MIX_SetTrac...tChannelMap(3)

✨ MIX_SetTrackOutputChannelMap(3) ✨

okay bestie, welcome to the SDL_mixer3 FUNCTIONS corner of the manual, where we're talking about MIX_SetTrackOutputChannelMap and honestly? it's giving channel remapping realness. let's get into it 💅

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🌸 NAME 🌸

MIX_SetTrackOutputChannelMap — set the current output channel map of a track. yes that's the whole name, it's a long one, we love her anyway 🫶

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🎀 SYNOPSIS 🎀

#include <SDL3_mixer/SDL_mixer.h>

bool MIX_SetTrackOutputChannelMap(MIX_Track *track, const int *chmap, int count);

look at that signature. iconic. no cap. ✨

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💖 DESCRIPTION 💖

so first things first: channel maps are optional. like, completely optional. most things do not need them at all — you just pass your data in the order that SDL expects and you go about your day. no thoughts, head empty, vibes immaculate. 🦋

the output channel map reorders your track data after transformations and before it gets mixed into a mixer group. so what's it even for? reversing stereo channels, for example. that's the classic use case. lowkey very useful ngl. 😌

here's how the array works, bestie, pay attention:

• each item in the array represents an input channel
• its value is the channel that it should be remapped to

so to reverse a stereo signal's left and right values, you'd have an array of { 1, 0 }. simple as that. 💫

and it is legal to remap multiple channels to the same thing, so { 1, 1 } would duplicate the right channel to both channels of a stereo signal. doubling up, periodt.

if an element in the channel map is set to -1 instead of a valid channel, that channel gets muted — it's set to a silence value. so that's how you kill a channel. 💀

You cannot change the number of channels through a channel map, just reorder/mute them.

tracks default to no remapping applied. and passing a NULL channel map is totally legal — it turns remapping off. so if you ever need to un-remap, that's your move. 🌈

one more thing: SDL_mixer will copy the channel map. the caller does not have to save this array after this call. so you can let it go, babe, it's safe. release it into the wild. 🧚

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🌟 FUNCTION PARAMETERS 🌟

• track — the track to change. that's the one you're messing with. 💜
• chmap — the new channel map, NULL to reset to default. 📋
• count — the number of channels in the map. 🔢

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⭐ RETURN VALUE ⭐

returns true on success or false on failure. and if it flops? call SDL_GetError() for more information. she'll tell you what went wrong, i promise. 😭

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🔥 THREAD SAFETY 🔥

it is safe to call this function from any thread. yes bestie, any thread. go wild. 👑

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💅 AVAILABILITY 💅

this function is available since SDL_mixer 3.0.0. so if you're on anything older, sorry babe, no channel maps for you. 🙈

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and that's the whole page!! 🍓 mwah. this gem is brought to you by SDL_mixer, version 3.2.4, and it's the manual for MIX_SetTrac...tChannelMap(3). bye bestie, go remap something cute 💖✨🎀