#include <vector>
+#include <glibmm/thread.h>
+#include <boost/signals2.hpp>
+
#include <jack/jack.h>
-#include <sigc++/signal.h>
+#include "pbd/signals.h"
+
#include "ardour/types.h"
#include "midi++/parser.h"
#include "midi++/types.h"
+class PIChaser;
+
namespace MIDI {
class Port;
}
* and after the method call they should
*
* Session::follow_slave will then try to follow the given
- * <emph>position</emph> using a delay locked loop (DLL),
+ * <em>position</em> using a delay locked loop (DLL),
* starting with the first given transport speed.
* If the values of speed and position contradict each other,
* ARDOUR will always follow the position and disregard the speed.
virtual nframes_t resolution() const = 0;
/**
- * @return - when returning true, ARDOUR will wait for one second before transport
+ * @return - when returning true, ARDOUR will wait for seekahead_distance() before transport
* starts rolling
*/
virtual bool requires_seekahead () const = 0;
+ /**
+ * @return the number of frames that this slave wants to seek ahead. Relevant
+ * only if requires_seekahead() returns true.
+ */
+
+ virtual nframes64_t seekahead_distance() const { return 0; }
+
/**
* @return - when returning true, ARDOUR will use transport speed 1.0 no matter what
* the slave returns
/// We need this wrapper for testability, it's just too hard to mock up a session class
class ISlaveSessionProxy {
public:
+ virtual ~ISlaveSessionProxy() {}
virtual TempoMap& tempo_map() const { return *((TempoMap *) 0); }
virtual nframes_t frame_rate() const { return 0; }
virtual nframes64_t audible_frame () const { return 0; }
};
struct SafeTime {
- int guard1;
- nframes_t position;
- nframes_t timestamp;
- int guard2;
-
- SafeTime() {
- guard1 = 0;
- guard2 = 0;
- timestamp = 0;
- }
+ volatile int guard1;
+ nframes64_t position;
+ nframes64_t timestamp;
+ double speed;
+ volatile int guard2;
+
+ SafeTime() {
+ guard1 = 0;
+ position = 0;
+ timestamp = 0;
+ speed = 0;
+ guard2 = 0;
+ }
};
-class MTC_Slave : public Slave, public sigc::trackable {
+class MTC_Slave : public Slave {
public:
MTC_Slave (Session&, MIDI::Port&);
~MTC_Slave ();
nframes_t resolution() const;
bool requires_seekahead () const { return true; }
+ nframes64_t seekahead_distance() const;
+ bool give_slave_full_control_over_transport_speed() const;
private:
Session& session;
MIDI::Port* port;
- std::vector<sigc::connection> connections;
+ PBD::ScopedConnectionList port_connections;
bool can_notify_on_unknown_rate;
-
- SafeTime current;
- nframes_t mtc_frame; /* current time */
- nframes_t last_inbound_frame; /* when we got it; audio clocked */
- MIDI::byte last_mtc_fps_byte;
-
- double mtc_speed;
- nframes_t first_mtc_frame;
- nframes_t first_mtc_time;
-
- static const int32_t accumulator_size = 128;
- double accumulator[accumulator_size];
- int32_t accumulator_index;
- bool have_first_accumulated_speed;
-
- void reset ();
- void update_mtc_qtr (MIDI::Parser&);
- void update_mtc_time (const MIDI::byte *, bool);
- void update_mtc_status (MIDI::Parser::MTC_Status);
+ PIChaser* pic;
+
+ static const int frame_tolerance;
+
+ SafeTime current;
+ nframes_t mtc_frame; /* current time */
+ nframes_t last_inbound_frame; /* when we got it; audio clocked */
+ MIDI::byte last_mtc_fps_byte;
+ nframes64_t window_begin;
+ nframes64_t window_end;
+ nframes64_t last_mtc_timestamp;
+ nframes64_t last_mtc_frame;
+ bool did_reset_tc_format;
+ TimecodeFormat saved_tc_format;
+ size_t speed_accumulator_size;
+ double* speed_accumulator;
+ size_t speed_accumulator_cnt;
+ bool have_first_speed_accumulator;
+ double average_speed;
+ Glib::Mutex reset_lock;
+ uint32_t reset_pending;
+ bool reset_position;
+
+ void reset (bool with_pos);
+ void queue_reset (bool with_pos);
+ void maybe_reset ();
+
+ void update_mtc_qtr (MIDI::Parser&, int, nframes_t);
+ void update_mtc_time (const MIDI::byte *, bool, nframes_t);
+ void update_mtc_status (MIDI::MTC_Status);
void read_current (SafeTime *) const;
+ void reset_window (nframes64_t);
+ bool outside_window (nframes64_t) const;
+ void process_apparent_speed (double);
};
-class MIDIClock_Slave : public Slave, public sigc::trackable {
+class MIDIClock_Slave : public Slave {
public:
MIDIClock_Slave (Session&, MIDI::Port&, int ppqn = 24);
/// Constructor for unit tests
- MIDIClock_Slave (ISlaveSessionProxy* session_proxy, int ppqn = 24);
+ MIDIClock_Slave (ISlaveSessionProxy* session_proxy = 0, int ppqn = 24);
~MIDIClock_Slave ();
void rebind (MIDI::Port&);
void set_bandwidth (double a_bandwith) { bandwidth = a_bandwith; }
- private:
+ protected:
ISlaveSessionProxy* session;
MIDI::Port* port;
- std::vector<sigc::connection> connections;
+ PBD::ScopedConnectionList port_connections;
/// pulses per quarter note for one MIDI clock frame (default 24)
int ppqn;
bool _starting;
};
-class ADAT_Slave : public Slave
-{
- public:
- ADAT_Slave () {}
- ~ADAT_Slave () {}
-
- bool speed_and_position (double& speed, nframes64_t& pos) {
- speed = 0;
- pos = 0;
- return false;
- }
-
- bool locked() const { return false; }
- bool ok() const { return false; }
- nframes_t resolution() const { return 1; }
- bool requires_seekahead () const { return true; }
-};
-
class JACK_Slave : public Slave
{
public: