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#ifndef QAUDIOFORMAT_H
#define QAUDIOFORMAT_H

#include <QtCore/qobject.h>
#include <QtCore/qshareddata.h>

#include <QtMultimedia/qtmultimediaglobal.h>

QT_BEGIN_NAMESPACE

class QAudioFormatPrivate;

class QAudioFormat
{
public:
    enum SampleFormat {
        Unknown,
        UInt8,
        Int16,
        Int32,
        Float,
        NSampleFormats
    };

    constexpr bool isValid() const noexcept
    {
        return m_sampleRate > 0 && m_channelCount > 0 && m_sampleFormat != Unknown;
    }

    constexpr void setSampleRate(int sampleRate) noexcept { m_sampleRate = sampleRate; }
    constexpr int sampleRate() const noexcept { return m_sampleRate; }

    constexpr void setChannelCount(int channelCount) noexcept { m_channelCount = channelCount; }
    constexpr int channelCount() const noexcept { return m_channelCount; }

    constexpr void setSampleFormat(SampleFormat f) noexcept { m_sampleFormat = f; }
    constexpr SampleFormat sampleFormat() const noexcept { return m_sampleFormat; }

    // Helper functions
    Q_MULTIMEDIA_EXPORT qint32 bytesForDuration(qint64 duration) const;
    Q_MULTIMEDIA_EXPORT qint64 durationForBytes(qint32 byteCount) const;

    Q_MULTIMEDIA_EXPORT qint32 bytesForFrames(qint32 frameCount) const;
    Q_MULTIMEDIA_EXPORT qint32 framesForBytes(qint32 byteCount) const;

    Q_MULTIMEDIA_EXPORT qint32 framesForDuration(qint64 duration) const;
    Q_MULTIMEDIA_EXPORT qint64 durationForFrames(qint32 frameCount) const;

    constexpr int bytesPerFrame() const { return bytesPerSample()*channelCount(); }
    constexpr int bytesPerSample() const noexcept
    {
        switch (m_sampleFormat) {
        case Unknown:
        case NSampleFormats: return 0;
        case UInt8: return 1;
        case Int16: return 2;
        case Int32:
        case Float: return 4;
        }
        return 0;
    }

    Q_MULTIMEDIA_EXPORT float normalizedSampleValue(const void *sample) const;

    friend bool operator==(const QAudioFormat &a, const QAudioFormat &b)
    {
        return a.m_sampleRate == b.m_sampleRate &&
               a.m_channelCount == b.m_channelCount &&
               a.m_sampleFormat == b.m_sampleFormat;
    }
    friend bool operator!=(const QAudioFormat &a, const QAudioFormat &b)
    {
        return !(a == b);
    }

private:
    SampleFormat m_sampleFormat = SampleFormat::Unknown;
    int m_sampleRate = 0;
    short m_channelCount = 0;
    [[maybe_unused]]short bitfields = 0;
    [[maybe_unused]]quint64 reserved = 0;
};

#ifndef QT_NO_DEBUG_STREAM
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug, const QAudioFormat &);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug, QAudioFormat::SampleFormat);
#endif

Q_DECLARE_METATYPE(QAudioFormat)

QT_END_NAMESPACE

#endif  // QAUDIOFORMAT_H