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https://git.ffmpeg.org/ffmpeg.git
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e51c549f6e
Its rarely respected by implementations, its fairly new (1 year old), and it has a scuffed define (neither glslc nor glslang enable the "GL_EXT_nontemporal_keyword" define if its enabled, unlike all other extensions).
95 lines
2.7 KiB
GLSL
95 lines
2.7 KiB
GLSL
/*
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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_GOOGLE_include_directive : require
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#include "common.comp"
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layout (constant_id = 0) const bool big_endian = false;
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layout (constant_id = 1) const int type_bits = 0;
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layout (set = 0, binding = 0) uniform writeonly uimage2D dst[];
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layout (set = 0, binding = 1, scalar) readonly buffer data_buf8 {
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uint8_t data8[];
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};
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layout (set = 0, binding = 2, scalar) readonly buffer data_buf16 {
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uint16_t data16[];
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};
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layout (set = 0, binding = 3, scalar) readonly buffer data_buf32 {
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uint32_t data32[];
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};
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layout (push_constant, scalar) uniform pushConstants {
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int bits_per_comp;
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int nb_comp;
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int nb_images;
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int stride;
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int need_align;
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int padded_10bit;
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int shift;
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};
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#define READ_FN(bits, bytes) \
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uint read_val##bits(uint off) \
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{ \
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if (big_endian) \
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return uint(reverse##bytes(data##bits[off])); \
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return uint(data##bits[off]); \
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}
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READ_FN(16, 2)
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READ_FN(32, 4)
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uint read_data(uint off)
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{
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if (type_bits == 8)
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return uint(data8[off]);
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else if (type_bits == 16)
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return read_val16(off);
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return read_val32(off);
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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);
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uint linesize;
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linesize = align(imageSize(dst[0]).x*bits_per_comp*nb_comp, 32);
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uint offs = pos.y*linesize + pos.x*nb_comp*bits_per_comp;
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offs /= bits_per_comp;
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if (nb_images == 1) {
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uvec4 val;
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for (int i = 0; i < nb_comp; i++)
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val[i] = read_data(offs + i);
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val >>= shift;
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imageStore(dst[0], pos, val);
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} else {
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const ivec4 fmt_lut = ivec4(2, 0, 1, 3);
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for (int i = 0; i < nb_comp; i++) {
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uint32_t val = read_data(offs + i);
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val >>= shift;
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imageStore(dst[fmt_lut[i]], pos, uvec4(val));
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}
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}
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}
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