mirror of
https://github.com/libretro/RetroArch.git
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99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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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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// Resampler that reads raw S16NE/stereo from stdin and outputs to stdout in S16NE/stereo.
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// Used for testing and performance benchmarking.
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#include "../resamplers/resampler.h"
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#include "../utils.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#ifndef RESAMPLER_IDENT
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#define RESAMPLER_IDENT "sinc"
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#endif
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int main(int argc, char *argv[])
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{
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srand(time(NULL));
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int16_t input_i[1024];
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int16_t output_i[1024 * 8];
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float input_f[1024];
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float output_f[1024 * 8];
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double ratio_max_deviation = 0.0;
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if (argc < 3 || argc > 4)
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{
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fprintf(stderr, "Usage: %s <in-rate> <out-rate> [ratio deviation] (max ratio: 8.0)\n", argv[0]);
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return 1;
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}
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else if (argc == 4)
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{
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ratio_max_deviation = fabs(strtod(argv[3], NULL));
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fprintf(stderr, "Ratio deviation: %.4f.\n", ratio_max_deviation);
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}
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double in_rate = strtod(argv[1], NULL);
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double out_rate = strtod(argv[2], NULL);
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double ratio = out_rate / in_rate;
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if (ratio >= 7.99)
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{
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fprintf(stderr, "Ratio is too high.\n");
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return 1;
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}
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const rarch_resampler_t *resampler = NULL;
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void *re = NULL;
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if (!rarch_resampler_realloc(&re, &resampler, RESAMPLER_IDENT, out_rate / in_rate))
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{
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fprintf(stderr, "Failed to allocate resampler ...\n");
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return 1;
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}
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for (;;)
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{
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if (fread(input_i, sizeof(int16_t), 1024, stdin) != 1024)
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break;
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double uniform = (2.0 * rand()) / RAND_MAX - 1.0;
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double rate_mod = 1.0 + ratio_max_deviation * uniform;
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audio_convert_s16_to_float(input_f, input_i, 1024, 1.0f);
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struct resampler_data data = {
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.data_in = input_f,
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.data_out = output_f,
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.input_frames = sizeof(input_f) / (2 * sizeof(float)),
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.ratio = ratio * rate_mod,
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};
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rarch_resampler_process(resampler, re, &data);
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size_t output_samples = data.output_frames * 2;
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audio_convert_float_to_s16(output_i, output_f, output_samples);
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if (fwrite(output_i, sizeof(int16_t), output_samples, stdout) != output_samples)
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break;
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}
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rarch_resampler_freep(&resampler, &re);
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}
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