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make use of measured latency values to set dialog controls, and use actual port latency to compute extra delay

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This commit is contained in:
Paul Davis 2013-09-11 13:02:32 -04:00
parent 18c4c9656a
commit 91e2eab01a
4 changed files with 35 additions and 1 deletions
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23
gtk2_ardour/engine_dialog.cc
View file

@ -249,6 +249,7 @@ and microphone.\n\n\
xopt = AttachOptions(0);
lm_measure_button.signal_toggled().connect (sigc::mem_fun (*this, &EngineControl::latency_button_toggled));
lm_use_button.signal_clicked().connect (sigc::mem_fun (*this, &EngineControl::use_latency_button_clicked));
lm_use_button.set_sensitive (false);
lm_table.attach (lm_measure_button, 0, 2, row, row+1, xopt, (AttachOptions) 0);
@ -972,7 +973,10 @@ EngineControl::check_latency_measurement ()
return false;
}
snprintf (buf, sizeof (buf), "%10.3lf frames %10.3lf ms", mtdm->del (), mtdm->del () * 1000.0f/sample_rate);
uint32_t frames_total = mtdm->del();
uint32_t extra = frames_total - ARDOUR::AudioEngine::instance()->latency_signal_delay();
snprintf (buf, sizeof (buf), "%u samples %10.3lf ms", extra, extra * 1000.0f/sample_rate);
bool solid = true;
@ -1016,3 +1020,20 @@ EngineControl::latency_button_toggled ()
update_latency_display ();
}
}
void
EngineControl::use_latency_button_clicked ()
{
MTDM* mtdm = ARDOUR::AudioEngine::instance()->mtdm ();
if (!mtdm) {
return;
}
uint32_t frames_total = mtdm->del();
uint32_t extra = frames_total - ARDOUR::AudioEngine::instance()->latency_signal_delay();
uint32_t one_way = extra/2;
input_latency_adjustment.set_value (one_way);
output_latency_adjustment.set_value (one_way);
}

1
gtk2_ardour/engine_dialog.h
View file

@ -164,6 +164,7 @@ class EngineControl : public ArdourDialog, public PBD::ScopedConnectionList {
void on_response (int);
void control_app_button_clicked ();
void use_latency_button_clicked ();
void manage_control_app_sensitivity ();
int push_state_to_backend (bool start);
uint32_t _desired_sample_rate;

2
libs/ardour/ardour/audioengine.h
View file

@ -191,6 +191,7 @@ public:
void stop_latency_detection ();
void set_latency_input_port (const std::string&);
void set_latency_output_port (const std::string&);
uint32_t latency_signal_delay () const { return _latency_signal_latency; }
private:
AudioEngine ();
@ -222,6 +223,7 @@ public:
framecnt_t _latency_flush_frames;
std::string _latency_input_name;
std::string _latency_output_name;
framecnt_t _latency_signal_latency;
void meter_thread ();
void start_metering_thread ();

10
libs/ardour/audioengine.cc
View file

@ -79,6 +79,7 @@ AudioEngine::AudioEngine ()
, _latency_input_port (0)
, _latency_output_port (0)
, _latency_flush_frames (0)
, _latency_signal_latency (0)
{
g_atomic_int_set (&m_meter_exit, 0);
discover_backends ();
@ -1013,6 +1014,15 @@ AudioEngine::start_latency_detection ()
return;
}
LatencyRange lr;
_latency_signal_latency = 0;
lr = pe.get_latency_range (_latency_input_port, false);
_latency_signal_latency = lr.max;
lr = pe.get_latency_range (_latency_output_port, true);
_latency_signal_latency += lr.max;
cerr << "latency signal pathway = " << _latency_signal_latency << endl;
/* all created and connected, lets go */
_mtdm = new MTDM (sample_rate());