1/* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
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
13 * express or implied.
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
17 */
18/*
19------------------------------------------------------------------------------
20   PacketVideo Corp.
21   MP3 Decoder Library
22
23   Pathname: ./cpp/include/pv_mp3dec_fxd_op_c_equivalent.h
24
25     Date: 12/06/2005
26
27------------------------------------------------------------------------------
28 REVISION HISTORY
29
30 Description:
31------------------------------------------------------------------------------
32 INCLUDE DESCRIPTION
33
34------------------------------------------------------------------------------
35*/
36
37#ifndef PV_MP3DEC_FXD_OP_C_EQUIVALENT
38#define PV_MP3DEC_FXD_OP_C_EQUIVALENT
39
40
41#ifdef __cplusplus
42extern "C"
43{
44#endif
45
46#include "pvmp3_audio_type_defs.h"
47#define Qfmt_31(a)   (Int32)((float)a*0x7FFFFFFF)
48
49#define Qfmt15(x)   (Int16)(x*((Int32)1<<15) + (x>=0?0.5F:-0.5F))
50
51
52
53    __inline int32 pv_abs(int32 a)
54    {
55        int32 b = (a < 0) ? -a : a;
56        return b;
57    }
58
59
60
61
62    __inline Int32 fxp_mul32_Q30(const Int32 a, const Int32 b)
63    {
64        return (Int32)(((int64)(a) * b) >> 30);
65    }
66
67    __inline Int32 fxp_mac32_Q30(const Int32 a, const Int32 b, Int32 L_add)
68    {
69        return (L_add + (Int32)(((int64)(a) * b) >> 30));
70    }
71
72    __inline Int32 fxp_mul32_Q32(const Int32 a, const Int32 b)
73    {
74        return (Int32)(((int64)(a) * b) >> 32);
75    }
76
77
78    __inline Int32 fxp_mul32_Q28(const Int32 a, const Int32 b)
79    {
80        return (Int32)(((int64)(a) * b) >> 28);
81    }
82
83    __inline Int32 fxp_mul32_Q27(const Int32 a, const Int32 b)
84    {
85        return (Int32)(((int64)(a) * b) >> 27);
86    }
87
88    __inline Int32 fxp_mul32_Q26(const Int32 a, const Int32 b)
89    {
90        return (Int32)(((int64)(a) * b) >> 26);
91    }
92
93
94    __inline Int32 fxp_mac32_Q32(Int32 L_add, const Int32 a, const Int32 b)
95    {
96        return (L_add + (Int32)(((int64)(a) * b) >> 32));
97    }
98
99    __inline Int32 fxp_msb32_Q32(Int32 L_sub, const Int32 a, const Int32 b)
100    {
101        return (L_sub - ((Int32)(((int64)(a) * b) >> 32)));
102    }
103
104
105    __inline Int32 fxp_mul32_Q29(const Int32 a, const Int32 b)
106    {
107        return (Int32)(((int64)(a) * b) >> 29);
108    }
109
110
111
112
113
114
115#ifdef __cplusplus
116}
117#endif
118
119
120#endif   /*  PV_MP3DEC_FXD_OP_C_EQUIVALENT  */
121
122
123
124