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libavcodec/acelp_filters.h

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00001 /*
00002  * various filters for ACELP-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_ACELP_FILTERS_H
00024 #define AVCODEC_ACELP_FILTERS_H
00025 
00026 #include <stdint.h>
00027 
00037 extern const int16_t ff_acelp_interp_filter[61];
00038 
00054 void ff_acelp_interpolate(
00055         int16_t* out,
00056         const int16_t* in,
00057         const int16_t* filter_coeffs,
00058         int precision,
00059         int frac_pos,
00060         int filter_length,
00061         int length);
00062 
00063 
00087 void ff_acelp_high_pass_filter(
00088         int16_t* out,
00089         int hpf_f[2],
00090         const int16_t* in,
00091         int length);
00092 
00093 #endif /* AVCODEC_ACELP_FILTERS_H */

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