Libav 0.7.1
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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 Libav. 00007 * 00008 * Libav 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 * Libav 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 Libav; 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 00075 int ff_celp_lp_synthesis_filter(int16_t *out, const int16_t *filter_coeffs, 00076 const int16_t *in, int buffer_length, 00077 int filter_length, int stop_on_overflow, 00078 int rounder); 00079 00096 void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs, 00097 const float *in, int buffer_length, 00098 int filter_length); 00099 00115 void ff_celp_lp_zero_synthesis_filterf(float *out, const float *filter_coeffs, 00116 const float *in, int buffer_length, 00117 int filter_length); 00118 00119 #endif /* AVCODEC_CELP_FILTERS_H */