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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