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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-3.0-only
#ifndef QAMBISONICDECODER_P_H
#define QAMBISONICDECODER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <qtspatialaudioglobal_p.h>
#include <qaudioformat.h>
QT_BEGIN_NAMESPACE
struct QAmbisonicDecoderData;
class QAmbisonicDecoderFilter;
class QAmbisonicDecoder
{
public:
enum AmbisonicLevel
{
AmbisonicLevel1 = 1,
LowQuality = AmbisonicLevel1,
AmbisonicLevel2 = 2,
MediumQuality = AmbisonicLevel2,
AmbisonicLevel3 = 3,
HighQuality = AmbisonicLevel3
};
QAmbisonicDecoder(AmbisonicLevel ambisonicLevel, const QAudioFormat &format);
~QAmbisonicDecoder();
bool hasValidConfig() const { return outputChannels > 0; }
int nInputChannels() const { return inputChannels; }
int nOutputChannels() const { return outputChannels; }
int outputSize(int nSamples) const { return outputChannels * nSamples; }
// input is planar, output interleaved
void processBuffer(const float *input[], float *output, int nSamples);
void processBuffer(const float *input[], short *output, int nSamples);
void processBufferWithReverb(const float *input[], const float *reverb[2], short *output, int nSamples);
static constexpr int maxAmbisonicChannels = 16;
static constexpr int maxAmbisonicLevel = 3;
private:
QAudioFormat::ChannelConfig channelConfig;
AmbisonicLevel level = AmbisonicLevel1;
int inputChannels = 0;
int outputChannels = 0;
const QAmbisonicDecoderData *decoderData = nullptr;
QAmbisonicDecoderFilter *filters = nullptr;
float *simpleDecoderFactors = nullptr;
const float *reverbFactors = nullptr;
};
QT_END_NAMESPACE
#endif
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