double RateControl::calculateRate(double baserate, bool paused,
int iSamplesPerBuffer, bool* isScratching) {
double rate = (paused ? 0 : 1.0);
double searching = m_pRateSearch->get();
if (searching) {
// If searching is in progress, it overrides everything else
rate = searching;
} else {
double wheelFactor = getWheelFactor();
double jogFactor = getJogFactor();
bool bVinylControlEnabled = m_pVCEnabled && m_pVCEnabled->get() > 0.0;
bool scratchEnable = m_pScratchToggle->get() != 0 || bVinylControlEnabled;
double scratchFactor = m_pScratch->get();
// Don't trust values from m_pScratch
if (isnan(scratchFactor)) {
scratchFactor = 0.0;
}
// Old Scratch works without scratchEnable
double oldScratchFactor = m_pOldScratch->get(); // Deprecated
// Don't trust values from m_pScratch
if (isnan(oldScratchFactor)) {
oldScratchFactor = 0.0;
}
// If vinyl control is enabled and scratching then also set isScratching
bool bVinylControlScratching = m_pVCScratching && m_pVCScratching->get() > 0.0;
if (bVinylControlEnabled && bVinylControlScratching) {
*isScratching = true;
}
if (paused) {
// Stopped. Wheel, jog and scratch controller all scrub through audio.
// New scratch behavior overrides old
if (scratchEnable) {
rate = scratchFactor + jogFactor + wheelFactor * 40.0;
} else {
// Just remove oldScratchFactor in future
rate = oldScratchFactor + jogFactor * 18 + wheelFactor;
}
} else {
// The buffer is playing, so calculate the buffer rate.
// There are four rate effects we apply: wheel, scratch, jog and temp.
// Wheel: a linear additive effect (no spring-back)
// Scratch: a rate multiplier
// Jog: a linear additive effect whose value is filtered (springs back)
// Temp: pitch bend
// New scratch behavior - overrides playback speed (and old behavior)
if (scratchEnable) {
rate = scratchFactor;
} else {
rate = 1. + getRawRate() + getTempRate();
rate += wheelFactor;
// Deprecated old scratch behavior
if (oldScratchFactor < 0.) {
rate *= (oldScratchFactor - 1.);
} else if (oldScratchFactor > 0.) {
rate *= (oldScratchFactor + 1.);
}
}
rate += jogFactor;
}
double currentSample = getCurrentSample();
m_pScratchController->process(currentSample, rate, iSamplesPerBuffer, baserate);
// If waveform scratch is enabled, override all other controls
if (m_pScratchController->isEnabled()) {
rate = m_pScratchController->getRate();
*isScratching = true;
}
// If master sync is on, respond to it -- but vinyl and scratch mode always override.
if (getSyncMode() == SYNC_FOLLOWER && !paused &&
!bVinylControlEnabled && !*isScratching) {
if (m_pBpmControl == NULL) {
qDebug() << "ERROR: calculateRate m_pBpmControl is null during master sync";
return 1.0;
}
rate = m_pBpmControl->getSyncedRate();
double userTweak = getTempRate() + wheelFactor + jogFactor;
bool userTweakingSync = userTweak != 0.0;
rate += userTweak;
rate *= m_pBpmControl->getSyncAdjustment(userTweakingSync);
}
// If we are reversing (and not scratching,) flip the rate. This is ok even when syncing.
if (!scratchEnable && m_pReverseButton->get()) {
rate = -rate;
}
}
return rate;
}
double RateControl::calculateSpeed(double baserate, double speed, bool paused,
int iSamplesPerBuffer,
bool* pReportScratching,
bool* pReportReverse) {
*pReportScratching = false;
*pReportReverse = false;
double rate = (paused ? 0 : 1.0);
double searching = m_pRateSearch->get();
if (searching) {
// If searching is in progress, it overrides everything else
rate = searching;
} else {
double wheelFactor = getWheelFactor();
double jogFactor = getJogFactor();
bool bVinylControlEnabled = m_pVCEnabled && m_pVCEnabled->toBool();
bool useScratch2Value = m_pScratch2Enable->get() != 0;
// By default scratch2_enable is enough to determine if the user is
// scratching or not. Moving platter controllers have to disable
// "scratch2_indicates_scratching" if they are not scratching,
// to allow things like key-lock.
if (useScratch2Value && m_pScratch2Scratching->get()) {
*pReportScratching = true;
}
if (bVinylControlEnabled) {
if (m_pVCScratching->toBool()) {
*pReportScratching = true;
}
rate = speed;
} else {
double scratchFactor = m_pScratch2->get();
// Don't trust values from m_pScratch2
if (isnan(scratchFactor)) {
scratchFactor = 0.0;
}
if (paused) {
// Stopped. Wheel, jog and scratch controller all scrub through audio.
if (useScratch2Value) {
rate = scratchFactor + jogFactor + wheelFactor * kWheelMultiplier;
} else {
rate = jogFactor * kPausedJogMultiplier + wheelFactor;
}
} else {
// The buffer is playing, so calculate the buffer rate.
// There are four rate effects we apply: wheel, scratch, jog and temp.
// Wheel: a linear additive effect (no spring-back)
// Scratch: a rate multiplier
// Jog: a linear additive effect whose value is filtered (springs back)
// Temp: pitch bend
// New scratch behavior - overrides playback speed (and old behavior)
if (useScratch2Value) {
rate = scratchFactor;
} else {
rate = speed + getTempRate();
rate += wheelFactor;
}
rate += jogFactor;
}
}
double currentSample = getCurrentSample();
m_pScratchController->process(currentSample, rate, iSamplesPerBuffer, baserate);
// If waveform scratch is enabled, override all other controls
if (m_pScratchController->isEnabled()) {
rate = m_pScratchController->getRate();
*pReportScratching = true;
} else {
// If master sync is on, respond to it -- but vinyl and scratch mode always override.
if (getSyncMode() == SYNC_FOLLOWER && !paused &&
!bVinylControlEnabled && !useScratch2Value) {
if (m_pBpmControl == NULL) {
qDebug() << "ERROR: calculateRate m_pBpmControl is null during master sync";
return 1.0;
}
double userTweak = 0.0;
if (!*pReportScratching) {
// Only report user tweak if the user is not scratching.
userTweak = getTempRate() + wheelFactor + jogFactor;
}
rate = m_pBpmControl->calcSyncedRate(userTweak);
}
// If we are reversing (and not scratching,) flip the rate. This is ok even when syncing.
// Reverse with vinyl is only ok if absolute mode isn't on.
int vcmode = m_pVCMode ? m_pVCMode->get() : MIXXX_VCMODE_ABSOLUTE;
// TODO(owen): Instead of just ignoring reverse mode, should we
// disable absolute mode instead?
if (m_pReverseButton->get()
&& !m_pScratch2Enable->get()
&& (!bVinylControlEnabled || vcmode != MIXXX_VCMODE_ABSOLUTE)) {
rate = -rate;
*pReportReverse = true;
}
}
}
return rate;
}