David Robillard
d7db3f757f
Rewrote MidiEvent to be a well-behaved self-contained object that optionally owns it's buffer, has proper copying semantics, etc. Fixed crazy bugs triggered by adding lots of events with varying times to a region. Speed up initial session display significantly (don't redraw each MIDI region tons of times, though still happens more than once and can use fixing...). git-svn-id: svn://localhost/ardour2/trunk@2213 d708f5d6-7413-0410-9779-e7cbd77b26cf
112 lines
2.6 KiB
C++
112 lines
2.6 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 <iostream>
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#include <ardour/midi_port.h>
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#include <ardour/data_type.h>
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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 (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 nframes_t event_count
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= jack_midi_get_event_count(jack_buffer);
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assert(event_count < _buffer.capacity());
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jack_midi_event_t ev;
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for (nframes_t i=0; i < event_count; ++i) {
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jack_midi_event_get(&ev, jack_buffer, i);
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_buffer.push_back(ev);
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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 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);
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for (MidiBuffer::iterator i = _buffer.begin(); i != _buffer.end(); ++i) {
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const MidiEvent& ev = *i;
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// event times should be frames, relative to cycle start
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assert(ev.time() >= 0);
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assert(ev.time() < _nframes_this_cycle);
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jack_midi_event_write(jack_buffer, (jack_nframes_t)ev.time(), ev.buffer(), ev.size());
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}
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_nframes_this_cycle = 0;
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}
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