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/*
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 <pbd/error.h>
#include <midi++/types.h>
#include <midi++/jack.h>
using namespace std;
using namespace MIDI;
using namespace PBD;
pthread_t JACK_MidiPort::_process_thread;
JACK_MidiPort::JACK_MidiPort(const XMLNode& node, jack_client_t* jack_client)
: Port(node)
, _jack_client(jack_client)
, _jack_input_port(NULL)
, _jack_output_port(NULL)
, _last_read_index(0)
, non_process_thread_fifo (512)
{
int err = create_ports (node);
if (!err) {
_ok = true;
}
}
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;
void *buffer = jack_port_get_buffer (_jack_output_port, nframes);
jack_midi_clear_buffer (buffer);
flush (buffer);
}
int
JACK_MidiPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
{
if (!is_process_thread()) {
Glib::Mutex::Lock lm (non_process_thread_fifo_lock);
RingBuffer<Event>::rw_vector vec;
non_process_thread_fifo.get_write_vector (&vec);
cerr << "Non-process thread writes " << msglen << " to " << name() << endl;
if (vec.len[0] + vec.len[1] < 1) {
error << "no space in FIFO for non-process thread MIDI write"
<< endmsg;
return 0;
}
if (vec.len[0]) {
vec.buf[0]->set (msg, msglen, timestamp);
} else {
vec.buf[1]->set (msg, msglen, timestamp);
}
non_process_thread_fifo.increment_write_idx (1);
return msglen;
} else {
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);
}
}
void
JACK_MidiPort::flush (void* jack_port_buffer)
{
RingBuffer<Event>::rw_vector vec;
size_t written;
non_process_thread_fifo.get_read_vector (&vec);
if (vec.len[0] + vec.len[1]) {
cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
}
if (vec.len[0]) {
Event* evp = vec.buf[0];
for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
jack_midi_event_write (jack_port_buffer,
(timestamp_t) evp->time(), evp->buffer(), evp->size());
}
}
if (vec.len[1]) {
Event* evp = vec.buf[1];
for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
jack_midi_event_write (jack_port_buffer,
(timestamp_t) evp->time(), evp->buffer(), evp->size());
}
}
if ((written = vec.len[0] + vec.len[1]) != 0) {
non_process_thread_fifo.increment_read_idx (written);
}
}
int
JACK_MidiPort::read(byte * buf, size_t bufsize)
{
assert(_currently_in_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++);
// XXX this doesn't handle ev.size > max
if (!err) {
size_t limit = min (bufsize, ev.size);
memcpy(buf, ev.buffer, limit);
return limit;
} else {
return 0;
}
}
int
JACK_MidiPort::create_ports(const XMLNode& node)
{
Descriptor desc (node);
assert(!_jack_input_port);
assert(!_jack_output_port);
jack_nframes_t nframes = jack_get_buffer_size(_jack_client);
bool ret = true;
if (desc.mode == O_RDWR || desc.mode == O_WRONLY) {
_jack_output_port = jack_port_register(_jack_client,
string(desc.tag).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 (desc.mode == O_RDWR || desc.mode == O_RDONLY) {
_jack_input_port = jack_port_register(_jack_client,
string(desc.tag).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;
}
XMLNode&
JACK_MidiPort::get_state () const
{
XMLNode& root (Port::get_state ());
return root;
}
void
JACK_MidiPort::set_state (const XMLNode& node)
{
}
void
JACK_MidiPort::set_process_thread (pthread_t thr)
{
_process_thread = thr;
}
bool
JACK_MidiPort::is_process_thread()
{
return (pthread_self() == _process_thread);
}
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