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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 /*--------------------------------------------------------------------------*
19  *                         CNST.H                                           *
20  *--------------------------------------------------------------------------*
21  *       Codec constant parameters (coder and decoder)                      *
22  *--------------------------------------------------------------------------*/
23 
24 #ifndef __CNST_H__
25 #define __CNST_H__
26 
27 #define L_FRAME16k   320                   /* Frame size at 16kHz                        */
28 #define L_FRAME      256                   /* Frame size                                 */
29 #define L_SUBFR16k   80                    /* Subframe size at 16kHz                     */
30 
31 #define L_SUBFR      64                    /* Subframe size                              */
32 #define NB_SUBFR     4                     /* Number of subframe per frame               */
33 
34 #define L_NEXT       64                    /* Overhead in LP analysis                    */
35 #define L_WINDOW     384                   /* window size in LP analysis                 */
36 #define L_TOTAL      384                   /* Total size of speech buffer.               */
37 #define M            16                    /* Order of LP filter                         */
38 #define M16k         20
39 
40 #define L_FILT16k    15                    /* Delay of down-sampling filter              */
41 #define L_FILT       12                    /* Delay of up-sampling filter                */
42 
43 #define GP_CLIP      15565                 /* Pitch gain clipping = 0.95 Q14             */
44 #define PIT_SHARP    27853                 /* pitch sharpening factor = 0.85 Q15         */
45 
46 #define PIT_MIN      34                    /* Minimum pitch lag with resolution 1/4      */
47 #define PIT_FR2      128                   /* Minimum pitch lag with resolution 1/2      */
48 #define PIT_FR1_9b   160                   /* Minimum pitch lag with resolution 1        */
49 #define PIT_FR1_8b   92                    /* Minimum pitch lag with resolution 1        */
50 #define PIT_MAX      231                   /* Maximum pitch lag                          */
51 #define L_INTERPOL   (16+1)                /* Length of filter for interpolation         */
52 
53 #define OPL_DECIM    2                     /* Decimation in open-loop pitch analysis     */
54 
55 #define PREEMPH_FAC  22282                 /* preemphasis factor (0.68 in Q15)           */
56 #define GAMMA1       30147                 /* Weighting factor (numerator) (0.92 in Q15) */
57 #define TILT_FAC     22282                 /* tilt factor (denominator) (0.68 in Q15)    */
58 
59 #define Q_MAX        8                     /* scaling max for signal (see syn_filt_32)   */
60 
61 #define RANDOM_INITSEED  21845             /* own random init value                      */
62 
63 #define L_MEANBUF        3
64 #define ONE_PER_MEANBUF 10923
65 
66 #define MODE_7k       0
67 #define MODE_9k       1
68 #define MODE_12k      2
69 #define MODE_14k      3
70 #define MODE_16k      4
71 #define MODE_18k      5
72 #define MODE_20k      6
73 #define MODE_23k      7
74 #define MODE_24k      8
75 #define MRDTX         9
76 #define NUM_OF_MODES  10                   /* see bits.h for bits definition             */
77 
78 #define EHF_MASK (Word16)0x0008            /* homing frame pattern                       */
79 
80 #endif //__CNST_H__
81 
82