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rffft_internal.c
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rffft_internal.c
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#include "rffft_internal.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
// Filename formats:
// - SatDump
// - 2023-08-05_08-02-00_16000000SPS_2274000000Hz.s8
// - 2023-08-05_18-02-45-534_16000000SPS_2284000000Hz.s16
// - 2023-08-05_18-02-45-1691258565.534000_16000000SPS_2284000000Hz.f32
// - 2023-08-07_16-36-47-1691426207.749000_2400000SPS_100000000Hz.wav
// s8: char, s16 short int, f32 float.
// SatDump also supports a compressed versions of s8/s16/f32 with .ziq
// extension. Those are not yet supported
// timestamp can have an added milliseconds field, configurable. This feature
// was broken during some time so files with this convention still exists.
// - GQRX:
// - gqrx_20230806_151838_428000000_200000_fc.raw
// format always float32
// - SDR Console:
// - 07-Aug-2023 181711.798 401.774MHz.wav
int rffft_params_from_filename(char * filename, double * samplerate, double * frequency, char * format, char * starttime) {
// Temp vars to hold parsed values
int p_year, p_month, p_day, p_hours, p_minutes, p_seconds, p_fractal_seconds;
int p_dummy_int;
double p_samplerate, p_frequency;
char p_month_string[16], p_format[16];
char p_dummy_string[128];
int parsed_tokens;
char * base_filename = basename(filename);
// Broken SatDump string with milliseconds activated
parsed_tokens = sscanf(
base_filename,
"%04d-%02d-%02d_%02d-%02d-%02d-%d.%06d_%lfSPS_%lfHz.%s",
&p_year,
&p_month,
&p_day,
&p_hours,
&p_minutes,
&p_seconds,
&p_dummy_int,
&p_fractal_seconds,
&p_samplerate,
&p_frequency,
p_format);
if (parsed_tokens == 11) {
*samplerate = p_samplerate;
*frequency = p_frequency;
if ((strlen(p_format) == 2) && (strncmp("s8", p_format, 2) == 0)) {
*format = 'c';
} else if ((strlen(p_format) == 3) && (strncmp("s16", p_format, 3) == 0)) {
*format = 'i';
} else if ((strlen(p_format) == 3) && (strncmp("f32", p_format, 3) == 0)) {
*format = 'f';
} else if ((strlen(p_format) == 3) && (strncmp("wav", p_format, 3) == 0)) {
*format = 'w';
} else {
printf("Unsupported SatDump format %s\n", p_format);
return -1;
}
snprintf(starttime, 32, "%04d-%02d-%02dT%02d:%02d:%02d.%03d", p_year, p_month, p_day, p_hours, p_minutes, p_seconds, p_fractal_seconds / 1000);
return 0;
}
// SatDump string with milliseconds activated
parsed_tokens = sscanf(
base_filename,
"%04d-%02d-%02d_%02d-%02d-%02d-%03d_%lfSPS_%lfHz.%s",
&p_year,
&p_month,
&p_day,
&p_hours,
&p_minutes,
&p_seconds,
&p_fractal_seconds,
&p_samplerate,
&p_frequency,
p_format);
if (parsed_tokens == 10) {
*samplerate = p_samplerate;
*frequency = p_frequency;
if ((strlen(p_format) == 2) && (strncmp("s8", p_format, 2) == 0)) {
*format = 'c';
} else if ((strlen(p_format) == 3) && (strncmp("s16", p_format, 3) == 0)) {
*format = 'i';
} else if ((strlen(p_format) == 3) && (strncmp("f32", p_format, 3) == 0)) {
*format = 'f';
} else if ((strlen(p_format) == 3) && (strncmp("wav", p_format, 3) == 0)) {
*format = 'w';
} else {
printf("Unsupported SatDump format %s\n", p_format);
return -1;
}
snprintf(starttime, 32, "%04d-%02d-%02dT%02d:%02d:%02d.%03d", p_year, p_month, p_day, p_hours, p_minutes, p_seconds, p_fractal_seconds);
return 0;
}
// SatDump string without milliseconds activated
parsed_tokens = sscanf(
base_filename,
"%04d-%02d-%02d_%02d-%02d-%02d_%lfSPS_%lfHz.%s",
&p_year,
&p_month,
&p_day,
&p_hours,
&p_minutes,
&p_seconds,
&p_samplerate,
&p_frequency,
p_format);
if (parsed_tokens == 9) {
*samplerate = p_samplerate;
*frequency = p_frequency;
if ((strlen(p_format) == 2) && (strncmp("s8", p_format, 2) == 0)) {
*format = 'c';
} else if ((strlen(p_format) == 3) && (strncmp("s16", p_format, 3) == 0)) {
*format = 'i';
} else if ((strlen(p_format) == 3) && (strncmp("f32", p_format, 3) == 0)) {
*format = 'f';
} else if ((strlen(p_format) == 3) && (strncmp("wav", p_format, 3) == 0)) {
*format = 'w';
} else {
printf("Unsupported SatDump format %s\n", p_format);
return -1;
}
snprintf(starttime, 32, "%04d-%02d-%02dT%02d:%02d:%02d", p_year, p_month, p_day, p_hours, p_minutes, p_seconds);
return 0;
}
// GQRX
parsed_tokens = sscanf(
base_filename,
"gqrx_%04d%02d%02d_%02d%02d%02d_%lf_%lf_%s.raw",
&p_year,
&p_month,
&p_day,
&p_hours,
&p_minutes,
&p_seconds,
&p_frequency,
&p_samplerate,
p_dummy_string);
if (parsed_tokens == 9) {
*samplerate = p_samplerate;
*frequency = p_frequency;
*format = 'f';
snprintf(starttime, 32, "%04d-%02d-%02dT%02d:%02d:%02d", p_year, p_month, p_day, p_hours, p_minutes, p_seconds);
return 0;
}
// SDR Console
parsed_tokens = sscanf(
base_filename,
"%02d-%3s-%04d %02d%02d%02d.%03d %lfMHz.wav",
&p_day,
p_month_string,
&p_year,
&p_hours,
&p_minutes,
&p_seconds,
&p_fractal_seconds,
&p_frequency);
if (parsed_tokens == 8) {
*samplerate = 0; // Will be set when opening the wav
*frequency = p_frequency * 1e6;
*format = 'w';
int month;
if ((strlen(p_month_string) == 3) && (strncmp("Jan", p_month_string, 3) == 0)) {
month = 1;
} else if ((strlen(p_month_string) == 3) && (strncmp("Feb", p_month_string, 3) == 0)) {
month = 2;
} else if ((strlen(p_month_string) == 3) && (strncmp("Mar", p_month_string, 3) == 0)) {
month = 3;
} else if ((strlen(p_month_string) == 3) && (strncmp("Apr", p_month_string, 3) == 0)) {
month = 4;
} else if ((strlen(p_month_string) == 3) && (strncmp("May", p_month_string, 3) == 0)) {
month = 5;
} else if ((strlen(p_month_string) == 3) && (strncmp("Jun", p_month_string, 3) == 0)) {
month = 6;
} else if ((strlen(p_month_string) == 3) && (strncmp("Jul", p_month_string, 3) == 0)) {
month = 7;
} else if ((strlen(p_month_string) == 3) && (strncmp("Aug", p_month_string, 3) == 0)) {
month = 8;
} else if ((strlen(p_month_string) == 3) && (strncmp("Sep", p_month_string, 3) == 0)) {
month = 9;
} else if ((strlen(p_month_string) == 3) && (strncmp("Oct", p_month_string, 3) == 0)) {
month = 10;
} else if ((strlen(p_month_string) == 3) && (strncmp("Nov", p_month_string, 3) == 0)) {
month = 11;
} else if ((strlen(p_month_string) == 3) && (strncmp("Dec", p_month_string, 3) == 0)) {
month = 12;
} else {
printf("Unparsable month in SDR Console format %s\n", p_format);
return -1;
}
snprintf(starttime, 32, "%04d-%02d-%02dT%02d:%02d:%02d.%03d", p_year, month, p_day, p_hours, p_minutes, p_seconds, p_fractal_seconds);
return 0;
}
return -1;
}