/* * Copyright (C) 2013 Wei Gao * Copyright (C) 2013 Lenny Wang * * * 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_OPENCL_KERNEL_H #define AVFILTER_DESHAKE_OPENCL_KERNEL_H #include "libavutil/opencl.h" const char *ff_kernel_deshake_opencl = AV_OPENCL_KERNEL( inline unsigned char pixel(global const unsigned char *src, int x, int y, int w, int h,int stride, unsigned char def) { return (x < 0 || y < 0 || x >= w || y >= h) ? def : src[x + 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 + 0.5f), (int)(y + 0.5f), 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; x_f = (int)x; y_f = (int)y; x_c = x_f + 1; y_c = y_f + 1; if (x_f < -1 || x_f > width || y_f < -1 || y_f > height) { return def; } else { v4 = pixel(src, x_f, y_f, 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); v1 = pixel(src, x_c, y_c, 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; x_f = (int)x; y_f = (int)y; x_c = x_f + 1; y_c = y_f + 1; if (x_f < - 1 || x_f > width || y_f < -1 || y_f > height) return def; else { v4 = pixel(src, x_f, y_f, 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); v1 = pixel(src, x_c, y_c, 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_luma(global unsigned char *src, global unsigned char *dst, float4 matrix, int interpolate, int fill, int src_stride_lu, int dst_stride_lu, int height, int width) { int x = get_global_id(0); int y = get_global_id(1); int idx_dst = y * dst_stride_lu + x; unsigned char def = 0; float x_s = x * matrix.x + y * matrix.y + matrix.z; float y_s = x * (-matrix.y) + y * matrix.x + matrix.w; if (x < width && y < height) { switch (fill) { case 0: //FILL_BLANK def = 0; break; case 1: //FILL_ORIGINAL def = src[y*src_stride_lu + x]; break; case 2: //FILL_CLAMP y_s = clipf(y_s, 0, height - 1); x_s = clipf(x_s, 0, width - 1); def = src[(int)y_s * src_stride_lu + (int)x_s]; break; case 3: //FILL_MIRROR y_s = mirror(y_s, height - 1); x_s = mirror(x_s, width - 1); def = src[(int)y_s * src_stride_lu + (int)x_s]; break; } switch (interpolate) { case 0: //INTERPOLATE_NEAREST dst[idx_dst] = interpolate_nearest(x_s, y_s, src, width, height, src_stride_lu, def); break; case 1: //INTERPOLATE_BILINEAR dst[idx_dst] = interpolate_bilinear(x_s, y_s, src, width, height, src_stride_lu, def); break; case 2: //INTERPOLATE_BIQUADRATIC dst[idx_dst] = interpolate_biquadratic(x_s, y_s, src, width, height, src_stride_lu, def); break; default: return; } } } kernel void avfilter_transform_chroma(global unsigned char *src, global unsigned char *dst, float4 matrix, int interpolate, int fill, 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 x = get_global_id(0); int y = get_global_id(1); int pad_ch = get_global_size(1)>>1; global unsigned char *dst_u = dst + height * dst_stride_lu; global unsigned char *src_u = src + height * src_stride_lu; global unsigned char *dst_v = dst_u + ch * dst_stride_ch; global unsigned char *src_v = src_u + ch * src_stride_ch; src = y < pad_ch ? src_u : src_v; dst = y < pad_ch ? dst_u : dst_v; y = select(y - pad_ch, y, y < pad_ch); float x_s = x * matrix.x + y * matrix.y + matrix.z; float y_s = x * (-matrix.y) + y * matrix.x + matrix.w; int idx_dst = y * dst_stride_ch + x; unsigned char def; if (x < cw && y < ch) { switch (fill) { case 0: //FILL_BLANK def = 0; break; case 1: //FILL_ORIGINAL def = src[y*src_stride_ch + x]; break; case 2: //FILL_CLAMP y_s = clipf(y_s, 0, ch - 1); x_s = clipf(x_s, 0, cw - 1); def = src[(int)y_s * src_stride_ch + (int)x_s]; break; case 3: //FILL_MIRROR y_s = mirror(y_s, ch - 1); x_s = mirror(x_s, cw - 1); def = src[(int)y_s * src_stride_ch + (int)x_s]; break; } switch (interpolate) { case 0: //INTERPOLATE_NEAREST dst[idx_dst] = interpolate_nearest(x_s, y_s, src, cw, ch, src_stride_ch, def); break; case 1: //INTERPOLATE_BILINEAR dst[idx_dst] = interpolate_bilinear(x_s, y_s, src, cw, ch, src_stride_ch, def); break; case 2: //INTERPOLATE_BIQUADRATIC dst[idx_dst] = interpolate_biquadratic(x_s, y_s, src, cw, ch, src_stride_ch, def); break; default: return; } } } ); #endif /* AVFILTER_DESHAKE_OPENCL_KERNEL_H */