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 "aconfig.h"
17 #include <stdio.h>
18 #include <stddef.h>
19 #include <stdlib.h>
20 #include <stdint.h>
21
convert_uint8_to_float(void * buf,float * val,int samples)22 void convert_uint8_to_float(void *buf, float *val, int samples)
23 {
24 int i;
25
26 for (i = 0; i < samples; i++)
27 val[i] = ((uint8_t *) buf)[i];
28 }
29
convert_int16_to_float(void * buf,float * val,int samples)30 void convert_int16_to_float(void *buf, float *val, int samples)
31 {
32 int i;
33
34 for (i = 0; i < samples; i++)
35 val[i] = ((int16_t *) buf)[i];
36 }
37
convert_int24_to_float(void * buf,float * val,int samples)38 void convert_int24_to_float(void *buf, float *val, int samples)
39 {
40 int i;
41 int32_t tmp;
42
43 for (i = 0; i < samples; i++) {
44 tmp = ((uint8_t *) buf)[i * 3 + 2] << 24;
45 tmp |= ((uint8_t *) buf)[i * 3 + 1] << 16;
46 tmp |= ((uint8_t *) buf)[i * 3] << 8;
47 tmp >>= 8;
48 val[i] = tmp;
49 }
50 }
51
convert_int32_to_float(void * buf,float * val,int samples)52 void convert_int32_to_float(void *buf, float *val, int samples)
53 {
54 int i;
55
56 for (i = 0; i < samples; i++)
57 val[i] = ((int32_t *) buf)[i];
58 }
59
convert_float_to_uint8(float * val,void * buf,int samples,int channels)60 void convert_float_to_uint8(float *val, void *buf, int samples, int channels)
61 {
62 int i, c, idx;
63
64 for (i = 0; i < samples; i++) {
65 for (c = 0; c < channels; c++) {
66 idx = i * channels + c;
67 ((uint8_t *) buf)[idx] = (uint8_t) val[idx];
68 }
69 }
70 }
71
convert_float_to_int16(float * val,void * buf,int samples,int channels)72 void convert_float_to_int16(float *val, void *buf, int samples, int channels)
73 {
74 int i, c, idx;
75
76 for (i = 0; i < samples; i++) {
77 for (c = 0; c < channels; c++) {
78 idx = i * channels + c;
79 ((int16_t *) buf)[idx] = (int16_t) val[idx];
80 }
81 }
82 }
83
convert_float_to_int24(float * val,void * buf,int samples,int channels)84 void convert_float_to_int24(float *val, void *buf, int samples, int channels)
85 {
86 int i, c, idx_f, idx_i;
87 int32_t val_f_i;
88
89 for (i = 0; i < samples; i++) {
90 for (c = 0; c < channels; c++) {
91 idx_f = i * channels + c;
92 idx_i = 3 * idx_f;
93 val_f_i = (int32_t) val[idx_f];
94 ((int8_t *) buf)[idx_i + 0] =
95 (int8_t) (val_f_i & 0xff);
96 ((int8_t *) buf)[idx_i + 1] =
97 (int8_t) ((val_f_i >> 8) & 0xff);
98 ((int8_t *) buf)[idx_i + 2] =
99 (int8_t) ((val_f_i >> 16) & 0xff);
100 }
101 }
102 }
103
convert_float_to_int32(float * val,void * buf,int samples,int channels)104 void convert_float_to_int32(float *val, void *buf, int samples, int channels)
105 {
106 int i, c, idx;
107
108 for (i = 0; i < samples; i++) {
109 for (c = 0; c < channels; c++) {
110 idx = i * channels + c;
111 ((int32_t *) buf)[idx] = (int32_t) val[idx];
112 }
113 }
114 }
115