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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "utils.h"
#include <QAudioFormat>
qreal nyquistFrequency(const QAudioFormat &format)
{
return format.sampleRate() / 2;
}
QString formatToString(const QAudioFormat &format)
{
QString result;
if (QAudioFormat() != format) {
QString formatType;
switch (format.sampleFormat()) {
case QAudioFormat::UInt8:
formatType = "Unsigned8";
break;
case QAudioFormat::Int16:
formatType = "Signed16";
break;
case QAudioFormat::Int32:
formatType = "Signed32";
break;
case QAudioFormat::Float:
formatType = "Float";
break;
default:
formatType = "Unknown";
break;
}
QString formatChannels = QStringLiteral("%1 channels").arg(format.channelCount());
switch (format.channelCount()) {
case 1:
formatChannels = "mono";
break;
case 2:
formatChannels = "stereo";
break;
}
result = QStringLiteral("%1 Hz %2 bit %3 %4")
.arg(format.sampleRate())
.arg(format.bytesPerSample() * 8)
.arg(formatType)
.arg(formatChannels);
}
return result;
}
const qint16 PCMS16MaxValue = 32767;
const quint16 PCMS16MaxAmplitude = 32768; // because minimum is -32768
qreal pcmToReal(qint16 pcm)
{
return qreal(pcm) / PCMS16MaxAmplitude;
}
qint16 realToPcm(qreal real)
{
return real * PCMS16MaxValue;
}
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