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/*
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 <iostream>
#include <ardour/midi_port.h>
#include <ardour/data_type.h>
using namespace ARDOUR;
using namespace std;
MidiPort::MidiPort (const std::string& name, Flags flags, bool ext, nframes_t capacity)
: Port (name, DataType::MIDI, flags, ext)
, _has_been_mixed_down (false)
{
// FIXME: size kludge (see BufferSet::ensure_buffers)
// Jack needs to tell us this
_buffer = new MidiBuffer (capacity * 8);
}
MidiPort::~MidiPort()
{
delete _buffer;
}
void
MidiPort::cycle_start (nframes_t nframes, nframes_t offset)
{
if (external ()) {
_buffer->clear ();
assert (_buffer->size () == 0);
if (sends_output ()) {
jack_midi_clear_buffer (jack_port_get_buffer (_jack_port, nframes));
}
}
}
MidiBuffer &
MidiPort::get_midi_buffer( nframes_t nframes, nframes_t offset ) {
if (_has_been_mixed_down) {
return *_buffer;
}
if (receives_input ()) {
if (external ()) {
void* jack_buffer = jack_port_get_buffer (_jack_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);
// i guess this should do but i leave it off to test the rest first.
//if (ev.time > offset && ev.time < offset+nframes)
_buffer->push_back (ev);
}
assert(_buffer->size() == event_count);
if (nframes) {
_has_been_mixed_down = true;
}
if (!_connections.empty()) {
mixdown (nframes, offset, false);
}
} else {
if (_connections.empty()) {
_buffer->silence (nframes, offset);
} else {
mixdown (nframes, offset, true);
}
}
} else {
_buffer->silence (nframes, offset);
}
if (nframes) {
_has_been_mixed_down = true;
}
return *_buffer;
}
void
MidiPort::cycle_end (nframes_t nframes, nframes_t offset)
{
#if 0
if (external () && sends_output ()) {
/* FIXME: offset */
// We're an output - copy events from source buffer to Jack buffer
void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
jack_midi_clear_buffer (jack_buffer);
for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
const Evoral::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());
}
}
#endif
_has_been_mixed_down = false;
}
void
MidiPort::flush_buffers (nframes_t nframes, nframes_t offset)
{
/* FIXME: offset */
if (external () && sends_output ()) {
void* jack_buffer = jack_port_get_buffer (_jack_port, nframes);
for (MidiBuffer::iterator i = _buffer->begin(); i != _buffer->end(); ++i) {
const Evoral::Event& ev = *i;
// event times should be frames, relative to cycle start
assert(ev.time() >= 0);
assert(ev.time() < (nframes+offset));
if (ev.time() >= offset) {
jack_midi_event_write (jack_buffer, (jack_nframes_t) ev.time(), ev.buffer(), ev.size());
}
}
}
}
void
MidiPort::mixdown (nframes_t cnt, nframes_t offset, bool first_overwrite)
{
set<Port*>::const_iterator p = _connections.begin();
if (first_overwrite) {
_buffer->read_from ((dynamic_cast<MidiPort*>(*p))->get_midi_buffer (cnt, offset), cnt, offset);
p++;
}
// XXX DAVE: this is just a guess
for (; p != _connections.end(); ++p) {
_buffer->merge (*_buffer, (dynamic_cast<MidiPort*>(*p))->get_midi_buffer (cnt, offset));
}
}
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