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#include "mackie_control_protocol.h"
#include "midi_byte_array.h"
#include "surface_port.h"
#include <pbd/pthread_utils.h>
#include <pbd/error.h>
#include <midi++/types.h>
#include <midi++/port.h>
#include <midi++/manager.h>
#include <midi++/port_request.h>
#include "i18n.h"
#include <unistd.h>
#include <fcntl.h>
#include <poll.h>
#include <errno.h>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
using namespace Mackie;
using namespace PBD;
const char * MackieControlProtocol::default_port_name = "mcu";
bool MackieControlProtocol::probe()
{
return MIDI::Manager::instance()->port( default_port_name ) != 0;
}
void * MackieControlProtocol::monitor_work()
{
// What does ThreadCreatedWithRequestSize do?
PBD::ThreadCreated (pthread_self(), X_("Mackie"));
pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0);
pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
// read from midi ports
while ( _polling )
{
try
{
if ( poll_ports() )
{
try { read_ports(); }
catch ( exception & e ) {
cout << "MackieControlProtocol::poll_ports caught exception: " << e.what() << endl;
_ports_changed = true;
update_ports();
}
}
// poll for automation data from the routes
poll_automation();
}
catch ( exception & e )
{
cout << "caught exception in MackieControlProtocol::monitor_work " << e.what() << endl;
}
}
// TODO ports and pfd and nfds should be in a separate class
delete[] pfd;
pfd = 0;
nfds = 0;
return (void*) 0;
}
void MackieControlProtocol::update_ports()
{
if ( _ports_changed )
{
Glib::Mutex::Lock ul( update_mutex );
// yes, this is a double-test locking paradigm, or whatever it's called
// because we don't *always* need to acquire the lock for the first test
if ( _ports_changed )
{
// create new pollfd structures
if ( pfd != 0 ) delete[] pfd;
// TODO This might be a memory leak. How does thread cancellation cleanup work?
pfd = new pollfd[_ports.size()];
nfds = 0;
for( MackiePorts::iterator it = _ports.begin(); it != _ports.end(); ++it )
{
cout << "adding port " << (*it)->port().name() << " to pollfd" << endl;
pfd[nfds].fd = (*it)->port().selectable();
pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
++nfds;
}
_ports_changed = false;
}
update_cond.signal();
}
}
void MackieControlProtocol::read_ports()
{
/* now read any data on the ports */
Glib::Mutex::Lock lock( update_mutex );
for ( int p = 0; p < nfds; ++p )
{
// this will cause handle_midi_any in the MackiePort to be triggered
if ( pfd[p].revents & POLLIN > 0 )
{
// avoid deadlocking?
// doesn't seem to make a difference
//lock.release();
_ports[p]->read();
//lock.acquire();
}
}
}
bool MackieControlProtocol::poll_ports()
{
int timeout = 10; // milliseconds
int no_ports_sleep = 1000; // milliseconds
Glib::Mutex::Lock lock( update_mutex );
// if there are no ports
if ( nfds < 1 )
{
lock.release();
cout << "poll_ports no ports" << endl;
usleep( no_ports_sleep * 1000 );
return false;
}
int retval = poll( pfd, nfds, timeout );
if ( retval < 0 )
{
// gdb at work, perhaps
if ( errno != EINTR )
{
error << string_compose(_("Mackie MIDI thread poll failed (%1)"), strerror( errno ) ) << endmsg;
}
return false;
}
return retval > 0;
}
void MackieControlProtocol::handle_port_inactive( SurfacePort * port )
{
// port gone away. So stop polling it ASAP
{
// delete the port instance
Glib::Mutex::Lock lock( update_mutex );
MackiePorts::iterator it = find( _ports.begin(), _ports.end(), port );
if ( it != _ports.end() )
{
delete *it;
_ports.erase( it );
}
}
_ports_changed = true;
update_ports();
// TODO all the rebuilding of surfaces and so on
}
void MackieControlProtocol::handle_port_active( SurfacePort * port )
{
// no need to re-add port because it was already added
// during the init phase. So just update the local surface
// representation and send the representation to
// all existing ports
// TODO update bank size
// TODO rebuild surface, to have new units
// finally update session state to the surface
// TODO but this is also done in set_active, and
// in fact update_surface won't execute unless
// _active == true
cout << "update_surface in handle_port_active" << endl;
update_surface();
}
void MackieControlProtocol::handle_port_init( Mackie::SurfacePort * sport )
{
cout << "MackieControlProtocol::handle_port_init" << endl;
_ports_changed = true;
update_ports();
}
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