ref: f6dc1eba2615444d24cc84dfc2043d961418a035
dir: /libcelt/psy.h/
/* (C) 2007 Jean-Marc Valin, CSIRO
*/
/*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef PSY_H
#define PSY_H
#include "arch.h"
#include "celt.h"
struct PsyDecay {
/*celt_word16_t *decayL;*/
const celt_word16_t * restrict decayR;
};
/** Pre-compute the decay of the psycho-acoustic spreading function */
void psydecay_init(struct PsyDecay *decay, int len, celt_int32_t Fs);
/** Free the memory allocated for the spreading function */
void psydecay_clear(struct PsyDecay *decay);
/** Compute the masking curve for an input (DFT) spectrum X */
void compute_masking(const struct PsyDecay *decay, celt_word16_t *X, celt_mask_t *mask, int len);
/** Compute the masking curve for an input (MDCT) spectrum X */
void compute_mdct_masking(const struct PsyDecay *decay, celt_word32_t *X, celt_word16_t *tonality, celt_word16_t *long_window, celt_mask_t *mask, int len);
void compute_tonality(const CELTMode *m, celt_word16_t * restrict X, celt_word16_t * mem, int len, celt_word16_t *tonality, int mdct_size);
#endif /* PSY_H */