| /* ------------------------------------------------------------------ |
| * 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. |
| ****************************************************************************************/ |
| /* |
| ******************************************************************************** |
| * |
| * GSM AMR-NB speech codec R98 Version 7.5.0 March 2, 2001 |
| * R99 Version 3.2.0 |
| * REL-4 Version 4.0.0 |
| * |
| ******************************************************************************** |
| * |
| * File : calc_cor.h |
| * Purpose : Calculate all correlations for prior the OL LTP |
| * |
| ******************************************************************************** |
| */ |
| #ifndef calc_cor_h |
| #define calc_cor_h "$Id $" |
| |
| /* |
| ******************************************************************************** |
| * INCLUDE FILES |
| ******************************************************************************** |
| */ |
| #include "typedef.h" |
| |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| /* |
| ******************************************************************************** |
| * DECLARATION OF PROTOTYPES |
| ******************************************************************************** |
| */ |
| /************************************************************************* |
| * |
| * FUNCTION: comp_corr |
| * |
| * PURPOSE: Calculate all correlations of scal_sig[] in a given delay |
| * range. |
| * |
| * DESCRIPTION: |
| * The correlation is given by |
| * cor[t] = <scal_sig[n], scal_sig[n-t]>, t=lag_min,...,lag_max |
| * The functions outputs all correlations in the given range |
| * |
| *************************************************************************/ |
| void comp_corr(Word16 scal_sig[], /* i : scaled signal. */ |
| Word16 L_frame, /* i : length of frame to compute pitch */ |
| Word16 lag_max, /* i : maximum lag */ |
| Word16 lag_min, /* i : minimum lag */ |
| Word32 corr[] /* o : correlation of selected lag */ |
| ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
