gsm-codec-lib: libtwamr/vad1.c annotate

annotate libtwamr/vad1.c @ 478:936a08cc73ce

doc/AMR-library-API: describe the decoder

author	Mychaela Falconia <falcon@freecalypso.org>
date	Sun, 19 May 2024 21:32:31 +0000
parents	8847c1740e78
children

rev	line source
408 8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	2 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	3 -------------------------------------------------------------------------
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	4
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	5 GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	6 R99 Version 3.3.0
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	7 REL-4 Version 4.1.0
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	8
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	9 -------------------------------------------------------------------------
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	10 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	11 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	12 * File : vad1.c
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	13 * Purpose : Voice Activity Detection (VAD) for AMR (option 1)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	14 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	15 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	16 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	17
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	18 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	19 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	20 * MODULE INCLUDE FILE AND VERSION ID
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	21 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	22 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	23 #include "namespace.h"
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	24 #include "vad1.h"
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	25
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	26 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	27 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	28 * INCLUDE FILES
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	29 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	30 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	31 #include "typedef.h"
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	32 #include "basic_op.h"
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	33 #include "no_count.h"
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	34 #include "oper_32b.h"
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	35 #include "cnst_vad.h"
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	36
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	37 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	38 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	39 * LOCAL VARIABLES AND TABLES
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	40 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	41 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	42
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	43 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	44 ********************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	45 * PRIVATE PROGRAM CODE
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	46 ********************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	47 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	48 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	49 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	50 * Function : first_filter_stage
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	51 * Purpose : Scale input down by one bit. Calculate 5th order
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	52 * half-band lowpass/highpass filter pair with
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	53 * decimation.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	54 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	55 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	56 static void first_filter_stage(Word16 in[], /* i : input signal */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	57 Word16 out[], /* o : output values, every other */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	58 /* output is low-pass part and */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	59 /* other is high-pass part every */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	60 Word16 data[] /* i/o : filter memory */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	61 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	62 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	63 Word16 temp0, temp1, temp2, temp3, i;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	64 Word16 data0, data1;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	65
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	66 data0 = data[0]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	67 data1 = data[1]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	68
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	69 for (i = 0; i < FRAME_LEN/4; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	70 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	71 temp0 = sub(shr(in[4*i+0], 2), mult(COEFF5_1, data0));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	72 temp1 = add(data0, mult(COEFF5_1, temp0));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	73
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	74 temp3 = sub(shr(in[4*i+1], 2), mult(COEFF5_2, data1));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	75 temp2 = add(data1, mult(COEFF5_2, temp3));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	76
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	77 out[4*i+0] = add(temp1, temp2); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	78 out[4*i+1] = sub(temp1, temp2); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	79
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	80 data0 = sub(shr(in[4*i+2], 2), mult(COEFF5_1, temp0));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	81 temp1 = add(temp0, mult(COEFF5_1, data0));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	82
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	83 data1 = sub(shr(in[4*i+3], 2), mult(COEFF5_2, temp3));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	84 temp2 = add(temp3, mult(COEFF5_2, data1));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	85
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	86 out[4*i+2] = add(temp1, temp2); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	87 out[4*i+3] = sub(temp1, temp2); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	88 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	89
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	90 data[0] = data0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	91 data[1] = data1; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	92 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	93
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	94 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	95 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	96 * Function : filter5
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	97 * Purpose : Fifth-order half-band lowpass/highpass filter pair with
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	98 * decimation.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	99 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	100 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	101 static void filter5(Word16 in0, / i/o : input values; output low-pass part */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	102 Word16 in1, / i/o : input values; output high-pass part */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	103 Word16 data[] /* i/o : updated filter memory */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	104 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	105 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	106 Word16 temp0, temp1, temp2;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	107
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	108 temp0 = sub(*in0, mult(COEFF5_1, data[0]));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	109 temp1 = add(data[0], mult(COEFF5_1, temp0));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	110 data[0] = temp0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	111
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	112 temp0 = sub(*in1, mult(COEFF5_2, data[1]));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	113 temp2 = add(data[1], mult(COEFF5_2, temp0));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	114 data[1] = temp0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	115
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	116 *in0 = shr(add(temp1, temp2), 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	117 *in1 = shr(sub(temp1, temp2), 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	118 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	119
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	120 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	121 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	122 * Function : filter3
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	123 * Purpose : Third-order half-band lowpass/highpass filter pair with
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	124 * decimation.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	125 * Return value :
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	126 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	127 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	128 static void filter3(Word16 in0, / i/o : input values; output low-pass part */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	129 Word16 in1, / i/o : input values; output high-pass part */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	130 Word16 data / i/o : updated filter memory */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	131 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	132 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	133 Word16 temp1, temp2;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	134
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	135 temp1 = sub(in1, mult(COEFF3, data));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	136 temp2 = add(*data, mult(COEFF3, temp1));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	137 *data = temp1; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	138
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	139 in1 = shr(sub(in0, temp2), 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	140 in0 = shr(add(in0, temp2), 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	141 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	142
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	143 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	144 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	145 * Function : level_calculation
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	146 * Purpose : Calculate signal level in a sub-band. Level is calculated
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	147 * by summing absolute values of the input data.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	148 * Return value : signal level
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	149 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	150 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	151 static Word16 level_calculation(
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	152 Word16 data[], /* i : signal buffer */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	153 Word16 sub_level, / i : level calculate at the end of the previous frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	154 /* o : level of signal calculated from the last */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	155 /* (count2 - count1) samples */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	156 Word16 count1, /* i : number of samples to be counted */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	157 Word16 count2, /* i : number of samples to be counted */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	158 Word16 ind_m, /* i : step size for the index of the data buffer */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	159 Word16 ind_a, /* i : starting index of the data buffer */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	160 Word16 scale /* i : scaling for the level calculation */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	161 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	162 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	163 Word32 l_temp1, l_temp2;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	164 Word16 level, i;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	165
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	166 l_temp1 = 0L; move32 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	167 for (i = count1; i < count2; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	168 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	169 l_temp1 = L_mac(l_temp1, 1, abs_s(data[ind_m*i+ind_a]));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	170 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	171
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	172 l_temp2 = L_add(l_temp1, L_shl(*sub_level, sub(16, scale)));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	173 *sub_level = extract_h(L_shl(l_temp1, scale));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	174
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	175 for (i = 0; i < count1; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	176 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	177 l_temp2 = L_mac(l_temp2, 1, abs_s(data[ind_m*i+ind_a]));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	178 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	179 level = extract_h(L_shl(l_temp2, scale));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	180
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	181 return level;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	182 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	183
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	184 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	185 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	186 * Function : filter_bank
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	187 * Purpose : Divides input signal into 9-bands and calculas level of
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	188 * the signal in each band
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	189 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	190 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	191 static void filter_bank(vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	192 Word16 in[], /* i : input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	193 Word16 level[] /* 0 : signal levels at each band */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	194 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	195 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	196 Word16 i;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	197 Word16 tmp_buf[FRAME_LEN];
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	198
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	199 /* calculate the filter bank */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	200
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	201 first_filter_stage(in, tmp_buf, st->a_data5[0]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	202
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	203 for (i = 0; i < FRAME_LEN/4; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	204 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	205 filter5(&tmp_buf[4i], &tmp_buf[4i+2], st->a_data5[1]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	206 filter5(&tmp_buf[4i+1], &tmp_buf[4i+3], st->a_data5[2]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	207 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	208 for (i = 0; i < FRAME_LEN/8; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	209 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	210 filter3(&tmp_buf[8i+0], &tmp_buf[8i+4], &st->a_data3[0]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	211 filter3(&tmp_buf[8i+2], &tmp_buf[8i+6], &st->a_data3[1]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	212 filter3(&tmp_buf[8i+3], &tmp_buf[8i+7], &st->a_data3[4]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	213 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	214
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	215 for (i = 0; i < FRAME_LEN/16; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	216 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	217 filter3(&tmp_buf[16i+0], &tmp_buf[16i+8], &st->a_data3[2]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	218 filter3(&tmp_buf[16i+4], &tmp_buf[16i+12], &st->a_data3[3]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	219 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	220
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	221 /* calculate levels in each frequency band */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	222
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	223 /* 3000 - 4000 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	224 level[8] = level_calculation(tmp_buf, &st->sub_level[8], FRAME_LEN/4-8,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	225 FRAME_LEN/4, 4, 1, 15);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	226 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	227 /* 2500 - 3000 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	228 level[7] = level_calculation(tmp_buf, &st->sub_level[7], FRAME_LEN/8-4,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	229 FRAME_LEN/8, 8, 7, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	230 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	231 /* 2000 - 2500 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	232 level[6] = level_calculation(tmp_buf, &st->sub_level[6], FRAME_LEN/8-4,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	233 FRAME_LEN/8, 8, 3, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	234 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	235 /* 1500 - 2000 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	236 level[5] = level_calculation(tmp_buf, &st->sub_level[5], FRAME_LEN/8-4,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	237 FRAME_LEN/8, 8, 2, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	238 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	239 /* 1000 - 1500 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	240 level[4] = level_calculation(tmp_buf, &st->sub_level[4], FRAME_LEN/8-4,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	241 FRAME_LEN/8, 8, 6, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	242 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	243 /* 750 - 1000 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	244 level[3] = level_calculation(tmp_buf, &st->sub_level[3], FRAME_LEN/16-2,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	245 FRAME_LEN/16, 16, 4, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	246 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	247 /* 500 - 750 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	248 level[2] = level_calculation(tmp_buf, &st->sub_level[2], FRAME_LEN/16-2,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	249 FRAME_LEN/16, 16, 12, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	250 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	251 /* 250 - 500 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	252 level[1] = level_calculation(tmp_buf, &st->sub_level[1], FRAME_LEN/16-2,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	253 FRAME_LEN/16, 16, 8, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	254 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	255 /* 0 - 250 Hz*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	256 level[0] = level_calculation(tmp_buf, &st->sub_level[0], FRAME_LEN/16-2,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	257 FRAME_LEN/16, 16, 0, 16);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	258 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	259 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	260
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	261 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	262 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	263 * Function : update_cntrl
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	264 * Purpose : Control update of the background noise estimate.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	265 * Inputs : pitch: flags for pitch detection
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	266 * stat_count: stationary counter
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	267 * tone: flags indicating presence of a tone
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	268 * complex: flags for complex detection
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	269 * vadreg: intermediate VAD flags
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	270 * Output : stat_count: stationary counter
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	271 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	272 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	273 static void update_cntrl(vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	274 Word16 level[] /* i : sub-band levels of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	275 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	276 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	277 Word16 i, temp, stat_rat, exp;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	278 Word16 num, denom;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	279 Word16 alpha;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	280
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	281 /* handle highband complex signal input separately */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	282 /* if ther has been highband correlation for some time */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	283 /* make sure that the VAD update speed is low for a while */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	284 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	285 if (st->complex_warning != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	286 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	287 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	288 if (sub(st->stat_count, CAD_MIN_STAT_COUNT) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	289 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	290 st->stat_count = CAD_MIN_STAT_COUNT; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	291 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	292 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	293 /* NB stat_count is allowed to be decreased by one below again */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	294 /* deadlock in speech is not possible unless the signal is very */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	295 /* complex and need a high rate */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	296
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	297 /* if fullband pitch or tone have been detected for a while, initialize stat_count */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	298 logic16 (); test (); logic16 (); test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	299 if ((sub((st->pitch & 0x6000), 0x6000) == 0) \|\|
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	300 (sub((st->tone & 0x7c00), 0x7c00) == 0))
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	301 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	302 st->stat_count = STAT_COUNT; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	303 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	304 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	305 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	306 /* if 8 last vad-decisions have been "0", reinitialize stat_count */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	307 logic16 (); test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	308 if ((st->vadreg & 0x7f80) == 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	309 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	310 st->stat_count = STAT_COUNT; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	311 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	312 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	313 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	314 stat_rat = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	315 for (i = 0; i < COMPLEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	316 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	317 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	318 if (sub(level[i], st->ave_level[i]) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	319 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	320 num = level[i]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	321 denom = st->ave_level[i]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	322 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	323 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	324 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	325 num = st->ave_level[i]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	326 denom = level[i]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	327 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	328 /* Limit nimimum value of num and denom to STAT_THR_LEVEL */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	329 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	330 if (sub(num, STAT_THR_LEVEL) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	331 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	332 num = STAT_THR_LEVEL; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	333 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	334 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	335 if (sub(denom, STAT_THR_LEVEL) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	336 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	337 denom = STAT_THR_LEVEL; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	338 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	339
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	340 exp = norm_s(denom);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	341 denom = shl(denom, exp);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	342
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	343 /* stat_rat = num/denom * 64 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	344 temp = div_s(shr(num, 1), denom);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	345 stat_rat = add(stat_rat, shr(temp, sub(8, exp)));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	346 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	347
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	348 /* compare stat_rat with a threshold and update stat_count */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	349 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	350 if (sub(stat_rat, STAT_THR) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	351 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	352 st->stat_count = STAT_COUNT; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	353 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	354 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	355 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	356 logic16 ();test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	357 if ((st->vadreg & 0x4000) != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	358 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	359 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	360 if (st->stat_count != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	361 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	362 st->stat_count = sub(st->stat_count, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	363 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	364 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	365 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	366 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	367 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	368
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	369 /* Update average amplitude estimate for stationarity estimation */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	370 alpha = ALPHA4; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	371 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	372 if (sub(st->stat_count, STAT_COUNT) == 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	373 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	374 alpha = 32767; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	375 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	376 else if ((st->vadreg & 0x4000) == 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	377 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	378 logic16 (); test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	379 alpha = ALPHA5; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	380 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	381
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	382 for (i = 0; i < COMPLEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	383 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	384 st->ave_level[i] = add(st->ave_level[i],
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	385 mult_r(alpha, sub(level[i], st->ave_level[i])));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	386 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	387 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	388 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	389
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	390 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	391 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	392 * Function : hangover_addition
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	393 * Purpose : Add hangover for complex signal or after speech bursts
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	394 * Inputs : burst_count: counter for the length of speech bursts
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	395 * hang_count: hangover counter
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	396 * vadreg: intermediate VAD decision
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	397 * Outputs : burst_count: counter for the length of speech bursts
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	398 * hang_count: hangover counter
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	399 * Return value : VAD_flag indicating final VAD decision
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	400 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	401 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	402 static Word16 hangover_addition(
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	403 vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	404 Word16 noise_level, /* i : average level of the noise */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	405 /* estimates */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	406 Word16 low_power /* i : flag power of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	407 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	408 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	409 Word16 hang_len, burst_len;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	410
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	411 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	412 Calculate burst_len and hang_len
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	413 burst_len: number of consecutive intermediate vad flags with "1"-decision
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	414 required for hangover addition
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	415 hang_len: length of the hangover
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	416 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	417
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	418 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	419 if (sub(noise_level, HANG_NOISE_THR) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	420 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	421 burst_len = BURST_LEN_HIGH_NOISE; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	422 hang_len = HANG_LEN_HIGH_NOISE; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	423 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	424 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	425 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	426 burst_len = BURST_LEN_LOW_NOISE; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	427 hang_len = HANG_LEN_LOW_NOISE; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	428 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	429
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	430 /* if the input power (pow_sum) is lower than a threshold, clear
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	431 counters and set VAD_flag to "0" "fast exit" */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	432 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	433 if (low_power != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	434 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	435 st->burst_count = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	436 st->hang_count = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	437 st->complex_hang_count = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	438 st->complex_hang_timer = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	439 return 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	440 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	441
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	442 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	443 if (sub(st->complex_hang_timer, CVAD_HANG_LIMIT) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	444 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	445 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	446 if (sub(st->complex_hang_count, CVAD_HANG_LENGTH) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	447 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	448 st->complex_hang_count = CVAD_HANG_LENGTH; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	449 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	450 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	451
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	452 /* long time very complex signal override VAD output function */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	453 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	454 if (st->complex_hang_count != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	455 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	456 st->burst_count = BURST_LEN_HIGH_NOISE; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	457 st->complex_hang_count = sub(st->complex_hang_count, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	458 return 1;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	459 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	460 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	461 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	462 /* let hp_corr work in from a noise_period indicated by the VAD */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	463 test (); test (); logic16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	464 if (((st->vadreg & 0x3ff0) == 0) &&
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	465 (sub(st->corr_hp_fast, CVAD_THRESH_IN_NOISE) > 0))
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	466 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	467 return 1;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	468 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	469 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	470
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	471 /* update the counters (hang_count, burst_count) */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	472 logic16 (); test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	473 if ((st->vadreg & 0x4000) != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	474 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	475 st->burst_count = add(st->burst_count, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	476 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	477 if (sub(st->burst_count, burst_len) >= 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	478 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	479 st->hang_count = hang_len; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	480 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	481 return 1;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	482 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	483 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	484 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	485 st->burst_count = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	486 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	487 if (st->hang_count > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	488 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	489 st->hang_count = sub(st->hang_count, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	490 return 1;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	491 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	492 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	493 return 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	494 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	495
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	496 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	497 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	498 * Function : noise_estimate_update
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	499 * Purpose : Update of background noise estimate
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	500 * Inputs : bckr_est: background noise estimate
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	501 * pitch: flags for pitch detection
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	502 * stat_count: stationary counter
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	503 * Outputs : bckr_est: background noise estimate
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	504 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	505 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	506 static void noise_estimate_update(
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	507 vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	508 Word16 level[] /* i : sub-band levels of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	509 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	510 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	511 Word16 i, alpha_up, alpha_down, bckr_add;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	512
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	513 /* Control update of bckr_est[] */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	514 update_cntrl(st, level);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	515
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	516 /* Choose update speed */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	517 bckr_add = 2; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	518
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	519 logic16 (); test (); logic16 (); test (); test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	520 if (((0x7800 & st->vadreg) == 0) &&
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	521 ((st->pitch & 0x7800) == 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	522 && (st->complex_hang_count == 0))
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	523 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	524 alpha_up = ALPHA_UP1; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	525 alpha_down = ALPHA_DOWN1; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	526 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	527 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	528 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	529 test (); test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	530 if ((st->stat_count == 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	531 && (st->complex_hang_count == 0))
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	532 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	533 alpha_up = ALPHA_UP2; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	534 alpha_down = ALPHA_DOWN2; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	535 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	536 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	537 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	538 alpha_up = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	539 alpha_down = ALPHA3; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	540 bckr_add = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	541 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	542 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	543
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	544 /* Update noise estimate (bckr_est) */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	545 for (i = 0; i < COMPLEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	546 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	547 Word16 temp;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	548 temp = sub(st->old_level[i], st->bckr_est[i]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	549
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	550 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	551 if (temp < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	552 { /* update downwards*/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	553 st->bckr_est[i] = add(-2, add(st->bckr_est[i], mult_r(alpha_down, temp)));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	554 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	555
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	556 /* limit minimum value of the noise estimate to NOISE_MIN */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	557 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	558 if (sub(st->bckr_est[i], NOISE_MIN) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	559 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	560 st->bckr_est[i] = NOISE_MIN; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	561 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	562 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	563 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	564 { /* update upwards */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	565 st->bckr_est[i] = add(bckr_add, add(st->bckr_est[i], mult_r(alpha_up, temp)));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	566 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	567
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	568 /* limit maximum value of the noise estimate to NOISE_MAX */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	569 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	570 if (sub(st->bckr_est[i], NOISE_MAX) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	571 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	572 st->bckr_est[i] = NOISE_MAX; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	573 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	574 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	575 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	576
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	577 /* Update signal levels of the previous frame (old_level) */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	578 for(i = 0; i < COMPLEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	579 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	580 st->old_level[i] = level[i]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	581 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	582 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	583
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	584 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	585 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	586 * Function : complex_estimate_adapt
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	587 * Purpose : Update/adapt of complex signal estimate
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	588 * Inputs : low_power: low signal power flag
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	589 * Outputs : st->corr_hp_fast: long term complex signal estimate
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	590 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	591 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	592 static void complex_estimate_adapt(
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	593 vadState1 st, / i/o : VAD state struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	594 Word16 low_power /* i : very low level flag of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	595 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	596 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	597 Word16 alpha; /* Q15 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	598 Word32 L_tmp; /* Q31 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	599
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	600
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	601 /* adapt speed on own state */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	602 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	603 if (sub(st->best_corr_hp, st->corr_hp_fast) < 0) /* decrease */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	604 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	605 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	606 if (sub(st->corr_hp_fast, CVAD_THRESH_ADAPT_HIGH) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	607 { /* low state */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	608 alpha = CVAD_ADAPT_FAST; move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	609 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	610 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	611 { /* high state */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	612 alpha = CVAD_ADAPT_REALLY_FAST; move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	613 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	614 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	615 else /* increase */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	616 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	617 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	618 if (sub(st->corr_hp_fast, CVAD_THRESH_ADAPT_HIGH) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	619 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	620 alpha = CVAD_ADAPT_FAST; move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	621 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	622 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	623 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	624 alpha = CVAD_ADAPT_SLOW; move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	625 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	626 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	627
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	628 L_tmp = L_deposit_h(st->corr_hp_fast);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	629 L_tmp = L_msu(L_tmp, alpha, st->corr_hp_fast);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	630 L_tmp = L_mac(L_tmp, alpha, st->best_corr_hp);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	631 st->corr_hp_fast = round(L_tmp); /* Q15 */ move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	632
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	633 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	634 if (sub(st->corr_hp_fast, CVAD_MIN_CORR) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	635 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	636 st->corr_hp_fast = CVAD_MIN_CORR; move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	637 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	638
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	639 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	640 if (low_power != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	641 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	642 st->corr_hp_fast = CVAD_MIN_CORR; move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	643 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	644 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	645
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	646 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	647 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	648 * Function : complex_vad
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	649 * Purpose : complex background decision
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	650 * Return value : the complex background decision
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	651 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	652 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	653 static Word16 complex_vad(vadState1 st, / i/o : VAD state struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	654 Word16 low_power /* i : flag power of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	655 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	656 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	657 st->complex_high = shr(st->complex_high, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	658 st->complex_low = shr(st->complex_low, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	659
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	660 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	661 if (low_power == 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	662 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	663 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	664 if (sub(st->corr_hp_fast, CVAD_THRESH_ADAPT_HIGH) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	665 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	666 st->complex_high = st->complex_high \| 0x4000; logic16 (); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	667 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	668
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	669 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	670 if (sub(st->corr_hp_fast, CVAD_THRESH_ADAPT_LOW) > 0 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	671 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	672 st->complex_low = st->complex_low \| 0x4000; logic16 (); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	673 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	674 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	675
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	676 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	677 if (sub(st->corr_hp_fast, CVAD_THRESH_HANG) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	678 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	679 st->complex_hang_timer = add(st->complex_hang_timer, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	680 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	681 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	682 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	683 st->complex_hang_timer = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	684 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	685
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	686 test (); logic16 (); test (); logic16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	687 return ((sub((st->complex_high & 0x7f80), 0x7f80) == 0) \|\|
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	688 (sub((st->complex_low & 0x7fff), 0x7fff) == 0));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	689 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	690
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	691 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	692 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	693 * Function : vad_decision
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	694 * Purpose : Calculates VAD_flag
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	695 * Inputs : bckr_est: background noise estimate
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	696 * vadreg: intermediate VAD flags
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	697 * Outputs : noise_level: average level of the noise estimates
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	698 * vadreg: intermediate VAD flags
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	699 * Return value : VAD_flag
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	700 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	701 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	702 static Word16 vad_decision(
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	703 vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	704 Word16 level[COMPLEN], /* i : sub-band levels of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	705 Word32 pow_sum /* i : power of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	706 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	707 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	708 Word16 i;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	709 Word16 snr_sum;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	710 Word32 L_temp;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	711 Word16 vad_thr, temp, noise_level;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	712 Word16 low_power_flag;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	713
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	714 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	715 Calculate squared sum of the input levels (level)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	716 divided by the background noise components (bckr_est).
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	717 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	718 L_temp = 0; move32();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	719 for (i = 0; i < COMPLEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	720 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	721 Word16 exp;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	722
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	723 exp = norm_s(st->bckr_est[i]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	724 temp = shl(st->bckr_est[i], exp);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	725 temp = div_s(shr(level[i], 1), temp);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	726 temp = shl(temp, sub(exp, UNIRSHFT-1));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	727 L_temp = L_mac(L_temp, temp, temp);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	728 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	729 snr_sum = extract_h(L_shl(L_temp, 6));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	730 snr_sum = mult(snr_sum, INV_COMPLEN);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	731
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	732 /* Calculate average level of estimated background noise */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	733 L_temp = 0; move32();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	734 for (i = 0; i < COMPLEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	735 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	736 L_temp = L_add(L_temp, st->bckr_est[i]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	737 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	738
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	739 noise_level = extract_h(L_shl(L_temp, 13));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	740
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	741 /* Calculate VAD threshold */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	742 vad_thr = add(mult(VAD_SLOPE, sub(noise_level, VAD_P1)), VAD_THR_HIGH);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	743
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	744 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	745 if (sub(vad_thr, VAD_THR_LOW) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	746 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	747 vad_thr = VAD_THR_LOW; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	748 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	749
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	750 /* Shift VAD decision register */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	751 st->vadreg = shr(st->vadreg, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	752
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	753 /* Make intermediate VAD decision */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	754 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	755 if (sub(snr_sum, vad_thr) > 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	756 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	757 st->vadreg = st->vadreg \| 0x4000; logic16 (); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	758 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	759 /* primary vad decsion made */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	760
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	761 /* check if the input power (pow_sum) is lower than a threshold" */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	762 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	763 if (L_sub(pow_sum, VAD_POW_LOW) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	764 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	765 low_power_flag = 1; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	766 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	767 else
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	768 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	769 low_power_flag = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	770 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	771
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	772 /* update complex signal estimate st->corr_hp_fast and hangover reset timer using */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	773 /* low_power_flag and corr_hp_fast and various adaptation speeds */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	774 complex_estimate_adapt(st, low_power_flag);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	775
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	776 /* check multiple thresholds of the st->corr_hp_fast value */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	777 st->complex_warning = complex_vad(st, low_power_flag); move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	778
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	779 /* Update speech subband vad background noise estimates */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	780 noise_estimate_update(st, level);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	781
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	782 /* Add speech and complex hangover and return speech VAD_flag */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	783 /* long term complex hangover may be added */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	784 st->speech_vad_decision = hangover_addition(st, noise_level, low_power_flag);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	785 move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	786
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	787 return (st->speech_vad_decision);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	788 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	789
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	790 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	791 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	792 * PUBLIC PROGRAM CODE
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	793 *****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	794 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	795
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	796 /*************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	797 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	798 * Function: vad1_reset
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	799 * Purpose: Initializes state memory to zero
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	800 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	801 **************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	802 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	803 void vad1_reset (vadState1 *state)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	804 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	805 Word16 i, j;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	806
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	807 /* Initialize pitch detection variables */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	808 state->oldlag_count = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	809 state->oldlag = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	810 state->pitch = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	811 state->tone = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	812
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	813 state->complex_high = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	814 state->complex_low = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	815 state->complex_hang_timer = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	816
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	817 state->vadreg = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	818
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	819 state->stat_count = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	820 state->burst_count = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	821 state->hang_count = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	822 state->complex_hang_count = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	823
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	824 /* initialize memory used by the filter bank */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	825 for (i = 0; i < 3; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	826 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	827 for (j = 0; j < 2; j++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	828 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	829 state->a_data5[i][j] = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	830 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	831 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	832
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	833 for (i = 0; i < 5; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	834 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	835 state->a_data3[i] = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	836 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	837
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	838 /* initialize the rest of the memory */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	839 for (i = 0; i < COMPLEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	840 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	841 state->bckr_est[i] = NOISE_INIT;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	842 state->old_level[i] = NOISE_INIT;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	843 state->ave_level[i] = NOISE_INIT;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	844 state->sub_level[i] = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	845 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	846
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	847 state->best_corr_hp = CVAD_LOWPOW_RESET;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	848
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	849 state->speech_vad_decision = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	850 state->complex_warning = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	851 state->sp_burst_count = 0;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	852
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	853 state->corr_hp_fast = CVAD_LOWPOW_RESET;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	854 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	855
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	856 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	857 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	858 * Function : vad_complex_detection_update
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	859 * Purpose : update vad->bestCorr_hp complex signal feature state
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	860 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	861 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	862 void vad_complex_detection_update (vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	863 Word16 best_corr_hp /* i : best Corr */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	864 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	865 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	866 st->best_corr_hp = best_corr_hp; move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	867 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	868
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	869 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	870 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	871 * Function : vad_tone_detection
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	872 * Purpose : Set tone flag if pitch gain is high. This is used to detect
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	873 * signaling tones and other signals with high pitch gain.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	874 * Inputs : tone: flags indicating presence of a tone
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	875 * Outputs : tone: flags indicating presence of a tone
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	876 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	877 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	878 void vad_tone_detection (vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	879 Word32 t0, /* i : autocorrelation maxima */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	880 Word32 t1 /* i : energy */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	881 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	882 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	883 Word16 temp;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	884 /*
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	885 if (t0 > TONE_THR * t1)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	886 set tone flag
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	887 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	888 temp = round(t1);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	889
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	890 test (); test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	891 if ((temp > 0) && (L_msu(t0, temp, TONE_THR) > 0))
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	892 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	893 st->tone = st->tone \| 0x4000; logic16 (); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	894 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	895 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	896
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	897 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	898 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	899 * Function : vad_tone_detection_update
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	900 * Purpose : Update the tone flag register. Tone flags are shifted right
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	901 * by one bit. This function should be called from the speech
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	902 * encoder before call to Vad_tone_detection() function.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	903 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	904 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	905 void vad_tone_detection_update (
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	906 vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	907 Word16 one_lag_per_frame /* i : 1 if one open-loop lag is
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	908 calculated per each frame,
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	909 otherwise 0 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	910 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	911 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	912 /* Shift tone flags right by one bit */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	913 st->tone = shr(st->tone, 1); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	914
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	915 /* If open-loop lag is calculated only once in each frame, do extra update
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	916 and assume that the other tone flag of the frame is one. */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	917 if (one_lag_per_frame != 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	918 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	919 st->tone = shr(st->tone, 1);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	920 st->tone = st->tone \| 0x2000; logic16 (); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	921 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	922 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	923
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	924 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	925 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	926 * Function : vad_pitch_detection
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	927 * Purpose : Test whether signal contains pitch or other periodic
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	928 * component.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	929 * Return value : Boolean voiced / unvoiced decision in state variable
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	930 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	931 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	932 void vad_pitch_detection (vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	933 Word16 T_op[] /* i : speech encoder open loop lags */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	934 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	935 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	936 Word16 lagcount, i;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	937
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	938 lagcount = 0; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	939
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	940 for (i = 0; i < 2; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	941 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	942 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	943 if (sub (abs_s (sub (st->oldlag, T_op[i])), LTHRESH) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	944 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	945 lagcount = add (lagcount, 1);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	946 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	947
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	948 /* Save the current LTP lag */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	949 st->oldlag = T_op[i]; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	950 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	951
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	952 /* Make pitch decision.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	953 Save flag of the pitch detection to the variable pitch.
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	954 */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	955 st->pitch = shr(st->pitch, 1); move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	956
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	957 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	958 if (sub ( add (st->oldlag_count, lagcount), NTHRESH) >= 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	959 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	960 st->pitch = st->pitch \| 0x4000; logic16(); move16();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	961 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	962
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	963 /* Update oldlagcount */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	964 st->oldlag_count = lagcount; move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	965 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	966
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	967 /****************************************************************************
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	968 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	969 * Function : vad
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	970 * Purpose : Main program for Voice Activity Detection (VAD) for AMR
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	971 * Return value : VAD Decision, 1 = speech, 0 = noise
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	972 *
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	973 ***************************************************************************/
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	974 Word16 vad1(vadState1 st, / i/o : State struct */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	975 Word16 in_buf[] /* i : samples of the input frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	976 )
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	977 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	978 Word16 level[COMPLEN];
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	979 Word32 pow_sum;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	980 Word16 i;
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	981
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	982 /* Calculate power of the input frame. */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	983 pow_sum = 0L; move32 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	984
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	985 for (i = 0; i < FRAME_LEN; i++)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	986 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	987 pow_sum = L_mac(pow_sum, in_buf[i-LOOKAHEAD], in_buf[i-LOOKAHEAD]);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	988 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	989
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	990 /* If input power is very low, clear pitch flag of the current frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	991 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	992 if (L_sub(pow_sum, POW_PITCH_THR) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	993 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	994 st->pitch = st->pitch & 0x3fff; logic16 (); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	995 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	996
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	997 /* If input power is very low, clear complex flag of the "current" frame */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	998 test ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	999 if (L_sub(pow_sum, POW_COMPLEX_THR) < 0)
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1000 {
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1001 st->complex_low = st->complex_low & 0x3fff; logic16 (); move16 ();
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1002 }
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1003
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1004 /* Run the filter bank which calculates signal levels at each band */
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1005 filter_bank(st, in_buf, level);
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1006
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1007 return (vad_decision(st, level, pow_sum));
8847c1740e78 libtwamr: integrate VAD1 Mychaela Falconia <falcon@freecalypso.org> parents: diff changeset	1008 }

FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/vad1.c @ 478:936a08cc73ce