void BpmControl::slotTapFilter(double averageLength, int numSamples) {
// averageLength is the average interval in milliseconds tapped over
// numSamples samples. Have to convert to BPM now:
if (averageLength <= 0)
return;
if (numSamples < 4)
return;
// (60 seconds per minute) * (1000 milliseconds per second) / (X millis per
// beat) = Y beats/minute
double averageBpm = 60.0 * 1000.0 / averageLength;
double dRate = calcRateRatio();
m_pFileBpm->set(averageBpm / dRate);
slotUpdateEngineBpm();
}
double BpmControl::updateLocalBpm() {
double prev_local_bpm = m_pLocalBpm->get();
double local_bpm = 0;
if (m_pBeats) {
local_bpm = m_pBeats->getBpmAroundPosition(getCurrentSample(),
kLocalBpmSpan);
if (local_bpm == -1) {
local_bpm = m_pFileBpm->get();
}
} else {
local_bpm = m_pFileBpm->get();
}
if (local_bpm != prev_local_bpm) {
m_pLocalBpm->set(local_bpm);
slotUpdateEngineBpm();
}
return local_bpm;
}
double BpmControl::updateLocalBpm() {
double prev_local_bpm = m_pLocalBpm->get();
double local_bpm = 0;
BeatsPointer pBeats = m_pBeats;
if (pBeats) {
local_bpm = pBeats->getBpmAroundPosition(
getSampleOfTrack().current, kLocalBpmSpan);
if (local_bpm == -1) {
local_bpm = m_pFileBpm->get();
}
} else {
local_bpm = m_pFileBpm->get();
}
if (local_bpm != prev_local_bpm) {
m_pLocalBpm->set(local_bpm);
slotUpdateEngineBpm();
}
return local_bpm;
}
void BpmControl::slotFileBpmChanged(double bpm) {
Q_UNUSED(bpm);
// Adjust the file-bpm with the current setting of the rate to get the
// engine BPM. We only do this for SYNC_NONE decks because EngineSync will
// set our BPM if the file BPM changes. See SyncControl::fileBpmChanged().
if (m_pBeats) {
const double beats_bpm =
m_pBeats->getBpmAroundPosition(getCurrentSample(),
kLocalBpmSpan);
if (beats_bpm != -1) {
m_pLocalBpm->set(beats_bpm);
} else {
m_pLocalBpm->set(bpm);
}
} else {
m_pLocalBpm->set(bpm);
}
if (getSyncMode() == SYNC_NONE) {
slotUpdateEngineBpm();
}
resetSyncAdjustment();
}
BpmControl::BpmControl(QString group,
UserSettingsPointer pConfig) :
EngineControl(group, pConfig),
m_dPreviousSample(0),
m_dSyncTargetBeatDistance(0.0),
m_dSyncInstantaneousBpm(0.0),
m_dLastSyncAdjustment(1.0),
m_resetSyncAdjustment(false),
m_dUserOffset(0.0),
m_tapFilter(this, kFilterLength, kMaxInterval),
m_sGroup(group) {
m_pPlayButton = new ControlProxy(group, "play", this);
m_pReverseButton = new ControlProxy(group, "reverse", this);
m_pRateSlider = new ControlProxy(group, "rate", this);
m_pRateSlider->connectValueChanged(SLOT(slotUpdateEngineBpm()),
Qt::DirectConnection);
m_pQuantize = ControlObject::getControl(group, "quantize");
m_pRateRange = new ControlProxy(group, "rateRange", this);
m_pRateRange->connectValueChanged(SLOT(slotUpdateRateSlider()),
Qt::DirectConnection);
m_pRateDir = new ControlProxy(group, "rate_dir", this);
m_pRateDir->connectValueChanged(SLOT(slotUpdateEngineBpm()),
Qt::DirectConnection);
m_pPrevBeat.reset(new ControlProxy(group, "beat_prev"));
m_pNextBeat.reset(new ControlProxy(group, "beat_next"));
m_pClosestBeat.reset(new ControlProxy(group, "beat_closest"));
m_pLoopEnabled = new ControlProxy(group, "loop_enabled", this);
m_pLoopStartPosition = new ControlProxy(group, "loop_start_position", this);
m_pLoopEndPosition = new ControlProxy(group, "loop_end_position", this);
m_pFileBpm = new ControlObject(ConfigKey(group, "file_bpm"));
connect(m_pFileBpm, SIGNAL(valueChanged(double)),
this, SLOT(slotFileBpmChanged(double)),
Qt::DirectConnection);
m_pLocalBpm = new ControlObject(ConfigKey(group, "local_bpm"));
m_pAdjustBeatsFaster = new ControlPushButton(ConfigKey(group, "beats_adjust_faster"), false);
connect(m_pAdjustBeatsFaster, SIGNAL(valueChanged(double)),
this, SLOT(slotAdjustBeatsFaster(double)),
Qt::DirectConnection);
m_pAdjustBeatsSlower = new ControlPushButton(ConfigKey(group, "beats_adjust_slower"), false);
connect(m_pAdjustBeatsSlower, SIGNAL(valueChanged(double)),
this, SLOT(slotAdjustBeatsSlower(double)),
Qt::DirectConnection);
m_pTranslateBeatsEarlier = new ControlPushButton(ConfigKey(group, "beats_translate_earlier"), false);
connect(m_pTranslateBeatsEarlier, SIGNAL(valueChanged(double)),
this, SLOT(slotTranslateBeatsEarlier(double)),
Qt::DirectConnection);
m_pTranslateBeatsLater = new ControlPushButton(ConfigKey(group, "beats_translate_later"), false);
connect(m_pTranslateBeatsLater, SIGNAL(valueChanged(double)),
this, SLOT(slotTranslateBeatsLater(double)),
Qt::DirectConnection);
// Pick a wide range (1 to 200) and allow out of bounds sets. This lets you
// map a soft-takeover MIDI knob to the BPM. This also creates bpm_up and
// bpm_down controls.
// bpm_up / bpm_down steps by 1
// bpm_up_small / bpm_down_small steps by 0.1
m_pEngineBpm = new ControlLinPotmeter(ConfigKey(group, "bpm"), 1, 200, 1, 0.1, true);
connect(m_pEngineBpm, SIGNAL(valueChanged(double)),
this, SLOT(slotUpdateRateSlider()),
Qt::DirectConnection);
m_pButtonTap = new ControlPushButton(ConfigKey(group, "bpm_tap"));
connect(m_pButtonTap, SIGNAL(valueChanged(double)),
this, SLOT(slotBpmTap(double)),
Qt::DirectConnection);
// Beat sync (scale buffer tempo relative to tempo of other buffer)
m_pButtonSync = new ControlPushButton(ConfigKey(group, "beatsync"));
connect(m_pButtonSync, SIGNAL(valueChanged(double)),
this, SLOT(slotControlBeatSync(double)),
Qt::DirectConnection);
m_pButtonSyncPhase = new ControlPushButton(ConfigKey(group, "beatsync_phase"));
connect(m_pButtonSyncPhase, SIGNAL(valueChanged(double)),
this, SLOT(slotControlBeatSyncPhase(double)),
Qt::DirectConnection);
m_pButtonSyncTempo = new ControlPushButton(ConfigKey(group, "beatsync_tempo"));
connect(m_pButtonSyncTempo, SIGNAL(valueChanged(double)),
this, SLOT(slotControlBeatSyncTempo(double)),
Qt::DirectConnection);
m_pTranslateBeats = new ControlPushButton(ConfigKey(group, "beats_translate_curpos"));
connect(m_pTranslateBeats, SIGNAL(valueChanged(double)),
this, SLOT(slotBeatsTranslate(double)),
Qt::DirectConnection);
m_pBeatsTranslateMatchAlignment = new ControlPushButton(ConfigKey(group, "beats_translate_match_alignment"));
connect(m_pBeatsTranslateMatchAlignment, SIGNAL(valueChanged(double)),
this, SLOT(slotBeatsTranslateMatchAlignment(double)),
Qt::DirectConnection);
connect(&m_tapFilter, SIGNAL(tapped(double,int)),
this, SLOT(slotTapFilter(double,int)),
Qt::DirectConnection);
// Measures distance from last beat in percentage: 0.5 = half-beat away.
m_pThisBeatDistance = new ControlProxy(group, "beat_distance", this);
m_pSyncMode = ControlObject::getControl(ConfigKey(group, "sync_mode"));
}