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/agc.h 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 12/07/2001 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Removed unneeded sections of the standard template. 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Updated function prototype for agc() and agc2() to match new 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber interface 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Changed paramter name from "overflow" to "pOverflow" for 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber functions agc() and agc2() 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Moved _cplusplus #ifdef after Include section. 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INCLUDE DESCRIPTION 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber File : agc.h 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Purpose : Scales the postfilter output on a subframe basis 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber : by automatic control of the subframe gain. 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifndef _AGC_H_ 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define _AGC_H_ 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*--------------------------------------------------------------------------*/ 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberextern "C" 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; MACROS 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [Define module specific macros here] 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; DEFINES 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [Include all pre-processor statements here.] 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; EXTERNAL VARIABLES REFERENCES 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [Declare variables used in this module but defined elsewhere] 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; SIMPLE TYPEDEF'S 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; ENUMERATED TYPEDEF'S 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; STRUCTURES TYPEDEF'S 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber typedef struct 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 past_gain; 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } agcState; 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; GLOBAL FUNCTION DEFINITIONS 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; [List function prototypes here] 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Function : agc_reset 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Purpose : Reset of agc (i.e. set state memory to 1.0) 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Returns : 0 on success 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 agc_reset(agcState *st); 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Function : agc 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Purpose : Scales the postfilter output on a subframe basis 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Description : sig_out[n] = sig_out[n] * gain[n]; 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; where gain[n] is the gain at the nth sample given by 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; gain[n] = agc_fac * gain[n-1] + (1 - agc_fac) g_in/g_out 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; g_in/g_out is the square root of the ratio of energy at 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; the input and output of the postfilter. 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber void agc( 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber agcState *st, /* i/o : agc state */ 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *sig_in, /* i : postfilter input signal, (l_trm) */ 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *sig_out, /* i/o : postfilter output signal, (l_trm) */ 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 agc_fac, /* i : AGC factor */ 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 l_trm, /* i : subframe size */ 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow /* i : overflow flag */ 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ); 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Function: agc2 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Purpose: Scales the excitation on a subframe basis 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber void agc2( 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *sig_in, /* i : postfilter input signal */ 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *sig_out, /* i/o : postfilter output signal */ 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 l_trm, /* i : subframe size */ 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow /* i : overflow flag */ 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ); 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif /* _AGC_H_ */ 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 164