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36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
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/*
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TiMidity -- Experimental MIDI to WAVE converter
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Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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filter.h : written by Vincent Pagel ( pagel@loria.fr )
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implements fir antialiasing filter : should help when setting sample
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rates as low as 8Khz.
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*/
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/* Order of the FIR filter = 20 should be enough ! */
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#define ORDER 20
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#define ORDER2 ORDER/2
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#ifndef PI
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extern const float PI;
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#endif
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extern void antialiasing(Sample *sp, int32_t output_rate);
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