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/*
* Baseband Evaluation
*
* Functional and speed test for various baseband functions.
*
* Copyright (C) 2018 by Christian Zuckschwerdt <zany@triq.net>
*
* This program 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 Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#ifdef _MSC_VER
#include <BaseTsd.h>
typedef SSIZE_T ssize_t;
#endif
#ifdef _WIN32
#include <io.h>
#include <fcntl.h>
#ifdef _MSC_VER
#define F_OK 0
#define R_OK (1 << 2)
#endif
#endif
#ifndef _MSC_VER
#include <unistd.h>
#endif
#include <time.h>
#include "fatal.h"
#include "baseband.h"
#define MEASURE(label, block) \
do { \
clock_t start = clock(); \
block; \
clock_t stop = clock(); \
double elapsed = (double)(stop - start) * 1000.0 / CLOCKS_PER_SEC; \
printf("Time elapsed in ms: %f for: %s\n", elapsed, label); \
} while (0)
static int read_buf(const char *filename, void *buf, size_t nbyte)
{
int fd = open(filename, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "Failed to open %s\n", filename);
return -1;
}
ssize_t ret = read(fd, buf, nbyte);
close(fd);
return ret;
}
static int write_buf(const char *filename, const void *buf, size_t nbyte)
{
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd < 0) {
fprintf(stderr, "Failed to open %s\n", filename);
return -1;
}
ssize_t ret = write(fd, buf, nbyte);
close(fd);
return ret;
}
int main(int argc, char *argv[])
{
baseband_init();
uint8_t *cu8_buf;
uint16_t *y16_buf;
int16_t *cs16_buf;
uint32_t *y32_buf;
uint16_t *u16_buf;
uint32_t *u32_buf;
int16_t *s16_buf;
int32_t *s32_buf;
char *filename;
long n_read;
unsigned long n_samples;
int max_block_size = 4096000;
filter_state_t state;
demodfm_state_t fm_state;
if (argc <= 1) {
return 1;
}
filename = argv[1];
cu8_buf = malloc(sizeof(uint8_t) * 2 * max_block_size);
if (!cu8_buf) {
FATAL_MALLOC("main()");
}
n_read = read_buf(filename, cu8_buf, sizeof(uint8_t) * 2 * max_block_size);
if (n_read < 1) {
free(cu8_buf);
return 1;
}
y16_buf = malloc(sizeof(uint16_t) * max_block_size);
if (!y16_buf) {
FATAL_MALLOC("main()");
}
cs16_buf = malloc(sizeof(int16_t) * 2 * max_block_size);
if (!cs16_buf) {
FATAL_MALLOC("main()");
}
y32_buf = malloc(sizeof(uint32_t) * max_block_size);
if (!y32_buf) {
FATAL_MALLOC("main()");
}
u16_buf = malloc(sizeof(uint16_t) * max_block_size);
if (!u16_buf) {
FATAL_MALLOC("main()");
}
u32_buf = malloc(sizeof(uint32_t) * max_block_size);
if (!u32_buf) {
FATAL_MALLOC("main()");
}
s16_buf = malloc(sizeof(int16_t) * max_block_size);
if (!s16_buf) {
FATAL_MALLOC("main()");
}
s32_buf = malloc(sizeof(int32_t) * max_block_size);
if (!s32_buf) {
FATAL_MALLOC("main()");
}
n_samples = n_read / (sizeof(uint8_t) * 2);
for (unsigned long i = 0; i < n_samples * 2; i++) {
//cs16_buf[i] = 127 - cu8_buf[i];
//cs16_buf[i] = (int16_t)cu8_buf[i] * 16 - 2040;
cs16_buf[i] = (int16_t)cu8_buf[i] * 128 - 16320;
//cs16_buf[i] = (int16_t)cu8_buf[i] * 256 - 32640;
}
MEASURE("envelope_detect",
envelope_detect(cu8_buf, y16_buf, n_samples);
);
MEASURE("envelope_detect_nolut",
envelope_detect_nolut(cu8_buf, y16_buf, n_samples);
);
MEASURE("magnitude_est_cu8",
magnitude_est_cu8(cu8_buf, y16_buf, n_samples);
);
MEASURE("magnitude_true_cu8",
magnitude_true_cu8(cu8_buf, y16_buf, n_samples);
);
write_buf("bb.am.s16", y16_buf, sizeof(uint16_t) * n_samples);
MEASURE("baseband_low_pass_filter",
baseband_low_pass_filter(&state, y16_buf, (int16_t *)u16_buf, n_samples);
);
write_buf("bb.lp.am.s16", u16_buf, sizeof(int16_t) * n_samples);
MEASURE("baseband_demod_FM",
baseband_demod_FM(&fm_state, cu8_buf, s16_buf, n_samples, 250000, 0.1f);
);
write_buf("bb.fm.s16", s16_buf, sizeof(int16_t) * n_samples);
write_buf("bb.cs16", cs16_buf, sizeof(int16_t) * 2 * n_samples);
//envelope_detect_cs16(cs16_buf, y32_buf, n_samples);
//write_buf("bb.am.u32", y32_buf, sizeof(uint32_t) * n_samples);
//baseband_low_pass_filter_u32(&state, y32_buf, u32_buf, n_samples);
//write_buf("bb.lp.am.u32", u32_buf, sizeof(uint32_t) * n_samples);
MEASURE("magnitude_est_cs16",
magnitude_est_cs16(cs16_buf, y16_buf, n_samples);
);
MEASURE("magnitude_true_cs16",
magnitude_true_cs16(cs16_buf, y16_buf, n_samples);
);
write_buf("bb.mag.s16", y16_buf, sizeof(uint16_t) * n_samples);
MEASURE("baseband_low_pass_filter",
baseband_low_pass_filter(&state, y16_buf, (int16_t *)u16_buf, n_samples);
);
write_buf("bb.mag.lp.s16", u16_buf, sizeof(int16_t) * n_samples);
//baseband_demod_FM_cs16(&fm_state, cs16_buf, s32_buf, n_samples);
//write_buf("bb.fm.s32", s32_buf, sizeof(int32_t) * n_samples);
MEASURE("baseband_demod_FM_cs16",
baseband_demod_FM_cs16(&fm_state, cs16_buf, s16_buf, n_samples, 250000, 0.1f);
);
write_buf("bb.cs16.fm.s16", s16_buf, sizeof(int16_t) * n_samples);
free(cu8_buf);
free(y16_buf);
free(cs16_buf);
free(y32_buf);
free(u16_buf);
free(u32_buf);
free(s16_buf);
free(s32_buf);
}
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