14f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* ------------------------------------------------------------------ 24f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Copyright (C) 1998-2009 PacketVideo 34f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 44f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 54f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * you may not use this file except in compliance with the License. 64f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * You may obtain a copy of the License at 74f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 84f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 94f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Unless required by applicable law or agreed to in writing, software 114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * express or implied. 144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * See the License for the specific language governing permissions 154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * and limitations under the License. 164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ------------------------------------------------------------------- 174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/**************************************************************************************** 194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPortions of this file are derived from the following 3GPP standard: 204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3GPP TS 26.073 224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Available from http://www.3gpp.org 244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPermission to distribute, modify and use this file under the standard license 274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberterms listed above has been obtained from the copyright holder. 284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber****************************************************************************************/ 294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Filename: /audio/gsm_amr/c/src/include/bgnscd.h 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 12/29/2002 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Moved _cplusplus #ifdef after Include section. 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INCLUDE DESCRIPTION 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber File : bgnscd.h 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Purpose : Background noise source charateristic detector (SCD) 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifndef _BGNSCD_H_ 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define _BGNSCD_H_ 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*--------------------------------------------------------------------------*/ 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberextern "C" 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; MACROS 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [Define module specific macros here] 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; DEFINES 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [Include all pre-processor statements here.] 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define L_ENERGYHIST 60 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define INV_L_FRAME 102 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 2*(160*x)^2 / 65536 where x is FLP values 150,5 and 50 */ 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define FRAMEENERGYLIMIT 17578 /* 150 */ 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define LOWERNOISELIMIT 20 /* 5 */ 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define UPPERNOISELIMIT 1953 /* 50 */ 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; EXTERNAL VARIABLES REFERENCES 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [Declare variables used in this module but defined elsewhere] 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; SIMPLE TYPEDEF'S 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; ENUMERATED TYPEDEF'S 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; STRUCTURES TYPEDEF'S 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber typedef struct 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* history vector of past synthesis speech energy */ 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 frameEnergyHist[L_ENERGYHIST]; 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* state flags */ 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 bgHangover; /* counter; number of frames after last speech frame */ 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } Bgn_scdState; 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; GLOBAL FUNCTION DEFINITIONS 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [List function prototypes here] 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Function : Bgn_scd_init 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Purpose : Allocates initializes state memory 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Description : Stores pointer to filter status struct in *st. This 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * pointer has to be passed to Bgn_scd in each call. 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Returns : 0 on success 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Bgn_scd_init(Bgn_scdState **st); 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Function : Bgn_scd_reset 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Purpose : Resets state memory 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Returns : 0 on success 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Bgn_scd_reset(Bgn_scdState *st); 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Function : Bgn_scd_exit 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Purpose : The memory used for state memory is freed 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Description : Stores NULL in *s 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Returns : void 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber void Bgn_scd_exit(Bgn_scdState **st); 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Function : Bgn_scd 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Purpose : Charaterice synthesis speech and detect background noise 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Returns : background noise decision; 0 = bgn, 1 = no bgn 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Bgn_scd(Bgn_scdState *st, /* i : State variables for bgn SCD */ 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 ltpGainHist[], /* i : LTP gain history */ 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 speech[], /* o : synthesis speech frame */ 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *voicedHangover,/* o : # of frames after last voiced frame */ 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ); 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif /* _BGNSCD_H_ */ 160