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annotate libtwamr/qgain475.c @ 453:19f1aa01ea10

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new approach to config & build for ThemWi software
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 10 May 2024 05:45:46 +0000
parents 1d2b39027b70
children
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1d2b39027b70 libtwamr: integrate qgain475.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : qg475.c
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11 * Purpose : Quantization of pitch and codebook gains for MR475.
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12 *
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13 ********************************************************************************
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14 */
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15
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16 /*
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17 ********************************************************************************
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18 * MODULE INCLUDE FILE AND VERSION ID
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19 ********************************************************************************
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20 */
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21 #include "namespace.h"
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22 #include "qgain475.h"
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23
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24 /*
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25 ********************************************************************************
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26 * INCLUDE FILES
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27 ********************************************************************************
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28 */
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29 #include "tw_amr.h"
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30 #include "typedef.h"
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31 #include "basic_op.h"
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32 #include "mac_32.h"
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33 #include "no_count.h"
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34 #include "cnst.h"
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35 #include "pow2.h"
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36 #include "log2.h"
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37 #include "qua_gain_tab.h"
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38
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39 /*
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40 ********************************************************************************
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41 * LOCAL VARIABLES AND TABLES
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42 ********************************************************************************
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43 */
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44
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45 /* minimum allowed gain code prediction error: 102.887/4096 = 0.0251189 */
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46 #define MIN_QUA_ENER ( -5443) /* Q10 <-> log2 (0.0251189) */
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47 #define MIN_QUA_ENER_MR122 (-32768) /* Q10 <-> 20*log10(0.0251189) */
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48
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49 /* minimum allowed gain code prediction error: 32000/4096 = 7.8125 */
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50 #define MAX_QUA_ENER ( 3037) /* Q10 <-> log2 (7.8125) */
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51 #define MAX_QUA_ENER_MR122 ( 18284) /* Q10 <-> 20*log10(7.8125) */
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52
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53 /*
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54 ********************************************************************************
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55 * PRIVATE PROGRAM CODE
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56 ********************************************************************************
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57 */
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58 static void MR475_quant_store_results(
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59 gc_predState *pred_st, /* i/o: gain predictor state struct */
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60 const Word16 *p, /* i : pointer to selected quantizer table entry */
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61 Word16 gcode0, /* i : predicted CB gain, Q(14 - exp_gcode0) */
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62 Word16 exp_gcode0, /* i : exponent of predicted CB gain, Q0 */
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63 Word16 *gain_pit, /* o : Pitch gain, Q14 */
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64 Word16 *gain_cod /* o : Code gain, Q1 */
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65 )
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66 {
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67 Word16 g_code, exp, frac, tmp;
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68 Word32 L_tmp;
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69
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70 Word16 qua_ener_MR122; /* o : quantized energy error, MR122 version Q10 */
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71 Word16 qua_ener; /* o : quantized energy error, Q10 */
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72
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73 /* Read the quantized gains */
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74 *gain_pit = *p++; move16 ();
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75 g_code = *p++; move16 ();
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76
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77 /*------------------------------------------------------------------*
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78 * calculate final fixed codebook gain: *
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79 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
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80 * *
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81 * gc = gc0 * g *
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82 *------------------------------------------------------------------*/
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83
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84 L_tmp = L_mult(g_code, gcode0);
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85 L_tmp = L_shr(L_tmp, sub(10, exp_gcode0));
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86 *gain_cod = extract_h(L_tmp);
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87
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88 /*------------------------------------------------------------------*
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89 * calculate predictor update values and update gain predictor: *
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90 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
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91 * *
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92 * qua_ener = log2(g) *
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93 * qua_ener_MR122 = 20*log10(g) *
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94 *------------------------------------------------------------------*/
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95
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96 Log2 (L_deposit_l (g_code), &exp, &frac); /* Log2(x Q12) = log2(x) + 12 */
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97 exp = sub(exp, 12);
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98
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99 tmp = shr_r (frac, 5);
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100 qua_ener_MR122 = add (tmp, shl (exp, 10));
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101
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102 L_tmp = Mpy_32_16(exp, frac, 24660); /* 24660 Q12 ~= 6.0206 = 20*log10(2) */
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103 qua_ener = round (L_shl (L_tmp, 13)); /* Q12 * Q0 = Q13 -> Q10 */
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104
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105 gc_pred_update(pred_st, qua_ener_MR122, qua_ener);
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106 }
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107
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108 /*
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109 ********************************************************************************
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110 * PUBLIC PROGRAM CODE
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111 ********************************************************************************
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112 */
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113
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114 /*************************************************************************
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115 *
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116 * FUNCTION: MR475_update_unq_pred()
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117 *
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118 * PURPOSE: use optimum codebook gain and update "unquantized"
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119 * gain predictor with the (bounded) prediction error
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120 *
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121 *************************************************************************/
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122 void
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123 MR475_update_unq_pred(
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124 gc_predState *pred_st, /* i/o: gain predictor state struct */
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125 Word16 exp_gcode0, /* i : predicted CB gain (exponent MSW), Q0 */
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126 Word16 frac_gcode0, /* i : predicted CB gain (exponent LSW), Q15 */
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127 Word16 cod_gain_exp, /* i : optimum codebook gain (exponent), Q0 */
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128 Word16 cod_gain_frac /* i : optimum codebook gain (fraction), Q15 */
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129 )
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130 {
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131 Word16 tmp, exp, frac;
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132 Word16 qua_ener, qua_ener_MR122;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 Word32 L_tmp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 /* calculate prediction error factor (given optimum CB gain gcu):
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 * predErrFact = gcu / gcode0
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 * (limit to MIN_PRED_ERR_FACT <= predErrFact <= MAX_PRED_ERR_FACT
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 * -> limit qua_ener*)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 * calculate prediction error (log):
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 * qua_ener_MR122 = log2(predErrFact)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 * qua_ener = 20*log10(predErrFact)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 if (test(), cod_gain_frac <= 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 /* if gcu <= 0 -> predErrFact = 0 < MIN_PRED_ERR_FACT */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 /* -> set qua_ener(_MR122) directly */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 qua_ener = MIN_QUA_ENER; move16 ();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 qua_ener_MR122 = MIN_QUA_ENER_MR122; move16 ();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 else
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 /* convert gcode0 from DPF to standard fraction/exponent format */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 /* with normalized frac, i.e. 16384 <= frac <= 32767 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 /* Note: exponent correction (exp=exp-14) is done after div_s */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 frac_gcode0 = extract_l (Pow2 (14, frac_gcode0));
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 /* make sure cod_gain_frac < frac_gcode0 for div_s */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 if (test (), sub(cod_gain_frac, frac_gcode0) >= 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 cod_gain_frac = shr (cod_gain_frac, 1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 cod_gain_exp = add (cod_gain_exp, 1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 predErrFact
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 = gcu / gcode0
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 = cod_gain_frac/frac_gcode0 * 2^(cod_gain_exp-(exp_gcode0-14))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 = div_s (c_g_f, frac_gcode0)*2^-15 * 2^(c_g_e-exp_gcode0+14)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 = div_s * 2^(cod_gain_exp-exp_gcode0 - 1)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 frac = div_s (cod_gain_frac, frac_gcode0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 tmp = sub (sub (cod_gain_exp, exp_gcode0), 1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 Log2 (L_deposit_l (frac), &exp, &frac);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 exp = add (exp, tmp);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 /* calculate prediction error (log2, Q10) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 qua_ener_MR122 = shr_r (frac, 5);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 qua_ener_MR122 = add (qua_ener_MR122, shl (exp, 10));
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 if (test (), sub(qua_ener_MR122, MIN_QUA_ENER_MR122) < 0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 qua_ener = MIN_QUA_ENER; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 qua_ener_MR122 = MIN_QUA_ENER_MR122; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 else if (test (), sub(qua_ener_MR122, MAX_QUA_ENER_MR122) > 0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 qua_ener = MAX_QUA_ENER; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 qua_ener_MR122 = MAX_QUA_ENER_MR122; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 else
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 /* calculate prediction error (20*log10, Q10) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 L_tmp = Mpy_32_16(exp, frac, 24660);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 /* 24660 Q12 ~= 6.0206 = 20*log10(2) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 qua_ener = round (L_shl (L_tmp, 13));
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 /* Q12 * Q0 = Q13 -> Q26 -> Q10 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 /* update MA predictor memory */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 gc_pred_update(pred_st, qua_ener_MR122, qua_ener);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 /*************************************************************************
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 * FUNCTION: MR475_gain_quant()
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 * PURPOSE: Quantization of pitch and codebook gains for two subframes
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 * (using predicted codebook gain)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 *************************************************************************/
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 Word16
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 MR475_gain_quant( /* o : index of quantization. */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 gc_predState *pred_st, /* i/o: gain predictor state struct */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 /* data from subframe 0 (or 2) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 Word16 sf0_exp_gcode0, /* i : predicted CB gain (exponent), Q0 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 Word16 sf0_frac_gcode0, /* i : predicted CB gain (fraction), Q15 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 Word16 sf0_exp_coeff[], /* i : energy coeff. (5), exponent part, Q0 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 Word16 sf0_frac_coeff[], /* i : energy coeff. (5), fraction part, Q15 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 /* (frac_coeff and exp_coeff computed in */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 /* calc_filt_energies()) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 Word16 sf0_exp_target_en, /* i : exponent of target energy, Q0 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 Word16 sf0_frac_target_en, /* i : fraction of target energy, Q15 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 /* data from subframe 1 (or 3) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 Word16 sf1_code_nosharp[], /* i : innovative codebook vector (L_SUBFR) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 /* (whithout pitch sharpening) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 Word16 sf1_exp_gcode0, /* i : predicted CB gain (exponent), Q0 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 Word16 sf1_frac_gcode0, /* i : predicted CB gain (fraction), Q15 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 Word16 sf1_exp_coeff[], /* i : energy coeff. (5), exponent part, Q0 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 Word16 sf1_frac_coeff[], /* i : energy coeff. (5), fraction part, Q15 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 /* (frac_coeff and exp_coeff computed in */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 /* calc_filt_energies()) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 Word16 sf1_exp_target_en, /* i : exponent of target energy, Q0 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 Word16 sf1_frac_target_en, /* i : fraction of target energy, Q15 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 Word16 gp_limit, /* i : pitch gain limit */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 Word16 *sf0_gain_pit, /* o : Pitch gain, Q14 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 Word16 *sf0_gain_cod, /* o : Code gain, Q1 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 Word16 *sf1_gain_pit, /* o : Pitch gain, Q14 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 Word16 *sf1_gain_cod /* o : Code gain, Q1 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 )
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 const Word16 *p;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 Word16 i, index = 0;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 Word16 tmp;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 Word16 exp;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 Word16 sf0_gcode0, sf1_gcode0;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 Word16 g_pitch, g2_pitch, g_code, g2_code, g_pit_cod;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 Word16 coeff[10], coeff_lo[10], exp_max[10]; /* 0..4: sf0; 5..9: sf1 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 Word32 L_tmp, dist_min;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 /*-------------------------------------------------------------------*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 * predicted codebook gain *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 * ~~~~~~~~~~~~~~~~~~~~~~~ *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 * gc0 = 2^exp_gcode0 + 2^frac_gcode0 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 * *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 * gcode0 (Q14) = 2^14*2^frac_gcode0 = gc0 * 2^(14-exp_gcode0) *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 *-------------------------------------------------------------------*/
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 sf0_gcode0 = extract_l(Pow2(14, sf0_frac_gcode0));
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 sf1_gcode0 = extract_l(Pow2(14, sf1_frac_gcode0));
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 /*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 * For each subframe, the error energy (sum) to be minimized consists
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 * of five terms, t[0..4].
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 * t[0] = gp^2 * <y1 y1>
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 * t[1] = -2*gp * <xn y1>
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 * t[2] = gc^2 * <y2 y2>
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 * t[3] = -2*gc * <xn y2>
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 * t[4] = 2*gp*gc * <y1 y2>
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 /* sf 0 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 /* determine the scaling exponent for g_code: ec = ec0 - 11 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 exp = sub(sf0_exp_gcode0, 11);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 /* calculate exp_max[i] = s[i]-1 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 exp_max[0] = sub(sf0_exp_coeff[0], 13); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 exp_max[1] = sub(sf0_exp_coeff[1], 14); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 exp_max[2] = add(sf0_exp_coeff[2], add(15, shl(exp, 1))); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 exp_max[3] = add(sf0_exp_coeff[3], exp); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 exp_max[4] = add(sf0_exp_coeff[4], add(1, exp)); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 /* sf 1 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 /* determine the scaling exponent for g_code: ec = ec0 - 11 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 exp = sub(sf1_exp_gcode0, 11);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301 /* calculate exp_max[i] = s[i]-1 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 exp_max[5] = sub(sf1_exp_coeff[0], 13); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 exp_max[6] = sub(sf1_exp_coeff[1], 14); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 exp_max[7] = add(sf1_exp_coeff[2], add(15, shl(exp, 1))); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 exp_max[8] = add(sf1_exp_coeff[3], exp); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306 exp_max[9] = add(sf1_exp_coeff[4], add(1, exp)); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 /*-------------------------------------------------------------------*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 * Gain search equalisation: *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 * ~~~~~~~~~~~~~~~~~~~~~~~~~ *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311 * The MSE for the two subframes is weighted differently if there *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 * is a big difference in the corresponding target energies *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 *-------------------------------------------------------------------*/
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 /* make the target energy exponents the same by de-normalizing the
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 fraction of the smaller one. This is necessary to be able to compare
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 them
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 exp = sf0_exp_target_en - sf1_exp_target_en;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 test ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 if (exp > 0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 sf1_frac_target_en = shr (sf1_frac_target_en, exp);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 else
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 sf0_frac_target_en = shl (sf0_frac_target_en, exp);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 /* assume no change of exponents */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 exp = 0; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 /* test for target energy difference; set exp to +1 or -1 to scale
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 * up/down coefficients for sf 1
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 tmp = shr_r (sf1_frac_target_en, 1); /* tmp = ceil(0.5*en(sf1)) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 test ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 if (sub (tmp, sf0_frac_target_en) > 0) /* tmp > en(sf0)? */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
340 /*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341 * target_energy(sf1) > 2*target_energy(sf0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342 * -> scale up MSE(sf0) by 2 by adding 1 to exponents 0..4
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 exp = 1; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 else
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348 tmp = shr (add (sf0_frac_target_en, 3), 2); /* tmp=ceil(0.25*en(sf0)) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349 test();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350 if (sub (tmp, sf1_frac_target_en) > 0) /* tmp > en(sf1)? */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352 /*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
353 * target_energy(sf1) < 0.25*target_energy(sf0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 * -> scale down MSE(sf0) by 0.5 by subtracting 1 from
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 * coefficients 0..4
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 exp = -1; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
360
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 for (i = 0; i < 5; i++)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 exp_max[i] = add (exp_max[i], exp); move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366 /*-------------------------------------------------------------------*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 * Find maximum exponent: *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 * ~~~~~~~~~~~~~~~~~~~~~~ *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369 * *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
370 * For the sum operation, all terms must have the same scaling; *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
371 * that scaling should be low enough to prevent overflow. There- *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
372 * fore, the maximum scale is determined and all coefficients are *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
373 * re-scaled: *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
374 * *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
375 * exp = max(exp_max[i]) + 1; *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
376 * e = exp_max[i]-exp; e <= 0! *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
377 * c[i] = c[i]*2^e *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
378 *-------------------------------------------------------------------*/
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
379
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
380 exp = exp_max[0]; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
381 for (i = 1; i < 10; i++)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
382 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
383 move16(); test();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
384 if (sub(exp_max[i], exp) > 0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
385 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
386 exp = exp_max[i]; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
387 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
389 exp = add(exp, 1); /* To avoid overflow */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
391 p = &sf0_frac_coeff[0]; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 for (i = 0; i < 5; i++) {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393 tmp = sub(exp, exp_max[i]);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
394 L_tmp = L_deposit_h(*p++);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
395 L_tmp = L_shr(L_tmp, tmp);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396 L_Extract(L_tmp, &coeff[i], &coeff_lo[i]);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
397 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 p = &sf1_frac_coeff[0]; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399 for (; i < 10; i++) {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400 tmp = sub(exp, exp_max[i]);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
401 L_tmp = L_deposit_h(*p++);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
402 L_tmp = L_shr(L_tmp, tmp);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403 L_Extract(L_tmp, &coeff[i], &coeff_lo[i]);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406 /*-------------------------------------------------------------------*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407 * Codebook search: *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 * ~~~~~~~~~~~~~~~~ *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409 * *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410 * For each pair (g_pitch, g_fac) in the table calculate the *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 * terms t[0..4] and sum them up; the result is the mean squared *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
412 * error for the quantized gains from the table. The index for the *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
413 * minimum MSE is stored and finally used to retrieve the quantized *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
414 * gains *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
415 *-------------------------------------------------------------------*/
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
416
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
417 /* start with "infinite" MSE */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
418 dist_min = MAX_32; move32();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
419
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
420 p = &table_gain_MR475[0]; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
421
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
422 for (i = 0; i < MR475_VQ_SIZE; i++)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
423 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
424 /* subframe 0 (and 2) calculations */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
425 g_pitch = *p++; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
426 g_code = *p++; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
427
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
428 g_code = mult(g_code, sf0_gcode0);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
429 g2_pitch = mult(g_pitch, g_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
430 g2_code = mult(g_code, g_code);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
431 g_pit_cod = mult(g_code, g_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
432
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
433 L_tmp = Mpy_32_16( coeff[0], coeff_lo[0], g2_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
434 L_tmp = Mac_32_16(L_tmp, coeff[1], coeff_lo[1], g_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
435 L_tmp = Mac_32_16(L_tmp, coeff[2], coeff_lo[2], g2_code);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
436 L_tmp = Mac_32_16(L_tmp, coeff[3], coeff_lo[3], g_code);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
437 L_tmp = Mac_32_16(L_tmp, coeff[4], coeff_lo[4], g_pit_cod);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
438
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
439 tmp = sub (g_pitch, gp_limit);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
440
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
441 /* subframe 1 (and 3) calculations */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
442 g_pitch = *p++; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
443 g_code = *p++; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
444
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
445 test (); test (); test ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
446 if (tmp <= 0 && sub(g_pitch, gp_limit) <= 0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
447 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
448 g_code = mult(g_code, sf1_gcode0);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
449 g2_pitch = mult(g_pitch, g_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
450 g2_code = mult(g_code, g_code);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
451 g_pit_cod = mult(g_code, g_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
452
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
453 L_tmp = Mac_32_16(L_tmp, coeff[5], coeff_lo[5], g2_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
454 L_tmp = Mac_32_16(L_tmp, coeff[6], coeff_lo[6], g_pitch);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
455 L_tmp = Mac_32_16(L_tmp, coeff[7], coeff_lo[7], g2_code);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
456 L_tmp = Mac_32_16(L_tmp, coeff[8], coeff_lo[8], g_code);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
457 L_tmp = Mac_32_16(L_tmp, coeff[9], coeff_lo[9], g_pit_cod);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
458
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
459 /* store table index if MSE for this index is lower
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
460 than the minimum MSE seen so far */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
461 test ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
462 if (L_sub(L_tmp, dist_min) < (Word32) 0)
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
463 {
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
464 dist_min = L_tmp; move32 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
465 index = i; move16 ();
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
466 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
467 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
468 }
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
469
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
470 /*------------------------------------------------------------------*
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
471 * read quantized gains and update MA predictor memories *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
472 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
473 *------------------------------------------------------------------*/
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
474
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
475 /* for subframe 0, the pre-calculated gcode0/exp_gcode0 are the same
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
476 as those calculated from the "real" predictor using quantized gains */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
477 tmp = shl(index, 2);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
478 MR475_quant_store_results(pred_st,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
479 &table_gain_MR475[tmp],
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
480 sf0_gcode0,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
481 sf0_exp_gcode0,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
482 sf0_gain_pit,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
483 sf0_gain_cod);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
484
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
485 /* calculate new predicted gain for subframe 1 (this time using
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
486 the real, quantized gains) */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
487 gc_pred(pred_st, MR475, sf1_code_nosharp,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
488 &sf1_exp_gcode0, &sf1_frac_gcode0,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
489 &sf0_exp_gcode0, &sf0_gcode0); /* last two args are dummy */
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
490 sf1_gcode0 = extract_l(Pow2(14, sf1_frac_gcode0));
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
491
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
492 tmp = add (tmp, 2);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
493 MR475_quant_store_results(pred_st,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
494 &table_gain_MR475[tmp],
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
495 sf1_gcode0,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
496 sf1_exp_gcode0,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
497 sf1_gain_pit,
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
498 sf1_gain_cod);
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
499
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
500 return index;
1d2b39027b70 libtwamr: integrate qgain475.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
501 }