FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/gain_q.c @ 477:4c9222d95647

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libtwamr encoder: always emit frame->mode = mode; In the original implementation of amr_encode_frame(), the 'mode' member of the output struct was set to 0xFF if the output frame type is TX_NO_DATA. This design was made to mimic the mode field (16-bit word) being set to 0xFFFF (or -1) in 3GPP test sequence format - but nothing actually depends on this struct member being set in any way, and amr_frame_to_tseq() generates the needed 0xFFFF on its own, based on frame->type being equal to TX_NO_DATA. It is simpler and more efficient to always set frame->mode to the actual encoding mode in amr_encode_frame(), and this new behavior has already been documented in doc/AMR-library-API description in anticipation of the present change.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 May 2024 22:30:42 +0000
parents ccba5812fa44
children
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378
ccba5812fa44 libtwamr: integrate gain_q.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 : gain_q.c
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11 * Purpose : Quantazation of gains
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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 "gain_q.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 "no_count.h"
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33 #include "qua_gain.h"
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34 #include "cnst.h"
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35 #include "g_code.h"
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36 #include "q_gain_c.h"
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37 #include "gc_pred.h"
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38 #include "calc_en.h"
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39 #include "qgain795.h"
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40 #include "qgain475.h"
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41 #include "memops.h"
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42
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43 /*
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44 ********************************************************************************
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45 * PUBLIC PROGRAM CODE
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46 ********************************************************************************
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47 */
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48
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49 /*************************************************************************
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50 *
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51 * Function: gainQuant_reset
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52 * Purpose: Initializes state memory to zero
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53 *
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54 **************************************************************************
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55 */
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56 void gainQuant_reset (gainQuantState *state)
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57 {
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58 state->sf0_exp_gcode0 = 0;
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59 state->sf0_frac_gcode0 = 0;
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60 state->sf0_exp_target_en = 0;
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61 state->sf0_frac_target_en = 0;
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62
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63 Set_zero (state->sf0_exp_coeff, 5);
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64 Set_zero (state->sf0_frac_coeff, 5);
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65
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66 gc_pred_reset(&state->gc_predSt);
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67 gc_pred_reset(&state->gc_predUnqSt);
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68 gain_adapt_reset(&state->adaptSt);
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69 }
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70
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71 int gainQuant(
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72 gainQuantState *st, /* i/o : State struct */
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73 enum Mode mode, /* i : coder mode */
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74 Word16 res[], /* i : LP residual, Q0 */
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75 Word16 exc[], /* i : LTP excitation (unfiltered), Q0 */
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76 Word16 code[], /* i : CB innovation (unfiltered), Q13 */
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77 /* (unsharpened for MR475) */
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78 Word16 xn[], /* i : Target vector. */
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79 Word16 xn2[], /* i : Target vector. */
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80 Word16 y1[], /* i : Adaptive codebook. */
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81 Word16 Y2[], /* i : Filtered innovative vector. */
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82 Word16 g_coeff[], /* i : Correlations <xn y1> <y1 y1> */
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83 /* Compute in G_pitch(). */
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84 Word16 even_subframe, /* i : even subframe indicator flag */
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85 Word16 gp_limit, /* i : pitch gain limit */
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86 Word16 *sf0_gain_pit, /* o : Pitch gain sf 0. MR475 */
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87 Word16 *sf0_gain_cod, /* o : Code gain sf 0. MR475 */
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88 Word16 *gain_pit, /* i/o : Pitch gain. */
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89 Word16 *gain_cod, /* o : Code gain. */
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90 /* MR475: gain_* unquantized in even */
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91 /* subframes, quantized otherwise */
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92 Word16 **anap /* o : Index of quantization */
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93 )
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94 {
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95 Word16 exp_gcode0;
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96 Word16 frac_gcode0;
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97 Word16 qua_ener_MR122;
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98 Word16 qua_ener;
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99 Word16 frac_coeff[5];
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100 Word16 exp_coeff[5];
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101 Word16 exp_en, frac_en;
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102 Word16 cod_gain_exp, cod_gain_frac;
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103
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104 test ();
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105 if (sub (mode, MR475) == 0)
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106 {
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107 test ();
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108 if (even_subframe != 0)
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109 {
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110 /* save position in output parameter stream and current
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111 state of codebook gain predictor */
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112 st->gain_idx_ptr = (*anap)++;
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113 gc_pred_copy(&st->gc_predSt, &st->gc_predUnqSt);
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114
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115 /* predict codebook gain (using "unquantized" predictor)*/
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116 /* (note that code[] is unsharpened in MR475) */
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117 gc_pred(&st->gc_predUnqSt, mode, code,
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118 &st->sf0_exp_gcode0, &st->sf0_frac_gcode0,
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119 &exp_en, &frac_en);
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120
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121 /* calculate energy coefficients for quantization
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122 and store them in state structure (will be used
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123 in next subframe when real quantizer is run) */
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124 calc_filt_energies(mode, xn, xn2, y1, Y2, g_coeff,
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125 st->sf0_frac_coeff, st->sf0_exp_coeff,
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126 &cod_gain_frac, &cod_gain_exp);
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127
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128 /* store optimum codebook gain (Q1) */
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129 *gain_cod = shl (cod_gain_frac, add (cod_gain_exp, 1));
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130 move16 ();
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131
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132 calc_target_energy(xn,
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133 &st->sf0_exp_target_en, &st->sf0_frac_target_en);
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134
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 /* calculate optimum codebook gain and update
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 "unquantized" predictor */
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 MR475_update_unq_pred(&st->gc_predUnqSt,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 st->sf0_exp_gcode0, st->sf0_frac_gcode0,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 cod_gain_exp, cod_gain_frac);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 /* the real quantizer is not run here... */
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 else
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 {
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 /* predict codebook gain (using "unquantized" predictor) */
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 /* (note that code[] is unsharpened in MR475) */
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 gc_pred(&st->gc_predUnqSt, mode, code,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 &exp_gcode0, &frac_gcode0,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 &exp_en, &frac_en);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 /* calculate energy coefficients for quantization */
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 calc_filt_energies(mode, xn, xn2, y1, Y2, g_coeff,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 frac_coeff, exp_coeff,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 &cod_gain_frac, &cod_gain_exp);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 calc_target_energy(xn, &exp_en, &frac_en);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 /* run real (4-dim) quantizer and update real gain predictor */
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 *st->gain_idx_ptr = MR475_gain_quant(
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 &st->gc_predSt,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 st->sf0_exp_gcode0, st->sf0_frac_gcode0,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 st->sf0_exp_coeff, st->sf0_frac_coeff,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 st->sf0_exp_target_en, st->sf0_frac_target_en,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 code,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 exp_gcode0, frac_gcode0,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 exp_coeff, frac_coeff,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 exp_en, frac_en,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 gp_limit,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 sf0_gain_pit, sf0_gain_cod,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 gain_pit, gain_cod);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 else
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 {
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 /*-------------------------------------------------------------------*
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 * predict codebook gain and quantize *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 * (also compute normalized CB innovation energy for MR795) *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 *-------------------------------------------------------------------*/
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 gc_pred(&st->gc_predSt, mode, code, &exp_gcode0, &frac_gcode0,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 &exp_en, &frac_en);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 test ();
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 if (sub(mode, MR122) == 0)
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 {
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 *gain_cod = G_code (xn2, Y2); move16 ();
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 *(*anap)++ = q_gain_code (mode, exp_gcode0, frac_gcode0,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 gain_cod, &qua_ener_MR122, &qua_ener);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 move16 ();
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 else
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 {
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 /* calculate energy coefficients for quantization */
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 calc_filt_energies(mode, xn, xn2, y1, Y2, g_coeff,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 frac_coeff, exp_coeff,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 &cod_gain_frac, &cod_gain_exp);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 test ();
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 if (sub (mode, MR795) == 0)
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 {
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 MR795_gain_quant(&st->adaptSt, res, exc, code,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 frac_coeff, exp_coeff,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 exp_en, frac_en,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 exp_gcode0, frac_gcode0, L_SUBFR,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 cod_gain_frac, cod_gain_exp,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 gp_limit, gain_pit, gain_cod,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 &qua_ener_MR122, &qua_ener,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 anap);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 else
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 {
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 *(*anap)++ = Qua_gain(mode,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 exp_gcode0, frac_gcode0,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 frac_coeff, exp_coeff, gp_limit,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 gain_pit, gain_cod,
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 &qua_ener_MR122, &qua_ener);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 move16 ();
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 /*------------------------------------------------------------------*
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 * update table of past quantized energies *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 * st->past_qua_en(Q10) = 20 * Log10(qua_gain_code) / constant *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 * = Log2(qua_gain_code) *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 * = qua_ener *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 * constant = 20*Log10(2) *
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 *------------------------------------------------------------------*/
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 gc_pred_update(&st->gc_predSt, qua_ener_MR122, qua_ener);
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 }
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 return 0;
ccba5812fa44 libtwamr: integrate gain_q.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 }