git-svn-id: svn://localhost/ardour2/branches/3.0@7520 d708f5d6-7413-0410-9779-e7cbd77b26cf
181 lines
4.4 KiB
C++
181 lines
4.4 KiB
C++
/*
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Copyright (C) 2006,2007 John Anderson
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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 "surface_port.h"
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#include "mackie_control_exception.h"
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#include "controls.h"
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#include <midi++/types.h>
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#include <midi++/port.h>
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#include <sigc++/sigc++.h>
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#include <boost/shared_array.hpp>
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#include "i18n.h"
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#include <sstream>
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#include <cstring>
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#include <cerrno>
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using namespace std;
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using namespace Mackie;
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SurfacePort::SurfacePort()
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: _input_port (0), _output_port (0), _number (0), _active (false)
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{
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}
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SurfacePort::SurfacePort (MIDI::Port & input_port, MIDI::Port & output_port, int number)
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: _input_port (&input_port), _output_port (&output_port), _number (number), _active (false)
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{
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}
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SurfacePort::~SurfacePort()
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{
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#ifdef PORT_DEBUG
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cout << "~SurfacePort::SurfacePort()" << endl;
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#endif
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// make sure another thread isn't reading or writing as we close the port
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Glib::RecMutex::Lock lock( _rwlock );
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_active = false;
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#ifdef PORT_DEBUG
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cout << "~SurfacePort::SurfacePort() finished" << endl;
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#endif
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}
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// wrapper for one day when strerror_r is working properly
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string fetch_errmsg( int error_number )
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{
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char * msg = strerror( error_number );
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return msg;
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}
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MidiByteArray SurfacePort::read()
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{
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const int max_buf_size = 512;
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MIDI::byte buf[max_buf_size];
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MidiByteArray retval;
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// check active. Mainly so that the destructor
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// doesn't destroy the mutex while it's still locked
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if ( !active() ) return retval;
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// return nothing read if the lock isn't acquired
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#if 0
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Glib::RecMutex::Lock lock( _rwlock, Glib::TRY_LOCK );
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if ( !lock.locked() )
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{
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cout << "SurfacePort::read not locked" << endl;
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return retval;
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}
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// check active again - destructor sequence
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if ( !active() ) return retval;
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#endif
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// read port and copy to return value
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int nread = input_port().read( buf, sizeof (buf) );
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if (nread >= 0) {
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retval.copy( nread, buf );
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if ((size_t) nread == sizeof (buf))
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{
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#ifdef PORT_DEBUG
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cout << "SurfacePort::read recursive" << endl;
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#endif
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retval << read();
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}
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}
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else
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{
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if ( errno != EAGAIN )
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{
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ostringstream os;
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os << "Surface: error reading from port: " << input_port().name();
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os << ": " << errno << fetch_errmsg( errno );
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cout << os.str() << endl;
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inactive_event();
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throw MackieControlException( os.str() );
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}
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}
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#ifdef PORT_DEBUG
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cout << "SurfacePort::read: " << retval << endl;
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#endif
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return retval;
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}
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void SurfacePort::write( const MidiByteArray & mba )
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{
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#ifdef PORT_DEBUG
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cout << "SurfacePort::write: " << mba << " to " << output_port().name() << endl;
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#endif
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// check active before and after lock - to make sure
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// that the destructor doesn't destroy the mutex while
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// it's still in use
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if ( !active() ) return;
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Glib::RecMutex::Lock lock( _rwlock );
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if ( !active() ) return;
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int count = output_port().write( mba.bytes().get(), mba.size(), 0);
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if ( count != (int)mba.size() )
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{
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if ( errno == 0 )
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{
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cout << "port overflow on " << output_port().name() << ". Did not write all of " << mba << endl;
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}
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else if ( errno != EAGAIN )
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{
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ostringstream os;
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os << "Surface: couldn't write to port " << output_port().name();
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os << ", error: " << fetch_errmsg( errno ) << "(" << errno << ")";
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cout << os.str() << endl;
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inactive_event();
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}
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}
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#ifdef PORT_DEBUG
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cout << "SurfacePort::wrote " << count << endl;
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#endif
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}
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void SurfacePort::write_sysex( const MidiByteArray & mba )
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{
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MidiByteArray buf;
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buf << sysex_hdr() << mba << MIDI::eox;
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write( buf );
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}
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void SurfacePort::write_sysex( MIDI::byte msg )
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{
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MidiByteArray buf;
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buf << sysex_hdr() << msg << MIDI::eox;
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write( buf );
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}
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ostream & Mackie::operator << ( ostream & os, const SurfacePort & port )
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{
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os << "{ ";
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os << "name: " << port.input_port().name() << " " << port.output_port().name();
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os << "; ";
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os << " }";
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return os;
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}
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