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Diffstat (limited to 'libavfilter/deshake_kernel.h')
| -rw-r--r-- | libavfilter/deshake_kernel.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/libavfilter/deshake_kernel.h b/libavfilter/deshake_kernel.h new file mode 100644 index 0000000..335a77e --- /dev/null +++ b/libavfilter/deshake_kernel.h @@ -0,0 +1,219 @@ +/* + * 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_DESHAKE_KERNEL_H +#define AVFILTER_DESHAKE_KERNEL_H + +#include "libavutil/opencl.h" + +const char *ff_kernel_deshake_opencl = AV_OPENCL_KERNEL( + +inline unsigned char pixel(global const unsigned char *src, float x, float y, + int w, int h,int stride, unsigned char def) +{ + return (x < 0 || y < 0 || x >= w || y >= h) ? def : src[(int)x + (int)y * stride]; +} +unsigned char interpolate_nearest(float x, float y, global const unsigned char *src, + int width, int height, int stride, unsigned char def) +{ + return pixel(src, (int)(x + 0.5), (int)(y + 0.5), width, height, stride, def); +} + +unsigned char interpolate_bilinear(float x, float y, global const unsigned char *src, + int width, int height, int stride, unsigned char def) +{ + int x_c, x_f, y_c, y_f; + int v1, v2, v3, v4; + + if (x < -1 || x > width || y < -1 || y > height) { + return def; + } else { + x_f = (int)x; + x_c = x_f + 1; + + y_f = (int)y; + y_c = y_f + 1; + + v1 = pixel(src, x_c, y_c, width, height, stride, def); + v2 = pixel(src, x_c, y_f, width, height, stride, def); + v3 = pixel(src, x_f, y_c, width, height, stride, def); + v4 = pixel(src, x_f, y_f, width, height, stride, def); + + return (v1*(x - x_f)*(y - y_f) + v2*((x - x_f)*(y_c - y)) + + v3*(x_c - x)*(y - y_f) + v4*((x_c - x)*(y_c - y))); + } +} + +unsigned char interpolate_biquadratic(float x, float y, global const unsigned char *src, + int width, int height, int stride, unsigned char def) +{ + int x_c, x_f, y_c, y_f; + unsigned char v1, v2, v3, v4; + float f1, f2, f3, f4; + + if (x < - 1 || x > width || y < -1 || y > height) + return def; + else { + x_f = (int)x; + x_c = x_f + 1; + y_f = (int)y; + y_c = y_f + 1; + + v1 = pixel(src, x_c, y_c, width, height, stride, def); + v2 = pixel(src, x_c, y_f, width, height, stride, def); + v3 = pixel(src, x_f, y_c, width, height, stride, def); + v4 = pixel(src, x_f, y_f, width, height, stride, def); + + f1 = 1 - sqrt((x_c - x) * (y_c - y)); + f2 = 1 - sqrt((x_c - x) * (y - y_f)); + f3 = 1 - sqrt((x - x_f) * (y_c - y)); + f4 = 1 - sqrt((x - x_f) * (y - y_f)); + return (v1 * f1 + v2 * f2 + v3 * f3 + v4 * f4) / (f1 + f2 + f3 + f4); + } +} + +inline const float clipf(float a, float amin, float amax) +{ + if (a < amin) return amin; + else if (a > amax) return amax; + else return a; +} + +inline int mirror(int v, int m) +{ + while ((unsigned)v > (unsigned)m) { + v = -v; + if (v < 0) + v += 2 * m; + } + return v; +} + +kernel void avfilter_transform(global unsigned char *src, + global unsigned char *dst, + global float *matrix, + global float *matrix2, + int interpolate, + int fillmethod, + int src_stride_lu, + int dst_stride_lu, + int src_stride_ch, + int dst_stride_ch, + int height, + int width, + int ch, + int cw) +{ + int global_id = get_global_id(0); + + 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 *tempdst; + global unsigned char *tempsrc; + + int x; + int y; + float x_s; + float y_s; + int tempsrc_stride; + int tempdst_stride; + int temp_height; + int temp_width; + int curpos; + unsigned char def = 0; + if (global_id < width*height) { + y = global_id/width; + x = global_id%width; + x_s = x * matrix[0] + y * matrix[1] + matrix[2]; + y_s = x * matrix[3] + y * matrix[4] + matrix[5]; + tempdst = dst_y; + tempsrc = src_y; + tempsrc_stride = src_stride_lu; + tempdst_stride = dst_stride_lu; + temp_height = height; + temp_width = width; + } else if ((global_id >= width*height)&&(global_id < width*height + ch*cw)) { + y = (global_id - width*height)/cw; + x = (global_id - width*height)%cw; + x_s = x * matrix2[0] + y * matrix2[1] + matrix2[2]; + y_s = x * matrix2[3] + y * matrix2[4] + matrix2[5]; + tempdst = dst_u; + tempsrc = src_u; + tempsrc_stride = src_stride_ch; + tempdst_stride = dst_stride_ch; + temp_height = height; + temp_width = width; + temp_height = ch; + temp_width = cw; + } else { + y = (global_id - width*height - ch*cw)/cw; + x = (global_id - width*height - ch*cw)%cw; + x_s = x * matrix2[0] + y * matrix2[1] + matrix2[2]; + y_s = x * matrix2[3] + y * matrix2[4] + matrix2[5]; + tempdst = dst_v; + tempsrc = src_v; + tempsrc_stride = src_stride_ch; + tempdst_stride = dst_stride_ch; + temp_height = ch; + temp_width = cw; + } + curpos = y * tempdst_stride + x; + switch (fillmethod) { + case 0: //FILL_BLANK + def = 0; + break; + case 1: //FILL_ORIGINAL + def = tempsrc[y*tempsrc_stride+x]; + break; + case 2: //FILL_CLAMP + y_s = clipf(y_s, 0, temp_height - 1); + x_s = clipf(x_s, 0, temp_width - 1); + def = tempsrc[(int)y_s * tempsrc_stride + (int)x_s]; + break; + case 3: //FILL_MIRROR + y_s = mirror(y_s,temp_height - 1); + x_s = mirror(x_s,temp_width - 1); + def = tempsrc[(int)y_s * tempsrc_stride + (int)x_s]; + break; + } + switch (interpolate) { + case 0: //INTERPOLATE_NEAREST + tempdst[curpos] = interpolate_nearest(x_s, y_s, tempsrc, temp_width, temp_height, tempsrc_stride, def); + break; + case 1: //INTERPOLATE_BILINEAR + tempdst[curpos] = interpolate_bilinear(x_s, y_s, tempsrc, temp_width, temp_height, tempsrc_stride, def); + break; + case 2: //INTERPOLATE_BIQUADRATIC + tempdst[curpos] = interpolate_biquadratic(x_s, y_s, tempsrc, temp_width, temp_height, tempsrc_stride, def); + break; + default: + return; + } +} +); + +#endif /* AVFILTER_DESHAKE_KERNEL_H */ |
