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/* mbed Microcontroller Library
* Copyright (c) 2006-2012 ARM Limited
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef FIR_F32_H
#define FIR_F32_H
#include <stdint.h>
#include "arm_math.h"
namespace dsp {
template<uint16_t num_taps, uint32_t block_size=32>
class FIR_f32 {
public:
FIR_f32(const float32_t *coeff) {
arm_fir_init_f32(&fir, num_taps, (float32_t*)coeff, fir_state, block_size);
}
void process(float32_t *sgn_in, float32_t *sgn_out) {
arm_fir_f32(&fir, sgn_in, sgn_out, block_size);
}
void reset(void) {
memset(fir_state, 0, sizeof(fir_state));
}
private:
arm_fir_instance_f32 fir;
float32_t fir_state[block_size + num_taps - 1];
};
}
#endif
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