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#include <QtDebug>
#include <replaygain.h>
#include "sampleutil.h"
#include "trackinfoobject.h"
#include "analyserrg.h"
#include "util/math.h"
AnalyserGain::AnalyserGain(ConfigObject<ConfigValue> *_config) {
m_pConfigReplayGain = _config;
m_bStepControl = false;
m_pLeftTempBuffer = NULL;
m_pRightTempBuffer = NULL;
m_iBufferSize = 0;
m_pReplayGain = new ReplayGain();
}
AnalyserGain::~AnalyserGain() {
delete [] m_pLeftTempBuffer;
delete [] m_pRightTempBuffer;
delete m_pReplayGain;
}
bool AnalyserGain::initialise(TrackPointer tio, int sampleRate, int totalSamples) {
if (loadStored(tio) || totalSamples == 0) {
return false;
}
m_bStepControl = m_pReplayGain->initialise((long)sampleRate, 2);
return true;
}
bool AnalyserGain::loadStored(TrackPointer tio) const {
bool bAnalyserEnabled = (bool)m_pConfigReplayGain->getValueString(ConfigKey("[ReplayGain]","ReplayGainAnalyserEnabled")).toInt();
float fReplayGain = tio->getReplayGain();
if (fReplayGain != 0 || !bAnalyserEnabled) {
return true;
}
return false;
}
void AnalyserGain::cleanup(TrackPointer tio) {
m_bStepControl = false;
Q_UNUSED(tio);
}
void AnalyserGain::process(const CSAMPLE *pIn, const int iLen) {
if(!m_bStepControl)
return;
int halfLength = static_cast<int>(iLen / 2);
if (halfLength > m_iBufferSize) {
delete [] m_pLeftTempBuffer;
delete [] m_pRightTempBuffer;
m_pLeftTempBuffer = new CSAMPLE[halfLength];
m_pRightTempBuffer = new CSAMPLE[halfLength];
}
SampleUtil::deinterleaveBuffer(m_pLeftTempBuffer, m_pRightTempBuffer, pIn, halfLength);
SampleUtil::applyGain(m_pLeftTempBuffer, 32767, halfLength);
SampleUtil::applyGain(m_pRightTempBuffer, 32767, halfLength);
m_bStepControl = m_pReplayGain->process(m_pLeftTempBuffer, m_pRightTempBuffer, halfLength);
}
void AnalyserGain::finalise(TrackPointer tio) {
//TODO: We are going to store values as relative peaks so that "0" means that no replaygain has been evaluated.
// This means that we are going to transform from dB to peaks and viceversa.
// One may think to digg into replay_gain code and modify it so that
// it directly sends results as relative peaks.
// In that way there is no need to spend resources in calculating log10 or pow.
if(!m_bStepControl)
return;
float ReplayGainOutput = m_pReplayGain->end();
if (ReplayGainOutput == GAIN_NOT_ENOUGH_SAMPLES) {
qDebug() << "ReplayGain analysis failed:" << ReplayGainOutput;
m_bStepControl = false;
return;
}
float fReplayGain_Result = db2ratio(ReplayGainOutput);
//qDebug() << "ReplayGain result is" << ReplayGainOutput << "pow:" << fReplayGain_Result;
//qDebug()<<"ReplayGain outputs "<< ReplayGainOutput << "db for track "<< tio->getFilename();
tio->setReplayGain(fReplayGain_Result);
//if(fReplayGain_Result) qDebug() << "ReplayGain Analyser found a ReplayGain value of "<< 20*log10(fReplayGain_Result) << "dB for track " << (tio->getFilename());
m_bStepControl=false;
}
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