// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Two-source crossfade controller
// Not compiled or tested in-world
// Setup: Name root audio_mixer and put this script there. Pair with Crossfade source receiver in two children named audio_a and audio_b; set FACE.
// Stop / restore: Hold the root for at least two seconds to send Stop to both sources. Then remove if finished.
// Notes: Use licensed inventory sounds in the specified prim. Audio is nearby, not private. Simulator timers and viewer loading are approximate. A short touch sets an A/B mix; a held touch sends Stop. Receiver sound assets belong in their own prims.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Not compiled or tested in-world.
integer FACE=0;
float pressed;
default
{
    touch_start(integer n)
    {
        if(llDetectedKey(0)==llGetOwner())pressed=llGetTime();
    }
    touch_end(integer n)
    {
        if(llDetectedKey(0)!=llGetOwner()||llGetLinkNumber()>1)return;
        if(llGetTime()-pressed>=2.0)
        {
            llMessageLinked(LINK_ALL_CHILDREN,7910,"stop",NULL_KEY);
            return;
        }
        if(llDetectedTouchFace(0)!=FACE)return;
        vector st=llDetectedTouchST(0);
        if(st.x<0.0||st.x>1.0)return;
        llMessageLinked(LINK_ALL_CHILDREN,7910,(string)st.x,NULL_KEY);
    }
}