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52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
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*
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* Some code herein may be based on code found in BSNES.
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*
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* SSNES is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with SSNES.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __SSNES_RESAMPLER_H
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#define __SSNES_RESAMPLER_H
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#include <stddef.h>
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#include <math.h>
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// M_PI is left out of ISO C99 :(
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#ifndef M_PI
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#define M_PI 3.14159265358979323846264338327
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#endif
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typedef struct ssnes_resampler ssnes_resampler_t;
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struct resampler_data
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{
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const float *data_in;
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float *data_out;
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size_t input_frames;
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size_t output_frames;
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double ratio;
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};
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ssnes_resampler_t *resampler_new(void);
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void resampler_process(ssnes_resampler_t *re, struct resampler_data *data);
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void resampler_free(ssnes_resampler_t *re);
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// Generate a starting cosine pulse with given frequency for testing (SNR, etc) purposes.
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void resampler_preinit(ssnes_resampler_t *re, double omega, double *samples_offset);
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#endif
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