diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2016-06-19 23:41:26 -0400 |
---|---|---|
committer | Paul Davis <paul@linuxaudiosystems.com> | 2016-09-27 14:59:29 -0500 |
commit | 8a06e6735d058cb132ef6f75df550353e2e0b70e (patch) | |
tree | 7ba5f583f2d78947988e5b2440ecdc38a33d6292 /libs/ardour/async_midi_port.cc | |
parent | 1448be481f8ba11eb9401fb9024a506a7241b64a (diff) |
add initial implementation of a "shadow port" for AsyncMIDIPort.
The shadow port is a secondary port that can be used to allow others to get a copy of part, all or none of the MIDI
stream received by the owner (input) port.
Diffstat (limited to 'libs/ardour/async_midi_port.cc')
-rw-r--r-- | libs/ardour/async_midi_port.cc | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libs/ardour/async_midi_port.cc b/libs/ardour/async_midi_port.cc index bbcc0aab85..ff9a920c69 100644 --- a/libs/ardour/async_midi_port.cc +++ b/libs/ardour/async_midi_port.cc @@ -41,6 +41,30 @@ pthread_t AsyncMIDIPort::_process_thread; #define port_engine AudioEngine::instance()->port_engine() +static bool +filter_relax (MidiBuffer& in, MidiBuffer& out) +{ + return false; +} + +static bool +filter_copy (MidiBuffer& in, MidiBuffer& out) +{ + out.copy (in); + return false; +} + +static bool +filter_notes_only (MidiBuffer& in, MidiBuffer& out) +{ + for (MidiBuffer::iterator b = in.begin(); b != in.end(); ++b) { + if ((*b).is_note_on() || (*b).is_note_off()) { + out.push_back (*b); + } + } + return false; +} + AsyncMIDIPort::AsyncMIDIPort (string const & name, PortFlags flags) : MidiPort (name, flags) , MIDI::Port (name, MIDI::Port::Flags (0)) @@ -50,6 +74,7 @@ AsyncMIDIPort::AsyncMIDIPort (string const & name, PortFlags flags) , output_fifo (2048) , input_fifo (1024) , _xthread (true) + , inbound_midi_filter (boost::bind (filter_notes_only, _1, _2)) { } @@ -145,6 +170,12 @@ AsyncMIDIPort::cycle_start (MIDI::pframes_t nframes) if (!mb.empty()) { _xthread.wakeup (); } + + if (shadow_port) { + inbound_midi_filter (mb, shadow_port->get_midi_buffer (nframes)); + } else { + inbound_midi_filter (mb, mb); + } } } @@ -341,3 +372,22 @@ AsyncMIDIPort::is_process_thread() return pthread_equal (pthread_self(), _process_thread); } +int +AsyncMIDIPort::add_shadow_port (string const & name) +{ + if (!ARDOUR::Port::receives_input()) { + return -1; + } + + if (shadow_port) { + return -2; + } + + /* shadow port is not async. */ + + if (!(shadow_port = boost::dynamic_pointer_cast<MidiPort> (AudioEngine::instance()->register_output_port (DataType::MIDI, name, false)))) { + return -3; + } + + return 0; +} |