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42 lines
817 B
42 lines
817 B
8 years ago
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/*
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* AudioFilterBiquad_F32.cpp
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*
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* Chip Audette, OpenAudio, Apr 2017
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*
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* MIT License, Use at your own risk.
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*
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*/
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#include "AudioFilterBiquad_F32.h"
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void AudioFilterBiquad_F32::update(void)
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{
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audio_block_f32_t *block;
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block = AudioStream_F32::receiveWritable_f32();
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if (!block) return;
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// If there's no coefficient table, give up.
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if (coeff_p == NULL) {
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AudioStream_F32::release(block);
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return;
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}
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// do passthru
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if (coeff_p == IIR_F32_PASSTHRU) {
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// Just passthrough
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AudioStream_F32::transmit(block);
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AudioStream_F32::release(block);
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return;
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}
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// do IIR
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arm_biquad_cascade_df1_f32(&iir_inst, block->data, block->data, block->length);
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//transmit the data
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AudioStream_F32::transmit(block); // send the IIR output
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AudioStream_F32::release(block);
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}
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