#include <string>
#include <cmath>
#include <cerrno>
+#include <cassert>
#include <unistd.h>
#include <fcntl.h>
#include <poll.h>
#include <ardour/audio_diskstream.h>
#include <ardour/slave.h>
#include <ardour/cycles.h>
+#include <ardour/smpte.h>
#include "i18n.h"
MachineControl::CommandSignature MMC_CommandSignature;
MachineControl::ResponseSignature MMC_ResponseSignature;
-MultiAllocSingleReleasePool Session::MIDIRequest::pool ("midi", sizeof (Session::MIDIRequest), 1024);
-
int
Session::use_config_midi_ports ()
{
}
void
-Session::set_mmc_device_id (uint32_t device_id)
+Session::set_mmc_receive_device_id (uint32_t device_id)
{
if (mmc) {
- mmc->set_device_id (device_id);
+ 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_device_id = 0;
+ MIDI::byte old_recv_device_id = 0;
+ MIDI::byte old_send_device_id = 0;
bool reset_id = false;
if (port_tag.length() == 0) {
_mmc_port = port;
if (mmc) {
- old_device_id = mmc->device_id();
+ old_recv_device_id = mmc->receive_device_id();
+ old_recv_device_id = mmc->send_device_id();
reset_id = true;
delete mmc;
}
MMC_ResponseSignature);
if (reset_id) {
- mmc->set_device_id (old_device_id);
+ mmc->set_receive_device_id (old_recv_device_id);
+ mmc->set_send_device_id (old_send_device_id);
}
mmc->Play.connect
int
Session::set_midi_port (string port_tag)
{
+#if 0
if (port_tag.length() == 0) {
if (_midi_port == 0) {
return 0;
Config->set_midi_port_name (port_tag);
out:
+#endif
MIDI_PortChanged(); /* EMIT SIGNAL */
change_midi_ports ();
set_dirty();
Session::setup_midi_control ()
{
outbound_mtc_smpte_frame = 0;
- next_quarter_frame_to_send = -1;
+ 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] = 0x7f; // "broadcast" device ID
+ mmc_buffer[2] = (mmc ? mmc->send_device_id() : 0x7f);
mmc_buffer[3] = 0x6; // MCC
/* Set up the qtr frame message */
mtc_msg[14] = 0xf1;
}
-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 << string_compose(_("Error reading from MIDI port %1"), port->name()) << endmsg;
- /*NOTREACHED*/
- }
- }
-
- return 0;
-}
-
void
Session::spp_start (Parser& ignored)
{
}
}
-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)
-{
- nframes_t two_smpte_frames_duration;
- 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 ()
{
poke_midi_thread ();
}
-int
-Session::send_full_time_code ()
+/** 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 */);
- // 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 += (nframes_t) _frames_per_smpte_frame;
- }
+ 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
next_quarter_frame_to_send = 0;
- // Sync slave to the same smpte time as we are on (except if negative, see above)
+ // Sync slave to the same SMPTE time as we are on
msg[0] = 0xf0;
msg[1] = 0x7f;
msg[2] = 0x7f;
msg[7] = smpte.seconds;
msg[8] = smpte.frames;
- {
- Glib::Mutex::Lock lm (midi_lock);
-
- if (_mtc_port->midimsg (msg, sizeof (msg))) {
- error << _("Session: could not send full MIDI time code") << endmsg;
-
- return -1;
- }
+ 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 ()
-{
- if (_mtc_port == 0 || !session_send_mtc || transmitting_smpte_time.negative || (next_quarter_frame_to_send < 0) ) {
+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;
}
-
- nframes_t two_smpte_frames_duration;
- 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))) {
+ 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 up to current time
- {
- Glib::Mutex::Lock lm (midi_lock);
+
+ // 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) {
+ switch (next_quarter_frame_to_send) {
case 0:
mtc_msg[1] = 0x00 | (transmitting_smpte_time.frames & 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 << string_compose(_("Session: cannot send quarter-frame MTC message (%1)"), strerror (errno))
- << endmsg;
-
- return -1;
- }
+ }
+
+ 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);
- // 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 );
- // Compensate for audio latency
- outbound_mtc_smpte_frame += _worst_output_latency;
- }
+ 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::send_mmc_in_another_thread (MIDI::MachineControl::Command cmd, nframes_t target_frame)
-{
- MIDIRequest* request;
-
- if (_mtc_port == 0 || !session_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 ();
-}
-
+/** Send an MMC command at the given absolute timestamp (@a where).
+ *
+ * This must be called in the process thread, and @a where must fall within
+ * this process cycle or horrible things will happen.
+ */
void
Session::deliver_mmc (MIDI::MachineControl::Command cmd, nframes_t where)
{
SMPTE::Time smpte;
if (_mmc_port == 0 || !session_send_mmc) {
+ //cerr << "Not delivering MMC " << _mmc_port << " - " << send_mmc << endl;
return;
}
mmc_buffer[nbytes++] = cmd;
- // cerr << "delivering MMC, cmd = " << hex << (int) cmd << dec << endl;
+ //cerr << "delivering MMC, cmd = " << hex << (int) cmd << dec << endl;
switch (cmd) {
case MachineControl::cmdLocate:
case MachineControl::cmdPlay:
/* always convert Play into Deferred Play */
+ /* Why? [DR] */
mmc_buffer[4] = MachineControl::cmdDeferredPlay;
break;
mmc_buffer[nbytes++] = 0xf7; // terminate SysEx/MMC message
- Glib::Mutex::Lock lm (midi_lock);
+ assert(where >= _transport_frame);
- if (_mmc_port->write (mmc_buffer, nbytes) != nbytes) {
+ if (!_mmc_port->midimsg (mmc_buffer, sizeof (mmc_buffer), 0)) {
error << string_compose(_("MMC: cannot send command %1%2%3"), &hex, cmd, &dec) << endmsg;
- }
+ } /*else {
+ cerr << "Sending MMC\n";
+ }*/
}
}
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
---------------------------------------------------------------------------*/
return -1;
}
- // pthread_detach (midi_thread);
-
return 0;
}
Session::terminate_midi_thread ()
{
if (midi_thread) {
+
MIDIRequest* request = new MIDIRequest;
void* status;
midi_requests.write (&request, 1);
poke_midi_thread ();
-
+
pthread_join (midi_thread, &status);
}
}
/* 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);
+ ports.assign (4, (MIDI::Port*) 0);
while (1) {
pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
nfds++;
- /* if we are using MMC control, we obviously have to listen
- on the appropriate port.
- */
-
if (Config->get_mmc_control() && _mmc_port && _mmc_port->selectable() >= 0) {
pfd[nfds].fd = _mmc_port->selectable();
pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
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;
// cerr << "MIDI thread wakes at " << get_cycles () << endl;
fds_ready = 0;
- restart = false;
/* check the transport request pipe */
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";
if (pfd[p].revents & POLLIN) {
fds_ready++;
- midi_read (ports[p]);
+ ports[p]->parse ();
}
}
projects / ardour.git / blobdiff