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rtl_433/src/fileformat.c

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/** @file
Various utility functions handling file formats.
Copyright (C) 2018 Christian Zuckschwerdt
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 <string.h>
#include <stdlib.h>
#ifdef _MSC_VER
#ifndef strncasecmp // Microsoft Visual Studio
#define strncasecmp _strnicmp
#endif
#else
#include <strings.h>
#endif
//#include "optparse.h"
#include "fileformat.h"
#ifdef _WIN32
#define PATH_SEPARATOR '\\'
#else
#define PATH_SEPARATOR '/'
#endif
char const *file_basename(char const *path)
{
char const *p = strrchr(path, PATH_SEPARATOR);
if (p)
return p + 1;
else
return path;
}
void file_info_clear(file_info_t *info)
{
if (info) {
*info = (file_info_t const){0};
}
}
void file_info_check_read(file_info_t *info)
{
if (info->format != CU8_IQ
&& info->format != CS8_IQ
&& info->format != CS16_IQ
&& info->format != CF32_IQ
&& info->format != S16_AM
&& info->format != PULSE_OOK) {
fprintf(stderr, "File type not supported as input (%s).\n", info->spec);
exit(1);
}
}
void file_info_check_write(file_info_t *info)
{
if (info->format != CU8_IQ
&& info->format != CS8_IQ
&& info->format != S16_AM
&& info->format != S16_FM
&& info->format != CS16_IQ
&& info->format != CF32_IQ
&& info->format != F32_AM
&& info->format != F32_FM
&& info->format != F32_I
&& info->format != F32_Q
&& info->format != U8_LOGIC
&& info->format != VCD_LOGIC) {
fprintf(stderr, "File type not supported as output (%s).\n", info->spec);
exit(1);
}
}
char const *file_info_string(file_info_t *info)
{
switch (info->format) {
case CU8_IQ: return "CU8 IQ (2ch uint8)";
case S16_AM: return "S16 AM (1ch int16)";
case S16_FM: return "S16 FM (1ch int16)";
case CF32_IQ: return "CF32 IQ (2ch float32)";
case CS16_IQ: return "CS16 IQ (2ch int16)";
case F32_AM: return "F32 AM (1ch float32)";
case F32_FM: return "F32 FM (1ch float32)";
case F32_I: return "F32 I (1ch float32)";
case F32_Q: return "F32 Q (1ch float32)";
case VCD_LOGIC: return "VCD logic (text)";
case U8_LOGIC: return "U8 logic (1ch uint8)";
case PULSE_OOK: return "OOK pulse data (text)";
default: return "Unknown";
}
}
static void file_type_set_format(uint32_t *type, uint32_t val)
{
*type = (*type & 0xffff0000) | val;
}
static void file_type_set_content(uint32_t *type, uint32_t val)
{
*type = (*type & 0x0000ffff) | val;
}
static uint32_t file_type_guess_auto_format(uint32_t type)
{
if (type == 0) return CU8_IQ;
else if (type == F_IQ) return CU8_IQ;
else if (type == F_AM) return S16_AM;
else if (type == F_FM) return S16_FM;
else if (type == F_I) return F32_I;
else if (type == F_Q) return F32_Q;
else if (type == F_LOGIC) return U8_LOGIC;
else if (type == F_CU8) return CU8_IQ;
else if (type == F_CS8) return CS8_IQ;
else if (type == F_S16) return S16_AM;
else if (type == F_U8) return U8_LOGIC;
else if (type == F_VCD) return VCD_LOGIC;
else if (type == F_OOK) return PULSE_OOK;
else if (type == F_CS16) return CS16_IQ;
else if (type == F_CF32) return CF32_IQ;
else return type;
}
static void file_type(char const *filename, file_info_t *info)
{
if (!filename || !*filename) {
return;
}
char const *p = filename;
while (*p) {
if (*p >= '0' && *p <= '9') {
char const *n = p; // number starts here
while (*p >= '0' && *p <= '9')
++p;
if (*p == '.') {
++p;
// if not [0-9] after '.' abort
if (*p < '0' || *p > '9')
continue;
while (*p >= '0' && *p <= '9')
++p;
}
char const *s = p; // number ends and unit starts here
while ((*p >= 'A' && *p <= 'Z')
|| (*p >= 'a' && *p <= 'z'))
++p;
double num = atof(n); // atouint32_metric() ?
size_t len = p - s;
double scale = 1.0;
switch (*s) {
case 'k':
case 'K':
scale *= 1e3;
break;
case 'M':
case 'm':
scale *= 1e6;
break;
case 'G':
case 'g':
scale *= 1e9;
break;
}
if (len == 1 && !strncasecmp("M", s, 1)) info->center_frequency = num * 1e6;
else if (len == 1 && !strncasecmp("k", s, 1)) info->sample_rate = num * 1e3;
else if (len == 2 && !strncasecmp("Hz", s, 2)) info->center_frequency = num;
else if (len == 3 && !strncasecmp("sps", s, 3)) info->sample_rate = num;
else if (len == 3 && !strncasecmp("Hz", s+1, 2) && scale > 1.0) info->center_frequency = num * scale;
else if (len == 4 && !strncasecmp("sps", s+1, 3) && scale > 1.0) info->sample_rate = num * scale;
//fprintf(stderr, "Got number %g, f is %u, s is %u\n", num, info->center_frequency, info->sample_rate);
} else if ((*p >= 'A' && *p <= 'Z')
|| (*p >= 'a' && *p <= 'z')) {
char const *t = p; // type starts here
while ((*p >= '0' && *p <= '9')
|| (*p >= 'A' && *p <= 'Z')
|| (*p >= 'a' && *p <= 'z'))
++p;
size_t len = p - t;
if (len == 1 && !strncasecmp("i", t, 1)) file_type_set_content(&info->format, F_I);
else if (len == 1 && !strncasecmp("q", t, 1)) file_type_set_content(&info->format, F_Q);
else if (len == 2 && !strncasecmp("iq", t, 2)) file_type_set_content(&info->format, F_IQ);
else if (len == 2 && !strncasecmp("am", t, 2)) file_type_set_content(&info->format, F_AM);
else if (len == 2 && !strncasecmp("fm", t, 2)) file_type_set_content(&info->format, F_FM);
else if (len == 2 && !strncasecmp("u8", t, 2)) file_type_set_format(&info->format, F_U8);
else if (len == 2 && !strncasecmp("s8", t, 2)) file_type_set_format(&info->format, F_S8);
else if (len == 3 && !strncasecmp("cu8", t, 3)) file_type_set_format(&info->format, F_CU8);
else if (len == 4 && !strncasecmp("data", t, 4)) file_type_set_format(&info->format, F_CU8); // compat
else if (len == 3 && !strncasecmp("cs8", t, 3)) file_type_set_format(&info->format, F_CS8);
else if (len == 3 && !strncasecmp("u16", t, 3)) file_type_set_format(&info->format, F_U16);
else if (len == 3 && !strncasecmp("s16", t, 3)) file_type_set_format(&info->format, F_S16);
else if (len == 3 && !strncasecmp("u32", t, 3)) file_type_set_format(&info->format, F_U32);
else if (len == 3 && !strncasecmp("s32", t, 3)) file_type_set_format(&info->format, F_S32);
else if (len == 3 && !strncasecmp("f32", t, 3)) file_type_set_format(&info->format, F_F32);
else if (len == 3 && !strncasecmp("vcd", t, 3)) file_type_set_content(&info->format, F_VCD);
else if (len == 3 && !strncasecmp("ook", t, 3)) file_type_set_content(&info->format, F_OOK);
else if (len == 4 && !strncasecmp("cs16", t, 4)) file_type_set_format(&info->format, F_CS16);
else if (len == 4 && !strncasecmp("cs32", t, 4)) file_type_set_format(&info->format, F_CS32);
else if (len == 4 && !strncasecmp("cf32", t, 4)) file_type_set_format(&info->format, F_CF32);
else if (len == 5 && !strncasecmp("cfile", t, 5)) file_type_set_format(&info->format, F_CF32); // compat
else if (len == 5 && !strncasecmp("logic", t, 5)) file_type_set_content(&info->format, F_LOGIC);
else if (len == 3 && !strncasecmp("complex16u", t, 10)) file_type_set_format(&info->format, F_CU8); // compat
else if (len == 3 && !strncasecmp("complex16s", t, 10)) file_type_set_format(&info->format, F_CS8); // compat
else if (len == 4 && !strncasecmp("complex", t, 7)) file_type_set_format(&info->format, F_CF32); // compat
//else fprintf(stderr, "Skipping type (len %ld) %s\n", len, t);
} else {
p++; // skip non-alphanum char otherwise
}
}
}
// return the last colon not followed by a backslash, otherwise NULL
static char const *last_plain_colon(char const *p)
{
char const *found = NULL;
char const *next = strchr(p, ':');
while (next && next[1] != '\\') {
found = next;
next = strchr(next+1, ':');
}
return found;
}
/**
This will detect file info and overrides.
Parse "[0-9]+(\.[0-9]+)?[A-Za-z]"
as frequency (suffix "M" or "[kMG]?Hz")
or sample rate (suffix "k" or "[kMG]?sps")
Parse "[A-Za-z][0-9A-Za-z]+" as format or content specifier:
2ch formats: "cu8", "cs8", "cs16", "cs32", "cf32"
1ch formats: "u8", "s8", "s16", "u16", "s32", "u32", "f32"
text formats: "vcd", "ook"
content types: "iq", "i", "q", "am", "fm", "logic"
Parses left to right, with the exception of a prefix up to the last colon ":"
This prefix is the forced override, parsed last and removed from the filename.
All matches are case-insensitive.
default detection, e.g.: path/filename.am.s16
overrides, e.g.: am:s16:path/filename.ext
other styles are detected but discouraged, e.g.:
am-s16:path/filename.ext, am.s16:path/filename.ext, path/filename.am_s16
*/
int file_info_parse_filename(file_info_t *info, char const *filename)
{
if (!filename) {
return 0;
}
info->spec = filename;
char const *p = last_plain_colon(filename);
if (p && p - filename < 64) {
size_t len = p - filename;
char forced[64];
memcpy(forced, filename, len);
forced[len] = '\0';
p++;
file_type(p, info);
file_type(forced, info);
info->path = p;
} else {
file_type(filename, info);
info->path = filename;
}
info->raw_format = info->format;
info->format = file_type_guess_auto_format(info->format);
return info->format;
}
// Unit testing
#ifdef _TEST
static void assert_file_type(int check, char const *spec)
{
file_info_t info = {0};
int ret = file_info_parse_filename(&info, spec);
if (check != ret) {
fprintf(stderr, "\nTEST failed: determine_file_type(\"%s\", &foo) = %8x == %8x\n", spec, ret, check);
} else {
fprintf(stderr, ".");
}
}
static void assert_str_equal(char const *a, char const *b)
{
if (a != b && (!a || !b || strcmp(a, b))) {
fprintf(stderr, "\nTEST failed: \"%s\" == \"%s\"\n", a, b);
} else {
fprintf(stderr, ".");
}
}
int main(void)
{
fprintf(stderr, "Testing:\n");
assert_str_equal(last_plain_colon("foo:bar:baz"), ":baz");
assert_str_equal(last_plain_colon("foo"), NULL);
assert_str_equal(last_plain_colon(":foo"), ":foo");
assert_str_equal(last_plain_colon("foo:"), ":");
assert_str_equal(last_plain_colon("foo:bar:C:\\path.txt"), ":C:\\path.txt");
assert_str_equal(last_plain_colon("foo:bar:C:\\path.txt:baz"), ":C:\\path.txt:baz");
assert_file_type(CU8_IQ, "cu8:");
assert_file_type(CS16_IQ, "cs16:");
assert_file_type(CF32_IQ, "cf32:");
assert_file_type(S16_AM, "am:");
assert_file_type(S16_AM, "am.s16:");
assert_file_type(S16_AM, "am-s16:");
assert_file_type(S16_AM, "am_s16:");
assert_file_type(S16_AM, "s16.am:");
assert_file_type(S16_AM, "s16-am:");
assert_file_type(S16_AM, "s16_am:");
assert_file_type(S16_AM, "am-s16.am:");
assert_file_type(S16_FM, "fm:");
assert_file_type(S16_FM, "fm.s16:");
assert_file_type(S16_FM, "fm-s16:");
assert_file_type(S16_FM, "fm_s16:");
assert_file_type(S16_FM, "s16.fm:");
assert_file_type(S16_FM, "s16-fm:");
assert_file_type(S16_FM, "s16_fm:");
assert_file_type(S16_FM, "fm+s16:");
assert_file_type(S16_FM, "s16,fm:");
assert_file_type(CU8_IQ, ".cu8");
assert_file_type(CS16_IQ, ".cs16");
assert_file_type(CF32_IQ, ".cf32");
assert_file_type(S16_AM, ".am");
assert_file_type(S16_AM, ".am.s16");
assert_file_type(S16_AM, ".am-s16");
assert_file_type(S16_AM, ".am_s16");
assert_file_type(S16_AM, ".s16+am");
assert_file_type(S16_AM, ".s16.am");
assert_file_type(S16_AM, ".s16-am");
assert_file_type(S16_AM, ".am-s16.am");
assert_file_type(S16_FM, ".fm");
assert_file_type(S16_FM, ".fm.s16");
assert_file_type(S16_FM, ".fm-s16");
assert_file_type(S16_FM, ".fm_s16");
assert_file_type(S16_FM, ".fm+s16");
assert_file_type(S16_FM, ".s16.fm");
assert_file_type(S16_FM, ".s16-fm");
assert_file_type(S16_FM, ".s16_fm");
assert_file_type(S16_FM, ".s16,fm");
fprintf(stderr, "\nDone!\n");
}
#endif /* _TEST */
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