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Diffstat (limited to 'media/libstagefright/codecs/amrnb/enc/src/calc_cor.h')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/enc/src/calc_cor.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrnb/enc/src/calc_cor.h b/media/libstagefright/codecs/amrnb/enc/src/calc_cor.h new file mode 100644 index 0000000..d4a694b --- /dev/null +++ b/media/libstagefright/codecs/amrnb/enc/src/calc_cor.h @@ -0,0 +1,87 @@ +/* ------------------------------------------------------------------ + * 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 |