mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2026-05-09 20:43:04 +02:00
Lynne
74 lines
2.4 KiB
GLSL
74 lines
2.4 KiB
GLSL
/*
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* Copyright 2025 (c) Niklas Haas
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma shader_stage(compute)
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#extension GL_EXT_shader_image_load_formatted : require
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#extension GL_EXT_nonuniform_qualifier : require
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#define VLPF_OFF 0
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#define VLPF_LIN 1
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#define VLPF_CMP 2
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layout (constant_id = 0) const int lowpass = 0;
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layout (constant_id = 1) const int planes = 0;
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layout (local_size_x_id = 253, local_size_y_id = 254, local_size_z_id = 255) in;
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layout (set = 0, binding = 0) uniform sampler2D top_field[];
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layout (set = 0, binding = 1) uniform sampler2D bot_field[];
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layout (set = 0, binding = 2) uniform writeonly image2D output_img[];
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vec4 get_line(sampler2D tex, const vec2 pos)
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{
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if (lowpass == VLPF_CMP) {
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return 0.75 * texture(tex, pos) +
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0.25 * texture(tex, pos - ivec2(0, 1)) +
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0.25 * texture(tex, pos + ivec2(0, 1)) +
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-0.125 * texture(tex, pos - ivec2(0, 2)) +
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-0.125 * texture(tex, pos + ivec2(0, 2));
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} else if (lowpass == VLPF_LIN) {
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return 0.50 * texture(tex, pos) +
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0.25 * texture(tex, pos - ivec2(0, 1)) +
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0.25 * texture(tex, pos + ivec2(0, 1));
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} else {
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return texture(tex, pos);
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}
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}
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void main()
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{
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ivec2 pos = ivec2(gl_GlobalInvocationID.xy);
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vec2 ipos = pos + vec2(0.5);
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for (int i = 0; i < planes; i++) {
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ivec2 size = imageSize(output_img[i]);
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if (any(greaterThanEqual(pos, size)))
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return;
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vec4 res;
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if ((pos.y % 2) == 0)
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res = get_line(top_field[i], ipos);
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else
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res = get_line(bot_field[i], ipos);
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imageStore(output_img[i], pos, res);
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}
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}
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