extern char *stat_item_values[NUM_STAT_ITEMS];
/** Data specific to the amplify filter. */
struct private_amp_data {
/** Points to the configuration data for this instance of this filter. */
extern char *stat_item_values[NUM_STAT_ITEMS];
/** Data specific to the amplify filter. */
struct private_amp_data {
/** Points to the configuration data for this instance of this filter. */