static void
HandleSubroutine(struct namcona *chip, struct sequence *pSequence )
{
int addr = ReadMetaDataWord(chip, pSequence->addr );
PushSequenceAddr(chip, pSequence, pSequence->addr+2 );
pSequence->addr = addr;
} /* HandleSubroutine */
static void
PanCtrlTable(struct namcona *chip, struct sequence *pSequence, int chan, UINT8 data )
{
struct voice *pVoice = &chip->mVoice[pSequence->channel[chan]];
int addr = ReadMetaDataWord(chip,12) + data*4;
pVoice->panCtrlTable = addr;
pVoice->panCtrlSpeed = ReadMetaDataByte(chip,addr+3);
if( pVoice->panCtrlSpeed & 0x80)
pVoice->panCtrlSpeed = -(0x100 - pVoice->panCtrlSpeed);
} /* PanCtrlTable */
static void
UpdateSequence(struct namcona *chip, struct sequence *pSequence )
{
UINT16 *pStatus = GetSequenceStatusAddr(chip,pSequence);
UINT16 data = *pStatus;
if( data&0x0040 )
{ /* bit 0x0040 indicates that a sound request was written by the main CPU */
int offs = ReadMetaDataWord(chip,0)+(data>>8)*2;
memset( pSequence, 0x00, sizeof(struct sequence) );
if( pSequence == &chip->mSequence[0] ) Silence(chip); /* hack! */
pSequence->addr = ReadMetaDataWord(chip,offs);
*pStatus = (data&0xffbf)|0x0080; /* set "sequence-is-playing" flag */
}
static void
HandleRepeatOut( struct sequence *pSequence )
{
int count = ReadMetaDataByte( pSequence->addr++ );
int addr = ReadMetaDataWord( pSequence->addr );
if( pSequence->count2 < count )
{
pSequence->count2++;
pSequence->addr += 2;
}
else
{
pSequence->count2 = 0;
pSequence->addr = addr;
}
} /* HandleRepeatOut */
static void
HandleRepeat(struct namcona *chip, struct sequence *pSequence )
{
int count = ReadMetaDataByte( chip, pSequence->addr++ );
int addr = ReadMetaDataWord(chip, pSequence->addr );
if( pSequence->count < count )
{
pSequence->count++;
pSequence->addr = addr;
}
else
{
pSequence->count = 0;
pSequence->addr += 2;
}
} /* HandleRepeat */
static void
SelectWave( struct sequence *pSequence, int chan, data8_t data )
{
struct voice *pVoice = &mVoice[pSequence->channel[chan]];
int bank = 0x20000 + pVoice->bank*0x20000;
int addr = ReadMetaDataWord(2)+10*data;
pVoice->flags = ReadMetaDataWord(addr+0*2);
pVoice->start = ReadMetaDataWord(addr+1*2)*2+bank;
pVoice->end = ReadMetaDataWord(addr+2*2)*2+bank;
pVoice->loop = ReadMetaDataWord(addr+3*2)*2+bank;
pVoice->baseFreq = ReadMetaDataWord(addr+4*2); /* unsure what this is; not currently used */
pVoice->start <<= FIXED_POINT_SHIFT;
pVoice->end <<= FIXED_POINT_SHIFT;
pVoice->loop <<= FIXED_POINT_SHIFT;
pVoice->bActive = 0;
pVoice->dnote = 0;
pVoice->detune = 0;
} /* SelectWave */
