diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
commit | 449aab3c465bbbf66d221fac3d7ea559f1720357 (patch) | |
tree | 6843cc40c88250a132acac701271f1504cd2df04 /libs/surfaces/mackie/mackie_control_protocol_poll.cc | |
parent | 9c0d7d72d70082a54f823cd44c0ccda5da64bb6f (diff) |
rollback to 3428, before the mysterious removal of libs/* at 3431/3432
git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'libs/surfaces/mackie/mackie_control_protocol_poll.cc')
-rw-r--r-- | libs/surfaces/mackie/mackie_control_protocol_poll.cc | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/libs/surfaces/mackie/mackie_control_protocol_poll.cc b/libs/surfaces/mackie/mackie_control_protocol_poll.cc new file mode 100644 index 0000000000..fa7134fa95 --- /dev/null +++ b/libs/surfaces/mackie/mackie_control_protocol_poll.cc @@ -0,0 +1,191 @@ +#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 "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(); +} |