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/*
MidiWidgetsManager.m:
Copyright (C) 2014 Steven Yi, Aurelius Prochazka
This file is part of Csound for iOS.
The Csound for iOS Library is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
Csound is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Csound; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
*/
#import "MidiWidgetsManager.h"
#import "SliderMidiWidgetWrapper.h"
void MidiWidgetsManagerReadProc(const MIDIPacketList *pktlist, void *refcon, void *srcConnRefCon);
@implementation MidiWidgetsManager
-(id)init {
if(self = [super init]) {
_widgetWrappers = [[NSMutableArray alloc] init];
for (int i = 0; i < 128; i++) {
[_widgetWrappers addObject:[NSNull null]];
}
}
return self;
}
-(void)addSlider:(UISlider *)slider forControllerNumber:(int)controllerNumber {
SliderMidiWidgetWrapper *wrapper = [[SliderMidiWidgetWrapper alloc] init:slider];
[self addMidiWidgetWrapper:wrapper forControllerNumber:controllerNumber];
}
-(void)addMidiWidgetWrapper:(id<MidiWidgetWrapper>)wrapper
forControllerNumber:(int)controllerNumber {
if (controllerNumber < 0 || controllerNumber > 127) {
NSLog(@"Error: Attempted to add a widget with controller number outside of range 0-127: %d", controllerNumber);
return;
}
[_widgetWrappers replaceObjectAtIndex:controllerNumber withObject:wrapper];
}
/* coremidi callback, called when MIDI data is available */
void MidiWidgetsManagerReadProc(const MIDIPacketList *pktlist, void *refcon, void *srcConnRefCon){
MidiWidgetsManager* manager = (__bridge MidiWidgetsManager *)refcon;
MIDIPacket *packet = &((MIDIPacketList *)pktlist)->packet[0];
Byte *curpack;
int i, j;
for (i = 0; i < pktlist->numPackets; i++) {
for(j=0; j < packet->length; j+=3){
curpack = packet->data+j;
if ((*curpack++ | 0xB0) > 0) {
unsigned int controllerNumber = (unsigned int)(*curpack++);
unsigned int controllerValue = (unsigned int)(*curpack++);
id wrapper = [manager.widgetWrappers objectAtIndex:controllerNumber];
//NSLog(@"Controller Number: %d Value: %d", controllerNumber, controllerValue);
if (wrapper != [NSNull null]) {
[(id<MidiWidgetWrapper>)wrapper setMIDIValue:controllerValue];
}
}
}
packet = MIDIPacketNext(packet);
}
}
#pragma mark CoreMidi Code
-(void)openMidiIn {
int k;
ItemCount endpoints;
CFStringRef name = NULL, cname = NULL, pname = NULL;
CFStringEncoding defaultEncoding = CFStringGetSystemEncoding();
MIDIPortRef mport = 0;
MIDIEndpointRef endpoint;
OSStatus ret;
/* MIDI client */
cname = CFStringCreateWithCString(NULL, "my client", defaultEncoding);
ret = MIDIClientCreate(cname, NULL, NULL, &mclient);
if(!ret){
/* MIDI output port */
pname = CFStringCreateWithCString(NULL, "outport", defaultEncoding);
ret = MIDIInputPortCreate(mclient, pname, MidiWidgetsManagerReadProc, (__bridge void *)(self), &mport);
if(!ret){
/* sources, we connect to all available input sources */
endpoints = MIDIGetNumberOfSources();
//NSLog(@"midi srcs %d\n", endpoints);
for(k=0; k < endpoints; k++){
endpoint = MIDIGetSource(k);
MIDIPortConnectSource(mport, endpoint, NULL);
}
}
}
if(name) CFRelease(name);
if(pname) CFRelease(pname);
if(cname) CFRelease(cname);
}
-(void)closeMidiIn {
MIDIClientDispose(mclient);
}
@end
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