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Attempt to always emit the correct number of NOTE ONs and NOTE OFFs.

This commit is contained in:
Jonathan Moore Liles 2012-02-27 00:02:11 -08:00
parent 614fea7343
commit 0e946a9f73
1 changed files with 55 additions and 36 deletions
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91
src/jack.C
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@ -56,10 +56,11 @@ const int subticks_per_tick = 4096;
* purpose). Decremented in each process cycle, when this value
* reaches zero, a note off is generated--regardless of the state of
* the transport */
int notes_on[MAX_PORT][16][128];
int note_duration[MAX_PORT][16][128];
/* number of notes currently playing on each port */
int port_notes_on[MAX_PORT];
/* tracks the number of concurrent note ons for the same note so that
* we can be sure to emit the correct number of note offs */
int notes_on[MAX_PORT][16][128];
typedef unsigned char byte_t;
@ -109,8 +110,34 @@ midi_output_event ( int port, const midievent *e )
freelist.unlink( fe );
*fe = *e;
if ( e->is_note_on() )
{
if ( notes_on[ port ][ e->channel() ][ e->note() ] == 0 )
{
output[ port ].events.insert( fe );
++notes_on[ port ][ e->channel() ][ e->note() ];
}
else
{
DMESSAGE( "Dropping extra Note ON" );
}
}
else if ( e->is_note_off() )
{
if ( notes_on[ port ][ e->channel() ][ e->note() ] == 0 )
{
DMESSAGE( "Dropping extra Note OFF" );
WARNING( "Extra Note OFF" );
}
else
{
output[ port ].events.insert( fe );
output[ port ].events.insert( fe );
--notes_on[ port ][ e->channel() ][ e->note() ];
}
}
}
}
@ -120,22 +147,14 @@ midi_output_event ( int port, const midievent *e, tick_t duration )
{
if ( duration )
{
if ( notes_on[ port ][ e->channel() ][ e->note() ] > transport.ticks_per_period * subticks_per_tick )
DWARNING( "duplicate note on?" );
else
{
notes_on[ port ][ e->channel() ][ e->note() ] = (duration + e->timestamp()) * subticks_per_tick;
++port_notes_on[ port ];
midi_output_event( port, e );
}
note_duration[ port ][ e->channel() ][ e->note() ] = (duration + e->timestamp()) * subticks_per_tick;
midi_output_event( port, e );
}
else
{
/* if ( notes_on[ port ][ e->channel() ][ e->note() ] ) */
/* WARNING( "note still on when note-off came" ); */
/* We allow duplicate notes on and pass notes off through as
* is in order to support poly synths. */
midi_output_event( port, e );
}
}
@ -176,8 +195,7 @@ midi_output_immediate_event ( int port, const midievent *e )
if ( e->is_note_on() )
{
/* use timestamp as duration */
notes_on[ port ][ e->channel() ][ e->note() ] = e->timestamp() * subticks_per_tick;
++port_notes_on[ port ];
note_duration[ port ][ e->channel() ][ e->note() ] = e->timestamp() * subticks_per_tick;
}
}
@ -355,34 +373,33 @@ schedule:
output[ i ].buf = jack_port_get_buffer( output[ i ].port, nframes );
jack_midi_clear_buffer( output[ i ].buf );
if ( port_notes_on[ i ] > 0 )
{
/* handle scheduled note offs */
for ( uint j = 16; j-- ; )
{
register int *note = &notes_on[ i ][ j ][ 0 ];
register int *note = &note_duration[ i ][ j ][ 0 ];
for ( register uint k = 0; k < 128; ++note, ++k )
if ( *note )
if ( *note > 0 )
if ( ( *note -= subticks_per_period ) <= 0 )
{
static midievent e;
e.status( midievent::NOTE_OFF );
e.channel( j );
e.note( k );
e.note_velocity( 64 );
e.timestamp( (subticks_per_period + *note) / subticks_per_tick );
while ( notes_on[ i ][ j ][ k] > 0 )
{
static midievent e;
e.status( midievent::NOTE_OFF );
e.channel( j );
e.note( k );
e.note_velocity( 64 );
e.timestamp( (subticks_per_period + *note) / subticks_per_tick );
midi_output_event( i, &e );
}
*note = 0;
--port_notes_on[ i ];
midi_output_event( i, &e );
}
}
}
static midievent e;
/* first, write any immediate events from the UI thread */
@ -452,10 +469,12 @@ midi_init ( void )
/* clear notes */
for ( int p = MAX_PORT; p--; )
{
port_notes_on[ p ] = 0;
for ( int c = 16; c-- ; )
for ( int n = 128; n-- ; )
{
note_duration[ p ][ c ][ n ] = 0;
notes_on[ p ][ c ][ n ] = 0;
}
}
//1 jack_set_buffer_size_callback( client, bufsize, 0 );