Paul Davis
5183f9b772
git-svn-id: svn://localhost/ardour2/branches/midi@1789 d708f5d6-7413-0410-9779-e7cbd77b26cf
127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
/*
|
|
Copyright (C) 2006 Paul Davis
|
|
Written by Dave Robillard
|
|
|
|
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 <fcntl.h>
|
|
#include <cerrno>
|
|
#include <cassert>
|
|
|
|
#include <midi++/types.h>
|
|
#include <midi++/jack.h>
|
|
#include <midi++/port_request.h>
|
|
|
|
using namespace std;
|
|
using namespace MIDI;
|
|
|
|
JACK_MidiPort::JACK_MidiPort(PortRequest & req, jack_client_t* jack_client)
|
|
: Port(req)
|
|
, _jack_client(jack_client)
|
|
, _jack_input_port(NULL)
|
|
, _jack_output_port(NULL)
|
|
, _last_read_index(0)
|
|
{
|
|
int err = create_ports(req);
|
|
|
|
if (!err) {
|
|
req.status = PortRequest::OK;
|
|
_ok = true;
|
|
} else {
|
|
req.status = PortRequest::Unknown;
|
|
}
|
|
}
|
|
|
|
JACK_MidiPort::~JACK_MidiPort()
|
|
{
|
|
// FIXME: remove port
|
|
}
|
|
|
|
void
|
|
JACK_MidiPort::cycle_start (nframes_t nframes)
|
|
{
|
|
Port::cycle_start(nframes);
|
|
assert(_nframes_this_cycle == nframes);
|
|
_last_read_index = 0;
|
|
jack_midi_clear_buffer(jack_port_get_buffer(_jack_output_port, nframes));
|
|
}
|
|
|
|
int
|
|
JACK_MidiPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
|
|
{
|
|
assert(_currently_in_cycle);
|
|
assert(timestamp < _nframes_this_cycle);
|
|
assert(_jack_output_port);
|
|
|
|
// FIXME: return value correct?
|
|
return jack_midi_event_write (
|
|
jack_port_get_buffer(_jack_output_port, _nframes_this_cycle),
|
|
timestamp, msg, msglen);
|
|
}
|
|
|
|
int
|
|
JACK_MidiPort::read(byte * buf, size_t max, timestamp_t timestamp)
|
|
{
|
|
assert(_currently_in_cycle);
|
|
assert(timestamp < _nframes_this_cycle);
|
|
assert(_jack_input_port);
|
|
|
|
jack_midi_event_t ev;
|
|
|
|
int err = jack_midi_event_get (&ev,
|
|
jack_port_get_buffer(_jack_input_port, _nframes_this_cycle),
|
|
_last_read_index++);
|
|
|
|
if (!err) {
|
|
memcpy(buf, ev.buffer, ev.size);
|
|
return ev.size;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
JACK_MidiPort::create_ports(PortRequest & req)
|
|
{
|
|
assert(!_jack_input_port);
|
|
assert(!_jack_output_port);
|
|
|
|
jack_nframes_t nframes = jack_get_buffer_size(_jack_client);
|
|
|
|
bool ret = true;
|
|
|
|
if (req.mode == O_RDWR || req.mode == O_WRONLY) {
|
|
_jack_output_port = jack_port_register(_jack_client,
|
|
string(req.tagname).append("_out").c_str(),
|
|
JACK_DEFAULT_MIDI_TYPE, JackPortIsOutput, 0);
|
|
jack_midi_clear_buffer(
|
|
jack_port_get_buffer(_jack_output_port, nframes));
|
|
ret = ret && (_jack_output_port != NULL);
|
|
}
|
|
|
|
if (req.mode == O_RDWR || req.mode == O_RDONLY) {
|
|
_jack_input_port = jack_port_register(_jack_client,
|
|
string(req.tagname).append("_in").c_str(),
|
|
JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
|
|
jack_midi_clear_buffer(
|
|
jack_port_get_buffer(_jack_input_port, nframes));
|
|
ret = ret && (_jack_input_port != NULL);
|
|
}
|
|
|
|
return ret ? 0 : -1;
|
|
}
|
|
|