diff options
| author | Robin Gareus <robin@gareus.org> | 2016-07-16 18:43:10 +0200 |
|---|---|---|
| committer | Robin Gareus <robin@gareus.org> | 2016-07-16 18:43:10 +0200 |
| commit | faefc3ba9a42417b133235e0a9efeaba467aad5f (patch) | |
| tree | 2c86de3fb9c36b797ca26520bdab8bd19fcb9250 /libs/ardour/audio_unit.cc | |
| parent | b7d730433bb122387d6062bc59e6c96d0e72d4fa (diff) | |
improve AU Latency PropertyChange Events
Diffstat (limited to 'libs/ardour/audio_unit.cc')
| -rw-r--r-- | libs/ardour/audio_unit.cc | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/libs/ardour/audio_unit.cc b/libs/ardour/audio_unit.cc index 3e6bdfb691..85a387e933 100644 --- a/libs/ardour/audio_unit.cc +++ b/libs/ardour/audio_unit.cc @@ -431,7 +431,7 @@ AUPlugin::AUPlugin (AudioEngine& engine, Session& session, boost::shared_ptr<CAC , unit (new CAAudioUnit) , initialized (false) , _last_nframes (0) - , _current_latency (-1) + , _current_latency (UINT_MAX) , _requires_fixed_size_buffers (false) , buffers (0) , variable_inputs (false) @@ -472,7 +472,7 @@ AUPlugin::AUPlugin (const AUPlugin& other) , unit (new CAAudioUnit) , initialized (false) , _last_nframes (0) - , _current_latency (-1) + , _current_latency (UINT_MAX) , _requires_fixed_size_buffers (false) , buffers (0) , variable_inputs (false) @@ -955,10 +955,12 @@ AUPlugin::default_value (uint32_t port) framecnt_t AUPlugin::signal_latency () const { - if (_current_latency < 0) { - _current_latency = unit->Latency() * _session.frame_rate(); + guint lat = g_atomic_int_get (&_current_latency);; + if (lat == UINT_MAX) { + lat = unit->Latency() * _session.frame_rate(); + g_atomic_int_set (&_current_latency, lat); } - return _current_latency; + return lat; } void @@ -3474,9 +3476,9 @@ AUPlugin::parameter_change_listener (void* /*arg*/, void* src, const AudioUnitEv { if (event->mEventType == kAudioUnitEvent_PropertyChange) { if (event->mArgument.mProperty.mPropertyID == kAudioUnitProperty_Latency) { - DEBUG_TRACE (DEBUG::AudioUnits, string_compose("AU Latency Change Event %1 <> %1\n", new_value, unit->Latency())); - // TODO atomically set //_current_latency = -1; - _current_latency = unit->Latency() * _session.frame_rate(); // TODO: check: new_value + DEBUG_TRACE (DEBUG::AudioUnits, string_compose("AU Latency Change Event %1 <> %2\n", new_value, unit->Latency())); + guint lat = unit->Latency() * _session.frame_rate(); + g_atomic_int_set (&_current_latency, lat); } return; } |