shithub: opus

ref: de67858765a7b23e2cb31eead26b400937ff2d0b
dir: /libcelt/quant_bands.h/

/* (C) 2007 Jean-Marc Valin, CSIRO
  */
/*
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   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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*/

#ifndef QUANT_BANDS
#define QUANT_BANDS

#include "arch.h"
#include "modes.h"
#include "entenc.h"
#include "entdec.h"
#include "mathops.h"

static inline celt_word16_t amp2Log(celt_word32_t amp)
{
	return celt_log2(MAX32(QCONST32(.001f,14),SHL32(amp,2)));
}

static inline celt_word32_t log2Amp(celt_word16_t lg)
{
	return PSHR32(celt_exp2(SHL16(lg,3)),4);
}

int *quant_prob_alloc(const CELTMode *m);
void quant_prob_free(int *freq);

void compute_fine_allocation(const CELTMode *m, int *bits, int budget);

int intra_decision(celt_word16_t *eBands, celt_word16_t *oldEBands, int len);

unsigned quant_coarse_energy(const CELTMode *m, celt_word16_t *eBands, celt_word16_t *oldEBands, int budget, int intra, int *prob, celt_word16_t *error, ec_enc *enc);

void quant_fine_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, celt_word16_t *error, int *fine_quant, ec_enc *enc);

void quant_energy_finalise(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, celt_word16_t *error, int *fine_quant, int *fine_priority, int bits_left, ec_enc *enc);

void unquant_coarse_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int budget, int intra, int *prob, ec_dec *dec);

void unquant_fine_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int *fine_quant, ec_dec *dec);

void unquant_energy_finalise(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int *fine_quant, int *fine_priority, int bits_left, ec_dec *dec);

#endif /* QUANT_BANDS */