shithub: opus

ref: 069c3de65f8c3bfcb0c488fbb8aa7ab11a3eba78
dir: /libcelt/pitch.h/

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

/*
   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,
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   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/


#ifndef _PITCH_H
#define _PITCH_H

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

/** 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(kiss_fftr_cfg fft, struct PsyDecay *decay, const celt_sig_t *x, const celt_sig_t *y, const celt_word16_t *window, int overlap, int lag, int len, int C, int *pitch);

#endif