p_med_o.h revision e2e838afcf03e603a41a0455846eaf9614537c16 
1/*
2 ** Copyright 2003-2010, VisualOn, Inc.
3 **
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
7 **
8 **     http://www.apache.org/licenses/LICENSE-2.0
9 **
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 express or implied.
13 ** See the License for the specific language governing permissions and
14 ** limitations under the License.
15 */
16
17/*--------------------------------------------------------------------------*
18 *                         P_MED_O.H                                        *
19 *--------------------------------------------------------------------------*
20 *       Median open-loop lag search				            *
21 *--------------------------------------------------------------------------*/
22
23#ifndef __P_MED_O_H__
24#define __P_MED_O_H__
25
26Word16 Pitch_med_ol(                       /* output: open loop pitch lag                        */
27		Word16 wsp[],                         /* input : signal used to compute the open loop pitch */
28		/* wsp[-pit_max] to wsp[-1] should be known   */
29		Word16 L_min,                         /* input : minimum pitch lag                          */
30		Word16 L_max,                         /* input : maximum pitch lag                          */
31		Word16 L_frame,                       /* input : length of frame to compute pitch           */
32		Word16 L_0,                           /* input : old_ open-loop pitch                       */
33		Word16 * gain,                        /* output: normalize correlation of hp_wsp for the Lag */
34		Word16 * hp_wsp_mem,                  /* i:o   : memory of the hypass filter for hp_wsp[] (lg=9)   */
35		Word16 * old_hp_wsp,                  /* i:o   : hypass wsp[]                               */
36		Word16 wght_flg                       /* input : is weighting function used                 */
37		);
38
39Word16 Med_olag(                           /* output : median of  5 previous open-loop lags       */
40		Word16 prev_ol_lag,                   /* input  : previous open-loop lag                     */
41		Word16 old_ol_lag[5]
42	       );
43
44void Hp_wsp(
45		Word16 wsp[],                         /* i   : wsp[]  signal       */
46		Word16 hp_wsp[],                      /* o   : hypass wsp[]        */
47		Word16 lg,                            /* i   : lenght of signal    */
48		Word16 mem[]                          /* i/o : filter memory [9]   */
49	   );
50
51#endif  //__P_MED_O_H__
52
53