Tools: Tune: dcblock: Fixes for Matlab compatibility

The script can be run in both Matlab and Octave with these
changes.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

tools/tune/dcblock/dcblock_build_blob.m

@@ -1,16 +1,15 @@
 function blob8 = dcblock_build_blob(R_coeffs, endian, ipc_ver)
 
 %% Settings
-bits_R = 32; %Q2.30
 qy_R = 30;
 
 if nargin < 2
- endian = 'little'
-endif
+ endian = 'little';
+end
 
 if nargin < 3
  ipc_ver = 3;
-endif
+end
 
 %% Shift values for little/big endian
 switch lower(endian)
@@ -44,7 +43,7 @@
  j=j+4;
 end
 
-endfunction
+end
 
 function bytes = word2byte(word, sh)
 bytes = uint8(zeros(1,4));

tools/tune/dcblock/dcblock_plot_stepfn.m

@@ -1,4 +1,4 @@
-function dcblock_plot_stepfn(R, fs);
+function dcblock_plot_stepfn(R, fs)
 % Plot the step response of a DC Blocking Filter
 % For a DC Blocking filter: H(z) = (1-1/z)/(1 - R/z)
 % Therefore the coefficients are b = [1 -1], a = [1 -R]
@@ -13,4 +13,4 @@
 tstr = sprintf("DC Blocking Filter Step Response, R = %i", R);
 title(tstr);
 
-endfunction
+end

tools/tune/dcblock/dcblock_plot_transferfn.m

@@ -1,4 +1,4 @@
-function dcblock_plot_transferfn(R, fs);
+function dcblock_plot_transferfn(R, fs)
 % Plot the transfer function.
 % For a DC Blocking filter: H(z) = (1-1/z)/(1 - R/z)
 % Therefore the coefficients are b = [1 -1], a = [1 -R]
@@ -14,4 +14,4 @@
 tstr = sprintf("DC Blocking Filter Frequency Response, R = %i", R);
 title(tstr);
 
-endfunction
+end

tools/tune/dcblock/example_dcblock.m

@@ -1,13 +1,13 @@
-function example_dcblock();
+function example_dcblock()
 
 % Set the parameters here
-tplg1_fn = "../../topology/topology1/m4/dcblock_coef_default.m4" % Control Bytes File
-tplg2_fn = "../../topology/topology2/include/components/dcblock/default.conf"
+tplg1_fn = "../../topology/topology1/m4/dcblock_coef_default.m4"; % Control Bytes File
+tplg2_fn = "../../topology/topology2/include/components/dcblock/default.conf";
 % Use those files with sof-ctl to update the component's configuration
-blob3_fn = "../../ctl/ipc3/dcblock_coef.blob" % Blob binary file
-alsa3_fn = "../../ctl/ipc3/dcblock_coef.txt" % ALSA CSV format file
-blob4_fn = "../../ctl/ipc4/dcblock_coef.blob" % Blob binary file
-alsa4_fn = "../../ctl/ipc4/dcblock_coef.txt" % ALSA CSV format file
+blob3_fn = "../../ctl/ipc3/dcblock_coef.blob"; % Blob binary file
+alsa3_fn = "../../ctl/ipc3/dcblock_coef.txt"; % ALSA CSV format file
+blob4_fn = "../../ctl/ipc4/dcblock_coef.blob"; % Blob binary file
+alsa4_fn = "../../ctl/ipc4/dcblock_coef.txt"; % ALSA CSV format file
 
 endian = "little";
 R_coeffs = [0.98, 0.98, 0.98, 0.98, 0.98, 0.98, 0.98, 0.98];
@@ -28,11 +28,11 @@
 
 % Plot Filter's Transfer Function and Step Response
 % As an example, plot the graphs of the first coefficient
-fs = 48e3
+fs = 48e3;
 dcblock_plot_transferfn(R_coeffs(1), fs);
 figure
 dcblock_plot_stepfn(R_coeffs(1), fs);
 
 rmpath ./../common
 
-endfunction
+end