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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QAUDIOBUFFER_H
#define QAUDIOBUFFER_H
#include <QtCore/qshareddata.h>
#include <QtMultimedia/qtmultimediaglobal.h>
#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudioformat.h>
QT_BEGIN_NAMESPACE
namespace QtPrivate {
template <QAudioFormat::SampleFormat> struct AudioSampleFormatHelper
{
};
template <> struct AudioSampleFormatHelper<QAudioFormat::UInt8>
{
using value_type = unsigned char;
static constexpr value_type Default = 128;
};
template <> struct AudioSampleFormatHelper<QAudioFormat::Int16>
{
using value_type = short;
static constexpr value_type Default = 0;
};
template <> struct AudioSampleFormatHelper<QAudioFormat::Int32>
{
using value_type = int;
static constexpr value_type Default = 0;
};
template <> struct AudioSampleFormatHelper<QAudioFormat::Float>
{
using value_type = float;
static constexpr value_type Default = 0.;
};
}
template <QAudioFormat::ChannelConfig config, QAudioFormat::SampleFormat format>
struct QAudioFrame
{
private:
// popcount in qalgorithms.h is unfortunately not constexpr on MSVC.
// Use this here as a fallback
static constexpr int constexprPopcount(quint32 i)
{
i = i - ((i >> 1) & 0x55555555); // add pairs of bits
i = (i & 0x33333333) + ((i >> 2) & 0x33333333); // quads
i = (i + (i >> 4)) & 0x0F0F0F0F; // groups of 8
return (i * 0x01010101) >> 24; // horizontal sum of bytes
}
static constexpr int nChannels = constexprPopcount(config);
public:
using value_type = typename QtPrivate::AudioSampleFormatHelper<format>::value_type;
value_type channels[nChannels];
static constexpr int positionToIndex(QAudioFormat::AudioChannelPosition pos)
{
if (!(config & (1u << pos)))
return -1;
uint maskedChannels = config & ((1u << pos) - 1);
return qPopulationCount(maskedChannels);
}
value_type value(QAudioFormat::AudioChannelPosition pos) const {
int idx = positionToIndex(pos);
if (idx < 0)
return QtPrivate::AudioSampleFormatHelper<format>::Default;
return channels[idx];
}
void setValue(QAudioFormat::AudioChannelPosition pos, value_type val) const {
int idx = positionToIndex(pos);
if (idx < 0)
return;
channels[idx] = val;
}
value_type operator[](QAudioFormat::AudioChannelPosition pos) const {
return value(pos);
}
constexpr void clear() {
for (int i = 0; i < nChannels; ++i)
channels[i] = QtPrivate::AudioSampleFormatHelper<format>::Default;
}
};
template <QAudioFormat::SampleFormat Format>
using QAudioFrameMono = QAudioFrame<QAudioFormat::ChannelConfigMono, Format>;
template <QAudioFormat::SampleFormat Format>
using QAudioFrameStereo = QAudioFrame<QAudioFormat::ChannelConfigStereo, Format>;
template <QAudioFormat::SampleFormat Format>
using QAudioFrame2Dot1 = QAudioFrame<QAudioFormat::ChannelConfig2Dot1, Format>;
template <QAudioFormat::SampleFormat Format>
using QAudioFrameSurround5Dot1 = QAudioFrame<QAudioFormat::ChannelConfigSurround5Dot1, Format>;
template <QAudioFormat::SampleFormat Format>
using QAudioFrameSurround7Dot1 = QAudioFrame<QAudioFormat::ChannelConfigSurround7Dot1, Format>;
class QAudioBufferPrivate;
QT_DECLARE_QESDP_SPECIALIZATION_DTOR_WITH_EXPORT(QAudioBufferPrivate, Q_MULTIMEDIA_EXPORT)
class Q_MULTIMEDIA_EXPORT QAudioBuffer
{
public:
QAudioBuffer() noexcept;
QAudioBuffer(const QAudioBuffer &other) noexcept;
QAudioBuffer(const QByteArray &data, const QAudioFormat &format, qint64 startTime = -1);
QAudioBuffer(int numFrames, const QAudioFormat &format, qint64 startTime = -1); // Initialized to empty
~QAudioBuffer();
QAudioBuffer& operator=(const QAudioBuffer &other);
QAudioBuffer(QAudioBuffer &&other) noexcept = default;
QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QAudioBuffer)
void swap(QAudioBuffer &other) noexcept
{ qSwap(d, other.d); }
bool isValid() const noexcept { return d != nullptr; };
void detach();
QAudioFormat format() const noexcept;
qsizetype frameCount() const noexcept;
qsizetype sampleCount() const noexcept;
qsizetype byteCount() const noexcept;
qint64 duration() const noexcept;
qint64 startTime() const noexcept;
// Structures for easier access to data
typedef QAudioFrameMono<QAudioFormat::UInt8> U8M;
typedef QAudioFrameMono<QAudioFormat::Int16> S16M;
typedef QAudioFrameMono<QAudioFormat::Int32> S32M;
typedef QAudioFrameMono<QAudioFormat::Float> F32M;
typedef QAudioFrameStereo<QAudioFormat::UInt8> U8S;
typedef QAudioFrameStereo<QAudioFormat::Int16> S16S;
typedef QAudioFrameStereo<QAudioFormat::Int32> S32S;
typedef QAudioFrameStereo<QAudioFormat::Float> F32S;
template <typename T> const T* constData() const {
return static_cast<const T*>(constData());
}
template <typename T> const T* data() const {
return static_cast<const T*>(data());
}
template <typename T> T* data() {
return static_cast<T*>(data());
}
private:
const void* constData() const noexcept;
const void* data() const noexcept;
void *data();
QExplicitlySharedDataPointer<QAudioBufferPrivate> d;
};
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QAudioBuffer)
#endif // QAUDIOBUFFER_H
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