50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
#ifndef BFORMATDEC_H
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#define BFORMATDEC_H
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#include "alMain.h"
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struct AmbDecConf;
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struct BFormatDec;
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struct AmbiUpsampler;
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enum BFormatDecFlags {
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BFDF_DistanceComp = 1<<0
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};
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struct BFormatDec *bformatdec_alloc();
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void bformatdec_free(struct BFormatDec *dec);
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int bformatdec_getOrder(const struct BFormatDec *dec);
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void bformatdec_reset(struct BFormatDec *dec, const struct AmbDecConf *conf, ALuint chancount, ALuint srate, const ALuint chanmap[MAX_OUTPUT_CHANNELS], int flags);
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/* Decodes the ambisonic input to the given output channels. */
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void bformatdec_process(struct BFormatDec *dec, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALuint OutChannels, const ALfloat (*restrict InSamples)[BUFFERSIZE], ALuint SamplesToDo);
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/* Up-samples a first-order input to the decoder's configuration. */
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void bformatdec_upSample(struct BFormatDec *dec, ALfloat (*restrict OutBuffer)[BUFFERSIZE], const ALfloat (*restrict InSamples)[BUFFERSIZE], ALuint InChannels, ALuint SamplesToDo);
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/* Stand-alone first-order upsampler. Kept here because it shares some stuff
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* with bformatdec.
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*/
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struct AmbiUpsampler *ambiup_alloc();
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void ambiup_free(struct AmbiUpsampler *ambiup);
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void ambiup_reset(struct AmbiUpsampler *ambiup, const ALCdevice *device);
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void ambiup_process(struct AmbiUpsampler *ambiup, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALuint OutChannels, const ALfloat (*restrict InSamples)[BUFFERSIZE], ALuint SamplesToDo);
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/* Band splitter. Splits a signal into two phase-matching frequency bands. */
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typedef struct BandSplitter {
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ALfloat coeff;
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ALfloat lp_z1;
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ALfloat lp_z2;
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ALfloat hp_z1;
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} BandSplitter;
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void bandsplit_init(BandSplitter *splitter, ALfloat freq_mult);
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void bandsplit_clear(BandSplitter *splitter);
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void bandsplit_process(BandSplitter *splitter, ALfloat *restrict hpout, ALfloat *restrict lpout,
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const ALfloat *input, ALuint count);
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#endif /* BFORMATDEC_H */
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