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/*
SMF GUI Player test using the MIDI Sequencer C++ library
Copyright (C) 2006-2024, Pedro Lopez-Cabanillas <plcl@users.sf.net>
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "player.h"
#include "song.h"
#include <cmath>
#include <drumstick/alsaclient.h>
#include <drumstick/alsaqueue.h>
using namespace drumstick::ALSA;
Player::Player(MidiClient *seq, int portId)
: SequencerOutputThread(seq, portId),
m_song(nullptr),
m_songIterator(nullptr),
m_lastEvent(nullptr),
m_songPosition(0),
m_echoResolution(0),
m_pitchShift(0),
m_volumeFactor(100)
{
for (int chan = 0; chan < MIDI_CHANNELS; ++chan)
m_volume[chan] = 100;
}
Player::~Player()
{
if (isRunning()) {
stop();
}
delete m_songIterator;
delete m_lastEvent;
}
void Player::setSong(Song* s)
{
m_song = s;
if (m_song != nullptr) {
delete m_songIterator;
m_songIterator = new SongIterator(*m_song);
m_echoResolution = m_song->getDivision() / 12;
m_songPosition = 0;
}
}
void Player::resetPosition()
{
if ((m_song != nullptr) && (m_songIterator != nullptr)) {
m_songIterator->toFront();
m_songPosition = 0;
}
}
void Player::setPosition(unsigned int pos)
{
m_songPosition = pos;
m_songIterator->toFront();
while (m_songIterator->hasNext() &&
(m_songIterator->next()->getTick() < pos)) { };
if (m_songIterator->hasPrevious())
m_songIterator->previous();
}
bool Player::hasNext()
{
auto res = m_songIterator->hasNext();
return res;
}
SequencerEvent* Player::nextEvent()
{
delete m_lastEvent;
m_lastEvent = m_songIterator->next()->clone();
switch (m_lastEvent->getSequencerType()) {
case SND_SEQ_EVENT_NOTE:
case SND_SEQ_EVENT_NOTEON:
case SND_SEQ_EVENT_NOTEOFF:
case SND_SEQ_EVENT_KEYPRESS: {
KeyEvent* kev = static_cast<KeyEvent*>(m_lastEvent);
if (kev->getChannel() != MIDI_GM_DRUM_CHANNEL)
kev->setKey(kev->getKey() + m_pitchShift);
}
break;
case SND_SEQ_EVENT_CONTROLLER: {
ControllerEvent *cev = static_cast<ControllerEvent*>(m_lastEvent);
if (cev->getParam() == MIDI_CTL_MSB_MAIN_VOLUME) {
int chan = cev->getChannel();
int value = cev->getValue();
m_volume[chan] = value;
value = floor(value * m_volumeFactor / 100.0);
if (value < 0) value = 0;
if (value > 127) value = 127;
cev->setValue(value);
}
}
break;
}
return m_lastEvent;
}
unsigned int Player::getInitialPosition()
{
return m_songPosition;
}
unsigned int Player::getEchoResolution()
{
return m_echoResolution;
}
unsigned int Player::getPitchShift()
{
return m_pitchShift;
}
unsigned int Player::getVolumeFactor()
{
return m_volumeFactor;
}
void Player::setPitchShift(unsigned int pitch)
{
bool playing = isRunning();
if (playing) {
stop();
unsigned int pos = m_Queue->getStatus().getTickTime();
m_Queue->clear();
allNotesOff();
setPosition(pos);
}
m_pitchShift = pitch;
if (playing)
start();
}
void Player::setVolumeFactor(unsigned int vol)
{
m_volumeFactor = vol;
for(int chan = 0; chan < MIDI_CHANNELS; ++chan) {
int value = m_volume[chan];
value = floor(value * m_volumeFactor / 100.0);
if (value < 0) value = 0;
if (value > 127) value = 127;
sendController(chan, MIDI_CTL_MSB_MAIN_VOLUME, value);
}
}
void Player::sendController(int chan, int control, int value)
{
ControllerEvent ev(chan, control, value);
ev.setSource(m_PortId);
ev.setSubscribers();
ev.setDirect();
sendSongEvent(&ev);
}
void Player::allNotesOff()
{
for(int chan = 0; chan < MIDI_CHANNELS; ++chan) {
sendController(chan, MIDI_CTL_ALL_NOTES_OFF, 0);
sendController(chan, MIDI_CTL_ALL_SOUNDS_OFF, 0);
}
}
void Player::sendVolumeEvents()
{
for(int chan = 0; chan < MIDI_CHANNELS; ++chan) {
int value = m_volume[chan] = 100;
value = floor(value * m_volumeFactor / 100.0);
if (value < 0) value = 0;
if (value > 127) value = 127;
sendController(chan, MIDI_CTL_MSB_MAIN_VOLUME, value);
}
}
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