blob: d8c6e912f72f56cbb77828604341384f1c065ddf (
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
|
/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FIR_FILTER_H
#define FIR_FILTER_H
#include <stdint.h>
typedef enum fir_filter_mode { FIR_SINGLE_FILTER = 0, FIR_PER_CHANNEL_FILTER } fir_filter_mode_t;
typedef struct fir_filter {
fir_filter_mode_t mode;
uint32_t channels;
uint32_t filter_length;
uint32_t buffer_size;
int16_t* coeffs;
int16_t* state;
} fir_filter_t;
fir_filter_t* fir_init(uint32_t channels, fir_filter_mode_t mode, uint32_t filter_length,
uint32_t input_length, int16_t* coeffs);
void fir_release(fir_filter_t* fir);
void fir_reset(fir_filter_t* fir);
void fir_process_interleaved(fir_filter_t* fir, int16_t* input, int16_t* output, uint32_t samples);
#endif /* #ifndef FIR_FILTER_H */
|
