OpenJPH Open-source implementation of JPEG2000 Part-15

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ojph_codestream_gen.cpp
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1//***************************************************************************/
2// This software is released under the 2-Clause BSD license, included
3// below.
4//
5// Copyright (c) 2022, Aous Naman
6// Copyright (c) 2022, Kakadu Software Pty Ltd, Australia
7// Copyright (c) 2022, The University of New South Wales, Australia
8//
9// Redistribution and use in source and binary forms, with or without
10// modification, are permitted provided that the following conditions are
11// met:
12//
13// 1. Redistributions of source code must retain the above copyright
14// notice, this list of conditions and the following disclaimer.
15//
16// 2. Redistributions in binary form must reproduce the above copyright
17// notice, this list of conditions and the following disclaimer in the
18// documentation and/or other materials provided with the distribution.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
23// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
26// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31//***************************************************************************/
32// This file is part of the OpenJPH software implementation.
33// File: ojph_codestream_gen.cpp
34// Author: Aous Naman
35// Date: 15 May 2022
36//***************************************************************************/
37
38#include "ojph_defs.h"
39#include "ojph_arch.h"
40
41 namespace ojph {
42 namespace local {
43
45 void gen_mem_clear(void* addr, size_t count)
46 {
47 si64* p = (si64*)addr;
48 for (size_t i = 0; i < count; i += 8)
49 *p++ = 0;
50 }
51
53 ui32 gen_find_max_val32(ui32* addr) { return addr[0]; }
54
56 ui64 gen_find_max_val64(ui64* addr) { return addr[0]; }
57
59 void gen_rev_tx_to_cb32(const void *sp, ui32 *dp, ui32 K_max,
60 float delta_inv, ui32 count,
61 ui32* max_val)
62 {
63 ojph_unused(delta_inv);
64 ui32 shift = 31 - K_max;
65 // convert to sign and magnitude and keep max_val
66 ui32 tmax = *max_val;
67 si32 *p = (si32*)sp;
68 for (ui32 i = count; i > 0; --i)
69 {
70 si32 v = *p++;
71 ui32 sign = v >= 0 ? 0U : 0x80000000U;
72 ui32 val = (ui32)(v >= 0 ? v : -v);
73 val <<= shift;
74 *dp++ = sign | val;
75 tmax |= val; // it is more efficient to use or than max
76 }
77 *max_val = tmax;
78 }
79
81 void gen_rev_tx_to_cb64(const void *sp, ui64 *dp, ui32 K_max,
82 float delta_inv, ui32 count,
83 ui64* max_val)
84 {
85 ojph_unused(delta_inv);
86 ui32 shift = 63 - K_max;
87 // convert to sign and magnitude and keep max_val
88 ui64 tmax = *max_val;
89 si64 *p = (si64*)sp;
90 for (ui32 i = count; i > 0; --i)
91 {
92 si64 v = *p++;
93 ui64 sign = v >= 0 ? 0ULL : 0x8000000000000000ULL;
94 ui64 val = (ui64)(v >= 0 ? v : -v);
95 val <<= shift;
96 *dp++ = sign | val;
97 tmax |= val; // it is more efficient to use or than max
98 }
99 *max_val = tmax;
100 }
101
103 void gen_irv_tx_to_cb32(const void *sp, ui32 *dp, ui32 K_max,
104 float delta_inv, ui32 count,
105 ui32* max_val)
106 {
107 ojph_unused(K_max);
108 //quantize and convert to sign and magnitude and keep max_val
109 ui32 tmax = *max_val;
110 float *p = (float*)sp;
111 for (ui32 i = count; i > 0; --i)
112 {
113 float v = *p++;
114 si32 t = ojph_trunc(v * delta_inv);
115 ui32 sign = t >= 0 ? 0U : 0x80000000U;
116 ui32 val = (ui32)(t >= 0 ? t : -t);
117 *dp++ = sign | val;
118 tmax |= val; // it is more efficient to use or than max
119 }
120 *max_val = tmax;
121 }
122
124 void gen_rev_tx_from_cb32(const ui32 *sp, void *dp, ui32 K_max,
125 float delta, ui32 count)
126 {
127 ojph_unused(delta);
128 ui32 shift = 31 - K_max;
129 //convert to sign and magnitude
130 si32 *p = (si32*)dp;
131 for (ui32 i = count; i > 0; --i)
132 {
133 ui32 v = *sp++;
134 si32 val = (v & 0x7FFFFFFFU) >> shift;
135 *p++ = (v & 0x80000000U) ? -val : val;
136 }
137 }
138
140 void gen_rev_tx_from_cb64(const ui64 *sp, void *dp, ui32 K_max,
141 float delta, ui32 count)
142 {
143 ojph_unused(delta);
144 ui32 shift = 63 - K_max;
145 //convert to sign and magnitude
146 si64 *p = (si64*)dp;
147 for (ui32 i = count; i > 0; --i)
148 {
149 ui64 v = *sp++;
150 si64 val = (v & 0x7FFFFFFFFFFFFFFFULL) >> shift;
151 *p++ = (v & 0x8000000000000000ULL) ? -val : val;
152 }
153 }
154
156 void gen_irv_tx_from_cb32(const ui32 *sp, void *dp, ui32 K_max,
157 float delta, ui32 count)
158 {
159 ojph_unused(K_max);
160 //convert to sign and magnitude
161 float *p = (float*)dp;
162 for (ui32 i = count; i > 0; --i)
163 {
164 ui32 v = *sp++;
165 float val = (float)(v & 0x7FFFFFFFU) * delta;
166 *p++ = (v & 0x80000000U) ? -val : val;
167 }
168 }
169
170 }
171}
ojph::local
Definition ojph_bitbuffer_read.h:52
ojph::local::gen_rev_tx_to_cb64
void gen_rev_tx_to_cb64(const void *sp, ui64 *dp, ui32 K_max, float delta_inv, ui32 count, ui64 *max_val)
Definition ojph_codestream_gen.cpp:81
ojph::local::gen_irv_tx_from_cb32
void gen_irv_tx_from_cb32(const ui32 *sp, void *dp, ui32 K_max, float delta, ui32 count)
Definition ojph_codestream_gen.cpp:156
ojph::local::gen_irv_tx_to_cb32
void gen_irv_tx_to_cb32(const void *sp, ui32 *dp, ui32 K_max, float delta_inv, ui32 count, ui32 *max_val)
Definition ojph_codestream_gen.cpp:103
ojph::local::gen_mem_clear
void gen_mem_clear(void *addr, size_t count)
Definition ojph_codestream_gen.cpp:45
ojph::local::gen_rev_tx_from_cb64
void gen_rev_tx_from_cb64(const ui64 *sp, void *dp, ui32 K_max, float delta, ui32 count)
Definition ojph_codestream_gen.cpp:140
ojph::local::gen_find_max_val64
ui64 gen_find_max_val64(ui64 *address)
Definition ojph_codestream_gen.cpp:56
ojph::local::gen_rev_tx_from_cb32
void gen_rev_tx_from_cb32(const ui32 *sp, void *dp, ui32 K_max, float delta, ui32 count)
Definition ojph_codestream_gen.cpp:124
ojph::local::gen_rev_tx_to_cb32
void gen_rev_tx_to_cb32(const void *sp, ui32 *dp, ui32 K_max, float delta_inv, ui32 count, ui32 *max_val)
Definition ojph_codestream_gen.cpp:59
ojph::local::gen_find_max_val32
ui32 gen_find_max_val32(ui32 *address)
Definition ojph_codestream_gen.cpp:53
ojph
Definition ojph_img_io.h:52
ojph::si64
int64_t si64
Definition ojph_defs.h:57
ojph::ui64
uint64_t ui64
Definition ojph_defs.h:56
ojph::ojph_trunc
static si32 ojph_trunc(float val)
Definition ojph_arch.h:271
ojph::si32
int32_t si32
Definition ojph_defs.h:55
ojph::ui32
uint32_t ui32
Definition ojph_defs.h:54
ojph_arch.h
ojph_defs.h
ojph_unused
#define ojph_unused(x)
Definition ojph_defs.h:78