487 lines
11 KiB
C++
487 lines
11 KiB
C++
/*
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Copyright (C) 1998 Paul Barton-Davis
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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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$Id$
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*/
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#include <iostream>
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#include <cstdio>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <jack/jack.h>
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#include <jack/midiport.h>
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#include "pbd/xml++.h"
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#include "pbd/error.h"
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#include "pbd/failed_constructor.h"
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#include "pbd/convert.h"
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#include "pbd/strsplit.h"
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#include "pbd/stacktrace.h"
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#include "midi++/types.h"
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#include "midi++/jack_midi_port.h"
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#include "midi++/channel.h"
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using namespace MIDI;
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using namespace std;
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using namespace PBD;
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namespace Evoral {
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template class EventRingBuffer<timestamp_t>;
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}
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pthread_t JackMIDIPort::_process_thread;
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Signal0<void> JackMIDIPort::JackHalted;
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Signal0<void> JackMIDIPort::MakeConnections;
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JackMIDIPort::JackMIDIPort (string const & name, Flags flags, jack_client_t* jack_client)
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: Port (name, flags)
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, _currently_in_cycle (false)
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, _nframes_this_cycle (0)
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, _jack_client (jack_client)
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, _jack_port (0)
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, _last_write_timestamp (0)
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, output_fifo (512)
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, input_fifo (1024)
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#ifndef PLATFORM_WINDOWS
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, xthread (true)
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#endif
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{
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assert (jack_client);
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init (name, flags);
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}
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JackMIDIPort::JackMIDIPort (const XMLNode& node, jack_client_t* jack_client)
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: Port (node)
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, _currently_in_cycle (false)
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, _nframes_this_cycle (0)
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, _jack_client (jack_client)
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, _jack_port (0)
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, _last_write_timestamp (0)
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, output_fifo (512)
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, input_fifo (1024)
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#ifndef PLATFORM_WINDOWS
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, xthread (true)
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#endif
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{
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assert (jack_client);
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Descriptor desc (node);
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init (desc.tag, desc.flags);
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set_state (node);
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}
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void
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JackMIDIPort::init (const string& /*name*/, Flags /*flags*/)
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{
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if (!create_port ()) {
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_ok = true;
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}
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MakeConnections.connect_same_thread (connect_connection, boost::bind (&JackMIDIPort::make_connections, this));
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JackHalted.connect_same_thread (halt_connection, boost::bind (&JackMIDIPort::jack_halted, this));
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}
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JackMIDIPort::~JackMIDIPort ()
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{
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if (_jack_port) {
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if (_jack_client) {
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jack_port_unregister (_jack_client, _jack_port);
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_jack_port = 0;
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}
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}
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}
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void
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JackMIDIPort::parse (framecnt_t timestamp)
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{
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byte buf[512];
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/* NOTE: parsing is done (if at all) by initiating a read from
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the port. Each port implementation calls on the parser
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once it has data ready.
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*/
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_parser->set_timestamp (timestamp);
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while (1) {
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// cerr << "+++ READ ON " << name() << endl;
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int nread = read (buf, sizeof (buf));
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// cerr << "-- READ (" << nread << " ON " << name() << endl;
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if (nread > 0) {
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if ((size_t) nread < sizeof (buf)) {
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break;
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} else {
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continue;
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}
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} else if (nread == 0) {
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break;
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} else if (errno == EAGAIN) {
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break;
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} else {
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fatal << "Error reading from MIDI port " << name() << endmsg;
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/*NOTREACHED*/
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}
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}
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}
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void
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JackMIDIPort::cycle_start (pframes_t nframes)
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{
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assert (_jack_port);
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_currently_in_cycle = true;
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_nframes_this_cycle = nframes;
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assert(_nframes_this_cycle == nframes);
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if (sends_output()) {
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void *buffer = jack_port_get_buffer (_jack_port, nframes);
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jack_midi_clear_buffer (buffer);
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flush (buffer);
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}
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if (receives_input()) {
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void* jack_buffer = jack_port_get_buffer(_jack_port, nframes);
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const pframes_t event_count = jack_midi_get_event_count(jack_buffer);
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jack_midi_event_t ev;
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timestamp_t cycle_start_frame = jack_last_frame_time (_jack_client);
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for (pframes_t i = 0; i < event_count; ++i) {
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jack_midi_event_get (&ev, jack_buffer, i);
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input_fifo.write (cycle_start_frame + ev.time, (Evoral::EventType) 0, ev.size, ev.buffer);
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}
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if (event_count) {
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#ifndef PLATFORM_WINDOWS
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xthread.wakeup ();
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#endif
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}
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}
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}
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void
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JackMIDIPort::cycle_end ()
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{
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if (sends_output()) {
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flush (jack_port_get_buffer (_jack_port, _nframes_this_cycle));
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}
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_currently_in_cycle = false;
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_nframes_this_cycle = 0;
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}
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void
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JackMIDIPort::jack_halted ()
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{
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_jack_client = 0;
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_jack_port = 0;
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}
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void
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JackMIDIPort::drain (int check_interval_usecs)
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{
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RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
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if (is_process_thread()) {
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error << "Process thread called MIDI::JackMIDIPort::drain() - this cannot work" << endmsg;
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return;
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}
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while (1) {
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output_fifo.get_write_vector (&vec);
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if (vec.len[0] + vec.len[1] >= output_fifo.bufsize() - 1) {
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break;
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}
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g_usleep (check_interval_usecs);
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}
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}
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int
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JackMIDIPort::write (const MIDI::byte * msg, size_t msglen, timestamp_t timestamp)
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{
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int ret = 0;
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if (!_jack_client || !_jack_port) {
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/* poof ! make it just vanish into thin air, since we are no
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longer connected to JACK.
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*/
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return msglen;
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}
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if (!sends_output()) {
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return ret;
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}
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if (!is_process_thread()) {
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Glib::Threads::Mutex::Lock lm (output_fifo_lock);
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RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0} };
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output_fifo.get_write_vector (&vec);
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if (vec.len[0] + vec.len[1] < 1) {
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error << "no space in FIFO for non-process thread MIDI write" << endmsg;
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return 0;
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}
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if (vec.len[0]) {
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if (!vec.buf[0]->owns_buffer()) {
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vec.buf[0]->set_buffer (0, 0, true);
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}
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vec.buf[0]->set (msg, msglen, timestamp);
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} else {
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if (!vec.buf[1]->owns_buffer()) {
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vec.buf[1]->set_buffer (0, 0, true);
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}
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vec.buf[1]->set (msg, msglen, timestamp);
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}
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output_fifo.increment_write_idx (1);
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ret = msglen;
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} else {
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if (timestamp >= _nframes_this_cycle) {
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std::cerr << "attempting to write MIDI event of " << msglen << " bytes at time "
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<< timestamp << " of " << _nframes_this_cycle
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<< " (this will not work - needs a code fix)"
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<< std::endl;
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}
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if (_currently_in_cycle) {
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if (timestamp == 0) {
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timestamp = _last_write_timestamp;
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}
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if ((ret = jack_midi_event_write (jack_port_get_buffer (_jack_port, _nframes_this_cycle),
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timestamp, msg, msglen)) == 0) {
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ret = msglen;
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_last_write_timestamp = timestamp;
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} else {
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cerr << "write of " << msglen << " @ " << timestamp << " failed, port holds "
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<< jack_midi_get_event_count (jack_port_get_buffer (_jack_port, _nframes_this_cycle))
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<< " port is " << _jack_port
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<< " ntf = " << _nframes_this_cycle
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<< " buf = " << jack_port_get_buffer (_jack_port, _nframes_this_cycle)
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<< " ret = " << ret
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<< endl;
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PBD::stacktrace (cerr, 20);
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ret = 0;
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}
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} else {
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cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
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PBD::stacktrace (cerr, 20);
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}
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}
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if (ret > 0 && _parser) {
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// ardour doesn't care about this and neither should your app, probably
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// output_parser->raw_preparse (*output_parser, msg, ret);
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for (int i = 0; i < ret; i++) {
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_parser->scanner (msg[i]);
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}
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// ardour doesn't care about this and neither should your app, probably
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// output_parser->raw_postparse (*output_parser, msg, ret);
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}
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return ret;
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}
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void
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JackMIDIPort::flush (void* jack_port_buffer)
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{
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RingBuffer< Evoral::Event<double> >::rw_vector vec = { { 0, 0 }, { 0, 0 } };
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size_t written;
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output_fifo.get_read_vector (&vec);
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if (vec.len[0] + vec.len[1]) {
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// cerr << "Flush " << vec.len[0] + vec.len[1] << " events from non-process FIFO\n";
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}
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if (vec.len[0]) {
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Evoral::Event<double>* evp = vec.buf[0];
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for (size_t n = 0; n < vec.len[0]; ++n, ++evp) {
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jack_midi_event_write (jack_port_buffer,
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(timestamp_t) evp->time(), evp->buffer(), evp->size());
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}
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}
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if (vec.len[1]) {
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Evoral::Event<double>* evp = vec.buf[1];
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for (size_t n = 0; n < vec.len[1]; ++n, ++evp) {
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jack_midi_event_write (jack_port_buffer,
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(timestamp_t) evp->time(), evp->buffer(), evp->size());
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}
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}
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if ((written = vec.len[0] + vec.len[1]) != 0) {
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output_fifo.increment_read_idx (written);
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}
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}
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int
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JackMIDIPort::read (MIDI::byte *, size_t)
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{
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if (!receives_input()) {
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return 0;
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}
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timestamp_t time;
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Evoral::EventType type;
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uint32_t size;
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vector<MIDI::byte> buffer(input_fifo.capacity());
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while (input_fifo.read (&time, &type, &size, &buffer[0])) {
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_parser->set_timestamp (time);
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for (uint32_t i = 0; i < size; ++i) {
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_parser->scanner (buffer[i]);
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}
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}
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return 0;
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}
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int
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JackMIDIPort::create_port ()
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{
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_jack_port = jack_port_register(_jack_client, _tagname.c_str(), JACK_DEFAULT_MIDI_TYPE, _flags, 0);
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return _jack_port == 0 ? -1 : 0;
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}
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XMLNode&
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JackMIDIPort::get_state () const
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{
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XMLNode& root = Port::get_state ();
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#if 0
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byte device_inquiry[6];
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device_inquiry[0] = 0xf0;
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device_inquiry[0] = 0x7e;
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device_inquiry[0] = 0x7f;
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device_inquiry[0] = 0x06;
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device_inquiry[0] = 0x02;
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device_inquiry[0] = 0xf7;
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write (device_inquiry, sizeof (device_inquiry), 0);
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#endif
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if (_jack_port) {
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const char** jc = jack_port_get_connections (_jack_port);
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string connection_string;
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if (jc) {
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for (int i = 0; jc[i]; ++i) {
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if (i > 0) {
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connection_string += ',';
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}
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connection_string += jc[i];
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}
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free (jc);
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}
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if (!connection_string.empty()) {
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root.add_property ("connections", connection_string);
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}
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} else {
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if (!_connections.empty()) {
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root.add_property ("connections", _connections);
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}
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}
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return root;
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}
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void
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JackMIDIPort::set_state (const XMLNode& node)
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{
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const XMLProperty* prop;
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if ((prop = node.property ("tag")) == 0 || prop->value() != _tagname) {
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return;
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}
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Port::set_state (node);
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if ((prop = node.property ("connections")) != 0) {
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_connections = prop->value ();
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}
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}
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void
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JackMIDIPort::make_connections ()
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{
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if (!_connections.empty()) {
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vector<string> ports;
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split (_connections, ports, ',');
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for (vector<string>::iterator x = ports.begin(); x != ports.end(); ++x) {
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if (_jack_client) {
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if (receives_input()) {
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jack_connect (_jack_client, (*x).c_str(), jack_port_name (_jack_port));
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} else {
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jack_connect (_jack_client, jack_port_name (_jack_port), (*x).c_str());
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}
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/* ignore failures */
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}
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}
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}
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connect_connection.disconnect ();
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}
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void
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JackMIDIPort::set_process_thread (pthread_t thr)
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{
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_process_thread = thr;
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}
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bool
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JackMIDIPort::is_process_thread()
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{
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return (pthread_equal(pthread_self(), _process_thread));
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}
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void
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JackMIDIPort::reestablish (jack_client_t* jack)
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{
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_jack_client = jack;
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int const r = create_port ();
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if (r) {
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PBD::error << "could not reregister ports for " << name() << endmsg;
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}
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}
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void
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JackMIDIPort::reconnect ()
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{
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make_connections ();
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}
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