diff options
Diffstat (limited to 'media/libstagefright/codecs/amrnb/enc/src/pitch_fr.h')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/enc/src/pitch_fr.h | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrnb/enc/src/pitch_fr.h b/media/libstagefright/codecs/amrnb/enc/src/pitch_fr.h new file mode 100644 index 0000000..5e87cc9 --- /dev/null +++ b/media/libstagefright/codecs/amrnb/enc/src/pitch_fr.h @@ -0,0 +1,148 @@ +/* ------------------------------------------------------------------ + * 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/src/include/pitch_fr.h + + Date: 02/04/2002 + +------------------------------------------------------------------------------ + REVISION HISTORY + + Description: Replaced "int" and/or "char" with OSCL defined types. + + Description: Moved _cplusplus #ifdef after Include section. + + Description: + +------------------------------------------------------------------------------ + INCLUDE DESCRIPTION + + File : pitch_fr.h + Purpose : Find the pitch period with 1/3 or 1/6 subsample + : resolution (closed loop). + +------------------------------------------------------------------------------ +*/ + +#ifndef _PITCH_FR_H_ +#define _PITCH_FR_H_ +#define pitch_fr_h "$Id $" + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "typedef.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 + { + Word16 T0_prev_subframe; /* integer pitch lag of previous sub-frame */ + } Pitch_frState; + + /*---------------------------------------------------------------------------- + ; GLOBAL FUNCTION DEFINITIONS + ; [List function prototypes here] + ----------------------------------------------------------------------------*/ + + Word16 Pitch_fr_init(Pitch_frState **st); + /* initialize one instance of the pre processing state. + Stores pointer to filter status struct in *st. This pointer has to + be passed to Pitch_fr in each call. + returns 0 on success + */ + + Word16 Pitch_fr_reset(Pitch_frState *st); + /* reset of pre processing state (i.e. set state memory to zero) + returns 0 on success + */ + + void Pitch_fr_exit(Pitch_frState **st); + /* de-initialize pre processing state (i.e. free status struct) + stores NULL in *st + */ + + Word16 Pitch_fr( /* o : pitch period (integer) */ + Pitch_frState *st, /* i/o : State struct */ + enum Mode mode, /* i : codec mode */ + Word16 T_op[], /* i : open loop pitch lags */ + Word16 exc[], /* i : excitation buffer */ + Word16 xn[], /* i : target vector */ + Word16 h[], /* i : impulse response of synthesis and + weighting filters */ + Word16 L_subfr, /* i : Length of subframe */ + Word16 i_subfr, /* i : subframe offset */ + Word16 *pit_frac, /* o : pitch period (fractional) */ + Word16 *resu3, /* o : subsample resolution 1/3 (=1) or 1/6 (=0) */ + Word16 *ana_index, /* o : index of encoding */ + Flag *pOverflow + ); + +#ifdef __cplusplus +} +#endif + +#endif /* _PITCH_FR_H_ */ + + |