mirror of
https://git.ffmpeg.org/ffmpeg.git
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129 lines
4.5 KiB
GLSL
129 lines
4.5 KiB
GLSL
/*
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*
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* Copyright (c) 2025 Lynne <dev@lynne.ee>
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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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#version 460
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#pragma shader_stage(compute)
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#extension GL_EXT_shader_image_load_formatted : require
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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 readonly image2D src;
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layout (set = 0, binding = 1) uniform writeonly image2D dst;
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layout (constant_id = 0) const int debayer_mode = 0;
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layout(push_constant, std430) uniform pushConstants {
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mat4 yuv_matrix;
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int crop_x;
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int crop_y;
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int crop_w;
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int crop_h;
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};
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#define LD(xo, yo) \
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(imageLoad(src, pos + ivec2((xo), (yo))).r)
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void debayer_bilinear(ivec2 pos)
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{
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/* R basis */
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vec4 tl = vec4(LD(0, 0),
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(LD(1, 0) + LD(-1, 0) + LD(0, 1) + LD(0, -1)) / 4.0f,
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(LD(-1, -1) + LD(1, 1) + LD(-1, 1) + LD(1, -1)) / 4.0f,
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1.0f);
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imageStore(dst, pos, tl);
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/* G1 basis */
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vec4 tr = vec4((LD(2, 0) + LD(0, 0)) / 2.0f,
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LD(1, 0),
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(LD(1, 1) + LD(1, -1)) / 2.0f,
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1.0f);
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imageStore(dst, pos + ivec2(1, 0), tr);
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/* G2 basis */
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vec4 bl = vec4((LD(0, 2) + LD(0, 0)) / 2.0f,
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LD(0, 1),
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(LD(1, 1) + LD(-1, 1)) / 2.0f,
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1.0f);
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imageStore(dst, pos + ivec2(0, 1), bl);
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/* B basis */
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vec4 br = vec4((LD(0, 0) + LD(2, 2) + LD(0, 2) + LD(2, 0)) / 4.0f,
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(LD(2, 1) + LD(0, 1) + LD(1, 2) + LD(1, 0)) / 4.0f,
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LD(1, 1),
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1.0f);
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imageStore(dst, pos + ivec2(1, 1), br);
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}
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void debayer_bilinear_hq(ivec2 pos)
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{
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/* R basis */
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vec4 tl = vec4(LD(0, 0),
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(4.0f*LD(0, 0) + 2.0f*(LD(0, -1) + LD(0, 1) + LD(-1, 0) + LD(1, 0)) -
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(LD(0, -2) + LD(0, 2) + LD(-2, 0) + LD(2, 0))) / 8.0f,
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(12.0f*LD(0, 0) + 4.0f*(LD(-1, -1) + LD(-1, 1) + LD(1, -1) + LD(1, 1)) -
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3.0f*(LD(0, -2) + LD(0, 2) + LD(-2, 0) + LD(2, 0))) / 16.0f,
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1.0f);
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imageStore(dst, pos, tl);
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/* G1 basis */
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vec4 tr = vec4((10.0f*LD(1, 0) + 8.0f*(LD(0, 0) + LD(2, 0)) -
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2.0f*(LD(0, -1) + LD(2, 1) + LD(0, 1) + LD(2, -1) + LD(-1, 0) + LD(3, 0)) +
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LD(1, -2) + LD(1, 2)) / 16.0f,
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LD(1, 0),
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(10.0f*LD(1, 0) + 8.0f*(LD(1, -1) + LD(1, 1)) -
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2.0f*(LD(0, -1) + LD(0, 1) + LD(2, -1) + LD(2, 1) + LD(1, -2) + LD(1, 2)) +
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LD(-1, 0) + LD(3, 0)) / 16.0f,
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1.0f);
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imageStore(dst, pos + ivec2(1, 0), tr);
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/* G2 basis */
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vec4 bl = vec4((10.0f*LD(0, 1) + 8.0f*(LD(0, 0) + LD(0, 2)) -
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2.0f*(LD(-1, 0) + LD(-1, 2) + LD(1, 0) + LD(1, 2) + LD(0, -1) + LD(0, 3)) +
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LD(-2, 1) + LD(2, 1)) / 16.0f,
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LD(0, 1),
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(10.0f*LD(0, 1) + 8.0f*(LD(-1, 1) + LD(1, 1)) -
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2.0f*(LD(-1, 0) + LD(1, 2) + LD(-1, 2) + LD(1, 0) + LD(-2, 1) + LD(2, 1)) +
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LD(0, -1) + LD(0, 3)) / 16.0f,
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1.0f);
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imageStore(dst, pos + ivec2(0, 1), bl);
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/* B basis */
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vec4 br = vec4((12.0f*LD(1, 1) + 4.0f*(LD(0, 0) + LD(0, 2) + LD(2, 0) + LD(2, 2)) -
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3.0f*(LD(1, -1) + LD(1, 3) + LD(-1, 1) + LD(3, 1))) / 16.0f,
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(4.0f*LD(1, 1) + 2.0f*(LD(1, 0) + LD(1, 2) + LD(0, 1) + LD(2, 1)) -
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(LD(1, -1) + LD(1, 3) + LD(-1, 1) + LD(3, 1))) / 8.0f,
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LD(1, 1),
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1.0f);
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imageStore(dst, pos + ivec2(1, 1), br);
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}
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void main(void)
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{
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ivec2 pos = ivec2(gl_GlobalInvocationID.xy) << 1;
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if (debayer_mode == 0)
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debayer_bilinear(pos);
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else
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debayer_bilinear_hq(pos);
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}
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