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livetrax/libs/ardour/midi_port.cc
Carl Hetherington 23973bae24 A few tweaks to make Ardour build in GCC -std=c++0x mode.
git-svn-id: svn://localhost/ardour2/branches/3.0@11983 d708f5d6-7413-0410-9779-e7cbd77b26cf
2012-04-15 19:28:44 +00:00

216 lines
5.2 KiB
C++

/*
Copyright (C) 2006 Paul Davis
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cassert>
#include <iostream>
#include "ardour/midi_port.h"
#include "ardour/data_type.h"
#include "ardour/audioengine.h"
using namespace ARDOUR;
using namespace std;
MidiPort::MidiPort (const std::string& name, Flags flags)
: Port (name, DataType::MIDI, flags)
, _has_been_mixed_down (false)
, _resolve_required (false)
, _input_active (true)
{
_buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
}
MidiPort::~MidiPort()
{
delete _buffer;
}
void
MidiPort::cycle_start (pframes_t nframes)
{
Port::cycle_start (nframes);
_buffer->clear ();
assert (_buffer->size () == 0);
if (sends_output ()) {
jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, nframes));
}
}
MidiBuffer &
MidiPort::get_midi_buffer (pframes_t nframes)
{
if (_has_been_mixed_down) {
return *_buffer;
}
if (receives_input ()) {
if (_input_active) {
void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
const pframes_t event_count = jack_midi_get_event_count (jack_buffer);
assert (event_count < _buffer->capacity());
/* suck all relevant MIDI events from the JACK MIDI port buffer
into our MidiBuffer
*/
for (pframes_t i = 0; i < event_count; ++i) {
jack_midi_event_t ev;
jack_midi_event_get (&ev, jack_buffer, i);
if (ev.buffer[0] == 0xfe) {
/* throw away active sensing */
continue;
}
/* check that the event is in the acceptable time range */
if ((ev.time >= (_global_port_buffer_offset + _port_buffer_offset)) &&
(ev.time < (_global_port_buffer_offset + _port_buffer_offset + nframes))) {
_buffer->push_back (ev);
} else {
cerr << "Dropping incoming MIDI at time " << ev.time << "; offset="
<< _global_port_buffer_offset << " limit="
<< (_global_port_buffer_offset + _port_buffer_offset + nframes) << "\n";
}
}
} else {
_buffer->silence (nframes);
}
} else {
_buffer->silence (nframes);
}
if (nframes) {
_has_been_mixed_down = true;
}
return *_buffer;
}
void
MidiPort::cycle_end (pframes_t /*nframes*/)
{
_has_been_mixed_down = false;
}
void
MidiPort::cycle_split ()
{
_has_been_mixed_down = false;
}
void
MidiPort::resolve_notes (void* jack_buffer, MidiBuffer::TimeType when)
{
for (uint8_t channel = 0; channel <= 0xF; channel++) {
uint8_t ev[3] = { ((uint8_t) (MIDI_CMD_CONTROL | channel)), MIDI_CTL_SUSTAIN, 0 };
/* we need to send all notes off AND turn the
* sustain/damper pedal off to handle synths
* that prioritize sustain over AllNotesOff
*/
if (jack_midi_event_write (jack_buffer, when, ev, 3) != 0) {
cerr << "failed to deliver sustain-zero on channel " << channel << " on port " << name() << endl;
}
ev[1] = MIDI_CTL_ALL_NOTES_OFF;
if (jack_midi_event_write (jack_buffer, 0, ev, 3) != 0) {
cerr << "failed to deliver ALL NOTES OFF on channel " << channel << " on port " << name() << endl;
}
}
}
void
MidiPort::flush_buffers (pframes_t nframes)
{
if (sends_output ()) {
void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
if (_resolve_required) {
/* resolve all notes at the start of the buffer */
resolve_notes (jack_buffer, 0);
_resolve_required = false;
}
for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
const Evoral::MIDIEvent<MidiBuffer::TimeType> ev (*i, false);
// event times are in frames, relative to cycle start
assert (ev.time() < (nframes + _global_port_buffer_offset + _port_buffer_offset));
if (ev.event_type() == LoopEventType) {
resolve_notes (jack_buffer, ev.time());
continue;
}
if (ev.time() >= _global_port_buffer_offset + _port_buffer_offset) {
if (jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size()) != 0) {
cerr << "write failed, drop flushed note off on the floor, time "
<< ev.time() << " > " << _global_port_buffer_offset + _port_buffer_offset << endl;
}
} else {
cerr << "drop flushed event on the floor, time " << ev
<< " to early for " << _global_port_buffer_offset + _port_buffer_offset << endl;
}
}
}
}
void
MidiPort::transport_stopped ()
{
_resolve_required = true;
}
void
MidiPort::realtime_locate ()
{
_resolve_required = true;
}
void
MidiPort::reset ()
{
Port::reset ();
delete _buffer;
_buffer = new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI));
}
void
MidiPort::set_input_active (bool yn)
{
_input_active = yn;
}