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#ifndef BFORMATDEC_H
#define BFORMATDEC_H
#include "alMain.h"
#include "filters/splitter.h"
#include "ambidefs.h"
#include "almalloc.h"
struct AmbDecConf;
using ChannelDec = ALfloat[MAX_AMBI_COEFFS];
class BFormatDec {
static constexpr size_t sHFBand{0};
static constexpr size_t sLFBand{1};
static constexpr size_t sNumBands{2};
ALuint mEnabled; /* Bitfield of enabled channels. */
union MatrixU {
ALfloat Dual[MAX_OUTPUT_CHANNELS][sNumBands][MAX_AMBI_COEFFS];
ALfloat Single[MAX_OUTPUT_CHANNELS][MAX_AMBI_COEFFS];
} mMatrix;
/* NOTE: BandSplitter filters are unused with single-band decoding */
BandSplitter mXOver[MAX_AMBI_COEFFS];
al::vector<std::array<ALfloat,BUFFERSIZE>, 16> mSamples;
/* These two alias into Samples */
std::array<ALfloat,BUFFERSIZE> *mSamplesHF;
std::array<ALfloat,BUFFERSIZE> *mSamplesLF;
SplitterAllpass mUpAllpass[MAX_OUTPUT_CHANNELS];
struct {
BandSplitter Splitter;
ALfloat Gains[sNumBands];
} mUpsampler[4];
ALsizei mNumChannels;
ALboolean mDualBand;
public:
void reset(const AmbDecConf *conf, bool allow_2band, ALsizei inchans, ALuint srate, const ALsizei (&chanmap)[MAX_OUTPUT_CHANNELS]);
void reset(const ALsizei inchans, const ALfloat xover_norm, const ALsizei chancount, const ChannelDec (&chancoeffs)[MAX_OUTPUT_CHANNELS], const ALsizei (&chanmap)[MAX_OUTPUT_CHANNELS]);
/* Decodes the ambisonic input to the given output channels. */
void process(ALfloat (*OutBuffer)[BUFFERSIZE], const ALsizei OutChannels, const ALfloat (*InSamples)[BUFFERSIZE], const ALsizei SamplesToDo);
/* Up-samples a first-order input to the decoder's configuration. */
void upSample(ALfloat (*OutBuffer)[BUFFERSIZE], const ALsizei OutChannels, const ALfloat (*InSamples)[BUFFERSIZE], const ALsizei InChannels, const ALsizei SamplesToDo);
DEF_NEWDEL(BFormatDec)
};
/* Stand-alone first-order upsampler. Kept here because it shares some stuff
* with bformatdec.
*/
class AmbiUpsampler {
static constexpr size_t sHFBand{0};
static constexpr size_t sLFBand{1};
static constexpr size_t sNumBands{2};
SplitterAllpass mAllpass[MAX_OUTPUT_CHANNELS];
alignas(16) ALfloat mSamples[sNumBands][BUFFERSIZE];
struct {
BandSplitter Splitter;
ALfloat Gains[sNumBands];
} mInput[4];
public:
void reset(const ALsizei out_order, const ALfloat xover_norm);
void process(ALfloat (*OutBuffer)[BUFFERSIZE], const ALsizei OutChannels, const ALfloat (*InSamples)[BUFFERSIZE], const ALsizei InChannels, const ALsizei SamplesToDo);
static std::array<ALfloat,MAX_AMBI_ORDER+1> GetHFOrderScales(const ALsizei in_order, const ALsizei out_order) noexcept;
DEF_NEWDEL(AmbiUpsampler)
};
#endif /* BFORMATDEC_H */
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