gsm-codec-lib: libtwamr/qgain475.c annotate

annotate libtwamr/qgain475.c @ 485:751f06541fbb

doc/Codec-utils: clarify lack of DHF in gsmfr-decode-rb

author	Mychaela Falconia <falcon@freecalypso.org>
date	Mon, 20 May 2024 01:47:22 +0000
parents	1d2b39027b70
children

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

FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/qgain475.c @ 485:751f06541fbb