4
* Copyright (c) 2004-2005 Vassili Karpov (malc)
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:
13
* The above copyright notice and this permission notice shall be included in
14
* all copies or substantial portions of the Software.
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
26
* Tusen tack till Mike Nordell
27
* dec++'ified by Dscho
31
#define HALF (IN_MAX >> 1)
34
#define ET glue (ENDIAN_CONVERSION, glue (_, IN_T))
37
static mixeng_real inline glue (conv_, ET) (IN_T v)
39
IN_T nv = ENDIAN_CONVERT (v);
43
return nv * (1.f / (mixeng_real) (IN_MAX - IN_MIN));
45
return (nv - HALF) * (1.f / (mixeng_real) IN_MAX);
47
#else /* !RECIPROCAL */
49
return nv / (mixeng_real) ((mixeng_real) IN_MAX - IN_MIN);
51
return (nv - HALF) / (mixeng_real) IN_MAX;
56
static IN_T inline glue (clip_, ET) (mixeng_real v)
66
return ENDIAN_CONVERT ((IN_T) (v * ((mixeng_real) IN_MAX - IN_MIN)));
68
return ENDIAN_CONVERT ((IN_T) ((v * IN_MAX) + HALF));
72
#else /* !FLOAT_MIXENG */
74
static inline int64_t glue (conv_, ET) (IN_T v)
76
IN_T nv = ENDIAN_CONVERT (v);
78
return ((int64_t) nv) << (32 - SHIFT);
80
return ((int64_t) nv - HALF) << (32 - SHIFT);
84
static inline IN_T glue (clip_, ET) (int64_t v)
86
if (v >= 0x7f000000) {
89
else if (v < -2147483648LL) {
94
return ENDIAN_CONVERT ((IN_T) (v >> (32 - SHIFT)));
96
return ENDIAN_CONVERT ((IN_T) ((v >> (32 - SHIFT)) + HALF));
101
static void glue (glue (conv_, ET), _to_stereo)
102
(struct st_sample *dst, const void *src, int samples)
104
struct st_sample *out = dst;
105
IN_T *in = (IN_T *) src;
108
out->l = glue (conv_, ET) (*in++);
109
out->r = glue (conv_, ET) (*in++);
114
static void glue (glue (conv_, ET), _to_mono)
115
(struct st_sample *dst, const void *src, int samples)
117
struct st_sample *out = dst;
118
IN_T *in = (IN_T *) src;
121
out->l = glue (conv_, ET) (in[0]);
128
static void glue (glue (clip_, ET), _from_stereo)
129
(void *dst, const struct st_sample *src, int samples)
131
const struct st_sample *in = src;
132
IN_T *out = (IN_T *) dst;
134
*out++ = glue (clip_, ET) (in->l);
135
*out++ = glue (clip_, ET) (in->r);
140
static void glue (glue (clip_, ET), _from_mono)
141
(void *dst, const struct st_sample *src, int samples)
143
const struct st_sample *in = src;
144
IN_T *out = (IN_T *) dst;
146
*out++ = glue (clip_, ET) (in->l + in->r);