Port m4a from pokeemerald

1 files changed, 1652 insertions, 0 deletions

diff --git a/src/m4a.c b/src/m4a.c
new file mode 100644
index 0000000..42e6d9d
--- /dev/null
+++ b/src/m4a.c
@@ -0,0 +1,1652 @@
+#include "gba/m4a_internal.h"
+#include "global.h"
+
+extern const u8 gCgb3Vol[];
+
+extern char SoundMainRAM_Buffer[0x400];
+
+extern struct SoundInfo gSoundInfo;
+
+
+u32 MidiKeyToFreq(struct WaveData *wav, u8 key, u8 fineAdjust)
+{
+    u32 val1;
+    u32 val2;
+    u32 fineAdjustShifted = fineAdjust << 24;
+
+    if (key > 178)
+    {
+        key = 178;
+        fineAdjustShifted = 255 << 24;
+    }
+
+    val1 = gScaleTable[key];
+    val1 = gFreqTable[val1 & 0xF] >> (val1 >> 4);
+
+    val2 = gScaleTable[key + 1];
+    val2 = gFreqTable[val2 & 0xF] >> (val2 >> 4);
+
+    return umul3232H32(wav->freq, val1 + umul3232H32(val2 - val1, fineAdjustShifted));
+}
+
+void UnusedDummyFunc()
+{
+}
+
+void MPlayContinue(struct MusicPlayerInfo *mplayInfo)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->status &= ~MUSICPLAYER_STATUS_PAUSE;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void MPlayFadeOut(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->fadeOC = speed;
+        mplayInfo->fadeOI = speed;
+        mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT);
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aSoundInit(void)
+{
+    s32 i;
+
+    CpuCopy32((void *)((s32)SoundMainRAM & ~1), SoundMainRAM_Buffer, sizeof(SoundMainRAM_Buffer));
+
+    SoundInit(&gSoundInfo);
+    MPlayExtender(gCgbChans);
+    m4aSoundMode(SOUND_MODE_DA_BIT_8
+               | SOUND_MODE_FREQ_18157
+               | (14 << SOUND_MODE_MASVOL_SHIFT)
+               | (5 << SOUND_MODE_MAXCHN_SHIFT));
+
+    for (i = 0; i < NUM_MUSIC_PLAYERS; i++)
+    {
+        struct MusicPlayerInfo *mplayInfo = gMPlayTable[i].info;
+        MPlayOpen(mplayInfo, gMPlayTable[i].track, gMPlayTable[i].unk_8);
+        mplayInfo->unk_B = gMPlayTable[i].unk_A;
+        mplayInfo->memAccArea = gMPlayMemAccArea;
+    }
+}
+
+void m4aSoundMain(void)
+{
+    SoundMain();
+}
+
+void m4aSongNumStart(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    MPlayStart(mplay->info, song->header);
+}
+
+void m4aSongNumStartOrChange(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader != song->header)
+    {
+        MPlayStart(mplay->info, song->header);
+    }
+    else
+    {
+        if ((mplay->info->status & MUSICPLAYER_STATUS_TRACK) == 0
+         || (mplay->info->status & MUSICPLAYER_STATUS_PAUSE))
+        {
+            MPlayStart(mplay->info, song->header);
+        }
+    }
+}
+
+void m4aSongNumStartOrContinue(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader != song->header)
+        MPlayStart(mplay->info, song->header);
+    else if ((mplay->info->status & MUSICPLAYER_STATUS_TRACK) == 0)
+        MPlayStart(mplay->info, song->header);
+    else if (mplay->info->status & MUSICPLAYER_STATUS_PAUSE)
+        MPlayContinue(mplay->info);
+}
+
+
+void m4aSongNumStop(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader == song->header)
+        m4aMPlayStop(mplay->info);
+}
+
+void m4aSongNumContinue(u16 n)
+{
+    const struct MusicPlayer *mplayTable = gMPlayTable;
+    const struct Song *songTable = gSongTable;
+    const struct Song *song = &songTable[n];
+    const struct MusicPlayer *mplay = &mplayTable[song->ms];
+
+    if (mplay->info->songHeader == song->header)
+        MPlayContinue(mplay->info);
+}
+
+void m4aMPlayAllStop(void)
+{
+    s32 i;
+
+    for (i = 0; i < NUM_MUSIC_PLAYERS; i++)
+        m4aMPlayStop(gMPlayTable[i].info);
+}
+
+void m4aMPlayContinue(struct MusicPlayerInfo *mplayInfo)
+{
+    MPlayContinue(mplayInfo);
+}
+
+void m4aMPlayAllContinue(void)
+{
+    s32 i;
+
+    for (i = 0; i < NUM_MUSIC_PLAYERS; i++)
+        MPlayContinue(gMPlayTable[i].info);
+}
+
+void m4aMPlayFadeOut(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    MPlayFadeOut(mplayInfo, speed);
+}
+
+void m4aMPlayFadeOutTemporarily(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->fadeOC = speed;
+        mplayInfo->fadeOI = speed;
+        mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT) | TEMPORARY_FADE;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+void m4aMPlayFadeIn(struct MusicPlayerInfo *mplayInfo, u16 speed)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->fadeOC = speed;
+        mplayInfo->fadeOI = speed;
+        mplayInfo->fadeOV = (0 << FADE_VOL_SHIFT) | FADE_IN;
+        mplayInfo->status &= ~MUSICPLAYER_STATUS_PAUSE;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aMPlayImmInit(struct MusicPlayerInfo *mplayInfo)
+{
+    s32 trackCount = mplayInfo->trackCount;
+    struct MusicPlayerTrack *track = mplayInfo->tracks;
+
+    while (trackCount > 0)
+    {
+        if (track->flags & MPT_FLG_EXIST)
+        {
+            if (track->flags & MPT_FLG_START)
+            {
+                Clear64byte(track);
+                track->flags = MPT_FLG_EXIST;
+                track->bendRange = 2;
+                track->volX = 64;
+                track->lfoSpeed = 22;
+                track->tone.type = 1;
+            }
+        }
+
+        trackCount--;
+        track++;
+    }
+}
+
+void MPlayExtender(struct CgbChannel *cgbChans)
+{
+    struct SoundInfo *soundInfo;
+    u32 ident;
+
+    REG_SOUNDCNT_X = SOUND_MASTER_ENABLE
+                   | SOUND_4_ON
+                   | SOUND_3_ON
+                   | SOUND_2_ON
+                   | SOUND_1_ON;
+    REG_SOUNDCNT_L = 0; // set master volume to zero
+    REG_NR12 = 0x8;
+    REG_NR22 = 0x8;
+    REG_NR42 = 0x8;
+    REG_NR14 = 0x80;
+    REG_NR24 = 0x80;
+    REG_NR44 = 0x80;
+    REG_NR30 = 0;
+    REG_NR50 = 0x77;
+
+    soundInfo = SOUND_INFO_PTR;
+
+    ident = soundInfo->ident;
+
+    if (ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    gMPlayJumpTable[8] = ply_memacc;
+    gMPlayJumpTable[17] = ply_lfos;
+    gMPlayJumpTable[19] = ply_mod;
+    gMPlayJumpTable[28] = ply_xcmd;
+    gMPlayJumpTable[29] = ply_endtie;
+    gMPlayJumpTable[30] = SampleFreqSet;
+    gMPlayJumpTable[31] = TrackStop;
+    gMPlayJumpTable[32] = FadeOutBody;
+    gMPlayJumpTable[33] = TrkVolPitSet;
+
+    soundInfo->cgbChans = (struct CgbChannel *)cgbChans;
+    soundInfo->CgbSound = CgbSound;
+    soundInfo->CgbOscOff = CgbOscOff;
+    soundInfo->MidiKeyToCgbFreq = MidiKeyToCgbFreq;
+    soundInfo->maxLines = MAX_LINES;
+
+    CpuFill32(0, cgbChans, sizeof(struct CgbChannel) * 4);
+
+    cgbChans[0].ty = 1;
+    cgbChans[0].panMask = 0x11;
+    cgbChans[1].ty = 2;
+    cgbChans[1].panMask = 0x22;
+    cgbChans[2].ty = 3;
+    cgbChans[2].panMask = 0x44;
+    cgbChans[3].ty = 4;
+    cgbChans[3].panMask = 0x88;
+
+    soundInfo->ident = ident;
+}
+
+void MusicPlayerJumpTableCopy(void)
+{
+    asm("swi 0x2A");
+}
+
+void ClearChain(void *x)
+{
+    void (*func)(void *) = *(&gMPlayJumpTable[34]);
+    func(x);
+}
+
+void Clear64byte(void *x)
+{
+    void (*func)(void *) = *(&gMPlayJumpTable[35]);
+    func(x);
+}
+
+void SoundInit(struct SoundInfo *soundInfo)
+{
+    soundInfo->ident = 0;
+
+    if (REG_DMA1CNT & (DMA_REPEAT << 16))
+        REG_DMA1CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+    if (REG_DMA2CNT & (DMA_REPEAT << 16))
+        REG_DMA2CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+    REG_DMA1CNT_H = DMA_32BIT;
+    REG_DMA2CNT_H = DMA_32BIT;
+    REG_SOUNDCNT_X = SOUND_MASTER_ENABLE
+                   | SOUND_4_ON
+                   | SOUND_3_ON
+                   | SOUND_2_ON
+                   | SOUND_1_ON;
+    REG_SOUNDCNT_H = SOUND_B_FIFO_RESET | SOUND_B_TIMER_0 | SOUND_B_LEFT_OUTPUT
+                   | SOUND_A_FIFO_RESET | SOUND_A_TIMER_0 | SOUND_A_RIGHT_OUTPUT
+                   | SOUND_ALL_MIX_FULL;
+    REG_SOUNDBIAS_H = (REG_SOUNDBIAS_H & 0x3F) | 0x40;
+
+    REG_DMA1SAD = (s32)soundInfo->pcmBuffer;
+    REG_DMA1DAD = (s32)&REG_FIFO_A;
+    REG_DMA2SAD = (s32)soundInfo->pcmBuffer + PCM_DMA_BUF_SIZE;
+    REG_DMA2DAD = (s32)&REG_FIFO_B;
+
+    SOUND_INFO_PTR = soundInfo;
+    CpuFill32(0, soundInfo, sizeof(struct SoundInfo));
+
+    soundInfo->maxChans = 8;
+    soundInfo->masterVolume = 15;
+    soundInfo->plynote = (u32)ply_note;
+    soundInfo->CgbSound = DummyFunc;
+    soundInfo->CgbOscOff = (void (*)(u8))DummyFunc;
+    soundInfo->MidiKeyToCgbFreq = (u32 (*)(u8, u8, u8))DummyFunc;
+    soundInfo->ExtVolPit = (u32)DummyFunc;
+
+    MPlayJumpTableCopy(gMPlayJumpTable);
+
+    soundInfo->MPlayJumpTable = (u32)gMPlayJumpTable;
+
+    SampleFreqSet(SOUND_MODE_FREQ_13379);
+
+    soundInfo->ident = ID_NUMBER;
+}
+
+void SampleFreqSet(u32 freq)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+
+    freq = (freq & 0xF0000) >> 16;
+    soundInfo->freq = freq;
+    soundInfo->pcmSamplesPerVBlank = gPcmSamplesPerVBlankTable[freq - 1];
+    soundInfo->pcmDmaPeriod = PCM_DMA_BUF_SIZE / soundInfo->pcmSamplesPerVBlank;
+
+    // LCD refresh rate 59.7275Hz
+    soundInfo->pcmFreq = (597275 * soundInfo->pcmSamplesPerVBlank + 5000) / 10000;
+
+    // CPU frequency 16.78Mhz
+    soundInfo->divFreq = (16777216 / soundInfo->pcmFreq + 1) >> 1;
+
+    // Turn off timer 0.
+    REG_TM0CNT_H = 0;
+
+    // cycles per LCD fresh 280896
+    REG_TM0CNT_L = -(280896 / soundInfo->pcmSamplesPerVBlank);
+
+    m4aSoundVSyncOn();
+
+    while (*(vu8 *)REG_ADDR_VCOUNT == 159)
+        ;
+
+    while (*(vu8 *)REG_ADDR_VCOUNT != 159)
+        ;
+
+    REG_TM0CNT_H = TIMER_ENABLE | TIMER_1CLK;
+}
+
+void m4aSoundMode(u32 mode)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    u32 temp;
+
+    if (soundInfo->ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    temp = mode & (SOUND_MODE_REVERB_SET | SOUND_MODE_REVERB_VAL);
+
+    if (temp)
+        soundInfo->reverb = temp & SOUND_MODE_REVERB_VAL;
+
+    temp = mode & SOUND_MODE_MAXCHN;
+
+    if (temp)
+    {
+        struct SoundChannel *chan;
+
+        soundInfo->maxChans = temp >> SOUND_MODE_MAXCHN_SHIFT;
+
+        temp = MAX_DIRECTSOUND_CHANNELS;
+        chan = &soundInfo->chans[0];
+
+        while (temp != 0)
+        {
+            chan->status = 0;
+            temp--;
+            chan++;
+        }
+    }
+
+    temp = mode & SOUND_MODE_MASVOL;
+
+    if (temp)
+        soundInfo->masterVolume = temp >> SOUND_MODE_MASVOL_SHIFT;
+
+    temp = mode & SOUND_MODE_DA_BIT;
+
+    if (temp)
+    {
+        temp = (temp & 0x300000) >> 14;
+        REG_SOUNDBIAS_H = (REG_SOUNDBIAS_H & 0x3F) | temp;
+    }
+
+    temp = mode & SOUND_MODE_FREQ;
+
+    if (temp)
+    {
+        m4aSoundVSyncOff();
+        SampleFreqSet(temp);
+    }
+
+    soundInfo->ident = ID_NUMBER;
+}
+
+void SoundClear(void)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    s32 i;
+    void *chan;
+
+    if (soundInfo->ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    i = MAX_DIRECTSOUND_CHANNELS;
+    chan = &soundInfo->chans[0];
+
+    while (i > 0)
+    {
+        ((struct SoundChannel *)chan)->status = 0;
+        i--;
+        chan = (void *)((s32)chan + sizeof(struct SoundChannel));
+    }
+
+    chan = soundInfo->cgbChans;
+
+    if (chan)
+    {
+        i = 1;
+
+        while (i <= 4)
+        {
+            soundInfo->CgbOscOff(i);
+            ((struct CgbChannel *)chan)->sf = 0;
+            i++;
+            chan = (void *)((s32)chan + sizeof(struct CgbChannel));
+        }
+    }
+
+    soundInfo->ident = ID_NUMBER;
+}
+
+void m4aSoundVSyncOff(void)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+
+    if (soundInfo->ident >= ID_NUMBER && soundInfo->ident <= ID_NUMBER + 1)
+    {
+        soundInfo->ident += 10;
+
+        if (REG_DMA1CNT & (DMA_REPEAT << 16))
+            REG_DMA1CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+        if (REG_DMA2CNT & (DMA_REPEAT << 16))
+            REG_DMA2CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4;
+
+        REG_DMA1CNT_H = DMA_32BIT;
+        REG_DMA2CNT_H = DMA_32BIT;
+
+        CpuFill32(0, soundInfo->pcmBuffer, sizeof(soundInfo->pcmBuffer));
+    }
+}
+
+void m4aSoundVSyncOn(void)
+{
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    u32 ident = soundInfo->ident;
+
+    if (ident == ID_NUMBER)
+        return;
+
+    REG_DMA1CNT_H = DMA_ENABLE | DMA_START_SPECIAL | DMA_32BIT | DMA_REPEAT;
+    REG_DMA2CNT_H = DMA_ENABLE | DMA_START_SPECIAL | DMA_32BIT | DMA_REPEAT;
+
+    soundInfo->pcmDmaCounter = 0;
+    soundInfo->ident = ident - 10;
+}
+
+void MPlayOpen(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *tracks, u8 trackCount)
+{
+    struct SoundInfo *soundInfo;
+
+    if (trackCount == 0)
+        return;
+
+    if (trackCount > MAX_MUSICPLAYER_TRACKS)
+        trackCount = MAX_MUSICPLAYER_TRACKS;
+
+    soundInfo = SOUND_INFO_PTR;
+
+    if (soundInfo->ident != ID_NUMBER)
+        return;
+
+    soundInfo->ident++;
+
+    Clear64byte(mplayInfo);
+
+    mplayInfo->tracks = tracks;
+    mplayInfo->trackCount = trackCount;
+    mplayInfo->status = MUSICPLAYER_STATUS_PAUSE;
+
+    while (trackCount != 0)
+    {
+        tracks->flags = 0;
+        trackCount--;
+        tracks++;
+    }
+
+    if (soundInfo->func != 0)
+    {
+        mplayInfo->func = soundInfo->func;
+        mplayInfo->intp = soundInfo->intp;
+        soundInfo->func = 0;
+    }
+
+    soundInfo->intp = (u32)mplayInfo;
+    soundInfo->func = (u32)MPlayMain;
+    soundInfo->ident = ID_NUMBER;
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void MPlayStart(struct MusicPlayerInfo *mplayInfo, struct SongHeader *songHeader)
+{
+    s32 i;
+    u8 unk_B;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    unk_B = mplayInfo->unk_B;
+
+    if (!unk_B
+        || ((!mplayInfo->songHeader || !(mplayInfo->tracks[0].flags & MPT_FLG_START))
+            && ((mplayInfo->status & MUSICPLAYER_STATUS_TRACK) == 0
+                || (mplayInfo->status & MUSICPLAYER_STATUS_PAUSE)))
+        || (mplayInfo->priority <= songHeader->priority))
+    {
+        mplayInfo->ident++;
+        mplayInfo->status = 0;
+        mplayInfo->songHeader = songHeader;
+        mplayInfo->tone = songHeader->tone;
+        mplayInfo->priority = songHeader->priority;
+        mplayInfo->clock = 0;
+        mplayInfo->tempoD = 150;
+        mplayInfo->tempoI = 150;
+        mplayInfo->tempoU = 0x100;
+        mplayInfo->tempoC = 0;
+        mplayInfo->fadeOI = 0;
+
+        i = 0;
+        track = mplayInfo->tracks;
+
+        while (i < songHeader->trackCount && i < mplayInfo->trackCount)
+        {
+            TrackStop(mplayInfo, track);
+            track->flags = MPT_FLG_EXIST | MPT_FLG_START;
+            track->chan = 0;
+            track->cmdPtr = songHeader->part[i];
+            i++;
+            track++;
+        }
+
+        while (i < mplayInfo->trackCount)
+        {
+            TrackStop(mplayInfo, track);
+            track->flags = 0;
+            i++;
+            track++;
+        }
+
+        if (songHeader->reverb & 0x80)
+            m4aSoundMode(songHeader->reverb);
+
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aMPlayStop(struct MusicPlayerInfo *mplayInfo)
+{
+    s32 i;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+    mplayInfo->status |= MUSICPLAYER_STATUS_PAUSE;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+
+    while (i > 0)
+    {
+        TrackStop(mplayInfo, track);
+        i--;
+        track++;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void FadeOutBody(struct MusicPlayerInfo *mplayInfo)
+{
+    s32 i;
+    struct MusicPlayerTrack *track;
+    u16 fadeOI = mplayInfo->fadeOI;
+    register u32 temp asm("r3");
+    register u16 mask asm("r2");
+
+    if (fadeOI == 0)
+        return;
+
+    mplayInfo->fadeOC--;
+
+    temp = 0xFFFF;
+    mask = temp;
+
+    if (mplayInfo->fadeOC != 0)
+        return;
+
+    mplayInfo->fadeOC = fadeOI;
+
+    if (mplayInfo->fadeOV & FADE_IN)
+    {
+        mplayInfo->fadeOV += (4 << FADE_VOL_SHIFT);
+
+        if ((u16)(mplayInfo->fadeOV & mask) >= (64 << FADE_VOL_SHIFT))
+        {
+            mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT);
+            mplayInfo->fadeOI = 0;
+        }
+    }
+    else
+    {
+        mplayInfo->fadeOV -= (4 << FADE_VOL_SHIFT);
+
+        if ((s16)(mplayInfo->fadeOV & mask) <= 0)
+        {
+            i = mplayInfo->trackCount;
+            track = mplayInfo->tracks;
+
+            while (i > 0)
+            {
+                register u32 fadeOV asm("r7");
+                u32 val;
+
+                TrackStop(mplayInfo, track);
+
+                val = TEMPORARY_FADE;
+                fadeOV = mplayInfo->fadeOV;
+                val &= fadeOV;
+
+                if (!val)
+                    track->flags = 0;
+
+                i--;
+                track++;
+            }
+
+            if (mplayInfo->fadeOV & TEMPORARY_FADE)
+                mplayInfo->status |= MUSICPLAYER_STATUS_PAUSE;
+            else
+                mplayInfo->status = MUSICPLAYER_STATUS_PAUSE;
+
+            mplayInfo->fadeOI = 0;
+            return;
+        }
+    }
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+
+    while (i > 0)
+    {
+        if (track->flags & MPT_FLG_EXIST)
+        {
+            track->volX = (mplayInfo->fadeOV >> FADE_VOL_SHIFT);
+            track->flags |= MPT_FLG_VOLCHG;
+        }
+
+        i--;
+        track++;
+    }
+}
+
+void TrkVolPitSet(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    if (track->flags & MPT_FLG_VOLSET)
+    {
+        s32 x;
+        s32 y;
+
+        x = (u32)(track->vol * track->volX) >> 5;
+
+        if (track->modT == 1)
+            x = (u32)(x * (track->modM + 128)) >> 7;
+
+        y = 2 * track->pan + track->panX;
+
+        if (track->modT == 2)
+            y += track->modM;
+
+        if (y < -128)
+            y = -128;
+        else if (y > 127)
+            y = 127;
+
+        track->volMR = (u32)((y + 128) * x) >> 8;
+        track->volML = (u32)((127 - y) * x) >> 8;
+    }
+
+    if (track->flags & MPT_FLG_PITSET)
+    {
+        s32 bend = track->bend * track->bendRange;
+        register s32 x asm("r1") = track->tune;
+        x += bend;
+        x *= 4;
+        x += (track->keyShift << 8);
+        x += (track->keyShiftX << 8);
+        x += track->pitX;
+
+        if (track->modT == 0)
+            x += 16 * track->modM;
+
+        track->keyM = x >> 8;
+        track->pitM = x;
+    }
+
+    track->flags &= ~(MPT_FLG_PITSET | MPT_FLG_VOLSET);
+}
+
+u32 MidiKeyToCgbFreq(u8 chanNum, u8 key, u8 fineAdjust)
+{
+    if (chanNum == 4)
+    {
+        if (key <= 20)
+        {
+            key = 0;
+        }
+        else
+        {
+            key -= 21;
+            if (key > 59)
+                key = 59;
+        }
+
+        return gNoiseTable[key];
+    }
+    else
+    {
+        s32 val1;
+        s32 val2;
+
+        if (key <= 35)
+        {
+            fineAdjust = 0;
+            key = 0;
+        }
+        else
+        {
+            key -= 36;
+            if (key > 130)
+            {
+                key = 130;
+                fineAdjust = 255;
+            }
+        }
+
+        val1 = gCgbScaleTable[key];
+        val1 = gCgbFreqTable[val1 & 0xF] >> (val1 >> 4);
+
+        val2 = gCgbScaleTable[key + 1];
+        val2 = gCgbFreqTable[val2 & 0xF] >> (val2 >> 4);
+
+        return val1 + ((fineAdjust * (val2 - val1)) >> 8) + 2048;
+    }
+}
+
+void CgbOscOff(u8 chanNum)
+{
+    switch (chanNum)
+    {
+    case 1:
+        REG_NR12 = 8;
+        REG_NR14 = 0x80;
+        break;
+    case 2:
+        REG_NR22 = 8;
+        REG_NR24 = 0x80;
+        break;
+    case 3:
+        REG_NR30 = 0;
+        break;
+    default:
+        REG_NR42 = 8;
+        REG_NR44 = 0x80;
+    }
+}
+
+static inline int CgbPan(struct CgbChannel *chan)
+{
+    u32 rightVolume = chan->rightVolume;
+    u32 leftVolume = chan->leftVolume;
+
+    if ((rightVolume = (u8)rightVolume) >= (leftVolume = (u8)leftVolume))
+    {
+        if (rightVolume / 2 >= leftVolume)
+        {
+            chan->pan = 0x0F;
+            return 1;
+        }
+    }
+    else
+    {
+        if (leftVolume / 2 >= rightVolume)
+        {
+            chan->pan = 0xF0;
+            return 1;
+        }
+    }
+
+    return 0;
+}
+#ifndef NONMATCHING
+NAKED
+#endif
+void CgbModVol(struct CgbChannel *chan)
+{
+#ifdef NONMATCHING
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+
+    if ((soundInfo->mode & 1) || !CgbPan(chan))
+    {
+        chan->pan = 0xFF;
+        chan->eg = (u32)(chan->rightVolume + chan->leftVolume) >> 4;
+    }
+    else
+    {
+        // Force chan->rightVolume and chan->leftVolume to be read from memory again,
+        // even though there is no reason to do so.
+        // The command line option "-fno-gcse" achieves the same result as this.
+        asm("" : : : "memory");
+
+        chan->eg = (u32)(chan->rightVolume + chan->leftVolume) >> 4;
+        if (chan->eg > 15)
+            chan->eg = 15;
+    }
+
+    chan->sg = (chan->eg * chan->su + 15) >> 4;
+    chan->pan &= chan->panMask;
+#else
+    asm_unified("\tpush {r4,lr}\n"
+        "\tadds r1, r0, 0\n"
+        "\tldrb r0, [r1, 0x2]\n"
+        "\tlsls r2, r0, 24\n"
+        "\tlsrs r4, r2, 24\n"
+        "\tldrb r3, [r1, 0x3]\n"
+        "\tlsls r0, r3, 24\n"
+        "\tlsrs r3, r0, 24\n"
+        "\tcmp r4, r3\n"
+        "\tbcc _080AFA94\n"
+        "\tlsrs r0, r2, 25\n"
+        "\tcmp r0, r3\n"
+        "\tbcc _080AFAA0\n"
+        "\tmovs r0, 0xF\n"
+        "\tstrb r0, [r1, 0x1B]\n"
+        "\tb _080AFAAE\n"
+        "_080AFA94:\n"
+        "\tlsrs r0, 25\n"
+        "\tcmp r0, r4\n"
+        "\tbcc _080AFAA0\n"
+        "\tmovs r0, 0xF0\n"
+        "\tstrb r0, [r1, 0x1B]\n"
+        "\tb _080AFAAE\n"
+        "_080AFAA0:\n"
+        "\tmovs r0, 0xFF\n"
+        "\tstrb r0, [r1, 0x1B]\n"
+        "\tldrb r2, [r1, 0x3]\n"
+        "\tldrb r3, [r1, 0x2]\n"
+        "\tadds r0, r2, r3\n"
+        "\tlsrs r0, 4\n"
+        "\tb _080AFABE\n"
+        "_080AFAAE:\n"
+        "\tldrb r2, [r1, 0x3]\n"
+        "\tldrb r3, [r1, 0x2]\n"
+        "\tadds r0, r2, r3\n"
+        "\tlsrs r0, 4\n"
+        "\tstrb r0, [r1, 0xA]\n"
+        "\tcmp r0, 0xF\n"
+        "\tbls _080AFAC0\n"
+        "\tmovs r0, 0xF\n"
+        "_080AFABE:\n"
+        "\tstrb r0, [r1, 0xA]\n"
+        "_080AFAC0:\n"
+        "\tldrb r2, [r1, 0x6]\n"
+        "\tldrb r3, [r1, 0xA]\n"
+        "\tadds r0, r2, 0\n"
+        "\tmuls r0, r3\n"
+        "\tadds r0, 0xF\n"
+        "\tasrs r0, 4\n"
+        "\tstrb r0, [r1, 0x19]\n"
+        "\tldrb r0, [r1, 0x1C]\n"
+        "\tldrb r2, [r1, 0x1B]\n"
+        "\tands r0, r2\n"
+        "\tstrb r0, [r1, 0x1B]\n"
+        "\tpop {r4}\n"
+        "\tpop {r0}\n"
+        "\tbx r0\n");
+#endif
+}
+
+void CgbSound(void)
+{
+    s32 ch;
+    struct CgbChannel *channels;
+    s32 evAdd;
+    s32 prevC15;
+    struct SoundInfo *soundInfo = SOUND_INFO_PTR;
+    vu8 *nrx0ptr;
+    vu8 *nrx1ptr;
+    vu8 *nrx2ptr;
+    vu8 *nrx3ptr;
+    vu8 *nrx4ptr;
+
+    // Most comparision operations that cast to s8 perform 'and' by 0xFF.
+    int mask = 0xff;
+
+    if (soundInfo->c15)
+        soundInfo->c15--;
+    else
+        soundInfo->c15 = 14;
+
+    for (ch = 1, channels = soundInfo->cgbChans; ch <= 4; ch++, channels++)
+    {
+        if (!(channels->sf & 0xc7))
+            continue;
+
+        switch (ch)
+        {
+        case 1:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR10);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR11);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR12);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR13);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR14);
+            break;
+        case 2:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR10+1);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR21);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR22);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR23);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR24);
+            break;
+        case 3:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR30);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR31);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR32);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR33);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR34);
+            break;
+        default:
+            nrx0ptr = (vu8 *)(REG_ADDR_NR30+1);
+            nrx1ptr = (vu8 *)(REG_ADDR_NR41);
+            nrx2ptr = (vu8 *)(REG_ADDR_NR42);
+            nrx3ptr = (vu8 *)(REG_ADDR_NR43);
+            nrx4ptr = (vu8 *)(REG_ADDR_NR44);
+            break;
+        }
+
+        prevC15 = soundInfo->c15;
+        evAdd = *nrx2ptr;
+
+        if (channels->sf & 0x80)
+        {
+            if (!(channels->sf & 0x40))
+            {
+                channels->sf = 3;
+                channels->mo = 3;
+                CgbModVol(channels);
+                switch (ch)
+                {
+                case 1:
+                    *nrx0ptr = channels->sw;
+                    // fallthrough
+                case 2:
+                    *nrx1ptr = ((u32)channels->wp << 6) + channels->le;
+                    goto loc_82E0E30;
+                case 3:
+                    if ((u32)channels->wp != channels->cp)
+                    {
+                        *nrx0ptr = 0x40;
+                        REG_WAVE_RAM0 = channels->wp[0];
+                        REG_WAVE_RAM1 = channels->wp[1];
+                        REG_WAVE_RAM2 = channels->wp[2];
+                        REG_WAVE_RAM3 = channels->wp[3];
+                        channels->cp = (u32)channels->wp;
+                    }
+                    *nrx0ptr = 0;
+                    *nrx1ptr = channels->le;
+                    if (channels->le)
+                        channels->n4 = -64;
+                    else
+                        channels->n4 = -128;
+                    break;
+                default:
+                    *nrx1ptr = channels->le;
+                    *nrx3ptr = (u32)channels->wp << 3;
+                loc_82E0E30:
+                    evAdd = channels->at + 8;
+                    if (channels->le)
+                        channels->n4 = 64;
+                    else
+                        channels->n4 = 0;
+                    break;
+                }
+                channels->ec = channels->at;
+                if ((s8)(channels->at & mask))
+                {
+                    channels->ev = 0;
+                    goto EC_MINUS;
+                }
+                else
+                {
+                    goto loc_82E0F96;
+                }
+            }
+            else
+            {
+                goto loc_82E0E82;
+            }
+        }
+        else if (channels->sf & 0x04)
+        {
+            channels->echoLength--;
+            if ((s8)(channels->echoLength & mask) <= 0)
+            {
+            loc_82E0E82:
+                CgbOscOff(ch);
+                channels->sf = 0;
+                goto LAST_LABEL;
+            }
+            goto loc_82E0FD6;
+        }
+        else if ((channels->sf & 0x40) && (channels->sf & 0x03))
+        {
+            channels->sf &= 0xfc;
+            channels->ec = channels->re;
+            if ((s8)(channels->re & mask))
+            {
+                channels->mo |= 1;
+                if (ch != 3)
+                {
+                    evAdd = channels->re;
+                }
+                goto EC_MINUS;
+            }
+            else
+            {
+                goto loc_82E0F02;
+            }
+        }
+        else
+        {
+        loc_82E0ED0:
+            if (channels->ec == 0)
+            {
+                if (ch == 3)
+                {
+                    channels->mo |= 1;
+                }
+                CgbModVol(channels);
+                if ((channels->sf & 0x3) == 0)
+                {
+                    channels->ev--;
+                    if ((s8)(channels->ev & mask) <= 0)
+                    {
+                    loc_82E0F02:
+                        channels->ev = ((channels->eg * channels->echoVolume) + 0xFF) >> 8;
+                        if (channels->ev)
+                        {
+                            channels->sf |= 0x4;
+                            channels->mo |= 1;
+                            if (ch != 3)
+                            {
+                                evAdd = 8;
+                            }
+                            goto loc_82E0FD6;
+                        }
+                        else
+                        {
+                            goto loc_82E0E82;
+                        }
+                    }
+                    else
+                    {
+                        channels->ec = channels->re;
+                    }
+                }
+                else if ((channels->sf & 0x3) == 1)
+                {
+                loc_82E0F3A:
+                    channels->ev = channels->sg;
+                    channels->ec = 7;
+                }
+                else if ((channels->sf & 0x3) == 2)
+                {
+                    int ev, sg;
+
+                    channels->ev--;
+                    ev = (s8)(channels->ev & mask);
+                    sg = (s8)(channels->sg);
+                    if (ev <= sg)
+                    {
+                    loc_82E0F5A:
+                        if (channels->su == 0)
+                        {
+                            channels->sf &= 0xfc;
+                            goto loc_82E0F02;
+                        }
+                        else
+                        {
+                            channels->sf--;
+                            channels->mo |= 1;
+                            if (ch != 3)
+                            {
+                                evAdd = 8;
+                            }
+                            goto loc_82E0F3A;
+                        }
+                    }
+                    else
+                    {
+                        channels->ec = channels->de;
+                    }
+                }
+                else
+                {
+                    channels->ev++;
+                    if ((u8)(channels->ev & mask) >= channels->eg)
+                    {
+                    loc_82E0F96:
+                        channels->sf--;
+                        channels->ec = channels->de;
+                        if ((u8)(channels->ec & mask))
+                        {
+                            channels->mo |= 1;
+                            channels->ev = channels->eg;
+                            if (ch != 3)
+                            {
+                                evAdd = channels->de;
+                            }
+                        }
+                        else
+                        {
+                            goto loc_82E0F5A;
+                        }
+                    }
+                    else
+                    {
+                        channels->ec = channels->at;
+                    }
+                }
+            }
+        }
+
+    EC_MINUS:
+        channels->ec--;
+        if (prevC15 == 0)
+        {
+            prevC15--;
+            goto loc_82E0ED0;
+        }
+
+    loc_82E0FD6:
+        if (channels->mo & 0x2)
+        {
+            if (ch < 4 && (channels->ty & 0x08))
+            {
+                int biasH = REG_SOUNDBIAS_H;
+
+                if (biasH < 64)
+                {
+                    channels->fr = (channels->fr + 2) & 0x7fc;
+                }
+                else if (biasH < 128)
+                {
+                    channels->fr = (channels->fr + 1) & 0x7fe;
+                }
+            }
+            if (ch != 4)
+            {
+                *nrx3ptr = channels->fr;
+            }
+            else
+            {
+                *nrx3ptr = (*nrx3ptr & 0x08) | channels->fr;
+            }
+            channels->n4 = (channels->n4 & 0xC0) + (*((u8*)(&channels->fr) + 1));
+            *nrx4ptr = (s8)(channels->n4 & mask);
+        }
+
+        if (channels->mo & 1)
+        {
+            REG_NR51 = (REG_NR51 & ~channels->panMask) | channels->pan;
+            if (ch == 3)
+            {
+                *nrx2ptr = gCgb3Vol[channels->ev];
+                if (channels->n4 & 0x80)
+                {
+                    *nrx0ptr = 0x80;
+                    *nrx4ptr = channels->n4;
+                    channels->n4 &= 0x7f;
+                }
+            }
+            else
+            {
+                evAdd &= 0xf;
+                *nrx2ptr = (channels->ev << 4) + evAdd;
+                *nrx4ptr = channels->n4 | 0x80;
+                if (ch == 1 && !(*nrx0ptr & 0x08))
+                {
+                    *nrx4ptr = channels->n4 | 0x80;
+                }
+            }
+        }
+
+    LAST_LABEL:
+        channels->mo = 0;
+    }
+}
+
+void m4aMPlayTempoControl(struct MusicPlayerInfo *mplayInfo, u16 tempo)
+{
+    if (mplayInfo->ident == ID_NUMBER)
+    {
+        mplayInfo->ident++;
+        mplayInfo->tempoU = tempo;
+        mplayInfo->tempoI = (mplayInfo->tempoD * mplayInfo->tempoU) >> 8;
+        mplayInfo->ident = ID_NUMBER;
+    }
+}
+
+void m4aMPlayVolumeControl(struct MusicPlayerInfo *mplayInfo, u16 trackBits, u16 volume)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->volX = volume / 4;
+                track->flags |= MPT_FLG_VOLCHG;
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void m4aMPlayPitchControl(struct MusicPlayerInfo *mplayInfo, u16 trackBits, s16 pitch)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->keyShiftX = pitch >> 8;
+                track->pitX = pitch;
+                track->flags |= MPT_FLG_PITCHG;
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void m4aMPlayPanpotControl(struct MusicPlayerInfo *mplayInfo, u16 trackBits, s8 pan)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->panX = pan;
+                track->flags |= MPT_FLG_VOLCHG;
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void ClearModM(struct MusicPlayerTrack *track)
+{
+    track->lfoSpeedC = 0;
+    track->modM = 0;
+
+    if (track->modT == 0)
+        track->flags |= MPT_FLG_PITCHG;
+    else
+        track->flags |= MPT_FLG_VOLCHG;
+}
+
+void m4aMPlayModDepthSet(struct MusicPlayerInfo *mplayInfo, u16 trackBits, u8 modDepth)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->mod = modDepth;
+
+                if (!track->mod)
+                    ClearModM(track);
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+void m4aMPlayLFOSpeedSet(struct MusicPlayerInfo *mplayInfo, u16 trackBits, u8 lfoSpeed)
+{
+    s32 i;
+    u32 bit;
+    struct MusicPlayerTrack *track;
+
+    if (mplayInfo->ident != ID_NUMBER)
+        return;
+
+    mplayInfo->ident++;
+
+    i = mplayInfo->trackCount;
+    track = mplayInfo->tracks;
+    bit = 1;
+
+    while (i > 0)
+    {
+        if (trackBits & bit)
+        {
+            if (track->flags & MPT_FLG_EXIST)
+            {
+                track->lfoSpeed = lfoSpeed;
+
+                if (!track->lfoSpeed)
+                    ClearModM(track);
+            }
+        }
+
+        i--;
+        track++;
+        bit <<= 1;
+    }
+
+    mplayInfo->ident = ID_NUMBER;
+}
+
+#define MEMACC_COND_JUMP(cond) \
+if (cond)                      \
+    goto cond_true;            \
+else                           \
+    goto cond_false;           \
+
+void ply_memacc(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 op;
+    u8 *addr;
+    u8 data;
+
+    op = *track->cmdPtr;
+    track->cmdPtr++;
+
+    addr = mplayInfo->memAccArea + *track->cmdPtr;
+    track->cmdPtr++;
+
+    data = *track->cmdPtr;
+    track->cmdPtr++;
+
+    switch (op)
+    {
+    case 0:
+        *addr = data;
+        return;
+    case 1:
+        *addr += data;
+        return;
+    case 2:
+        *addr -= data;
+        return;
+    case 3:
+        *addr = mplayInfo->memAccArea[data];
+        return;
+    case 4:
+        *addr += mplayInfo->memAccArea[data];
+        return;
+    case 5:
+        *addr -= mplayInfo->memAccArea[data];
+        return;
+    case 6:
+        MEMACC_COND_JUMP(*addr == data)
+        return;
+    case 7:
+        MEMACC_COND_JUMP(*addr != data)
+        return;
+    case 8:
+        MEMACC_COND_JUMP(*addr > data)
+        return;
+    case 9:
+        MEMACC_COND_JUMP(*addr >= data)
+        return;
+    case 10:
+        MEMACC_COND_JUMP(*addr <= data)
+        return;
+    case 11:
+        MEMACC_COND_JUMP(*addr < data)
+        return;
+    case 12:
+        MEMACC_COND_JUMP(*addr == mplayInfo->memAccArea[data])
+        return;
+    case 13:
+        MEMACC_COND_JUMP(*addr != mplayInfo->memAccArea[data])
+        return;
+    case 14:
+        MEMACC_COND_JUMP(*addr > mplayInfo->memAccArea[data])
+        return;
+    case 15:
+        MEMACC_COND_JUMP(*addr >= mplayInfo->memAccArea[data])
+        return;
+    case 16:
+        MEMACC_COND_JUMP(*addr <= mplayInfo->memAccArea[data])
+        return;
+    case 17:
+        MEMACC_COND_JUMP(*addr < mplayInfo->memAccArea[data])
+        return;
+    default:
+        return;
+    }
+
+cond_true:
+    {
+        void (*func)(struct MusicPlayerInfo *, struct MusicPlayerTrack *) = *(&gMPlayJumpTable[1]);
+        func(mplayInfo, track);
+        return;
+    }
+
+cond_false:
+    track->cmdPtr += 4;
+}
+
+void ply_xcmd(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 n = *track->cmdPtr;
+    track->cmdPtr++;
+
+    gXcmdTable[n](mplayInfo, track);
+}
+
+void ply_xxx(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    void (*func)(struct MusicPlayerInfo *, struct MusicPlayerTrack *) = *(&gMPlayJumpTable[0]);
+    func(mplayInfo, track);
+}
+
+#define READ_XCMD_BYTE(var, n)       \
+{                                    \
+    u32 byte = track->cmdPtr[(n)]; \
+    byte <<= n * 8;                  \
+    (var) &= ~(0xFF << (n * 8));     \
+    (var) |= byte;                   \
+}
+
+void ply_xwave(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    u32 wav;
+
+    READ_XCMD_BYTE(wav, 0) // UB: uninitialized variable
+    READ_XCMD_BYTE(wav, 1)
+    READ_XCMD_BYTE(wav, 2)
+    READ_XCMD_BYTE(wav, 3)
+
+    track->tone.wav = (struct WaveData *)wav;
+    track->cmdPtr += 4;
+}
+
+void ply_xtype(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.type = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xatta(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.attack = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xdeca(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.decay = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xsust(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.sustain = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xrele(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.release = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xiecv(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->echoVolume = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xiecl(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->echoLength = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xleng(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.length = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void ply_xswee(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track)
+{
+    track->tone.pan_sweep = *track->cmdPtr;
+    track->cmdPtr++;
+}
+
+void DummyFunc()
+{
+    ;
+}