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cmMidiFile.h/c : Added 'end' field to cmMidiChMsg_t and setting code. Not yet tested.

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This commit is contained in:
kevin 2016-06-23 19:17:58 -04:00
parent de1649b204
commit 2b01371684
2 changed files with 12 additions and 176 deletions
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181
cmMidiFile.c
View File

@ -1304,182 +1304,13 @@ typedef struct _cmMidiVoice_str
} _cmMidiVoice_t;
void _cmMidFileCalcNoteDurationReleaseNote( _cmMidiVoice_t** listPtrPtr, _cmMidiVoice_t* pp, _cmMidiVoice_t* vp )
{
assert( (pp==NULL && vp==*listPtrPtr) || pp->link==vp);
// store the duration of the note into the track msg
// assoc'd with the note-on msg
cmMidiChMsg_t* cmp = (cmMidiChMsg_t*)vp->mp->u.chMsgPtr; // cast away const
cmp->durMicros = vp->durMicros;
_cmMidiVoice_t* np = vp->link;
// release the voice msg
cmMemFree(vp);
// unlink the active voice msg
if( pp == NULL )
*listPtrPtr = np;
else
pp->link = np;
}
void _cmMidiFileCalcNoteDurationsAllocVoice( _cmMidiVoice_t** listPtrPtr, cmMidiTrackMsg_t* mp, bool sustainFl )
{
_cmMidiVoice_t* vp = cmMemAllocZ(_cmMidiVoice_t,1);
vp->mp = mp;
vp->sustainFl = sustainFl;
vp->link = *listPtrPtr;
*listPtrPtr = vp;
}
void cmMidiFileCalcNoteDurations2( cmMidiFileH_t h )
{
_cmMidiFile_t* p;
if((p = _cmMidiFileHandleToPtr(h)) == NULL )
return;
if( p->msgN == 0 )
return;
unsigned mi = cmInvalidId;
_cmMidiVoice_t* list = NULL; // list of active voices
_cmMidiVoice_t* vp = NULL;
cmMidiTrackMsg_t* sustainPedalDownMsg = NULL;
bool sustainFlagV[ kMidiChCnt ];
// clear the sustain pedal flag
for(mi=0; mi<kMidiChCnt; ++mi)
sustainFlagV[mi]=false;
for(mi=0; mi<p->msgN; ++mi)
{
cmMidiTrackMsg_t* mp = p->msgV[mi];
unsigned d_amicro = 0;
if( mi > 0 )
{
assert( mp->amicro >= p->msgV[mi-1]->amicro );
d_amicro = mp->amicro - p->msgV[mi-1]->amicro;
}
// update the duration of the sounding notes
for(vp = list; vp!=NULL; vp=vp->link)
vp->durMicros += d_amicro;
// update the sustain pedal duration
if( sustainPedalDownMsg != NULL )
((cmMidiChMsg_t*)(sustainPedalDownMsg->u.chMsgPtr))->durMicros += d_amicro; // cast away const
//
// If this is sustain pedal msg
//
if( mp->status==kCtlMdId && mp->u.chMsgPtr->d0 == kSustainCtlMdId )
{
unsigned chIdx = mp->u.chMsgPtr->ch;
assert( chIdx < kMidiChCnt );
// set the state of the sustain pedal flags
sustainFlagV[chIdx] = mp->u.chMsgPtr->d1 >= 64;
// if the pedal went down ...
if( sustainFlagV[chIdx] )
{
if( sustainPedalDownMsg != NULL )
{
// TODO: the correct way to handle this is to maintain multiple sustain pedals
//cmErrMsg(&p->err,kSustainPedalMfRC,"Sustain pedal down with no intervening sustain pedal up.");
}
else
{
sustainPedalDownMsg = mp;
((cmMidiChMsg_t*)(sustainPedalDownMsg->u.chMsgPtr))->durMicros = 0; // cast away const
}
_cmMidiFileCalcNoteDurationsAllocVoice( &list, mp, true );
}
else // ... if the pedal went up
{
sustainPedalDownMsg = NULL;
// ... then release sustaining notes
_cmMidiVoice_t* pp = NULL;
for(vp=list; vp != NULL; )
{
_cmMidiVoice_t* np = vp->link;
if( vp->sustainFl && (vp->mp->u.chMsgPtr->ch == chIdx) )
_cmMidFileCalcNoteDurationReleaseNote(&list,pp,vp);
else
pp = vp;
vp = np;
}
}
}
//
// if this is a note-on msg
//
if( mp->status==kNoteOnMdId && mp->u.chMsgPtr->d1>0 )
{
_cmMidiFileCalcNoteDurationsAllocVoice( &list, mp, false );
}
else
//
// if this is a note-off msg
//
if( (mp->status==kNoteOnMdId && mp->u.chMsgPtr->d1==0) || (mp->status==kNoteOffMdId) )
{
_cmMidiVoice_t* pp = NULL;
unsigned chIdx = mp->u.chMsgPtr->ch;
assert( chIdx < kMidiChCnt );
// for each active voice
for(vp=list; vp!=NULL; vp=vp->link )
{
// if this active voice ch/pitch matches the note-off msg ch pitch
if( (vp->mp->u.chMsgPtr->d0==mp->u.chMsgPtr->d0) && (vp->mp->u.chMsgPtr->ch==chIdx) )
{
// if the sustain pedal is down for this channel - then defer turning the note off
if( sustainFlagV[chIdx] )
vp->sustainFl = true;
else
_cmMidFileCalcNoteDurationReleaseNote(&list,pp,vp);
break;
}
pp = vp;
} // end for
} // end if
} // end-for
// check for hung notes
_cmMidiVoice_t* np = NULL;
vp = list;
while( vp != NULL )
{
np = vp->link;
if( cmMidiIsNoteOn(vp->mp->status) == false )
cmErrMsg(&p->err,kMissingNoteOffMfRC,"Missing note-off for note-on:%s",cmMidiToSciPitch(vp->mp->u.chMsgPtr->d0,NULL,0));
cmMemFree(vp);
vp = np;
}
}
void _cmMidiFileSetDur( cmMidiTrackMsg_t* m0, cmMidiTrackMsg_t* m1 )
{
// calculate the duration of the sounding note
((cmMidiChMsg_t*)m0->u.chMsgPtr)->durMicros = m1->amicro - m0->amicro;
// set the note-off msg pointer
((cmMidiChMsg_t*)m0->u.chMsgPtr)->end = m1;
}
bool _cmMidiFileCalcNoteDur( cmMidiTrackMsg_t* m0, cmMidiTrackMsg_t* m1, int noteGateFl, int sustainGateFl, bool sostGateFl )
@ -1628,6 +1459,7 @@ void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
if( sustV[ch] != NULL )
{
_cmMidiFileSetDur(sustV[ch],m);
((cmMidiChMsg_t*)sustV[ch]->u.chMsgPtr)->end = m; // set the pedal-up msg ptr. in the pedal-down msg.
sustV[ch] = NULL;
}
}
@ -1635,7 +1467,7 @@ void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
}
else
// This is a sostenuto-pedal down msg
// This is a sostenuto pedal-down msg
if( cmMidiFileIsSostenutoPedalDown(m) )
{
// if the sustain channel is already down
@ -1651,7 +1483,7 @@ void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
}
else
// This is a sostenuto-pedal up msg
// This is a sostenuto pedal-up msg
if( cmMidiFileIsSostenutoPedalUp(m) )
{
// if the sustain channel is already up
@ -1678,6 +1510,7 @@ void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
if( sostV[ch] != NULL )
{
_cmMidiFileSetDur(sostV[ch],m);
((cmMidiChMsg_t*)sostV[ch]->u.chMsgPtr)->end = m; // set the pedal-up msg ptr. in the pedal-down msg.
sostV[ch] = NULL;
}

3
cmMidiFile.h
View File

@ -52,12 +52,15 @@ extern "C" {
cmMidiByte_t scale;
} cmMidiKeySig_t;
struct cmMidiTrackMsg_str;
typedef struct
{
cmMidiByte_t ch;
cmMidiByte_t d0;
cmMidiByte_t d1;
unsigned durMicros; // note duration in microseconds (corrected for tempo changes)
struct cmMidiTrackMsg_str* end; // note-off or pedal-up message
} cmMidiChMsg_t;