1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*
* Copyright (c) 2025 Lynne <dev@lynne.ee>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma shader_stage(compute)
#extension GL_GOOGLE_include_directive : require
#include "common.glsl"
layout (constant_id = 0) const bool big_endian = false;
layout (constant_id = 1) const int type_bits = 0;
layout (set = 0, binding = 0) uniform writeonly uimage2D dst[];
layout (set = 0, binding = 1, scalar) readonly buffer data_buf8 {
uint8_t data8[];
};
layout (set = 0, binding = 2, scalar) readonly buffer data_buf16 {
uint16_t data16[];
};
layout (set = 0, binding = 3, scalar) readonly buffer data_buf32 {
uint32_t data32[];
};
layout (push_constant, scalar) uniform pushConstants {
int bits_per_comp;
int nb_comp;
int nb_images;
int stride;
int need_align;
int padded_10bit;
int shift;
};
#define READ_FN(bits, bytes) \
uint read_val##bits(uint off) \
{ \
if (big_endian) \
return uint(reverse##bytes(data##bits[off])); \
return uint(data##bits[off]); \
}
READ_FN(16, 2)
READ_FN(32, 4)
uint read_data(uint off)
{
if (type_bits == 8)
return uint(data8[off]);
else if (type_bits == 16)
return read_val16(off);
return read_val32(off);
}
void main(void)
{
ivec2 pos = ivec2(gl_GlobalInvocationID.xy);
ivec2 size = imageSize(dst[0]);
if (any(greaterThanEqual(pos, size)))
return;
uint linesize;
linesize = align(size.x*bits_per_comp*nb_comp, 32);
uint offs = pos.y*linesize + pos.x*nb_comp*bits_per_comp;
offs /= bits_per_comp;
if (nb_images == 1) {
uvec4 val;
for (int i = 0; i < nb_comp; i++)
val[i] = read_data(offs + i);
val >>= shift;
imageStore(dst[0], pos, val);
} else {
const ivec4 fmt_lut = ivec4(2, 0, 1, 3);
for (int i = 0; i < nb_comp; i++) {
uint32_t val = read_data(offs + i);
val >>= shift;
imageStore(dst[fmt_lut[i]], pos, uvec4(val));
}
}
}
|
