| 1 | /* |
| 2 | * Copyright (C) 2013 Wei Gao <weigao@multicorewareinc.com> |
| 3 | * Copyright (C) 2013 Lenny Wang |
| 4 | * |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #ifndef AVFILTER_DESHAKE_OPENCL_KERNEL_H |
| 24 | #define AVFILTER_DESHAKE_OPENCL_KERNEL_H |
| 25 | |
| 26 | #include "libavutil/opencl.h" |
| 27 | |
| 28 | const char *ff_kernel_deshake_opencl = AV_OPENCL_KERNEL( |
| 29 | inline unsigned char pixel(global const unsigned char *src, int x, int y, |
| 30 | int w, int h,int stride, unsigned char def) |
| 31 | { |
| 32 | return (x < 0 || y < 0 || x >= w || y >= h) ? def : src[x + y * stride]; |
| 33 | } |
| 34 | |
| 35 | unsigned char interpolate_nearest(float x, float y, global const unsigned char *src, |
| 36 | int width, int height, int stride, unsigned char def) |
| 37 | { |
| 38 | return pixel(src, (int)(x + 0.5f), (int)(y + 0.5f), width, height, stride, def); |
| 39 | } |
| 40 | |
| 41 | unsigned char interpolate_bilinear(float x, float y, global const unsigned char *src, |
| 42 | int width, int height, int stride, unsigned char def) |
| 43 | { |
| 44 | int x_c, x_f, y_c, y_f; |
| 45 | int v1, v2, v3, v4; |
| 46 | x_f = (int)x; |
| 47 | y_f = (int)y; |
| 48 | x_c = x_f + 1; |
| 49 | y_c = y_f + 1; |
| 50 | |
| 51 | if (x_f < -1 || x_f > width || y_f < -1 || y_f > height) { |
| 52 | return def; |
| 53 | } else { |
| 54 | v4 = pixel(src, x_f, y_f, width, height, stride, def); |
| 55 | v2 = pixel(src, x_c, y_f, width, height, stride, def); |
| 56 | v3 = pixel(src, x_f, y_c, width, height, stride, def); |
| 57 | v1 = pixel(src, x_c, y_c, width, height, stride, def); |
| 58 | return (v1*(x - x_f)*(y - y_f) + v2*((x - x_f)*(y_c - y)) + |
| 59 | v3*(x_c - x)*(y - y_f) + v4*((x_c - x)*(y_c - y))); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | unsigned char interpolate_biquadratic(float x, float y, global const unsigned char *src, |
| 64 | int width, int height, int stride, unsigned char def) |
| 65 | { |
| 66 | int x_c, x_f, y_c, y_f; |
| 67 | unsigned char v1, v2, v3, v4; |
| 68 | float f1, f2, f3, f4; |
| 69 | x_f = (int)x; |
| 70 | y_f = (int)y; |
| 71 | x_c = x_f + 1; |
| 72 | y_c = y_f + 1; |
| 73 | |
| 74 | if (x_f < - 1 || x_f > width || y_f < -1 || y_f > height) |
| 75 | return def; |
| 76 | else { |
| 77 | v4 = pixel(src, x_f, y_f, width, height, stride, def); |
| 78 | v2 = pixel(src, x_c, y_f, width, height, stride, def); |
| 79 | v3 = pixel(src, x_f, y_c, width, height, stride, def); |
| 80 | v1 = pixel(src, x_c, y_c, width, height, stride, def); |
| 81 | |
| 82 | f1 = 1 - sqrt((x_c - x) * (y_c - y)); |
| 83 | f2 = 1 - sqrt((x_c - x) * (y - y_f)); |
| 84 | f3 = 1 - sqrt((x - x_f) * (y_c - y)); |
| 85 | f4 = 1 - sqrt((x - x_f) * (y - y_f)); |
| 86 | return (v1 * f1 + v2 * f2 + v3 * f3 + v4 * f4) / (f1 + f2 + f3 + f4); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | inline const float clipf(float a, float amin, float amax) |
| 91 | { |
| 92 | if (a < amin) return amin; |
| 93 | else if (a > amax) return amax; |
| 94 | else return a; |
| 95 | } |
| 96 | |
| 97 | inline int mirror(int v, int m) |
| 98 | { |
| 99 | while ((unsigned)v > (unsigned)m) { |
| 100 | v = -v; |
| 101 | if (v < 0) |
| 102 | v += 2 * m; |
| 103 | } |
| 104 | return v; |
| 105 | } |
| 106 | |
| 107 | kernel void avfilter_transform_luma(global unsigned char *src, |
| 108 | global unsigned char *dst, |
| 109 | float4 matrix, |
| 110 | int interpolate, |
| 111 | int fill, |
| 112 | int src_stride_lu, |
| 113 | int dst_stride_lu, |
| 114 | int height, |
| 115 | int width) |
| 116 | { |
| 117 | int x = get_global_id(0); |
| 118 | int y = get_global_id(1); |
| 119 | int idx_dst = y * dst_stride_lu + x; |
| 120 | unsigned char def = 0; |
| 121 | float x_s = x * matrix.x + y * matrix.y + matrix.z; |
| 122 | float y_s = x * (-matrix.y) + y * matrix.x + matrix.w; |
| 123 | |
| 124 | if (x < width && y < height) { |
| 125 | switch (fill) { |
| 126 | case 0: //FILL_BLANK |
| 127 | def = 0; |
| 128 | break; |
| 129 | case 1: //FILL_ORIGINAL |
| 130 | def = src[y*src_stride_lu + x]; |
| 131 | break; |
| 132 | case 2: //FILL_CLAMP |
| 133 | y_s = clipf(y_s, 0, height - 1); |
| 134 | x_s = clipf(x_s, 0, width - 1); |
| 135 | def = src[(int)y_s * src_stride_lu + (int)x_s]; |
| 136 | break; |
| 137 | case 3: //FILL_MIRROR |
| 138 | y_s = mirror(y_s, height - 1); |
| 139 | x_s = mirror(x_s, width - 1); |
| 140 | def = src[(int)y_s * src_stride_lu + (int)x_s]; |
| 141 | break; |
| 142 | } |
| 143 | switch (interpolate) { |
| 144 | case 0: //INTERPOLATE_NEAREST |
| 145 | dst[idx_dst] = interpolate_nearest(x_s, y_s, src, width, height, src_stride_lu, def); |
| 146 | break; |
| 147 | case 1: //INTERPOLATE_BILINEAR |
| 148 | dst[idx_dst] = interpolate_bilinear(x_s, y_s, src, width, height, src_stride_lu, def); |
| 149 | break; |
| 150 | case 2: //INTERPOLATE_BIQUADRATIC |
| 151 | dst[idx_dst] = interpolate_biquadratic(x_s, y_s, src, width, height, src_stride_lu, def); |
| 152 | break; |
| 153 | default: |
| 154 | return; |
| 155 | } |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | kernel void avfilter_transform_chroma(global unsigned char *src, |
| 160 | global unsigned char *dst, |
| 161 | float4 matrix, |
| 162 | int interpolate, |
| 163 | int fill, |
| 164 | int src_stride_lu, |
| 165 | int dst_stride_lu, |
| 166 | int src_stride_ch, |
| 167 | int dst_stride_ch, |
| 168 | int height, |
| 169 | int width, |
| 170 | int ch, |
| 171 | int cw) |
| 172 | { |
| 173 | |
| 174 | int x = get_global_id(0); |
| 175 | int y = get_global_id(1); |
| 176 | int pad_ch = get_global_size(1)>>1; |
| 177 | global unsigned char *dst_u = dst + height * dst_stride_lu; |
| 178 | global unsigned char *src_u = src + height * src_stride_lu; |
| 179 | global unsigned char *dst_v = dst_u + ch * dst_stride_ch; |
| 180 | global unsigned char *src_v = src_u + ch * src_stride_ch; |
| 181 | src = y < pad_ch ? src_u : src_v; |
| 182 | dst = y < pad_ch ? dst_u : dst_v; |
| 183 | y = select(y - pad_ch, y, y < pad_ch); |
| 184 | float x_s = x * matrix.x + y * matrix.y + matrix.z; |
| 185 | float y_s = x * (-matrix.y) + y * matrix.x + matrix.w; |
| 186 | int idx_dst = y * dst_stride_ch + x; |
| 187 | unsigned char def; |
| 188 | |
| 189 | if (x < cw && y < ch) { |
| 190 | switch (fill) { |
| 191 | case 0: //FILL_BLANK |
| 192 | def = 0; |
| 193 | break; |
| 194 | case 1: //FILL_ORIGINAL |
| 195 | def = src[y*src_stride_ch + x]; |
| 196 | break; |
| 197 | case 2: //FILL_CLAMP |
| 198 | y_s = clipf(y_s, 0, ch - 1); |
| 199 | x_s = clipf(x_s, 0, cw - 1); |
| 200 | def = src[(int)y_s * src_stride_ch + (int)x_s]; |
| 201 | break; |
| 202 | case 3: //FILL_MIRROR |
| 203 | y_s = mirror(y_s, ch - 1); |
| 204 | x_s = mirror(x_s, cw - 1); |
| 205 | def = src[(int)y_s * src_stride_ch + (int)x_s]; |
| 206 | break; |
| 207 | } |
| 208 | switch (interpolate) { |
| 209 | case 0: //INTERPOLATE_NEAREST |
| 210 | dst[idx_dst] = interpolate_nearest(x_s, y_s, src, cw, ch, src_stride_ch, def); |
| 211 | break; |
| 212 | case 1: //INTERPOLATE_BILINEAR |
| 213 | dst[idx_dst] = interpolate_bilinear(x_s, y_s, src, cw, ch, src_stride_ch, def); |
| 214 | break; |
| 215 | case 2: //INTERPOLATE_BIQUADRATIC |
| 216 | dst[idx_dst] = interpolate_biquadratic(x_s, y_s, src, cw, ch, src_stride_ch, def); |
| 217 | break; |
| 218 | default: |
| 219 | return; |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | ); |
| 224 | |
| 225 | #endif /* AVFILTER_DESHAKE_OPENCL_KERNEL_H */ |