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
|
// 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.
#ifndef LIB_JXL_DCT_UTIL_H_
#define LIB_JXL_DCT_UTIL_H_
#include <cstddef>
#include <cstdint>
#include <memory>
#include <type_traits>
#include "lib/jxl/base/common.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/image.h"
#include "lib/jxl/image_ops.h"
namespace jxl {
union ACPtr {
int32_t* ptr32;
int16_t* ptr16;
ACPtr() = default;
explicit ACPtr(int16_t* p) : ptr16(p) {}
explicit ACPtr(int32_t* p) : ptr32(p) {}
};
union ConstACPtr {
const int32_t* ptr32;
const int16_t* ptr16;
ConstACPtr() = default;
explicit ConstACPtr(const int16_t* p) : ptr16(p) {}
explicit ConstACPtr(const int32_t* p) : ptr32(p) {}
};
enum class ACType { k16 = 0, k32 = 1 };
class ACImage {
public:
virtual ~ACImage() = default;
virtual ACType Type() const = 0;
virtual ACPtr PlaneRow(size_t c, size_t y, size_t xbase) = 0;
virtual ConstACPtr PlaneRow(size_t c, size_t y, size_t xbase) const = 0;
virtual size_t PixelsPerRow() const = 0;
virtual void ZeroFill() = 0;
virtual void ZeroFillPlane(size_t c) = 0;
virtual bool IsEmpty() const = 0;
};
template <typename T>
class ACImageT final : public ACImage {
public:
ACImageT() = default;
static StatusOr<std::unique_ptr<ACImageT>> Make(size_t xsize, size_t ysize) {
static_assert(
std::is_same<T, int16_t>::value || std::is_same<T, int32_t>::value,
"ACImage must be either 32- or 16- bit");
std::unique_ptr<ACImageT> result = jxl::make_unique<ACImageT>();
JXL_ASSIGN_OR_RETURN(result->img_, Image3<T>::Create(xsize, ysize));
return result;
}
ACType Type() const override {
return sizeof(T) == 2 ? ACType::k16 : ACType::k32;
}
ACPtr PlaneRow(size_t c, size_t y, size_t xbase) override {
return ACPtr(img_.PlaneRow(c, y) + xbase);
}
ConstACPtr PlaneRow(size_t c, size_t y, size_t xbase) const override {
return ConstACPtr(img_.PlaneRow(c, y) + xbase);
}
size_t PixelsPerRow() const override { return img_.PixelsPerRow(); }
void ZeroFill() override { ZeroFillImage(&img_); }
void ZeroFillPlane(size_t c) override { ZeroFillImage(&img_.Plane(c)); }
bool IsEmpty() const override {
return img_.xsize() == 0 || img_.ysize() == 0;
}
private:
Image3<T> img_;
};
} // namespace jxl
#endif // LIB_JXL_DCT_UTIL_H_
|
