Constant libpulse_binding::stream::flags::RELATIVE_VOLUME

pub const RELATIVE_VOLUME: FlagSet = capi::PA_STREAM_RELATIVE_VOLUME; // 262_144u32

If a volume is passed when this stream is created, consider it relative to the sink’s current volume, never as absolute device volume. If this is not specified the volume will be consider absolute when the sink is in flat volume mode, relative otherwise.