libavcodec/celp_filters.h
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00001 /*
00002  * various filters for CELP-based codecs
00003  *
00004  * Copyright (c) 2008 Vladimir Voroshilov
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #ifndef AVCODEC_CELP_FILTERS_H
00024 #define AVCODEC_CELP_FILTERS_H
00025 
00026 #include <stdint.h>
00027 
00039 void ff_celp_convolve_circ(int16_t *fc_out, const int16_t *fc_in,
00040                            const int16_t *filter, int len);
00041 
00054 void ff_celp_circ_addf(float *out, const float *in,
00055                        const float *lagged, int lag, float fac, int n);
00056 
00076 int ff_celp_lp_synthesis_filter(int16_t *out, const int16_t *filter_coeffs,
00077                                 const int16_t *in, int buffer_length,
00078                                 int filter_length, int stop_on_overflow,
00079                                 int shift, int rounder);
00080 
00097 void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
00098                                   const float *in, int buffer_length,
00099                                   int filter_length);
00100 
00116 void ff_celp_lp_zero_synthesis_filterf(float *out, const float *filter_coeffs,
00117                                        const float *in, int buffer_length,
00118                                        int filter_length);
00119 
00120 #endif /* AVCODEC_CELP_FILTERS_H */