1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
18 /****************************************************************************************
19 Portions of this file are derived from the following 3GPP standard:
22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
23 Available from http://www.3gpp.org
25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
26 Permission to distribute, modify and use this file under the standard license
27 terms listed above has been obtained from the copyright holder.
28 ****************************************************************************************/
33 ------------------------------------------------------------------------------
37 Purpose : Compute the open loop pitch lag with weighting.
39 ------------------------------------------------------------------------------
45 /*----------------------------------------------------------------------------
47 ----------------------------------------------------------------------------*/
52 /*--------------------------------------------------------------------------*/
58 /*----------------------------------------------------------------------------
60 ; [Define module specific macros here]
61 ----------------------------------------------------------------------------*/
63 /*----------------------------------------------------------------------------
65 ; [Include all pre-processor statements here.]
66 ----------------------------------------------------------------------------*/
68 /*----------------------------------------------------------------------------
69 ; EXTERNAL VARIABLES REFERENCES
70 ; [Declare variables used in this module but defined elsewhere]
71 ----------------------------------------------------------------------------*/
72 extern const Word16 corrweight[];
74 /*----------------------------------------------------------------------------
76 ----------------------------------------------------------------------------*/
78 /*----------------------------------------------------------------------------
79 ; ENUMERATED TYPEDEF'S
80 ----------------------------------------------------------------------------*/
82 /*----------------------------------------------------------------------------
83 ; STRUCTURES TYPEDEF'S
84 ----------------------------------------------------------------------------*/
94 /*----------------------------------------------------------------------------
95 ; GLOBAL FUNCTION DEFINITIONS
96 ; [List function prototypes here]
97 ----------------------------------------------------------------------------*/
98 Word16 p_ol_wgh_init(pitchOLWghtState **st);
99 /* initialize one instance of the pre processing state.
100 Stores pointer to filter status struct in *st. This pointer has to
101 be passed to p_ol_wgh in each call.
105 Word16 p_ol_wgh_reset(pitchOLWghtState *st);
106 /* reset of pre processing state (i.e. set state memory to zero)
110 void p_ol_wgh_exit(pitchOLWghtState **st);
111 /* de-initialize pre processing state (i.e. free status struct)
115 Word16 Pitch_ol_wgh( /* o : open loop pitch lag */
116 pitchOLWghtState *st, /* i/o : State struct */
117 vadState *vadSt, /* i/o : VAD state struct */
118 Word16 signal[], /* i : signal used to compute the open loop pitch */
119 /* signal[-pit_max] to signal[-1] should be known */
120 Word16 pit_min, /* i : minimum pitch lag */
121 Word16 pit_max, /* i : maximum pitch lag */
122 Word16 L_frame, /* i : length of frame to compute pitch */
123 Word16 old_lags[], /* i : history with old stored Cl lags */
124 Word16 ol_gain_flg[], /* i : OL gain flag */
125 Word16 idx, /* i : index */
126 Flag dtx, /* i : dtx flag; use dtx=1, do not use dtx=0 */
127 Flag *pOverflow /* o : overflow flag */
134 #endif /* _P_OL_WGH_H_ */