Get the gain of an audio device.
Defined in <SDL3/SDL_audio.h>
float SDL_GetAudioDeviceGain(SDL_AudioDeviceID devid);
SDL_AudioDeviceID | devid | the audio device to query. |
(float) Returns the gain of the device or -1.0f on failure; call SDL_GetError() for more information.
The gain of a device is its volume; a larger gain means a louder output, with a gain of zero being silence.
Audio devices default to a gain of 1.0f (no change in output).
Physical devices may not have their gain changed, only logical devices, and this function will always return -1.0f when used on physical devices.
It is safe to call this function from any thread.
This function is available since SDL 3.0.0.