David Robillard
7250433f50
- MidiRingBuffer implementation - MidiDiskstream reading from playlists - MidiPlaylist reading from regions - MidiRegions returning random notes for the time being, but the inter-thread stuff works.. Horrible awful mess, not really commit worthy, but I need to move machines. Nothing to see here.. :) git-svn-id: svn://localhost/ardour2/branches/midi@835 d708f5d6-7413-0410-9779-e7cbd77b26cf
115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cassert>
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#include <ardour/midi_port.h>
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#include <ardour/data_type.h>
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#include <iostream>
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using namespace ARDOUR;
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using namespace std;
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MidiPort::MidiPort(jack_port_t* p)
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: Port(p)
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, _buffer(4096) // FIXME FIXME FIXME Jack needs to tell us this
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, _nframes_this_cycle(0)
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{
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DataType dt(_type);
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assert(dt == DataType::MIDI);
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reset();
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}
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MidiPort::~MidiPort()
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{
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}
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void
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MidiPort::cycle_start (jack_nframes_t nframes)
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{
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_buffer.clear();
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assert(_buffer.size() == 0);
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_nframes_this_cycle = nframes;
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if (_flags & JackPortIsOutput) {
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_buffer.silence(nframes);
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assert(_buffer.size() == 0);
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return;
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}
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// We're an input - copy Jack events to internal buffer
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void* jack_buffer = jack_port_get_buffer(_port, nframes);
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const jack_nframes_t event_count
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= jack_midi_port_get_info(jack_buffer, nframes)->event_count;
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assert(event_count < _buffer.capacity());
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MidiEvent ev;
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// FIXME: too slow, event struct is copied twice (here and MidiBuffer::push_back)
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for (jack_nframes_t i=0; i < event_count; ++i) {
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// This will fail to compile if we change MidiEvent to our own class
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jack_midi_event_get(static_cast<jack_midi_event_t*>(&ev), jack_buffer, i, nframes);
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_buffer.push_back(ev);
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// Convert note ons with velocity 0 to proper note offs
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// FIXME: Jack MIDI should guarantee this - does it?
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//if (ev->buffer[0] == MIDI_CMD_NOTE_ON && ev->buffer[2] == 0)
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// ev->buffer[0] = MIDI_CMD_NOTE_OFF;
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}
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assert(_buffer.size() == event_count);
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//if (_buffer.size() > 0)
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// cerr << "MIDIPort got " << event_count << " events." << endl;
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}
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void
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MidiPort::cycle_end()
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{
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if (_flags & JackPortIsInput) {
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_nframes_this_cycle = 0;
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return;
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}
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// We're an output - copy events from internal buffer to Jack buffer
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void* jack_buffer = jack_port_get_buffer(_port, _nframes_this_cycle);
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const jack_nframes_t event_count = _buffer.size();
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//if (event_count > 0)
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// cerr << "MIDIPort writing " << event_count << " events." << endl;
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jack_midi_clear_buffer(jack_buffer, _nframes_this_cycle);
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for (jack_nframes_t i=0; i < event_count; ++i) {
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const jack_midi_event_t& ev = _buffer[i];
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assert(ev.time < _nframes_this_cycle);
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jack_midi_event_write(jack_buffer, ev.time, ev.buffer, ev.size, _nframes_this_cycle);
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}
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_nframes_this_cycle = 0;
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}
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