gsm-codec-lib: libtwamr/qgain795.c annotate

annotate libtwamr/qgain795.c @ 483:4f13db3a7086

doc/Utils-overview: document new utilities

author	Mychaela Falconia <falcon@freecalypso.org>
date	Mon, 20 May 2024 01:26:12 +0000
parents	2aa98051d445
children

rev	line source
376 2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	2 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	3 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	5 * R99 Version 3.3.0
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	6 * REL-4 Version 4.1.0
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	7 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	8 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	9 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	10 * File : qgain795.c
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	11 * Purpose : pitch and codebook gain quantization for MR795
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	12 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	13 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	15
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	16 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	17 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	18 * MODULE INCLUDE FILE AND VERSION ID
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	19 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	20 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	21 #include "namespace.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	22 #include "qgain795.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	23
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	24 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	25 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	26 * INCLUDE FILES
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	27 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	28 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	29 #include "typedef.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	30 #include "basic_op.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	31 #include "oper_32b.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	32 #include "no_count.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	33 #include "cnst.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	34 #include "log2.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	35 #include "pow2.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	36 #include "sqrt_l.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	37 #include "g_adapt.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	38 #include "calc_en.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	39 #include "q_gain_p.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	40 #include "mac_32.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	41 #include "gains_tab.h"
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	42
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	43 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	44 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	45 * LOCAL PROGRAM CODE
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	46 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	47 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	48
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	49 /*************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	50 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	51 * FUNCTION: MR795_gain_code_quant3
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	52 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	53 * PURPOSE: Pre-quantization of codebook gains, given three possible
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	54 * LTP gains (using predicted codebook gain)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	55 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	56 *************************************************************************/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	57 static void
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	58 MR795_gain_code_quant3(
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	59 Word16 exp_gcode0, /* i : predicted CB gain (exponent), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	60 Word16 gcode0, /* i : predicted CB gain (norm.), Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	61 Word16 g_pitch_cand[], /* i : Pitch gain candidates (3), Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	62 Word16 g_pitch_cind[], /* i : Pitch gain cand. indices (3), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	63 Word16 frac_coeff[], /* i : coefficients (5), Q15 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	64 Word16 exp_coeff[], /* i : energy coefficients (5), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	65 /* coefficients from calc_filt_ener()*/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	66 Word16 gain_pit, / o : Pitch gain, Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	67 Word16 gain_pit_ind, / o : Pitch gain index, Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	68 Word16 gain_cod, / o : Code gain, Q1 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	69 Word16 gain_cod_ind, / o : Code gain index, Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	70 Word16 qua_ener_MR122, / o : quantized energy error, Q10 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	71 /* (for MR122 MA predictor update) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	72 Word16 qua_ener / o : quantized energy error, Q10 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	73 /* (for other MA predictor update) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	74 )
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	75 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	76 const Word16 *p;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	77 Word16 i, j, cod_ind, pit_ind;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	78 Word16 e_max, exp_code;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	79 Word16 g_pitch, g2_pitch, g_code, g2_code_h, g2_code_l;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	80 Word16 g_pit_cod_h, g_pit_cod_l;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	81 Word16 coeff[5], coeff_lo[5];
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	82 Word16 exp_max[5];
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	83 Word32 L_tmp, L_tmp0, dist_min;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	84
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	85 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	86 * The error energy (sum) to be minimized consists of five terms, t[0..4].
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	87 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	88 * t[0] = gp^2 * <y1 y1>
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	89 * t[1] = -2gp <xn y1>
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	90 * t[2] = gc^2 * <y2 y2>
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	91 * t[3] = -2gc <xn y2>
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	92 * t[4] = 2gpgc * <y1 y2>
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	93 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	94 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	95
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	96 /* determine the scaling exponent for g_code: ec = ec0 - 10 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	97 exp_code = sub(exp_gcode0, 10);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	98
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	99 /* calculate exp_max[i] = s[i]-1 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	100 exp_max[0] = sub(exp_coeff[0], 13); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	101 exp_max[1] = sub(exp_coeff[1], 14); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	102 exp_max[2] = add(exp_coeff[2], add(15, shl(exp_code, 1))); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	103 exp_max[3] = add(exp_coeff[3], exp_code); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	104 exp_max[4] = add(exp_coeff[4], add(exp_code,1)); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	105
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	106
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	107 /-------------------------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	108 * Find maximum exponent: *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	109 * ~~~~~~~~~~~~~~~~~~~~~~ *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	110 * *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	111 * For the sum operation, all terms must have the same scaling; *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	112 * that scaling should be low enough to prevent overflow. There- *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	113 * fore, the maximum scale is determined and all coefficients are *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	114 * re-scaled: *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	115 * *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	116 * e_max = max(exp_max[i]) + 1; *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	117 * e = exp_max[i]-e_max; e <= 0! *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	118 * c[i] = c[i]2^e
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	119 -------------------------------------------------------------------/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	120
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	121 e_max = exp_max[0]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	122 for (i = 1; i < 5; i++) /* implemented flattened */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	123 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	124 move16(); test();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	125 if (sub(exp_max[i], e_max) > 0)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	126 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	127 e_max = exp_max[i]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	128 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	129 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	130
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	131 e_max = add(e_max, 1); /* To avoid overflow */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	132
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	133 for (i = 0; i < 5; i++) {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	134 j = sub(e_max, exp_max[i]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	135 L_tmp = L_deposit_h(frac_coeff[i]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	136 L_tmp = L_shr(L_tmp, j);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	137 L_Extract(L_tmp, &coeff[i], &coeff_lo[i]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	138 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	139
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	140
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	141 /-------------------------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	142 * Codebook search: *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	143 * ~~~~~~~~~~~~~~~~ *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	144 * *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	145 * For each of the candiates LTP gains in g_pitch_cand[], the terms *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	146 * t[0..4] are calculated from the values in the table (and the *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	147 * pitch gain candidate) and summed up; the result is the mean *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	148 * squared error for the LPT/CB gain pair. The index for the mini- *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	149 * mum MSE is stored and finally used to retrieve the quantized CB *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	150 * gain *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	151 -------------------------------------------------------------------/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	152
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	153 /* start with "infinite" MSE */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	154 dist_min = MAX_32; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	155 cod_ind = 0; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	156 pit_ind = 0; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	157
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	158 /* loop through LTP gain candidates */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	159 for (j = 0; j < 3; j++)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	160 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	161 /* pre-calculate terms only dependent on pitch gain */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	162 g_pitch = g_pitch_cand[j]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	163 g2_pitch = mult(g_pitch, g_pitch);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	164 L_tmp0 = Mpy_32_16( coeff[0], coeff_lo[0], g2_pitch);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	165 L_tmp0 = Mac_32_16(L_tmp0, coeff[1], coeff_lo[1], g_pitch);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	166
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	167 p = &qua_gain_code[0];
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	168 for (i = 0; i < NB_QUA_CODE; i++)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	169 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	170 g_code = p++; move16 (); / this is g_fac Q11 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	171 p++; /* skip log2(g_fac) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	172 p++; /* skip 20log10(g_fac) /
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	173
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	174 g_code = mult(g_code, gcode0);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	175
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	176 L_tmp = L_mult (g_code, g_code);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	177 L_Extract (L_tmp, &g2_code_h, &g2_code_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	178
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	179 L_tmp = L_mult(g_code, g_pitch);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	180 L_Extract (L_tmp, &g_pit_cod_h, &g_pit_cod_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	181
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	182 L_tmp = Mac_32 (L_tmp0, coeff[2], coeff_lo[2],
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	183 g2_code_h, g2_code_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	184 L_tmp = Mac_32_16(L_tmp, coeff[3], coeff_lo[3],
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	185 g_code);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	186 L_tmp = Mac_32 (L_tmp, coeff[4], coeff_lo[4],
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	187 g_pit_cod_h, g_pit_cod_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	188
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	189 /* store table index if MSE for this index is lower
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	190 than the minimum MSE seen so far; also store the
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	191 pitch gain for this (so far) lowest MSE */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	192 test ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	193 if (L_sub(L_tmp, dist_min) < (Word32) 0)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	194 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	195 dist_min = L_tmp; move32 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	196 cod_ind = i; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	197 pit_ind = j; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	198 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	199 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	200 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	201
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	202 /------------------------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	203 * read quantized gains and new values for MA predictor memories *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	204 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	205 ------------------------------------------------------------------/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	206
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	207 /* Read the quantized gains */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	208 p = &qua_gain_code[add (add (cod_ind, cod_ind), cod_ind)]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	209 g_code = *p++; move16();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	210 qua_ener_MR122 = p++; move16();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	211 qua_ener = p; move16();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	212
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	213 /------------------------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	214 * calculate final fixed codebook gain: *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	215 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	216 * *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	217 * gc = gc0 * g *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	218 ------------------------------------------------------------------/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	219
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	220 L_tmp = L_mult(g_code, gcode0);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	221 L_tmp = L_shr(L_tmp, sub(9, exp_gcode0));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	222 *gain_cod = extract_h(L_tmp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	223 *gain_cod_ind = cod_ind; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	224 *gain_pit = g_pitch_cand[pit_ind]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	225 *gain_pit_ind = g_pitch_cind[pit_ind]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	226 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	227
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	228
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	229 /*************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	230 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	231 * FUNCTION: MR795_gain_code_quant_mod
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	232 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	233 * PURPOSE: Modified quantization of the MR795 codebook gain
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	234 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	235 * Uses pre-computed energy coefficients in frac_en[]/exp_en[]
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	236 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	237 * frac_en[0]*2^exp_en[0] = <res res> // LP residual energy
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	238 * frac_en[1]*2^exp_en[1] = <exc exc> // LTP residual energy
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	239 * frac_en[2]*2^exp_en[2] = <exc code> // LTP/CB innovation dot product
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	240 * frac_en[3]*2^exp_en[3] = <code code> // CB innovation energy
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	241 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	242 *************************************************************************/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	243 static Word16
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	244 MR795_gain_code_quant_mod( /* o : index of quantization. */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	245 Word16 gain_pit, /* i : pitch gain, Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	246 Word16 exp_gcode0, /* i : predicted CB gain (exponent), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	247 Word16 gcode0, /* i : predicted CB gain (norm.), Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	248 Word16 frac_en[], /* i : energy coefficients (4),
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	249 fraction part, Q15 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	250 Word16 exp_en[], /* i : energy coefficients (4),
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	251 eponent part, Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	252 Word16 alpha, /* i : gain adaptor factor (>0), Q15 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	253 Word16 gain_cod_unq, /* i : Code gain (unquantized) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	254 /* (scaling: Q10 - exp_gcode0) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	255 Word16 gain_cod, / i/o: Code gain (pre-/quantized), Q1 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	256 Word16 qua_ener_MR122, / o : quantized energy error, Q10 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	257 /* (for MR122 MA predictor update) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	258 Word16 qua_ener / o : quantized energy error, Q10 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	259 /* (for other MA predictor update) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	260 )
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	261 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	262 const Word16 *p;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	263 Word16 i, index, tmp;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	264 Word16 one_alpha;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	265 Word16 exp, e_max;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	266 Word16 g2_pitch, g_code;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	267 Word16 g2_code_h, g2_code_l;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	268 Word16 d2_code_h, d2_code_l;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	269 Word16 coeff[5], coeff_lo[5], exp_coeff[5];
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	270 Word32 L_tmp, L_t0, L_t1, dist_min;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	271 Word16 gain_code;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	272
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	273 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	274 Steps in calculation of the error criterion (dist):
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	275 ---------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	276
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	277 underlined = constant; alp = FLP value of alpha, alpha = FIP
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	278 ----------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	279
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	280
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	281 ExEn = gp^2 * LtpEn + 2.0gpgc[i] * XC + gc[i]^2 * InnEn;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	282 ------------ ------ -- -----
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	283
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	284 aExEn= alp * ExEn
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	285 = alpgp^2LtpEn + 2.0alpgpXC gc[i] + alpInnEn gc[i]^2
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	286 -------------- ------------- ---------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	287
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	288 = t[1] + t[2] + t[3]
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	289
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	290 dist = d1 + d2;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	291
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	292 d1 = (1.0 - alp) * InnEn * (gcu - gc[i])^2 = t[4]
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	293 ------------------- ---
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	294
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	295 d2 = alp * (ResEn - 2.0 * sqrt(ResEn*ExEn) + ExEn);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	296 --- ----- --- -----
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	297
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	298 = alp * (sqrt(ExEn) - sqrt(ResEn))^2
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	299 --- -----------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	300
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	301 = (sqrt(aExEn) - sqrt(alp*ResEn))^2
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	302 ---------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	303
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	304 = (sqrt(aExEn) - t[0] )^2
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	305 ----
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	306
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	307 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	308
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	309 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	310 * calculate scalings of the constant terms
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	311 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	312 gain_code = shl (gain_cod, sub (10, exp_gcode0)); / Q1 -> Q11 (-ec0) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	313 g2_pitch = mult (gain_pit, gain_pit); /* Q14 -> Q13 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	314 /* 0 < alpha <= 0.5 => 0.5 <= 1-alpha < 1, i.e one_alpha is normalized */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	315 one_alpha = add (sub (32767, alpha), 1); /* 32768 - alpha */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	316
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	317
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	318 /* alpha <= 0.5 -> mult. by 2 to keep precision; compensate in exponent */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	319 tmp = extract_h (L_shl (L_mult (alpha, frac_en[1]), 1));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	320 /* directly store in 32 bit variable because no further mult. required */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	321 L_t1 = L_mult (tmp, g2_pitch); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	322 exp_coeff[1] = sub (exp_en[1], 15); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	323
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	324
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	325 tmp = extract_h (L_shl (L_mult (alpha, frac_en[2]), 1));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	326 coeff[2] = mult (tmp, gain_pit); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	327 exp = sub (exp_gcode0, 10);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	328 exp_coeff[2] = add (exp_en[2], exp); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	329
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	330
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	331 /* alpha <= 0.5 -> mult. by 2 to keep precision; compensate in exponent */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	332 coeff[3] = extract_h (L_shl (L_mult (alpha, frac_en[3]), 1));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	333 exp = sub (shl (exp_gcode0, 1), 7);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	334 exp_coeff[3] = add (exp_en[3], exp); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	335
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	336
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	337 coeff[4] = mult (one_alpha, frac_en[3]); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	338 exp_coeff[4] = add (exp_coeff[3], 1); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	339
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	340
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	341 L_tmp = L_mult (alpha, frac_en[0]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	342 /* sqrt_l returns normalized value and 2*exponent
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	343 -> result = val >> (exp/2)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	344 exp_coeff holds 2exponent for c[0] /
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	345 /* directly store in 32 bit variable because no further mult. required */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	346 L_t0 = sqrt_l_exp (L_tmp, &exp); /* normalization included in sqrt_l_exp */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	347 move32 (); /* function result */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	348 exp = add (exp, 47);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	349 exp_coeff[0] = sub (exp_en[0], exp); move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	350
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	351 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	352 * Determine the maximum exponent occuring in the distance calculation
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	353 * and adjust all fractions accordingly (including a safety margin)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	354 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	355 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	356
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	357 /* find max(e[1..4],e[0]+31) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	358 e_max = add (exp_coeff[0], 31);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	359 for (i = 1; i <= 4; i++)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	360 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	361 test ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	362 if (sub (exp_coeff[i], e_max) > 0)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	363 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	364 e_max = exp_coeff[i]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	365 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	366 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	367
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	368 /* scale c[1] (requires no further multiplication) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	369 tmp = sub (e_max, exp_coeff[1]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	370 L_t1 = L_shr(L_t1, tmp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	371
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	372 /* scale c[2..4] (used in Mpy_32_16 in the quantizer loop) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	373 for (i = 2; i <= 4; i++)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	374 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	375 tmp = sub (e_max, exp_coeff[i]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	376 L_tmp = L_deposit_h(coeff[i]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	377 L_tmp = L_shr(L_tmp, tmp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	378 L_Extract(L_tmp, &coeff[i], &coeff_lo[i]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	379 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	380
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	381 /* scale c[0] (requires no further multiplication) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	382 exp = sub (e_max, 31); /* new exponent */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	383 tmp = sub (exp, exp_coeff[0]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	384 L_t0 = L_shr (L_t0, shr (tmp, 1));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	385 /* perform correction by 1/sqrt(2) if exponent difference is odd */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	386 test (); logic16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	387 if ((tmp & 0x1) != 0)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	388 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	389 L_Extract(L_t0, &coeff[0], &coeff_lo[0]);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	390 L_t0 = Mpy_32_16(coeff[0], coeff_lo[0],
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	391 23170); /* 23170 Q15 = 1/sqrt(2)*/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	392 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	393
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	394 /* search the quantizer table for the lowest value
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	395 of the search criterion */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	396 dist_min = MAX_32; move32 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	397 index = 0; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	398 p = &qua_gain_code[0]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	399
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	400 for (i = 0; i < NB_QUA_CODE; i++)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	401 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	402 g_code = p++; move16 (); / this is g_fac (Q11) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	403 p++; /* skip log2(g_fac) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	404 p++; /* skip 20log10(g_fac) /
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	405 g_code = mult (g_code, gcode0);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	406
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	407 /* only continue if gc[i] < 2.0*gc
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	408 which is equiv. to g_code (Q10-ec0) < gain_code (Q11-ec0) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	409 test ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	410 if (sub (g_code, gain_code) >= 0)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	411 break;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	412
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	413 L_tmp = L_mult (g_code, g_code);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	414 L_Extract (L_tmp, &g2_code_h, &g2_code_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	415
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	416 tmp = sub (g_code, gain_cod_unq);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	417 L_tmp = L_mult (tmp, tmp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	418 L_Extract (L_tmp, &d2_code_h, &d2_code_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	419
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	420 /* t2, t3, t4 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	421 L_tmp = Mac_32_16 (L_t1, coeff[2], coeff_lo[2], g_code);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	422 L_tmp = Mac_32(L_tmp, coeff[3], coeff_lo[3], g2_code_h, g2_code_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	423
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	424 L_tmp = sqrt_l_exp (L_tmp, &exp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	425 L_tmp = L_shr (L_tmp, shr (exp, 1));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	426
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	427 /* d2 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	428 tmp = round (L_sub (L_tmp, L_t0));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	429 L_tmp = L_mult (tmp, tmp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	430
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	431 /* dist */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	432 L_tmp = Mac_32(L_tmp, coeff[4], coeff_lo[4], d2_code_h, d2_code_l);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	433
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	434 /* store table index if distance measure for this
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	435 index is lower than the minimum seen so far */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	436 test ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	437 if (L_sub (L_tmp, dist_min) < (Word32) 0)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	438 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	439 dist_min = L_tmp; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	440 index = i; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	441 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	442 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	443
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	444 /------------------------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	445 * read quantized gains and new values for MA predictor memories *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	446 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	447 ------------------------------------------------------------------/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	448
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	449 /* Read the quantized gains */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	450 p = &qua_gain_code[add (add (index, index), index)]; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	451 g_code = *p++; move16();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	452 qua_ener_MR122 = p++; move16();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	453 qua_ener = p; move16();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	454
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	455 /------------------------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	456 * calculate final fixed codebook gain: *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	457 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	458 * *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	459 * gc = gc0 * g *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	460 ------------------------------------------------------------------/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	461
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	462 L_tmp = L_mult(g_code, gcode0);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	463 L_tmp = L_shr(L_tmp, sub(9, exp_gcode0));
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	464 *gain_cod = extract_h(L_tmp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	465
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	466 return index;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	467 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	468
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	469 /*
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	470 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	471 * PUBLIC PROGRAM CODE
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	472 ********************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	473 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	474
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	475 /*************************************************************************
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	476 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	477 * FUNCTION: MR795_gain_quant
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	478 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	479 * PURPOSE: pitch and codebook quantization for MR795
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	480 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	481 *************************************************************************/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	482 void
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	483 MR795_gain_quant(
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	484 GainAdaptState adapt_st, / i/o: gain adapter state structure */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	485 Word16 res[], /* i : LP residual, Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	486 Word16 exc[], /* i : LTP excitation (unfiltered), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	487 Word16 code[], /* i : CB innovation (unfiltered), Q13 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	488 Word16 frac_coeff[], /* i : coefficients (5), Q15 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	489 Word16 exp_coeff[], /* i : energy coefficients (5), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	490 /* coefficients from calc_filt_ener() */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	491 Word16 exp_code_en, /* i : innovation energy (exponent), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	492 Word16 frac_code_en, /* i : innovation energy (fraction), Q15 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	493 Word16 exp_gcode0, /* i : predicted CB gain (exponent), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	494 Word16 frac_gcode0, /* i : predicted CB gain (fraction), Q15 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	495 Word16 L_subfr, /* i : Subframe length */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	496 Word16 cod_gain_frac, /* i : opt. codebook gain (fraction),Q15 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	497 Word16 cod_gain_exp, /* i : opt. codebook gain (exponent), Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	498 Word16 gp_limit, /* i : pitch gain limit */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	499 Word16 gain_pit, / i/o: Pitch gain, Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	500 Word16 gain_cod, / o : Code gain, Q1 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	501 Word16 qua_ener_MR122, / o : quantized energy error, Q10 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	502 /* (for MR122 MA predictor update) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	503 Word16 qua_ener, / o : quantized energy error, Q10 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	504 /* (for other MA predictor update) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	505 Word16 *anap / o : Index of quantization */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	506 /* (first gain pitch, then code pitch)*/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	507 )
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	508 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	509 Word16 frac_en[4];
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	510 Word16 exp_en[4];
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	511 Word16 ltpg, alpha, gcode0;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	512 Word16 g_pitch_cand[3]; /* pitch gain candidates Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	513 Word16 g_pitch_cind[3]; /* pitch gain indices Q0 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	514 Word16 gain_pit_index;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	515 Word16 gain_cod_index;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	516 Word16 exp;
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	517 Word16 gain_cod_unq; /* code gain (unq.) Q(10-exp_gcode0) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	518
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	519
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	520 /* get list of candidate quantized pitch gain values
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	521 * and corresponding quantization indices
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	522 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	523 gain_pit_index = q_gain_pitch (MR795, gp_limit, gain_pit,
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	524 g_pitch_cand, g_pitch_cind);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	525 move16 (); /* function result */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	526
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	527 /-------------------------------------------------------------------
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	528 * predicted codebook gain *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	529 * ~~~~~~~~~~~~~~~~~~~~~~~ *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	530 * gc0 = 2^exp_gcode0 + 2^frac_gcode0 *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	531 * *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	532 * gcode0 (Q14) = 2^142^frac_gcode0 = gc0 2^(14-exp_gcode0) *
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	533 -------------------------------------------------------------------/
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	534 gcode0 = extract_l(Pow2(14, frac_gcode0)); /* Q14 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	535
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	536 /* pre-quantization of codebook gain
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	537 * (using three pitch gain candidates);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	538 * result: best guess of pitch gain and code gain
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	539 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	540 MR795_gain_code_quant3(
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	541 exp_gcode0, gcode0, g_pitch_cand, g_pitch_cind,
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	542 frac_coeff, exp_coeff,
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	543 gain_pit, &gain_pit_index, gain_cod, &gain_cod_index,
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	544 qua_ener_MR122, qua_ener);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	545
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	546 /* calculation of energy coefficients and LTP coding gain */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	547 calc_unfilt_energies(res, exc, code, *gain_pit, L_subfr,
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	548 frac_en, exp_en, &ltpg);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	549
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	550 /* run gain adaptor, calculate alpha factor to balance LTP/CB gain
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	551 * (this includes the gain adaptor update)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	552 * Note: ltpg = 0 if frac_en[0] == 0, so the update is OK in that case
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	553 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	554 gain_adapt(adapt_st, ltpg, *gain_cod, &alpha);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	555
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	556 /* if this is a very low energy signal (threshold: see
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	557 * calc_unfilt_energies) or alpha <= 0 then don't run the modified quantizer
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	558 */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	559 test (); move16 (); test ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	560 if (frac_en[0] != 0 && alpha > 0)
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	561 {
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	562 /* innovation energy <cod cod> was already computed in gc_pred() */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	563 /* (this overwrites the LtpResEn which is no longer needed) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	564 frac_en[3] = frac_code_en; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	565 exp_en[3] = exp_code_en; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	566
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	567 /* store optimum codebook gain in Q(10-exp_gcode0) */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	568 exp = add (sub (cod_gain_exp, exp_gcode0), 10);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	569 gain_cod_unq = shl (cod_gain_frac, exp);
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	570
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	571 /* run quantization with modified criterion */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	572 gain_cod_index = MR795_gain_code_quant_mod(
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	573 *gain_pit, exp_gcode0, gcode0,
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	574 frac_en, exp_en, alpha, gain_cod_unq,
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	575 gain_cod, qua_ener_MR122, qua_ener); move16 (); /* function result */
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	576 }
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	577
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	578 (anap)++ = gain_pit_index; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	579 (anap)++ = gain_cod_index; move16 ();
2aa98051d445 libtwamr: integrate qgain795.c Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	580 }

FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/qgain795.c @ 483:4f13db3a7086