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/*
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"
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_in_process (false)
{
_buffer = new MidiBuffer (raw_buffer_size(0));
}
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 ()) {
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);
}
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::flush_buffers (pframes_t nframes, framepos_t time)
{
if (sends_output ()) {
void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
// Feed the data through the MidiStateTracker
bool did_loop;
_midi_state_tracker.track (_buffer->begin(), _buffer->end(), did_loop);
if (did_loop || _resolve_in_process) {
/* add necessary note offs */
_midi_state_tracker.resolve_notes (*_buffer, time);
}
_resolve_in_process = false;
for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
const Evoral::Event<framepos_t>& ev = *i;
// event times are in frames, relative to cycle start
assert (ev.time() < (nframes + _global_port_buffer_offset + _port_buffer_offset));
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.time()
<< " < " << _global_port_buffer_offset + _port_buffer_offset << endl;
}
}
}
}
void
MidiPort::transport_stopped ()
{
_resolve_in_process = true;
}
size_t
MidiPort::raw_buffer_size (pframes_t nframes) const
{
return jack_midi_max_event_size (jack_port_get_buffer (_jack_port, nframes));
}
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