David Robillard
b8e9b3f071
git-svn-id: svn://localhost/ardour2/branches/midi@1782 d708f5d6-7413-0410-9779-e7cbd77b26cf
128 lines
3.2 KiB
C++
128 lines
3.2 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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Written by Dave Robillard
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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 <fcntl.h>
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#include <cerrno>
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#include <cassert>
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#include <midi++/types.h>
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#include <midi++/jack.h>
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#include <midi++/port_request.h>
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#include <midi++/jackcompat.h>
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using namespace std;
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using namespace MIDI;
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JACK_MidiPort::JACK_MidiPort(PortRequest & req, jack_client_t* jack_client)
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: Port(req)
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, _jack_client(jack_client)
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, _jack_input_port(NULL)
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, _jack_output_port(NULL)
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, _last_read_index(0)
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{
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int err = create_ports(req);
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if (!err) {
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req.status = PortRequest::OK;
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_ok = true;
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} else {
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req.status = PortRequest::Unknown;
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}
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}
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JACK_MidiPort::~JACK_MidiPort()
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{
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// FIXME: remove port
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}
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void
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JACK_MidiPort::cycle_start (nframes_t nframes)
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{
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Port::cycle_start(nframes);
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assert(_nframes_this_cycle == nframes);
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_last_read_index = 0;
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jack_midi_clear_buffer(jack_port_get_buffer(_jack_output_port, nframes));
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}
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int
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JACK_MidiPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
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{
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assert(_currently_in_cycle);
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assert(timestamp < _nframes_this_cycle);
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assert(_jack_output_port);
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// FIXME: return value correct?
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return jack_midi_event_write (
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jack_port_get_buffer(_jack_output_port, _nframes_this_cycle),
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timestamp, msg, msglen);
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}
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int
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JACK_MidiPort::read(byte * buf, size_t max, timestamp_t timestamp)
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{
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assert(_currently_in_cycle);
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assert(timestamp < _nframes_this_cycle);
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assert(_jack_input_port);
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jack_midi_event_t ev;
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int err = jack_midi_event_get (&ev,
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jack_port_get_buffer(_jack_input_port, _nframes_this_cycle),
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_last_read_index++);
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if (!err) {
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memcpy(buf, ev.buffer, ev.size);
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return ev.size;
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} else {
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return 0;
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}
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}
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int
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JACK_MidiPort::create_ports(PortRequest & req)
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{
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assert(!_jack_input_port);
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assert(!_jack_output_port);
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jack_nframes_t nframes = jack_get_buffer_size(_jack_client);
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bool ret = true;
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if (req.mode == O_RDWR || req.mode == O_WRONLY) {
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_jack_output_port = jack_port_register(_jack_client,
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string(req.tagname).append("_out").c_str(),
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JACK_DEFAULT_MIDI_TYPE, JackPortIsOutput, 0);
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jack_midi_clear_buffer(
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jack_port_get_buffer(_jack_output_port, nframes));
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ret = ret && (_jack_output_port != NULL);
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}
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if (req.mode == O_RDWR || req.mode == O_RDONLY) {
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_jack_input_port = jack_port_register(_jack_client,
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string(req.tagname).append("_in").c_str(),
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JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
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jack_midi_clear_buffer(
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jack_port_get_buffer(_jack_input_port, nframes));
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ret = ret && (_jack_input_port != NULL);
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}
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return ret ? 0 : -1;
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}
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