Return a pitch of 0 if the acf norm threshold was not reached

src/lib.rs

@@ -6,12 +6,12 @@ pub mod pitch_extractor;
 use pitch_extractor::{PitchExtractor, YinPitchExtractor};
 
 pub const CHANNELS: usize = 1;
-pub const RMS_THRESHOLD: f32 = 0.02;
+pub const RMS_THRESHOLD: f32 = 0.03;
 
 // TODO(kgreenek): Set these values at run-time as parameters independent of the sample rate.
 // Reasonable values for a sample rate of 16khz.
-const WINDOW_SIZE: usize = 100;
-const PITCH_MAX_T: usize = 150;
+pub const WINDOW_SIZE: usize = 100;
+pub const PITCH_MAX_T: usize = 150;
 // Reasonable values for a sample rate of 44.1khz.
 //pub const WINDOW_SIZE: usize = 256;
 //pub const PITCH_MAX_T: usize = 1024;

src/pitch_extractor.rs

@@ -116,17 +116,12 @@ where
         self.update_acf_norm();
         for channel in 0..F::n_channels() {
             self.pitch[channel] = 0;
-            let mut acf_norm_min_value = *self.acf_norm[0].channel(channel).unwrap();
             for (frame_index, &acf_norm_frame) in self.acf_norm[..].iter().enumerate() {
                 let acf_norm_sample = acf_norm_frame.channel(channel).unwrap();
                 if *acf_norm_sample < 0.1.to_sample() {
                     self.pitch[channel] = frame_index;
                     break;
                 }
-                if *acf_norm_sample < acf_norm_min_value {
-                    acf_norm_min_value = *acf_norm_sample;
-                    self.pitch[channel] = frame_index;
-                }
             }
         }
         self.pitch()