Flush sampels received during startup and transmission

During transmission, the buffer is being filled with data received. However the concept of walkie talkie is that it is not being buffered, as it creates problems.

Author: FedericoBusero

src/Application.cpp

@@ -99,6 +99,8 @@ void Application::begin()
   pinMode(GPIO_TRANSMIT_BUTTON, INPUT_PULLDOWN);
   // start off with i2S output running
   m_output->start(SAMPLE_RATE);
+  // flush all samples received during startup
+  m_output_buffer->flush();
   // start the main task for the application
   TaskHandle_t task_handle;
   xTaskCreate(application_task, "application_task", 8192, this, 1, &task_handle);
@@ -132,7 +134,10 @@ void Application::loop()
           m_transport->add_sample(samples[i]);
         }
       }
+      // send all packets still in the transport buffer
       m_transport->flush();
+      // throw away all packets that have been received during transmission
+      m_output_buffer->flush();
       // finished transmitting stop the input and start the output
       Serial.println("Finished transmitting");
       m_indicator_led->set_is_flashing(false, 0xff0000);