Don't overwrite pending port setting change if there are more than one port setting change event.

                // Don't notify clients if the output port settings change

                // wasn't of importance to them, i.e. it may be that just the

                // number of buffers has changed and nothing else.

                mOutputPortSettingsHaveChanged =

                    formatHasNotablyChanged(oldOutputFormat, mOutputFormat);

                bool formatChanged = formatHasNotablyChanged(oldOutputFormat, mOutputFormat);

                if (!mOutputPortSettingsHaveChanged) {

                    mOutputPortSettingsHaveChanged = formatChanged;

                }

                enablePortAsync(portIndex);