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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QAUDIOFORMAT_H
#define QAUDIOFORMAT_H
#include <QtCore/qobject.h>
#include <QtCore/qshareddata.h>
#include <QtMultimedia/qtmultimediaglobal.h>
QT_BEGIN_NAMESPACE
class QAudioFormatPrivate;
namespace QtPrivate {
template <typename... Args>
constexpr int channelConfig(Args... values) {
return (0 | ... | (1u << values));
}
}
class QAudioFormat
{
public:
enum SampleFormat : quint16 {
Unknown,
UInt8,
Int16,
Int32,
Float,
NSampleFormats
};
// This matches the speaker positions of a 22.2 audio layout. Stereo, Surround 5.1 and Surround 7.1 are subsets of these
enum AudioChannelPosition {
UnknownPosition,
FrontLeft,
FrontRight,
FrontCenter,
LFE,
BackLeft,
BackRight,
FrontLeftOfCenter,
FrontRightOfCenter,
BackCenter,
SideLeft,
SideRight,
TopCenter,
TopFrontLeft,
TopFrontCenter,
TopFrontRight,
TopBackLeft,
TopBackCenter,
TopBackRight,
LFE2,
TopSideLeft,
TopSideRight,
BottomFrontCenter,
BottomFrontLeft,
BottomFrontRight
};
static constexpr int NChannelPositions = BottomFrontRight + 1;
enum ChannelConfig : quint32 {
ChannelConfigUnknown = 0,
ChannelConfigMono = QtPrivate::channelConfig(FrontCenter),
ChannelConfigStereo = QtPrivate::channelConfig(FrontLeft, FrontRight),
ChannelConfig2Dot1 = QtPrivate::channelConfig(FrontLeft, FrontRight, LFE),
ChannelConfig3Dot0 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter),
ChannelConfig3Dot1 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, LFE),
ChannelConfigSurround5Dot0 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, BackLeft, BackRight),
ChannelConfigSurround5Dot1 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, LFE, BackLeft, BackRight),
ChannelConfigSurround7Dot0 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, BackLeft, BackRight, SideLeft, SideRight),
ChannelConfigSurround7Dot1 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, LFE, BackLeft, BackRight, SideLeft, SideRight),
};
template <typename... Args>
static constexpr ChannelConfig channelConfig(Args... channels)
{
return ChannelConfig(QtPrivate::channelConfig(channels...));
}
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; }
Q_MULTIMEDIA_EXPORT void setChannelConfig(ChannelConfig config) noexcept;
constexpr ChannelConfig channelConfig() const noexcept { return m_channelConfig; }
constexpr void setChannelCount(int channelCount) noexcept { m_channelConfig = ChannelConfigUnknown; m_channelCount = channelCount; }
constexpr int channelCount() const noexcept { return m_channelCount; }
Q_MULTIMEDIA_EXPORT int channelOffset(AudioChannelPosition channel) const noexcept;
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 microseconds) 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 microseconds) 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);
}
static Q_MULTIMEDIA_EXPORT ChannelConfig defaultChannelConfigForChannelCount(int channelCount);
private:
SampleFormat m_sampleFormat = SampleFormat::Unknown;
short m_channelCount = 0;
ChannelConfig m_channelConfig = ChannelConfigUnknown;
int m_sampleRate = 0;
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
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QAudioFormat)
#endif // QAUDIOFORMAT_H
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