SDL Wiki
(This function is part of SDL_mixer, a separate library from SDL.)

Mix_FadeOutGroup

Halt a playing group of channels by arbitrary tag, after fading them out for a specified time.

Syntax

int Mix_FadeOutGroup(int tag, int ms);

Function Parameters

tag

an arbitrary value, assigned to channels, to search for.

ms

number of milliseconds to fade before halting the group.

Return Value

Returns the number of channels that were scheduled for fading.

Remarks

This will begin fading a group of channels with a specific tag from their current volumes to silence over ms milliseconds. After that time, those channels are halted.

A tag is an arbitary number that can be assigned to several mixer channels, to form groups of channels.

The default tag for a channel is -1.

Any halted channels will have any currently-registered effects deregistered, and will call any callback specified by Mix_ChannelFinished() once the halt occurs.

A fading channel will change it's volume progressively, as if Mix_Volume() was called on it (which is to say: you probably shouldn't call Mix_Volume() on a fading channel).

Note that this function does not block for the number of milliseconds requested; it just schedules the group to fade and notes the time for the mixer to manage later, and returns immediately.

Version

This function is available since SDL_mixer 2.0.0.


CategoryAPI


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