celp_filters.h

/*
 * various filters for CELP-based codecs
 *
 * Copyright (c) 2008 Vladimir Voroshilov
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_CELP_FILTERS_H
#define AVCODEC_CELP_FILTERS_H

#include <stdint.h>

typedef struct CELPFContext {
    void (*celp_lp_synthesis_filterf)(float *out, const float *filter_coeffs,
                                      const float *in, int buffer_length,
                                      int filter_length);

    void (*celp_lp_zero_synthesis_filterf)(float *out, const float *filter_coeffs,
                                           const float *in, int buffer_length,
                                           int filter_length);

}CELPFContext;

void ff_celp_filter_init(CELPFContext *c);
void ff_celp_filter_init_mips(CELPFContext *c);

void ff_celp_convolve_circ(int16_t *fc_out, const int16_t *fc_in,
                           const int16_t *filter, int len);

void ff_celp_circ_addf(float *out, const float *in,
                       const float *lagged, int lag, float fac, int n);

int ff_celp_lp_synthesis_filter(int16_t *out, const int16_t *filter_coeffs,
                                const int16_t *in, int buffer_length,
                                int filter_length, int stop_on_overflow,
                                int shift, int rounder);

void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
                                  const float *in, int buffer_length,
                                  int filter_length);

void ff_celp_lp_zero_synthesis_filterf(float *out, const float *filter_coeffs,
                                       const float *in, int buffer_length,
                                       int filter_length);

#endif /* AVCODEC_CELP_FILTERS_H */