make helper funcs inline; drop std::span for algo

1 files changed, 4 insertions, 4 deletions

diff --git a/examples/5_fir_differentiator.cpp b/examples/5_fir_differentiator.cpp
index 72415c6..1500dee 100644
--- a/examples/5_fir_differentiator.cpp
+++ b/examples/5_fir_differentiator.cpp
@@ -7,23 +7,23 @@
  * A scaling factor is applied so that the output's form is more clearly visible.
  */
 
-Sample *process_data(Samples samples)
+Sample* process_data(Samples samples)
 {
     constexpr int scaling_factor = 4;
-	static Sample output[samples.size()];
+    static Samples output;
     static Sample prev = 2048;
 
     // Compute the first output value using the saved sample.
     output[0] = 2048 + ((samples[0] - prev) * scaling_factor);
 
-	for (unsigned int i = 1; i < samples.size(); i++) {
+	for (unsigned int i = 1; i < SIZE; i++) {
         // Take the rate of change and scale it.
         // 2048 is added as the output should be centered in the voltage range.
 		output[i] = 2048 + ((samples[i] - samples[i - 1]) * scaling_factor);
     }
 
 	// Save the last sample for the next iteration.
-    prev = samples[samples.size() - 1];
+    prev = samples[SIZE - 1];
 
     return output;
 }