i give up

lib/filters.c

@@ -12,36 +12,4 @@ float apply_preemphasis(ResistorCapacitor *filter, float sample) {
 
 float hard_clip(float sample, float threshold) {
     return fmaxf(-threshold, fminf(threshold, sample));
-}
-
-void init_pll(PLL *pll, float reference_frequency, float target_frequency, float sample_rate) {
-    pll->reference_frequency = reference_frequency;
-    pll->target_frequency = target_frequency;
-    pll->multiplier = target_frequency / reference_frequency;
-    pll->sample_rate = sample_rate;
-    
-    pll->phase_error = 0.0f;
-    pll->loop_filter = 0.0f;
-    pll->vco_phase = 0.0f;
-    pll->vco_frequency = target_frequency;
-    
-    pll->loop_gain = 0.01f;
-    pll->filter_coefficient = 0.1f;
-}
-
-float update_pll(PLL *pll, float reference_signal) {
-    float vco_divided_phase = fmodf(pll->vco_phase / pll->multiplier, M_2PI);
-    float reference_phase = acosf(reference_signal); // Extract phase from reference signal
-    
-    pll->phase_error = sinf(reference_phase - vco_divided_phase);
-    
-    pll->loop_filter = pll->loop_filter * (1.0f - pll->filter_coefficient) + 
-                       pll->phase_error * pll->filter_coefficient * pll->loop_gain;
-    
-    pll->vco_frequency = pll->target_frequency + pll->loop_filter;
-    
-    float phase_increment = (M_2PI * pll->vco_frequency) / pll->sample_rate;
-    pll->vco_phase = fmodf(pll->vco_phase + phase_increment, M_2PI * pll->multiplier);
-    
-    return sinf(pll->vco_phase);
 }

lib/filters.h

@@ -14,21 +14,4 @@ typedef struct
 void init_preemphasis(ResistorCapacitor *filter, float tau, float sample_rate);
 float apply_preemphasis(ResistorCapacitor *filter, float sample);
 
-float hard_clip(float sample, float threshold);
-
-typedef struct {
-    float phase_error;
-    float loop_filter;
-    float vco_phase;
-    float vco_frequency;
-
-    float reference_frequency;
-    float target_frequency;
-    float multiplier;
-    float sample_rate;
-    float loop_gain;
-    float filter_coefficient;
-} PLL;
-
-void init_pll(PLL *pll, float reference_frequency, float target_frequency, float sample_rate);
-float update_pll(PLL *pll, float reference_signal);
+float hard_clip(float sample, float threshold);