1/* GStreamer 2 * Copyright (C) 2020 Matthew Waters <matthew@centricular.com> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public 15 * License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 17 * Boston, MA 02111-1307, USA. 18 */ 19 20vec3 upsample_YUY2(in sampler2D tex, in vec2 texCoord, in vec2 texSize, in ivec4 inReorderIdx) 21{ 22 vec2 dx = vec2(-1.0 / texSize.x, 0.0); 23 if (mod (texCoord.x * texSize.x, 2.0) < 1.0) { 24 dx[1] = -dx[0]; 25 dx[0] = 0.0; 26 } 27 28 vec3 yuv; 29 yuv.x = texture(tex, texCoord)[inReorderIdx[0]]; 30 /* FIXME: should get cosited sampling right... */ 31 vec4 texel; 32 texel.xy = texture(tex, texCoord + vec2(dx[0], 0.0)).rg; 33 texel.zw = texture(tex, texCoord + vec2(dx[1], 0.0)).rg; 34 yuv.y = texel[inReorderIdx[1]]; 35 yuv.z = texel[inReorderIdx[3]]; 36 37 return yuv; 38} 39