/*
- Copyright (C) 2002-4 Paul Davis
+ Copyright (C) 2002-4 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
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-
+#include <iostream>
#include <errno.h>
#include <poll.h>
#include <sys/types.h>
#include <unistd.h>
-#include <pbd/error.h>
-#include <pbd/failed_constructor.h>
-#include <pbd/pthread_utils.h>
+#include "pbd/error.h"
+#include "pbd/failed_constructor.h"
+#include "pbd/pthread_utils.h"
-#include <midi++/port.h>
-#include <ardour/slave.h>
-#include <ardour/session.h>
-#include <ardour/audioengine.h>
-#include <ardour/cycles.h>
+#include "midi++/port.h"
+#include "ardour/slave.h"
+#include "ardour/session.h"
+#include "ardour/audioengine.h"
+#include "ardour/cycles.h"
#include "i18n.h"
+using namespace std;
using namespace ARDOUR;
using namespace sigc;
using namespace MIDI;
using namespace PBD;
-MTC_Slave::MTC_Slave (Session& s, MIDI::Port& p)
+MTC_Slave::MTC_Slave (Session& s, MIDI::Port& p)
: session (s)
{
+ can_notify_on_unknown_rate = true;
+
+ last_mtc_fps_byte = session.get_mtc_timecode_bits ();
+
rebind (p);
reset ();
}
}
void
-MTC_Slave::update_mtc_qtr (Parser& p)
+MTC_Slave::update_mtc_qtr (Parser& /*p*/)
{
cycles_t cnow = get_cycles ();
nframes_t now = session.engine().frame_time();
nframes_t qtr;
static cycles_t last_qtr = 0;
- qtr = (long) (session.frames_per_smpte_frame() / 4);
+ qtr = (long) (session.frames_per_timecode_frame() / 4);
mtc_frame += qtr;
last_qtr = cnow;
MTC_Slave::update_mtc_time (const byte *msg, bool was_full)
{
nframes_t now = session.engine().frame_time();
- SMPTE::Time smpte;
-
- smpte.hours = msg[3];
- smpte.minutes = msg[2];
- smpte.seconds = msg[1];
- smpte.frames = msg[0];
-
- session.smpte_to_sample( smpte, mtc_frame, true, false );
-
+ Timecode::Time timecode;
+
+ timecode.hours = msg[3];
+ timecode.minutes = msg[2];
+ timecode.seconds = msg[1];
+ timecode.frames = msg[0];
+
+ last_mtc_fps_byte = msg[4];
+
+ switch (msg[4]) {
+ case MTC_24_FPS:
+ timecode.rate = 24;
+ timecode.drop = false;
+ can_notify_on_unknown_rate = true;
+ break;
+ case MTC_25_FPS:
+ timecode.rate = 25;
+ timecode.drop = false;
+ can_notify_on_unknown_rate = true;
+ break;
+ case MTC_30_FPS_DROP:
+ timecode.rate = 30;
+ timecode.drop = true;
+ can_notify_on_unknown_rate = true;
+ break;
+ case MTC_30_FPS:
+ timecode.rate = 30;
+ timecode.drop = false;
+ can_notify_on_unknown_rate = true;
+ break;
+ default:
+ /* throttle error messages about unknown MTC rates */
+ if (can_notify_on_unknown_rate) {
+ error << string_compose (_("Unknown rate/drop value %1 in incoming MTC stream, session values used instead"),
+ (int) msg[4])
+ << endmsg;
+ can_notify_on_unknown_rate = false;
+ }
+ timecode.rate = session.timecode_frames_per_second();
+ timecode.drop = session.timecode_drop_frames();
+ }
+
+ session.timecode_to_sample (timecode, mtc_frame, true, false);
+
if (was_full) {
-
- current.guard1++;
- current.position = mtc_frame;
- current.timestamp = 0;
- current.guard2++;
-
- session.request_locate (mtc_frame, false);
- update_mtc_status (MIDI::Parser::MTC_Stopped);
-
- reset ();
-
+
+ current.guard1++;
+ current.position = mtc_frame;
+ current.timestamp = 0;
+ current.guard2++;
+
+ session.request_locate (mtc_frame, false);
+ session.request_transport_speed (0);
+ update_mtc_status (MIDI::Parser::MTC_Stopped);
+
+ reset ();
+
} else {
-
+
/* We received the last quarter frame 7 quarter frames (1.75 mtc
frames) after the instance when the contents of the mtc quarter
frames were decided. Add time to compensate for the elapsed 1.75
frames.
- Also compensate for audio latency.
+ Also compensate for audio latency.
*/
- mtc_frame += (long) (1.75 * session.frames_per_smpte_frame()) + session.worst_output_latency();
-
+ mtc_frame += (long) (1.75 * session.frames_per_timecode_frame()) + session.worst_output_latency();
+
if (first_mtc_frame == 0) {
first_mtc_frame = mtc_frame;
first_mtc_time = now;
- }
-
+ }
+
current.guard1++;
current.position = mtc_frame;
current.timestamp = now;
current.guard2++;
}
-
+
last_inbound_frame = now;
}
void
MTC_Slave::handle_locate (const MIDI::byte* mmc_tc)
{
- MIDI::byte mtc[4];
-
+ MIDI::byte mtc[5];
+
+ mtc[4] = last_mtc_fps_byte;
mtc[3] = mmc_tc[0] & 0xf; /* hrs only */
mtc[2] = mmc_tc[1];
mtc[1] = mmc_tc[2];
return true;
}
-bool
-MTC_Slave::speed_and_position (float& speed, nframes_t& pos)
+bool
+MTC_Slave::speed_and_position (double& speed, nframes_t& pos)
{
nframes_t now = session.engine().frame_time();
SafeTime last;
nframes_t frame_rate;
nframes_t elapsed;
- float speed_now;
+ double speed_now;
read_current (&last);
pos = last.position;
return true;
}
-
+
/* no timecode for 1/4 second ? conclude that its stopped */
if (last_inbound_frame && now > last_inbound_frame && now - last_inbound_frame > session.frame_rate() / 4) {
mtc_speed = 0;
pos = last.position;
session.request_locate (pos, false);
+ session.request_transport_speed (0);
update_mtc_status (MIDI::Parser::MTC_Stopped);
reset();
return false;
frame_rate = session.frame_rate();
- speed_now = (float) ((last.position - first_mtc_frame) / (double) (now - first_mtc_time));
+ speed_now = (double) ((last.position - first_mtc_frame) / (double) (now - first_mtc_time));
accumulator[accumulator_index++] = speed_now;
}
if (have_first_accumulated_speed) {
- float total = 0;
+ double total = 0;
for (int32_t i = 0; i < accumulator_size; ++i) {
total += accumulator[i];
elapsed = 0;
} else {
-
+
/* scale elapsed time by the current MTC speed */
-
+
if (last.timestamp && (now > last.timestamp)) {
elapsed = (nframes_t) floor (mtc_speed * (now - last.timestamp));
} else {
return true;
}
-nframes_t
+ARDOUR::nframes_t
MTC_Slave::resolution() const
{
- return (nframes_t) session.frames_per_smpte_frame();
+ return (nframes_t) session.frames_per_timecode_frame();
}
void
be being updated as we call this. but this
supposed to be a realtime-safe call.
*/
-
+
port->input()->reset_mtc_state ();
-
+
last_inbound_frame = 0;
current.guard1++;
current.position = 0;
projects / ardour.git / blobdiff