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31 lines
654 B
31 lines
654 B
8 years ago
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#include "AudioMixer4_F32.h"
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void AudioMixer4_F32::update(void) {
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audio_block_f32_t *in, *out=NULL;
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out = receiveWritable_f32(0);
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if (!out) return;
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arm_scale_f32(out->data, multiplier[0], out->data, AUDIO_BLOCK_SAMPLES);
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for (int channel=1; channel < 4; channel++) {
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in = receiveReadOnly_f32(channel);
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if (!in) {
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continue;
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}
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audio_block_f32_t *tmp = allocate_f32();
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arm_scale_f32(in->data, multiplier[channel], tmp->data, AUDIO_BLOCK_SAMPLES);
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arm_add_f32(out->data, tmp->data, out->data, AUDIO_BLOCK_SAMPLES);
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release(tmp);
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release(in);
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}
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if (out) {
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transmit(out);
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release(out);
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}
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}
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