/* This file is part of Machina. * Copyright 2007-2011 David Robillard * * Machina 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 3 of the License, or * (at your option) any later version. * * Machina 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 more details. * * You should have received a copy of the GNU General Public License * along with Machina. If not, see . */ #include "lv2/lv2plug.in/ns/ext/midi/midi.h" #include "machina/Machine.hpp" #include "machina/types.hpp" #include "Edge.hpp" #include "MachineBuilder.hpp" #include "MidiAction.hpp" #include "Node.hpp" #include "quantize.hpp" using namespace std; using namespace Raul; namespace machina { MachineBuilder::MachineBuilder(SPtr machine, double q, bool step) : _quantization(q) , _time(machine->time().unit()) // = 0 , _machine(machine) , _initial_node(machine->initial_node()) // duration 0 , _connect_node(_initial_node) , _connect_node_end_time(_time) // = 0 , _step(step) {} void MachineBuilder::reset() { _time = TimeStamp(_machine->time().unit()); // = 0 _connect_node = _initial_node; _connect_node_end_time = _time; // = 0 } bool MachineBuilder::is_delay_node(SPtr node) const { return !node->enter_action() && !node->exit_action(); } /** Set the duration of a node, with quantization. */ void MachineBuilder::set_node_duration(SPtr node, Raul::TimeDuration d) const { if (_step) { node->set_duration(TimeStamp(d.unit(), 1, 0)); return; } Raul::TimeStamp q_dur = quantize(TimeStamp(d.unit(), _quantization), d); // Never quantize a note to duration 0 if (q_dur.is_zero() && (node->enter_action() || node->exit_action())) { q_dur = _quantization; // Round up } node->set_duration(q_dur); } /** Connect two nodes, inserting a delay node between them if necessary. * * If a delay node is added to the machine, it is returned. */ SPtr MachineBuilder::connect_nodes(SPtr m, SPtr tail, Raul::TimeStamp tail_end_time, SPtr head, Raul::TimeStamp head_start_time) { assert(tail != head); assert(head_start_time >= tail_end_time); SPtr delay_node; if (is_delay_node(tail) && tail->edges().empty()) { // Tail is a delay node, just accumulate the time difference into it set_node_duration(tail, tail->duration() + head_start_time - tail_end_time); tail->add_edge(SPtr(new Edge(tail, head))); } else if (_step || (head_start_time == tail_end_time)) { // Connect directly tail->add_edge(SPtr(new Edge(tail, head))); } else { // Need to actually create a delay node delay_node = SPtr(new Node(head_start_time - tail_end_time)); tail->add_edge(SPtr(new Edge(tail, delay_node))); delay_node->add_edge(SPtr(new Edge(delay_node, head))); m->add_node(delay_node); } return delay_node; } void MachineBuilder::note_on(Raul::TimeStamp t, size_t ev_size, uint8_t* buf) { SPtr node(new Node(TimeStamp(t.unit()))); node->set_enter_action(SPtr(new MidiAction(ev_size, buf))); SPtr this_connect_node; Raul::TimeStamp this_connect_node_end_time(t.unit()); /* If currently polyphonic, use a poly node with no successors as connect node, for more sensible patterns like what a human would build. */ if (!_poly_nodes.empty()) { for (PolyList::iterator j = _poly_nodes.begin(); j != _poly_nodes.end(); ++j) { if (j->second->edges().empty()) { this_connect_node = j->second; this_connect_node_end_time = j->first + j->second->duration(); break; } } } /* Currently monophonic, or didn't find a poly node, so use _connect_node which is maintained below on note off events. */ if (!this_connect_node) { this_connect_node = _connect_node; this_connect_node_end_time = _connect_node_end_time; } SPtr delay_node = connect_nodes( _machine, this_connect_node, this_connect_node_end_time, node, t); if (delay_node) { _connect_node = delay_node; _connect_node_end_time = t; } node->enter(NULL, t); _active_nodes.push_back(node); } void MachineBuilder::resolve_note(Raul::TimeStamp t, size_t ev_size, uint8_t* buf, SPtr resolved) { resolved->set_exit_action( SPtr(new MidiAction(ev_size, buf))); set_node_duration(resolved, t - resolved->enter_time()); if (_active_nodes.size() == 1) { // Last active note _connect_node_end_time = t; if (!_poly_nodes.empty()) { // Finish a polyphonic section _connect_node = SPtr(new Node(TimeStamp(t.unit()))); _machine->add_node(_connect_node); connect_nodes(_machine, resolved, t, _connect_node, t); for (PolyList::iterator j = _poly_nodes.begin(); j != _poly_nodes.end(); ++j) { _machine->add_node(j->second); if (j->second->edges().empty()) { connect_nodes(_machine, j->second, j->first + j->second->duration(), _connect_node, t); } } _poly_nodes.clear(); _machine->add_node(resolved); } else { // Just monophonic if (is_delay_node(_connect_node) && _connect_node->duration().is_zero() && (_connect_node->edges().size() == 1) && ((*_connect_node->edges().begin())->head() == resolved)) { // Trim useless delay node if possible (after poly sections) _connect_node->edges().clear(); assert(_connect_node->edges().empty()); _connect_node->set_enter_action(resolved->enter_action()); _connect_node->set_exit_action(resolved->exit_action()); resolved->set_enter_action(SPtr()); resolved->set_exit_action(SPtr()); set_node_duration(_connect_node, resolved->duration()); resolved = _connect_node; _machine->add_node(_connect_node); } else { _connect_node = resolved; _machine->add_node(resolved); } } } else { // Polyphonic, add this state to poly list _poly_nodes.push_back(make_pair(resolved->enter_time(), resolved)); _connect_node = resolved; _connect_node_end_time = t; } if (resolved->is_active()) { resolved->exit(NULL, t); } } void MachineBuilder::event(Raul::TimeStamp time_offset, size_t ev_size, uint8_t* buf) { Raul::TimeStamp t = _time + time_offset; if (ev_size == 0) { return; } if ((buf[0] & 0xF0) == LV2_MIDI_MSG_NOTE_ON) { note_on(t, ev_size, buf); } else if ((buf[0] & 0xF0) == LV2_MIDI_MSG_NOTE_OFF) { for (ActiveList::iterator i = _active_nodes.begin(); i != _active_nodes.end(); ++i) { SPtr action = dynamic_ptr_cast( (*i)->enter_action()); if (!action) { continue; } const size_t ev_size = action->event_size(); const uint8_t* ev = action->event(); if ((ev[0] & 0xF0) == LV2_MIDI_MSG_NOTE_ON && (ev[0] & 0x0F) == (buf[0] & 0x0F) && ev[1] == buf[1]) { // Same channel and note as on event resolve_note(t, ev_size, buf, *i); _active_nodes.erase(i); break; } } } } /** Finish the constructed machine and prepare it for use. * Resolve any stuck notes, quantize, etc. */ void MachineBuilder::resolve() { // Resolve stuck notes if (!_active_nodes.empty()) { for (list >::iterator i = _active_nodes.begin(); i != _active_nodes.end(); ++i) { cerr << "WARNING: Resolving stuck note." << endl; SPtr action = dynamic_ptr_cast( (*i)->enter_action()); if (!action) { continue; } const size_t ev_size = action->event_size(); const uint8_t* ev = action->event(); if (ev_size == 3 && (ev[0] & 0xF0) == LV2_MIDI_MSG_NOTE_ON) { const uint8_t note_off[3] = { ((LV2_MIDI_MSG_NOTE_OFF & 0xF0) | (ev[0] & 0x0F)), ev[1], 0x40 }; (*i)->set_exit_action( SPtr(new MidiAction(3, note_off))); set_node_duration((*i), _time - (*i)->enter_time()); (*i)->exit(NULL, _time); _machine->add_node((*i)); } } _active_nodes.clear(); } // Add initial node if necessary if (!_machine->nodes().empty()) { _machine->add_node(_initial_node); } } SPtr MachineBuilder::finish() { resolve(); return _machine; } } // namespace machina