#include <poll.h>
#include <sys/types.h>
#include <unistd.h>
+
#include "pbd/error.h"
#include "pbd/enumwriter.h"
#include "pbd/failed_constructor.h"
using namespace std;
using namespace ARDOUR;
-using namespace sigc;
using namespace MIDI;
using namespace PBD;
+/* length (in timecode frames) of the "window" that we consider legal given receipt of
+ a given timecode position. Ardour will try to chase within this window, and will
+ stop+locate+wait+chase if timecode arrives outside of it. The window extends entirely
+ in the current direction of motion, so if any timecode arrives that is before the most
+ recently received position (and without the direction of timecode reversing too), we
+ will stop+locate+wait+chase.
+*/
+
+const int MTC_Slave::frame_tolerance = 2;
+
MTC_Slave::MTC_Slave (Session& s, MIDI::Port& p)
: session (s)
{
can_notify_on_unknown_rate = true;
did_reset_tc_format = false;
+ reset_pending = 0;
+ reset_position = false;
- pic = new PIController (1.0, 8);
+ pic = new PIChaser();
last_mtc_fps_byte = session.get_mtc_timecode_bits ();
mtc_frame = 0;
speed_accumulator = new double[speed_accumulator_size];
rebind (p);
- reset ();
+ reset (true);
}
MTC_Slave::~MTC_Slave()
if (did_reset_tc_format) {
session.config.set_timecode_format (saved_tc_format);
}
+
delete pic;
delete [] speed_accumulator;
}
void
MTC_Slave::rebind (MIDI::Port& p)
{
- for (vector<sigc::connection>::iterator i = connections.begin(); i != connections.end(); ++i) {
- (*i).disconnect ();
- }
-
+ port_connections.drop_connections ();
+
port = &p;
-
- cerr << "Bind to port MTC messages\n";
-
- connections.push_back (port->input()->mtc_time.connect (mem_fun (*this, &MTC_Slave::update_mtc_time)));
- connections.push_back (port->input()->mtc_qtr.connect (mem_fun (*this, &MTC_Slave::update_mtc_qtr)));
- connections.push_back (port->input()->mtc_status.connect (mem_fun (*this, &MTC_Slave::update_mtc_status)));
+
+ port->parser()->mtc_time.connect_same_thread (port_connections, boost::bind (&MTC_Slave::update_mtc_time, this, _1, _2, _3));
+ port->parser()->mtc_qtr.connect_same_thread (port_connections, boost::bind (&MTC_Slave::update_mtc_qtr, this, _1, _2, _3));
+ port->parser()->mtc_status.connect_same_thread (port_connections, boost::bind (&MTC_Slave::update_mtc_status, this, _1));
}
void
-MTC_Slave::update_mtc_qtr (Parser& /*p*/, int which_qtr, nframes_t now)
+MTC_Slave::update_mtc_qtr (Parser& /*p*/, int which_qtr, framepos_t now)
{
DEBUG_TRACE (DEBUG::MTC, string_compose ("qtr frame %1 at %2\n", which_qtr, now));
+ maybe_reset ();
last_inbound_frame = now;
}
void
-MTC_Slave::update_mtc_time (const byte *msg, bool was_full, nframes_t now)
+MTC_Slave::update_mtc_time (const byte *msg, bool was_full, framepos_t now)
{
/* "now" can be zero if this is called from a context where we do not have or do not want
- to use a timestamp indicating when this MTC time was received.
+ to use a timestamp indicating when this MTC time was received. example: when we received
+ a locate command via MMC.
*/
+ if (now) {
+ maybe_reset ();
+ }
+
Timecode::Time timecode;
TimecodeFormat tc_format;
bool reset_tc = true;
- nframes64_t window_root = -1;
+ framepos_t window_root = -1;
DEBUG_TRACE (DEBUG::MTC, string_compose ("full mtc time known at %1, full ? %2\n", now, was_full));
DEBUG_TRACE (DEBUG::MTC, string_compose ("MTC time timestamp = %1 TC %2 = frame %3 (from full message ? %4)\n",
now, timecode, mtc_frame, was_full));
-
+
if (was_full || outside_window (mtc_frame)) {
session.timecode_to_sample (timecode, mtc_frame, true, false);
session.request_locate (mtc_frame, false);
session.request_transport_speed (0);
update_mtc_status (MIDI::MTC_Stopped);
- window_root = mtc_frame;
-
- reset ();
+ reset (false);
+ reset_window (mtc_frame);
} else {
*
* its not the average, but we will assign it to current.speed below
*/
+
+ static framepos_t last_seen_timestamp = 0;
+ static framepos_t last_seen_position = 0;
+
+ if ((now - last_seen_timestamp) < 300) {
+ mtc_frame = (mtc_frame + last_seen_position)/2;
+ }
+
+ last_seen_timestamp = now;
+ last_seen_position = mtc_frame;
+
- average_speed = pic->get_ratio (session.audible_frame() - mtc_frame);
} else {
/* Non-PiC
*/
- nframes64_t time_delta = (now - last_mtc_timestamp);
+ framepos_t time_delta = (now - last_mtc_timestamp);
if (time_delta != 0) {
double apparent_speed = (mtc_frame - last_mtc_frame) / (double) (time_delta);
{
DEBUG_TRACE (DEBUG::MTC, string_compose ("speed cnt %1 sz %2 have %3\n", speed_accumulator_cnt, speed_accumulator_size, have_first_speed_accumulator));
+ /* clamp to an expected range */
+
+ if (this_speed > 4.0 || this_speed < -4.0) {
+ this_speed = average_speed;
+ }
+
if (speed_accumulator_cnt >= speed_accumulator_size) {
have_first_speed_accumulator = true;
speed_accumulator_cnt = 0;
and process() context (via ::speed_and_position())
*/
-
- DEBUG_TRACE (DEBUG::MTC, string_compose ("new MTC status %1\n", enum_2_string (status)));
switch (status) {
case MTC_Stopped:
current.guard1++;
bool
MTC_Slave::locked () const
{
- return port->input()->mtc_locked();
+ return port->parser()->mtc_locked();
}
bool
}
bool
-MTC_Slave::speed_and_position (double& speed, nframes64_t& pos)
+MTC_Slave::speed_and_position (double& speed, framepos_t& pos)
{
- nframes64_t now = session.engine().frame_time();
+ framepos_t now = session.engine().frame_time();
SafeTime last;
- nframes_t elapsed;
+ framecnt_t elapsed;
+ bool in_control = false;
read_current (&last);
pos = last.position;
session.request_locate (pos, false);
session.request_transport_speed (0);
- update_mtc_status (MIDI::MTC_Stopped);
- reset();
- DEBUG_TRACE (DEBUG::MTC, "MTC not seen for 1/4 second - reset\n");
+ queue_reset (false);
+ DEBUG_TRACE (DEBUG::MTC, "MTC not seen for 1/4 second - reset pending\n");
return false;
}
DEBUG_TRACE (DEBUG::MTC, string_compose ("MTC::speed_and_position %1 %2\n", last.speed, last.position));
+ if (give_slave_full_control_over_transport_speed()) {
+ in_control = (session.slave_state() == Session::Running);
+ framepos_t pic_want_locate = 0;
+ //framepos_t slave_pos = session.audible_frame();
+ framepos_t slave_pos = session.transport_frame();
+ static double average_speed = 0;
+
+ framepos_t ref_now = session.engine().frame_time_at_cycle_start();
+ average_speed = pic->get_ratio (last.timestamp, last.position, ref_now, slave_pos, in_control, session.engine().frames_per_cycle());
+
+ pic_want_locate = pic->want_locate();
+
+ if (in_control && pic_want_locate) {
+ last.speed = average_speed + (double) (pic_want_locate - session.transport_frame()) / (double)session.get_block_size();
+ std::cout << "locate req " << pic_want_locate << " speed: " << average_speed << "\n";
+ } else {
+ last.speed = average_speed;
+ }
+ }
+
if (last.speed == 0.0f) {
elapsed = 0;
/* scale elapsed time by the current MTC speed */
if (last.timestamp && (now > last.timestamp)) {
- elapsed = (nframes_t) floor (last.speed * (now - last.timestamp));
+ elapsed = (framecnt_t) floor (last.speed * (now - last.timestamp));
DEBUG_TRACE (DEBUG::MTC, string_compose ("last timecode received @ %1, now = %2, elapsed frames = %3 w/speed= %4\n",
last.timestamp, now, elapsed, last.speed));
} else {
/* now add the most recent timecode value plus the estimated elapsed interval */
- pos = elapsed + last.position;
+ if (in_control) {
+ pos = session.transport_frame();
+ } else {
+ pos = last.position + elapsed;
+ }
+
speed = last.speed;
DEBUG_TRACE (DEBUG::MTC, string_compose ("MTC::speed_and_position FINAL %1 %2\n", last.speed, pos));
+
+ DEBUG_TRACE (DEBUG::MTC, string_compose ("last = %1 elapsed = %2 pos = %3 speed = %4\n", last.position, elapsed, pos, speed));
+
return true;
}
-ARDOUR::nframes_t
-MTC_Slave::resolution() const
+ARDOUR::framecnt_t
+MTC_Slave::resolution () const
{
- return (nframes_t) session.frames_per_timecode_frame();
+ return (framecnt_t) session.frames_per_timecode_frame();
}
void
-MTC_Slave::reset ()
+MTC_Slave::queue_reset (bool reset_pos)
{
- /* XXX massive thread safety issue here. MTC could
- be being updated as we call this. but this
- supposed to be a realtime-safe call.
- */
+ Glib::Mutex::Lock lm (reset_lock);
+ reset_pending++;
+ if (reset_pos) {
+ reset_position = true;
+ }
+}
- port->input()->reset_mtc_state ();
+void
+MTC_Slave::maybe_reset ()
+{
+ Glib::Mutex::Lock lm (reset_lock);
- last_inbound_frame = 0;
- current.guard1++;
- current.position = 0;
- current.timestamp = 0;
- current.speed = 0;
- current.guard2++;
+ if (reset_pending) {
+ reset (reset_position);
+ reset_pending = 0;
+ reset_position = false;
+ }
+}
+
+void
+MTC_Slave::reset (bool with_position)
+{
+ if (with_position) {
+ last_inbound_frame = 0;
+ current.guard1++;
+ current.position = 0;
+ current.timestamp = 0;
+ current.speed = 0;
+ current.guard2++;
+ } else {
+ last_inbound_frame = 0;
+ current.guard1++;
+ current.timestamp = 0;
+ current.speed = 0;
+ current.guard2++;
+ }
window_begin = 0;
window_end = 0;
have_first_speed_accumulator = false;
speed_accumulator_cnt = 0;
- pic->out_of_bounds();
+ pic->reset();
}
void
-MTC_Slave::reset_window (nframes64_t root)
+MTC_Slave::reset_window (framepos_t root)
{
- window_begin = root;
+
+ /* if we're waiting for the master to catch us after seeking ahead, keep the window
+ of acceptable MTC frames wide open. otherwise, shrink it down to just 2 video frames
+ ahead of the window root (taking direction into account).
+ */
- if (session.slave_state() == Session::Running) {
- window_end = root + (session.frames_per_timecode_frame() * 2);
- } else {
- window_end = root + seekahead_distance ();
+ switch (port->parser()->mtc_running()) {
+ case MTC_Forward:
+ window_begin = root;
+ if (session.slave_state() == Session::Running) {
+ window_end = root + (session.frames_per_timecode_frame() * frame_tolerance);
+ } else {
+ window_end = root + seekahead_distance ();
+ }
+ break;
+
+ case MTC_Backward:
+ if (session.slave_state() == Session::Running) {
+ framecnt_t const d = session.frames_per_timecode_frame() * frame_tolerance;
+ if (root > d) {
+ window_begin = root - d;
+ window_end = root;
+ } else {
+ window_begin = 0;
+ }
+ } else {
+ framecnt_t const d = seekahead_distance ();
+ if (root > d) {
+ window_begin = root - d;
+ } else {
+ window_begin = 0;
+ }
+ }
+ window_end = root;
+ break;
+
+ default:
+ /* do nothing */
+ break;
}
DEBUG_TRACE (DEBUG::MTC, string_compose ("legal MTC window now %1 .. %2\n", window_begin, window_end));
}
-nframes64_t
+ARDOUR::framecnt_t
MTC_Slave::seekahead_distance () const
{
/* 1 second */
}
bool
-MTC_Slave::outside_window (nframes64_t pos) const
+MTC_Slave::outside_window (framepos_t pos) const
{
return ((pos < window_begin) || (pos > window_end));
}
projects / ardour.git / blobdiff