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prepare reporting slave delta & MTC slave implementation

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git-svn-id: svn://localhost/ardour2/branches/3.0@13276 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Robin Gareus 2012-10-14 23:23:53 +00:00
parent 3769c060f2
commit a6bc97add9
3 changed files with 22 additions and 3 deletions
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6
gtk2_ardour/audio_clock.cc
View file

@ -1121,7 +1121,7 @@ AudioClock::set_timecode (framepos_t when, bool /*force*/)
_left_layout->set_text (string_compose ("%1 %2",
sync_source_to_string(sync_src, true),
dynamic_cast<TimecodeSlave*>(slave)->approximate_current_position()));
_right_layout->set_text ("+- 0"); // XXX
_right_layout->set_text (slave->approximate_current_delta());
} else {
_left_layout->set_text (string_compose ("%1 --pending--",
sync_source_to_string(sync_src, true)));
@ -1131,14 +1131,14 @@ AudioClock::set_timecode (framepos_t when, bool /*force*/)
case MIDIClock:
_left_layout->set_text (string_compose ("%1",
sync_source_to_string(sync_src, true)));
_right_layout->set_text ("");
_right_layout->set_text (slave->approximate_current_delta());
break;
case LTC:
if (slave) {
_left_layout->set_text (string_compose ("%1 %2",
sync_source_to_string(sync_src, true),
dynamic_cast<TimecodeSlave*>(slave)->approximate_current_position()));
_right_layout->set_text ("+- 0"); // XXX
_right_layout->set_text (slave->approximate_current_delta());
} else {
_left_layout->set_text (string_compose ("%1 --pending--",
sync_source_to_string(sync_src, true)));

8
libs/ardour/ardour/slave.h
View file

@ -171,6 +171,12 @@ class Slave {
* @return - whether ARDOUR should use the slave speed without any adjustments
*/
virtual bool give_slave_full_control_over_transport_speed() const { return false; }
/**
* @return - current time-delta between engine and sync-source
*/
virtual std::string approximate_current_delta() const { return ""; }
};
/// We need this wrapper for testability, it's just too hard to mock up a session class
@ -255,6 +261,7 @@ class MTC_Slave : public TimecodeSlave {
bool requires_seekahead () const { return true; }
framecnt_t seekahead_distance() const;
bool give_slave_full_control_over_transport_speed() const;
std::string approximate_current_delta() const;
Timecode::TimecodeFormat apparent_timecode_format() const;
std::string approximate_current_position() const;
@ -289,6 +296,7 @@ class MTC_Slave : public TimecodeSlave {
Timecode::TimecodeFormat a3e_timecode;
Timecode::Time timecode;
bool printed_timecode_warning;
frameoffset_t current_delta;
/* DLL - chase MTC */
double t0; ///< time at the beginning of the MTC quater frame

11
libs/ardour/mtc_slave.cc
View file

@ -183,6 +183,7 @@ MTC_Slave::reset (bool with_position)
window_begin = 0;
window_end = 0;
transport_direction = 1;
current_delta = 0;
}
void
@ -629,6 +630,8 @@ MTC_Slave::speed_and_position (double& speed, framepos_t& pos)
DEBUG_TRACE (DEBUG::MTC, string_compose ("MTCsync spd: %1 pos: %2 | last-pos: %3 elapsed: %4 delta: %5\n",
speed, pos, last.position, elapsed, pos - sess_pos));
current_delta = (pos - sess_pos);
return true;
}
@ -652,3 +655,11 @@ MTC_Slave::approximate_current_position() const
Timecode::timecode_to_frames_per_second(mtc_timecode),
Timecode::timecode_has_drop_frames(mtc_timecode));
}
std::string
MTC_Slave::approximate_current_delta() const
{
char delta[24];
snprintf(delta, sizeof(delta), "%+" PRIi64, current_delta); // XXX TODO unit, refine
return std::string(delta);
}