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/* |
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Copyright (C) 2008 Christian Schoenebeck |
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*/ |
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#include "VirtualMidiDevice.h" |
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|
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#include "../../common/global_private.h" |
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#include "../../common/atomic.h" |
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#include "../../common/RingBuffer.h" |
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|
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#define MIDI_KEYS 128 |
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|
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// assuming VirtualMidiDevice implementation is only controlled |
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// by mouse (and the user not being Billy the Kid) |
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#define MAX_EVENTS 12 |
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|
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namespace LinuxSampler { |
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|
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struct VirtualMidiDevice::private_data_t { |
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atomic_t notesChanged; // whether some key changed at all |
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atomic_t pNoteChanged[MIDI_KEYS]; // which key(s) changed |
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atomic_t pNoteIsActive[MIDI_KEYS]; // status of each key (either active or inactive) |
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atomic_t pNoteOnVelocity[MIDI_KEYS]; |
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atomic_t pNoteOffVelocity[MIDI_KEYS]; |
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RingBuffer<VirtualMidiDevice::event_t,false> events; |
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|
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private_data_t() : events(MAX_EVENTS, 0) {} |
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}; |
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|
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VirtualMidiDevice::VirtualMidiDevice() : p(new private_data_t) { |
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atomic_t zero = ATOMIC_INIT(0); |
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atomic_t defaultVelocity = ATOMIC_INIT(127); |
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p->notesChanged = zero; |
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for (int i = 0; i < MIDI_KEYS; i++) { |
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p->pNoteChanged[i] = zero; |
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p->pNoteIsActive[i] = zero; |
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p->pNoteOnVelocity[i] = defaultVelocity; |
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p->pNoteOffVelocity[i] = defaultVelocity; |
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} |
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} |
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|
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VirtualMidiDevice::~VirtualMidiDevice() { |
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delete p; |
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} |
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|
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bool VirtualMidiDevice::SendNoteOnToSampler(uint8_t Key, uint8_t Velocity) { |
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if (Key >= MIDI_KEYS || Velocity > 127) return false; |
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event_t ev = { EVENT_TYPE_NOTEON, Key, Velocity }; |
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if (p->events.write_space() <= 0) return false; |
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p->events.push(&ev); |
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return true; |
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} |
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|
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bool VirtualMidiDevice::SendNoteOffToSampler(uint8_t Key, uint8_t Velocity) { |
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if (Key >= MIDI_KEYS || Velocity > 127) return false; |
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event_t ev = { EVENT_TYPE_NOTEOFF, Key, Velocity }; |
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if (p->events.write_space() <= 0) return false; |
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p->events.push(&ev); |
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return true; |
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} |
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|
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bool VirtualMidiDevice::GetMidiEventFromDevice(event_t& Event) { |
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return (p->events.pop(&Event) > 0); |
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} |
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|
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bool VirtualMidiDevice::NotesChanged() { |
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int c = atomic_read( &p->notesChanged ); |
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atomic_sub(c, &p->notesChanged ); |
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return c; |
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} |
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|
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bool VirtualMidiDevice::NoteChanged(uint8_t Key) { |
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int c = atomic_read( &(p->pNoteChanged)[Key] ); |
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atomic_sub(c, &(p->pNoteChanged)[Key] ); |
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return c; |
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} |
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|
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bool VirtualMidiDevice::NoteIsActive(uint8_t Key) { |
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return atomic_read( &(p->pNoteIsActive)[Key] ); |
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} |
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|
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uint8_t VirtualMidiDevice::NoteOnVelocity(uint8_t Key) { |
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return atomic_read( &(p->pNoteOnVelocity)[Key] ); |
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} |
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|
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uint8_t VirtualMidiDevice::NoteOffVelocity(uint8_t Key) { |
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return atomic_read( &(p->pNoteOffVelocity)[Key] ); |
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} |
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|
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void VirtualMidiDevice::SendNoteOnToDevice(uint8_t Key, uint8_t Velocity) { |
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if (Key >= MIDI_KEYS) return; |
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atomic_set( &(p->pNoteOnVelocity)[Key], Velocity ); |
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atomic_inc( &(p->pNoteIsActive)[Key] ); |
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atomic_inc( &(p->pNoteChanged)[Key] ); |
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atomic_inc( &p->notesChanged ); |
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} |
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|
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void VirtualMidiDevice::SendNoteOffToDevice(uint8_t Key, uint8_t Velocity) { |
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if (Key >= MIDI_KEYS) return; |
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atomic_set( &(p->pNoteOffVelocity)[Key], Velocity ); |
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atomic_dec( &(p->pNoteIsActive)[Key] ); |
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atomic_inc( &(p->pNoteChanged)[Key] ); |
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atomic_inc( &p->notesChanged ); |
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} |
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|
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} // namespace LinuxSampler |
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