RetroArch/audio/resampler.h

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/* SSNES - A frontend for libretro.
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* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
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*
* SSNES is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with SSNES.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __SSNES_RESAMPLER_H
#define __SSNES_RESAMPLER_H
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#include <stddef.h>
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#include <math.h>
// M_PI is left out of ISO C99 :(
#ifndef M_PI
#define M_PI 3.14159265358979323846264338327
#endif
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typedef struct ssnes_resampler ssnes_resampler_t;
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struct resampler_data
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{
const float *data_in;
float *data_out;
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size_t input_frames;
size_t output_frames;
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double ratio;
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};
ssnes_resampler_t *resampler_new(void);
void resampler_process(ssnes_resampler_t *re, struct resampler_data *data);
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