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( 00040 int16_t* fc_out, 00041 const int16_t* fc_in, 00042 const int16_t* filter, 00043 int len); 00044 00063 int ff_celp_lp_synthesis_filter( 00064 int16_t *out, 00065 const int16_t* filter_coeffs, 00066 const int16_t* in, 00067 int buffer_length, 00068 int filter_length, 00069 int stop_on_overflow, 00070 int rounder); 00071 00087 void ff_celp_lp_synthesis_filterf( 00088 float *out, 00089 const float* filter_coeffs, 00090 const float* in, 00091 int buffer_length, 00092 int filter_length); 00093 00094 #endif /* AVCODEC_CELP_FILTERS_H */