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radiosonde_auto_rx
kopia lustrzana https://github.com/projecthorus/radiosonde_auto_rx
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pull/13/head
Zilog80 2015-12-06 22:52:41 +01:00
rodzic c7d27afad0
commit deca97470b
3 zmienionych plików z 27 dodań i 39 usunięć
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62
m10/m10x.c
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@ -77,59 +77,47 @@ int findstr(char *buf, char *str, int pos) {
}
int read_wav_header(FILE *fp) {
char txt[5] = "\0\0\0\0";
char buff[4];
char txt[4+1] = "\0\0\0\0";
unsigned char dat[4];
int byte, p=0;
// long pos_fmt, pos_dat;
char fmt_[5] = "fmt ";
char data[5] = "data";
//if (fseek(fp, 0L, SEEK_SET)) return -1;
if (fread(txt, 1, 4, fp) < 4) return -1;
if (strncmp(txt, "RIFF", 4)) return -1;
if (fread(txt, 1, 4, fp) < 4) return -1;
// pos_WAVE = 8L
if (fread(txt, 1, 4, fp) < 4) return -1;
if (fread(txt, 1, 4, fp) < 4) return -1;
if (strncmp(txt, "WAVE", 4)) return -1;
// pos_fmt = 12L
for ( ; ; ) {
if ( (byte=fgetc(fp)) == EOF ) return -1;
buff[p % 4] = byte;
txt[p % 4] = byte;
p++; if (p==4) p=0;
if (findstr(buff, fmt_, p) == 4) break;
if (findstr(txt, "fmt ", p) == 4) break;
}
if (fread(buff, 1, 4, fp) < 4) return -1;
//memcpy(&byte, buff, 4); fprintf(stderr, "fmt_length : %04x\n", byte);
if (fread(buff, 1, 2, fp) < 2) return -1;
//byte = buff[0] + (buff[1] << 8); fprintf(stderr, "fmt_tag : %04x\n", byte & 0xFFFF);
if (fread(buff, 1, 2, fp) < 2) return -1;
channels = buff[0] + (buff[1] << 8);
//fprintf(stderr, "channels : %d\n", channels & 0xFFFF);
if (fread(buff, 1, 4, fp) < 4) return -1;
memcpy(&sample_rate, buff, 4);
//fprintf(stderr, "samplerate : %d\n", sample_rate);
if (fread(buff, 1, 4, fp) < 4) return -1;
//memcpy(&byte, buff, 4); fprintf(stderr, "bytes/sec : %d\n", byte);
if (fread(buff, 1, 2, fp) < 2) return -1;
byte = buff[0] + (buff[1] << 8);
//fprintf(stderr, "block_align: %04x\n", byte & 0xFFFF);
if (fread(buff, 1, 2, fp) < 2) return -1;
bits_sample = buff[0] + (buff[1] << 8);
//fprintf(stderr, "bits/sample: %d\n", bits_sample & 0xFFFF);
if (fread(dat, 1, 4, fp) < 4) return -1;
if (fread(dat, 1, 2, fp) < 2) return -1;
if (fread(dat, 1, 2, fp) < 2) return -1;
channels = dat[0] + (dat[1] << 8);
if (fread(dat, 1, 4, fp) < 4) return -1;
memcpy(&sample_rate, dat, 4); //sample_rate = dat[0]|(dat[1]<<8)|(dat[2]<<16)|(dat[3]<<24);
if (fread(dat, 1, 4, fp) < 4) return -1;
if (fread(dat, 1, 2, fp) < 2) return -1;
//byte = dat[0] + (dat[1] << 8);
if (fread(dat, 1, 2, fp) < 2) return -1;
bits_sample = dat[0] + (dat[1] << 8);
// pos_dat = 36L + info
//if (fread(txt, 1, 4, fp) < 4) return -1;
//fprintf(stderr, "data: %s\n", txt);
for ( ; ; ) {
if ( (byte=fgetc(fp)) == EOF ) return -1;
buff[p % 4] = byte;
txt[p % 4] = byte;
p++; if (p==4) p=0;
if (findstr(buff, data, p) == 4) break;
if (findstr(txt, "data", p) == 4) break;
}
if (fread(buff, 1, 4, fp) < 4) return -1;
if (fread(dat, 1, 4, fp) < 4) return -1;
fprintf(stderr, "sample_rate: %d\n", sample_rate);
@ -185,10 +173,10 @@ int read_bits_fsk(FILE *fp, int *bit, int *len) {
y0 = sample;
sample = read_signed_sample(fp);
if (sample == EOF_INT) return EOF;
if (option_inv) sample = -sample;
if (option_inv) sample = -sample; // 8bit: -sample-1
sample_count++;
par_alt = par;
par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
par = (sample >= 0) ? 1 : -1; // 8bit: 0..127,128..255 (-128..-1,0..127)
n++;
} while (par*par_alt > 0);

2
rs92/rs92gps.c
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@ -207,7 +207,7 @@ int read_sample(FILE *fp) { // int = i32_t
int sign(int sample) {
int sgn = 0;
if (bits_sample == 8) { // unsigned char:
if (sample & 0x80) sgn = 1; else sgn = -1; // 00..7F - , 80..FF: +
if (sample & 0x80) sgn = 1; else sgn = -1; // 00..7F: - , 80..FF: +
}
else if (bits_sample == 16) {
if (sample & 0x8000) sgn = -1; else sgn = 1;

2
rs92/rs92gps_rawin.c
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@ -202,7 +202,7 @@ int read_sample(FILE *fp) { // int = i32_t
int sign(int sample) {
int sgn = 0;
if (bits_sample == 8) { // unsigned char:
if (sample & 0x80) sgn = 1; else sgn = -1; // 00..7F - , 80..FF: +
if (sample & 0x80) sgn = 1; else sgn = -1; // 00..7F: - , 80..FF: +
}
else if (bits_sample == 16) {
if (sample & 0x8000) sgn = -1; else sgn = 1;