Alc/bformatdec.h

   1 #ifndef BFORMATDEC_H
   2 #define BFORMATDEC_H
   3
   4 #include "alMain.h"
   5
   6 struct AmbDecConf;
   7 struct BFormatDec;
   8 struct AmbiUpsampler;
   9
  10 enum BFormatDecFlags {
  11     BFDF_DistanceComp = 1<<0
  12 };
  13
  14 struct BFormatDec *bformatdec_alloc();
  15 void bformatdec_free(struct BFormatDec *dec);
  16 int bformatdec_getOrder(const struct BFormatDec *dec);
  17 void bformatdec_reset(struct BFormatDec *dec, const struct AmbDecConf *conf, ALuint chancount, ALuint srate, const ALuint chanmap[MAX_OUTPUT_CHANNELS], int flags);
  18
  19 /* Decodes the ambisonic input to the given output channels. */
  20 void bformatdec_process(struct BFormatDec *dec, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALuint OutChannels, const ALfloat (*restrict InSamples)[BUFFERSIZE], ALuint SamplesToDo);
  21
  22 /* Up-samples a first-order input to the decoder's configuration. */
  23 void bformatdec_upSample(struct BFormatDec *dec, ALfloat (*restrict OutBuffer)[BUFFERSIZE], const ALfloat (*restrict InSamples)[BUFFERSIZE], ALuint InChannels, ALuint SamplesToDo);
  24
  25
  26 /* Stand-alone first-order upsampler. Kept here because it shares some stuff
  27  * with bformatdec.
  28  */
  29 struct AmbiUpsampler *ambiup_alloc();
  30 void ambiup_free(struct AmbiUpsampler *ambiup);
  31 void ambiup_reset(struct AmbiUpsampler *ambiup, const ALCdevice *device);
  32
  33 void ambiup_process(struct AmbiUpsampler *ambiup, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALuint OutChannels, const ALfloat (*restrict InSamples)[BUFFERSIZE], ALuint SamplesToDo);
  34
  35
  36 /* Band splitter. Splits a signal into two phase-matching frequency bands. */
  37 typedef struct BandSplitter {
  38     ALfloat coeff;
  39     ALfloat lp_z1;
  40     ALfloat lp_z2;
  41     ALfloat hp_z1;
  42 } BandSplitter;
  43
  44 void bandsplit_init(BandSplitter *splitter, ALfloat freq_mult);
  45 void bandsplit_clear(BandSplitter *splitter);
  46 void bandsplit_process(BandSplitter *splitter, ALfloat *restrict hpout, ALfloat *restrict lpout,
  47                        const ALfloat *input, ALuint count);
  48
  49 #endif /* BFORMATDEC_H */