/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
*
* RetroArch 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.
*
* RetroArch 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 RetroArch.
* If not, see .
*/
// Resampler that reads raw S16NE/stereo from stdin and outputs to stdout in S16NE/stereo.
// Used for testing and performance benchmarking.
#include "../resampler.h"
#include "../utils.h"
#include
#include
#include
int main(int argc, char *argv[])
{
srand(time(NULL));
int16_t input_i[1024];
int16_t output_i[1024 * 8];
float input_f[1024];
float output_f[1024 * 8];
double ratio_max_deviation = 0.0;
if (argc < 3 || argc > 4)
{
fprintf(stderr, "Usage: %s [ratio deviation] (max ratio: 8.0)\n", argv[0]);
return 1;
}
else if (argc == 4)
{
ratio_max_deviation = fabs(strtod(argv[3], NULL));
fprintf(stderr, "Ratio deviation: %.4f.\n", ratio_max_deviation);
}
double in_rate = strtod(argv[1], NULL);
double out_rate = strtod(argv[2], NULL);
double ratio = out_rate / in_rate;
if (ratio >= 7.99)
{
fprintf(stderr, "Ratio is too high.\n");
return 1;
}
const rarch_resampler_t *resampler = NULL;
void *re = NULL;
if (!rarch_resampler_realloc(&re, &resampler, NULL, out_rate / in_rate))
{
fprintf(stderr, "Failed to allocate resampler ...\n");
return 1;
}
for (;;)
{
if (fread(input_i, sizeof(int16_t), 1024, stdin) != 1024)
break;
double uniform = (2.0 * rand()) / RAND_MAX - 1.0;
double rate_mod = 1.0 + ratio_max_deviation * uniform;
audio_convert_s16_to_float(input_f, input_i, 1024, 1.0f);
struct resampler_data data = {
.data_in = input_f,
.data_out = output_f,
.input_frames = sizeof(input_f) / (2 * sizeof(float)),
.ratio = ratio * rate_mod,
};
rarch_resampler_process(resampler, re, &data);
size_t output_samples = data.output_frames * 2;
audio_convert_float_to_s16(output_i, output_f, output_samples);
if (fwrite(output_i, sizeof(int16_t), output_samples, stdout) != output_samples)
break;
}
rarch_resampler_freep(&resampler, &re);
}