mirror of https://github.com/wb2osz/direwolf.git
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
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#ifndef RRBB_H
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#define RRBB_H
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#define FASTER13 1 // Don't pack 8 samples per byte.
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//typedef short slice_t;
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/*
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* Maximum size (in bytes) of an AX.25 frame including the 2 octet FCS.
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*/
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#define MAX_FRAME_LEN ((AX25_MAX_PACKET_LEN) + 2)
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/*
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* Maximum number of bits in AX.25 frame excluding the flags.
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* Adequate for extreme case of bit stuffing after every 5 bits
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* which could never happen.
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*/
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#define MAX_NUM_BITS (MAX_FRAME_LEN * 8 * 6 / 5)
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typedef struct rrbb_s {
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int magic1;
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struct rrbb_s* nextp; /* Next pointer to maintain a queue. */
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int chan; /* Radio channel from which it was received. */
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int subchan; /* Which modem when more than one per channel. */
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int slice; /* Which slicer. */
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alevel_t alevel; /* Received audio level at time of frame capture. */
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unsigned int len; /* Current number of samples in array. */
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int is_scrambled; /* Is data scrambled G3RUH / K9NG style? */
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int descram_state; /* Descrambler state before first data bit of frame. */
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int prev_descram; /* Previous descrambled bit. */
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unsigned char fdata[MAX_NUM_BITS];
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int magic2;
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} *rrbb_t;
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rrbb_t rrbb_new (int chan, int subchan, int slice, int is_scrambled, int descram_state, int prev_descram);
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void rrbb_clear (rrbb_t b, int is_scrambled, int descram_state, int prev_descram);
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static inline /*__attribute__((always_inline))*/ void rrbb_append_bit (rrbb_t b, const unsigned char val)
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{
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if (b->len >= MAX_NUM_BITS) {
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return; /* Silently discard if full. */
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}
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b->fdata[b->len] = val;
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b->len++;
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}
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static inline /*__attribute__((always_inline))*/ unsigned char rrbb_get_bit (const rrbb_t b, const int ind)
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{
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return (b->fdata[ind]);
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}
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void rrbb_chop8 (rrbb_t b);
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int rrbb_get_len (rrbb_t b);
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//void rrbb_flip_bit (rrbb_t b, unsigned int ind);
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void rrbb_delete (rrbb_t b);
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void rrbb_set_nextp (rrbb_t b, rrbb_t np);
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rrbb_t rrbb_get_nextp (rrbb_t b);
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int rrbb_get_chan (rrbb_t b);
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int rrbb_get_subchan (rrbb_t b);
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int rrbb_get_slice (rrbb_t b);
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void rrbb_set_audio_level (rrbb_t b, alevel_t alevel);
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alevel_t rrbb_get_audio_level (rrbb_t b);
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int rrbb_get_is_scrambled (rrbb_t b);
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int rrbb_get_descram_state (rrbb_t b);
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int rrbb_get_prev_descram (rrbb_t b);
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#endif
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