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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 <ardour/jack_midi_port.h>
using namespace ARDOUR;
JackMidiPort::JackMidiPort (const std::string& name, Flags flgs, MidiBuffer* buf)
: Port (name, flgs)
, JackPort (name, DataType::MIDI, flgs)
, BaseMidiPort (name, flgs)
, _has_been_mixed_down (false)
{
// MIDI ports always need a buffer since jack buffer format is different
assert(buf);
_buffer = buf;
_own_buffer = false;
}
void
JackMidiPort::cycle_start (nframes_t nframes, nframes_t offset)
{
/* FIXME: offset */
_buffer->clear();
assert(_buffer->size() == 0);
if (_flags & IsInput) {
return;
}
// We're an output - delete the midi_events.
void* jack_buffer = jack_port_get_buffer (_port, nframes);
jack_midi_clear_buffer (jack_buffer);
}
MidiBuffer &
JackMidiPort::get_midi_buffer( nframes_t nframes, nframes_t offset ) {
if (_has_been_mixed_down)
return *_buffer;
if (_flags & IsOutput) {
return *_buffer;
}
// We're an input - copy Jack events to internal buffer
void* jack_buffer = jack_port_get_buffer(_port, nframes);
const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
assert(event_count < _buffer->capacity());
jack_midi_event_t ev;
for (nframes_t i=0; i < event_count; ++i) {
jack_midi_event_get (&ev, jack_buffer, i);
// i guess this should do but i leave it off to test the rest first.
//if (ev.time > offset && ev.time < offset+nframes)
_buffer->push_back (ev);
}
assert(_buffer->size() == event_count);
/*if (_buffer->size() > 0)
cerr << "JackMIDIPort got " << event_count << " events (buf " << _buffer << ")" << endl;*/
if (nframes)
_has_been_mixed_down = true;
return *_buffer;
}
void
JackMidiPort::cycle_end (nframes_t nframes, nframes_t offset)
{
/* FIXME: offset */
_has_been_mixed_down = false;
#if 0
if (_flags & IsInput) {
return;
}
// We're an output - copy events from source buffer to Jack buffer
void* jack_buffer = jack_port_get_buffer (_port, nframes);
jack_midi_clear_buffer (jack_buffer);
for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
const Evoral::Event& ev = *i;
// event times should be frames, relative to cycle start
assert(ev.time() >= 0);
assert(ev.time() < nframes);
jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
}
#endif
}
void
JackMidiPort::flush_buffers (nframes_t nframes, nframes_t offset)
{
/* FIXME: offset */
if (_flags & IsInput) {
return;
}
void* jack_buffer = jack_port_get_buffer (_port, nframes);
for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
const Evoral::Event& ev = *i;
// event times should be frames, relative to cycle start
assert(ev.time() >= 0);
assert(ev.time() < (nframes+offset));
if (ev.time() >= offset)
jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
}
}
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