void EngineMaster::processChannels(unsigned int* busChannelConnectionFlags,
unsigned int* headphoneOutput,
int iBufferSize) {
ScopedTimer timer("EngineMaster::processChannels");
QList<ChannelInfo*>::iterator it = m_channels.begin();
QList<ChannelInfo*>::iterator master_it = NULL;
// Clear talkover compressor for the next round of gain calculation.
m_pTalkoverDucking->clearKeys();
// Find the Sync Master and process it first then process all the slaves
// (and skip the master).
EngineChannel* pMasterChannel = m_pMasterSync->getMaster();
if (pMasterChannel != NULL) {
for (unsigned int channel_number = 0;
it != m_channels.end(); ++it, ++channel_number) {
ChannelInfo* pChannelInfo = *it;
EngineChannel* pChannel = pChannelInfo->m_pChannel;
if (!pChannel || !pChannel->isActive()) {
continue;
}
if (pMasterChannel == pChannel) {
master_it = it;
// Proceed with the processing as below.
bool needsProcessing = false;
if (pChannel->isMaster()) {
busChannelConnectionFlags[pChannel->getOrientation()] |= (1 << channel_number);
needsProcessing = true;
}
// If the channel is enabled for previewing in headphones, copy it
// over to the headphone buffer
if (pChannel->isPFL()) {
*headphoneOutput |= (1 << channel_number);
needsProcessing = true;
}
// Process the buffer if necessary, which it damn well better be
if (needsProcessing) {
pChannel->process(pChannelInfo->m_pBuffer, iBufferSize);
if (m_pTalkoverDucking->getMode() != EngineTalkoverDucking::OFF &&
pChannel->isTalkover()) {
m_pTalkoverDucking->processKey(pChannelInfo->m_pBuffer, iBufferSize);
}
}
break;
}
}
}
it = m_channels.begin();
for (unsigned int channel_number = 0;
it != m_channels.end(); ++it, ++channel_number) {
ChannelInfo* pChannelInfo = *it;
EngineChannel* pChannel = pChannelInfo->m_pChannel;
// Skip the master since we already processed it.
if (it == master_it) {
continue;
}
// Skip inactive channels.
if (!pChannel || !pChannel->isActive()) {
continue;
}
bool needsProcessing = false;
if (pChannel->isMaster()) {
busChannelConnectionFlags[pChannel->getOrientation()] |= (1 << channel_number);
needsProcessing = true;
}
// If the channel is enabled for previewing in headphones, copy it
// over to the headphone buffer
if (pChannel->isPFL()) {
*headphoneOutput |= (1 << channel_number);
needsProcessing = true;
}
// Process the buffer if necessary
if (needsProcessing) {
pChannel->process(pChannelInfo->m_pBuffer, iBufferSize);
if (m_pTalkoverDucking->getMode() != EngineTalkoverDucking::OFF &&
pChannel->isTalkover()) {
m_pTalkoverDucking->processKey(pChannelInfo->m_pBuffer, iBufferSize);
}
}
}
}
void EngineMaster::process(const CSAMPLE *, const CSAMPLE *pOut, const int iBufferSize) {
static bool haveSetName = false;
if (!haveSetName) {
QThread::currentThread()->setObjectName("Engine");
haveSetName = true;
}
ScopedTimer t("EngineMaster::process");
CSAMPLE **pOutput = (CSAMPLE**)pOut;
Q_UNUSED(pOutput);
// Prepare each channel for output
// Bitvector of enabled channels
const unsigned int maxChannels = 32;
unsigned int masterOutput = 0;
unsigned int headphoneOutput = 0;
// Compute headphone mix
// Head phone left/right mix
float cf_val = head_mix->get();
float chead_gain = 0.5*(-cf_val+1.);
float cmaster_gain = 0.5*(cf_val+1.);
// qDebug() << "head val " << cf_val << ", head " << chead_gain
// << ", master " << cmaster_gain;
Timer timer("EngineMaster::process channels");
QList<ChannelInfo*>::iterator it = m_channels.begin();
for (unsigned int channel_number = 0;
it != m_channels.end(); ++it, ++channel_number) {
ChannelInfo* pChannelInfo = *it;
EngineChannel* pChannel = pChannelInfo->m_pChannel;
if (!pChannel->isActive()) {
continue;
}
bool needsProcessing = false;
if (pChannel->isMaster()) {
masterOutput |= (1 << channel_number);
needsProcessing = true;
}
// If the channel is enabled for previewing in headphones, copy it
// over to the headphone buffer
if (pChannel->isPFL()) {
headphoneOutput |= (1 << channel_number);
needsProcessing = true;
}
// Process the buffer if necessary
if (needsProcessing) {
pChannel->process(NULL, pChannelInfo->m_pBuffer, iBufferSize);
}
}
timer.elapsed(true);
// Mix all the enabled headphone channels together.
m_headphoneGain.setGain(chead_gain);
mixChannels(headphoneOutput, maxChannels, m_pHead, iBufferSize, &m_headphoneGain);
// Calculate the crossfader gains for left and right side of the crossfader
float c1_gain, c2_gain;
EngineXfader::getXfadeGains(c1_gain, c2_gain,
crossfader->get(), xFaderCurve->get(),
xFaderCalibration->get(),
xFaderMode->get()==MIXXX_XFADER_CONSTPWR,
xFaderReverse->get()==1.0);
// Now set the gains for overall volume and the left, center, right gains.
m_masterGain.setGains(m_pMasterVolume->get(), c1_gain, 1.0, c2_gain);
// Perform the master mix
mixChannels(masterOutput, maxChannels, m_pMaster, iBufferSize, &m_masterGain);
#ifdef __LADSPA__
// LADPSA master effects
ladspa->process(m_pMaster, m_pMaster, iBufferSize);
#endif
// Clipping
clipping->process(m_pMaster, m_pMaster, iBufferSize);
// Balance values
float balright = 1.;
float balleft = 1.;
float bal = m_pBalance->get();
if (bal>0.)
balleft -= bal;
else if (bal<0.)
balright += bal;
// Perform balancing on main out
SampleUtil::applyAlternatingGain(m_pMaster, balleft, balright, iBufferSize);
// Update VU meter (it does not return anything). Needs to be here so that
// master balance is reflected in the VU meter.
if (vumeter != NULL)
vumeter->process(m_pMaster, m_pMaster, iBufferSize);
//Submit master samples to the side chain to do shoutcasting, recording,
//etc. (cpu intensive non-realtime tasks)
if (m_pSideChain != NULL) {
m_pSideChain->writeSamples(m_pMaster, iBufferSize);
}
// Add master to headphone with appropriate gain
SampleUtil::addWithGain(m_pHead, m_pMaster, cmaster_gain, iBufferSize);
// Head volume and clipping
SampleUtil::applyGain(m_pHead, m_pHeadVolume->get(), iBufferSize);
head_clipping->process(m_pHead, m_pHead, iBufferSize);
//Master/headphones interleaving is now done in
//SoundManager::requestBuffer() - Albert Nov 18/07
// We're close to the end of the callback. Wake up the engine worker
// scheduler so that it runs the workers.
m_pWorkerScheduler->runWorkers();
}