Re-enable MIDI CC controller bars and other immediate output (hans commented out, tsk tsk). Write channel mode as textual enumeration instead of magic number. Better atomic (almost) channel mode switching on MIDI ring buffer (was a possible, if unlikely, source of corruption). Handle some cases of broken MIDI, and oversized events, more gracefully. git-svn-id: svn://localhost/ardour2/branches/3.0@3335 d708f5d6-7413-0410-9779-e7cbd77b26cf
254 lines
5.8 KiB
C++
254 lines
5.8 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 <pbd/error.h>
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#include <midi++/types.h>
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#include <midi++/jack.h>
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using namespace std;
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using namespace MIDI;
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using namespace PBD;
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pthread_t JACK_MidiPort::_process_thread;
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JACK_MidiPort::JACK_MidiPort(const XMLNode& node, jack_client_t* jack_client)
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: Port(node)
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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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, non_process_thread_fifo (512)
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{
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int err = create_ports (node);
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if (!err) {
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_ok = true;
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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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_last_write_timestamp = 0;
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void *buffer = jack_port_get_buffer (_jack_output_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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int
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JACK_MidiPort::write(byte * msg, size_t msglen, timestamp_t timestamp)
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{
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int ret = 0;
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if (!is_process_thread()) {
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Glib::Mutex::Lock lm (non_process_thread_fifo_lock);
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RingBuffer<Event>::rw_vector vec;
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non_process_thread_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"
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<< endmsg;
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return 0;
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}
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if (vec.len[0]) {
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vec.buf[0]->set (msg, msglen, timestamp);
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} else {
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vec.buf[1]->set (msg, msglen, timestamp);
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}
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non_process_thread_fifo.increment_write_idx (1);
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ret = msglen;
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} else {
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assert(_jack_output_port);
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assert(timestamp < _nframes_this_cycle);
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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 (jack_midi_event_write (jack_port_get_buffer (_jack_output_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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ret = 0;
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cerr << "write of " << msglen << " failed, port holds "
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<< jack_midi_get_event_count (jack_port_get_buffer (_jack_output_port, _nframes_this_cycle))
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<< endl;
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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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}
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}
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if (ret > 0 && output_parser) {
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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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output_parser->scanner (msg[i]);
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}
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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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JACK_MidiPort::flush (void* jack_port_buffer)
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{
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RingBuffer<Event>::rw_vector vec;
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size_t written;
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non_process_thread_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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Event* 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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Event* 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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non_process_thread_fifo.increment_read_idx (written);
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}
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}
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int
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JACK_MidiPort::read(byte * buf, size_t bufsize)
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{
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assert(_currently_in_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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// XXX this doesn't handle ev.size > max
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if (!err) {
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size_t limit = min (bufsize, ev.size);
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memcpy(buf, ev.buffer, limit);
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if (input_parser) {
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input_parser->raw_preparse (*input_parser, buf, limit);
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for (size_t i = 0; i < limit; i++) {
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input_parser->scanner (buf[i]);
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}
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input_parser->raw_postparse (*input_parser, buf, limit);
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}
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return limit;
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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(const XMLNode& node)
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{
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Descriptor desc (node);
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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 (desc.mode == O_RDWR || desc.mode == O_WRONLY) {
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_jack_output_port = jack_port_register(_jack_client,
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string(desc.tag).append("_out").c_str(),
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JACK_DEFAULT_MIDI_TYPE, JackPortIsOutput, 0);
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jack_midi_clear_buffer(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 (desc.mode == O_RDWR || desc.mode == O_RDONLY) {
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_jack_input_port = jack_port_register(_jack_client,
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string(desc.tag).append("_in").c_str(),
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JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
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jack_midi_clear_buffer(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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XMLNode&
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JACK_MidiPort::get_state () const
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{
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XMLNode& root (Port::get_state ());
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return root;
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}
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void
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JACK_MidiPort::set_state (const XMLNode& node)
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{
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}
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void
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JACK_MidiPort::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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JACK_MidiPort::is_process_thread()
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{
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return (pthread_self() == _process_thread);
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}
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