diff options
Diffstat (limited to 'opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/a_refl.h')
-rw-r--r-- | opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/a_refl.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/a_refl.h b/opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/a_refl.h new file mode 100644 index 0000000..d16e572 --- /dev/null +++ b/opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/a_refl.h @@ -0,0 +1,115 @@ +/* ------------------------------------------------------------------ + * Copyright (C) 1998-2009 PacketVideo + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either + * express or implied. + * See the License for the specific language governing permissions + * and limitations under the License. + * ------------------------------------------------------------------- + */ +/**************************************************************************************** +Portions of this file are derived from the following 3GPP standard: + + 3GPP TS 26.073 + ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec + Available from http://www.3gpp.org + +(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) +Permission to distribute, modify and use this file under the standard license +terms listed above has been obtained from the copyright holder. +****************************************************************************************/ +/* +------------------------------------------------------------------------------ + + + + Filename: a_refl.h + +------------------------------------------------------------------------------ + INCLUDE DESCRIPTION + + File : a_refl.h + Purpose : Convert from direct form coefficients to + reflection coefficients + +------------------------------------------------------------------------------ +*/ + +#ifndef A_REFL_H +#define A_REFL_H +#define a_refl_h "$Id $" + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "typedef.h" + +/*--------------------------------------------------------------------------*/ +#ifdef __cplusplus +extern "C" +{ +#endif + + /*---------------------------------------------------------------------------- + ; MACROS + ; Define module specific macros here + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; DEFINES + ; Include all pre-processor statements here. + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; EXTERNAL VARIABLES REFERENCES + ; Declare variables used in this module but defined elsewhere + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; SIMPLE TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; ENUMERATED TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; STRUCTURES TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; GLOBAL FUNCTION DEFINITIONS + ; Function Prototype declaration + ----------------------------------------------------------------------------*/ + /* + * FUNCTION: A_Refl() + * PURPOSE: Convert from direct form coefficients to reflection coefficients + * DESCRIPTION: + * Directform coeffs in Q12 are converted to + * reflection coefficients Q15 + */ + void A_Refl( + Word16 a[], /* i : Directform coefficients */ + Word16 refl[], /* o : Reflection coefficients */ + Flag *pOverflow + ); + + /*---------------------------------------------------------------------------- + ; END + ----------------------------------------------------------------------------*/ +#ifdef __cplusplus +} +#endif + +#endif /* _A_REFL_H_ */ + + + |