Added logic to make sure that all samples are present for each burst

This is to hopefully prevent negative index issues if the burst starts too early or too late in the file

matlab/updated_scripts/extract_bursts_from_file.m

@@ -45,10 +45,35 @@ function [bursts] = extract_bursts_from_file(input_path, sample_rate, frequency_
     for idx=1:length(indices)
         start_index = indices(idx);
         
-        % Back the start index off by the padding and take `burst_sample_count` samples
-        burst = read_complex_floats(input_path, start_index - padding - zc_seq_offset, burst_sample_count);
+        % Calculate when the burst will start and end
+        actual_start_index = start_index - padding - zc_seq_offset;
+        actual_end_index = actual_start_index + burst_sample_count;
         
+        % Ensure that all samples related to this burst are present in the recording
+        if (actual_start_index < 1)
+            warning("Skipping burst at offset %d as the beginning of the burst has been clipped", start_index);
+            continue
+        end
+        
+        if (actual_end_index > num_samples)
+            warning("Skipping burst at offset %d as the ending of the burst will be clipped", start_index);
+            continue
+        end
+        
+        % Again, concatenation is filthy, but necessary here since the actual number of bursts is unknown
+        valid_burst_indices = [valid_burst_indices actual_start_index];
+    end
+
+    % Now that the true number of bursts is known, create a buffer to hold everything
+    bursts = zeros(length(valid_burst_indices), burst_sample_count);
+
+    for idx=1:length(valid_burst_indices)
+        % Read in the current burst.  The starting index was calculated above
+        burst = read_complex_floats(input_path, valid_burst_indices(idx), burst_sample_count);
+        
+        % Adjust for the user-specified frequency offset that is present in the recording and save those samples off
         bursts(idx,:) = burst .* freq_offset_vec;
     end
+    
 end