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ojph_codestream_gen.cpp
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//***************************************************************************/
// This software is released under the 2-Clause BSD license, included
// below.
//
// Copyright (c) 2022, Aous Naman
// Copyright (c) 2022, Kakadu Software Pty Ltd, Australia
// Copyright (c) 2022, The University of New South Wales, Australia
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//***************************************************************************/
// This file is part of the OpenJPH software implementation.
// File: ojph_codestream_gen.cpp
// Author: Aous Naman
// Date: 15 May 2022
//***************************************************************************/
#include <climits>
#include "ojph_defs.h"
#include "ojph_arch.h"
namespace ojph {
namespace local {
void gen_mem_clear(void* addr, size_t count)
{
si64* p = (si64*)addr;
for (size_t i = 0; i < count; i += 8)
*p++ = 0;
}
ui32 gen_find_max_val32(ui32* addr) { return addr[0]; }
ui64 gen_find_max_val64(ui64* addr) { return addr[0]; }
void gen_rev_tx_to_cb32(const void *sp, ui32 *dp, ui32 K_max,
float delta_inv, ui32 count,
ui32* max_val)
{
ojph_unused(delta_inv);
ui32 shift = 31 - K_max;
// convert to sign and magnitude and keep max_val
ui32 tmax = *max_val;
si32 *p = (si32*)sp;
for (ui32 i = count; i > 0; --i)
{
si32 v = *p++;
ui32 sign = v >= 0 ? 0U : 0x80000000U;
ui32 val = (ui32)(v >= 0 ? v : -v);
val <<= shift;
*dp++ = sign | val;
tmax |= val; // it is more efficient to use or than max
}
*max_val = tmax;
}
void gen_rev_tx_to_cb64(const void *sp, ui64 *dp, ui32 K_max,
float delta_inv, ui32 count,
ui64* max_val)
{
ojph_unused(delta_inv);
ui32 shift = 63 - K_max;
// convert to sign and magnitude and keep max_val
ui64 tmax = *max_val;
si64 *p = (si64*)sp;
for (ui32 i = count; i > 0; --i)
{
si64 v = *p++;
ui64 sign = v >= 0 ? 0ULL : 0x8000000000000000ULL;
ui64 val = (ui64)(v >= 0 ? v : -v);
val <<= shift;
*dp++ = sign | val;
tmax |= val; // it is more efficient to use or than max
}
*max_val = tmax;
}
void gen_irv_tx_to_cb32(const void *sp, ui32 *dp, ui32 K_max,
float delta_inv, ui32 count,
ui32* max_val)
{
ojph_unused(K_max);
//quantize and convert to sign and magnitude and keep max_val
ui32 tmax = *max_val;
float *p = (float*)sp;
for (ui32 i = count; i > 0; --i)
{
float v = *p++;
si32 t = ojph_trunc(v * delta_inv);
ui32 sign = t >= 0 ? 0U : 0x80000000U;
ui32 val = (ui32)(t >= 0 ? t : -t);
*dp++ = sign | val;
tmax |= val; // it is more efficient to use or than max
}
*max_val = tmax;
}
void gen_rev_tx_from_cb32(const ui32 *sp, void *dp, ui32 K_max,
float delta, ui32 count)
{
ojph_unused(delta);
ui32 shift = 31 - K_max;
//convert to sign and magnitude
si32 *p = (si32*)dp;
for (ui32 i = count; i > 0; --i)
{
ui32 v = *sp++;
si32 val = (v & 0x7FFFFFFFU) >> shift;
*p++ = (v & 0x80000000U) ? -val : val;
}
}
void gen_rev_tx_from_cb64(const ui64 *sp, void *dp, ui32 K_max,
float delta, ui32 count)
{
ojph_unused(delta);
ui32 shift = 63 - K_max;
//convert to sign and magnitude
si64 *p = (si64*)dp;
for (ui32 i = count; i > 0; --i)
{
ui64 v = *sp++;
si64 val = (v & 0x7FFFFFFFFFFFFFFFULL) >> shift;
*p++ = (v & 0x8000000000000000ULL) ? -val : val;
}
}
void gen_irv_tx_from_cb32(const ui32 *sp, void *dp, ui32 K_max,
float delta, ui32 count)
{
ojph_unused(K_max);
//convert to sign and magnitude
float *p = (float*)dp;
for (ui32 i = count; i > 0; --i)
{
ui32 v = *sp++;
float val = (float)(v & 0x7FFFFFFFU) * delta;
*p++ = (v & 0x80000000U) ? -val : val;
}
}
void gen_irv_tx_from_cb64(const ui64 *sp, void *dp, ui32 K_max,
float delta, ui32 count)
{
ojph_unused(K_max);
//convert to sign and magnitude
float *p = (float*)dp;
for (ui32 i = count; i > 0; --i)
{
ui64 v = *sp++;
float val = (float)(v & LLONG_MAX) * delta;
*p++ = (v & (ui64)LLONG_MIN) ? -val : val;
}
}
}
}
ojph::local
Definition ojph_bitbuffer_read.h:52
ojph::local::gen_irv_tx_from_cb64
void gen_irv_tx_from_cb64(const ui64 *sp, void *dp, ui32 K_max, float delta, ui32 count)
Definition ojph_codestream_gen.cpp:173
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:83
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:158
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:105
ojph::local::gen_mem_clear
void gen_mem_clear(void *addr, size_t count)
Definition ojph_codestream_gen.cpp:47
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:142
ojph::local::gen_find_max_val64
ui64 gen_find_max_val64(ui64 *address)
Definition ojph_codestream_gen.cpp:58
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:126
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:61
ojph::local::gen_find_max_val32
ui32 gen_find_max_val32(ui32 *address)
Definition ojph_codestream_gen.cpp:55
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:312
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