/[svn]/linuxsampler/trunk/src/drivers/midi/VirtualMidiDevice.cpp
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Annotation of /linuxsampler/trunk/src/drivers/midi/VirtualMidiDevice.cpp

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Revision 2385 - (hide annotations) (download)
Fri Dec 14 17:41:32 2012 UTC (7 years, 11 months ago) by schoenebeck
File size: 5475 byte(s)
* Bugfix in VirtualMidiDevice: process note on with velocity 0 as note off.

1 schoenebeck 1659 /*
2 schoenebeck 2384 Copyright (C) 2008 - 2012 Christian Schoenebeck
3 schoenebeck 1659 */
4    
5     #include "VirtualMidiDevice.h"
6    
7     #include "../../common/global_private.h"
8     #include "../../common/atomic.h"
9     #include "../../common/RingBuffer.h"
10    
11 schoenebeck 2025 #define MIDI_KEYS 128
12     #define MIDI_CONTROLLERS 128
13 schoenebeck 1659
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 persson 1896 struct VirtualMidiDevice::private_data_t {
21 schoenebeck 1659 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 schoenebeck 1663 atomic_t pNoteOnVelocity[MIDI_KEYS];
25     atomic_t pNoteOffVelocity[MIDI_KEYS];
26 schoenebeck 2025 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 schoenebeck 1659 RingBuffer<VirtualMidiDevice::event_t,false> events;
30    
31 persson 1896 private_data_t() : events(MAX_EVENTS, 0) {}
32 schoenebeck 1659 };
33    
34 persson 1896 VirtualMidiDevice::VirtualMidiDevice() : p(new private_data_t) {
35 schoenebeck 1659 atomic_t zero = ATOMIC_INIT(0);
36 schoenebeck 1663 atomic_t defaultVelocity = ATOMIC_INIT(127);
37 schoenebeck 2025 atomic_t defaultCCValue = ATOMIC_INIT(0);
38 schoenebeck 1659 p->notesChanged = zero;
39 schoenebeck 2025 p->ccsChanged = zero;
40 schoenebeck 1659 for (int i = 0; i < MIDI_KEYS; i++) {
41     p->pNoteChanged[i] = zero;
42     p->pNoteIsActive[i] = zero;
43 schoenebeck 1663 p->pNoteOnVelocity[i] = defaultVelocity;
44     p->pNoteOffVelocity[i] = defaultVelocity;
45 schoenebeck 2025 p->pCCChanged[i] = zero;
46     p->pCCValue[i] = defaultCCValue;
47 schoenebeck 1659 }
48     }
49    
50     VirtualMidiDevice::~VirtualMidiDevice() {
51 persson 1896 delete p;
52 schoenebeck 1659 }
53 schoenebeck 2384
54     void VirtualMidiDevice::SetMaxEvents(int n) {
55     p->events.resize(n);
56     }
57 schoenebeck 1659
58     bool VirtualMidiDevice::SendNoteOnToSampler(uint8_t Key, uint8_t Velocity) {
59     if (Key >= MIDI_KEYS || Velocity > 127) return false;
60 schoenebeck 2385 if (Velocity == 0) {
61     return SendNoteOffToSampler(Key, Velocity);
62     }
63 schoenebeck 1659 event_t ev = { EVENT_TYPE_NOTEON, Key, Velocity };
64     if (p->events.write_space() <= 0) return false;
65     p->events.push(&ev);
66     return true;
67     }
68    
69     bool VirtualMidiDevice::SendNoteOffToSampler(uint8_t Key, uint8_t Velocity) {
70     if (Key >= MIDI_KEYS || Velocity > 127) return false;
71     event_t ev = { EVENT_TYPE_NOTEOFF, Key, Velocity };
72     if (p->events.write_space() <= 0) return false;
73     p->events.push(&ev);
74     return true;
75     }
76 schoenebeck 2025
77     bool VirtualMidiDevice::SendCCToSampler(uint8_t Controller, uint8_t Value) {
78     if (Controller >= MIDI_CONTROLLERS || Value > 127) return false;
79     event_t ev = { EVENT_TYPE_CC, Controller, Value };
80     if (p->events.write_space() <= 0) return false;
81     p->events.push(&ev);
82     return true;
83     }
84 schoenebeck 1659
85     bool VirtualMidiDevice::GetMidiEventFromDevice(event_t& Event) {
86     return (p->events.pop(&Event) > 0);
87     }
88    
89     bool VirtualMidiDevice::NotesChanged() {
90     int c = atomic_read( &p->notesChanged );
91     atomic_sub(c, &p->notesChanged );
92     return c;
93     }
94 schoenebeck 2025
95     bool VirtualMidiDevice::ControllersChanged() {
96     int c = atomic_read( &p->ccsChanged );
97     atomic_sub(c, &p->ccsChanged );
98     return c;
99     }
100 schoenebeck 1659
101     bool VirtualMidiDevice::NoteChanged(uint8_t Key) {
102     int c = atomic_read( &(p->pNoteChanged)[Key] );
103     atomic_sub(c, &(p->pNoteChanged)[Key] );
104     return c;
105     }
106 schoenebeck 2025
107     bool VirtualMidiDevice::ControllerChanged(uint8_t Controller) {
108     int c = atomic_read( &(p->pCCChanged)[Controller] );
109     atomic_sub(c, &(p->pCCChanged)[Controller] );
110     return c;
111     }
112 schoenebeck 1659
113     bool VirtualMidiDevice::NoteIsActive(uint8_t Key) {
114     return atomic_read( &(p->pNoteIsActive)[Key] );
115     }
116    
117 schoenebeck 1663 uint8_t VirtualMidiDevice::NoteOnVelocity(uint8_t Key) {
118     return atomic_read( &(p->pNoteOnVelocity)[Key] );
119     }
120    
121     uint8_t VirtualMidiDevice::NoteOffVelocity(uint8_t Key) {
122     return atomic_read( &(p->pNoteOffVelocity)[Key] );
123     }
124 schoenebeck 2025
125     uint8_t VirtualMidiDevice::ControllerValue(uint8_t Controller) {
126     return atomic_read( &(p->pCCValue)[Controller] );
127     }
128 schoenebeck 1663
129     void VirtualMidiDevice::SendNoteOnToDevice(uint8_t Key, uint8_t Velocity) {
130 schoenebeck 1659 if (Key >= MIDI_KEYS) return;
131 schoenebeck 2385 if (Velocity == 0) {
132     SendNoteOffToDevice(Key, Velocity);
133     return;
134     }
135 schoenebeck 1663 atomic_set( &(p->pNoteOnVelocity)[Key], Velocity );
136 schoenebeck 1659 atomic_inc( &(p->pNoteIsActive)[Key] );
137     atomic_inc( &(p->pNoteChanged)[Key] );
138     atomic_inc( &p->notesChanged );
139     }
140    
141 schoenebeck 1663 void VirtualMidiDevice::SendNoteOffToDevice(uint8_t Key, uint8_t Velocity) {
142 schoenebeck 1659 if (Key >= MIDI_KEYS) return;
143 schoenebeck 1663 atomic_set( &(p->pNoteOffVelocity)[Key], Velocity );
144 schoenebeck 2384 if (atomic_read( &(p->pNoteIsActive)[Key] )) // only decrement if not zero
145     atomic_dec( &(p->pNoteIsActive)[Key] );
146 schoenebeck 1659 atomic_inc( &(p->pNoteChanged)[Key] );
147     atomic_inc( &p->notesChanged );
148     }
149 schoenebeck 2025
150     void VirtualMidiDevice::SendCCToDevice(uint8_t Controller, uint8_t Value) {
151     if (Controller >= MIDI_CONTROLLERS) return;
152     atomic_set( &(p->pCCValue)[Controller], Value );
153     atomic_inc( &(p->pCCChanged)[Controller] );
154     atomic_inc( &p->ccsChanged );
155     }
156 schoenebeck 1659
157     } // namespace LinuxSampler

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