FreeCalypso > hg > gsm-codec-lib
view libtwamr/c_g_aver.h @ 418:93d6c6960a46
libtwamr: integrate cod_amr.c
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Tue, 07 May 2024 03:50:25 +0000 |
parents | dc3b7caa59c4 |
children |
line wrap: on
line source
/* ******************************************************************************** * * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 * R99 Version 3.3.0 * REL-4 Version 4.1.0 * ******************************************************************************** * * File : c_g_aver.h * Purpose : Background noise source charateristic detector (SCD) * ******************************************************************************** */ #ifndef c_g_aver_h #define c_g_aver_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "tw_amr.h" #include "typedef.h" #include "cnst.h" /* ******************************************************************************** * LOCAL VARIABLES AND TABLES ******************************************************************************** */ #define L_CBGAINHIST 7 /* ******************************************************************************** * DEFINITION OF DATA TYPES ******************************************************************************** */ typedef struct{ /* history vector of past synthesis speech energy */ Word16 cbGainHistory[L_CBGAINHIST]; /* state flags */ Word16 hangVar; /* counter; */ Word16 hangCount; /* counter; */ } Cb_gain_averageState; /* ******************************************************************************** * DECLARATION OF PROTOTYPES ******************************************************************************** */ /* ************************************************************************** * * Function : Cb_gain_average_reset * Purpose : Resets state memory * Returns : 0 on success * ************************************************************************** */ void Cb_gain_average_reset (Cb_gain_averageState *st); /* ************************************************************************** * * Function : Cb_gain_average * Purpose : Charaterice synthesis speech and detect background noise * Returns : background noise decision; 0 = bgn, 1 = no bgn * ************************************************************************** */ Word16 Cb_gain_average ( Cb_gain_averageState *st, /* i/o : State variables for CB gain avergeing */ enum Mode mode, /* i : AMR mode */ Word16 gain_code, /* i : CB gain Q1 */ Word16 lsp[], /* i : The LSP for the current frame Q15 */ Word16 lspAver[], /* i : The average of LSP for 8 frames Q15 */ Word16 bfi, /* i : bad frame indication flag */ Word16 prev_bf, /* i : previous bad frame indication flag */ Word16 pdfi, /* i : potential degraded bad frame ind flag */ Word16 prev_pdf, /* i : prev pot. degraded bad frame ind flag */ Word16 inBackgroundNoise, /* i : background noise decision */ Word16 voicedHangover /* i : # of frames after last voiced frame */ ); #endif