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   Filename: pvmp3_decode_header.h
24
25   Date: 09/21/2007
26
27------------------------------------------------------------------------------
28 REVISION HISTORY
29
30 Description:
31
32------------------------------------------------------------------------------
33 INCLUDE DESCRIPTION
34
35------------------------------------------------------------------------------
36*/
37
38/*----------------------------------------------------------------------------
39; CONTINUE ONLY IF NOT ALREADY DEFINED
40----------------------------------------------------------------------------*/
41#ifndef PVMP3_POLYPHASE_FILTER_WINDOW_H
42#define PVMP3_POLYPHASE_FILTER_WINDOW_H
43
44/*----------------------------------------------------------------------------
45; INCLUDES
46----------------------------------------------------------------------------*/
47
48#include "pvmp3_audio_type_defs.h"
49#include "s_tmp3dec_chan.h"
50
51/*----------------------------------------------------------------------------
52; MACROS
53; Define module specific macros here
54----------------------------------------------------------------------------*/
55
56/*----------------------------------------------------------------------------
57; DEFINES
58; Include all pre-processor statements here.
59----------------------------------------------------------------------------*/
60#define MAX_16BITS_INT  0x7FFF
61
62/*----------------------------------------------------------------------------
63; EXTERNAL VARIABLES REFERENCES
64; Declare variables used in this module but defined elsewhere
65----------------------------------------------------------------------------*/
66
67/*----------------------------------------------------------------------------
68; SIMPLE TYPEDEF'S
69----------------------------------------------------------------------------*/
70
71/*----------------------------------------------------------------------------
72; ENUMERATED TYPEDEF'S
73----------------------------------------------------------------------------*/
74
75/*----------------------------------------------------------------------------
76; STRUCTURES TYPEDEF'S
77----------------------------------------------------------------------------*/
78
79/*----------------------------------------------------------------------------
80; GLOBAL FUNCTION DEFINITIONS
81; Function Prototype declaration
82----------------------------------------------------------------------------*/
83
84#ifdef __cplusplus
85extern "C"
86{
87#endif
88
89
90#if (defined(PV_ARM_V5)||defined(PV_ARM_V4))
91
92
93    __inline int16 saturate16(int32 sample)
94    {
95        int32 a;
96        int32 b = 31;
97        __asm
98        {
99            mov   a, sample, asr#15
100            teq a, sample, asr b
101            eorne sample, MAX_16BITS_INT, sample, asr#31
102        }
103        return sample ;
104    }
105
106#else
107
108    inline int16 saturate16(int32 sample)
109    {
110
111        if ((sample >> 15) ^(sample >> 31))
112        {
113            sample = MAX_16BITS_INT ^(sample >> 31);
114        }
115        return sample;
116
117    }
118#endif
119
120
121    void pvmp3_polyphase_filter_window(int32 *synth_buffer,
122                                       int16 *outPcm,
123                                       int32 numChannels);
124
125
126#ifdef __cplusplus
127}
128#endif
129
130/*----------------------------------------------------------------------------
131; END
132----------------------------------------------------------------------------*/
133#endif
134
135
136
137
138
139