#include "beattracker.hpp"

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

namespace ZShell::services {

BeatProcessor::BeatProcessor(QObject* parent)
	: AudioProcessor(parent)
	, m_tempo(new_aubio_tempo("default", 1024, ac::CHUNK_SIZE, ac::SAMPLE_RATE))
	, m_in(new_fvec(ac::CHUNK_SIZE))
	, m_out(new_fvec(2)) {
};

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

void BeatProcessor::process() {
	if (!m_tempo || !m_in) {
		return;
	}

	AudioCollector::instance().readChunk(m_in->data);

	aubio_tempo_do(m_tempo, m_in, m_out);
	if (!qFuzzyIsNull(m_out->data[0])) {
		emit beat(aubio_tempo_get_bpm(m_tempo));
	}
}

BeatTracker::BeatTracker(QObject* parent)
	: AudioProvider(parent)
	, m_bpm(120) {
	m_processor = new BeatProcessor();
	init();

	connect(static_cast<BeatProcessor*>(m_processor), &BeatProcessor::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 ZShell::services
