blob: 4320abe4c66b8622fff7d4f02f2f7b106ee96492 (
plain)
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
|
// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "lib/jpegli/dct.h"
#include <cmath>
#undef HWY_TARGET_INCLUDE
#define HWY_TARGET_INCLUDE "lib/jpegli/dct.cc"
#include <hwy/foreach_target.h>
#include <hwy/highway.h>
#include "lib/jpegli/dct-inl.h"
#include "lib/jpegli/encode_internal.h"
#include "lib/jpegli/memory_manager.h"
HWY_BEFORE_NAMESPACE();
namespace jpegli {
namespace HWY_NAMESPACE {
namespace {
void ComputeDCTCoefficients(j_compress_ptr cinfo) {
jpeg_comp_master* m = cinfo->master;
float* tmp = m->dct_buffer;
for (int c = 0; c < cinfo->num_components; c++) {
jpeg_component_info* comp = &cinfo->comp_info[c];
int by0 = m->next_iMCU_row * comp->v_samp_factor;
int block_rows_left = comp->height_in_blocks - by0;
int max_block_rows = std::min(comp->v_samp_factor, block_rows_left);
JBLOCKARRAY ba = (*cinfo->mem->access_virt_barray)(
reinterpret_cast<j_common_ptr>(cinfo), m->coeff_buffers[c], by0,
max_block_rows, true);
float* qmc = m->quant_mul[c];
RowBuffer<float>* plane = m->raw_data[c];
const int h_factor = m->h_factor[c];
const int v_factor = m->v_factor[c];
const float* zero_bias_offset = m->zero_bias_offset[c];
const float* zero_bias_mul = m->zero_bias_mul[c];
float aq_strength = 0.0f;
for (int iy = 0; iy < comp->v_samp_factor; iy++) {
size_t by = by0 + iy;
if (by >= comp->height_in_blocks) continue;
JBLOCKROW brow = ba[iy];
const float* row = plane->Row(8 * by);
for (size_t bx = 0; bx < comp->width_in_blocks; bx++) {
JCOEF* block = &brow[bx][0];
if (m->use_adaptive_quantization) {
aq_strength = m->quant_field.Row(by * v_factor)[bx * h_factor];
}
ComputeCoefficientBlock(row + 8 * bx, plane->stride(), qmc, aq_strength,
zero_bias_offset, zero_bias_mul, tmp, block);
}
}
}
}
// NOLINTNEXTLINE(google-readability-namespace-comments)
} // namespace
} // namespace HWY_NAMESPACE
} // namespace jpegli
HWY_AFTER_NAMESPACE();
#if HWY_ONCE
namespace jpegli {
HWY_EXPORT(ComputeDCTCoefficients);
void ComputeDCTCoefficients(j_compress_ptr cinfo) {
HWY_DYNAMIC_DISPATCH(ComputeDCTCoefficients)(cinfo);
}
} // namespace jpegli
#endif // HWY_ONCE
|
