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Diffstat (limited to 'libs/ardour/jack_midi_port.cc')
-rw-r--r-- | libs/ardour/jack_midi_port.cc | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/libs/ardour/jack_midi_port.cc b/libs/ardour/jack_midi_port.cc new file mode 100644 index 0000000000..6d8e4c8c5d --- /dev/null +++ b/libs/ardour/jack_midi_port.cc @@ -0,0 +1,91 @@ +/* + Copyright (C) 2006 Paul Davis + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include <cassert> +#include <ardour/jack_midi_port.h> + +using namespace ARDOUR; +JackMidiPort::JackMidiPort (const std::string& name, Flags flgs, MidiBuffer* buf) + : Port (name, flgs) + , JackPort (name, DataType::MIDI, flgs) + , BaseMidiPort (name, flgs) +{ + // MIDI ports always need a buffer since jack buffer format is different + assert(buf); + + _buffer = buf; + _own_buffer = false; +} + +void +JackMidiPort::cycle_start (nframes_t nframes, nframes_t offset) +{ + /* FIXME: offset */ + + _buffer->clear(); + assert(_buffer->size() == 0); + + if (_flags & IsOutput) { + return; + } + + // We're an input - copy Jack events to internal buffer + + void* jack_buffer = jack_port_get_buffer(_port, nframes); + const nframes_t event_count = jack_midi_get_event_count(jack_buffer); + + assert(event_count < _buffer->capacity()); + + jack_midi_event_t ev; + + for (nframes_t i=0; i < event_count; ++i) { + + jack_midi_event_get (&ev, jack_buffer, i); + + _buffer->push_back (ev); + } + + assert(_buffer->size() == event_count); + + /*if (_buffer->size() > 0) + cerr << "JackMIDIPort got " << event_count << " events (buf " << _buffer << ")" << endl;*/ +} + +void +JackMidiPort::cycle_end (nframes_t nframes, nframes_t offset) +{ + /* FIXME: offset */ + + if (_flags & IsInput) { + return; + } + + // We're an output - copy events from source buffer to Jack buffer + + void* jack_buffer = jack_port_get_buffer (_port, nframes); + + jack_midi_clear_buffer (jack_buffer); + + for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) { + const MIDI::Event& ev = *i; + // event times should be frames, relative to cycle start + assert(ev.time() >= 0); + assert(ev.time() < nframes); + jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size()); + } +} |