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-rw-r--r--src/m4a_4.c384
1 files changed, 384 insertions, 0 deletions
diff --git a/src/m4a_4.c b/src/m4a_4.c
new file mode 100644
index 0000000..595ea5a
--- /dev/null
+++ b/src/m4a_4.c
@@ -0,0 +1,384 @@
+#include "gba/m4a_internal.h"
+
+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()
+{
+ ;
+}
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