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#include "cavaprovider.hpp"
#include "audioprovider.hpp"
#include <QDebug>
#include <QObject>
#include <cava/cavacore.h>
#include <cmath>
#include <cstddef>
namespace caelestia {
CavaProcessor::CavaProcessor(AudioProvider* provider, QObject* parent)
: AudioProcessor(provider, parent)
, m_plan(nullptr)
, m_in(new double[static_cast<size_t>(m_chunkSize)])
, m_out(nullptr)
, m_bars(0) {};
CavaProcessor::~CavaProcessor() {
cleanup();
delete[] m_in;
}
void CavaProcessor::setBars(int bars) {
if (bars < 0) {
qWarning() << "CavaProcessor::setBars: bars must be greater than 0. Setting to 0.";
bars = 0;
}
if (m_bars != bars) {
m_bars = bars;
reload();
}
}
void CavaProcessor::reload() {
cleanup();
initCava();
}
void CavaProcessor::cleanup() {
if (!m_plan) {
return;
}
cava_destroy(m_plan);
m_plan = nullptr;
if (m_out) {
delete[] m_out;
m_out = nullptr;
}
}
void CavaProcessor::initCava() {
if (m_plan || m_bars == 0) {
return;
}
m_plan = cava_init(m_bars, static_cast<unsigned int>(m_sampleRate), 1, 1, 0.85, 50, 10000);
if (m_plan->status == -1) {
qWarning() << "CavaProcessor::initCava: failed to initialise cava plan";
cleanup();
return;
}
m_out = new double[static_cast<size_t>(m_bars)];
}
void CavaProcessor::processChunk(const QVector<double>& chunk) {
if (!m_plan || m_bars == 0) {
return;
}
std::copy(chunk.constBegin(), chunk.constEnd(), m_in);
// Process in data via cava
cava_execute(m_in, m_chunkSize, m_out, m_plan);
// Apply monstercat filter
for (int i = 0; i < m_bars; i++) {
for (int j = i - 1; j >= 0; j--) {
m_out[j] = std::max(m_out[i] / std::pow(1.5, i - j), m_out[j]);
}
for (int j = i + 1; j < m_bars; j++) {
m_out[j] = std::max(m_out[i] / std::pow(1.5, j - i), m_out[j]);
}
}
// Update values
QVector<double> values(m_bars);
std::copy(m_out, m_out + m_bars, values.begin());
if (values != m_values) {
m_values = std::move(values);
emit valuesChanged(m_values);
}
}
CavaProvider::CavaProvider(int sampleRate, int chunkSize, QObject* parent)
: AudioProvider(sampleRate, chunkSize, parent)
, m_bars(0)
, m_values(m_bars) {
m_processor = new CavaProcessor(this);
init();
connect(static_cast<CavaProcessor*>(m_processor), &CavaProcessor::valuesChanged, this, &CavaProvider::updateValues);
}
int CavaProvider::bars() const {
return m_bars;
}
void CavaProvider::setBars(int bars) {
if (bars < 0) {
qWarning() << "CavaProvider::setBars: bars must be greater than 0. Setting to 0.";
bars = 0;
}
if (m_bars == bars) {
return;
}
m_values.resize(bars);
m_bars = bars;
emit barsChanged();
emit valuesChanged();
QMetaObject::invokeMethod(m_processor, "setBars", Qt::QueuedConnection, Q_ARG(int, bars));
}
QVector<double> CavaProvider::values() const {
return m_values;
}
void CavaProvider::updateValues(QVector<double> values) {
if (values != m_values) {
m_values = std::move(values);
emit valuesChanged();
}
}
} // namespace caelestia
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