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cmMidiFile.c : cmMidiFileCalcNoteDuration() now update the durTicks field of

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sustain pedal messages with the length of time the sustain pedal is held down.
This commit is contained in:
Kevin Larke 2015-02-24 15:39:38 -08:00
parent 1a0b88016e
commit ec6c2d8593
1 changed files with 24 additions and 4 deletions
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28
cmMidiFile.c
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@ -1212,10 +1212,11 @@ void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
if( p->msgN == 0 ) if( p->msgN == 0 )
return; return;
unsigned mi = cmInvalidId; unsigned mi = cmInvalidId;
_cmMidiVoice_t* list = NULL; // list of active voices _cmMidiVoice_t* list = NULL; // list of active voices
_cmMidiVoice_t* vp = NULL; _cmMidiVoice_t* vp = NULL;
bool sustainFlagV[ kMidiChCnt ]; cmMidiTrackMsg_t* sustainPedalDownMsg = NULL;
bool sustainFlagV[ kMidiChCnt ];
// clear the sustain pedal flag // clear the sustain pedal flag
for(mi=0; mi<kMidiChCnt; ++mi) for(mi=0; mi<kMidiChCnt; ++mi)
@ -1229,6 +1230,10 @@ void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
for(vp = list; vp!=NULL; vp=vp->link) for(vp = list; vp!=NULL; vp=vp->link)
vp->durTicks += mp->dtick; vp->durTicks += mp->dtick;
// update the sustain pedal duration
if( sustainPedalDownMsg != NULL )
((cmMidiChMsg_t*)(sustainPedalDownMsg->u.chMsgPtr))->durTicks += mp->dtick; // cast away const
// //
// If this is sustain pedal msg // If this is sustain pedal msg
// //
@ -1243,10 +1248,25 @@ void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
// if the pedal went down ... // if the pedal went down ...
if( sustainFlagV[chIdx] ) 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))->durTicks = 0; // cast away const
}
_cmMidiFileCalcNoteDurationsAllocVoice( &list, mp, true ); _cmMidiFileCalcNoteDurationsAllocVoice( &list, mp, true );
} }
else // ... if the pedal went up else // ... if the pedal went up
{ {
sustainPedalDownMsg = NULL;
// ... then release sustaining notes // ... then release sustaining notes
_cmMidiVoice_t* pp = NULL; _cmMidiVoice_t* pp = NULL;
for(vp=list; vp != NULL; ) for(vp=list; vp != NULL; )