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annotate src/cs/layer1/gtt_include/ctm/viterbi.h @ 662:8cd8fd15a095

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SIM speed enhancement re-enabled and made configurable TI's original code supported SIM speed enhancement, but Openmoko had it disabled, and OM's disabling of speed enhancement somehow caused certain SIM cards to start working which didn't work before (OM's bug #666). Because our FC community is much smaller in year 2020 than OM's community was in their day, we are not able to find one of those #666-affected SIMs, thus the real issue they had encountered remains elusive. Thus our solution is to re-enable SIM speed enhancement and simply wait for if and when someone runs into a #666-affected SIM once again. We provide a SIM_allow_speed_enhancement global variable that allows SIM speed enhancement to be enabled or disabled per session, and an /etc/SIM_spenh file in FFS that allows it to enabled or disabled on a non-volatile basis. SIM speed enhancement is now enabled by default.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 24 May 2020 05:02:28 +0000
parents 945cf7f506b2
children
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1 /*
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2 *******************************************************************************
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3 *
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4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
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5 *
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6 * The program(s) may be used and/or copied only with the
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7 * written permission from Ericsson or in accordance
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8 * with the terms and conditions stipulated in the agreement or
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9 * contract under which the program(s) have been supplied.
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10 *
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11 *******************************************************************************
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12 *
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13 * File : viterbi.h
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14 * Purpose : Header file for viterbi.c
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15 * Author : Francisco Javier Gil Gomez
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16 *
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17 * Revision history
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18 *
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19 * $Log: $
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20 *
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21 *******************************************************************************
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22 */
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23
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24 #ifndef viterbi_h
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25 #define viterbi_h "$Id: $"
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26
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27 #include <stdio.h>
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28 #include <math.h>
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29
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30 #include "conv_poly.h" /* definition of viterbi_t */
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31
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32
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33 /***********************************************************************/
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34 /* viterbi_init() */
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35 /* ************** */
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36 /* Initialization of the Viterbi decoder. */
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37 /* */
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38 /* output variables: */
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39 /* *viterbi_state initialized state variable of the decoder */
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40 /* */
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41 /***********************************************************************/
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42
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43 void viterbi_init(viterbi_t* viterbi_state);
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44
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45
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46 /***********************************************************************/
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47 /* viterbi_reinit() */
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48 /* **************** */
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49 /* Re-Initialization of the Viterbi decoder. This function should be */
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50 /* used for re-setting a Viterbi decoder that has already been */
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51 /* initialized. In contrast to viterbi_init(), this reinit function */
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52 /* does not calculate the values of all members of viterbi_state that */
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53 /* do not change during the execution of the Viterbi algorithm. */
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54 /* */
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55 /* output variables: */
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56 /* *viterbi_state initialized state variable of the decoder */
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57 /* */
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58 /***********************************************************************/
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59
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60 void viterbi_reinit(viterbi_t* viterbi_state);
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61
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62
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63 /***********************************************************************/
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64 /* viterbi_exec() */
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65 /* ************** */
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66 /* Execution of the Viterbi decoder */
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67 /* */
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68 /* input variables: */
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69 /* inputword Vector with gross bits */
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70 /* length_input Number of valid gross bits in vector inputword.*/
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71 /* length_input must be an integer multiple of */
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72 /* CHC_RATE */
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73 /* */
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74 /* output variables: */
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75 /* out Vector with the decoded net bits. The net bits */
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76 /* are either 0 or 1. */
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77 /* *num_valid_out_bits Number of valid bits in vector out */
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78 /* */
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79 /* input/output variables: */
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80 /* *viterbi_state State variable of the decoder */
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81 /* */
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82 /***********************************************************************/
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83
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84 void viterbi_exec(WORD16* inputword, WORD16 length_input,
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85 WORD16* out, WORD16* num_valid_out_bits,
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86 viterbi_t* viterbi_state);
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87
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88 #endif