Paul Davis
07be98b341
git-svn-id: svn://localhost/ardour2/branches/3.0@5774 d708f5d6-7413-0410-9779-e7cbd77b26cf
158 lines
3.4 KiB
C++
158 lines
3.4 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cassert>
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#include <iostream>
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#include "ardour/midi_port.h"
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#include "ardour/data_type.h"
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using namespace ARDOUR;
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using namespace std;
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MidiPort::MidiPort (const std::string& name, Flags flags)
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: Port (name, DataType::MIDI, flags)
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, _has_been_mixed_down (false)
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, _resolve_in_process (false)
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{
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_buffer = new MidiBuffer (raw_buffer_size(0));
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}
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MidiPort::~MidiPort()
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{
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delete _buffer;
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}
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void
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MidiPort::cycle_start (nframes_t nframes)
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{
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_buffer->clear ();
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assert (_buffer->size () == 0);
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if (sends_output ()) {
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jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, nframes));
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}
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}
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MidiBuffer &
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MidiPort::get_midi_buffer (nframes_t nframes, nframes_t offset)
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{
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if (_has_been_mixed_down) {
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return *_buffer;
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}
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if (receives_input ()) {
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void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
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const nframes_t event_count = jack_midi_get_event_count(jack_buffer);
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assert (event_count < _buffer->capacity());
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/* suck all relevant MIDI events from the JACK MIDI port buffer
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into our MidiBuffer
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*/
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nframes_t off = offset + _port_offset;
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for (nframes_t i = 0; i < event_count; ++i) {
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jack_midi_event_t ev;
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jack_midi_event_get (&ev, jack_buffer, i);
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if (ev.time > off && ev.time < off+nframes) {
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_buffer->push_back (ev);
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}
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}
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if (nframes) {
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_has_been_mixed_down = true;
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}
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} else {
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_buffer->silence (nframes);
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}
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if (nframes) {
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_has_been_mixed_down = true;
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}
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return *_buffer;
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}
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void
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MidiPort::cycle_end (nframes_t /*nframes*/)
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{
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_has_been_mixed_down = false;
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}
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void
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MidiPort::cycle_split ()
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{
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_has_been_mixed_down = false;
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}
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void
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MidiPort::flush_buffers (nframes_t nframes, nframes64_t time, nframes_t offset)
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{
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if (sends_output ()) {
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void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
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// Feed the data through the MidiStateTracker
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bool did_loop;
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_midi_state_tracker.track (_buffer->begin(), _buffer->end(), did_loop);
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if (did_loop || _resolve_in_process) {
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/* add necessary note offs */
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_midi_state_tracker.resolve_notes (*_buffer, time);
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}
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_resolve_in_process = false;
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for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
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const Evoral::Event<nframes_t>& ev = *i;
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// event times are in frames, relative to cycle start
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// XXX split cycle start or cycle start?
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assert(ev.time() < (nframes+offset+_port_offset));
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if (ev.time() >= offset + _port_offset) {
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jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
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}
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}
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}
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}
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void
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MidiPort::transport_stopped ()
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{
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_resolve_in_process = true;
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}
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size_t
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MidiPort::raw_buffer_size (nframes_t nframes) const
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{
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return jack_midi_max_event_size(jack_port_get_buffer(_jack_port, nframes));
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}
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