git-svn-id: svn://localhost/ardour2/branches/3.0@3156 d708f5d6-7413-0410-9779-e7cbd77b26cf
238 lines
4.6 KiB
C++
238 lines
4.6 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 <fcntl.h>
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#include <errno.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 <midi++/types.h>
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#include <midi++/port.h>
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#include <midi++/channel.h>
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#include <midi++/factory.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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size_t Port::nports = 0;
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Port::Port (const XMLNode& node)
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: _currently_in_cycle(false)
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, _nframes_this_cycle(0)
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{
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Descriptor desc (node);
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_ok = false; /* derived class must set to true if constructor
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succeeds.
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*/
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bytes_written = 0;
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bytes_read = 0;
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input_parser = 0;
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output_parser = 0;
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slowdown = 0;
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_devname = desc.device;
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_tagname = desc.tag;
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_mode = desc.mode;
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if (_mode == O_RDONLY || _mode == O_RDWR) {
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input_parser = new Parser (*this);
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} else {
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input_parser = 0;
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}
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if (_mode == O_WRONLY || _mode == O_RDWR) {
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output_parser = new Parser (*this);
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} else {
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output_parser = 0;
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}
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for (int i = 0; i < 16; i++) {
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_channel[i] = new Channel (i, *this);
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if (input_parser) {
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_channel[i]->connect_input_signals ();
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}
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if (output_parser) {
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_channel[i]->connect_output_signals ();
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}
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}
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}
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Port::~Port ()
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{
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for (int i = 0; i < 16; i++) {
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delete _channel[i];
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}
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}
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void
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Port::parse ()
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{
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byte buf[512];
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/* parsing is done (if at all) by initiating a read from
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the port.
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*/
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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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/** Send a clock tick message.
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* \return true on success.
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*/
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bool
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Port::clock (timestamp_t timestamp)
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{
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static byte clockmsg = 0xf8;
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if (_mode != O_RDONLY) {
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return midimsg (&clockmsg, 1, timestamp);
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}
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return false;
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}
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void
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Port::cycle_start (nframes_t nframes)
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{
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_currently_in_cycle = true;
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_nframes_this_cycle = nframes;
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}
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void
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Port::cycle_end ()
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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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XMLNode&
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Port::get_state () const
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{
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XMLNode* node = new XMLNode ("MIDI-port");
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node->add_property ("tag", _tagname);
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node->add_property ("device", _devname);
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node->add_property ("mode", PortFactory::mode_to_string (_mode));
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node->add_property ("type", get_typestring());
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return *node;
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}
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void
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Port::set_state (const XMLNode& node)
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{
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// relax
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}
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void
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Port::gtk_read_callback (void *ptr, int fd, int cond)
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{
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byte buf[64];
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((Port *)ptr)->read (buf, sizeof (buf));
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}
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void
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Port::write_callback (byte *msg, unsigned int len, void *ptr)
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{
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((Port *)ptr)->write (msg, len, 0);
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}
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std::ostream & MIDI::operator << ( std::ostream & os, const MIDI::Port & port )
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{
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using namespace std;
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os << "MIDI::Port { ";
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os << "device: " << port.device();
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os << "; ";
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os << "name: " << port.name();
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os << "; ";
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os << "type: " << port.type();
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os << "; ";
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os << "mode: " << port.mode();
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os << "; ";
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os << "ok: " << port.ok();
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os << "; ";
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os << " }";
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return os;
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}
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Port::Descriptor::Descriptor (const XMLNode& node)
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{
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const XMLProperty *prop;
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bool have_tag = false;
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bool have_device = false;
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bool have_type = false;
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bool have_mode = false;
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if ((prop = node.property ("tag")) != 0) {
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tag = prop->value();
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have_tag = true;
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}
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if ((prop = node.property ("device")) != 0) {
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device = prop->value();
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have_device = true;
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}
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if ((prop = node.property ("type")) != 0) {
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type = PortFactory::string_to_type (prop->value());
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have_type = true;
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}
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if ((prop = node.property ("mode")) != 0) {
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mode = PortFactory::string_to_mode (prop->value());
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have_mode = true;
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}
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if (!have_tag || !have_device || !have_type || !have_mode) {
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throw failed_constructor();
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}
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}
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