project64/Source/Project64-rsp-core/Hle/mp3.cpp

// Project64 - A Nintendo 64 emulator
// https://www.pj64-emu.com/
// Copyright(C) 2001-2021 Project64
// Copyright(C) 2014 Bobby Smiles
// Copyright(C) 2009 Richard Goedeken
// Copyright(C) 2002 Hacktarux
// GNU/GPLv2 licensed: https://gnu.org/licenses/gpl-2.0.html

#include <stdint.h>
#include <string.h>

#include "arithmetics.h"
#include "mem.h"

static void InnerLoop(CHle * hle, uint32_t outPtr, uint32_t inPtr, uint32_t t6, uint32_t t5, uint32_t t4);

static const uint16_t DeWindowLUT[0x420] = {
    0x0000, 0xFFF3, 0x005D, 0xFF38, 0x037A, 0xF736, 0x0B37, 0xC00E,
    0x7FFF, 0x3FF2, 0x0B37, 0x08CA, 0x037A, 0x00C8, 0x005D, 0x000D,
    0x0000, 0xFFF3, 0x005D, 0xFF38, 0x037A, 0xF736, 0x0B37, 0xC00E,
    0x7FFF, 0x3FF2, 0x0B37, 0x08CA, 0x037A, 0x00C8, 0x005D, 0x000D,
    0x0000, 0xFFF2, 0x005F, 0xFF1D, 0x0369, 0xF697, 0x0A2A, 0xBCE7,
    0x7FEB, 0x3CCB, 0x0C2B, 0x082B, 0x0385, 0x00AF, 0x005B, 0x000B,
    0x0000, 0xFFF2, 0x005F, 0xFF1D, 0x0369, 0xF697, 0x0A2A, 0xBCE7,
    0x7FEB, 0x3CCB, 0x0C2B, 0x082B, 0x0385, 0x00AF, 0x005B, 0x000B,
    0x0000, 0xFFF1, 0x0061, 0xFF02, 0x0354, 0xF5F9, 0x0905, 0xB9C4,
    0x7FB0, 0x39A4, 0x0D08, 0x078C, 0x038C, 0x0098, 0x0058, 0x000A,
    0x0000, 0xFFF1, 0x0061, 0xFF02, 0x0354, 0xF5F9, 0x0905, 0xB9C4,
    0x7FB0, 0x39A4, 0x0D08, 0x078C, 0x038C, 0x0098, 0x0058, 0x000A,
    0x0000, 0xFFEF, 0x0062, 0xFEE6, 0x033B, 0xF55C, 0x07C8, 0xB6A4,
    0x7F4D, 0x367E, 0x0DCE, 0x06EE, 0x038F, 0x0080, 0x0056, 0x0009,
    0x0000, 0xFFEF, 0x0062, 0xFEE6, 0x033B, 0xF55C, 0x07C8, 0xB6A4,
    0x7F4D, 0x367E, 0x0DCE, 0x06EE, 0x038F, 0x0080, 0x0056, 0x0009,
    0x0000, 0xFFEE, 0x0063, 0xFECA, 0x031C, 0xF4C3, 0x0671, 0xB38C,
    0x7EC2, 0x335D, 0x0E7C, 0x0652, 0x038E, 0x006B, 0x0053, 0x0008,
    0x0000, 0xFFEE, 0x0063, 0xFECA, 0x031C, 0xF4C3, 0x0671, 0xB38C,
    0x7EC2, 0x335D, 0x0E7C, 0x0652, 0x038E, 0x006B, 0x0053, 0x0008,
    0x0000, 0xFFEC, 0x0064, 0xFEAC, 0x02F7, 0xF42C, 0x0502, 0xB07C,
    0x7E12, 0x3041, 0x0F14, 0x05B7, 0x038A, 0x0056, 0x0050, 0x0007,
    0x0000, 0xFFEC, 0x0064, 0xFEAC, 0x02F7, 0xF42C, 0x0502, 0xB07C,
    0x7E12, 0x3041, 0x0F14, 0x05B7, 0x038A, 0x0056, 0x0050, 0x0007,
    0x0000, 0xFFEB, 0x0064, 0xFE8E, 0x02CE, 0xF399, 0x037A, 0xAD75,
    0x7D3A, 0x2D2C, 0x0F97, 0x0520, 0x0382, 0x0043, 0x004D, 0x0007,
    0x0000, 0xFFEB, 0x0064, 0xFE8E, 0x02CE, 0xF399, 0x037A, 0xAD75,
    0x7D3A, 0x2D2C, 0x0F97, 0x0520, 0x0382, 0x0043, 0x004D, 0x0007,
    0xFFFF, 0xFFE9, 0x0063, 0xFE6F, 0x029E, 0xF30B, 0x01D8, 0xAA7B,
    0x7C3D, 0x2A1F, 0x1004, 0x048B, 0x0377, 0x0030, 0x004A, 0x0006,
    0xFFFF, 0xFFE9, 0x0063, 0xFE6F, 0x029E, 0xF30B, 0x01D8, 0xAA7B,
    0x7C3D, 0x2A1F, 0x1004, 0x048B, 0x0377, 0x0030, 0x004A, 0x0006,
    0xFFFF, 0xFFE7, 0x0062, 0xFE4F, 0x0269, 0xF282, 0x001F, 0xA78D,
    0x7B1A, 0x271C, 0x105D, 0x03F9, 0x036A, 0x001F, 0x0046, 0x0006,
    0xFFFF, 0xFFE7, 0x0062, 0xFE4F, 0x0269, 0xF282, 0x001F, 0xA78D,
    0x7B1A, 0x271C, 0x105D, 0x03F9, 0x036A, 0x001F, 0x0046, 0x0006,
    0xFFFF, 0xFFE4, 0x0061, 0xFE2F, 0x022F, 0xF1FF, 0xFE4C, 0xA4AF,
    0x79D3, 0x2425, 0x10A2, 0x036C, 0x0359, 0x0010, 0x0043, 0x0005,
    0xFFFF, 0xFFE4, 0x0061, 0xFE2F, 0x022F, 0xF1FF, 0xFE4C, 0xA4AF,
    0x79D3, 0x2425, 0x10A2, 0x036C, 0x0359, 0x0010, 0x0043, 0x0005,
    0xFFFF, 0xFFE2, 0x005E, 0xFE10, 0x01EE, 0xF184, 0xFC61, 0xA1E1,
    0x7869, 0x2139, 0x10D3, 0x02E3, 0x0346, 0x0001, 0x0040, 0x0004,
    0xFFFF, 0xFFE2, 0x005E, 0xFE10, 0x01EE, 0xF184, 0xFC61, 0xA1E1,
    0x7869, 0x2139, 0x10D3, 0x02E3, 0x0346, 0x0001, 0x0040, 0x0004,
    0xFFFF, 0xFFE0, 0x005B, 0xFDF0, 0x01A8, 0xF111, 0xFA5F, 0x9F27,
    0x76DB, 0x1E5C, 0x10F2, 0x025E, 0x0331, 0xFFF3, 0x003D, 0x0004,
    0xFFFF, 0xFFE0, 0x005B, 0xFDF0, 0x01A8, 0xF111, 0xFA5F, 0x9F27,
    0x76DB, 0x1E5C, 0x10F2, 0x025E, 0x0331, 0xFFF3, 0x003D, 0x0004,
    0xFFFF, 0xFFDE, 0x0057, 0xFDD0, 0x015B, 0xF0A7, 0xF845, 0x9C80,
    0x752C, 0x1B8E, 0x1100, 0x01DE, 0x0319, 0xFFE7, 0x003A, 0x0003,
    0xFFFF, 0xFFDE, 0x0057, 0xFDD0, 0x015B, 0xF0A7, 0xF845, 0x9C80,
    0x752C, 0x1B8E, 0x1100, 0x01DE, 0x0319, 0xFFE7, 0x003A, 0x0003,
    0xFFFE, 0xFFDB, 0x0053, 0xFDB0, 0x0108, 0xF046, 0xF613, 0x99EE,
    0x735C, 0x18D1, 0x10FD, 0x0163, 0x0300, 0xFFDC, 0x0037, 0x0003,
    0xFFFE, 0xFFDB, 0x0053, 0xFDB0, 0x0108, 0xF046, 0xF613, 0x99EE,
    0x735C, 0x18D1, 0x10FD, 0x0163, 0x0300, 0xFFDC, 0x0037, 0x0003,
    0xFFFE, 0xFFD8, 0x004D, 0xFD90, 0x00B0, 0xEFF0, 0xF3CC, 0x9775,
    0x716C, 0x1624, 0x10EA, 0x00EE, 0x02E5, 0xFFD2, 0x0033, 0x0003,
    0xFFFE, 0xFFD8, 0x004D, 0xFD90, 0x00B0, 0xEFF0, 0xF3CC, 0x9775,
    0x716C, 0x1624, 0x10EA, 0x00EE, 0x02E5, 0xFFD2, 0x0033, 0x0003,
    0xFFFE, 0xFFD6, 0x0047, 0xFD72, 0x0051, 0xEFA6, 0xF16F, 0x9514,
    0x6F5E, 0x138A, 0x10C8, 0x007E, 0x02CA, 0xFFC9, 0x0030, 0x0003,
    0xFFFE, 0xFFD6, 0x0047, 0xFD72, 0x0051, 0xEFA6, 0xF16F, 0x9514,
    0x6F5E, 0x138A, 0x10C8, 0x007E, 0x02CA, 0xFFC9, 0x0030, 0x0003,
    0xFFFE, 0xFFD3, 0x0040, 0xFD54, 0xFFEC, 0xEF68, 0xEEFC, 0x92CD,
    0x6D33, 0x1104, 0x1098, 0x0014, 0x02AC, 0xFFC0, 0x002D, 0x0002,
    0xFFFE, 0xFFD3, 0x0040, 0xFD54, 0xFFEC, 0xEF68, 0xEEFC, 0x92CD,
    0x6D33, 0x1104, 0x1098, 0x0014, 0x02AC, 0xFFC0, 0x002D, 0x0002,
    0x0030, 0xFFC9, 0x02CA, 0x007E, 0x10C8, 0x138A, 0x6F5E, 0x9514,
    0xF16F, 0xEFA6, 0x0051, 0xFD72, 0x0047, 0xFFD6, 0xFFFE, 0x0003,
    0x0030, 0xFFC9, 0x02CA, 0x007E, 0x10C8, 0x138A, 0x6F5E, 0x9514,
    0xF16F, 0xEFA6, 0x0051, 0xFD72, 0x0047, 0xFFD6, 0xFFFE, 0x0003,
    0x0033, 0xFFD2, 0x02E5, 0x00EE, 0x10EA, 0x1624, 0x716C, 0x9775,
    0xF3CC, 0xEFF0, 0x00B0, 0xFD90, 0x004D, 0xFFD8, 0xFFFE, 0x0003,
    0x0033, 0xFFD2, 0x02E5, 0x00EE, 0x10EA, 0x1624, 0x716C, 0x9775,
    0xF3CC, 0xEFF0, 0x00B0, 0xFD90, 0x004D, 0xFFD8, 0xFFFE, 0x0003,
    0x0037, 0xFFDC, 0x0300, 0x0163, 0x10FD, 0x18D1, 0x735C, 0x99EE,
    0xF613, 0xF046, 0x0108, 0xFDB0, 0x0053, 0xFFDB, 0xFFFE, 0x0003,
    0x0037, 0xFFDC, 0x0300, 0x0163, 0x10FD, 0x18D1, 0x735C, 0x99EE,
    0xF613, 0xF046, 0x0108, 0xFDB0, 0x0053, 0xFFDB, 0xFFFE, 0x0003,
    0x003A, 0xFFE7, 0x0319, 0x01DE, 0x1100, 0x1B8E, 0x752C, 0x9C80,
    0xF845, 0xF0A7, 0x015B, 0xFDD0, 0x0057, 0xFFDE, 0xFFFF, 0x0003,
    0x003A, 0xFFE7, 0x0319, 0x01DE, 0x1100, 0x1B8E, 0x752C, 0x9C80,
    0xF845, 0xF0A7, 0x015B, 0xFDD0, 0x0057, 0xFFDE, 0xFFFF, 0x0004,
    0x003D, 0xFFF3, 0x0331, 0x025E, 0x10F2, 0x1E5C, 0x76DB, 0x9F27,
    0xFA5F, 0xF111, 0x01A8, 0xFDF0, 0x005B, 0xFFE0, 0xFFFF, 0x0004,
    0x003D, 0xFFF3, 0x0331, 0x025E, 0x10F2, 0x1E5C, 0x76DB, 0x9F27,
    0xFA5F, 0xF111, 0x01A8, 0xFDF0, 0x005B, 0xFFE0, 0xFFFF, 0x0004,
    0x0040, 0x0001, 0x0346, 0x02E3, 0x10D3, 0x2139, 0x7869, 0xA1E1,
    0xFC61, 0xF184, 0x01EE, 0xFE10, 0x005E, 0xFFE2, 0xFFFF, 0x0004,
    0x0040, 0x0001, 0x0346, 0x02E3, 0x10D3, 0x2139, 0x7869, 0xA1E1,
    0xFC61, 0xF184, 0x01EE, 0xFE10, 0x005E, 0xFFE2, 0xFFFF, 0x0005,
    0x0043, 0x0010, 0x0359, 0x036C, 0x10A2, 0x2425, 0x79D3, 0xA4AF,
    0xFE4C, 0xF1FF, 0x022F, 0xFE2F, 0x0061, 0xFFE4, 0xFFFF, 0x0005,
    0x0043, 0x0010, 0x0359, 0x036C, 0x10A2, 0x2425, 0x79D3, 0xA4AF,
    0xFE4C, 0xF1FF, 0x022F, 0xFE2F, 0x0061, 0xFFE4, 0xFFFF, 0x0006,
    0x0046, 0x001F, 0x036A, 0x03F9, 0x105D, 0x271C, 0x7B1A, 0xA78D,
    0x001F, 0xF282, 0x0269, 0xFE4F, 0x0062, 0xFFE7, 0xFFFF, 0x0006,
    0x0046, 0x001F, 0x036A, 0x03F9, 0x105D, 0x271C, 0x7B1A, 0xA78D,
    0x001F, 0xF282, 0x0269, 0xFE4F, 0x0062, 0xFFE7, 0xFFFF, 0x0006,
    0x004A, 0x0030, 0x0377, 0x048B, 0x1004, 0x2A1F, 0x7C3D, 0xAA7B,
    0x01D8, 0xF30B, 0x029E, 0xFE6F, 0x0063, 0xFFE9, 0xFFFF, 0x0006,
    0x004A, 0x0030, 0x0377, 0x048B, 0x1004, 0x2A1F, 0x7C3D, 0xAA7B,
    0x01D8, 0xF30B, 0x029E, 0xFE6F, 0x0063, 0xFFE9, 0xFFFF, 0x0007,
    0x004D, 0x0043, 0x0382, 0x0520, 0x0F97, 0x2D2C, 0x7D3A, 0xAD75,
    0x037A, 0xF399, 0x02CE, 0xFE8E, 0x0064, 0xFFEB, 0x0000, 0x0007,
    0x004D, 0x0043, 0x0382, 0x0520, 0x0F97, 0x2D2C, 0x7D3A, 0xAD75,
    0x037A, 0xF399, 0x02CE, 0xFE8E, 0x0064, 0xFFEB, 0x0000, 0x0007,
    0x0050, 0x0056, 0x038A, 0x05B7, 0x0F14, 0x3041, 0x7E12, 0xB07C,
    0x0502, 0xF42C, 0x02F7, 0xFEAC, 0x0064, 0xFFEC, 0x0000, 0x0007,
    0x0050, 0x0056, 0x038A, 0x05B7, 0x0F14, 0x3041, 0x7E12, 0xB07C,
    0x0502, 0xF42C, 0x02F7, 0xFEAC, 0x0064, 0xFFEC, 0x0000, 0x0008,
    0x0053, 0x006B, 0x038E, 0x0652, 0x0E7C, 0x335D, 0x7EC2, 0xB38C,
    0x0671, 0xF4C3, 0x031C, 0xFECA, 0x0063, 0xFFEE, 0x0000, 0x0008,
    0x0053, 0x006B, 0x038E, 0x0652, 0x0E7C, 0x335D, 0x7EC2, 0xB38C,
    0x0671, 0xF4C3, 0x031C, 0xFECA, 0x0063, 0xFFEE, 0x0000, 0x0009,
    0x0056, 0x0080, 0x038F, 0x06EE, 0x0DCE, 0x367E, 0x7F4D, 0xB6A4,
    0x07C8, 0xF55C, 0x033B, 0xFEE6, 0x0062, 0xFFEF, 0x0000, 0x0009,
    0x0056, 0x0080, 0x038F, 0x06EE, 0x0DCE, 0x367E, 0x7F4D, 0xB6A4,
    0x07C8, 0xF55C, 0x033B, 0xFEE6, 0x0062, 0xFFEF, 0x0000, 0x000A,
    0x0058, 0x0098, 0x038C, 0x078C, 0x0D08, 0x39A4, 0x7FB0, 0xB9C4,
    0x0905, 0xF5F9, 0x0354, 0xFF02, 0x0061, 0xFFF1, 0x0000, 0x000A,
    0x0058, 0x0098, 0x038C, 0x078C, 0x0D08, 0x39A4, 0x7FB0, 0xB9C4,
    0x0905, 0xF5F9, 0x0354, 0xFF02, 0x0061, 0xFFF1, 0x0000, 0x000B,
    0x005B, 0x00AF, 0x0385, 0x082B, 0x0C2B, 0x3CCB, 0x7FEB, 0xBCE7,
    0x0A2A, 0xF697, 0x0369, 0xFF1D, 0x005F, 0xFFF2, 0x0000, 0x000B,
    0x005B, 0x00AF, 0x0385, 0x082B, 0x0C2B, 0x3CCB, 0x7FEB, 0xBCE7,
    0x0A2A, 0xF697, 0x0369, 0xFF1D, 0x005F, 0xFFF2, 0x0000, 0x000D,
    0x005D, 0x00C8, 0x037A, 0x08CA, 0x0B37, 0x3FF2, 0x7FFF, 0xC00E,
    0x0B37, 0xF736, 0x037A, 0xFF38, 0x005D, 0xFFF3, 0x0000, 0x000D,
    0x005D, 0x00C8, 0x037A, 0x08CA, 0x0B37, 0x3FF2, 0x7FFF, 0xC00E,
    0x0B37, 0xF736, 0x037A, 0xFF38, 0x005D, 0xFFF3, 0x0000, 0x0000};

static void MP3AB0(int32_t * v)
{
    // Part 2 - 100% accurate
    static const uint16_t LUT2[8] =
        {
            0xFEC4, 0xF4FA, 0xC5E4, 0xE1C4,
            0x1916, 0x4A50, 0xA268, 0x78AE};
    static const uint16_t LUT3[4] = {0xFB14, 0xD4DC, 0x31F2, 0x8E3A};
    int i;

    for (i = 0; i < 8; i++)
    {
        v[16 + i] = v[0 + i] + v[8 + i];
        v[24 + i] = ((v[0 + i] - v[8 + i]) * LUT2[i]) >> 0x10;
    }

    // Part 3: 4-wide butterflies

    for (i = 0; i < 4; i++)
    {
        v[0 + i] = v[16 + i] + v[20 + i];
        v[4 + i] = ((v[16 + i] - v[20 + i]) * LUT3[i]) >> 0x10;

        v[8 + i] = v[24 + i] + v[28 + i];
        v[12 + i] = ((v[24 + i] - v[28 + i]) * LUT3[i]) >> 0x10;
    }

    // Part 4: 2-wide butterflies - 100% accurate

    for (i = 0; i < 16; i += 4)
    {
        v[16 + i] = v[0 + i] + v[2 + i];
        v[18 + i] = ((v[0 + i] - v[2 + i]) * 0xEC84) >> 0x10;

        v[17 + i] = v[1 + i] + v[3 + i];
        v[19 + i] = ((v[1 + i] - v[3 + i]) * 0x61F8) >> 0x10;
    }
}

void mp3_task(CHle * hle, unsigned int index, uint32_t address)
{
    uint32_t inPtr, outPtr;
    uint32_t t6; // = 0x08A0; - I think these are temporary storage buffers
    uint32_t t5; // = 0x0AC0;
    uint32_t t4; // = (w1 & 0x1E);

    // Initialization code
    uint32_t readPtr;  // S5
    uint32_t writePtr; // S6
    uint32_t tmp;
    int cnt, cnt2;

    // I think these are temporary storage buffers
    t6 = 0x08A0;
    t5 = 0x0AC0;
    t4 = index;

    writePtr = readPtr = address;
    // TODO: Just do that for efficiency...may remove and use directly later anyway
    memcpy(hle->mp3_buffer() + 0xCE8, hle->dram() + readPtr, 8);
    // This must be a header byte or what not
    readPtr += 8;

    for (cnt = 0; cnt < 0x480; cnt += 0x180)
    {
        // DMA: 0xCF0 <- RDRAM[s5] : 0x180
        memcpy(hle->mp3_buffer() + 0xCF0, hle->dram() + readPtr, 0x180);
        inPtr = 0xCF0;  // S7
        outPtr = 0xE70; // S3
        // Inner loop start
        for (cnt2 = 0; cnt2 < 0x180; cnt2 += 0x40)
        {
            t6 &= 0xFFE0;
            t5 &= 0xFFE0;
            t6 |= t4;
            t5 |= t4;
            InnerLoop(hle, outPtr, inPtr, t6, t5, t4);
            t4 = (t4 - 2) & 0x1E;
            tmp = t6;
            t6 = t5;
            t5 = tmp;
            inPtr += 0x40;
            outPtr += 0x40;
        }
        // Inner loop end
        memcpy(hle->dram() + writePtr, hle->mp3_buffer() + 0xe70, 0x180);
        writePtr += 0x180;
        readPtr += 0x180;
    }
}

static void InnerLoop(CHle * hle, uint32_t outPtr, uint32_t inPtr, uint32_t t6, uint32_t t5, uint32_t t4)
{
    // Part 1: 100% accurate

    // 0, 1, 3, 2, 7, 6, 4, 5, 7, 6, 4, 5, 0, 1, 3, 2
    static const uint16_t LUT6[16] =
        {
            0xFFB2, 0xFD3A, 0xF10A, 0xF854,
            0xBDAE, 0xCDA0, 0xE76C, 0xDB94,
            0x1920, 0x4B20, 0xAC7C, 0x7C68,
            0xABEC, 0x9880, 0xDAE8, 0x839C};
    int i;
    uint32_t t0;
    uint32_t t1;
    uint32_t t2;
    uint32_t t3;
    int32_t v2 = 0, v4 = 0, v6 = 0, v8 = 0;
    uint32_t offset;
    uint32_t addptr;
    int x;
    int32_t mult6;
    int32_t mult4;
    int tmp;
    int32_t hi0;
    int32_t hi1;
    int32_t vt;
    int32_t v[32];

    v[0] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x00 ^ S16));
    v[31] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x3E ^ S16));
    v[0] += v[31];
    v[1] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x02 ^ S16));
    v[30] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x3C ^ S16));
    v[1] += v[30];
    v[2] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x06 ^ S16));
    v[28] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x38 ^ S16));
    v[2] += v[28];
    v[3] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x04 ^ S16));
    v[29] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x3A ^ S16));
    v[3] += v[29];

    v[4] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x0E ^ S16));
    v[24] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x30 ^ S16));
    v[4] += v[24];
    v[5] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x0C ^ S16));
    v[25] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x32 ^ S16));
    v[5] += v[25];
    v[6] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x08 ^ S16));
    v[27] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x36 ^ S16));
    v[6] += v[27];
    v[7] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x0A ^ S16));
    v[26] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x34 ^ S16));
    v[7] += v[26];

    v[8] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x1E ^ S16));
    v[16] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x20 ^ S16));
    v[8] += v[16];
    v[9] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x1C ^ S16));
    v[17] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x22 ^ S16));
    v[9] += v[17];
    v[10] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x18 ^ S16));
    v[19] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x26 ^ S16));
    v[10] += v[19];
    v[11] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x1A ^ S16));
    v[18] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x24 ^ S16));
    v[11] += v[18];

    v[12] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x10 ^ S16));
    v[23] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x2E ^ S16));
    v[12] += v[23];
    v[13] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x12 ^ S16));
    v[22] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x2C ^ S16));
    v[13] += v[22];
    v[14] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x16 ^ S16));
    v[20] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x28 ^ S16));
    v[14] += v[20];
    v[15] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x14 ^ S16));
    v[21] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x2A ^ S16));
    v[15] += v[21];

    // Part 2-4

    MP3AB0(v);

    // Part 5 - 1-wide butterflies - 100% accurate but need SSVs!

    t0 = t6 + 0x100;
    t1 = t6 + 0x200;
    t2 = t5 + 0x100;
    t3 = t5 + 0x200;

    // 0x13A8
    v[1] = 0;
    v[11] = ((v[16] - v[17]) * 0xB504) >> 0x10;

    v[16] = -v[16] - v[17];
    v[2] = v[18] + v[19];
    // ** Store v[11] -> (T6 + 0)**
    *(int16_t *)(hle->mp3_buffer() + ((t6 + (short)0x0))) = (short)v[11];

    v[11] = -v[11];
    // ** Store v[16] -> (T3 + 0)**
    *(int16_t *)(hle->mp3_buffer() + ((t3 + (short)0x0))) = (short)v[16];
    // ** Store v[11] -> (T5 + 0)**
    *(int16_t *)(hle->mp3_buffer() + ((t5 + (short)0x0))) = (short)v[11];
    // 0x13E8 - Verified...
    v[2] = -v[2];
    // ** Store v[2] -> (T2 + 0)**
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0x0))) = (short)v[2];
    v[3] = (((v[18] - v[19]) * 0x16A09) >> 0x10) + v[2];
    // ** Store v[3] -> (T0 + 0)**
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0x0))) = (short)v[3];
    // 0x1400 - Verified...
    v[4] = -v[20] - v[21];
    v[6] = v[22] + v[23];
    v[5] = ((v[20] - v[21]) * 0x16A09) >> 0x10;
    // ** Store v[4] -> (T3 + 0xFF80)
    *(int16_t *)(hle->mp3_buffer() + ((t3 + (short)0xFF80))) = (short)v[4];
    v[7] = ((v[22] - v[23]) * 0x2D413) >> 0x10;
    v[5] = v[5] - v[4];
    v[7] = v[7] - v[5];
    v[6] = v[6] + v[6];
    v[5] = v[5] - v[6];
    v[4] = -v[4] - v[6];
    // *** Store v[7] -> (T1 + 0xFF80)
    *(int16_t *)(hle->mp3_buffer() + ((t1 + (short)0xFF80))) = (short)v[7];
    // *** Store v[4] -> (T2 + 0xFF80)
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0xFF80))) = (short)v[4];
    // *** Store v[5] -> (T0 + 0xFF80)
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0xFF80))) = (short)v[5];
    v[8] = v[24] + v[25];

    v[9] = ((v[24] - v[25]) * 0x16A09) >> 0x10;
    v[2] = v[8] + v[9];
    v[11] = ((v[26] - v[27]) * 0x2D413) >> 0x10;
    v[13] = ((v[28] - v[29]) * 0x2D413) >> 0x10;

    v[10] = v[26] + v[27];
    v[10] = v[10] + v[10];
    v[12] = v[28] + v[29];
    v[12] = v[12] + v[12];
    v[14] = v[30] + v[31];
    v[3] = v[8] + v[10];
    v[14] = v[14] + v[14];
    v[13] = (v[13] - v[2]) + v[12];
    v[15] = (((v[30] - v[31]) * 0x5A827) >> 0x10) - (v[11] + v[2]);
    v[14] = -(v[14] + v[14]) + v[3];
    v[17] = v[13] - v[10];
    v[9] = v[9] + v[14];
    // ** Store v[9] -> (T6 + 0x40)
    *(int16_t *)(hle->mp3_buffer() + ((t6 + (short)0x40))) = (short)v[9];
    v[11] = v[11] - v[13];
    // ** Store v[17] -> (T0 + 0xFFC0)
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0xFFC0))) = (short)v[17];
    v[12] = v[8] - v[12];
    // ** Store v[11] -> (T0 + 0x40)
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0x40))) = (short)v[11];
    v[8] = -v[8];
    // ** Store v[15] -> (T1 + 0xFFC0)
    *(int16_t *)(hle->mp3_buffer() + ((t1 + (short)0xFFC0))) = (short)v[15];
    v[10] = -v[10] - v[12];
    // ** Store v[12] -> (T2 + 0x40)
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0x40))) = (short)v[12];
    // ** Store v[8] -> (T3 + 0xFFC0)
    *(int16_t *)(hle->mp3_buffer() + ((t3 + (short)0xFFC0))) = (short)v[8];
    // ** Store v[14] -> (T5 + 0x40)
    *(int16_t *)(hle->mp3_buffer() + ((t5 + (short)0x40))) = (short)v[14];
    // ** Store v[10] -> (T2 + 0xFFC0)
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0xFFC0))) = (short)v[10];
    // 0x14FC - Verified...

    // Part 6 - 100% accurate

    v[0] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x00 ^ S16));
    v[31] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x3E ^ S16));
    v[0] -= v[31];
    v[1] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x02 ^ S16));
    v[30] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x3C ^ S16));
    v[1] -= v[30];
    v[2] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x06 ^ S16));
    v[28] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x38 ^ S16));
    v[2] -= v[28];
    v[3] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x04 ^ S16));
    v[29] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x3A ^ S16));
    v[3] -= v[29];

    v[4] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x0E ^ S16));
    v[24] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x30 ^ S16));
    v[4] -= v[24];
    v[5] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x0C ^ S16));
    v[25] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x32 ^ S16));
    v[5] -= v[25];
    v[6] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x08 ^ S16));
    v[27] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x36 ^ S16));
    v[6] -= v[27];
    v[7] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x0A ^ S16));
    v[26] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x34 ^ S16));
    v[7] -= v[26];

    v[8] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x1E ^ S16));
    v[16] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x20 ^ S16));
    v[8] -= v[16];
    v[9] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x1C ^ S16));
    v[17] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x22 ^ S16));
    v[9] -= v[17];
    v[10] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x18 ^ S16));
    v[19] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x26 ^ S16));
    v[10] -= v[19];
    v[11] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x1A ^ S16));
    v[18] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x24 ^ S16));
    v[11] -= v[18];

    v[12] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x10 ^ S16));
    v[23] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x2E ^ S16));
    v[12] -= v[23];
    v[13] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x12 ^ S16));
    v[22] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x2C ^ S16));
    v[13] -= v[22];
    v[14] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x16 ^ S16));
    v[20] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x28 ^ S16));
    v[14] -= v[20];
    v[15] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x14 ^ S16));
    v[21] = *(int16_t *)(hle->mp3_buffer() + inPtr + (0x2A ^ S16));
    v[15] -= v[21];

    for (i = 0; i < 16; i++)
    {
        v[0 + i] = (v[0 + i] * LUT6[i]) >> 0x10;
    }
    v[0] = v[0] + v[0];
    v[1] = v[1] + v[1];
    v[2] = v[2] + v[2];
    v[3] = v[3] + v[3];
    v[4] = v[4] + v[4];
    v[5] = v[5] + v[5];
    v[6] = v[6] + v[6];
    v[7] = v[7] + v[7];
    v[12] = v[12] + v[12];
    v[13] = v[13] + v[13];
    v[15] = v[15] + v[15];

    MP3AB0(v);

    // Part 7: - 100% accurate + SSV - unoptimized (TODO: optimize?)

    v[0] = (v[17] + v[16]) >> 1;
    v[1] = ((v[17] * (int)((short)0xA57E * 2)) + (v[16] * 0xB504)) >> 0x10;
    v[2] = -v[18] - v[19];
    v[3] = ((v[18] - v[19]) * 0x16A09) >> 0x10;
    v[4] = v[20] + v[21] + v[0];
    v[5] = (((v[20] - v[21]) * 0x16A09) >> 0x10) + v[1];
    v[6] = (((v[22] + v[23]) << 1) + v[0]) - v[2];
    v[7] = (((v[22] - v[23]) * 0x2D413) >> 0x10) + v[0] + v[1] + v[3];
    // 0x16A8
    // Save v[0] -> (T3 + 0xFFE0)
    *(int16_t *)(hle->mp3_buffer() + ((t3 + (short)0xFFE0))) = (short)-v[0];
    v[8] = v[24] + v[25];
    v[9] = ((v[24] - v[25]) * 0x16A09) >> 0x10;
    v[10] = ((v[26] + v[27]) << 1) + v[8];
    v[11] = (((v[26] - v[27]) * 0x2D413) >> 0x10) + v[8] + v[9];
    v[12] = v[4] - ((v[28] + v[29]) << 1);
    // ** Store v12 -> (T2 + 0x20)
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0x20))) = (short)v[12];
    v[13] = (((v[28] - v[29]) * 0x2D413) >> 0x10) - v[12] - v[5];
    v[14] = v[30] + v[31];
    v[14] = v[14] + v[14];
    v[14] = v[14] + v[14];
    v[14] = v[6] - v[14];
    v[15] = (((v[30] - v[31]) * 0x5A827) >> 0x10) - v[7];
    // Store v14 -> (T5 + 0x20)
    *(int16_t *)(hle->mp3_buffer() + ((t5 + (short)0x20))) = (short)v[14];
    v[14] = v[14] + v[1];
    // Store v[14] -> (T6 + 0x20)
    *(int16_t *)(hle->mp3_buffer() + ((t6 + (short)0x20))) = (short)v[14];
    // Store v[15] -> (T1 + 0xFFE0)
    *(int16_t *)(hle->mp3_buffer() + ((t1 + (short)0xFFE0))) = (short)v[15];
    v[9] = v[9] + v[10];
    v[1] = v[1] + v[6];
    v[6] = v[10] - v[6];
    v[1] = v[9] - v[1];
    // Store v[6] -> (T5 + 0x60)
    *(int16_t *)(hle->mp3_buffer() + ((t5 + (short)0x60))) = (short)v[6];
    v[10] = v[10] + v[2];
    v[10] = v[4] - v[10];
    // Store v[10] -> (T2 + 0xFFA0)
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0xFFA0))) = (short)v[10];
    v[12] = v[2] - v[12];
    // Store v[12] -> (T2 + 0xFFE0)
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0xFFE0))) = (short)v[12];
    v[5] = v[4] + v[5];
    v[4] = v[8] - v[4];
    // Store v[4] -> (T2 + 0x60)
    *(int16_t *)(hle->mp3_buffer() + ((t2 + (short)0x60))) = (short)v[4];
    v[0] = v[0] - v[8];
    // Store v[0] -> (T3 + 0xFFA0)
    *(int16_t *)(hle->mp3_buffer() + ((t3 + (short)0xFFA0))) = (short)v[0];
    v[7] = v[7] - v[11];
    // Store v[7] -> (T1 + 0xFFA0)
    *(int16_t *)(hle->mp3_buffer() + ((t1 + (short)0xFFA0))) = (short)v[7];
    v[11] = v[11] - v[3];
    // Store v[1] -> (T6 + 0x60)
    *(int16_t *)(hle->mp3_buffer() + ((t6 + (short)0x60))) = (short)v[1];
    v[11] = v[11] - v[5];
    // Store v[11] -> (T0 + 0x60)
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0x60))) = (short)v[11];
    v[3] = v[3] - v[13];
    // Store v[3] -> (T0 + 0x20)
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0x20))) = (short)v[3];
    v[13] = v[13] + v[2];
    // Store v[13] -> (T0 + 0xFFE0)
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0xFFE0))) = (short)v[13];
    v[2] = (v[5] - v[2]) - v[9];
    // Store v[2] -> (T0 + 0xFFA0)
    *(int16_t *)(hle->mp3_buffer() + ((t0 + (short)0xFFA0))) = (short)v[2];
    // 0x7A8 - Verified...

    // Step 8 - Dewindowing

    addptr = t6 & 0xFFE0;

    offset = 0x10 - (t4 >> 1);
    for (x = 0; x < 8; x++)
    {
        int32_t v0;
        int32_t v18;
        v2 = v4 = v6 = v8 = 0;

        for (i = 7; i >= 0; i--)
        {
            v2 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x00) * (short)DeWindowLUT[offset + 0x00] + 0x4000) >> 0xF;
            v4 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x10) * (short)DeWindowLUT[offset + 0x08] + 0x4000) >> 0xF;
            v6 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x20) * (short)DeWindowLUT[offset + 0x20] + 0x4000) >> 0xF;
            v8 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x30) * (short)DeWindowLUT[offset + 0x28] + 0x4000) >> 0xF;
            addptr += 2;
            offset++;
        }
        v0 = v2 + v4;
        v18 = v6 + v8;
        // Clamp(v0);
        // Clamp(v18);
        // Clamp?
        *(int16_t *)(hle->mp3_buffer() + (outPtr ^ S16)) = v0;
        *(int16_t *)(hle->mp3_buffer() + ((outPtr + 2) ^ S16)) = v18;
        outPtr += 4;
        addptr += 0x30;
        offset += 0x38;
    }

    offset = 0x10 - (t4 >> 1) + 8 * 0x40;
    v2 = v4 = 0;
    for (i = 0; i < 4; i++)
    {
        v2 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x00) * (short)DeWindowLUT[offset + 0x00] + 0x4000) >> 0xF;
        v2 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x10) * (short)DeWindowLUT[offset + 0x08] + 0x4000) >> 0xF;
        addptr += 2;
        offset++;
        v4 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x00) * (short)DeWindowLUT[offset + 0x00] + 0x4000) >> 0xF;
        v4 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x10) * (short)DeWindowLUT[offset + 0x08] + 0x4000) >> 0xF;
        addptr += 2;
        offset++;
    }
    mult6 = *(int32_t *)(hle->mp3_buffer() + 0xCE8);
    mult4 = *(int32_t *)(hle->mp3_buffer() + 0xCEC);
    if (t4 & 0x2)
    {
        v2 = (v2 * *(uint32_t *)(hle->mp3_buffer() + 0xCE8)) >> 0x10;
        *(int16_t *)(hle->mp3_buffer() + (outPtr ^ S16)) = v2;
    }
    else
    {
        v4 = (v4 * *(uint32_t *)(hle->mp3_buffer() + 0xCE8)) >> 0x10;
        *(int16_t *)(hle->mp3_buffer() + (outPtr ^ S16)) = v4;
        mult4 = *(uint32_t *)(hle->mp3_buffer() + 0xCE8);
    }
    addptr -= 0x50;

    for (x = 0; x < 8; x++)
    {
        int32_t v0;
        int32_t v18;
        v2 = v4 = v6 = v8 = 0;

        offset = (0x22F - (t4 >> 1) + x * 0x40);

        for (i = 0; i < 4; i++)
        {
            v2 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x20) * (short)DeWindowLUT[offset + 0x00] + 0x4000) >> 0xF;
            v2 -= ((int)*(int16_t *)(hle->mp3_buffer() + ((addptr + 2)) + 0x20) * (short)DeWindowLUT[offset + 0x01] + 0x4000) >> 0xF;
            v4 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x30) * (short)DeWindowLUT[offset + 0x08] + 0x4000) >> 0xF;
            v4 -= ((int)*(int16_t *)(hle->mp3_buffer() + ((addptr + 2)) + 0x30) * (short)DeWindowLUT[offset + 0x09] + 0x4000) >> 0xF;
            v6 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x00) * (short)DeWindowLUT[offset + 0x20] + 0x4000) >> 0xF;
            v6 -= ((int)*(int16_t *)(hle->mp3_buffer() + ((addptr + 2)) + 0x00) * (short)DeWindowLUT[offset + 0x21] + 0x4000) >> 0xF;
            v8 += ((int)*(int16_t *)(hle->mp3_buffer() + (addptr) + 0x10) * (short)DeWindowLUT[offset + 0x28] + 0x4000) >> 0xF;
            v8 -= ((int)*(int16_t *)(hle->mp3_buffer() + ((addptr + 2)) + 0x10) * (short)DeWindowLUT[offset + 0x29] + 0x4000) >> 0xF;
            addptr += 4;
            offset += 2;
        }
        v0 = v2 + v4;
        v18 = v6 + v8;
        // Clamp(v0);
        // Clamp(v18);
        // Clamp?
        *(int16_t *)(hle->mp3_buffer() + ((outPtr + 2) ^ S16)) = v0;
        *(int16_t *)(hle->mp3_buffer() + ((outPtr + 4) ^ S16)) = v18;
        outPtr += 4;
        addptr -= 0x50;
    }

    tmp = outPtr;
    hi0 = mult6;
    hi1 = mult4;

    hi0 = (int)hi0 >> 0x10;
    hi1 = (int)hi1 >> 0x10;
    for (i = 0; i < 8; i++)
    {
        // v0
        vt = (*(int16_t *)(hle->mp3_buffer() + ((tmp - 0x40) ^ S16)) * hi0);
        *(int16_t *)((uint8_t *)hle->mp3_buffer() + ((tmp - 0x40) ^ S16)) = clamp_s16(vt);

        // v17
        vt = (*(int16_t *)(hle->mp3_buffer() + ((tmp - 0x30) ^ S16)) * hi0);
        *(int16_t *)((uint8_t *)hle->mp3_buffer() + ((tmp - 0x30) ^ S16)) = clamp_s16(vt);

        // v2
        vt = (*(int16_t *)(hle->mp3_buffer() + ((tmp - 0x1E) ^ S16)) * hi1);
        *(int16_t *)((uint8_t *)hle->mp3_buffer() + ((tmp - 0x1E) ^ S16)) = clamp_s16(vt);

        // v4
        vt = (*(int16_t *)(hle->mp3_buffer() + ((tmp - 0xE) ^ S16)) * hi1);
        *(int16_t *)((uint8_t *)hle->mp3_buffer() + ((tmp - 0xE) ^ S16)) = clamp_s16(vt);

        tmp += 2;
    }
}