1/*---------------------------------------------------------------------------*
2 *  fronttyp.h  *
3 *                                                                           *
4 *  Copyright 2007, 2008 Nuance Communciations, Inc.                               *
5 *                                                                           *
6 *  Licensed under the Apache License, Version 2.0 (the 'License');          *
7 *  you may not use this file except in compliance with the License.         *
8 *                                                                           *
9 *  You may obtain a copy of the License at                                  *
10 *      http://www.apache.org/licenses/LICENSE-2.0                           *
11 *                                                                           *
12 *  Unless required by applicable law or agreed to in writing, software      *
13 *  distributed under the License is distributed on an 'AS IS' BASIS,        *
14 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
15 *  See the License for the specific language governing permissions and      *
16 *  limitations under the License.                                           *
17 *                                                                           *
18 *---------------------------------------------------------------------------*/
19
20#ifndef _h_fronttyp_
21#define _h_fronttyp_
22
23typedef long     bigdata;
24typedef int     coefdata;
25typedef short     samdata;
26typedef int     fftdata; /* TODO: Swap in fixed point datatype when working */
27typedef int     cepdata;
28
29/******************************************************************************
30**  Fixed point processing macros. These are defined in non-fixed point build also.
31*******************************************************************************/
32
33#define COEFDATA_SIZE   32 /* coefficients */
34#define SAMDATA_SIZE    16 /* samples */
35#define FFTDATA_SIZE    32 /* fft internal data */
36#define CEPDATA_SIZE    32 /* cepstrum internal data */
37
38#define HALF_COEFDATA_SIZE      (COEFDATA_SIZE >> 1)
39#define HALF_SAMDATA_SIZE       (SAMDATA_SIZE >> 1)
40#define HALF_FFTDATA_SIZE       (FFTDATA_SIZE >> 1)
41#define HALF_CEPDATA_SIZE       (CEPDATA_SIZE >> 1)
42#define QUART_CEPDATA_SIZE      (CEPDATA_SIZE >> 2)
43#define QUART_FFTDATA_SIZE      (CEPDATA_SIZE >> 2)
44
45/*  scaling in terms of shifts */
46#define COSINE_TABLE_SHIFT HALF_CEPDATA_SIZE   /* minimum 5 */
47#define RAMP_SHIFT  6
48#define HALF_RAMP_SHIFT  (RAMP_SHIFT >> 1)
49#define COEFDATA_SHIFT  8
50#define HALF_COEFDATA_SHIFT (COEFDATA_SHIFT >> 1)
51#define WAVE_SHIFT  0
52#define BYTERANGE_SHIFT  1
53
54#endif
55