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Diffstat (limited to 'lib/rbcodec/codecs/libopus/celt/fixed_generic.h')
-rw-r--r-- | lib/rbcodec/codecs/libopus/celt/fixed_generic.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/celt/fixed_generic.h b/lib/rbcodec/codecs/libopus/celt/fixed_generic.h new file mode 100644 index 0000000000..71e28d62a8 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/celt/fixed_generic.h | |||
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1 | /* Copyright (C) 2007-2009 Xiph.Org Foundation | ||
2 | Copyright (C) 2003-2008 Jean-Marc Valin | ||
3 | Copyright (C) 2007-2008 CSIRO */ | ||
4 | /** | ||
5 | @file fixed_generic.h | ||
6 | @brief Generic fixed-point operations | ||
7 | */ | ||
8 | /* | ||
9 | Redistribution and use in source and binary forms, with or without | ||
10 | modification, are permitted provided that the following conditions | ||
11 | are met: | ||
12 | |||
13 | - Redistributions of source code must retain the above copyright | ||
14 | notice, this list of conditions and the following disclaimer. | ||
15 | |||
16 | - Redistributions in binary form must reproduce the above copyright | ||
17 | notice, this list of conditions and the following disclaimer in the | ||
18 | documentation and/or other materials provided with the distribution. | ||
19 | |||
20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
21 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
22 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
23 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | ||
24 | OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
25 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
26 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
27 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
28 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
29 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
30 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
31 | */ | ||
32 | |||
33 | #ifndef FIXED_GENERIC_H | ||
34 | #define FIXED_GENERIC_H | ||
35 | |||
36 | /** Multiply a 16-bit signed value by a 16-bit unsigned value. The result is a 32-bit signed value */ | ||
37 | #define MULT16_16SU(a,b) ((opus_val32)(opus_val16)(a)*(opus_val32)(opus_uint16)(b)) | ||
38 | |||
39 | /** 16x32 multiplication, followed by a 16-bit shift right. Results fits in 32 bits */ | ||
40 | #define MULT16_32_Q16(a,b) ADD32(MULT16_16((a),SHR((b),16)), SHR(MULT16_16SU((a),((b)&0x0000ffff)),16)) | ||
41 | |||
42 | /** 16x32 multiplication, followed by a 16-bit shift right (round-to-nearest). Results fits in 32 bits */ | ||
43 | #define MULT16_32_P16(a,b) ADD32(MULT16_16((a),SHR((b),16)), PSHR(MULT16_16((a),((b)&0x0000ffff)),16)) | ||
44 | |||
45 | /** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 bits */ | ||
46 | #define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_16SU((a),((b)&0x0000ffff)),15)) | ||
47 | |||
48 | /** 32x32 multiplication, followed by a 31-bit shift right. Results fits in 32 bits */ | ||
49 | #define MULT32_32_Q31(a,b) ADD32(ADD32(SHL(MULT16_16(SHR((a),16),SHR((b),16)),1), SHR(MULT16_16SU(SHR((a),16),((b)&0x0000ffff)),15)), SHR(MULT16_16SU(SHR((b),16),((a)&0x0000ffff)),15)) | ||
50 | |||
51 | /** Compile-time conversion of float constant to 16-bit value */ | ||
52 | #define QCONST16(x,bits) ((opus_val16)(.5+(x)*(((opus_val32)1)<<(bits)))) | ||
53 | |||
54 | /** Compile-time conversion of float constant to 32-bit value */ | ||
55 | #define QCONST32(x,bits) ((opus_val32)(.5+(x)*(((opus_val32)1)<<(bits)))) | ||
56 | |||
57 | /** Negate a 16-bit value */ | ||
58 | #define NEG16(x) (-(x)) | ||
59 | /** Negate a 32-bit value */ | ||
60 | #define NEG32(x) (-(x)) | ||
61 | |||
62 | /** Change a 32-bit value into a 16-bit value. The value is assumed to fit in 16-bit, otherwise the result is undefined */ | ||
63 | #define EXTRACT16(x) ((opus_val16)(x)) | ||
64 | /** Change a 16-bit value into a 32-bit value */ | ||
65 | #define EXTEND32(x) ((opus_val32)(x)) | ||
66 | |||
67 | /** Arithmetic shift-right of a 16-bit value */ | ||
68 | #define SHR16(a,shift) ((a) >> (shift)) | ||
69 | /** Arithmetic shift-left of a 16-bit value */ | ||
70 | #define SHL16(a,shift) ((opus_int16)((opus_uint16)(a)<<(shift))) | ||
71 | /** Arithmetic shift-right of a 32-bit value */ | ||
72 | #define SHR32(a,shift) ((a) >> (shift)) | ||
73 | /** Arithmetic shift-left of a 32-bit value */ | ||
74 | #define SHL32(a,shift) ((opus_int32)((opus_uint32)(a)<<(shift))) | ||
75 | |||
76 | /** 32-bit arithmetic shift right with rounding-to-nearest instead of rounding down */ | ||
77 | #define PSHR32(a,shift) (SHR32((a)+((EXTEND32(1)<<((shift))>>1)),shift)) | ||
78 | /** 32-bit arithmetic shift right where the argument can be negative */ | ||
79 | #define VSHR32(a, shift) (((shift)>0) ? SHR32(a, shift) : SHL32(a, -(shift))) | ||
80 | |||
81 | /** "RAW" macros, should not be used outside of this header file */ | ||
82 | #define SHR(a,shift) ((a) >> (shift)) | ||
83 | #define SHL(a,shift) SHL32(a,shift) | ||
84 | #define PSHR(a,shift) (SHR((a)+((EXTEND32(1)<<((shift))>>1)),shift)) | ||
85 | #define SATURATE(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x))) | ||
86 | |||
87 | /** Shift by a and round-to-neareast 32-bit value. Result is a 16-bit value */ | ||
88 | #define ROUND16(x,a) (EXTRACT16(PSHR32((x),(a)))) | ||
89 | /** Divide by two */ | ||
90 | #define HALF16(x) (SHR16(x,1)) | ||
91 | #define HALF32(x) (SHR32(x,1)) | ||
92 | |||
93 | /** Add two 16-bit values */ | ||
94 | #define ADD16(a,b) ((opus_val16)((opus_val16)(a)+(opus_val16)(b))) | ||
95 | /** Subtract two 16-bit values */ | ||
96 | #define SUB16(a,b) ((opus_val16)(a)-(opus_val16)(b)) | ||
97 | /** Add two 32-bit values */ | ||
98 | #define ADD32(a,b) ((opus_val32)(a)+(opus_val32)(b)) | ||
99 | /** Subtract two 32-bit values */ | ||
100 | #define SUB32(a,b) ((opus_val32)(a)-(opus_val32)(b)) | ||
101 | |||
102 | /** 16x16 multiplication where the result fits in 16 bits */ | ||
103 | #define MULT16_16_16(a,b) ((((opus_val16)(a))*((opus_val16)(b)))) | ||
104 | |||
105 | /* (opus_val32)(opus_val16) gives TI compiler a hint that it's 16x16->32 multiply */ | ||
106 | /** 16x16 multiplication where the result fits in 32 bits */ | ||
107 | #define MULT16_16(a,b) (((opus_val32)(opus_val16)(a))*((opus_val32)(opus_val16)(b))) | ||
108 | |||
109 | /** 16x16 multiply-add where the result fits in 32 bits */ | ||
110 | #define MAC16_16(c,a,b) (ADD32((c),MULT16_16((a),(b)))) | ||
111 | /** 16x32 multiply-add, followed by a 15-bit shift right. Results fits in 32 bits */ | ||
112 | #define MAC16_32_Q15(c,a,b) ADD32(c,ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15))) | ||
113 | |||
114 | #define MULT16_16_Q11_32(a,b) (SHR(MULT16_16((a),(b)),11)) | ||
115 | #define MULT16_16_Q13(a,b) (SHR(MULT16_16((a),(b)),13)) | ||
116 | #define MULT16_16_Q14(a,b) (SHR(MULT16_16((a),(b)),14)) | ||
117 | #define MULT16_16_Q15(a,b) (SHR(MULT16_16((a),(b)),15)) | ||
118 | |||
119 | #define MULT16_16_P13(a,b) (SHR(ADD32(4096,MULT16_16((a),(b))),13)) | ||
120 | #define MULT16_16_P14(a,b) (SHR(ADD32(8192,MULT16_16((a),(b))),14)) | ||
121 | #define MULT16_16_P15(a,b) (SHR(ADD32(16384,MULT16_16((a),(b))),15)) | ||
122 | |||
123 | /** Divide a 32-bit value by a 16-bit value. Result fits in 16 bits */ | ||
124 | #define DIV32_16(a,b) ((opus_val16)(((opus_val32)(a))/((opus_val16)(b)))) | ||
125 | |||
126 | /** Divide a 32-bit value by a 32-bit value. Result fits in 32 bits */ | ||
127 | #define DIV32(a,b) (((opus_val32)(a))/((opus_val32)(b))) | ||
128 | |||
129 | #endif | ||