1 /******************************************************************************
2 * *
3 * Copyright (C) 2018 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 #ifndef IXHEAAC_BASIC_OPS_H
21 #define IXHEAAC_BASIC_OPS_H
22
23 #define MIN(a, b) ((a) < (b) ? (a) : (b))
24 #define MAX(a, b) ((a) > (b) ? (a) : (b))
25
ixheaac_extract16h(WORD32 var)26 static PLATFORM_INLINE WORD16 ixheaac_extract16h(WORD32 var) {
27 WORD16 var_out;
28
29 var_out = (WORD16)(var >> 16);
30 return (var_out);
31 }
32
ixheaac_extract16l(WORD32 var)33 static PLATFORM_INLINE WORD16 ixheaac_extract16l(WORD32 var) {
34 WORD16 var_out;
35
36 var_out = (WORD16)var;
37 return (var_out);
38 }
39
ixheaac_deposit16h_in32(WORD16 var)40 static PLATFORM_INLINE WORD32 ixheaac_deposit16h_in32(WORD16 var) {
41 WORD32 var_out;
42
43 var_out = (WORD32)var << 16;
44 return (var_out);
45 }
46
ixheaac_deposit16l_in32(WORD16 var)47 static PLATFORM_INLINE WORD32 ixheaac_deposit16l_in32(WORD16 var) {
48 WORD32 var_out;
49
50 var_out = (WORD32)var;
51 return (var_out);
52 }
53
ixheaac_extu(UWORD32 a,WORD32 shift_left,WORD32 shift_right)54 static PLATFORM_INLINE UWORD32 ixheaac_extu(UWORD32 a, WORD32 shift_left, WORD32 shift_right) {
55 UWORD32 x;
56 x = (UWORD32)a << shift_left;
57 x = (UWORD32)x >> shift_right;
58
59 return x;
60 }
61
ixheaac_mult32x16h_in32_shl_sat(WORD32 a,WORD32 b)62 static PLATFORM_INLINE WORD32 ixheaac_mult32x16h_in32_shl_sat(WORD32 a, WORD32 b) {
63 WORD32 result;
64
65 if (a == (WORD32)0x80000000 && b == (WORD16)0x8000) {
66 result = (WORD32)0x7fffffff;
67 } else {
68 result = ixheaac_mult32x16in32_shl(a, ixheaac_extract16h(b));
69 }
70
71 return (result);
72 }
73
ixheaac_div32_pos_normb(WORD32 a,WORD32 b)74 static PLATFORM_INLINE WORD32 ixheaac_div32_pos_normb(WORD32 a, WORD32 b) {
75 WORD32 quotient;
76 UWORD32 mantissa_nr = a;
77 UWORD32 mantissa_dr = b;
78
79 LOOPINDEX i;
80
81 if (a == b) {
82 quotient = MAX_32;
83 } else {
84 quotient = 0;
85
86 for (i = 0; i < 32; i++) {
87 quotient = quotient << 1;
88
89 if (mantissa_nr >= mantissa_dr) {
90 mantissa_nr = mantissa_nr - mantissa_dr;
91 quotient += 1;
92 }
93
94 mantissa_nr = (UWORD32)mantissa_nr << 1;
95 }
96 }
97
98 return quotient;
99 }
100
ixheaac_shr32_dir_sat_limit(WORD32 a,WORD b)101 static PLATFORM_INLINE WORD32 ixheaac_shr32_dir_sat_limit(WORD32 a, WORD b) {
102 WORD32 out_val;
103
104 if (b < 0) {
105 out_val = ixheaac_shl32_sat(a, -b);
106 } else {
107 b = ixheaac_min32(b, 31);
108 out_val = ixheaac_shr32(a, b);
109 }
110
111 return out_val;
112 }
113
ixheaac_shl32_dir_sat_limit(WORD32 a,WORD b)114 static PLATFORM_INLINE WORD32 ixheaac_shl32_dir_sat_limit(WORD32 a, WORD b) {
115 WORD32 out_val;
116
117 if (b < 0) {
118 b = -b;
119 b = ixheaac_min32(b, 31);
120 out_val = ixheaac_shr32(a, b);
121 } else {
122 out_val = ixheaac_shl32_sat(a, b);
123 }
124
125 return out_val;
126 }
127
ixheaac_mac32x32in64_dual(WORD32 a,WORD32 b,WORD64 c)128 static PLATFORM_INLINE WORD64 ixheaac_mac32x32in64_dual(WORD32 a, WORD32 b, WORD64 c) {
129 WORD64 result;
130 WORD64 temp_result;
131
132 temp_result = (WORD64)a * (WORD64)b;
133 result = ixheaac_add64_sat(c, temp_result);
134 return (result);
135 }
136
137 #endif /* IXHEAAC_BASIC_OPS_H */
138