class PerceivedLevel
Defined at line 11 of file ../../sdk/lib/media/audio/cpp/perceived_level.h
Provides functions that map gain into a linear perceived level for UI.
Public Methods
float GainToLevel (float gain_db)Converts a gain in db to an audio 'level' in the range 0.0 to 1.0
inclusive. |gain_db| values of -60db or less yield level value 0.0.
|gain_db| values of 0db or more yield level value 1.0.
Defined at line 22 of file ../../sdk/lib/media/audio/cpp/perceived_level.cc
float LevelToGain (float level)Converts an audio 'level' in the range 0.0 to 1.0 inclusive to a gain
in db. |level| values of 0.0 or less yield gain value -160db. |level|
values slightly more than 0.0 yield gain values slightly more than
-60db. |level| values of 1.0 or more yield gain value 0.0db.
Defined at line 35 of file ../../sdk/lib/media/audio/cpp/perceived_level.cc
int GainToLevel (float gain_db, int max_level)Converts a gain in db to an audio 'level' in the range 0 to |max_level|
inclusive. |gain_db| values of -60db or less yield level value 0. |gain_db|
values of 0db or more yield level value |max_level|. |max_level| must be
at least 1.
Defined at line 48 of file ../../sdk/lib/media/audio/cpp/perceived_level.cc
float LevelToGain (int level, int max_level)Converts an audio 'level' in the range 0 to |max_level| inclusive to a
gain in db. |level| values of 0 or less yield gain value -160db. |level|
value 1 yields gain value 60 / |max_level| - 60. |level| values of
|max_level| or more yield gain value 0.0. |max_level| must be at least 1.
Defined at line 63 of file ../../sdk/lib/media/audio/cpp/perceived_level.cc