agc agc\agc.cc agc\agc.h agc\agc_manager_direct.cc agc\agc_manager_direct.h agc\agc_manager_direct_unittest.cc agc\gain_map_internal.h agc\legacy agc\legacy\analog_agc.c agc\legacy\analog_agc.h agc\legacy\digital_agc.c agc\legacy\digital_agc.h agc\legacy\gain_control.h agc\loudness_histogram.cc agc\loudness_histogram.h agc\loudness_histogram_unittest.cc agc\mock_agc.h agc\utility.cc agc\utility.h