1 /*
2 * Copyright (C) 2013-2015 Intel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16 #include <stdio.h>
17 #include <stddef.h>
18 #include <stdlib.h>
19 #include <stdint.h>
20
convert_uint8_to_float(void * buf,float * val,int samples)21 void convert_uint8_to_float(void *buf, float *val, int samples)
22 {
23 int i;
24
25 for (i = 0; i < samples; i++)
26 val[i] = ((uint8_t *) buf)[i];
27 }
28
convert_int16_to_float(void * buf,float * val,int samples)29 void convert_int16_to_float(void *buf, float *val, int samples)
30 {
31 int i;
32
33 for (i = 0; i < samples; i++)
34 val[i] = ((int16_t *) buf)[i];
35 }
36
convert_int24_to_float(void * buf,float * val,int samples)37 void convert_int24_to_float(void *buf, float *val, int samples)
38 {
39 int i;
40 int32_t tmp;
41
42 for (i = 0; i < samples; i++) {
43 tmp = ((uint8_t *) buf)[i * 3 + 2] << 24;
44 tmp |= ((uint8_t *) buf)[i * 3 + 1] << 16;
45 tmp |= ((uint8_t *) buf)[i * 3] << 8;
46 tmp >>= 8;
47 val[i] = tmp;
48 }
49 }
50
convert_int32_to_float(void * buf,float * val,int samples)51 void convert_int32_to_float(void *buf, float *val, int samples)
52 {
53 int i;
54
55 for (i = 0; i < samples; i++)
56 val[i] = ((int32_t *) buf)[i];
57 }
58
convert_float_to_uint8(float * val,void * buf,int samples,int channels)59 void convert_float_to_uint8(float *val, void *buf, int samples, int channels)
60 {
61 int i, c, idx;
62
63 for (i = 0; i < samples; i++) {
64 for (c = 0; c < channels; c++) {
65 idx = i * channels + c;
66 ((uint8_t *) buf)[idx] = (uint8_t) val[idx];
67 }
68 }
69 }
70
convert_float_to_int16(float * val,void * buf,int samples,int channels)71 void convert_float_to_int16(float *val, void *buf, int samples, int channels)
72 {
73 int i, c, idx;
74
75 for (i = 0; i < samples; i++) {
76 for (c = 0; c < channels; c++) {
77 idx = i * channels + c;
78 ((int16_t *) buf)[idx] = (int16_t) val[idx];
79 }
80 }
81 }
82
convert_float_to_int24(float * val,void * buf,int samples,int channels)83 void convert_float_to_int24(float *val, void *buf, int samples, int channels)
84 {
85 int i, c, idx_f, idx_i;
86 int32_t val_f_i;
87
88 for (i = 0; i < samples; i++) {
89 for (c = 0; c < channels; c++) {
90 idx_f = i * channels + c;
91 idx_i = 3 * idx_f;
92 val_f_i = (int32_t) val[idx_f];
93 ((int8_t *) buf)[idx_i + 0] =
94 (int8_t) (val_f_i & 0xff);
95 ((int8_t *) buf)[idx_i + 1] =
96 (int8_t) ((val_f_i >> 8) & 0xff);
97 ((int8_t *) buf)[idx_i + 2] =
98 (int8_t) ((val_f_i >> 16) & 0xff);
99 }
100 }
101 }
102
convert_float_to_int32(float * val,void * buf,int samples,int channels)103 void convert_float_to_int32(float *val, void *buf, int samples, int channels)
104 {
105 int i, c, idx;
106
107 for (i = 0; i < samples; i++) {
108 for (c = 0; c < channels; c++) {
109 idx = i * channels + c;
110 ((int32_t *) buf)[idx] = (int32_t) val[idx];
111 }
112 }
113 }
114