1 /*
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12 // This header file includes the inline functions in
13 // the fix point signal processing library.
14
15 #ifndef WEBRTC_SPL_SPL_INL_H_
16 #define WEBRTC_SPL_SPL_INL_H_
17
18 #ifdef WEBRTC_ARCH_ARM_V7
19 #include "webrtc/common_audio/signal_processing/include/spl_inl_armv7.h"
20 #else
21
22 #if defined(MIPS32_LE)
23 #include "webrtc/common_audio/signal_processing/include/spl_inl_mips.h"
24 #endif
25
26 #if !defined(MIPS_DSP_R1_LE)
WebRtcSpl_SatW32ToW16(int32_t value32)27 static __inline int16_t WebRtcSpl_SatW32ToW16(int32_t value32) {
28 int16_t out16 = (int16_t) value32;
29
30 if (value32 > 32767)
31 out16 = 32767;
32 else if (value32 < -32768)
33 out16 = -32768;
34
35 return out16;
36 }
37
WebRtcSpl_AddSatW32(int32_t l_var1,int32_t l_var2)38 static __inline int32_t WebRtcSpl_AddSatW32(int32_t l_var1, int32_t l_var2) {
39 int32_t l_sum;
40
41 // Perform long addition
42 l_sum = l_var1 + l_var2;
43
44 if (l_var1 < 0) { // Check for underflow.
45 if ((l_var2 < 0) && (l_sum >= 0)) {
46 l_sum = (int32_t)0x80000000;
47 }
48 } else { // Check for overflow.
49 if ((l_var2 > 0) && (l_sum < 0)) {
50 l_sum = (int32_t)0x7FFFFFFF;
51 }
52 }
53
54 return l_sum;
55 }
56
WebRtcSpl_SubSatW32(int32_t l_var1,int32_t l_var2)57 static __inline int32_t WebRtcSpl_SubSatW32(int32_t l_var1, int32_t l_var2) {
58 int32_t l_diff;
59
60 // Perform subtraction.
61 l_diff = l_var1 - l_var2;
62
63 if (l_var1 < 0) { // Check for underflow.
64 if ((l_var2 > 0) && (l_diff > 0)) {
65 l_diff = (int32_t)0x80000000;
66 }
67 } else { // Check for overflow.
68 if ((l_var2 < 0) && (l_diff < 0)) {
69 l_diff = (int32_t)0x7FFFFFFF;
70 }
71 }
72
73 return l_diff;
74 }
75
WebRtcSpl_AddSatW16(int16_t a,int16_t b)76 static __inline int16_t WebRtcSpl_AddSatW16(int16_t a, int16_t b) {
77 return WebRtcSpl_SatW32ToW16((int32_t) a + (int32_t) b);
78 }
79
WebRtcSpl_SubSatW16(int16_t var1,int16_t var2)80 static __inline int16_t WebRtcSpl_SubSatW16(int16_t var1, int16_t var2) {
81 return WebRtcSpl_SatW32ToW16((int32_t) var1 - (int32_t) var2);
82 }
83 #endif // #if !defined(MIPS_DSP_R1_LE)
84
85 #if !defined(MIPS32_LE)
WebRtcSpl_GetSizeInBits(uint32_t n)86 static __inline int16_t WebRtcSpl_GetSizeInBits(uint32_t n) {
87 int16_t bits;
88
89 if (0xFFFF0000 & n) {
90 bits = 16;
91 } else {
92 bits = 0;
93 }
94 if (0x0000FF00 & (n >> bits)) bits += 8;
95 if (0x000000F0 & (n >> bits)) bits += 4;
96 if (0x0000000C & (n >> bits)) bits += 2;
97 if (0x00000002 & (n >> bits)) bits += 1;
98 if (0x00000001 & (n >> bits)) bits += 1;
99
100 return bits;
101 }
102
WebRtcSpl_NormW32(int32_t a)103 static __inline int16_t WebRtcSpl_NormW32(int32_t a) {
104 int16_t zeros;
105
106 if (a == 0) {
107 return 0;
108 }
109 else if (a < 0) {
110 a = ~a;
111 }
112
113 if (!(0xFFFF8000 & a)) {
114 zeros = 16;
115 } else {
116 zeros = 0;
117 }
118 if (!(0xFF800000 & (a << zeros))) zeros += 8;
119 if (!(0xF8000000 & (a << zeros))) zeros += 4;
120 if (!(0xE0000000 & (a << zeros))) zeros += 2;
121 if (!(0xC0000000 & (a << zeros))) zeros += 1;
122
123 return zeros;
124 }
125
WebRtcSpl_NormU32(uint32_t a)126 static __inline int16_t WebRtcSpl_NormU32(uint32_t a) {
127 int16_t zeros;
128
129 if (a == 0) return 0;
130
131 if (!(0xFFFF0000 & a)) {
132 zeros = 16;
133 } else {
134 zeros = 0;
135 }
136 if (!(0xFF000000 & (a << zeros))) zeros += 8;
137 if (!(0xF0000000 & (a << zeros))) zeros += 4;
138 if (!(0xC0000000 & (a << zeros))) zeros += 2;
139 if (!(0x80000000 & (a << zeros))) zeros += 1;
140
141 return zeros;
142 }
143
WebRtcSpl_NormW16(int16_t a)144 static __inline int16_t WebRtcSpl_NormW16(int16_t a) {
145 int16_t zeros;
146
147 if (a == 0) {
148 return 0;
149 }
150 else if (a < 0) {
151 a = ~a;
152 }
153
154 if (!(0xFF80 & a)) {
155 zeros = 8;
156 } else {
157 zeros = 0;
158 }
159 if (!(0xF800 & (a << zeros))) zeros += 4;
160 if (!(0xE000 & (a << zeros))) zeros += 2;
161 if (!(0xC000 & (a << zeros))) zeros += 1;
162
163 return zeros;
164 }
165
WebRtc_MulAccumW16(int16_t a,int16_t b,int32_t c)166 static __inline int32_t WebRtc_MulAccumW16(int16_t a, int16_t b, int32_t c) {
167 return (a * b + c);
168 }
169 #endif // #if !defined(MIPS32_LE)
170
171 #endif // WEBRTC_ARCH_ARM_V7
172
173 #endif // WEBRTC_SPL_SPL_INL_H_
174