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44 lines
1.8 KiB
C
44 lines
1.8 KiB
C
/* Finite impulse response (FIR) resampler with adjustable FIR size */
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/* Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */
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/* Copyright (C) 2004-2006 Shay Green. This module is free software; you
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can redistribute it and/or modify it under the terms of the GNU Lesser
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General Public License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version. This
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module is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details. You should have received a copy of the GNU Lesser General Public
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License along with this module; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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/* C Conversion by Eke-Eke for use in Genesis Plus GX (2009). */
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#ifndef FIR_RESAMPLER_H
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#define FIR_RESAMPLER_H
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#define STEREO 2
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#define MAX_RES 32
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#define WIDTH 16
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#define WRITE_OFFSET (WIDTH * STEREO) - STEREO
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#define GAIN 1.0
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typedef signed int sample_t;
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extern int Fir_Resampler_initialize( int new_size );
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extern void Fir_Resampler_shutdown( void );
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extern void Fir_Resampler_clear( void );
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extern double Fir_Resampler_time_ratio( double new_factor, double rolloff );
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extern double Fir_Resampler_ratio( void );
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extern int Fir_Resampler_max_write( void );
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extern sample_t* Fir_Resampler_buffer( void );
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extern int Fir_Resampler_written( void );
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extern int Fir_Resampler_avail( void );
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extern void Fir_Resampler_write( long count );
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extern int Fir_Resampler_read( sample_t* out, long count );
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extern int Fir_Resampler_input_needed( long output_count );
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extern int Fir_Resampler_skip_input( long count );
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#endif
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