1 /*
2 Copyright (c) 2005-2009, The Musepack Development Team
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are
7 met:
8
9 * Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11
12 * Redistributions in binary form must reproduce the above
13 copyright notice, this list of conditions and the following
14 disclaimer in the documentation and/or other materials provided
15 with the distribution.
16
17 * Neither the name of the The Musepack Development Team nor the
18 names of its contributors may be used to endorse or promote
19 products derived from this software without specific prior
20 written permission.
21
22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34 /// \file mpcdec_math.h
35 /// Libmpcdec internal math routines.
36 #ifndef _MPCDEC_MATH_H_
37 #define _MPCDEC_MATH_H_
38 #ifdef WIN32
39 #pragma once
40 #endif
41
42 #include <mpc/mpc_types.h>
43
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47
48 #ifdef MPC_FIXED_POINT
49
50 #ifdef _WIN32_WCE
51 #include <cmnintrin.h>
52 #define MPC_HAVE_MULHIGH
53 #endif
54
55 //in fixedpoint mode, results in decode output buffer are in -MPC_FIXED_POINT_SCALE ... MPC_FIXED_POINT_SCALE range
56
57 typedef mpc_int64_t MPC_SAMPLE_FORMAT_MULTIPLY;
58
59 #define MAKE_MPC_SAMPLE(X) (MPC_SAMPLE_FORMAT)((double)(X) * (double)(((mpc_int64_t)1)<<MPC_FIXED_POINT_FRACTPART))
60 #define MAKE_MPC_SAMPLE_EX(X,Y) (MPC_SAMPLE_FORMAT)((double)(X) * (double)(((mpc_int64_t)1)<<(Y)))
61
62 #define MPC_MULTIPLY_NOTRUNCATE(X,Y) \
63 (((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> MPC_FIXED_POINT_FRACTPART)
64
65 #define MPC_MULTIPLY_EX_NOTRUNCATE(X,Y,Z) \
66 (((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> (Z))
67
68 #ifdef _DEBUG
MPC_MULTIPLY(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2)69 static mpc_inline MPC_SAMPLE_FORMAT MPC_MULTIPLY(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2)
70 {
71 MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_NOTRUNCATE(item1,item2);
72 assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(MPC_SAMPLE_FORMAT)temp);
73 return (MPC_SAMPLE_FORMAT)temp;
74 }
75
MPC_MULTIPLY_EX(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2,unsigned shift)76 static mpc_inline MPC_SAMPLE_FORMAT MPC_MULTIPLY_EX(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2,unsigned shift)
77 {
78 MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_EX_NOTRUNCATE(item1,item2,shift);
79 assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(MPC_SAMPLE_FORMAT)temp);
80 return (MPC_SAMPLE_FORMAT)temp;
81 }
82
83 #else
84
85 #define MPC_MULTIPLY(X,Y) ((MPC_SAMPLE_FORMAT)MPC_MULTIPLY_NOTRUNCATE(X,Y))
86 #define MPC_MULTIPLY_EX(X,Y,Z) ((MPC_SAMPLE_FORMAT)MPC_MULTIPLY_EX_NOTRUNCATE(X,Y,Z))
87
88 #endif
89
90 #ifdef MPC_HAVE_MULHIGH
91 #define MPC_MULTIPLY_FRACT(X,Y) _MulHigh(X,Y)
92 #else
93 #define MPC_MULTIPLY_FRACT(X,Y) MPC_MULTIPLY_EX(X,Y,32)
94 #endif
95
96 #define MPC_MAKE_FRACT_CONST(X) (MPC_SAMPLE_FORMAT)((X) * (double)(((mpc_int64_t)1)<<32) )
97 #define MPC_MULTIPLY_FRACT_CONST(X,Y) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST(Y))
98 #define MPC_MULTIPLY_FRACT_CONST_FIX(X,Y,Z) ( MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y / (1<<(Z)) )) << (Z) )
99 #define MPC_MULTIPLY_FRACT_CONST_SHR(X,Y,Z) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y / (1<<(Z)) ))
100
101 #define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))
102 #define MPC_SCALE_CONST(X,Y,Z) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z))
103 #define MPC_SCALE_CONST_SHL(X,Y,Z,S) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z)-(S))
104 #define MPC_SCALE_CONST_SHR(X,Y,Z,S) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z)+(S))
105 #define MPC_SHR(X,Y) ((X)>>(Y))
106 #define MPC_SHL(X,Y) ((X)<<(Y))
107
108 #else
109
110 //in floating-point mode, decoded samples are in -1...1 range
111
112 #define MAKE_MPC_SAMPLE(X) ((MPC_SAMPLE_FORMAT)(X))
113 #define MAKE_MPC_SAMPLE_EX(X,Y) ((MPC_SAMPLE_FORMAT)(X))
114
115 #define MPC_MULTIPLY_FRACT(X,Y) ((X)*(Y))
116 #define MPC_MAKE_FRACT_CONST(X) (X)
117 #define MPC_MULTIPLY_FRACT_CONST(X,Y) MPC_MULTPLY_FRACT(X,MPC_MAKE_FRACT_CONST(Y))
118 #define MPC_MULTIPLY_FRACT_CONST_SHR(X,Y,Z) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y ))
119 #define MPC_MULTIPLY_FRACT_CONST_FIX(X,Y,Z) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y ))
120
121 #define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))
122 #define MPC_MULTIPLY(X,Y) ((X)*(Y))
123 #define MPC_MULTIPLY_EX(X,Y,Z) ((X)*(Y))
124 #define MPC_SCALE_CONST(X,Y,Z) ((X)*(Y))
125 #define MPC_SCALE_CONST_SHL(X,Y,Z,S) ((X)*(Y))
126 #define MPC_SCALE_CONST_SHR(X,Y,Z,S) ((X)*(Y))
127 #define MPC_SHR(X,Y) (X)
128 #define MPC_SHL(X,Y) (X)
129
130 #endif
131
132 #ifdef __cplusplus
133 }
134 #endif
135 #endif
136