#ifndef AUDIODECODER_H
#define AUDIODECODER_H

#include <QIODevice>
#include <QAudioFormat>
#include <QAudioDecoder>

class AudioDecoder : public QIODevice
{
    Q_OBJECT

public:
    AudioDecoder(const QAudioFormat &format, qint64 durationUs, int sampleRate, QObject *parent);
    AudioDecoder(const QAudioFormat &format, QObject *parent);
    ~AudioDecoder();

    void start();
    void stop();

    qint64 readData(char *data, qint64 maxlen);
    qint64 writeData(const char *data, qint64 len);
    qint64 bytesAvailable() const;

    void loadMedia(QString file);

    void setPos(qint64 pos);

private:
    void generateData(const QAudioFormat &format, qint64 durationUs, int sampleRate);
    qint64 m_pos;
    QByteArray m_buffer;
    QAudioDecoder *m_decoder;

private slots:
    void readBuffer();
    void errorDecoding(QAudioDecoder::Error msg);
    void decoderFinished();
    void trackTimeChanged(qint64 dur);

signals:
    void totalTimeChanged(qint64 dur);
    void fileLoaded(QString file);
};

#endif // AUDIODECODER_H