FreeCalypso > hg > gsm-codec-lib
view libtwamr/d_gain_p.c @ 418:93d6c6960a46
libtwamr: integrate cod_amr.c
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 07 May 2024 03:50:25 +0000 |
parents | e18452a4fbac |
children |
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/* ******************************************************************************** * * 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 : d_gain_p.c * ******************************************************************************** */ /* ******************************************************************************** * MODULE INCLUDE FILE AND VERSION ID ******************************************************************************** */ #include "namespace.h" #include "d_gain_p.h" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "tw_amr.h" #include "typedef.h" #include "basic_op.h" #include "oper_32b.h" #include "no_count.h" #include "cnst.h" #include "gains_tab.h" /* ******************************************************************************** * PUBLIC PROGRAM CODE ******************************************************************************** */ /* ************************************************************************** * * Function : d_gain_pitch * Purpose : Decodes the pitch gain using the received index. * output is in Q14 * ************************************************************************** */ Word16 d_gain_pitch ( /* return value: gain (Q14) */ enum Mode mode, /* i : AMR mode */ Word16 index /* i : index of quantization */ ) { Word16 gain; test (); if (sub(mode, MR122) == 0) { /* clear 2 LSBits */ gain = shl (shr (qua_gain_pitch[index], 2), 2); move16 (); } else { gain = qua_gain_pitch[index]; move16 (); } return gain; }