diff options
Diffstat (limited to 'libs/ardour')
| -rw-r--r-- | libs/ardour/ardour/audio_backend.h | 5 | ||||
| -rw-r--r-- | libs/ardour/audioengine.cc | 14 |
2 files changed, 17 insertions, 2 deletions
diff --git a/libs/ardour/ardour/audio_backend.h b/libs/ardour/ardour/audio_backend.h index 4d57f0b43d..9052acd530 100644 --- a/libs/ardour/ardour/audio_backend.h +++ b/libs/ardour/ardour/audio_backend.h @@ -223,6 +223,11 @@ class AudioBackend : public PortEngine { virtual uint32_t systemic_input_latency () const = 0; virtual uint32_t systemic_output_latency () const = 0; + /** override this if this implementation returns true from + * requires_driver_selection() + */ + virtual std::string driver_name() const { return std::string(); } + /** Return the name of a control application for the * selected/in-use device. If no such application exists, * or if no device has been selected or is in-use, diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc index d33445d08f..465f88de56 100644 --- a/libs/ardour/audioengine.cc +++ b/libs/ardour/audioengine.cc @@ -1039,12 +1039,22 @@ AudioEngine::start_latency_detection () delete _mtdm; _mtdm = 0; + /* find the ports we will connect to */ + + PortEngine::PortHandle* out = pe.get_port_by_name (_latency_output_name); + PortEngine::PortHandle* in = pe.get_port_by_name (_latency_input_name); + + if (!out || !in) { + return; + } + /* create the ports we will use to read/write data */ if ((_latency_output_port = pe.register_port ("latency_out", DataType::AUDIO, IsOutput)) == 0) { return; } if (pe.connect (_latency_output_port, _latency_output_name)) { + pe.unregister_port (_latency_output_port); return; } @@ -1060,9 +1070,9 @@ AudioEngine::start_latency_detection () LatencyRange lr; _latency_signal_latency = 0; - lr = pe.get_latency_range (_latency_input_port, false); + lr = pe.get_latency_range (in, false); _latency_signal_latency = lr.max; - lr = pe.get_latency_range (_latency_output_port, true); + lr = pe.get_latency_range (out, true); _latency_signal_latency += lr.max; /* all created and connected, lets go */ |