/* (C) 2007-2008 Jean-Marc Valin, CSIRO
*/
/**
   @file pitch.h
   @brief Pitch analysis
 */

/*
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   are met:
   
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   notice, this list of conditions and the following disclaimer.
   
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   notice, this list of conditions and the following disclaimer in the
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   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
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*/


#ifndef _PITCH_H
#define _PITCH_H

#include "kiss_fftr.h"
#include "psy.h"
#include "modes.h"

kiss_fftr_cfg pitch_state_alloc(int max_lag);
void pitch_state_free(kiss_fftr_cfg st);

/** Find the optimal delay for the pitch prediction. Computation is
    done in the frequency domain, both to save time and to make it
    easier to apply psychoacoustic weighting */
void find_spectral_pitch(const CELTMode *m, kiss_fftr_cfg fft, const struct PsyDecay *decay, const celt_sig_t *x, const celt_sig_t *y, const celt_word16_t *window, celt_word16_t * restrict X, int len, int max_pitch, int *pitch);

#endif