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fmasgn.c
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fmasgn.c
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// fmasgn.c
#include "fmtype.h"
#include "fmasgn.h"
#include "fmvoice.h"
// Variable
static Fmvoice _fmvc[MAX_FM_VOICE];
static Fmvoice* _firstEmptyVc; // old
static Fmvoice* _lastEmptyVc; // new
static Fmvoice* _firstOccupiedVc; // old
static Fmvoice* _lastOccupiedVc; // new
// Prototype
static void setToEmptyList( Fmvoice* prevVc, Fmvoice* rlsVc );
// setter
void Asgn_setFirstEmptyVc( Fmvoice* vc ){ _firstEmptyVc = vc; }
void Asgn_setLastEmptyVc( Fmvoice* vc ){ _lastEmptyVc = vc; }
// getter
Fmvoice* Asgn_voice( int num ){ return &(_fmvc[num]); }
Fmvoice* Asgn_firstEmptyVc( void ){ return _firstEmptyVc; }
Fmvoice* Asgn_lastEmptyVc( void ){ return _lastEmptyVc; }
void Asgn_init( void )
{
int i;
for ( i=0; i<MAX_FM_VOICE; i++) {
Fmvoice_init(&_fmvc[i]);
}
_firstOccupiedVc = 0;
_lastOccupiedVc = 0;
for ( i=0; i<MAX_FM_VOICE-1; i++ ){
Fmvoice_setVoiceNum(&_fmvc[i], i);
Fmvoice_setNextVc(&_fmvc[i], &_fmvc[i + 1]);
}
// for No.MAX_FM_VOICE-1
Fmvoice_setVoiceNum(&_fmvc[MAX_FM_VOICE - 1], MAX_FM_VOICE - 1);
Fmvoice_setNextVc(&_fmvc[MAX_FM_VOICE - 1], FMNULL);
_firstEmptyVc = &_fmvc[0];
_lastEmptyVc = &_fmvc[MAX_FM_VOICE-1];
}
bool Asgn_chkEmpty( void )
{
if ( _firstEmptyVc == FMNULL ){ return false; }
else { return true; }
}
Fmvoice* Asgn_getEmptyVc( void )
{
if ( _firstEmptyVc != FMNULL ){
Fmvoice* ret = _firstEmptyVc;
_firstEmptyVc = Fmvoice_nextVc(_firstEmptyVc);
if ( _lastOccupiedVc != FMNULL ){
Fmvoice_setNextVc(_lastOccupiedVc, ret);
}
_lastOccupiedVc = ret;
if ( _firstOccupiedVc == FMNULL ){
_firstOccupiedVc = ret;
}
return ret;
}
else {
FMASSERT(0);
return FMNULL;
}
}
void Asgn_releaseOneVc( void )
{
if ( _firstOccupiedVc == FMNULL ){
FMASSERT(0);
return;
}
// Search keyoffed Voice
Fmvoice* rlsVc = _firstOccupiedVc;
Fmvoice* prevVc = FMNULL;
while (rlsVc != FMNULL ){
if ( Fmvoice_isKeyon(rlsVc) == false ){
break;
}
prevVc = rlsVc;
rlsVc = Fmvoice_nextVc(rlsVc);
}
// if no keyoffed vc, select first one.
if ( rlsVc == FMNULL ){
rlsVc = _firstOccupiedVc;
}
setToEmptyList(prevVc,rlsVc);
}
void Asgn_releaseParticularVc( Fmvoice* pVc )
{
// Search pVc & its prevVc
Fmvoice* rlsVc = _firstOccupiedVc;
Fmvoice* prevVc = FMNULL;
while ( rlsVc != FMNULL ){
if ( pVc == rlsVc ){
break;
}
prevVc = rlsVc;
rlsVc = Fmvoice_nextVc(rlsVc);
}
setToEmptyList(prevVc,rlsVc);
}
static void setToEmptyList( Fmvoice* prevVc, Fmvoice* rlsVc )
{
// Release from Occupied list
if ( rlsVc == _firstOccupiedVc ){
_firstOccupiedVc = Fmvoice_nextVc(rlsVc);
}
if ( rlsVc == _lastOccupiedVc ){
_lastOccupiedVc = prevVc;
}
if ( prevVc != FMNULL ){
Fmvoice_setNextVc(prevVc, Fmvoice_nextVc(rlsVc));
}
Fmvoice_release(rlsVc);
// Set Empty list
Fmvoice_setNextVc(_lastEmptyVc, rlsVc);
_lastEmptyVc = rlsVc;
if ( _firstEmptyVc == FMNULL ){
_firstEmptyVc = rlsVc;
}
}