process_file.patch

diff --git a/matlab/updated_scripts/find_zc_indices_by_file.m b/matlab/updated_scripts/find_zc_indices_by_file.m
index 9858cc3..6adc765 100644
--- a/matlab/updated_scripts/find_zc_indices_by_file.m
+++ b/matlab/updated_scripts/find_zc_indices_by_file.m
@@ -33,7 +33,7 @@ function [zc_indices] = find_zc_indices_by_file(file_path, sample_rate, frequenc
     assert(isnumeric(chunk_size), "Chunk size must be numeric");
     assert(chunk_size > 0, "Chunk size must be > 0");
     assert(mod(length(varargin), 2) == 0, "Varargs length must be a multiple of 2");
-    
+
     sample_type = 'single';
     correlation_fig_num = -1;
 
@@ -128,14 +128,14 @@ function [zc_indices] = find_zc_indices_by_file(file_path, sample_rate, frequenc
     
     % Get the floating normalized correlation results
     abs_scores = abs(zc_scores).^2;
-    
+
     % Plot if requested
-    if (correlation_fig_num > 0)
-        figure(correlation_fig_num); 
-        plot(abs_scores);
-        title('Correlation Scores (normalized)')
-    end
-    
+    % if (correlation_fig_num > 0)
+    %    figure(correlation_fig_num);
+    %    plot(abs_scores);
+    %    title('Correlation Scores (normalized)')
+    % end
+
     % Find all places where the correlation result meets the specified threshold
     % This is going to find duplicates because there are very likely going to be two points right next to each other that
     % meet the required threshold.  This will be dealt with later
diff --git a/matlab/updated_scripts/process_file.m b/matlab/updated_scripts/process_file.m
index c454473..fc2bccf 100644
--- a/matlab/updated_scripts/process_file.m
+++ b/matlab/updated_scripts/process_file.m
@@ -9,16 +9,19 @@
 %   - Pass XOR'd bits from all other data symbols to a C++ program that removes the LTE and rate matching
 %   - Print out each frame in hex
 
+pkg load signal
+
 %% Path Info
-if (is_octave)
-  this_script_path = fileparts(mfilename('fullpath'));
-else
-  this_script_path = fileparts(matlab.desktop.editor.getActiveFilename);
-end
+%% if (is_octave)
+this_script_path = fileparts(mfilename('fullpath'));
+addpath(this_script_path);
+%% else
+%%   this_script_path = fileparts(matlab.desktop.editor.getActiveFilename);
+%% end
 
 % Create a directory to store the constellation plots for debugging
 % THIS CAN BE COMMENTED OUT IF NEEDED!!!  JUST MAKE SURE TO COMMENT OUT THE `saveas` CALL LATER AS WELL
-mkdir(fullfile(this_script_path, "images"));
+% mkdir(fullfile(this_script_path, "images"));
 
 turbo_decoder_path = fullfile(this_script_path, filesep, '..', filesep, '..', filesep, 'cpp', filesep, 'remove_turbo');
 if (~ isfile(turbo_decoder_path))
@@ -30,9 +33,10 @@ end
 enable_plots = 0; % Set to 0 to prevent the plots from popping up
 
 sample_type = 'single';
-file_path = '/opt/dji/collects/2437MHz_30.72MSPS.fc32';
-file_sample_rate = 30.72e6;
-file_freq_offset = 7.5e6; % This file was not recorded with the DroneID signal centered
+args = argv();
+file_path = args{1}; % '/opt/dji/collects/2437MHz_30.72MSPS.fc32';
+file_sample_rate = str2num(args{2}); % 30.72e6;
+file_freq_offset = str2num(args{3}); % 7.5e6; % This file was not recorded with the DroneID signal centered
 
 correlation_threshold = 0.7; % The SNR is pretty good, so using a high correlation score (must be between 0.0 and 1.0)
 chunk_size = 10e6;           % Number of samples to process at a time
@@ -183,7 +187,7 @@ for burst_idx=1:size(bursts, 1)
     
     % Save the constellation plots to disk for debugging
     % THIS CAN BE COMMENTED OUT IF NEEDED
-    saveas(gcf, sprintf('%s/images/ofdm_symbol_%d.png', this_script_path, burst_idx));
+    % saveas(gcf, sprintf('%s/images/ofdm_symbol_%d.png', this_script_path, burst_idx));
     
     % The remaining bits are descrambled using the same initial value, but more bits
     second_scrambler = generate_scrambler_seq(7200, scrambler_x2_init);
@@ -198,12 +202,12 @@ for burst_idx=1:size(bursts, 1)
     bits = bitxor(bits, second_scrambler);
 
     % Write the descrambled bits to disk as 8-bit integers
-    handle = fopen("/tmp/bits", "wb");
+    handle = fopen("/dev/shm/bits", "wb");
     fwrite(handle, bits, 'int8');
     fclose(handle);
 
     % Run the Turbo decoder and rate matcher
-    [retcode, out] = system(sprintf("%s %s", turbo_decoder_path, "/tmp/bits"));
+    [retcode, out] = system(sprintf("%s %s", turbo_decoder_path, "/dev/shm/bits"));
     if (retcode ~= 0)
         warning("Failed to run the final processing step");
     end
@@ -217,4 +221,4 @@ for idx=1:size(bursts, 1)
     frame = frames{idx};
 
     fprintf('FRAME: %s', frame);
-end
\ No newline at end of file
+end