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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-dsp-lib
* Created on: 31 мар. 2020 г.
*
* lsp-dsp-lib 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 3 of the License, or
* any later version.
*
* lsp-dsp-lib 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-dsp-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_DSP_COMMON_RESAMPLING_H_
#define LSP_PLUG_IN_DSP_COMMON_RESAMPLING_H_
#include <lsp-plug.in/dsp/common/types.h>
#ifdef __cplusplus
namespace lsp
{
namespace dsp
{
#endif /* __cplusplus */
/** Resampling/oversampling funtion type.
* Remember that destination buffer must be times greater and have additional gap (>=64 samples) at
* the tail to contain complete convolution tail after resampling.
* Consider using LSP_DSP_RESAMPLING_RSV_SAMPLES constant fo fullfill buffer requirements
*
* @param dst destination buffer
* @param src source buffer
* @param count number of samples to process
*/
typedef void (* LSP_DSP_LIB_TYPE(resampling_function_t))(float *dst, const float *src, size_t count);
#ifdef __cplusplus
}
}
#endif /* __cplusplus */
/**
* The number of additionally reserved samples at the tail of the buffer
*/
#define LSP_DSP_RESAMPLING_RSV_SAMPLES 64
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*2 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_2x2, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*2 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_2x3, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*2 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_2x4, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*3 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_3x2, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*3 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_3x3, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*3 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_3x4, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*4 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_4x2, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*4 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_4x3, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*4 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_4x4, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*6 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_6x2, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*6 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_6x3, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*6 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_6x4, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*8 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_8x2, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*8 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_8x3, float *dst, const float *src, size_t count);
/** Perform lanczos resampling, destination buffer must be cleared and contain only
* resampling tail from previous resampling
*
* @param dst destination buffer of count*8 samples + LSP_DSP_RESAMPLING_RSV_SAMPLES samples for convolution tail
* @param src source buffer of count samples
* @param count number of samples
*/
LSP_DSP_LIB_SYMBOL(void, lanczos_resample_8x4, float *dst, const float *src, size_t count);
/** Copy each even sample to output buffer
*
* @param dst destination buffer
* @param src source buffer
* @param count number of samples to process
*/
LSP_DSP_LIB_SYMBOL(void, downsample_2x, float *dst, const float *src, size_t count);
/** Copy each 3rd sample to output buffer
*
* @param dst destination buffer
* @param src source buffer
* @param count number of samples to process
*/
LSP_DSP_LIB_SYMBOL(void, downsample_3x, float *dst, const float *src, size_t count);
/** Copy each 4th sample to output buffer
*
* @param dst destination buffer
* @param src source buffer
* @param count number of samples to process
*/
LSP_DSP_LIB_SYMBOL(void, downsample_4x, float *dst, const float *src, size_t count);
/** Copy each 6th sample to output buffer
*
* @param dst destination buffer
* @param src source buffer
* @param count number of samples to process
*/
LSP_DSP_LIB_SYMBOL(void, downsample_6x, float *dst, const float *src, size_t count);
/** Copy each 8th sample to output buffer
*
* @param dst destination buffer
* @param src source buffer
* @param count number of samples to process
*/
LSP_DSP_LIB_SYMBOL(void, downsample_8x, float *dst, const float *src, size_t count);
#endif /* LSP_PLUG_IN_DSP_COMMON_RESAMPLING_H_ */
|
