gsm-codec-lib: libgsmefr/vad.c annotate

annotate libgsmefr/vad.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	1c108dd5b33f
children

rev	line source
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1 /***************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	2 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	3 * File Name: vad.c
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	4 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	5 * Purpose: Contains all functions for voice activity detection, as
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	6 * described in the high level specification of VAD.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	7 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	8 * Below is a listing of all the functions appearing in the file.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	9 * The functions are arranged according to their purpose. Under
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	10 * each heading, the ordering is hierarchical.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	11 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	12 * Resetting of static variables of VAD:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	13 * reset_vad()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	14 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	15 * Main routine of VAD (called by the speech encoder):
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	16 * vad_computation()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	17 * Adaptive filtering and energy computation:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	18 * energy_computation()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	19 * Averaging of autocorrelation function values:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	20 * acf_averaging()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	21 * Computation of predictor values:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	22 * predictor_values()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	23 * schur_recursion()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	24 * step_up()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	25 * compute_rav1()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	26 * Spectral comparison:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	27 * spectral_comparison()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	28 * Information tone detection:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	29 * tone_detection()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	30 * step_up()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	31 * Threshold adaptation:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	32 * threshold_adaptation()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	33 * VAD decision:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	34 * vad_decision()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	35 * VAD hangover addition:
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	36 * vad_hangover()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	37 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	38 * Periodicity detection routine (called by the speech encoder):
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	39 * periodicity_detection()
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	40 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	41 **************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	42
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	43 #include "gsm_efr.h"
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	44 #include "typedef.h"
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	45 #include "namespace.h"
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	46 #include "cnst.h"
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	47 #include "basic_op.h"
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	48 #include "oper_32b.h"
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	49 #include "no_count.h"
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	50 #include "vad.h"
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	51 #include "enc_state.h"
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	52
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	53 /* Constants of VAD hangover addition */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	54
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	55 #define HANGCONST 10
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	56 #define BURSTCONST 3
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	57
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	58 /* Constant of spectral comparison */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	59
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	60 #define STAT_THRESH 3670L /* 0.056 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	61
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	62 /* Constants of periodicity detection */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	63
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	64 #define LTHRESH 2
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	65 #define NTHRESH 4
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	66
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	67 /* Pseudo floating point representations of constants
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	68 for threshold adaptation */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	69
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	70 #define M_PTH 32500 /* 130000.0 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	71 #define E_PTH 17
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	72 #define M_PLEV 21667 /* 346666.7 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	73 #define E_PLEV 19
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	74 #define M_MARGIN 16927 /* 69333340 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	75 #define E_MARGIN 27
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	76
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	77 #define FAC 17203 /* 2.1 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	78
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	79 /* Constants of tone detection */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	80
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	81 #define FREQTH 3189
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	82 #define PREDTH 1464
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	83
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	84 /* forward declarations for internal functions */
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	85
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	86 static void energy_computation (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	87 Word16 r_h[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	88 Word16 scal_acf,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	89 Word16 rvad[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	90 Word16 scal_rvad,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	91 Pfloat * acf0,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	92 Pfloat * pvad
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	93 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	94
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	95 static void acf_averaging (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	96 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	97 Word16 r_h[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	98 Word16 r_l[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	99 Word16 scal_acf,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	100 Word32 L_av0[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	101 Word32 L_av1[]
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	102 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	103
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	104 static void predictor_values (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	105 Word32 L_av1[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	106 Word16 rav1[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	107 Word16 *scal_rav1
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	108 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	109
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	110 static void schur_recursion (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	111 Word32 L_av1[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	112 Word16 vpar[]
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	113 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	114
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	115 static void step_up (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	116 Word16 np,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	117 Word16 vpar[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	118 Word16 aav1[]
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	119 );
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	120
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	121 static void compute_rav1 (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	122 Word16 aav1[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	123 Word16 rav1[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	124 Word16 *scal_rav1
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	125 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	126
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	127 static Word16 spectral_comparison (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	128 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	129 Word16 rav1[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	130 Word16 scal_rav1,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	131 Word32 L_av0[]
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	132 );
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	133
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	134 static void threshold_adaptation (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	135 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	136 Word16 stat,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	137 Word16 ptch,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	138 Word16 tone,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	139 Word16 rav1[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	140 Word16 scal_rav1,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	141 Pfloat pvad,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	142 Pfloat acf0,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	143 Word16 rvad[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	144 Word16 *scal_rvad,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	145 Pfloat * thvad
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	146 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	147
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	148 static void tone_detection (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	149 Word16 rc[],
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	150 Word16 *tone
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	151 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	152
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	153 static Word16 vad_decision (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	154 Pfloat pvad,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	155 Pfloat thvad
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	156 );
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	157
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	158 static Word16 vad_hangover (
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	159 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	160 Word16 vvad
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	161 );
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	162
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	163 /*************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	164 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	165 * FUNCTION NAME: vad_reset
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	166 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	167 * PURPOSE: Resets the static variables of the VAD to their
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	168 * initial values
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	169 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	170 *************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	171
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	172 void vad_reset (struct EFR_encoder_state *st)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	173 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	174 struct vad_state *vst = &st->vad;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	175 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	176
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	177 /* Initialize rvad variables */
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	178 vst->rvad[0] = 0x6000;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	179 for (i = 1; i < 9; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	180 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	181 vst->rvad[i] = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	182 }
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	183 vst->scal_rvad = 7;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	184
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	185 /* Initialize threshold level */
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	186 vst->thvad.e = 20; /* exponent */
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	187 vst->thvad.m = 27083; /* mantissa */
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	188
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	189 /* Initialize ACF averaging variables */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	190 for (i = 0; i < 27; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	191 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	192 vst->L_sacf[i] = 0L;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	193 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	194 for (i = 0; i < 36; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	195 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	196 vst->L_sav0[i] = 0L;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	197 }
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	198 vst->pt_sacf = 0;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	199 vst->pt_sav0 = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	200
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	201 /* Initialize spectral comparison variable */
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	202 vst->L_lastdm = 0L;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	203
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	204 /* Initialize threshold adaptation variable */
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	205 vst->adaptcount = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	206
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	207 /* Initialize VAD hangover addition variables */
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	208 vst->burstcount = 0;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	209 vst->hangcount = -1;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	210
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	211 /* Initialize periodicity detection variables */
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	212 vst->oldlagcount = 0;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	213 vst->veryoldlagcount = 0;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	214 vst->oldlag = 18;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	215
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	216 st->ptch = 1;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	217
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	218 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	219 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	220
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	221 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	222 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	223 * FUNCTION: vad_computation
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	224 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	225 * PURPOSE: Returns a decision as to whether the current frame being
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	226 * processed by the speech encoder contains speech or not.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	227 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	228 * INPUTS: r_h[0..8] autocorrelation of input signal frame (msb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	229 * r_l[0..8] autocorrelation of input signal frame (lsb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	230 * scal_acf scaling factor for the autocorrelations
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	231 * rc[0..3] speech encoder reflection coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	232 * ptch flag to indicate a periodic signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	233 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	234 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	235 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	236 * RETURN VALUE: vad decision
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	237 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	238 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	239
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	240 Word16 vad_computation (
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	241 struct EFR_encoder_state *st,
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	242 Word16 r_h[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	243 Word16 r_l[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	244 Word16 scal_acf,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	245 Word16 rc[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	246 Word16 ptch
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	247 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	248 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	249 struct vad_state *vst = &st->vad;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	250 Word32 L_av0[9], L_av1[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	251 Word16 vad, vvad, rav1[9], scal_rav1, stat, tone;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	252 Pfloat acf0, pvad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	253
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	254 energy_computation (r_h, scal_acf, vst->rvad, vst->scal_rvad, &acf0, &pvad);
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	255 acf_averaging (st, r_h, r_l, scal_acf, L_av0, L_av1);
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	256 predictor_values (L_av1, rav1, &scal_rav1);
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	257 stat = spectral_comparison (st, rav1, scal_rav1, L_av0);
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	258 tone_detection (rc, &tone);
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	259 threshold_adaptation (st, stat, ptch, tone, rav1, scal_rav1, pvad, acf0,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	260 vst->rvad, &vst->scal_rvad, &vst->thvad);
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	261 vvad = vad_decision (pvad, vst->thvad);
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	262 vad = vad_hangover (st, vvad);
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	263
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	264 return vad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	265 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	266
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	267 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	268 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	269 * FUNCTION: energy_computation
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	270 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	271 * PURPOSE: Computes the input and residual energies of the adaptive
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	272 * filter in a floating point representation.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	273 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	274 * INPUTS: r_h[0..8] autocorrelation of input signal frame (msb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	275 * scal_acf scaling factor for the autocorrelations
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	276 * rvad[0..8] autocorrelated adaptive filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	277 * scal_rvad scaling factor for rvad[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	278 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	279 * OUTPUTS: *acf0 signal frame energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	280 * *pvad filtered signal energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	281 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	282 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	283 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	284 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	285
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	286 void energy_computation (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	287 Word16 r_h[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	288 Word16 scal_acf,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	289 Word16 rvad[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	290 Word16 scal_rvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	291 Pfloat * acf0,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	292 Pfloat * pvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	293 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	294 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	295 Word16 i, temp, norm_prod;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	296 Word32 L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	297
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	298 /* r[0] is always greater than zero (no need to test for r[0] == 0) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	299
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	300 /* Computation of acf0 (exponent and mantissa) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	301
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	302 acf0->e = sub (32, scal_acf); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	303 acf0->m = r_h[0] & 0x7ff8; move16 (); logic16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	304
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	305 /* Computation of pvad (exponent and mantissa) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	306
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	307 pvad->e = add (acf0->e, 14); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	308 pvad->e = sub (pvad->e, scal_rvad); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	309
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	310 L_temp = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	311
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	312 for (i = 1; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	313 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	314 temp = shr (r_h[i], 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	315 L_temp = L_mac (L_temp, temp, rvad[i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	316 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	317
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	318 temp = shr (r_h[0], 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	319 L_temp = L_add (L_temp, L_shr (L_mult (temp, rvad[0]), 1));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	320
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	321 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	322 if (L_temp <= 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	323 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	324 L_temp = 1L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	325 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	326 norm_prod = norm_l (L_temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	327 pvad->e = sub (pvad->e, norm_prod); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	328 pvad->m = extract_h (L_shl (L_temp, norm_prod));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	329 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	330
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	331 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	332 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	333
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	334 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	335 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	336 * FUNCTION: acf_averaging
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	337 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	338 * PURPOSE: Computes the arrays L_av0[0..8] and L_av1[0..8].
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	339 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	340 * INPUTS: r_h[0..8] autocorrelation of input signal frame (msb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	341 * r_l[0..8] autocorrelation of input signal frame (lsb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	342 * scal_acf scaling factor for the autocorrelations
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	343 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	344 * OUTPUTS: L_av0[0..8] ACF averaged over last four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	345 * L_av1[0..8] ACF averaged over previous four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	346 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	347 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	348 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	349 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	350
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	351 void acf_averaging (
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	352 struct EFR_encoder_state *st,
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	353 Word16 r_h[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	354 Word16 r_l[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	355 Word16 scal_acf,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	356 Word32 L_av0[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	357 Word32 L_av1[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	358 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	359 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	360 struct vad_state *vst = &st->vad;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	361 Word32 L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	362 Word16 scale;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	363 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	364
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	365 scale = add (9, scal_acf);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	366
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	367 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	368 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	369 L_temp = L_shr (L_Comp (r_h[i], r_l[i]), scale);
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	370 L_av0[i] = L_add (vst->L_sacf[i], L_temp);
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	371 L_av0[i] = L_add (vst->L_sacf[i + 9], L_av0[i]);
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	372 L_av0[i] = L_add (vst->L_sacf[i + 18], L_av0[i]);
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	373 vst->L_sacf[vst->pt_sacf + i] = L_temp;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	374 L_av1[i] = vst->L_sav0[vst->pt_sav0 + i];
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	375 vst->L_sav0[vst->pt_sav0 + i] = L_av0[i];
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	376 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	377
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	378 /* Update the array pointers */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	379
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	380 if (vst->pt_sacf == 18)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	381 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	382 vst->pt_sacf = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	383 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	384 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	385 {
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	386 vst->pt_sacf += 9;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	387 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	388
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	389 if (vst->pt_sav0 == 27)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	390 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	391 vst->pt_sav0 = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	392 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	393 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	394 {
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	395 vst->pt_sav0 += 9;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	396 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	397
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	398 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	399 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	400
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	401 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	402 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	403 * FUNCTION: predictor_values
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	404 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	405 * PURPOSE: Computes the array rav[0..8] needed for the spectral
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	406 * comparison and the threshold adaptation.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	407 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	408 * INPUTS: L_av1[0..8] ACF averaged over previous four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	409 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	410 * OUTPUTS: rav1[0..8] ACF obtained from L_av1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	411 * *scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	412 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	413 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	414 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	415 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	416
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	417 void predictor_values (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	418 Word32 L_av1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	419 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	420 Word16 *scal_rav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	421 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	422 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	423 Word16 vpar[8], aav1[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	424
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	425 schur_recursion (L_av1, vpar);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	426 step_up (8, vpar, aav1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	427 compute_rav1 (aav1, rav1, scal_rav1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	428
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	429 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	430 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	431
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	432 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	433 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	434 * FUNCTION: schur_recursion
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	435 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	436 * PURPOSE: Uses the Schur recursion to compute adaptive filter
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	437 * reflection coefficients from an autorrelation function.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	438 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	439 * INPUTS: L_av1[0..8] autocorrelation function
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	440 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	441 * OUTPUTS: vpar[0..7] reflection coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	442 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	443 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	444 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	445 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	446
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	447 void schur_recursion (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	448 Word32 L_av1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	449 Word16 vpar[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	450 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	451 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	452 Word16 acf[9], pp[9], kk[9], temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	453 Word16 i, k, m, n;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	454
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	455 /* Schur recursion with 16-bit arithmetic */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	456
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	457 test (); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	458 if (L_av1[0] == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	459 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	460 for (i = 0; i < 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	461 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	462 vpar[i] = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	463 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	464 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	465 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	466 temp = norm_l (L_av1[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	467
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	468 for (k = 0; k <= 8; k++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	469 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	470 acf[k] = extract_h (L_shl (L_av1[k], temp)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	471 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	472
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	473 /* Initialize arrays pp[..] and kk[..] for the recursion: */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	474
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	475 for (i = 1; i <= 7; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	476 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	477 kk[9 - i] = acf[i]; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	478 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	479
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	480 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	481 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	482 pp[i] = acf[i]; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	483 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	484
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	485 /* Compute Parcor coefficients: */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	486
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	487 for (n = 0; n < 8; n++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	488 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	489 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	490 if ((pp[0] == 0) \|\|
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	491 (pp[0] < abs_s (pp[1])))
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	492 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	493 for (i = n; i < 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	494 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	495 vpar[i] = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	496 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	497 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	498 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	499 vpar[n] = div_s (abs_s (pp[1]), pp[0]); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	500
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	501 test (); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	502 if (pp[1] > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	503 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	504 vpar[n] = negate (vpar[n]); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	505 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	506 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	507 if (n == 7)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	508 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	509 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	510 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	511 /* Schur recursion: */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	512
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	513 pp[0] = add (pp[0], mult_r (pp[1], vpar[n])); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	514
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	515 for (m = 1; m <= 7 - n; m++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	516 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	517 pp[m] = add (pp[1 + m], mult_r (kk[9 - m], vpar[n]));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	518 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	519 kk[9 - m] = add (kk[9 - m], mult_r (pp[1 + m], vpar[n]));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	520 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	521 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	522 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	523
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	524 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	525 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	526
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	527 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	528 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	529 * FUNCTION: step_up
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	530 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	531 * PURPOSE: Computes the transversal filter coefficients from the
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	532 * reflection coefficients.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	533 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	534 * INPUTS: np filter order (2..8)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	535 * vpar[0..np-1] reflection coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	536 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	537 * OUTPUTS: aav1[0..np] transversal filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	538 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	539 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	540 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	541 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	542
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	543 void step_up (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	544 Word16 np,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	545 Word16 vpar[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	546 Word16 aav1[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	547 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	548 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	549 Word32 L_coef[9], L_work[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	550 Word16 temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	551 Word16 i, m;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	552
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	553 /* Initialization of the step-up recursion */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	554
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	555 L_coef[0] = 0x20000000L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	556 L_coef[1] = L_shl (L_deposit_l (vpar[0]), 14); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	557
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	558 /* Loop on the LPC analysis order: */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	559
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	560 for (m = 2; m <= np; m++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	561 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	562 for (i = 1; i < m; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	563 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	564 temp = extract_h (L_coef[m - i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	565 L_work[i] = L_mac (L_coef[i], vpar[m - 1], temp); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	566 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	567
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	568 for (i = 1; i < m; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	569 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	570 L_coef[i] = L_work[i]; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	571 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	572
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	573 L_coef[m] = L_shl (L_deposit_l (vpar[m - 1]), 14); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	574 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	575
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	576 /* Keep the aav1[0..np] in 15 bits */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	577
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	578 for (i = 0; i <= np; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	579 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	580 aav1[i] = extract_h (L_shr (L_coef[i], 3)); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	581 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	582
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	583 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	584 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	585
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	586 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	587 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	588 * FUNCTION: compute_rav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	589 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	590 * PURPOSE: Computes the autocorrelation function of the adaptive
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	591 * filter coefficients.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	592 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	593 * INPUTS: aav1[0..8] adaptive filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	594 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	595 * OUTPUTS: rav1[0..8] ACF of aav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	596 * *scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	597 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	598 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	599 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	600 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	601
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	602 void compute_rav1 (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	603 Word16 aav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	604 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	605 Word16 *scal_rav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	606 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	607 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	608 Word32 L_work[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	609 Word16 i, k;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	610
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	611 /* Computation of the rav1[0..8] */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	612
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	613 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	614 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	615 L_work[i] = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	616
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	617 for (k = 0; k <= 8 - i; k++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	618 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	619 L_work[i] = L_mac (L_work[i], aav1[k], aav1[k + i]); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	620 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	621 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	622
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	623 test (); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	624 if (L_work[0] == 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	625 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	626 *scal_rav1 = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	627 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	628 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	629 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	630 *scal_rav1 = norm_l (L_work[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	631 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	632
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	633 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	634 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	635 rav1[i] = extract_h (L_shl (L_work[i], *scal_rav1)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	636 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	637
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	638 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	639 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	640
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	641 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	642 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	643 * FUNCTION: spectral_comparison
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	644 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	645 * PURPOSE: Computes the stat flag needed for the threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	646 * adaptation decision.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	647 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	648 * INPUTS: rav1[0..8] ACF obtained from L_av1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	649 * *scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	650 * L_av0[0..8] ACF averaged over last four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	651 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	652 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	653 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	654 * RETURN VALUE: flag to indicate spectral stationarity
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	655 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	656 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	657
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	658 Word16 spectral_comparison (
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	659 struct EFR_encoder_state *st,
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	660 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	661 Word16 scal_rav1,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	662 Word32 L_av0[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	663 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	664 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	665 struct vad_state *vst = &st->vad;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	666 Word32 L_dm, L_sump, L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	667 Word16 stat, sav0[9], shift, divshift, temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	668 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	669
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	670 /* Re-normalize L_av0[0..8] */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	671
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	672 test (); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	673 if (L_av0[0] == 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	674 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	675 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	676 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	677 sav0[i] = 0x0fff; /* 4095 */ move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	678 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	679 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	680 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	681 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	682 shift = sub (norm_l (L_av0[0]), 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	683 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	684 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	685 sav0[i] = extract_h (L_shl (L_av0[i], shift)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	686 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	687 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	688
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	689 /* Compute partial sum of dm */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	690
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	691 L_sump = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	692 for (i = 1; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	693 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	694 L_sump = L_mac (L_sump, rav1[i], sav0[i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	695 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	696
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	697 /* Compute the division of the partial sum by sav0[0] */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	698
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	699 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	700 if (L_sump < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	701 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	702 L_temp = L_negate (L_sump);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	703 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	704 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	705 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	706 L_temp = L_sump; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	707 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	708
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	709 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	710 if (L_temp == 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	711 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	712 L_dm = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	713 shift = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	714 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	715 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	716 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	717 sav0[0] = shl (sav0[0], 3); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	718 shift = norm_l (L_temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	719 temp = extract_h (L_shl (L_temp, shift));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	720
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	721 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	722 if (sav0[0] >= temp)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	723 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	724 divshift = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	725 temp = div_s (temp, sav0[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	726 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	727 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	728 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	729 divshift = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	730 temp = sub (temp, sav0[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	731 temp = div_s (temp, sav0[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	732 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	733
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	734 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	735 if (divshift == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	736 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	737 L_dm = 0x8000L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	738 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	739 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	740 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	741 L_dm = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	742 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	743
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	744 L_dm = L_shl (L_add (L_dm, L_deposit_l (temp)), 1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	745
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	746 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	747 if (L_sump < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	748 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	749 L_dm = L_negate (L_dm);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	750 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	751 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	752
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	753 /* Re-normalization and final computation of L_dm */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	754
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	755 L_dm = L_shl (L_dm, 14);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	756 L_dm = L_shr (L_dm, shift);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	757 L_dm = L_add (L_dm, L_shl (L_deposit_l (rav1[0]), 11));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	758 L_dm = L_shr (L_dm, scal_rav1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	759
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	760 /* Compute the difference and save L_dm */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	761
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	762 L_temp = L_sub (L_dm, vst->L_lastdm);
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	763 vst->L_lastdm = L_dm;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	764
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	765 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	766 if (L_temp < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	767 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	768 L_temp = L_negate (L_temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	769 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	770 /* Evaluation of the stat flag */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	771
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	772 L_temp = L_sub (L_temp, STAT_THRESH);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	773
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	774 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	775 if (L_temp < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	776 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	777 stat = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	778 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	779 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	780 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	781 stat = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	782 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	783
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	784 return stat;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	785 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	786
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	787 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	788 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	789 * FUNCTION: threshold_adaptation
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	790 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	791 * PURPOSE: Evaluates the secondary VAD decision. If speech is not
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	792 * present then the noise model rvad and adaptive threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	793 * thvad are updated.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	794 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	795 * INPUTS: stat flag to indicate spectral stationarity
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	796 * ptch flag to indicate a periodic signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	797 * tone flag to indicate a tone signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	798 * rav1[0..8] ACF obtained from L_av1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	799 * scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	800 * pvad filtered signal energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	801 * acf0 signal frame energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	802 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	803 * OUTPUTS: rvad[0..8] autocorrelated adaptive filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	804 * *scal_rvad rvad[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	805 * *thvad decision threshold (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	806 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	807 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	808 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	809 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	810
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	811 void threshold_adaptation (
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	812 struct EFR_encoder_state *st,
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	813 Word16 stat,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	814 Word16 ptch,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	815 Word16 tone,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	816 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	817 Word16 scal_rav1,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	818 Pfloat pvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	819 Pfloat acf0,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	820 Word16 rvad[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	821 Word16 *scal_rvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	822 Pfloat * thvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	823 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	824 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	825 struct vad_state *vst = &st->vad;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	826 Word16 comp, comp2;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	827 Word32 L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	828 Word16 temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	829 Pfloat p_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	830 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	831
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	832 comp = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	833
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	834 /* Test if acf0 < pth; if yes set thvad to plev */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	835
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	836 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	837 if (acf0.e < E_PTH)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	838 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	839 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	840 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	841 test (); test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	842 if ((acf0.e == E_PTH) && (acf0.m < M_PTH))
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	843 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	844 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	845 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	846 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	847 if (comp == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	848 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	849 thvad->e = E_PLEV; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	850 thvad->m = M_PLEV; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	851
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	852 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	853 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	854 /* Test if an adaption is required */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	855
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	856 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	857 if (ptch == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	858 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	859 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	860 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	861 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	862 if (stat == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	863 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	864 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	865 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	866 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	867 if (tone == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	868 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	869 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	870 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	871 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	872 if (comp == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	873 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	874 vst->adaptcount = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	875 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	876 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	877 /* Increment adaptcount */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	878
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	879 vst->adaptcount = add (vst->adaptcount, 1);
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	880 if (vst->adaptcount <= 8)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	881 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	882 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	883 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	884 /* computation of thvad-(thvad/dec) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	885
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	886 thvad->m = sub (thvad->m, shr (thvad->m, 5)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	887
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	888 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	889 if (thvad->m < 0x4000)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	890 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	891 thvad->m = shl (thvad->m, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	892 thvad->e = sub (thvad->e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	893 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	894 /*** computation of pvadfac **/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	895
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	896 L_temp = L_mult (pvad.m, FAC);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	897 L_temp = L_shr (L_temp, 15);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	898 p_temp.e = add (pvad.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	899
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	900 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	901 if (L_temp > 0x7fffL)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	902 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	903 L_temp = L_shr (L_temp, 1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	904 p_temp.e = add (p_temp.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	905 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	906 p_temp.m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	907
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	908 /*** test if thvad < pvadfac **/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	909
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	910 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	911 if (thvad->e < p_temp.e)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	912 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	913 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	914 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	915 test (); test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	916 if ((thvad->e == p_temp.e) &&
1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	917 (thvad->m < p_temp.m))
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	918 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	919 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	920 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	921 /*** compute minimum(thvad+(thvad/inc), pvadfac) when comp = 1 **/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	922
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	923 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	924 if (comp == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	925 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	926 /* compute thvad + (thvad/inc) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	927
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	928 L_temp = L_add (L_deposit_l (thvad->m),
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	929 L_deposit_l (shr (thvad->m, 4)));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	930
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	931 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	932 if (L_temp > 0x7fffL)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	933 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	934 thvad->m = extract_l (L_shr (L_temp, 1)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	935 thvad->e = add (thvad->e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	936 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	937 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	938 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	939 thvad->m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	940 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	941
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	942 comp2 = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	943
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	944 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	945 if (p_temp.e < thvad->e)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	946 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	947 comp2 = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	948 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	949 test (); test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	950 if ((p_temp.e == thvad->e) &&
1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	951 (p_temp.m < thvad->m))
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	952 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	953 comp2 = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	954 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	955 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	956 if (comp2 == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	957 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	958 thvad->e = p_temp.e;move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	959 thvad->m = p_temp.m;move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	960 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	961 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	962 /* compute pvad + margin */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	963
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	964 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	965 if (pvad.e == E_MARGIN)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	966 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	967 L_temp = L_add (L_deposit_l (pvad.m), L_deposit_l (M_MARGIN));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	968 p_temp.m = extract_l (L_shr (L_temp, 1)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	969 p_temp.e = add (pvad.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	970 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	971 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	972 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	973 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	974 if (pvad.e > E_MARGIN)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	975 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	976 temp = sub (pvad.e, E_MARGIN);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	977 temp = shr (M_MARGIN, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	978 L_temp = L_add (L_deposit_l (pvad.m), L_deposit_l (temp));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	979
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	980 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	981 if (L_temp > 0x7fffL)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	982 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	983 p_temp.e = add (pvad.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	984 p_temp.m = extract_l (L_shr (L_temp, 1));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	985 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	986 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	987 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	988 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	989 p_temp.e = pvad.e; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	990 p_temp.m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	991 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	992 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	993 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	994 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	995 temp = sub (E_MARGIN, pvad.e);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	996 temp = shr (pvad.m, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	997 L_temp = L_add (L_deposit_l (M_MARGIN), L_deposit_l (temp));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	998
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	999 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1000 if (L_temp > 0x7fffL)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1001 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1002 p_temp.e = add (E_MARGIN, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1003 p_temp.m = extract_l (L_shr (L_temp, 1));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1004 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1005 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1006 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1007 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1008 p_temp.e = E_MARGIN; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1009 p_temp.m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1010 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1011 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1012 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1013
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1014 /* Test if thvad > pvad + margin */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1015
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1016 comp = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1017
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1018 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1019 if (thvad->e > p_temp.e)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1020 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1021 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1022 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1023 test (); test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1024 if ((thvad->e == p_temp.e) &&
1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1025 (thvad->m > p_temp.m))
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1026 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1027 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1028 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1029 test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1030 if (comp == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1031 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1032 thvad->e = p_temp.e; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1033 thvad->m = p_temp.m; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1034 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1035 /* Normalise and retain rvad[0..8] in memory */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1036
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1037 *scal_rvad = scal_rav1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1038
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1039 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1040 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1041 rvad[i] = rav1[i]; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1042 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1043
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1044 /* Set adaptcount to adp + 1 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1045
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1046 vst->adaptcount = 9;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1047
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1048 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1049 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1050
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1051 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1052 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1053 * FUNCTION: tone_detection
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1054 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1055 * PURPOSE: Computes the tone flag needed for the threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1056 * adaptation decision.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1057 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1058 * INPUTS: rc[0..3] reflection coefficients calculated in the
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1059 * speech encoder short term predictor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1060 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1061 * OUTPUTS: *tone flag to indicate a periodic signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1062 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1063 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1064 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1065 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1066
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1067 void tone_detection (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1068 Word16 rc[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1069 Word16 *tone
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1070 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1071 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1072 Word32 L_num, L_den, L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1073 Word16 temp, prederr, a[3];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1074 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1075
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1076 *tone = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1077
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1078 /* Calculate filter coefficients */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1079
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1080 step_up (2, rc, a);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1081
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1082 /*** Calculate ( a[1] * a[1] ) ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1083
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1084 temp = shl (a[1], 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1085 L_den = L_mult (temp, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1086
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1087 /*** Calculate ( 4a[2] - a[1]a[1] ) ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1088
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1089 L_temp = L_shl (L_deposit_h (a[2]), 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1090 L_num = L_sub (L_temp, L_den);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1091
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1092 /* Check if pole frequency is less than 385 Hz */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1093
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1094 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1095 if (L_num <= 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1096 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1097 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1098 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1099 test (); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1100 if (a[1] < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1101 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1102 temp = extract_h (L_den);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1103 L_den = L_mult (temp, FREQTH);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1104
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1105 L_temp = L_sub (L_num, L_den);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1106
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1107 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1108 if (L_temp < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1109 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1110 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1111 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1112 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1113 /* Calculate normalised prediction error */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1114
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1115 prederr = 0x7fff; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1116
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1117 for (i = 0; i < 4; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1118 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1119 temp = mult (rc[i], rc[i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1120 temp = sub (0x7fff, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1121 prederr = mult (prederr, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1122 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1123
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1124 /* Test if prediction error is smaller than threshold */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1125
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1126 temp = sub (prederr, PREDTH);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1127
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1128 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1129 if (temp < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1130 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1131 *tone = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1132 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1133 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1134 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1135
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1136 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1137 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1138 * FUNCTION: vad_decision
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1139 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1140 * PURPOSE: Computes the VAD decision based on the comparison of the
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1141 * floating point representations of pvad and thvad.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1142 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1143 * INPUTS: pvad filtered signal energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1144 * thvad decision threshold (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1145 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1146 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1147 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1148 * RETURN VALUE: vad decision before hangover is added
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1149 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1150 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1151
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1152 Word16 vad_decision (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1153 Pfloat pvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1154 Pfloat thvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1155 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1156 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1157 Word16 vvad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1158
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1159 test (); test (); test ();
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1160 if (pvad.e > thvad.e)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1161 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1162 vvad = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1163 }
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1164 else if ((pvad.e == thvad.e) &&
1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1165 (pvad.m > thvad.m))
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1166 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1167 vvad = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1168 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1169 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1170 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1171 vvad = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1172 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1173
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1174 return vvad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1175 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1176
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1177 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1178 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1179 * FUNCTION: vad_hangover
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1180 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1181 * PURPOSE: Computes the final VAD decision for the current frame
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1182 * being processed.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1183 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1184 * INPUTS: vvad vad decision before hangover is added
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1185 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1186 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1187 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1188 * RETURN VALUE: vad decision after hangover is added
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1189 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1190 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1191
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1192 Word16 vad_hangover (
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1193 struct EFR_encoder_state *st,
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1194 Word16 vvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1195 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1196 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1197 struct vad_state *vst = &st->vad;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1198
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1199 if (vvad == 1)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1200 {
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1201 vst->burstcount++;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1202 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1203 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1204 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1205 vst->burstcount = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1206 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1207
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1208 if (vst->burstcount >= BURSTCONST)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1209 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1210 vst->hangcount = HANGCONST;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1211 vst->burstcount = BURSTCONST;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1212 }
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1213 if (vst->hangcount >= 0)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1214 {
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1215 vst->hangcount--;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1216 return 1; /* vad = 1 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1217 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1218 return vvad; /* vad = vvad */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1219 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1220
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1221 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1222 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1223 * FUNCTION: periodicity_update
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1224 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1225 * PURPOSE: Computes the ptch flag needed for the threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1226 * adaptation decision for the next frame.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1227 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1228 * INPUTS: lags[0..1] speech encoder long term predictor lags
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1229 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1230 * OUTPUTS: *ptch Boolean voiced / unvoiced decision
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1231 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1232 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1233 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1234 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1235
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1236 void periodicity_update (
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1237 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1238 Word16 lags[]
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1239 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1240 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1241 struct vad_state *vst = &st->vad;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1242 Word16 minlag, maxlag, lagcount, temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1243 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1244
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1245 /* Run loop for the two halves in the frame */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1246
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1247 lagcount = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1248
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1249 for (i = 0; i <= 1; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1250 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1251 /* Search the maximum and minimum of consecutive lags */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1252
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1253 if (vst->oldlag > lags[i])
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1254 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1255 minlag = lags[i];
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1256 maxlag = vst->oldlag;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1257 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1258 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1259 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1260 minlag = vst->oldlag;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1261 maxlag = lags[i];
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1262 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1263
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1264 temp = sub (maxlag, minlag);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1265
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1266 if (temp < LTHRESH)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1267 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1268 lagcount = add (lagcount, 1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1269 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1270 /* Save the current LTP lag */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1271
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1272 vst->oldlag = lags[i];
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1273 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1274
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1275 /* Update the veryoldlagcount and oldlagcount */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1276
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1277 vst->veryoldlagcount = vst->oldlagcount;
756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1278 vst->oldlagcount = lagcount;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1279
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1280 /* Make ptch decision ready for next frame */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1281
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1282 temp = add (vst->oldlagcount, vst->veryoldlagcount);
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1283
203 1c108dd5b33f libgsmefr/vad.c: perf opt Mychaela Falconia <falcon@freecalypso.org> parents: 111 diff changeset	1284 if (temp >= NTHRESH)
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1285 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1286 st->ptch = 1;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1287 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1288 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1289 {
111 756605c4850f libgsmefr: vad.c compiles Mychaela Falconia <falcon@freecalypso.org> parents: 110 diff changeset	1290 st->ptch = 0;
110 913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1291 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1292
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1293 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1294 }

FreeCalypso > hg > gsm-codec-lib

annotate libgsmefr/vad.c @ 485:751f06541fbb