summaryrefslogtreecommitdiff
path: root/src/pulsecore/sconv.c
blob: 2e5e2dbefa5f3755409b3058a499df2002881e19 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
/* $Id$ */

/***
  This file is part of PulseAudio.
 
  PulseAudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published
  by the Free Software Foundation; either version 2 of the License,
  or (at your option) any later version.
 
  PulseAudio is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public License
  along with PulseAudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

#include <liboil/liboilfuncs.h>
#include <liboil/liboil.h>

#include <pulsecore/g711.h>

#include "endianmacros.h"
#include "sconv-s16le.h"
#include "sconv-s16be.h"

#include "sconv.h"

static void u8_to_float32ne(unsigned n, const void *a, float *b) {
    const uint8_t *ca = a;
    static const double add = -128.0/127.0, factor = 1.0/127.0;
    
    assert(a);
    assert(b);

    oil_scaleconv_f32_u8(b, ca, n, &add, &factor);
}    

static void u8_from_float32ne(unsigned n, const float *a, void *b) {
    uint8_t *cb = b;
    static const double add = 128.0, factor = 127.0;

    assert(a);
    assert(b);

    oil_scaleconv_u8_f32(cb, a, n, &add, &factor);
}

static void float32ne_to_float32ne(unsigned n, const void *a, float *b) {
    assert(a);
    assert(b);

    oil_memcpy(b, a, sizeof(float) * n);
}

static void float32ne_from_float32ne(unsigned n, const float *a, void *b) {
    assert(a);
    assert(b);

    oil_memcpy(b, a, sizeof(float) * n);
}

static void float32re_to_float32ne(unsigned n, const void *a, float *b) {
    assert(a);
    assert(b);

    while (n-- > 0)
        ((uint32_t *)b)[n] = UINT32_SWAP (((uint32_t *)a)[n]);
}

static void float32re_from_float32ne(unsigned n, const float *a, void *b) {
    assert(a);
    assert(b);

    while (n-- > 0)
        ((uint32_t *)b)[n] = UINT32_SWAP (((uint32_t *)a)[n]);
}

static void ulaw_to_float32ne(unsigned n, const void *a, float *b) {
    const uint8_t *ca = a;

    assert(a);
    assert(b);
    
    for (; n > 0; n--)
        *(b++) = st_ulaw2linear16(*(ca++)) * 1.0F / 0x7FFF;
}

static void ulaw_from_float32ne(unsigned n, const float *a, void *b) {
    uint8_t *cb = b;

    assert(a);
    assert(b);
    
    for (; n > 0; n--) {
        float v = *(a++);

        if (v > 1)
            v = 1;

        if (v < -1)
            v = -1;

        *(cb++) = st_14linear2ulaw((int16_t) (v * 0x1FFF));
    }
}

static void alaw_to_float32ne(unsigned n, const void *a, float *b) {
    const uint8_t *ca = a;

    assert(a);
    assert(b);

    for (; n > 0; n--)
        *(b++) = st_alaw2linear16(*(ca++)) * 1.0F / 0x7FFF;
}

static void alaw_from_float32ne(unsigned n, const float *a, void *b) {
    uint8_t *cb = b;

    assert(a);
    assert(b);
    
    for (; n > 0; n--) {
        float v = *(a++);

        if (v > 1)
            v = 1;

        if (v < -1)
            v = -1;

        *(cb++) = st_13linear2alaw((int16_t) (v * 0xFFF));
    }
}

pa_convert_to_float32ne_func_t pa_get_convert_to_float32ne_function(pa_sample_format_t f) {
    switch(f) {
        case PA_SAMPLE_U8:
            return u8_to_float32ne;
        case PA_SAMPLE_S16LE:
            return pa_sconv_s16le_to_float32ne;
        case PA_SAMPLE_S16BE:
            return pa_sconv_s16be_to_float32ne;
        case PA_SAMPLE_FLOAT32NE:
            return float32ne_to_float32ne;
        case PA_SAMPLE_FLOAT32RE:
            return float32re_to_float32ne;
        case PA_SAMPLE_ALAW:
            return alaw_to_float32ne;
        case PA_SAMPLE_ULAW:
            return ulaw_to_float32ne;
        default:
            return NULL;
    }
}

pa_convert_from_float32ne_func_t pa_get_convert_from_float32ne_function(pa_sample_format_t f) {
    switch(f) {
        case PA_SAMPLE_U8:
            return u8_from_float32ne;
        case PA_SAMPLE_S16LE:
            return pa_sconv_s16le_from_float32ne;
        case PA_SAMPLE_S16BE:
            return pa_sconv_s16be_from_float32ne;
        case PA_SAMPLE_FLOAT32NE:
            return float32ne_from_float32ne;
        case PA_SAMPLE_FLOAT32RE:
            return float32re_from_float32ne;
        case PA_SAMPLE_ALAW:
            return alaw_from_float32ne;
        case PA_SAMPLE_ULAW:
            return ulaw_from_float32ne;
        default:
            return NULL;
    }
}