| 1 | // Copyright (C) 2022 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-3.0-only |
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| 3 | #ifndef QAMBISONICDECODER_P_H |
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| 4 | #define QAMBISONICDECODER_P_H |
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| 5 | |
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| 6 | // |
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| 7 | // W A R N I N G |
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| 8 | // ------------- |
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| 9 | // |
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| 10 | // This file is not part of the Qt API. It exists purely as an |
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| 11 | // implementation detail. This header file may change from version to |
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| 12 | // version without notice, or even be removed. |
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| 13 | // |
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| 14 | // We mean it. |
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| 15 | // |
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| 16 | |
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| 17 | #include <QtSpatialAudio/private/qtspatialaudioglobal_p.h> |
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| 18 | #include <QtMultimedia/qaudioformat.h> |
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| 19 | |
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| 20 | QT_BEGIN_NAMESPACE |
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| 21 | |
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| 22 | struct QAmbisonicDecoderData; |
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| 23 | class QAmbisonicDecoderFilter; |
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| 24 | |
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| 25 | class QAmbisonicDecoder |
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| 26 | { |
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| 27 | public: |
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| 28 | enum AmbisonicOrder { |
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| 29 | Ambisonic1stOrder = 1, |
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| 30 | LowQuality = Ambisonic1stOrder, |
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| 31 | Ambisonic2ndOrder = 2, |
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| 32 | MediumQuality = Ambisonic2ndOrder, |
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| 33 | Ambisonic3rdOrder = 3, |
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| 34 | HighQuality = Ambisonic3rdOrder |
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| 35 | }; |
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| 36 | QAmbisonicDecoder(AmbisonicOrder ambisonicOrder, const QAudioFormat &format); |
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| 37 | ~QAmbisonicDecoder(); |
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| 38 | |
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| 39 | bool hasValidConfig() const { return outputChannels > 0; } |
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| 40 | |
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| 41 | int nInputChannels() const { return inputChannels; } |
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| 42 | int nOutputChannels() const { return outputChannels; } |
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| 43 | |
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| 44 | int outputSize(int nSamples) const { return outputChannels * nSamples; } |
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| 45 | |
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| 46 | // input is planar, output interleaved |
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| 47 | void processBuffer(const float *input[], float *output, int nSamples); |
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| 48 | void processBuffer(const float *input[], short *output, int nSamples); |
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| 49 | |
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| 50 | void processBufferWithReverb(const float *input[], const float *reverb[2], short *output, int nSamples); |
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| 51 | |
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| 52 | static constexpr int maxAmbisonicChannels = 16; |
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| 53 | static constexpr int maxAmbisonicOrder = 3; |
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| 54 | |
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| 55 | private: |
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| 56 | QAudioFormat::ChannelConfig channelConfig; |
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| 57 | AmbisonicOrder order = Ambisonic1stOrder; |
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| 58 | int inputChannels = 0; |
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| 59 | int outputChannels = 0; |
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| 60 | const QAmbisonicDecoderData *decoderData = nullptr; |
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| 61 | QAmbisonicDecoderFilter *filters = nullptr; |
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| 62 | float *simpleDecoderFactors = nullptr; |
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| 63 | const float *reverbFactors = nullptr; |
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| 64 | }; |
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| 65 | |
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| 66 | |
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| 67 | QT_END_NAMESPACE |
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| 68 | |
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| 69 | #endif |
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| 70 | |
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