diff options
Diffstat (limited to 'libs/ardour/audioengine.cc')
| -rw-r--r-- | libs/ardour/audioengine.cc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc index cc04c343e1..ef3899bf2f 100644 --- a/libs/ardour/audioengine.cc +++ b/libs/ardour/audioengine.cc @@ -79,6 +79,7 @@ AudioEngine::AudioEngine (string client_name, string session_uuid) , m_meter_thread (0) , _main_thread (0) , _ltc_input () + , _ltc_output () , ports (new Ports) { _instance = this; /* singleton */ @@ -94,6 +95,12 @@ AudioEngine::AudioEngine (string client_name, string session_uuid) #ifdef HAVE_LTC _ltc_input = register_port (DataType::AUDIO, _("LTC in"), true); + /* register_port() would allocate buffers and pass a shadow copy + * which is subject to ardour's route buffering behavioud and + * not suitable for generating LTC independent of transport state. + */ + _ltc_output.reset(new AudioPort ("LTC out", Port::IsOutput)); + /* As of October 2012, the LTC source port is the only thing that needs * to care about Config parameters, so don't bother to listen if we're * not doing LTC stuff. This might change if other parameters show up @@ -107,6 +114,11 @@ AudioEngine::AudioEngine (string client_name, string session_uuid) AudioEngine::~AudioEngine () { config_connection.disconnect (); +#ifdef HAVE_LTC + if (_ltc_output && _ltc_output->jack_port()) { + jack_port_disconnect (_jack, _ltc_output->jack_port()); + } +#endif { Glib::Threads::Mutex::Lock tm (_process_lock); @@ -537,6 +549,15 @@ AudioEngine::process_callback (pframes_t nframes) } if (_session == 0) { +#ifdef HAVE_LTC + // silence LTC + jack_default_audio_sample_t *out; + boost::shared_ptr<Port> ltcport = ltc_output_port(); + if (ltcport && ltcport->jack_port()) { + out = (jack_default_audio_sample_t*) jack_port_get_buffer (ltcport->jack_port(), nframes); + if (out) memset(out, 0, nframes * sizeof(jack_default_audio_sample_t)); + } +#endif if (!_freewheeling) { MIDI::Manager::instance()->cycle_start(nframes); @@ -1644,6 +1665,9 @@ AudioEngine::parameter_changed (const std::string& s) if (s == "ltc-source-port") { reconnect_ltc (); } + else if (s == "ltc-sink-port") { + // TODO + } } |