diff options
Diffstat (limited to 'libs/ardour/session_midi.cc')
| -rw-r--r-- | libs/ardour/session_midi.cc | 1498 |
1 files changed, 1498 insertions, 0 deletions
diff --git a/libs/ardour/session_midi.cc b/libs/ardour/session_midi.cc new file mode 100644 index 0000000000..a8ed4bc0f7 --- /dev/null +++ b/libs/ardour/session_midi.cc @@ -0,0 +1,1498 @@ + +/* + Copyright (C) 1999-2002 Paul Davis + + 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. + + $Id$ +*/ + +#include <string> +#include <cmath> +#include <cerrno> +#include <unistd.h> +#include <fcntl.h> +#include <poll.h> + +#include <midi++/mmc.h> +#include <midi++/port.h> +#include <midi++/manager.h> +#include <pbd/error.h> +#include <pbd/lockmonitor.h> +#include <pbd/pthread_utils.h> + +#include <ardour/configuration.h> +#include <ardour/audioengine.h> +#include <ardour/session.h> +#include <ardour/audio_track.h> +#include <ardour/diskstream.h> +#include <ardour/slave.h> +#include <ardour/cycles.h> + +#include "i18n.h" + +using namespace std; +using namespace ARDOUR; +//using namespace sigc; +using namespace MIDI; + +MachineControl::CommandSignature MMC_CommandSignature; +MachineControl::ResponseSignature MMC_ResponseSignature; + +MultiAllocSingleReleasePool Session::MIDIRequest::pool ("midi", sizeof (Session::MIDIRequest), 256); + +int +Session::use_config_midi_ports () +{ + string port_name; + + if (default_mmc_port) { + set_mmc_port (default_mmc_port->name()); + } else { + set_mmc_port (""); + } + + if (default_mtc_port) { + set_mtc_port (default_mtc_port->name()); + } else { + set_mtc_port (""); + } + + if (default_midi_port) { + set_midi_port (default_midi_port->name()); + } else { + set_midi_port (""); + } + + return 0; +} + + +/*********************************************************************** + MTC, MMC, etc. +**********************************************************************/ + +void +Session::set_mmc_control (bool yn) +{ + if (mmc_control == yn) { + return; + } + + mmc_control = yn; + set_dirty(); + poke_midi_thread (); + + ControlChanged (MMCControl); /* EMIT SIGNAL */ +} + +void +Session::set_midi_control (bool yn) +{ + if (midi_control == yn) { + return; + } + + midi_control = yn; + set_dirty(); + poke_midi_thread (); + + if (_midi_port) { + LockMonitor lm (route_lock, __LINE__, __FILE__); + for (RouteList::iterator i = routes.begin(); i != routes.end(); ++i) { + (*i)->reset_midi_control (_midi_port, midi_control); + } + } + + ControlChanged (MidiControl); /* EMIT SIGNAL */ +} + +void +Session::set_send_mtc (bool yn) +{ + /* set the persistent option value regardless */ + + send_midi_timecode = yn; + set_dirty(); + + /* only set the internal flag if we have + a port. + */ + + if (_mtc_port == 0 || send_mtc == yn) { + return; + } + + send_mtc = yn; + ControlChanged (SendMTC); /* EMIT SIGNAL */ +} + +void +Session::set_send_mmc (bool yn) +{ + if (_mmc_port == 0) { + return; + } + + if (send_midi_machine_control == yn) { + return; + } + + /* only set the internal flag if we have + a port. + */ + + if (_mmc_port) { + send_mmc = yn; + } + + /* set the persistent option value regardless */ + + send_midi_machine_control = yn; + set_dirty(); + + ControlChanged (SendMMC); /* EMIT SIGNAL */ +} + +bool +Session::get_send_mtc () const +{ + return send_mtc; +} + +bool +Session::get_send_mmc () const +{ + return send_mmc; +} + +int +Session::set_mtc_port (string port_tag) +{ + MTC_Slave *ms; + + if (port_tag.length() == 0) { + + if (_slave && ((ms = dynamic_cast<MTC_Slave*> (_slave)) != 0)) { + error << _("Ardour is slaved to MTC - port cannot be reset") << endmsg; + return -1; + } + + if (_mtc_port == 0) { + return 0; + } + + _mtc_port = 0; + goto out; + } + + MIDI::Port* port; + + if ((port = MIDI::Manager::instance()->port (port_tag)) == 0) { + error << compose (_("unknown port %1 requested for MTC"), port_tag) << endl; + return -1; + } + + _mtc_port = port; + + if (_slave && ((ms = dynamic_cast<MTC_Slave*> (_slave)) != 0)) { + ms->rebind (*port); + } + + Config->set_mtc_port_name (port_tag); + + out: + MTC_PortChanged(); /* EMIT SIGNAL */ + change_midi_ports (); + set_dirty(); + return 0; +} + +int +Session::set_mmc_port (string port_tag) +{ + if (port_tag.length() == 0) { + if (_mmc_port == 0) { + return 0; + } + _mmc_port = 0; + goto out; + } + + MIDI::Port* port; + + if ((port = MIDI::Manager::instance()->port (port_tag)) == 0) { + return -1; + } + + _mmc_port = port; + + if (mmc) { + delete mmc; + } + + mmc = new MIDI::MachineControl (*_mmc_port, 1.0, + MMC_CommandSignature, + MMC_ResponseSignature); + + + mmc->Play.connect + (mem_fun (*this, &Session::mmc_deferred_play)); + mmc->DeferredPlay.connect + (mem_fun (*this, &Session::mmc_deferred_play)); + mmc->Stop.connect + (mem_fun (*this, &Session::mmc_stop)); + mmc->FastForward.connect + (mem_fun (*this, &Session::mmc_fast_forward)); + mmc->Rewind.connect + (mem_fun (*this, &Session::mmc_rewind)); + mmc->Pause.connect + (mem_fun (*this, &Session::mmc_pause)); + mmc->RecordPause.connect + (mem_fun (*this, &Session::mmc_record_pause)); + mmc->RecordStrobe.connect + (mem_fun (*this, &Session::mmc_record_strobe)); + mmc->RecordExit.connect + (mem_fun (*this, &Session::mmc_record_exit)); + mmc->Locate.connect + (mem_fun (*this, &Session::mmc_locate)); + mmc->Step.connect + (mem_fun (*this, &Session::mmc_step)); + mmc->Shuttle.connect + (mem_fun (*this, &Session::mmc_shuttle)); + mmc->TrackRecordStatusChange.connect + (mem_fun (*this, &Session::mmc_record_enable)); + + /* also handle MIDI SPP because its so common */ + + _mmc_port->input()->start.connect (mem_fun (*this, &Session::spp_start)); + _mmc_port->input()->contineu.connect (mem_fun (*this, &Session::spp_continue)); + _mmc_port->input()->stop.connect (mem_fun (*this, &Session::spp_stop)); + + Config->set_mmc_port_name (port_tag); + + out: + MMC_PortChanged(); /* EMIT SIGNAL */ + change_midi_ports (); + set_dirty(); + return 0; +} + +int +Session::set_midi_port (string port_tag) +{ + if (port_tag.length() == 0) { + if (_midi_port == 0) { + return 0; + } + _midi_port = 0; + goto out; + } + + MIDI::Port* port; + + if ((port = MIDI::Manager::instance()->port (port_tag)) == 0) { + return -1; + } + + _midi_port = port; + + Config->set_midi_port_name (port_tag); + + out: + MIDI_PortChanged(); /* EMIT SIGNAL */ + change_midi_ports (); + set_dirty(); + return 0; +} + +void +Session::set_trace_midi_input (bool yn, MIDI::Port* port) +{ + MIDI::Parser* input_parser; + + if (port) { + if ((input_parser = port->input()) != 0) { + input_parser->trace (yn, &cout, "input: "); + } + } else { + + if (_mmc_port) { + if ((input_parser = _mmc_port->input()) != 0) { + input_parser->trace (yn, &cout, "input: "); + } + } + + if (_mtc_port && _mtc_port != _mmc_port) { + if ((input_parser = _mtc_port->input()) != 0) { + input_parser->trace (yn, &cout, "input: "); + } + } + + if (_midi_port && _midi_port != _mmc_port && _midi_port != _mtc_port ) { + if ((input_parser = _midi_port->input()) != 0) { + input_parser->trace (yn, &cout, "input: "); + } + } + } + + Config->set_trace_midi_input (yn); +} + +void +Session::set_trace_midi_output (bool yn, MIDI::Port* port) +{ + MIDI::Parser* output_parser; + + if (port) { + if ((output_parser = port->output()) != 0) { + output_parser->trace (yn, &cout, "output: "); + } + } else { + if (_mmc_port) { + if ((output_parser = _mmc_port->output()) != 0) { + output_parser->trace (yn, &cout, "output: "); + } + } + + if (_mtc_port && _mtc_port != _mmc_port) { + if ((output_parser = _mtc_port->output()) != 0) { + output_parser->trace (yn, &cout, "output: "); + } + } + + if (_midi_port && _midi_port != _mmc_port && _midi_port != _mtc_port ) { + if ((output_parser = _midi_port->output()) != 0) { + output_parser->trace (yn, &cout, "output: "); + } + } + + } + + Config->set_trace_midi_output (yn); +} + +bool +Session::get_trace_midi_input(MIDI::Port *port) +{ + MIDI::Parser* input_parser; + if (port) { + if ((input_parser = port->input()) != 0) { + return input_parser->tracing(); + } + } + else { + if (_mmc_port) { + if ((input_parser = _mmc_port->input()) != 0) { + return input_parser->tracing(); + } + } + + if (_mtc_port) { + if ((input_parser = _mtc_port->input()) != 0) { + return input_parser->tracing(); + } + } + + if (_midi_port) { + if ((input_parser = _midi_port->input()) != 0) { + return input_parser->tracing(); + } + } + } + + return false; +} + +bool +Session::get_trace_midi_output(MIDI::Port *port) +{ + MIDI::Parser* output_parser; + if (port) { + if ((output_parser = port->output()) != 0) { + return output_parser->tracing(); + } + } + else { + if (_mmc_port) { + if ((output_parser = _mmc_port->output()) != 0) { + return output_parser->tracing(); + } + } + + if (_mtc_port) { + if ((output_parser = _mtc_port->output()) != 0) { + return output_parser->tracing(); + } + } + + if (_midi_port) { + if ((output_parser = _midi_port->output()) != 0) { + return output_parser->tracing(); + } + } + } + + return false; + +} + + +void +Session::set_midi_feedback (bool yn) +{ + if (_midi_port == 0) { + return; + } + + midi_feedback = yn; + set_dirty(); + + if (yn) { + /* make sure the feedback thread is alive */ + start_feedback (); + } else { + /* maybe put the feedback thread to sleep */ + stop_feedback (); + } + + ControlChanged (MidiFeedback); /* EMIT SIGNAL */ + + send_all_midi_feedback (); +} + +void +Session::send_all_midi_feedback () +{ + if (midi_feedback) { + // send out current state of all routes + LockMonitor lm (route_lock, __LINE__, __FILE__); + for (RouteList::iterator i = routes.begin(); i != routes.end(); ++i) { + (*i)->send_all_midi_feedback (); + } + } +} + +void +Session::setup_midi_control () +{ + outbound_mtc_smpte_frame = 0; + next_quarter_frame_to_send = -1; + + /* setup the MMC buffer */ + + mmc_buffer[0] = 0xf0; // SysEx + mmc_buffer[1] = 0x7f; // Real Time SysEx ID for MMC + mmc_buffer[2] = 0x7f; // "broadcast" device ID + mmc_buffer[3] = 0x6; // MCC + + /* Set up the qtr frame message */ + + mtc_msg[0] = 0xf1; + mtc_msg[2] = 0xf1; + mtc_msg[4] = 0xf1; + mtc_msg[6] = 0xf1; + mtc_msg[8] = 0xf1; + mtc_msg[10] = 0xf1; + mtc_msg[12] = 0xf1; + mtc_msg[14] = 0xf1; + + if (_mmc_port != 0) { + + send_mmc = send_midi_machine_control; + + } else { + + mmc = 0; + send_mmc = false; + } + + if (_mtc_port != 0) { + + send_mtc = send_midi_timecode; + + } else { + + send_mtc = false; + } +} + +int +Session::midi_read (MIDI::Port* port) +{ + MIDI::byte buf[512]; + + /* reading from the MIDI port activates the Parser + that in turn generates signals that we care + about. the port is already set to NONBLOCK so that + can read freely here. + */ + + while (1) { + + // cerr << "+++ READ ON " << port->name() << endl; + + int nread = port->read (buf, sizeof (buf)); + + // cerr << "-- READ (" << nread << " ON " << port->name() << endl; + + if (nread > 0) { + if ((size_t) nread < sizeof (buf)) { + break; + } else { + continue; + } + } else if (nread == 0) { + break; + } else if (errno == EAGAIN) { + break; + } else { + fatal << compose(_("Error reading from MIDI port %1"), port->name()) << endmsg; + /*NOTREACHED*/ + } + } + + return 0; +} + +void +Session::spp_start (Parser& ignored) +{ + if (mmc_control && (_slave_type != MTC)) { + request_transport_speed (1.0); + } +} + +void +Session::spp_continue (Parser& ignored) +{ + spp_start (ignored); +} + +void +Session::spp_stop (Parser& ignored) +{ + if (mmc_control) { + request_stop (); + } +} + +void +Session::mmc_deferred_play (MIDI::MachineControl &mmc) +{ + if (mmc_control && (_slave_type != MTC)) { + request_transport_speed (1.0); + } +} + +void +Session::mmc_record_pause (MIDI::MachineControl &mmc) +{ + if (mmc_control) { + maybe_enable_record(); + } +} + +void +Session::mmc_record_strobe (MIDI::MachineControl &mmc) +{ + if (!mmc_control) + return; + + /* record strobe does an implicit "Play" command */ + + if (_transport_speed != 1.0) { + + /* start_transport() will move from Enabled->Recording, so we + don't need to do anything here except enable recording. + its not the same as maybe_enable_record() though, because + that *can* switch to Recording, which we do not want. + */ + + save_state ("", true); + atomic_set (&_record_status, Enabled); + RecordEnabled (); /* EMIT SIGNAL */ + + request_transport_speed (1.0); + + } else { + + enable_record (); + } +} + +void +Session::mmc_record_exit (MIDI::MachineControl &mmc) +{ + if (mmc_control) { + disable_record (); + } +} + +void +Session::mmc_stop (MIDI::MachineControl &mmc) +{ + if (mmc_control) { + request_stop (); + } +} + +void +Session::mmc_pause (MIDI::MachineControl &mmc) +{ + if (mmc_control) { + + /* We support RECORD_PAUSE, so the spec says that + we must interpret PAUSE like RECORD_PAUSE if + recording. + */ + + if (actively_recording()) { + maybe_enable_record (); + } else { + request_stop (); + } + } +} + +static bool step_queued = false; + +void + +Session::mmc_step (MIDI::MachineControl &mmc, int steps) +{ + if (!mmc_control) { + return; + } + + struct timeval now; + struct timeval diff = { 0, 0 }; + + gettimeofday (&now, 0); + + timersub (&now, &last_mmc_step, &diff); + + gettimeofday (&now, 0); + timersub (&now, &last_mmc_step, &diff); + + if (last_mmc_step.tv_sec != 0 && (diff.tv_usec + (diff.tv_sec * 1000000)) < _engine.usecs_per_cycle()) { + return; + } + + double diff_secs = diff.tv_sec + (diff.tv_usec / 1000000.0); + double cur_speed = (((steps * 0.5) * smpte_frames_per_second) / diff_secs) / smpte_frames_per_second; + + if (_transport_speed == 0 || cur_speed * _transport_speed < 0) { + /* change direction */ + step_speed = cur_speed; + } else { + step_speed = (0.6 * step_speed) + (0.4 * cur_speed); + } + + step_speed *= 0.25; + +#if 0 + cerr << "delta = " << diff_secs + << " ct = " << _transport_speed + << " steps = " << steps + << " new speed = " << cur_speed + << " speed = " << step_speed + << endl; +#endif + + request_transport_speed (step_speed); + last_mmc_step = now; + + if (!step_queued) { + midi_timeouts.push_back (mem_fun (*this, &Session::mmc_step_timeout)); + step_queued = true; + } +} + +void +Session::mmc_rewind (MIDI::MachineControl &mmc) +{ + if (mmc_control) { + request_transport_speed(-8.0f); + } +} + +void +Session::mmc_fast_forward (MIDI::MachineControl &mmc) +{ + if (mmc_control) { + request_transport_speed(8.0f); + } +} + +void +Session::mmc_locate (MIDI::MachineControl &mmc, const MIDI::byte* mmc_tc) +{ + if (!mmc_control) { + return; + } + + jack_nframes_t target_frame; + SMPTE_Time smpte; + + smpte.hours = mmc_tc[0] & 0xf; + smpte.minutes = mmc_tc[1]; + smpte.seconds = mmc_tc[2]; + smpte.frames = mmc_tc[3]; + + // Also takes smpte offset into account: + smpte_to_sample( smpte, target_frame, true /* use_offset */, false /* use_subframes */ ); + + if (target_frame > max_frames) { + target_frame = max_frames; + } + + /* Some (all?) MTC/MMC devices do not send a full MTC frame + at the end of a locate, instead sending only an MMC + locate command. This causes the current position + of an MTC slave to become out of date. Catch this. + */ + + MTC_Slave* mtcs = dynamic_cast<MTC_Slave*> (_slave); + + if (mtcs != 0) { + // cerr << "Locate *with* MTC slave\n"; + mtcs->handle_locate (mmc_tc); + } else { + // cerr << "Locate without MTC slave\n"; + request_locate (target_frame, false); + } +} + +void +Session::mmc_shuttle (MIDI::MachineControl &mmc, float speed, bool forw) +{ + cerr << "MMC shuttle, speed = " << speed << endl; + + if (!mmc_control) { + return; + } + + if (shuttle_speed_threshold >= 0 && speed > shuttle_speed_threshold) { + speed *= shuttle_speed_factor; + } + + cerr << "requested MMC control speed = " << speed << endl; + + if (forw) { + request_transport_speed (speed); + } else { + request_transport_speed (-speed); + } +} + +void +Session::mmc_record_enable (MIDI::MachineControl &mmc, size_t trk, bool enabled) +{ + if (mmc_control) { + + /* don't take route or diskstream lock: if using dynamic punch, + this could cause a dropout. XXX is that really OK? + or should we queue a rec-enable request? + */ + + size_t n; + RouteList::iterator i; + + for (n = 0, i = routes.begin(); i != routes.end(); ++i) { + AudioTrack *at; + + if ((at = dynamic_cast<AudioTrack*>(*i)) != 0) { + if (n++ == trk) { + at->set_record_enable (enabled, &mmc); + break; + } + } + } + } +} + +void +Session::send_full_time_code_in_another_thread () +{ + send_time_code_in_another_thread (true); +} + +void +Session::send_midi_time_code_in_another_thread () +{ + send_time_code_in_another_thread (false); +} + +void +Session::send_time_code_in_another_thread (bool full) +{ + jack_nframes_t two_smpte_frames_duration; + jack_nframes_t quarter_frame_duration; + + /* Duration of two smpte frames */ + two_smpte_frames_duration = ((long) _frames_per_smpte_frame) << 1; + + /* Duration of one quarter frame */ + quarter_frame_duration = ((long) _frames_per_smpte_frame) >> 2; + + if (_transport_frame < (outbound_mtc_smpte_frame + (next_quarter_frame_to_send * quarter_frame_duration))) + { + /* There is no work to do. + We throttle this here so that we don't overload + the transport thread with requests. + */ + return; + } + + MIDIRequest* request = new MIDIRequest; + + if (full) { + request->type = MIDIRequest::SendFullMTC; + } else { + request->type = MIDIRequest::SendMTC; + } + + midi_requests.write (&request, 1); + poke_midi_thread (); +} + +void +Session::change_midi_ports () +{ + MIDIRequest* request = new MIDIRequest; + + request->type = MIDIRequest::PortChange; + midi_requests.write (&request, 1); + poke_midi_thread (); +} + +int +Session::send_full_time_code () + +{ + MIDI::byte msg[10]; + SMPTE_Time smpte; + + if (_mtc_port == 0 || !send_mtc) { + return 0; + } + + // Get smpte time for this transport frame + sample_to_smpte(_transport_frame, smpte, true /* use_offset */, false /* no subframes */); + + // Check for negative smpte time and prepare for quarter frame transmission + if (smpte.negative) { + // Negative mtc is not defined, so sync slave to smpte zero. + // When _transport_frame gets there we will start transmitting quarter frames + smpte.hours = 0; + smpte.minutes = 0; + smpte.seconds = 0; + smpte.frames = 0; + smpte.subframes = 0; + smpte.negative = false; + smpte_to_sample( smpte, outbound_mtc_smpte_frame, true, false ); + transmitting_smpte_time = smpte; + } else { + transmitting_smpte_time = smpte; + outbound_mtc_smpte_frame = _transport_frame; + if (((mtc_smpte_bits >> 5) != MIDI::MTC_25_FPS) && (transmitting_smpte_time.frames % 2)) { + // start MTC quarter frame transmission on an even frame + smpte_increment( transmitting_smpte_time ); + outbound_mtc_smpte_frame += (jack_nframes_t) _frames_per_smpte_frame; + } + } + + next_quarter_frame_to_send = 0; + + // Sync slave to the same smpte time as we are on (except if negative, see above) + msg[0] = 0xf0; + msg[1] = 0x7f; + msg[2] = 0x7f; + msg[3] = 0x1; + msg[4] = 0x1; + msg[9] = 0xf7; + + msg[5] = mtc_smpte_bits | smpte.hours; + msg[6] = smpte.minutes; + msg[7] = smpte.seconds; + msg[8] = smpte.frames; + + { + LockMonitor lm (midi_lock, __LINE__, __FILE__); + + if (_mtc_port->midimsg (msg, sizeof (msg))) { + error << _("Session: could not send full MIDI time code") << endmsg; + + return -1; + } + } + + return 0; +} + +int +Session::send_midi_time_code () +{ + if (_mtc_port == 0 || !send_mtc || transmitting_smpte_time.negative || (next_quarter_frame_to_send < 0) ) { + return 0; + } + + jack_nframes_t two_smpte_frames_duration; + jack_nframes_t quarter_frame_duration; + + /* Duration of two smpte frames */ + two_smpte_frames_duration = ((long) _frames_per_smpte_frame) << 1; + + /* Duration of one quarter frame */ + quarter_frame_duration = ((long) _frames_per_smpte_frame) >> 2; + + while (_transport_frame >= (outbound_mtc_smpte_frame + (next_quarter_frame_to_send * quarter_frame_duration))) { + + // Send quarter frames up to current time + { + LockMonitor lm (midi_lock, __LINE__, __FILE__); + + switch(next_quarter_frame_to_send) { + case 0: + mtc_msg[1] = 0x00 | (transmitting_smpte_time.frames & 0xf); + break; + case 1: + mtc_msg[1] = 0x10 | ((transmitting_smpte_time.frames & 0xf0) >> 4); + break; + case 2: + mtc_msg[1] = 0x20 | (transmitting_smpte_time.seconds & 0xf); + break; + case 3: + mtc_msg[1] = 0x30 | ((transmitting_smpte_time.seconds & 0xf0) >> 4); + break; + case 4: + mtc_msg[1] = 0x40 | (transmitting_smpte_time.minutes & 0xf); + break; + case 5: + mtc_msg[1] = 0x50 | ((transmitting_smpte_time.minutes & 0xf0) >> 4); + break; + case 6: + mtc_msg[1] = 0x60 | ((mtc_smpte_bits|transmitting_smpte_time.hours) & 0xf); + break; + case 7: + mtc_msg[1] = 0x70 | (((mtc_smpte_bits|transmitting_smpte_time.hours) & 0xf0) >> 4); + break; + } + + if (_mtc_port->midimsg (mtc_msg, 2)) { + error << compose(_("Session: cannot send quarter-frame MTC message (%1)"), strerror (errno)) + << endmsg; + + return -1; + } + + // cout << "smpte = " << transmitting_smpte_time.hours << ":" << transmitting_smpte_time.minutes << ":" << transmitting_smpte_time.seconds << ":" << transmitting_smpte_time.frames << ", qfm = " << next_quarter_frame_to_send << endl; + + // Increment quarter frame counter + next_quarter_frame_to_send++; + + if (next_quarter_frame_to_send >= 8) { + // Wrap quarter frame counter + next_quarter_frame_to_send = 0; + // Increment smpte time twice + smpte_increment( transmitting_smpte_time ); + smpte_increment( transmitting_smpte_time ); + // Re-calculate timing of first quarter frame + smpte_to_sample( transmitting_smpte_time, outbound_mtc_smpte_frame, true /* use_offset */, false ); + } + } + } + return 0; +} + +/*********************************************************************** + OUTBOUND MMC STUFF +**********************************************************************/ + +void +Session::send_mmc_in_another_thread (MIDI::MachineControl::Command cmd, jack_nframes_t target_frame) +{ + MIDIRequest* request; + + if (_mtc_port == 0 || !send_mmc) { + return; + } + + request = new MIDIRequest; + request->type = MIDIRequest::SendMMC; + request->mmc_cmd = cmd; + request->locate_frame = target_frame; + + midi_requests.write (&request, 1); + poke_midi_thread (); +} + +void +Session::deliver_mmc (MIDI::MachineControl::Command cmd, jack_nframes_t where) +{ + using namespace MIDI; + int nbytes = 4; + SMPTE_Time smpte; + + if (_mmc_port == 0 || !send_mmc) { + return; + } + + mmc_buffer[nbytes++] = cmd; + + // cerr << "delivering MMC, cmd = " << hex << (int) cmd << dec << endl; + + switch (cmd) { + case MachineControl::cmdLocate: + smpte_time_subframes (where, smpte); + + mmc_buffer[nbytes++] = 0x6; // byte count + mmc_buffer[nbytes++] = 0x1; // "TARGET" subcommand + mmc_buffer[nbytes++] = smpte.hours; + mmc_buffer[nbytes++] = smpte.minutes; + mmc_buffer[nbytes++] = smpte.seconds; + mmc_buffer[nbytes++] = smpte.frames; + mmc_buffer[nbytes++] = smpte.subframes; + break; + + case MachineControl::cmdStop: + break; + + case MachineControl::cmdPlay: + /* always convert Play into Deferred Play */ + mmc_buffer[4] = MachineControl::cmdDeferredPlay; + break; + + case MachineControl::cmdDeferredPlay: + break; + + case MachineControl::cmdRecordStrobe: + break; + + case MachineControl::cmdRecordExit: + break; + + case MachineControl::cmdRecordPause: + break; + + default: + nbytes = 0; + }; + + if (nbytes) { + + mmc_buffer[nbytes++] = 0xf7; // terminate SysEx/MMC message + + LockMonitor lm (midi_lock, __LINE__, __FILE__); + + if (_mmc_port->write (mmc_buffer, nbytes) != nbytes) { + error << compose(_("MMC: cannot send command %1%2%3"), &hex, cmd, &dec) << endmsg; + } + } +} + +bool +Session::mmc_step_timeout () +{ + struct timeval now; + struct timeval diff; + double diff_usecs; + gettimeofday (&now, 0); + + timersub (&now, &last_mmc_step, &diff); + diff_usecs = diff.tv_sec * 1000000 + diff.tv_usec; + + if (diff_usecs > 1000000.0 || fabs (_transport_speed) < 0.0000001) { + /* too long or too slow, stop transport */ + request_transport_speed (0.0); + step_queued = false; + return false; + } + + if (diff_usecs < 250000.0) { + /* too short, just keep going */ + return true; + } + + /* slow it down */ + + request_transport_speed (_transport_speed * 0.75); + return true; +} + + +void +Session::send_midi_message (MIDI::Port * port, MIDI::eventType ev, MIDI::channel_t ch, MIDI::EventTwoBytes data) +{ + // in another thread, really + + MIDIRequest* request = new MIDIRequest; + + request->type = MIDIRequest::SendMessage; + request->port = port; + request->ev = ev; + request->chan = ch; + request->data = data; + + midi_requests.write (&request, 1); + poke_midi_thread (); +} + +void +Session::deliver_midi (MIDI::Port * port, MIDI::byte* buf, int32_t bufsize) +{ + // in another thread, really + + MIDIRequest* request = new MIDIRequest; + + request->type = MIDIRequest::Deliver; + request->port = port; + request->buf = buf; + request->size = bufsize; + + midi_requests.write (&request, 1); + poke_midi_thread (); +} + +void +Session::deliver_midi_message (MIDI::Port * port, MIDI::eventType ev, MIDI::channel_t ch, MIDI::EventTwoBytes data) +{ + if (port == 0 || ev == MIDI::none) { + return; + } + + midi_msg[0] = (ev & 0xF0) | (ch & 0xF); + midi_msg[1] = data.controller_number; + midi_msg[2] = data.value; + + port->write (midi_msg, 3); +} + +void +Session::deliver_data (MIDI::Port * port, MIDI::byte* buf, int32_t size) +{ + if (port) { + port->write (buf, size); + } + + /* this is part of the semantics of the Deliver request */ + + delete [] buf; +} + +/*--------------------------------------------------------------------------- + MIDI THREAD + ---------------------------------------------------------------------------*/ + +int +Session::start_midi_thread () +{ + if (pipe (midi_request_pipe)) { + error << compose(_("Cannot create transport request signal pipe (%1)"), strerror (errno)) << endmsg; + return -1; + } + + if (fcntl (midi_request_pipe[0], F_SETFL, O_NONBLOCK)) { + error << compose(_("UI: cannot set O_NONBLOCK on " "signal read pipe (%1)"), strerror (errno)) << endmsg; + return -1; + } + + if (fcntl (midi_request_pipe[1], F_SETFL, O_NONBLOCK)) { + error << compose(_("UI: cannot set O_NONBLOCK on " "signal write pipe (%1)"), strerror (errno)) << endmsg; + return -1; + } + + if (pthread_create_and_store ("transport", &midi_thread, 0, _midi_thread_work, this)) { + error << _("Session: could not create transport thread") << endmsg; + return -1; + } + + // pthread_detach (midi_thread); + + return 0; +} + +void +Session::terminate_midi_thread () +{ + MIDIRequest* request = new MIDIRequest; + void* status; + + request->type = MIDIRequest::Quit; + + midi_requests.write (&request, 1); + poke_midi_thread (); + + pthread_join (midi_thread, &status); +} + +void +Session::poke_midi_thread () +{ + char c; + + if (write (midi_request_pipe[1], &c, 1) != 1) { + error << compose(_("cannot send signal to midi thread! (%1)"), strerror (errno)) << endmsg; + } +} + +void * +Session::_midi_thread_work (void* arg) +{ + pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0); + pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0); + + ((Session *) arg)->midi_thread_work (); + return 0; +} + +void +Session::midi_thread_work () +{ + MIDIRequest* request; + struct pollfd pfd[4]; + int nfds = 0; + int timeout; + int fds_ready; + struct sched_param rtparam; + int x; + bool restart; + vector<MIDI::Port*> ports; + + PBD::ThreadCreated (pthread_self(), X_("MIDI")); + + memset (&rtparam, 0, sizeof (rtparam)); + rtparam.sched_priority = 9; /* XXX should be relative to audio (JACK) thread */ + + if ((x = pthread_setschedparam (pthread_self(), SCHED_FIFO, &rtparam)) != 0) { + // do we care? not particularly. + } + + /* set up the port vector; 4 is the largest possible size for now */ + + ports.push_back (0); + ports.push_back (0); + ports.push_back (0); + ports.push_back (0); + + while (1) { + + nfds = 0; + + pfd[nfds].fd = midi_request_pipe[0]; + pfd[nfds].events = POLLIN|POLLHUP|POLLERR; + nfds++; + + /* if we are using MMC control, we obviously have to listen + on the appropriate port. + */ + + if (mmc_control && _mmc_port && _mmc_port->selectable() >= 0) { + pfd[nfds].fd = _mmc_port->selectable(); + pfd[nfds].events = POLLIN|POLLHUP|POLLERR; + ports[nfds] = _mmc_port; + nfds++; + } + + /* if MTC is being handled on a different port from MMC + or we are not handling MMC at all, poll + the relevant port. + */ + + if (_mtc_port && (_mtc_port != _mmc_port || !mmc_control) && _mtc_port->selectable() >= 0) { + pfd[nfds].fd = _mtc_port->selectable(); + pfd[nfds].events = POLLIN|POLLHUP|POLLERR; + ports[nfds] = _mtc_port; + nfds++; + } + + if (_midi_port && (_midi_port != _mmc_port || !mmc_control) && (_midi_port != _mtc_port) && _midi_port->selectable() >= 0) { + pfd[nfds].fd = _midi_port->selectable(); + pfd[nfds].events = POLLIN|POLLHUP|POLLERR; + ports[nfds] = _midi_port; + nfds++; + } + + if (!midi_timeouts.empty()) { + timeout = 100; /* 10msecs */ + } else { + timeout = -1; /* if there is no data, we don't care */ + } + + again: + // cerr << "MIDI poll on " << nfds << " for " << timeout << endl; + if (poll (pfd, nfds, timeout) < 0) { + if (errno == EINTR) { + /* gdb at work, perhaps */ + goto again; + } + + error << compose(_("MIDI thread poll failed (%1)"), strerror (errno)) << endmsg; + + break; + } + // cerr << "MIDI thread wakes at " << get_cycles () << endl; + + fds_ready = 0; + restart = false; + + /* check the transport request pipe */ + + if (pfd[0].revents & ~POLLIN) { + error << _("Error on transport thread request pipe") << endmsg; + break; + } + + if (pfd[0].revents & POLLIN) { + + char foo[16]; + + // cerr << "MIDI request FIFO ready\n"; + fds_ready++; + + /* empty the pipe of all current requests */ + + while (1) { + size_t nread = read (midi_request_pipe[0], &foo, sizeof (foo)); + + if (nread > 0) { + if ((size_t) nread < sizeof (foo)) { + break; + } else { + continue; + } + } else if (nread == 0) { + break; + } else if (errno == EAGAIN) { + break; + } else { + fatal << _("Error reading from transport request pipe") << endmsg; + /*NOTREACHED*/ + } + } + + while (midi_requests.read (&request, 1) == 1) { + + switch (request->type) { + + case MIDIRequest::SendFullMTC: + // cerr << "send full MTC\n"; + send_full_time_code (); + // cerr << "... done\n"; + break; + + case MIDIRequest::SendMTC: + // cerr << "send qtr MTC\n"; + send_midi_time_code (); + // cerr << "... done\n"; + break; + + case MIDIRequest::SendMMC: + // cerr << "send MMC\n"; + deliver_mmc (request->mmc_cmd, request->locate_frame); + // cerr << "... done\n"; + break; + + case MIDIRequest::SendMessage: + // cerr << "send Message\n"; + deliver_midi_message (request->port, request->ev, request->chan, request->data); + // cerr << "... done\n"; + break; + + case MIDIRequest::Deliver: + // cerr << "deliver\n"; + deliver_data (_midi_port, request->buf, request->size); + // cerr << "... done\n"; + break; + + case MIDIRequest::PortChange: + /* restart poll with new ports */ + // cerr << "rebind\n"; + restart = true; + break; + + case MIDIRequest::Quit: + delete request; + pthread_exit_pbd (0); + /*NOTREACHED*/ + break; + + default: + break; + } + + + delete request; + } + + } + + if (restart) { + continue; + } + + /* now read the rest of the ports */ + + for (int p = 1; p < nfds; ++p) { + if ((pfd[p].revents & ~POLLIN)) { + // error << compose(_("Transport: error polling MIDI port %1 (revents =%2%3%4"), p, &hex, pfd[p].revents, &dec) << endmsg; + break; + } + + if (pfd[p].revents & POLLIN) { + fds_ready++; + midi_read (ports[p]); + } + } + + /* timeout driven */ + + if (fds_ready < 2 && timeout != -1) { + + for (MidiTimeoutList::iterator i = midi_timeouts.begin(); i != midi_timeouts.end(); ) { + + MidiTimeoutList::iterator tmp; + tmp = i; + ++tmp; + + if (!(*i)) { + midi_timeouts.erase (i); + } + + i = tmp; + } + } + } +} + +bool +Session::get_mmc_control () const +{ + return mmc_control; +} +bool +Session::get_midi_feedback () const +{ + /* since this a "write" function we have to check the port as well + as the control toggle. + */ + return _midi_port && midi_feedback; +} +bool +Session::get_midi_control () const +{ + return midi_control; +} |