y = (y - temp_steps_y + j) <= 0 ? 0 : (y - temp_steps_y + j) >= temp_height ? temp_height-1 : y - temp_steps_y + j;            for (i = 0; i <= 2 * temp_steps_x; i++) {                idx_x = (x - temp_steps_x + i) <= 0 ? 0 : (x - temp_steps_x + i) >= temp_width ? temp_width-1 : x - temp_steps_x + i;                sum += temp_mask[i + j * (2 * temp_steps_x + 1)] * temp_src[idx_x + idx_y * temp_src_stride];            }        }        temp = (int)temp_src[x + y * temp_src_stride];        res = temp + (((temp - (int)((sum + temp_halfscale) >> temp_scalebits)) * temp_amount) >> 16);        temp_dst[x + y * temp_dst_stride] = clip_uint8(res);    } else {        temp_dst[x + y * temp_dst_stride] = temp_src[x + y * temp_src_stride];    }} ); #endif /* AVFILTER_UNSHARP_KERNEL_H */