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// enginemicrophone.cpp
// created 3/16/2011 by RJ Ryan (rryan@mit.edu)
#include "engine/enginemicrophone.h"
#include <QtDebug>
#include "preferences/usersettings.h"
#include "controlaudiotaperpot.h"
#include "effects/effectsmanager.h"
#include "engine/effects/engineeffectsmanager.h"
#include "util/sample.h"
EngineMicrophone::EngineMicrophone(const ChannelHandleAndGroup& handle_group,
EffectsManager* pEffectsManager)
: EngineChannel(handle_group, EngineChannel::CENTER),
m_pEngineEffectsManager(pEffectsManager ? pEffectsManager->getEngineEffectsManager() : NULL),
m_vuMeter(getGroup()),
m_pEnabled(new ControlObject(ConfigKey(getGroup(), "enabled"))),
m_pPregain(new ControlAudioTaperPot(ConfigKey(getGroup(), "pregain"), -12, 12, 0.5)),
m_sampleBuffer(NULL),
m_wasActive(false) {
if (pEffectsManager != NULL) {
pEffectsManager->registerChannel(handle_group);
}
setMaster(false); // Use "talkover" button to enable microphones
m_pSampleRate = new ControlObjectSlave("[Master]", "samplerate");
}
EngineMicrophone::~EngineMicrophone() {
delete m_pSampleRate;
delete m_pEnabled;
delete m_pPregain;
}
bool EngineMicrophone::isActive() {
bool enabled = m_pEnabled->get() > 0.0;
if (enabled && m_sampleBuffer) {
m_wasActive = true;
} else if (m_wasActive) {
m_vuMeter.reset();
m_wasActive = false;
}
return m_wasActive;
}
void EngineMicrophone::onInputConfigured(AudioInput input) {
if (input.getType() != AudioPath::MICROPHONE) {
// This is an error!
qWarning() << "EngineMicrophone connected to AudioInput for a non-Microphone type!";
return;
}
m_sampleBuffer = NULL;
m_pEnabled->set(1.0);
}
void EngineMicrophone::onInputUnconfigured(AudioInput input) {
if (input.getType() != AudioPath::MICROPHONE) {
// This is an error!
qWarning() << "EngineMicrophone connected to AudioInput for a non-Microphone type!";
return;
}
m_sampleBuffer = NULL;
m_pEnabled->set(0.0);
}
void EngineMicrophone::receiveBuffer(AudioInput input, const CSAMPLE* pBuffer,
unsigned int nFrames) {
Q_UNUSED(input);
Q_UNUSED(nFrames);
m_sampleBuffer = pBuffer;
}
void EngineMicrophone::process(CSAMPLE* pOut, const int iBufferSize) {
// If configured read into the output buffer.
// Otherwise, skip the appropriate number of samples to throw them away.
const CSAMPLE* sampleBuffer = m_sampleBuffer; // save pointer on stack
double pregain = m_pPregain->get();
if (sampleBuffer) {
SampleUtil::copyWithGain(pOut, sampleBuffer, pregain, iBufferSize);
} else {
SampleUtil::clear(pOut, iBufferSize);
}
m_sampleBuffer = NULL;
if (m_pEngineEffectsManager != NULL) {
// Process effects enabled for this channel
GroupFeatureState features;
// This is out of date by a callback but some effects will want the RMS
// volume.
m_vuMeter.collectFeatures(&features);
m_pEngineEffectsManager->process(getHandle(), pOut, iBufferSize,
m_pSampleRate->get(), features);
}
// Update VU meter
m_vuMeter.process(pOut, iBufferSize);
}
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