mirror of
https://github.com/libretro/RetroArch
synced 2025-01-01 12:11:47 +00:00
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2014-2016 - Ali Bouhlel ( aliaspider@gmail.com )
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*
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* RetroArch 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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* RetroArch 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 RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <math.h>
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#include "../audio_resampler_driver.h"
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typedef struct rarch_nearest_resampler
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{
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float fraction;
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} rarch_nearest_resampler_t;
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static void resampler_nearest_process(
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void *re_, struct resampler_data *data)
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{
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rarch_nearest_resampler_t *re = (rarch_nearest_resampler_t*)re_;
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audio_frame_float_t *inp = (audio_frame_float_t*)data->data_in;
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audio_frame_float_t *inp_max = (audio_frame_float_t*)inp + data->input_frames;
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audio_frame_float_t *outp = (audio_frame_float_t*)data->data_out;
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float ratio = 1.0 / data->ratio;
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while(inp != inp_max)
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{
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while(re->fraction > 1)
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{
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*outp++ = *inp;
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re->fraction -= ratio;
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}
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re->fraction++;
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inp++;
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}
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data->output_frames = (outp - (audio_frame_float_t*)data->data_out);
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}
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static void resampler_nearest_free(void *re_)
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{
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rarch_nearest_resampler_t *re = (rarch_nearest_resampler_t*)re_;
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if (re)
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free(re);
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}
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static void *resampler_nearest_init(const struct resampler_config *config,
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double bandwidth_mod, resampler_simd_mask_t mask)
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{
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rarch_nearest_resampler_t *re = (rarch_nearest_resampler_t*)
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calloc(1, sizeof(rarch_nearest_resampler_t));
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(void)config;
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(void)mask;
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if (!re)
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return NULL;
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re->fraction = 0;
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return re;
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}
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rarch_resampler_t nearest_resampler = {
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resampler_nearest_init,
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resampler_nearest_process,
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resampler_nearest_free,
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RESAMPLER_API_VERSION,
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"nearest",
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"nearest"
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};
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