#include "beattracker.hpp"

#include "audioprovider.hpp"
#include <QObject>
#include <aubio/aubio.h>

namespace caelestia {

BeatWorker::BeatWorker(uint_t sampleRate, uint_t hopSize, QObject* parent)
    : AudioWorker(static_cast<int>(sampleRate), static_cast<int>(hopSize), parent)
    , m_tempo(new_aubio_tempo("default", 1024, hopSize, sampleRate))
    , m_in(new_fvec(hopSize))
    , m_out(new_fvec(2)) {};

BeatWorker::~BeatWorker() {
    del_aubio_tempo(m_tempo);
    del_fvec(m_in);
    del_fvec(m_out);
}

void BeatWorker::processData() {
    process(m_in->data);
}

void BeatWorker::consumeData() {
    aubio_tempo_do(m_tempo, m_in, m_out);
    if (m_out->data[0] != 0.0f) {
        emit beat(aubio_tempo_get_bpm(m_tempo));
    }
}

BeatTracker::BeatTracker(uint_t sampleRate, uint_t hopSize, QObject* parent)
    : AudioProvider(parent)
    , m_bpm(120) {
    m_worker = new BeatWorker(sampleRate, hopSize, this);
    init();

    connect(static_cast<BeatWorker*>(m_worker), &BeatWorker::beat, this, &BeatTracker::updateBpm);
}

smpl_t BeatTracker::bpm() const {
    return m_bpm;
}

void BeatTracker::updateBpm(smpl_t bpm) {
    if (!qFuzzyCompare(bpm + 1.0f, m_bpm + 1.0f)) {
        m_bpm = bpm;
        emit bpmChanged();
    }
}

} // namespace caelestia