diff options
Diffstat (limited to 'audio/fir_filter.h')
| -rw-r--r-- | audio/fir_filter.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/audio/fir_filter.h b/audio/fir_filter.h new file mode 100644 index 0000000..d8c6e91 --- /dev/null +++ b/audio/fir_filter.h @@ -0,0 +1,39 @@ +/* + * 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 */ |