Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_GetAudioStreamGain - Get the gain of an audio stream.
HEADER FILE
Defined in SDL3/SDL_audio.h
SYNOPSIS
#include "SDL3/SDL.h" float SDL_GetAudioStreamGain(SDL_AudioStream *stream);
DESCRIPTION
The gain of a stream is its volume; a larger gain means a louder output, with a gain of zero being silence. Audio streams default to a gain of 1.0f (no change in output).
FUNCTION PARAMETERS
stream the SDL_AudioStream to query.
RETURN VALUE
Returns the gain of the stream or -1.0f on failure; call SDL_GetError () for more information.
THREAD SAFETY
It is safe to call this function from any thread, as it holds a stream-specific mutex while running.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
•(3), SDL_SetAudioStreamGain(3) Simple Directmedia Layer SDL 3.2.8 SDL_GetAudioStreamGain(3)