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-rw-r--r--src/engine/InternalNote.cpp390
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diff --git a/src/engine/InternalNote.cpp b/src/engine/InternalNote.cpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ *
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Ingen 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 General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "raul/Array.hpp"
+#include "raul/Maid.hpp"
+#include "raul/midi_events.h"
+#include <cmath>
+#include <iostream>
+#include "AudioBuffer.hpp"
+#include "AudioDriver.hpp"
+#include "InputPort.hpp"
+#include "InternalPlugin.hpp"
+#include "EventBuffer.hpp"
+#include "InternalNote.hpp"
+#include "OutputPort.hpp"
+#include "PatchImpl.hpp"
+#include "ProcessContext.hpp"
+#include "util.hpp"
+
+using namespace std;
+
+namespace Ingen {
+
+static InternalPlugin note_plugin(NS_INTERNALS "Note", "note", "Note");
+
+NoteNode::NoteNode(const string& path, bool polyphonic, PatchImpl* parent, SampleRate srate, size_t buffer_size)
+ : NodeBase(&note_plugin, path, polyphonic, parent, srate, buffer_size)
+ , _voices(new Raul::Array<Voice>(_polyphony))
+ , _prepared_voices(NULL)
+ , _sustain(false)
+{
+ _ports = new Raul::Array<PortImpl*>(5);
+
+ _midi_in_port = new InputPort(this, "input", 0, 1, DataType::EVENT, Atom(), _buffer_size);
+ _ports->at(0) = _midi_in_port;
+
+ _freq_port = new OutputPort(this, "frequency", 1, _polyphony, DataType::AUDIO, 440.0f, _buffer_size);
+ _ports->at(1) = _freq_port;
+
+ _vel_port = new OutputPort(this, "velocity", 2, _polyphony, DataType::AUDIO, 0.0f, _buffer_size);
+ _vel_port->set_variable("lv2:minimum", 0.0f);
+ _vel_port->set_variable("lv2:maximum", 1.0f);
+ _ports->at(2) = _vel_port;
+
+ _gate_port = new OutputPort(this, "gate", 3, _polyphony, DataType::AUDIO, 0.0f, _buffer_size);
+ _gate_port->set_variable("lv2:toggled", true);
+ _ports->at(3) = _gate_port;
+
+ _trig_port = new OutputPort(this, "trigger", 4, _polyphony, DataType::AUDIO, 0.0f, _buffer_size);
+ _trig_port->set_variable("lv2:toggled", true);
+ _ports->at(4) = _trig_port;
+}
+
+
+NoteNode::~NoteNode()
+{
+ delete _voices;
+}
+
+
+bool
+NoteNode::prepare_poly(uint32_t poly)
+{
+ if (!_polyphonic)
+ return true;
+
+ NodeBase::prepare_poly(poly);
+
+ if (_prepared_voices && poly <= _prepared_voices->size())
+ return true;
+
+ _prepared_voices = new Raul::Array<Voice>(poly, *_voices);
+
+ return true;
+}
+
+
+bool
+NoteNode::apply_poly(Raul::Maid& maid, uint32_t poly)
+{
+ if (!_polyphonic)
+ return true;
+
+ NodeBase::apply_poly(maid, poly);
+
+ if (_prepared_voices) {
+ assert(poly <= _prepared_voices->size());
+ maid.push(_voices);
+ _voices = _prepared_voices;
+ _prepared_voices = NULL;
+ }
+
+ _polyphony = poly;
+ assert(_voices->size() >= _polyphony);
+
+ return true;
+}
+
+
+void
+NoteNode::process(ProcessContext& context)
+{
+ NodeBase::pre_process(context);
+
+ uint32_t frames = 0;
+ uint32_t subframes = 0;
+ uint16_t type = 0;
+ uint16_t size = 0;
+ unsigned char* buf = NULL;
+
+ EventBuffer* const midi_in = (EventBuffer*)_midi_in_port->buffer(0);
+ assert(midi_in->this_nframes() == context.nframes());
+
+ //cerr << path() << " # input events: " << midi_in->event_count() << endl;
+
+ if (midi_in->event_count() > 0)
+ while (midi_in->get_event(&frames, &subframes, &type, &size, &buf)) {
+
+ /*cout << "EVENT TYPE " << type << " @ " << frames << "." << subframes << ": ";
+ for (uint16_t i = 0; i < size; ++i)
+ cout << (int)((char)buf[i]) << " ";
+ cout << endl;*/
+
+ const FrameTime time = context.start() + (FrameTime)frames;
+
+ if (size >= 3) {
+ switch (buf[0] & 0xF0) {
+ case MIDI_CMD_NOTE_ON:
+ if (buf[2] == 0)
+ note_off(context, buf[1], time);
+ else
+ note_on(context, buf[1], buf[2], time);
+ break;
+ case MIDI_CMD_NOTE_OFF:
+ note_off(context, buf[1], time);
+ break;
+ case MIDI_CMD_CONTROL:
+ switch (buf[1]) {
+ case MIDI_CTL_ALL_NOTES_OFF:
+ case MIDI_CTL_ALL_SOUNDS_OFF:
+ all_notes_off(context, time);
+ break;
+ case MIDI_CTL_SUSTAIN:
+ if (buf[2] > 63)
+ sustain_on(context, time);
+ else
+ sustain_off(context, time);
+ break;
+ case MIDI_CMD_BENDER:
+ // ?
+ break;
+ default:
+ //cerr << "Ignored controller " << buf[1] << endl;
+ break;
+ }
+ break;
+ default:
+ //fprintf(stderr, "Unknown (size %d) MIDI event %X\n", size, buf[0]);
+ break;
+ }
+ } else {
+ //fprintf(stderr, "Unknown (size %d) MIDI event %X\n", size, buf[0]);
+ }
+
+ if (midi_in->increment() == midi_in->this_nframes())
+ break;
+ }
+
+ NodeBase::post_process(context);
+}
+
+
+void
+NoteNode::note_on(ProcessContext& context, uchar note_num, uchar velocity, FrameTime time)
+{
+ assert(time >= context.start() && time <= context.end());
+ assert(time - context.start() < _buffer_size);
+ assert(note_num <= 127);
+
+ Key* key = &_keys[note_num];
+ Voice* voice = NULL;
+ uint32_t voice_num = 0;
+
+ if (key->state != Key::OFF) {
+ //cerr << "[NoteNode] Double midi note received" << endl;
+ return;
+ }
+
+ // Look for free voices
+ for (uint32_t i=0; i < _polyphony; ++i) {
+ if ((*_voices)[i].state == Voice::Voice::FREE) {
+ voice = &(*_voices)[i];
+ voice_num = i;
+ break;
+ }
+ }
+
+ // If we didn't find a free one, steal the oldest
+ if (voice == NULL) {
+ voice_num = 0;
+ voice = &(*_voices)[0];
+ FrameTime oldest_time = (*_voices)[0].time;
+ for (uint32_t i=1; i < _polyphony; ++i) {
+ if ((*_voices)[i].time < oldest_time) {
+ voice = &(*_voices)[i];
+ voice_num = i;
+ oldest_time = voice->time;
+ }
+ }
+ }
+ assert(voice != NULL);
+ assert(voice == &(*_voices)[voice_num]);
+
+ /*cerr << "[NoteNode] Note " << (int)note_num << " on @ " << time
+ << ". Voice " << voice_num << " / " << _polyphony << endl;*/
+
+ // Update stolen key, if applicable
+ if (voice->state == Voice::Voice::ACTIVE) {
+ assert(_keys[voice->note].state == Key::ON_ASSIGNED);
+ assert(_keys[voice->note].voice == voice_num);
+ _keys[voice->note].state = Key::Key::ON_UNASSIGNED;
+ //cerr << "[NoteNode] Stole voice " << voice_num << endl;
+ }
+
+ // Store key information for later reallocation on note off
+ key->state = Key::Key::ON_ASSIGNED;
+ key->voice = voice_num;
+ key->time = time;
+
+ // Trigger voice
+ voice->state = Voice::Voice::ACTIVE;
+ voice->note = note_num;
+ voice->time = time;
+
+ assert(_keys[voice->note].state == Key::Key::ON_ASSIGNED);
+ assert(_keys[voice->note].voice == voice_num);
+
+ ((AudioBuffer*)_freq_port->buffer(voice_num))->set_value(note_to_freq(note_num), context.start(), time);
+ ((AudioBuffer*)_vel_port->buffer(voice_num))->set_value(velocity/127.0, context.start(), time);
+ ((AudioBuffer*)_gate_port->buffer(voice_num))->set_value(1.0f, context.start(), time);
+
+ // trigger (one sample)
+ ((AudioBuffer*)_trig_port->buffer(voice_num))->set_value(1.0f, context.start(), time);
+ ((AudioBuffer*)_trig_port->buffer(voice_num))->set_value(0.0f, context.start(), time + 1);
+
+ assert(key->state == Key::Key::ON_ASSIGNED);
+ assert(voice->state == Voice::Voice::ACTIVE);
+ assert(key->voice == voice_num);
+ assert((*_voices)[key->voice].note == note_num);
+}
+
+
+void
+NoteNode::note_off(ProcessContext& context, uchar note_num, FrameTime time)
+{
+ assert(time >= context.start() && time <= context.end());
+ assert(time - context.start() < _buffer_size);
+
+ Key* key = &_keys[note_num];
+
+ //cerr << "[NoteNode] Note " << (int)note_num << " off @ " << time << endl;
+
+ if (key->state == Key::ON_ASSIGNED) {
+ // Assigned key, turn off voice and key
+ if ((*_voices)[key->voice].state == Voice::ACTIVE) {
+ assert((*_voices)[key->voice].note == note_num);
+
+ if ( ! _sustain) {
+ //cerr << "... free voice " << key->voice << endl;
+ free_voice(context, key->voice, time);
+ } else {
+ //cerr << "... hold voice " << key->voice << endl;
+ (*_voices)[key->voice].state = Voice::HOLDING;
+ }
+
+ } else {
+#ifndef NDEBUG
+ cerr << "WARNING: Assigned key, but voice not active" << endl;
+#endif
+ }
+ }
+
+ key->state = Key::OFF;
+}
+
+
+void
+NoteNode::free_voice(ProcessContext& context, uint32_t voice, FrameTime time)
+{
+ assert(time >= context.start() && time <= context.end());
+ assert(time - context.start() < _buffer_size);
+
+ // Find a key to reassign to the freed voice (the newest, if there is one)
+ Key* replace_key = NULL;
+ uchar replace_key_num = 0;
+
+ for (uchar i = 0; i <= 127; ++i) {
+ if (_keys[i].state == Key::ON_UNASSIGNED) {
+ if (replace_key == NULL || _keys[i].time > replace_key->time) {
+ replace_key = &_keys[i];
+ replace_key_num = i;
+ }
+ }
+ }
+
+ if (replace_key != NULL) { // Found a key to assign to freed voice
+ assert(&_keys[replace_key_num] == replace_key);
+ assert(replace_key->state == Key::ON_UNASSIGNED);
+
+ // Change the freq but leave the gate high and don't retrigger
+ ((AudioBuffer*)_freq_port->buffer(voice))->set_value(note_to_freq(replace_key_num), context.start(), time);
+
+ replace_key->state = Key::ON_ASSIGNED;
+ replace_key->voice = voice;
+ _keys[(*_voices)[voice].note].state = Key::ON_UNASSIGNED;
+ (*_voices)[voice].note = replace_key_num;
+ (*_voices)[voice].state = Voice::ACTIVE;
+ } else {
+ // No new note for voice, deactivate (set gate low)
+ //cerr << "[NoteNode] Note off. Key " << (int)note_num << ", Voice " << voice << " Killed" << endl;
+ ((AudioBuffer*)_gate_port->buffer(voice))->set_value(0.0f, context.start(), time);
+ (*_voices)[voice].state = Voice::FREE;
+ }
+}
+
+
+void
+NoteNode::all_notes_off(ProcessContext& context, FrameTime time)
+{
+ assert(time >= context.start() && time <= context.end());
+ assert(time - context.start() < _buffer_size);
+
+ //cerr << "All notes off @ " << offset << endl;
+
+ // FIXME: set all keys to Key::OFF?
+
+ for (uint32_t i = 0; i < _polyphony; ++i) {
+ ((AudioBuffer*)_gate_port->buffer(i))->set_value(0.0f, context.start(), time);
+ (*_voices)[i].state = Voice::FREE;
+ }
+}
+
+
+float
+NoteNode::note_to_freq(int num)
+{
+ static const float A4 = 440.0f;
+ if (num >= 0 && num <= 119)
+ return A4 * powf(2.0f, (float)(num - 57.0f) / 12.0f);
+ return 1.0f; // Some LADSPA plugins don't like freq=0
+}
+
+
+void
+NoteNode::sustain_on(ProcessContext& context, FrameTime time)
+{
+ _sustain = true;
+}
+
+
+void
+NoteNode::sustain_off(ProcessContext& context, FrameTime time)
+{
+ assert(time >= context.start() && time <= context.end());
+ assert(time - context.start() < _buffer_size);
+
+ _sustain = false;
+
+ for (uint32_t i=0; i < _polyphony; ++i)
+ if ((*_voices)[i].state == Voice::HOLDING)
+ free_voice(context, i, time);
+}
+
+
+} // namespace Ingen
+
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