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Diffstat (limited to 'libs/ardour/session_midi.cc')
| -rw-r--r-- | libs/ardour/session_midi.cc | 1211 |
1 files changed, 0 insertions, 1211 deletions
diff --git a/libs/ardour/session_midi.cc b/libs/ardour/session_midi.cc deleted file mode 100644 index b4938636a2..0000000000 --- a/libs/ardour/session_midi.cc +++ /dev/null @@ -1,1211 +0,0 @@ - -/* - 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. - -*/ - -#include <string> -#include <cmath> -#include <cerrno> -#include <cassert> -#include <unistd.h> -#include <fcntl.h> -#include <poll.h> - -#include <boost/shared_ptr.hpp> - -#include <midi++/mmc.h> -#include <midi++/port.h> -#include <midi++/manager.h> -#include <pbd/error.h> -#include <glibmm/thread.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/midi_track.h> -#include <ardour/audio_diskstream.h> -#include <ardour/slave.h> -#include <ardour/cycles.h> -#include <ardour/smpte.h> - -#include "i18n.h" - -using namespace std; -using namespace ARDOUR; -using namespace PBD; -using namespace MIDI; - -MachineControl::CommandSignature MMC_CommandSignature; -MachineControl::ResponseSignature MMC_ResponseSignature; - - -void -Session::midi_panic() -{ - { - boost::shared_ptr<RouteList> r = routes.reader (); - - for (RouteList::iterator i = r->begin(); i != r->end(); ++i) { - MidiTrack *track = dynamic_cast<MidiTrack*>((*i).get()); - if (track != 0) { - track->midi_panic(); - } - } - } -} - -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. -**********************************************************************/ - -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 << string_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; -} - -void -Session::set_mmc_receive_device_id (uint32_t device_id) -{ - if (mmc) { - mmc->set_receive_device_id (device_id); - } -} - -void -Session::set_mmc_send_device_id (uint32_t device_id) -{ - if (mmc) { - mmc->set_send_device_id (device_id); - } -} - -int -Session::set_mmc_port (string port_tag) -{ - MIDI::byte old_recv_device_id = 0; - MIDI::byte old_send_device_id = 0; - bool reset_id = false; - - 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) { - old_recv_device_id = mmc->receive_device_id(); - old_recv_device_id = mmc->send_device_id(); - reset_id = true; - delete mmc; - } - - mmc = new MIDI::MachineControl (*_mmc_port, 1.0, - MMC_CommandSignature, - MMC_ResponseSignature); - - if (reset_id) { - mmc->set_receive_device_id (old_recv_device_id); - mmc->set_send_device_id (old_send_device_id); - } - - 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 0 - 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; - - /* XXX need something to forward this to control protocols ? or just - use the signal below - */ - - Config->set_midi_port_name (port_tag); - - out: -#endif - 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::setup_midi_control () -{ - outbound_mtc_smpte_frame = 0; - next_quarter_frame_to_send = 0; - - /* setup the MMC buffer */ - - mmc_buffer[0] = 0xf0; // SysEx - mmc_buffer[1] = 0x7f; // Real Time SysEx ID for MMC - mmc_buffer[2] = (mmc ? mmc->send_device_id() : 0x7f); - 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; -} - -void -Session::spp_start (Parser& ignored) -{ - if (Config->get_mmc_control() && (Config->get_slave_source() != MTC)) { - request_transport_speed (1.0); - } -} - -void -Session::spp_continue (Parser& ignored) -{ - spp_start (ignored); -} - -void -Session::spp_stop (Parser& ignored) -{ - if (Config->get_mmc_control()) { - request_stop (); - } -} - -void -Session::mmc_deferred_play (MIDI::MachineControl &mmc) -{ - if (Config->get_mmc_control() && (Config->get_slave_source() != MTC)) { - request_transport_speed (1.0); - } -} - -void -Session::mmc_record_pause (MIDI::MachineControl &mmc) -{ - if (Config->get_mmc_control()) { - maybe_enable_record(); - } -} - -void -Session::mmc_record_strobe (MIDI::MachineControl &mmc) -{ - if (!Config->get_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); - g_atomic_int_set (&_record_status, Enabled); - RecordStateChanged (); /* EMIT SIGNAL */ - - request_transport_speed (1.0); - - } else { - - enable_record (); - } -} - -void -Session::mmc_record_exit (MIDI::MachineControl &mmc) -{ - if (Config->get_mmc_control()) { - disable_record (false); - } -} - -void -Session::mmc_stop (MIDI::MachineControl &mmc) -{ - if (Config->get_mmc_control()) { - request_stop (); - } -} - -void -Session::mmc_pause (MIDI::MachineControl &mmc) -{ - if (Config->get_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 (!Config->get_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 (Config->get_mmc_control()) { - request_transport_speed(-8.0f); - } -} - -void -Session::mmc_fast_forward (MIDI::MachineControl &mmc) -{ - if (Config->get_mmc_control()) { - request_transport_speed(8.0f); - } -} - -void -Session::mmc_locate (MIDI::MachineControl &mmc, const MIDI::byte* mmc_tc) -{ - if (!Config->get_mmc_control()) { - return; - } - - 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]; - smpte.rate = smpte_frames_per_second(); - smpte.drop = smpte_drop_frames(); - - // 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) -{ - if (!Config->get_mmc_control()) { - return; - } - - if (Config->get_shuttle_speed_threshold() >= 0 && speed > Config->get_shuttle_speed_threshold()) { - speed *= Config->get_shuttle_speed_factor(); - } - - 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 (Config->get_mmc_control()) { - - RouteList::iterator i; - boost::shared_ptr<RouteList> r = routes.reader(); - - for (i = r->begin(); i != r->end(); ++i) { - AudioTrack *at; - - if ((at = dynamic_cast<AudioTrack*>((*i).get())) != 0) { - if (trk == at->remote_control_id()) { - at->set_record_enable (enabled, &mmc); - break; - } - } - } - } -} - -void -Session::change_midi_ports () -{ - MIDIRequest* request = new MIDIRequest; - - request->type = MIDIRequest::PortChange; - midi_requests.write (&request, 1); - poke_midi_thread (); -} - -/** Send MTC Full Frame message (complete SMPTE time) for the start of this cycle. - * This resets the MTC code, the next quarter frame message that is sent will be - * the first one with the beginning of this cycle as the new start point. - */ - -int -Session::send_full_time_code(nframes_t nframes) -{ - /* This function could easily send at a given frame offset, but would - * that be useful? Does ardour do sub-block accurate locating? [DR] */ - - MIDI::byte msg[10]; - SMPTE::Time smpte; - - _send_smpte_update = false; - - if (_mtc_port == 0 || !session_send_mtc) { - return 0; - } - - // Get smpte time for this transport frame - sample_to_smpte(_transport_frame, smpte, true /* use_offset */, false /* no subframes */); - - transmitting_smpte_time = smpte; - outbound_mtc_smpte_frame = _transport_frame; - - // I don't understand this bit yet.. [DR] - 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 += (nframes_t) _frames_per_smpte_frame; - } - - // Compensate for audio latency - outbound_mtc_smpte_frame += _worst_output_latency; - - next_quarter_frame_to_send = 0; - - // Sync slave to the same SMPTE time as we are on - 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; - - cerr << "MTC: Sending full time code at " << outbound_mtc_smpte_frame << endl; - - // Send message at offset 0, sent time is for the start of this cycle - if (_mtc_port->midimsg (msg, sizeof (msg), 0)) { - error << _("Session: could not send full MIDI time code") << endmsg; - return -1; - } - - return 0; -} - - -/** Sends MTC (quarter-frame) messages for this cycle. - * Must be called exactly once per cycle from the audio thread. Realtime safe. - * This function assumes the state of full SMPTE is sane, eg. the slave is - * expecting quarter frame messages and has the right frame of reference (any - * full MTC SMPTE time messages that needed to be sent should have been sent - * earlier already this cycle by send_full_time_code) - */ -int -Session::send_midi_time_code_for_cycle(nframes_t nframes) -{ - assert (next_quarter_frame_to_send >= 0); - assert (next_quarter_frame_to_send <= 7); - - if (_mtc_port == 0 || !session_send_mtc || transmitting_smpte_time.negative - /*|| (next_quarter_frame_to_send < 0)*/ ) { - // cerr << "(MTC) Not sending MTC\n"; - return 0; - } - - /* Duration of one quarter frame */ - nframes_t quarter_frame_duration = ((long) _frames_per_smpte_frame) >> 2; - - // cerr << "(MTC) TR: " << _transport_frame << " - SF: " << outbound_mtc_smpte_frame - // << " - NQ: " << next_quarter_frame_to_send << " - FD" << quarter_frame_duration << endl; - - // FIXME: this should always be true - //assert((outbound_mtc_smpte_frame + (next_quarter_frame_to_send * quarter_frame_duration)) - // > _transport_frame); - - - // Send quarter frames for this cycle - while (_transport_frame + nframes > (outbound_mtc_smpte_frame + - (next_quarter_frame_to_send * quarter_frame_duration))) { - - // cerr << "(MTC) Next frame to send: " << next_quarter_frame_to_send << endl; - - 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; - } - - const nframes_t msg_time = (outbound_mtc_smpte_frame - + (quarter_frame_duration * next_quarter_frame_to_send)); - - // This message must fall within this block or something is broken - assert(msg_time >= _transport_frame); - assert(msg_time < _transport_frame + nframes); - - nframes_t out_stamp = msg_time - _transport_frame; - assert(out_stamp < nframes); - - if (_mtc_port->midimsg (mtc_msg, 2, out_stamp)) { - error << string_compose(_("Session: cannot send quarter-frame MTC message (%1)"), strerror (errno)) - << endmsg; - return -1; - } - - /*cerr << "(MTC) SMPTE: " << transmitting_smpte_time.hours - << ":" << transmitting_smpte_time.minutes - << ":" << transmitting_smpte_time.seconds - << ":" << transmitting_smpte_time.frames - << ", qfm = " << next_quarter_frame_to_send - << ", stamp = " << out_stamp - << ", delta = " << _transport_frame + out_stamp - last_time << 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 ); - outbound_mtc_smpte_frame += 8 * quarter_frame_duration; - // Compensate for audio latency - outbound_mtc_smpte_frame += _worst_output_latency; - } - } - - return 0; -} - -/*********************************************************************** - OUTBOUND MMC STUFF -**********************************************************************/ - -void -Session::deliver_mmc (MIDI::MachineControl::Command cmd, nframes_t where) -{ - using namespace MIDI; - int nbytes = 4; - SMPTE::Time smpte; - - if (_mmc_port == 0 || !session_send_mmc) { - // cerr << "Not delivering MMC " << _mmc_port << " - " << session_send_mmc << endl; - 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 */ - /* Why? [DR] */ - 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 - - if (_mmc_port->midimsg (mmc_buffer, nbytes, 0)) { - error << string_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; -} - -/*--------------------------------------------------------------------------- - MIDI THREAD - ---------------------------------------------------------------------------*/ - -int -Session::start_midi_thread () -{ - if (pipe (midi_request_pipe)) { - error << string_compose(_("Cannot create transport request signal pipe (%1)"), strerror (errno)) << endmsg; - return -1; - } - - if (fcntl (midi_request_pipe[0], F_SETFL, O_NONBLOCK)) { - error << string_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 << string_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; - } - - return 0; -} - -void -Session::terminate_midi_thread () -{ - if (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 () -{ - static char c = 0; - - if (write (midi_request_pipe[1], &c, 1) != 1) { - error << string_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::ThreadCreatedWithRequestSize (pthread_self(), X_("MIDI"), 2048); - - 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.assign (4, (MIDI::Port*) 0); - - while (1) { - - nfds = 0; - - pfd[nfds].fd = midi_request_pipe[0]; - pfd[nfds].events = POLLIN|POLLHUP|POLLERR; - nfds++; - - if (Config->get_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 || !Config->get_mmc_control()) && _mtc_port->selectable() >= 0) { - pfd[nfds].fd = _mtc_port->selectable(); - pfd[nfds].events = POLLIN|POLLHUP|POLLERR; - ports[nfds] = _mtc_port; - nfds++; - } - - /* if we are using MMC control, we obviously have to listen - the relevant port. - */ - - if (_midi_port && (_midi_port != _mmc_port || !Config->get_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 << string_compose(_("MIDI thread poll failed (%1)"), strerror (errno)) << endmsg; - - break; - } - // cerr << "MIDI thread wakes at " << get_cycles () << endl; - - fds_ready = 0; - - /* 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::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 << string_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++; - ports[p]->parse (); - } - } - - /* 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; - } - } - } -} - |