AFG/dump1090
3
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Remove unused functions in demod_2400

Browse source
This commit is contained in:
rxseger 2016-06-06 22:28:33 -07:00
parent bf042642c3
commit 75b69452ef
1 changed files with 0 additions and 66 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

66
demod_2400.c
View file

@ -52,72 +52,6 @@ static inline int slice_phase4(uint16_t *m) {
return m[0] + 5 * m[1] - 5 * m[2] - m[3];
}
static inline int correlate_phase0(uint16_t *m) {
return slice_phase0(m) * 26;
}
static inline int correlate_phase1(uint16_t *m) {
return slice_phase1(m) * 38;
}
static inline int correlate_phase2(uint16_t *m) {
return slice_phase2(m) * 38;
}
static inline int correlate_phase3(uint16_t *m) {
return slice_phase3(m) * 26;
}
static inline int correlate_phase4(uint16_t *m) {
return slice_phase4(m) * 19;
}
//
// These functions work out the correlation quality for the 10 symbols (5 bits) starting at m[0] + given phase offset.
// This is used to find the right phase offset to use for decoding.
//
static inline int correlate_check_0(uint16_t *m) {
return
abs(correlate_phase0(&m[0])) +
abs(correlate_phase2(&m[2])) +
abs(correlate_phase4(&m[4])) +
abs(correlate_phase1(&m[7])) +
abs(correlate_phase3(&m[9]));
}
static inline int correlate_check_1(uint16_t *m) {
return
abs(correlate_phase1(&m[0])) +
abs(correlate_phase3(&m[2])) +
abs(correlate_phase0(&m[5])) +
abs(correlate_phase2(&m[7])) +
abs(correlate_phase4(&m[9]));
}
static inline int correlate_check_2(uint16_t *m) {
return
abs(correlate_phase2(&m[0])) +
abs(correlate_phase4(&m[2])) +
abs(correlate_phase1(&m[5])) +
abs(correlate_phase3(&m[7])) +
abs(correlate_phase0(&m[10]));
}
static inline int correlate_check_3(uint16_t *m) {
return
abs(correlate_phase3(&m[0])) +
abs(correlate_phase0(&m[3])) +
abs(correlate_phase2(&m[5])) +
abs(correlate_phase4(&m[7])) +
abs(correlate_phase1(&m[10]));
}
static inline int correlate_check_4(uint16_t *m) {
return
abs(correlate_phase4(&m[0])) +
abs(correlate_phase1(&m[3])) +
abs(correlate_phase3(&m[5])) +
abs(correlate_phase0(&m[8])) +
abs(correlate_phase2(&m[10]));
}
//
// Given 'mlen' magnitude samples in 'm', sampled at 2.4MHz,
// try to demodulate some Mode S messages.