Find the "oldest" sample playing in a group of channels.
int Mix_GroupOldest(int tag);
|tag||an arbitrary value, assigned to channels, to search through.|
Returns the "oldest" sample playing in a group of channels
Specifically, this function returns the channel number that is assigned the specified tag, is currently playing, and has the lowest start time, based on the value of SDL_GetTicks() when the channel started playing.
If no channel with this tag is currently playing, this function returns -1.
This function is available since SDL_mixer 2.0.0.