[−][src]Function fermium::audio::SDL_GetNumAudioDevices
pub unsafe extern "C" fn SDL_GetNumAudioDevices(iscapture: c_int) -> c_int
Get the number of available devices exposed by the current driver.
Only valid after a successfully initializing the audio subsystem.
Returns -1 if an explicit list of devices can't be determined; this is
not an error. For example, if SDL is set up to talk to a remote audio
server, it can't list every one available on the Internet, but it will
still allow a specific host to be specified to SDL_OpenAudioDevice
.
In many common cases, when this function returns a value <= 0, it can
still successfully open the default device (NULL for first argument of
SDL_OpenAudioDevice
).