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#include "nw4r/snd/snd_EnvGenerator.h"
/* Original source:
* kiwi515/ogws
* src/nw4r/snd/snd_EnvGenerator.cpp
*/
/*******************************************************************************
* headers
*/
#include "common.h"
#include <nw4r/NW4RAssert.hpp>
/*******************************************************************************
* variables
*/
namespace nw4r { namespace snd { namespace detail
{
// .rodata
// clang-format off
s16 const EnvGenerator::DecibelSquareTable[DECIBEL_SQUARE_TABLE_SIZE] =
{
-723, -722, -721, -651, -601, -562, -530, -503,
-480, -460, -442, -425, -410, -396, -383, -371,
-360, -349, -339, -330, -321, -313, -305, -297,
-289, -282, -276, -269, -263, -257, -251, -245,
-239, -234, -229, -224, -219, -214, -210, -205,
-201, -196, -192, -188, -184, -180, -176, -173,
-169, -165, -162, -158, -155, -152, -149, -145,
-142, -139, -136, -133, -130, -127, -125, -122,
-119, -116, -114, -111, -109, -106, -103, -101,
-99, -96, -94, -91, -89, -87, -85, -82,
-80, -78, -76, -74, -72, -70, -68, -66,
-64, -62, -60, -58, -56, -54, -52, -50,
-49, -47, -45, -43, -42, -40, -38, -36,
-35, -33, -31, -30, -28, -27, -25, -23,
-22, -20, -19, -17, -16, -14, -13, -11,
-10, -8, -7, -6, -4, -3, -1, 0
};
// clang-format on
// .sdata2
f32 const volatile EnvGenerator::VOLUME_INIT = -90.4f;
}}} // namespace nw4r::snd::detail
/*******************************************************************************
* functions
*/
namespace nw4r { namespace snd { namespace detail {
EnvGenerator::EnvGenerator()
{
Init(VOLUME_INIT);
}
void EnvGenerator::Init(f32 initDecibel)
{
SetAttack(ATTACK_INIT);
SetHold(HOLD_INIT);
SetDecay(DECAY_INIT);
SetSustain(SUSTAIN_INIT);
SetRelease(RELEASE_INIT);
Reset(initDecibel);
}
void EnvGenerator::Reset(f32 initDecibel)
{
mValue = initDecibel * 10.0f;
mStatus = STATUS_ATTACK;
}
f32 EnvGenerator::GetValue() const
{
if (mStatus == STATUS_ATTACK && mAttack == 0.0f)
return 0.0f;
return mValue / 10.0f;
}
void EnvGenerator::Update(int msec)
{
switch (mStatus)
{
case STATUS_ATTACK:
while (msec > 0)
{
mValue *= mAttack;
msec--;
if (mValue > -1.0f / 32.0f)
{
mValue = 0.0f;
mStatus = STATUS_HOLD;
mHoldCounter = mHold;
break;
}
}
break;
case STATUS_HOLD:
if (msec < mHoldCounter)
{
mHoldCounter -= msec;
}
else
{
msec -= mHoldCounter;
mHoldCounter = 0;
mStatus = STATUS_DECAY;
}
if (mStatus != STATUS_DECAY)
break;
/* fallthrough */;
case STATUS_DECAY:
{
f32 sustainDecay = CalcDecibelSquare(mSustain);
mValue -= mDecay * msec;
if (mValue < sustainDecay)
{
mValue = sustainDecay;
mStatus = STATUS_SUSTAIN;
}
break;
}
case STATUS_SUSTAIN:
break;
case STATUS_RELEASE:
mValue -= mRelease * msec;
break;
}
}
void EnvGenerator::SetAttack(int attack)
{
// clang-format off
static f32 const attackTable[128] =
{
0.9992175f, 0.9984326f, 0.9976452f, 0.9968553f,
0.9960629f, 0.9952679f, 0.9944704f, 0.9936704f,
0.9928677f, 0.9920625f, 0.9912546f, 0.9904441f,
0.9896309f, 0.9888151f, 0.9879965f, 0.9871752f,
0.9863512f, 0.9855244f, 0.9846949f, 0.9838625f,
0.9830273f, 0.9821893f, 0.9813483f, 0.9805045f,
0.9796578f, 0.9788081f, 0.9779555f, 0.9770999f,
0.9762413f, 0.9753797f, 0.9745150f, 0.9736472f,
0.9727763f, 0.9719023f, 0.9710251f, 0.9701448f,
0.9692612f, 0.9683744f, 0.9674844f, 0.9665910f,
0.9656944f, 0.9647944f, 0.9638910f, 0.9629842f,
0.9620740f, 0.9611604f, 0.9602433f, 0.9593226f,
0.9583984f, 0.9574706f, 0.9565392f, 0.9556042f,
0.9546655f, 0.9537231f, 0.9527769f, 0.9518270f,
0.9508732f, 0.9499157f, 0.9489542f, 0.9479888f,
0.9470195f, 0.9460462f, 0.9450689f, 0.9440875f,
0.9431020f, 0.9421124f, 0.9411186f, 0.9401206f,
0.9391184f, 0.9381118f, 0.9371009f, 0.9360856f,
0.9350659f, 0.9340417f, 0.9330131f, 0.9319798f,
0.9309420f, 0.9298995f, 0.9288523f, 0.9278004f,
0.9267436f, 0.9256821f, 0.9246156f, 0.9235442f,
0.9224678f, 0.9213864f, 0.9202998f, 0.9192081f,
0.9181112f, 0.9170091f, 0.9159016f, 0.9147887f,
0.9136703f, 0.9125465f, 0.9114171f, 0.9102821f,
0.9091414f, 0.9079949f, 0.9068427f, 0.9056845f,
0.9045204f, 0.9033502f, 0.9021740f, 0.9009916f,
0.8998029f, 0.8986080f, 0.8974066f, 0.8961988f,
0.8949844f, 0.8900599f, 0.8824622f, 0.8759247f,
0.8691861f, 0.8636406f, 0.8535788f, 0.8430189f,
0.8286135f, 0.8149099f, 0.8002172f, 0.7780663f,
0.7554750f, 0.7242125f, 0.6828239f, 0.6329169f,
0.5592135f, 0.4551411f, 0.3298770f, 0.0000000f
};
// clang-format on
// specifically not the source variant
NW4RAssertHeaderClampedLRValue_Line(263, attack, 0, 127);
mAttack = attackTable[attack];
}
void EnvGenerator::SetHold(int hold)
{
// specifically not the source variant
NW4RAssertHeaderClampedLRValue_Line(278, hold, 0, 127);
mHold = ((hold + 1) * (hold + 1)) / 4;
}
void EnvGenerator::SetDecay(int decay)
{
// specifically not the source variant
NW4RAssertHeaderClampedLRValue_Line(294, decay, 0, 127);
mDecay = CalcRelease(decay);
}
void EnvGenerator::SetSustain(int sustain)
{
// specifically not the source variant
NW4RAssertHeaderClampedLRValue_Line(310, sustain, 0, 127);
mSustain = sustain;
}
void EnvGenerator::SetRelease(int release)
{
// specifically not the source variant
NW4RAssertHeaderClampedLRValue_Line(326, release, 0, 127);
mRelease = CalcRelease(release);
}
f32 EnvGenerator::CalcRelease(int release)
{
// specifically not the source variant
NW4RAssertHeaderClampedLRValue_Line(337, release, 0, 127);
if (release == 127)
return 65535.0f;
if (release == 127 - 1)
return 24.0f;
if (release < 50)
return (release * 2 + 1) / 128.0f / 5.0f;
else
return 60.0f / (127 - 1 - release) / 5.0f;
}
s16 EnvGenerator::CalcDecibelSquare(int scale)
{
// specifically not the source variant
NW4RAssertHeaderClampedLRValue_Line(352, scale, 0, 127);
return DecibelSquareTable[scale];
}
}}} // namespace nw4r::snd::detail
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