SDL_MixAudio

Use this function to mix audio data.

Syntax

void SDL_MixAudio(Uint8*       dst, 
                  const Uint8* src,
                  Uint32       len, 
                  int          volume)

Function Parameters

Code Examples

You can add your code example here

Remarks

This takes an audio buffer src of len bytes in the playing audio format and mixes it into dst, performing addition, volume adjustment, and overflow clipping.

Note that this does not change hardware volume.

This is provided for convenience -- you can mix your own audio data.

Do not use this function for mixing together more than two streams of sample data. The output from repeated application of this function may be distorted by clipping, because there is no accumulator with greater range than the input (not to mention this being an inefficient way of doing it). Use mixing functions from SDL_mixer, OpenAL, or write your own mixer instead.

It is a common misconception that this function is required to write audio data to an output stream in the audio-callback. While you can do that, SDL_MixAudio() is really only needed when you're mixing a single audio stream with a volume adjustment.

Related Functions

• SDL_MixAudioFormat

CategoryAPI, CategoryAudio