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https://github.com/jhbruhn/eurorack.git
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51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
#include "processor.h"
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#include "stmlib/stmlib.h"
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#include "stmlib/utils/dsp.h"
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#include <math.h>
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using namespace stereo_mix;
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using namespace stmlib;
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const int kVolumeFilterValue = 65535;
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void Processor::Process(int16_t cvs[], uint16_t* outs)
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{
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uint32_t value_l;
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uint32_t value_r;
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uint16_t pan_pot = (pan_offset + 32767L) >> (16 - 12); // adc is only 12 bit anyways
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uint16_t vol_pot = (volume_offset) >> (16 - 12);
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int16_t pan_cv = cvs[0] >> (16 - 12);
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int16_t vol_cv = cvs[1] >> (16 - 12);
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int32_t pan = pan_pot + pan_cv;
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int32_t lin = volume_offset + (cvs[1] * 2);
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CONSTRAIN(lin, 0, 65535);
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lin *= !mute;
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linear_vol = lin;
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uint16_t vol_pot_exp = lut_linear_to_exp[vol_pot];
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uint16_t vol_pot_log = 65535 - lut_linear_to_exp[LUT_LINEAR_TO_EXP_SIZE - 1 - vol_pot];
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vol_pot = Mix(vol_pot_exp, vol_pot_log, log_exp_mix_pot);
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uint16_t vol_cv_absu16 = abs(vol_cv) << 1;
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uint16_t vol_cv_exp = lut_linear_to_exp[vol_cv_absu16];
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uint16_t vol_cv_log = 65535 - lut_linear_to_exp[LUT_LINEAR_TO_EXP_SIZE - 1 - vol_cv_absu16];
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uint16_t vol_cv_pre = Mix(vol_cv_exp, vol_cv_log, log_exp_mix_cv);
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int32_t vol = vol_pot;
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vol += vol_cv > 0 ? vol_cv_pre : -vol_cv_pre;
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vol *= !mute;
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CONSTRAIN(pan, 0, (1 << 16) - 1);
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CONSTRAIN(vol, 0, (1 << 16) - 1);
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previous_vol = vol;
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// leds.set_intensity(i, vol >> 4);
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value_l = (lut_left_sin_pan[pan] * vol) >> 16;
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value_r = (lut_right_cos_pan[pan] * vol) >> 16;
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outs[0] = value_r;
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outs[1] = value_l;
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}
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