| /* ------------------------------------------------------------------ |
| * 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: /audio/gsm_amr/c/include/lsp.h |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: Placed header file in the proper template format. Added |
| parameter pOverflow for the basic math ops. |
| |
| Description: Replaced "int" and/or "char" with OSCL defined types. |
| |
| Description: Moved _cplusplus #ifdef after Include section. |
| |
| Who: Date: |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| This file contains all the constant definitions and prototype definitions |
| needed by the lsp.c |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| /*---------------------------------------------------------------------------- |
| ; CONTINUE ONLY IF NOT ALREADY DEFINED |
| ----------------------------------------------------------------------------*/ |
| #ifndef lsp_h |
| #define lsp_h "$Id $" |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include "typedef.h" |
| #include "q_plsf.h" |
| #include "mode.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 |
| ----------------------------------------------------------------------------*/ |
| typedef struct |
| { |
| |
| /* Past LSPs */ |
| Word16 lsp_old[M]; |
| Word16 lsp_old_q[M]; |
| |
| /* Quantization state */ |
| Q_plsfState *qSt; |
| |
| } lspState; |
| |
| /*---------------------------------------------------------------------------- |
| ; GLOBAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| /* |
| ************************************************************************** |
| * |
| * Function : lsp_init |
| * Purpose : Allocates memory and initializes state variables |
| * Description : Stores pointer to filter status struct in *st. This |
| * pointer has to be passed to lsp in each call. |
| * Returns : 0 on success |
| * |
| ************************************************************************** |
| */ |
| Word16 lsp_init(lspState **st); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : lsp_reset |
| * Purpose : Resets state memory |
| * Returns : 0 on success |
| * |
| ************************************************************************** |
| */ |
| Word16 lsp_reset(lspState *st); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : lsp_exit |
| * Purpose : The memory used for state memory is freed |
| * Description : Stores NULL in *st |
| * |
| ************************************************************************** |
| */ |
| void lsp_exit(lspState **st); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : lsp |
| * Purpose : Conversion from LP coefficients to LSPs. |
| * Quantization of LSPs. |
| * Description : Generates 2 sets of LSPs from 2 sets of |
| * LP coefficients for mode 12.2. For the other |
| * modes 1 set of LSPs is generated from 1 set of |
| * LP coefficients. These LSPs are quantized with |
| * Matrix/Vector quantization (depending on the mode) |
| * and interpolated for the subframes not yet having |
| * their own LSPs. |
| * |
| ************************************************************************** |
| */ |
| void lsp(lspState *st, /* i/o : State struct */ |
| enum Mode req_mode, /* i : requested coder mode */ |
| enum Mode used_mode,/* i : used coder mode */ |
| Word16 az[], /* i/o : interpolated LP parameters Q12 */ |
| Word16 azQ[], /* o : quantization interpol. LP parameters Q12*/ |
| Word16 lsp_new[], /* o : new lsp vector */ |
| Word16 **anap, /* o : analysis parameters */ |
| Flag *pOverflow /* o : Flag set when overflow occurs */ |
| ); |
| |
| /*---------------------------------------------------------------------------- |
| ; END |
| ----------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _LSP_H_ */ |
| |
| |
