music loop stuff

//Please give credit if you use this code
//This code allows for music with a non-looping intro to be looped correctly
//To use, you need to split the song into 2 audio files containing the intro and the loop

//using
using Microsoft.Xna.Framework.Audio;

//before SetDefaults
        public int startMusic;
        public int loopMusic;
        public int loopCountMax = x; //the duration of the introduction in frames
        public int loopCountdown = x+16; //the countdown leading up to the switch from intro to loop - fadeout takes 16 frames
        public bool isLooping = false;
        public bool switchMusic = false; //use this to implement a phase 2 if desired
        public int startMusic2;
        public int loopMusic2;
        public int loopCountMax2 = y;
        public int loopCountdown2 = y+60; //fadeout takes 60 frames
        public bool isLooping2 = false;

//in SetDefaults
            startMusic = mod.GetSoundSlot(SoundType.Music, "Sounds/Music/Song1Intro");
            loopMusic = mod.GetSoundSlot(SoundType.Music, "Sounds/Music/Song1Loop");
            startMusic2 = mod.GetSoundSlot(SoundType.Music, "Sounds/Music/Song2Intro");
            loopMusic2 = mod.GetSoundSlot(SoundType.Music, "Sounds/Music/Song2Loop");
            music = startMusic;

//in AI
            if(!switchMusic)
            {
                if(loopCountdown >= loopCountMax)
                {
                    for (int m = 1; m < Main.music.Length; m++)
                    {
                        if (Main.music[m] != null && Main.music[m] != Main.music[startMusic] && Main.music[m].IsPlaying)
                        {
                            if(Main.musicFade[m] > 0f)
                            {
                                Main.musicFade[m] -= 0.0625f;
                            }
                            else if(Main.musicFade[m] <= 0f)
                            {
                                Main.music[m].Stop(AudioStopOptions.Immediate);
                                music = startMusic;
                                if(loopCountdown > loopCountMax) loopCountdown = loopCountMax;
                            }
                        }
                        else if (Main.music[m] == Main.music[startMusic]) Main.musicFade[m] = 1f;
                    }
                }

                if(loopCountdown == 0 && !isLooping)
                {
                    music = loopMusic;
                    for (int m = 1; m < Main.music.Length; m++)
                    {
                        if (Main.music[m] != null && Main.music[m] != Main.music[loopMusic] && Main.music[m].IsPlaying)
                        {
                            Main.music[m].Stop(AudioStopOptions.Immediate);
                        }
                        else if (Main.music[m] == Main.music[loopMusic]) Main.musicFade[m] = 1f;
                    }
                    isLooping = true;
                }

                if(loopCountdown > 0) loopCountdown--;
            }
            else
            {
                if(loopCountdown2 >= loopCountMax2)
                {
                    for (int m = 1; m < Main.music.Length; m++)
                    {
                        if (Main.music[m] != null && Main.music[m] != Main.music[startMusic2] && Main.music[m].IsPlaying)
                        {
                            if(Main.musicFade[m] > 0f)
                            {
                                Main.musicFade[m] -= 0.125f;
                                // Main.NewText("fading " + Main.musicFade[m], Color.Cyan.R, Color.Cyan.G, Color.Cyan.B);
                            }
                            else if(Main.musicFade[m] <= 0f)
                            {
                                Main.music[m].Stop(AudioStopOptions.Immediate);
                                music = startMusic2;
                                if(loopCountdown2 > loopCountMax2) loopCountdown2 = loopCountMax2;
                                // Main.NewText("startmusic2", Color.Cyan.R, Color.Cyan.G, Color.Cyan.B);
                            }
                        }
                        else if (Main.music[m] == Main.music[startMusic2]) Main.musicFade[m] = 1f;
                    }
                }

                if(loopCountdown2 == 0 && !isLooping2)
                {
                    music = loopMusic2;
                    for (int m = 1; m < Main.music.Length; m++)
                    {
                        if (Main.music[m] != null && Main.music[m] != Main.music[loopMusic2] && Main.music[m].IsPlaying)
                        {
                            Main.music[m].Stop(AudioStopOptions.Immediate);
                        }
                        else if (Main.music[m] == Main.music[loopMusic2]) Main.musicFade[m] = 1f;
                    }
                    isLooping2 = true;
                }

                if(loopCountdown2 > 0) loopCountdown2--;
            }