hw/arm/virt: parameter passing cleanups
[qemu.git] / audio / mixeng_template.h
1 /*
2 * QEMU Mixing engine
3 *
4 * Copyright (c) 2004-2005 Vassili Karpov (malc)
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 /*
26 * Tusen tack till Mike Nordell
27 * dec++'ified by Dscho
28 */
29
30 #ifndef SIGNED
31 #define HALF (IN_MAX >> 1)
32 #endif
33
34 #define ET glue (ENDIAN_CONVERSION, glue (glue (glue (_, ITYPE), BSIZE), _t))
35 #define IN_T glue (glue (ITYPE, BSIZE), _t)
36
37 #ifdef FLOAT_MIXENG
38 static inline mixeng_real glue (conv_, ET) (IN_T v)
39 {
40 IN_T nv = ENDIAN_CONVERT (v);
41
42 #ifdef RECIPROCAL
43 #ifdef SIGNED
44 return nv * (1.f / (mixeng_real) (IN_MAX - IN_MIN));
45 #else
46 return (nv - HALF) * (1.f / (mixeng_real) IN_MAX);
47 #endif
48 #else /* !RECIPROCAL */
49 #ifdef SIGNED
50 return nv / (mixeng_real) ((mixeng_real) IN_MAX - IN_MIN);
51 #else
52 return (nv - HALF) / (mixeng_real) IN_MAX;
53 #endif
54 #endif
55 }
56
57 static inline IN_T glue (clip_, ET) (mixeng_real v)
58 {
59 if (v >= 0.5) {
60 return IN_MAX;
61 }
62 else if (v < -0.5) {
63 return IN_MIN;
64 }
65
66 #ifdef SIGNED
67 return ENDIAN_CONVERT ((IN_T) (v * ((mixeng_real) IN_MAX - IN_MIN)));
68 #else
69 return ENDIAN_CONVERT ((IN_T) ((v * IN_MAX) + HALF));
70 #endif
71 }
72
73 #else /* !FLOAT_MIXENG */
74
75 static inline int64_t glue (conv_, ET) (IN_T v)
76 {
77 IN_T nv = ENDIAN_CONVERT (v);
78 #ifdef SIGNED
79 return ((int64_t) nv) << (32 - SHIFT);
80 #else
81 return ((int64_t) nv - HALF) << (32 - SHIFT);
82 #endif
83 }
84
85 static inline IN_T glue (clip_, ET) (int64_t v)
86 {
87 if (v >= 0x7f000000) {
88 return IN_MAX;
89 }
90 else if (v < -2147483648LL) {
91 return IN_MIN;
92 }
93
94 #ifdef SIGNED
95 return ENDIAN_CONVERT ((IN_T) (v >> (32 - SHIFT)));
96 #else
97 return ENDIAN_CONVERT ((IN_T) ((v >> (32 - SHIFT)) + HALF));
98 #endif
99 }
100 #endif
101
102 static void glue (glue (conv_, ET), _to_stereo)
103 (struct st_sample *dst, const void *src, int samples)
104 {
105 struct st_sample *out = dst;
106 IN_T *in = (IN_T *) src;
107
108 while (samples--) {
109 out->l = glue (conv_, ET) (*in++);
110 out->r = glue (conv_, ET) (*in++);
111 out += 1;
112 }
113 }
114
115 static void glue (glue (conv_, ET), _to_mono)
116 (struct st_sample *dst, const void *src, int samples)
117 {
118 struct st_sample *out = dst;
119 IN_T *in = (IN_T *) src;
120
121 while (samples--) {
122 out->l = glue (conv_, ET) (in[0]);
123 out->r = out->l;
124 out += 1;
125 in += 1;
126 }
127 }
128
129 static void glue (glue (clip_, ET), _from_stereo)
130 (void *dst, const struct st_sample *src, int samples)
131 {
132 const struct st_sample *in = src;
133 IN_T *out = (IN_T *) dst;
134 while (samples--) {
135 *out++ = glue (clip_, ET) (in->l);
136 *out++ = glue (clip_, ET) (in->r);
137 in += 1;
138 }
139 }
140
141 static void glue (glue (clip_, ET), _from_mono)
142 (void *dst, const struct st_sample *src, int samples)
143 {
144 const struct st_sample *in = src;
145 IN_T *out = (IN_T *) dst;
146 while (samples--) {
147 *out++ = glue (clip_, ET) (in->l + in->r);
148 in += 1;
149 }
150 }
151
152 #undef ET
153 #undef HALF
154 #undef IN_T