static void
SelectWaveAndPlayNote(struct namcona *chip, struct sequence *pSequence, int chan, UINT8 data )
{
struct voice *pVoice = &chip->mVoice[pSequence->channel[chan]];
int bank = 0x20000 + pVoice->bank*0x20000;
int addr = ReadMetaDataWord(chip,4)+10*data;
float pbase = (float)SAMPLE_RATE_BASE / (float)Machine->sample_rate;
INT32 frequency;
pVoice->flags = ReadMetaDataWord(chip,addr+0*2);
pVoice->start = ReadMetaDataWord(chip,addr+3*2)*2+bank;
pVoice->end = ReadMetaDataWord(chip,addr+4*2)*2+bank;
pVoice->loop = pVoice->start;
pVoice->start <<= FIXED_POINT_SHIFT;
pVoice->end <<= FIXED_POINT_SHIFT;
pVoice->loop <<= FIXED_POINT_SHIFT;
pVoice->leftVolume = ReadMetaDataByte(chip,addr+1*2);
pVoice->rightVolume = ReadMetaDataByte(chip,addr+1*2+1);
frequency = ReadMetaDataWord(chip,addr+2*2);
pVoice->delta = (long)((float)frequency * pbase);
pVoice->delta >>= 16-FIXED_POINT_SHIFT;
pVoice->bActive = 2;
pVoice->pos = pVoice->start;
} /* SelectWaveAndPlayNote */
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
MapArgs( struct sequence *pSequence,
int bCommon,
void (*callback)( struct sequence *, int chan, data8_t data ) )
{
data8_t set = ReadMetaDataByte(pSequence->addr++);
data8_t data = 0;
int i;
if( bCommon )
{
data = ReadMetaDataByte( pSequence->addr++ );
}
for( i=0; i<8; i++ )
{
if( set&(1<<(7-i)) )
{
if( !bCommon )
{
data = ReadMetaDataByte( pSequence->addr++ );
}
callback( pSequence, i, data );
}
}
} /* MapArgs */
static void
MapArgs(struct namcona *chip, struct sequence *pSequence,
int bCommon,
void (*callback)( struct namcona *chip, struct sequence *, int chan, UINT8 data ) )
{
UINT8 set = ReadMetaDataByte(chip,pSequence->addr++);
UINT8 data = 0;
int i;
if( bCommon )
{
data = ReadMetaDataByte( chip, pSequence->addr++ );
}
for( i=0; i<8; i++ )
{
if( set&(1<<(7-i)) )
{
if( !bCommon )
{
data = ReadMetaDataByte( chip,pSequence->addr++ );
}
callback( chip, pSequence, i, data );
}
}
} /* MapArgs */
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 data16_t
ReadMetaDataWord( int addr )
{
return ReadMetaDataByte(addr)+ReadMetaDataByte(addr+1)*256;
} /* ReadMetaDataWord */
static UINT16
ReadMetaDataWord( struct namcona *chip, int addr )
{
return ReadMetaDataByte(chip, addr)+ReadMetaDataByte(chip, addr+1)*256;
} /* ReadMetaDataWord */