🛠️🐜 Antkeeper superbuild with dependencies included
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56 lines
1.8 KiB
56 lines
1.8 KiB
#ifndef BFORMATDEC_H
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#define BFORMATDEC_H
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#include "alMain.h"
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#include "filters/splitter.h"
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#include "ambidefs.h"
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#include "almalloc.h"
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struct AmbDecConf;
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using ChannelDec = ALfloat[MAX_AMBI_CHANNELS];
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class BFormatDec {
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static constexpr size_t sHFBand{0};
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static constexpr size_t sLFBand{1};
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static constexpr size_t sNumBands{2};
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ALuint mEnabled{0u}; /* Bitfield of enabled channels. */
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union MatrixU {
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ALfloat Dual[MAX_OUTPUT_CHANNELS][sNumBands][MAX_AMBI_CHANNELS];
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ALfloat Single[MAX_OUTPUT_CHANNELS][MAX_AMBI_CHANNELS];
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} mMatrix{};
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/* NOTE: BandSplitter filters are unused with single-band decoding */
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BandSplitter mXOver[MAX_AMBI_CHANNELS];
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al::vector<std::array<ALfloat,BUFFERSIZE>, 16> mSamples;
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/* These two alias into Samples */
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std::array<ALfloat,BUFFERSIZE> *mSamplesHF{nullptr};
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std::array<ALfloat,BUFFERSIZE> *mSamplesLF{nullptr};
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ALsizei mNumChannels{0};
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bool mDualBand{false};
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public:
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BFormatDec(const AmbDecConf *conf, const bool allow_2band, const ALsizei inchans,
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const ALuint srate, const ALsizei (&chanmap)[MAX_OUTPUT_CHANNELS]);
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BFormatDec(const ALsizei inchans, const ALsizei chancount,
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const ChannelDec (&chancoeffs)[MAX_OUTPUT_CHANNELS],
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const ALsizei (&chanmap)[MAX_OUTPUT_CHANNELS]);
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/* Decodes the ambisonic input to the given output channels. */
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void process(ALfloat (*OutBuffer)[BUFFERSIZE], const ALsizei OutChannels,
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const ALfloat (*InSamples)[BUFFERSIZE], const ALsizei SamplesToDo);
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/* Retrieves per-order HF scaling factors for "upsampling" ambisonic data. */
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static std::array<ALfloat,MAX_AMBI_ORDER+1> GetHFOrderScales(const ALsizei in_order,
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const ALsizei out_order) noexcept;
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DEF_NEWDEL(BFormatDec)
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};
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#endif /* BFORMATDEC_H */
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