drivers/midi/VirtualMidiDevice.cpp

/*
    Copyright (C) 2008 - 2012 Christian Schoenebeck
 */

#include "VirtualMidiDevice.h"

#include "../../common/global_private.h"
#include "../../common/atomic.h"
#include "../../common/RingBuffer.h"

#define MIDI_KEYS               128
#define MIDI_CONTROLLERS        128

// assuming VirtualMidiDevice implementation is only controlled
// by mouse (and the user not being Billy the Kid)
#define MAX_EVENTS  12

namespace LinuxSampler {

    struct VirtualMidiDevice::private_data_t {
        atomic_t notesChanged; // whether some key changed at all
        atomic_t pNoteChanged[MIDI_KEYS]; // which key(s) changed
        atomic_t pNoteIsActive[MIDI_KEYS]; // status of each key (either active or inactive)
        atomic_t pNoteOnVelocity[MIDI_KEYS];
        atomic_t pNoteOffVelocity[MIDI_KEYS];
        atomic_t ccsChanged; // whether some controller changed at all
        atomic_t pCCChanged[MIDI_CONTROLLERS]; // which controller(s) changed
        atomic_t pCCValue[MIDI_CONTROLLERS]; // current value of each controller
        RingBuffer<VirtualMidiDevice::event_t,false> events;

        private_data_t() : events(MAX_EVENTS, 0) {}
    };

    VirtualMidiDevice::VirtualMidiDevice() : p(new private_data_t) {
        atomic_t zero = ATOMIC_INIT(0);
        atomic_t defaultVelocity = ATOMIC_INIT(127);
        atomic_t defaultCCValue = ATOMIC_INIT(0);
        p->notesChanged = zero;
        p->ccsChanged   = zero;
        for (int i = 0; i < MIDI_KEYS; i++) {
            p->pNoteChanged[i]  = zero;
            p->pNoteIsActive[i] = zero;
            p->pNoteOnVelocity[i] = defaultVelocity;
            p->pNoteOffVelocity[i] = defaultVelocity;
            p->pCCChanged[i] = zero;
            p->pCCValue[i]   = defaultCCValue;
        }
    }

    VirtualMidiDevice::~VirtualMidiDevice() {
        delete p;
    }
    
    void VirtualMidiDevice::SetMaxEvents(int n) {
        p->events.resize(n);
    }

    bool VirtualMidiDevice::SendNoteOnToSampler(uint8_t Key, uint8_t Velocity) {
        if (Key >= MIDI_KEYS || Velocity > 127) return false;
        event_t ev = { EVENT_TYPE_NOTEON, Key, Velocity };
        if (p->events.write_space() <= 0) return false;
        p->events.push(&ev);
        return true;
    }

    bool VirtualMidiDevice::SendNoteOffToSampler(uint8_t Key, uint8_t Velocity) {
        if (Key >= MIDI_KEYS || Velocity > 127) return false;
        event_t ev = { EVENT_TYPE_NOTEOFF, Key, Velocity };
        if (p->events.write_space() <= 0) return false;
        p->events.push(&ev);
        return true;
    }
    
    bool VirtualMidiDevice::SendCCToSampler(uint8_t Controller, uint8_t Value) {
        if (Controller >= MIDI_CONTROLLERS || Value > 127) return false;
        event_t ev = { EVENT_TYPE_CC, Controller, Value };
        if (p->events.write_space() <= 0) return false;
        p->events.push(&ev);
        return true;
    }

    bool VirtualMidiDevice::GetMidiEventFromDevice(event_t& Event) {
        return (p->events.pop(&Event) > 0);
    }

    bool VirtualMidiDevice::NotesChanged() {
        int c = atomic_read( &p->notesChanged );
        atomic_sub(c, &p->notesChanged );
        return c;
    }
    
    bool VirtualMidiDevice::ControllersChanged() {
        int c = atomic_read( &p->ccsChanged );
        atomic_sub(c, &p->ccsChanged );
        return c;
    }

    bool VirtualMidiDevice::NoteChanged(uint8_t Key) {
        int c = atomic_read( &(p->pNoteChanged)[Key] );
        atomic_sub(c, &(p->pNoteChanged)[Key] );
        return c;
    }
    
    bool VirtualMidiDevice::ControllerChanged(uint8_t Controller) {
        int c = atomic_read( &(p->pCCChanged)[Controller] );
        atomic_sub(c, &(p->pCCChanged)[Controller] );
        return c;
    }

    bool VirtualMidiDevice::NoteIsActive(uint8_t Key) {
        return atomic_read( &(p->pNoteIsActive)[Key] );
    }

    uint8_t VirtualMidiDevice::NoteOnVelocity(uint8_t Key) {
        return atomic_read( &(p->pNoteOnVelocity)[Key] );
    }

    uint8_t VirtualMidiDevice::NoteOffVelocity(uint8_t Key) {
        return atomic_read( &(p->pNoteOffVelocity)[Key] );
    }
    
    uint8_t VirtualMidiDevice::ControllerValue(uint8_t Controller) {
        return atomic_read( &(p->pCCValue)[Controller] );
    }

    void VirtualMidiDevice::SendNoteOnToDevice(uint8_t Key, uint8_t Velocity) {
        if (Key >= MIDI_KEYS) return;
        atomic_set( &(p->pNoteOnVelocity)[Key], Velocity );
        atomic_inc( &(p->pNoteIsActive)[Key] );
        atomic_inc( &(p->pNoteChanged)[Key] );
        atomic_inc( &p->notesChanged );
    }

    void VirtualMidiDevice::SendNoteOffToDevice(uint8_t Key, uint8_t Velocity) {
        if (Key >= MIDI_KEYS) return;
        atomic_set( &(p->pNoteOffVelocity)[Key], Velocity );
        if (atomic_read( &(p->pNoteIsActive)[Key] )) // only decrement if not zero
            atomic_dec( &(p->pNoteIsActive)[Key] );
        atomic_inc( &(p->pNoteChanged)[Key] );
        atomic_inc( &p->notesChanged );
    }
    
    void VirtualMidiDevice::SendCCToDevice(uint8_t Controller, uint8_t Value) {
        if (Controller >= MIDI_CONTROLLERS) return;
        atomic_set( &(p->pCCValue)[Controller], Value );
        atomic_inc( &(p->pCCChanged)[Controller] );
        atomic_inc( &p->ccsChanged );
    }

} // namespace LinuxSampler
1	/*
2	Copyright (C) 2008 - 2012 Christian Schoenebeck
3	*/
4
5	#include "VirtualMidiDevice.h"
6
7	#include "../../common/global_private.h"
8	#include "../../common/atomic.h"
9	#include "../../common/RingBuffer.h"
10
11	#define MIDI_KEYS 128
12	#define MIDI_CONTROLLERS 128
13
14	// assuming VirtualMidiDevice implementation is only controlled
15	// by mouse (and the user not being Billy the Kid)
16	#define MAX_EVENTS 12
17
18	namespace LinuxSampler {
19
20	struct VirtualMidiDevice::private_data_t {
21	atomic_t notesChanged; // whether some key changed at all
22	atomic_t pNoteChanged[MIDI_KEYS]; // which key(s) changed
23	atomic_t pNoteIsActive[MIDI_KEYS]; // status of each key (either active or inactive)
24	atomic_t pNoteOnVelocity[MIDI_KEYS];
25	atomic_t pNoteOffVelocity[MIDI_KEYS];
26	atomic_t ccsChanged; // whether some controller changed at all
27	atomic_t pCCChanged[MIDI_CONTROLLERS]; // which controller(s) changed
28	atomic_t pCCValue[MIDI_CONTROLLERS]; // current value of each controller
29	RingBuffer<VirtualMidiDevice::event_t,false> events;
30
31	private_data_t() : events(MAX_EVENTS, 0) {}
32	};
33
34	VirtualMidiDevice::VirtualMidiDevice() : p(new private_data_t) {
35	atomic_t zero = ATOMIC_INIT(0);
36	atomic_t defaultVelocity = ATOMIC_INIT(127);
37	atomic_t defaultCCValue = ATOMIC_INIT(0);
38	p->notesChanged = zero;
39	p->ccsChanged = zero;
40	for (int i = 0; i < MIDI_KEYS; i++) {
41	p->pNoteChanged[i] = zero;
42	p->pNoteIsActive[i] = zero;
43	p->pNoteOnVelocity[i] = defaultVelocity;
44	p->pNoteOffVelocity[i] = defaultVelocity;
45	p->pCCChanged[i] = zero;
46	p->pCCValue[i] = defaultCCValue;
47	}
48	}
49
50	VirtualMidiDevice::~VirtualMidiDevice() {
51	delete p;
52	}
53
54	void VirtualMidiDevice::SetMaxEvents(int n) {
55	p->events.resize(n);
56	}
57
58	bool VirtualMidiDevice::SendNoteOnToSampler(uint8_t Key, uint8_t Velocity) {
59	if (Key >= MIDI_KEYS \|\| Velocity > 127) return false;
60	event_t ev = { EVENT_TYPE_NOTEON, Key, Velocity };
61	if (p->events.write_space() <= 0) return false;
62	p->events.push(&ev);
63	return true;
64	}
65
66	bool VirtualMidiDevice::SendNoteOffToSampler(uint8_t Key, uint8_t Velocity) {
67	if (Key >= MIDI_KEYS \|\| Velocity > 127) return false;
68	event_t ev = { EVENT_TYPE_NOTEOFF, Key, Velocity };
69	if (p->events.write_space() <= 0) return false;
70	p->events.push(&ev);
71	return true;
72	}
73
74	bool VirtualMidiDevice::SendCCToSampler(uint8_t Controller, uint8_t Value) {
75	if (Controller >= MIDI_CONTROLLERS \|\| Value > 127) return false;
76	event_t ev = { EVENT_TYPE_CC, Controller, Value };
77	if (p->events.write_space() <= 0) return false;
78	p->events.push(&ev);
79	return true;
80	}
81
82	bool VirtualMidiDevice::GetMidiEventFromDevice(event_t& Event) {
83	return (p->events.pop(&Event) > 0);
84	}
85
86	bool VirtualMidiDevice::NotesChanged() {
87	int c = atomic_read( &p->notesChanged );
88	atomic_sub(c, &p->notesChanged );
89	return c;
90	}
91
92	bool VirtualMidiDevice::ControllersChanged() {
93	int c = atomic_read( &p->ccsChanged );
94	atomic_sub(c, &p->ccsChanged );
95	return c;
96	}
97
98	bool VirtualMidiDevice::NoteChanged(uint8_t Key) {
99	int c = atomic_read( &(p->pNoteChanged)[Key] );
100	atomic_sub(c, &(p->pNoteChanged)[Key] );
101	return c;
102	}
103
104	bool VirtualMidiDevice::ControllerChanged(uint8_t Controller) {
105	int c = atomic_read( &(p->pCCChanged)[Controller] );
106	atomic_sub(c, &(p->pCCChanged)[Controller] );
107	return c;
108	}
109
110	bool VirtualMidiDevice::NoteIsActive(uint8_t Key) {
111	return atomic_read( &(p->pNoteIsActive)[Key] );
112	}
113
114	uint8_t VirtualMidiDevice::NoteOnVelocity(uint8_t Key) {
115	return atomic_read( &(p->pNoteOnVelocity)[Key] );
116	}
117
118	uint8_t VirtualMidiDevice::NoteOffVelocity(uint8_t Key) {
119	return atomic_read( &(p->pNoteOffVelocity)[Key] );
120	}
121
122	uint8_t VirtualMidiDevice::ControllerValue(uint8_t Controller) {
123	return atomic_read( &(p->pCCValue)[Controller] );
124	}
125
126	void VirtualMidiDevice::SendNoteOnToDevice(uint8_t Key, uint8_t Velocity) {
127	if (Key >= MIDI_KEYS) return;
128	atomic_set( &(p->pNoteOnVelocity)[Key], Velocity );
129	atomic_inc( &(p->pNoteIsActive)[Key] );
130	atomic_inc( &(p->pNoteChanged)[Key] );
131	atomic_inc( &p->notesChanged );
132	}
133
134	void VirtualMidiDevice::SendNoteOffToDevice(uint8_t Key, uint8_t Velocity) {
135	if (Key >= MIDI_KEYS) return;
136	atomic_set( &(p->pNoteOffVelocity)[Key], Velocity );
137	if (atomic_read( &(p->pNoteIsActive)[Key] )) // only decrement if not zero
138	atomic_dec( &(p->pNoteIsActive)[Key] );
139	atomic_inc( &(p->pNoteChanged)[Key] );
140	atomic_inc( &p->notesChanged );
141	}
142
143	void VirtualMidiDevice::SendCCToDevice(uint8_t Controller, uint8_t Value) {
144	if (Controller >= MIDI_CONTROLLERS) return;
145	atomic_set( &(p->pCCValue)[Controller], Value );
146	atomic_inc( &(p->pCCChanged)[Controller] );
147	atomic_inc( &p->ccsChanged );
148	}
149
150	} // namespace LinuxSampler