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76 lines
2.0 KiB
76 lines
2.0 KiB
/* Fix 1 to n problem Bob Larkin June 2020
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* Adapted to Chip Audette's Tympan routine. Allows random channels.
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* Class name does not have "_OA" to be backward compatible.
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*
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* MIT License. use at your own risk.
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*/
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#include "AudioMixer_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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int channel = 0;
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//get the first available channel
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while (channel < 4) {
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out = receiveWritable_f32(channel);
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if (out) break;
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channel++;
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}
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if (!out) return; //there was no data output array available, so exit.
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arm_scale_f32(out->data, multiplier[channel], out->data, out->length);
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//add in the remaining channels, as available
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channel++;
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while (channel < 4) {
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in = receiveReadOnly_f32(channel);
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if (in) {
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audio_block_f32_t *tmp = allocate_f32();
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arm_scale_f32(in->data, multiplier[channel], tmp->data, tmp->length);
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arm_add_f32(out->data, tmp->data, out->data, tmp->length);
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AudioStream_F32::release(tmp);
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AudioStream_F32::release(in);
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} else {
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//do nothing, this vector is empty
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}
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channel++;
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}
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AudioStream_F32::transmit(out);
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AudioStream_F32::release(out);
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}
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void AudioMixer8_F32::update(void) {
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audio_block_f32_t *in, *out=NULL;
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//get the first available channel
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int channel = 0;
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while (channel < 8) {
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out = receiveWritable_f32(channel);
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if (out) break;
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channel++;
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}
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if (!out) return; //there was no data output array. so exit.
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arm_scale_f32(out->data, multiplier[channel], out->data, out->length);
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//add in the remaining channels, as available
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channel++;
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while (channel < 8) {
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in = receiveReadOnly_f32(channel);
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if (in) {
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audio_block_f32_t *tmp = allocate_f32();
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arm_scale_f32(in->data, multiplier[channel], tmp->data, tmp->length);
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arm_add_f32(out->data, tmp->data, out->data, tmp->length);
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AudioStream_F32::release(tmp);
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AudioStream_F32::release(in);
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} else {
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//do nothing, this vector is empty
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}
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channel++;
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}
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AudioStream_F32::transmit(out);
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AudioStream_F32::release(out);
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}
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