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/*
Copyright (C) 2006,2007 John Anderson
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 "surface_port.h"
#include "mackie_control_exception.h"
#include "controls.h"
#include <midi++/types.h>
#include <midi++/port.h>
#include <sigc++/sigc++.h>
#include <boost/shared_array.hpp>
#include "i18n.h"
#include <sstream>
#include <cstring>
#include <cerrno>
using namespace std;
using namespace Mackie;
SurfacePort::SurfacePort( MIDI::Port & port, int number )
: _port( port ), _number( number ), _active( false )
{
}
SurfacePort::~SurfacePort()
{
//cout << "~SurfacePort::SurfacePort()" << endl;
// make sure another thread isn't reading or writing as we close the port
Glib::RecMutex::Lock lock( _rwlock );
_active = false;
//cout << "~SurfacePort::SurfacePort() finished" << endl;
}
// wrapper for one day when strerror_r is working properly
string fetch_errmsg( int error_number )
{
char * msg = strerror( error_number );
return msg;
}
MidiByteArray SurfacePort::read()
{
const int max_buf_size = 512;
MIDI::byte buf[max_buf_size];
MidiByteArray retval;
// check active. Mainly so that the destructor
// doesn't destroy the mutex while it's still locked
if ( !active() ) return retval;
// return nothing read if the lock isn't acquired
#if 0
Glib::RecMutex::Lock lock( _rwlock, Glib::TRY_LOCK );
if ( !lock.locked() )
{
cout << "SurfacePort::read not locked" << endl;
return retval;
}
// check active again - destructor sequence
if ( !active() ) return retval;
#endif
// read port and copy to return value
int nread = port().read( buf, sizeof (buf) );
if (nread >= 0) {
retval.copy( nread, buf );
if ((size_t) nread == sizeof (buf))
{
#ifdef DEBUG
cout << "SurfacePort::read recursive" << endl;
#endif
retval << read();
}
}
else
{
if ( errno != EAGAIN )
{
ostringstream os;
os << "Surface: error reading from port: " << port().name();
os << ": " << errno << fetch_errmsg( errno );
cout << os.str() << endl;
inactive_event();
throw MackieControlException( os.str() );
}
}
#ifdef DEBUG
cout << "SurfacePort::read: " << retval << endl;
#endif
return retval;
}
void SurfacePort::write( const MidiByteArray & mba )
{
#ifdef DEBUG
//if ( mba[0] == 0xf0 ) cout << "SurfacePort::write: " << mba << endl;
cout << "SurfacePort::write: " << mba << endl;
#endif
// check active before and after lock - to make sure
// that the destructor doesn't destroy the mutex while
// it's still in use
if ( !active() ) return;
Glib::RecMutex::Lock lock( _rwlock );
if ( !active() ) return;
int count = port().write( mba.bytes().get(), mba.size() );
if ( count != (int)mba.size() )
{
if ( errno != EAGAIN )
{
ostringstream os;
os << "Surface: couldn't write to port " << port().name();
os << ": " << errno << fetch_errmsg( errno );
cout << os.str();
inactive_event();
throw MackieControlException( os.str() );
}
}
#ifdef DEBUG
cout << "SurfacePort::wrote " << count << endl;
#endif
}
void SurfacePort::write_sysex( const MidiByteArray & mba )
{
MidiByteArray buf;
buf << sysex_hdr() << mba << MIDI::eox;
write( buf );
}
void SurfacePort::write_sysex( MIDI::byte msg )
{
MidiByteArray buf;
buf << sysex_hdr() << msg << MIDI::eox;
write( buf );
}
// This should be moved to midi++ at some point
ostream & operator << ( ostream & os, const MIDI::Port & port )
{
os << "device: " << port.device();
os << "; ";
os << "name: " << port.name();
os << "; ";
os << "type: " << port.type();
os << "; ";
os << "mode: " << port.mode();
os << "; ";
os << "ok: " << port.ok();
os << "; ";
os << "number: " << port.number();
os << "; ";
return os;
}
ostream & Mackie::operator << ( ostream & os, const SurfacePort & port )
{
os << "{ ";
os << "device: " << port.port().device();
os << "; ";
os << "name: " << port.port().name();
os << "; ";
os << "number: " << port.number();
os << " }";
return os;
}
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