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Diffstat (limited to 'drumgizmo/input/jackmidi.cc')
| -rw-r--r-- | drumgizmo/input/jackmidi.cc | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drumgizmo/input/jackmidi.cc b/drumgizmo/input/jackmidi.cc new file mode 100644 index 0000000..2d399c2 --- /dev/null +++ b/drumgizmo/input/jackmidi.cc @@ -0,0 +1,145 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * jackmidi.cc + * + * Mo 25. Jan 11:26:06 CET 2016 + * Copyright 2016 Christian Glöckner + * cgloeckner@freenet.de + ****************************************************************************/ + +/* + * This file is part of DrumGizmo. + * + * DrumGizmo 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. + * + * DrumGizmo 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 DrumGizmo; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#include <iostream> +#include <cassert> + +#include "cpp11fix.h" // required for c++11 +#include "jackmidi.h" + +int const NOTE_ON = 0x90; + +JackMidiInputEngine::JackMidiInputEngine(JackClient& client) + : AudioInputEngine{} + , JackProcess{} + , client{client} + , port{nullptr} + , midimap{} + , midi_mapper{} + , list{nullptr} + , pos{0u} { + client.add(*this); +} + +JackMidiInputEngine::~JackMidiInputEngine() { + client.remove(*this); +} + +bool JackMidiInputEngine::isMidiEngine() { + return true; +} + +bool JackMidiInputEngine::init(Instruments& instruments) { + if (midimap == "") { + std::cerr << "[JackMidiInputEngine] Missing midimap filename\n"; + return false; + } + MidiMapParser p{midimap}; + if (p.parse()) { + std::cerr << "[JackmidiInputEngine] Failed to parse midimap '" + << midimap << "'\n"; + return false; + } + midi_mapper.midimap = p.midimap; + for (auto i = 0u; i < instruments.size(); ++i) { + auto name = instruments[i]->name(); + midi_mapper.instrmap[name] = i; + } + port = std::make_unique<JackPort>(client, "drumgizmo_midiin", + JACK_DEFAULT_MIDI_TYPE, JackPortIsInput); + return true; +} + +void JackMidiInputEngine::setParm(std::string parm, std::string value) { + if (parm == "midimap") { + // apply midimap filename + midimap = value; + + } else { + std::cerr << "[JackMidiInputEngine] Unsupported parameter '" + << parm << "'\n"; + } +} + +bool JackMidiInputEngine::start() { + client.activate(); + return true; +} + +void JackMidiInputEngine::stop() { +} + +void JackMidiInputEngine::pre() { +} + +event_t* JackMidiInputEngine::run(size_t pos, size_t len, size_t* nevents) { + *nevents = listsize; + event_t* l = list; + printf("Owning raw pointer at drumgizmo/input/jackmidiinput.cc - GET RID OF THEM!\n"); + list = (event_t *)malloc(sizeof(event_t) * 1000); + listsize = 0; + return l; +} + +void JackMidiInputEngine::post() { +} + +void JackMidiInputEngine::process(jack_nframes_t num_frames) { + assert(port != nullptr); + void* buffer = port->getBuffer(num_frames); + jack_nframes_t num_events = jack_midi_get_event_count(buffer); + + for(jack_nframes_t i = 0; i < num_events; ++i) { + jack_midi_event_t event; + jack_midi_event_get(&event, buffer, i); + if(event.size != 3) { + continue; + } + if((event.buffer[0] & NOTE_ON) != NOTE_ON) { + continue; + } + int key = event.buffer[1]; + int velocity = event.buffer[2]; + printf("Event key:%d vel:%d\n", key, velocity); + int k = midi_mapper.lookup(key); + if(k != -1 && velocity) { + list[listsize].type = TYPE_ONSET; + list[listsize].instrument = k; + list[listsize].velocity = velocity / 127.0; + list[listsize].offset = event.time; + ++listsize; + } + } + jack_midi_clear_buffer(buffer); + pos += num_frames; +} + +/* + DrumKit* kit; + size_t pos; + EventQueue *eventqueue; +*/ + |