You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
196 lines
3.7 KiB
196 lines
3.7 KiB
/*****************************************************************************/
|
|
// Copyright 2006-2008 Adobe Systems Incorporated
|
|
// All Rights Reserved.
|
|
//
|
|
// NOTICE: Adobe permits you to use, modify, and distribute this file in
|
|
// accordance with the terms of the Adobe license agreement accompanying it.
|
|
/*****************************************************************************/
|
|
|
|
/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_1d_table.cpp#1 $ */
|
|
/* $DateTime: 2012/05/30 13:28:51 $ */
|
|
/* $Change: 832332 $ */
|
|
/* $Author: tknoll $ */
|
|
|
|
/*****************************************************************************/
|
|
|
|
#include "dng_1d_table.h"
|
|
|
|
#include "dng_1d_function.h"
|
|
#include "dng_memory.h"
|
|
#include "dng_utils.h"
|
|
|
|
/*****************************************************************************/
|
|
|
|
dng_1d_table::dng_1d_table ()
|
|
|
|
: fBuffer ()
|
|
, fTable (NULL)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
dng_1d_table::~dng_1d_table ()
|
|
{
|
|
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
void dng_1d_table::SubDivide (const dng_1d_function &function,
|
|
uint32 lower,
|
|
uint32 upper,
|
|
real32 maxDelta)
|
|
{
|
|
|
|
uint32 range = upper - lower;
|
|
|
|
bool subDivide = (range > (kTableSize >> 8));
|
|
|
|
if (!subDivide)
|
|
{
|
|
|
|
real32 delta = Abs_real32 (fTable [upper] -
|
|
fTable [lower]);
|
|
|
|
if (delta > maxDelta)
|
|
{
|
|
|
|
subDivide = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (subDivide)
|
|
{
|
|
|
|
uint32 middle = (lower + upper) >> 1;
|
|
|
|
fTable [middle] = (real32) function.Evaluate (middle * (1.0 / (real64) kTableSize));
|
|
|
|
if (range > 2)
|
|
{
|
|
|
|
SubDivide (function, lower, middle, maxDelta);
|
|
|
|
SubDivide (function, middle, upper, maxDelta);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
{
|
|
|
|
real64 y0 = fTable [lower];
|
|
real64 y1 = fTable [upper];
|
|
|
|
real64 delta = (y1 - y0) / (real64) range;
|
|
|
|
for (uint32 j = lower + 1; j < upper; j++)
|
|
{
|
|
|
|
y0 += delta;
|
|
|
|
fTable [j] = (real32) y0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
void dng_1d_table::Initialize (dng_memory_allocator &allocator,
|
|
const dng_1d_function &function,
|
|
bool subSample)
|
|
{
|
|
|
|
fBuffer.Reset (allocator.Allocate ((kTableSize + 2) * sizeof (real32)));
|
|
|
|
fTable = fBuffer->Buffer_real32 ();
|
|
|
|
if (subSample)
|
|
{
|
|
|
|
fTable [0 ] = (real32) function.Evaluate (0.0);
|
|
fTable [kTableSize] = (real32) function.Evaluate (1.0);
|
|
|
|
real32 maxDelta = Max_real32 (Abs_real32 (fTable [kTableSize] -
|
|
fTable [0 ]), 1.0f) *
|
|
(1.0f / 256.0f);
|
|
|
|
SubDivide (function,
|
|
0,
|
|
kTableSize,
|
|
maxDelta);
|
|
|
|
}
|
|
|
|
else
|
|
{
|
|
|
|
for (uint32 j = 0; j <= kTableSize; j++)
|
|
{
|
|
|
|
real64 x = j * (1.0 / (real64) kTableSize);
|
|
|
|
real64 y = function.Evaluate (x);
|
|
|
|
fTable [j] = (real32) y;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
fTable [kTableSize + 1] = fTable [kTableSize];
|
|
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
void dng_1d_table::Expand16 (uint16 *table16) const
|
|
{
|
|
|
|
real64 step = (real64) kTableSize / 65535.0;
|
|
|
|
real64 y0 = fTable [0];
|
|
real64 y1 = fTable [1];
|
|
|
|
real64 base = y0 * 65535.0 + 0.5;
|
|
real64 slope = (y1 - y0) * 65535.0;
|
|
|
|
uint32 index = 1;
|
|
real64 fract = 0.0;
|
|
|
|
for (uint32 j = 0; j < 0x10000; j++)
|
|
{
|
|
|
|
table16 [j] = (uint16) (base + slope * fract);
|
|
|
|
fract += step;
|
|
|
|
if (fract > 1.0)
|
|
{
|
|
|
|
index += 1;
|
|
fract -= 1.0;
|
|
|
|
y0 = y1;
|
|
y1 = fTable [index];
|
|
|
|
base = y0 * 65535.0 + 0.5;
|
|
slope = (y1 - y0) * 65535.0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*****************************************************************************/
|