libavcodec/lsp.h

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/*
 * LSP computing for ACELP-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_LSP_H
#define AVCODEC_LSP_H

#include <stdint.h>

void ff_acelp_reorder_lsf(int16_t* lsfq, int lsfq_min_distance, int lsfq_min, int lsfq_max, int lp_order);

void ff_set_min_dist_lsf(float *lsf, double min_spacing, int size);

void ff_acelp_lsf2lsp(int16_t *lsp, const int16_t *lsf, int lp_order);

void ff_acelp_lsf2lspd(double *lsp, const float *lsf, int lp_order);

void ff_acelp_lsp2lpc(int16_t* lp, const int16_t* lsp, int lp_half_order);

void ff_amrwb_lsp2lpc(const double *lsp, float *lp, int lp_order);

void ff_acelp_lp_decode(int16_t* lp_1st, int16_t* lp_2nd, const int16_t* lsp_2nd, const int16_t* lsp_prev, int lp_order);


#define MAX_LP_HALF_ORDER 8
#define MAX_LP_ORDER      (2*MAX_LP_HALF_ORDER)

void ff_acelp_lspd2lpc(const double *lsp, float *lpc, int lp_half_order);

void ff_sort_nearly_sorted_floats(float *vals, int len);

void ff_lsp2polyf(const double *lsp, double *f, int lp_half_order);

#endif /* AVCODEC_LSP_H */

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