basic freeze

Source/Shifter.h

@@ -158,17 +158,22 @@ public:
 	float getOutputPitch() const { return sample_rate_ / out_period; }
     void SetHarmonyMix(float mix);
 	void SetAutoTuneEnable(bool enable) { enable_autotune = enable; }
+    void SetFreeze(bool);
 
     float out_midi = 40;
     ShifterVoice voices[MAX_VOICES];
+    ShifterVoice freeze_voices[MAX_VOICES];
 
 private:
     void DetectPitch(const float* const* in, float** out, size_t size);
     void SetRates();
     void GetSamples(float** output, const float* input, size_t size); 
     float GetOutputEnvelopePeriod(int out_voice);
+	float GetOutputEnvelopePeriodFreeze(int freeze_voice);
     int GetPeakIndex();
     void AddInterpolatedFrame(int voice, int max_index, float period_to_use);
+    void AddFreezeToOutput(int voice, float resampling_period);
+    void CopyInputToFreezeBuffer(int);
 
     Helmholtz helm;
     // GranularSustain player;
@@ -189,6 +194,7 @@ private:
     bool pitch_trigger = false;
 	float harmony_mix = 0.0f;
 	float melody_mix = 0.0f;
+    bool freeze_needs_copy;
 
     int trigger_bank;
 
@@ -206,13 +212,14 @@ private:
     float last_freqs[3];
     float in_buffer[BUFFER_SIZE];
     float out_buffer[2][BUFFER_SIZE];
+	float freeze_buffer[BUFFER_SIZE];
     int out_playhead = 0;
     int in_playhead = 0;
 	int last_autotune_midi = -1;
 
 	float out_period_filter_amount = 0.7f; // You can expose this as a parameter
 
-	
+	bool freeze_mode = false;
     
     float out_period = 0; //C3
     float in_period = 366.936;
@@ -221,6 +228,8 @@ private:
     float sample_rate_;
     int blocksize;
 	bool enable_autotune = false;
+    float freeze_period;
+    float freeze_volume = 1;
     MidiPitchSmoother out_midi_smoother;
 };
 #endif