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annotate libgsmhr1/rxfe.h @ 579:1dc5d9320e96

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libgsmhr1: implement RxFE block
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 13 Feb 2025 09:10:12 +0000
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children e2d5cad04cbf
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579
1dc5d9320e96 libgsmhr1: implement RxFE block
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1 /*
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2 * This library-internal header file provides definition for
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3 * struct gsmhr_rxfe_state, the state structure for our Rx front end
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4 * that can function either as part of the full endpoint decoder
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5 * or standalone as a TFO transform. The internal interface function
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6 * to the RxFE block as a whole (to be called from the full decoder
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7 * or from the TFO wrapper) is also declared here.
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8 */
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9
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10 #ifndef rxfe_h
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11 #define rxfe_h
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12
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13 #include <stdint.h>
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14 #include "tw_gsmhr.h"
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15 #include "typedefs.h"
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16
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17 #define GS_HISTORY_SIZE 28
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18
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19 struct gsmhr_rxfe_state {
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20 Shortword saved_frame[GSMHR_NUM_PARAMS];
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21 Longword gs_history[GS_HISTORY_SIZE];
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22 Longword cn_prng;
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23 Shortword gs_cn_out;
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24 uint8_t in_dtx;
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25 uint8_t ecu_state;
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26 uint8_t dtx_bfi_count;
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27 uint8_t dtx_muting;
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28 uint8_t gs_history_ptr;
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29 };
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30
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31 void rxfe_main(struct gsmhr_rxfe_state *st, const Shortword *prm_in,
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32 Shortword *prm_out, int fast_cn_muting,
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33 Shortword *deco_mode_out, Shortword *mute_permit,
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34 Shortword *dtxd_sp);
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35
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36 #endif /* include guard */