93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
|
|
||
|
|
#ifndef RRBB_H
|
||
|
|
|
||
|
|
#define RRBB_H
|
||
|
|
|
||
|
|
|
||
|
|
#define FASTER13 1 // Don't pack 8 samples per byte.
|
||
|
|
|
||
|
|
|
||
|
|
//typedef short slice_t;
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Maximum size (in bytes) of an AX.25 frame including the 2 octet FCS.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define MAX_FRAME_LEN ((AX25_MAX_PACKET_LEN) + 2)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Maximum number of bits in AX.25 frame excluding the flags.
|
||
|
|
* Adequate for extreme case of bit stuffing after every 5 bits
|
||
|
|
* which could never happen.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define MAX_NUM_BITS (MAX_FRAME_LEN * 8 * 6 / 5)
|
||
|
|
|
||
|
|
typedef struct rrbb_s {
|
||
|
|
int magic1;
|
||
|
|
struct rrbb_s* nextp; /* Next pointer to maintain a queue. */
|
||
|
|
|
||
|
|
int chan; /* Radio channel from which it was received. */
|
||
|
|
int subchan; /* Which modem when more than one per channel. */
|
||
|
|
int slice; /* Which slicer. */
|
||
|
|
|
||
|
|
alevel_t alevel; /* Received audio level at time of frame capture. */
|
||
|
|
unsigned int len; /* Current number of samples in array. */
|
||
|
|
|
||
|
|
int is_scrambled; /* Is data scrambled G3RUH / K9NG style? */
|
||
|
|
int descram_state; /* Descrambler state before first data bit of frame. */
|
||
|
|
int prev_descram; /* Previous descrambled bit. */
|
||
|
|
|
||
|
|
unsigned char fdata[MAX_NUM_BITS];
|
||
|
|
|
||
|
|
int magic2;
|
||
|
|
} *rrbb_t;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
rrbb_t rrbb_new (int chan, int subchan, int slice, int is_scrambled, int descram_state, int prev_descram);
|
||
|
|
|
||
|
|
void rrbb_clear (rrbb_t b, int is_scrambled, int descram_state, int prev_descram);
|
||
|
|
|
||
|
|
|
||
|
|
static inline /*__attribute__((always_inline))*/ void rrbb_append_bit (rrbb_t b, const unsigned char val)
|
||
|
|
{
|
||
|
|
if (b->len >= MAX_NUM_BITS) {
|
||
|
|
return; /* Silently discard if full. */
|
||
|
|
}
|
||
|
|
b->fdata[b->len] = val;
|
||
|
|
b->len++;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline /*__attribute__((always_inline))*/ unsigned char rrbb_get_bit (const rrbb_t b, const int ind)
|
||
|
|
{
|
||
|
|
return (b->fdata[ind]);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void rrbb_chop8 (rrbb_t b);
|
||
|
|
|
||
|
|
int rrbb_get_len (rrbb_t b);
|
||
|
|
|
||
|
|
//void rrbb_flip_bit (rrbb_t b, unsigned int ind);
|
||
|
|
|
||
|
|
void rrbb_delete (rrbb_t b);
|
||
|
|
|
||
|
|
void rrbb_set_nextp (rrbb_t b, rrbb_t np);
|
||
|
|
rrbb_t rrbb_get_nextp (rrbb_t b);
|
||
|
|
|
||
|
|
int rrbb_get_chan (rrbb_t b);
|
||
|
|
int rrbb_get_subchan (rrbb_t b);
|
||
|
|
int rrbb_get_slice (rrbb_t b);
|
||
|
|
|
||
|
|
void rrbb_set_audio_level (rrbb_t b, alevel_t alevel);
|
||
|
|
alevel_t rrbb_get_audio_level (rrbb_t b);
|
||
|
|
|
||
|
|
int rrbb_get_is_scrambled (rrbb_t b);
|
||
|
|
int rrbb_get_descram_state (rrbb_t b);
|
||
|
|
int rrbb_get_prev_descram (rrbb_t b);
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|