SOUNDMANAGER ( FMOD)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using FMOD;
namespace Mehdi_Media_Player
{
    static class SoundManager
    {
        #region Fields
        
        private static FMOD.System system = null;

        private static Sound music = null;
        
        private static string currentPath;
        private static Channel Channel = null;
      
        public delegate void EndMusicEventHandler(object sender, EventArgs e);
        public delegate void ErrorEventHandler(RESULT result);

        private static CHANNEL_CALLBACK channelCallback;
        public static event EndMusicEventHandler EndMusic;
        public static event ErrorEventHandler EngineError;
    
        #endregion
        #region Properties

        public static string CurrentPath
        {
            get { return currentPath; }
            set { currentPath = value; }
        }
        public static Sound Music
        {
            get { return music;}
        }
        #endregion

        #region Init-UpDate-Release
       
        public static void Initialize(int NbChannel)
        {
            RESULT result;
                   
            result = Factory.System_Create(ref system);
            if(EngineError!=null)EngineError(result);
            
            uint version = 0;
            
            result = system.getVersion(ref version);
            if(EngineError!=null)EngineError(result);

            if (version < VERSION.number)
            {
                throw new ApplicationException("Error! You are using an old version of FMOD " + version.ToString("X") + ". This program requires " + VERSION.number.ToString("X") + ".");
            }
          
            result = system.init(NbChannel, INITFLAG.NORMAL, (IntPtr)null);
            if(EngineError!=null)EngineError(result);           
            channelCallback = new CHANNEL_CALLBACK(OnEndMusic);

        }
        public static void Update()
        {
           RESULT result= system.update();
           if (EngineError != null) EngineError(result);
        }
        public static void Release()
        {
            RESULT result= RESULT.OK;
            if (music != null)
            {
                result = music.release();
               if (EngineError != null) EngineError(result);
            }
            if(system!=null)
            result = system.release();
            if (EngineError != null) EngineError(result);
        }

        #endregion
        #region MainFunctions
        #region Play Functions

        public static void Play()
        {
            Play(currentPath);
        }
        public static void Play(string path)
        {
            Play(path, false);
        }
        public static void Play(string path, bool paused)
        {
            bool isPlaying = false;
            RESULT result= RESULT.OK;

            if (Channel != null)
            {
                //si la musique existe
                result = Channel.isPlaying(ref isPlaying);
            }
            else
            {
                isPlaying = false;
            }

            if (EngineError != null) EngineError(result);

            if ((currentPath == path) && isPlaying)//si la musique du chemin courant est entrain detre joué
            {
                return;
            }
            else if (currentPath == path)//sinon la musique du chemin courant nest pas entrain detre joué
            {
                result = system.playSound(CHANNELINDEX.FREE, music, false, ref Channel);
                if(EngineError!=null)EngineError(result);
                if(Channel!=null)
                   result= Channel.setCallback(FMOD.CHANNEL_CALLBACKTYPE.END, channelCallback, 0);
                if (EngineError != null) EngineError(result);
            }
            else
            {
                
                //si cest une nouvelle musique
                if (music != null)
                {

                    if (Channel != null)
                    {
                        Channel.stop();
                        Channel = null;
                    }
                    
                    result = music.release();
                    music = null;
                    if(EngineError!=null)EngineError(result);
                }
                
                result = system.createStream(path, MODE.SOFTWARE | MODE.CREATECOMPRESSEDSAMPLE | MODE.LOOP_OFF, ref music);
                if(EngineError!=null)EngineError(result);

                result = system.playSound(CHANNELINDEX.FREE, music, paused, ref Channel);
                if(EngineError!=null)EngineError(result);
                if (Channel != null)
                    result = Channel.setCallback(FMOD.CHANNEL_CALLBACKTYPE.END, channelCallback, 0);
                if (EngineError != null) EngineError(result);
                currentPath = path;
            }
        }
        #endregion
        #region Stop Functions
        public static void Stop()
        {
            if (Channel != null)
            {
                RESULT result = Channel.stop();
                Channel = null;
                if(EngineError!=null)EngineError(result);
            }
        }
        #endregion
        #region Pause Functions

        public static bool GetPaused()
        {
            bool pause = false;
            if (Channel != null)
            {
                RESULT result = Channel.getPaused(ref pause);
                if(EngineError!=null)EngineError(result);
            }
            return pause;
        }
        public static void SetPaused(bool stat)
        {
            if (Channel != null)
            {
                RESULT result = Channel.setPaused(stat);
                if(EngineError!=null)EngineError(result);
            }
        }
        public static void SetPaused()
        {
            bool paused = false;
            if (Channel != null)
            {
                RESULT result = Channel.getPaused(ref paused);
                if(EngineError!=null)EngineError(result);
                result = Channel.setPaused(!paused);
                if(EngineError!=null)EngineError(result);
            }
        }

        #endregion
        #region Volume Functions
        public static void SetMute()
        {
            bool mute = false;
            if (Channel != null)
            {
                RESULT result = Channel.getMute(ref mute);
                if(EngineError!=null)EngineError(result);
                result = Channel.setMute(!mute);
                if(EngineError!=null)EngineError(result);
            }
        }
        public static void SetMute(bool value)
        {
            if (Channel != null)
            {
                RESULT result = Channel.setMute(value);
                if(EngineError!=null)EngineError(result);
            }
        }
        public static bool GetMute()
        {
            bool mute = false;
            if (Channel != null)
            {
                RESULT result = Channel.getMute(ref mute);
                if(EngineError!=null)EngineError(result);
            }
            return mute;
        }
        public static float GetVolume()
        {
            float vol = 1.0f;
           
                if (Channel != null)
                {
                    RESULT result = Channel.getVolume(ref vol);
                    if (EngineError != null) EngineError(result);
                }
            return vol;
        }
        public static void SetVolume(float Value)
        {
            Value = Math.Abs(Value);
            if (Channel != null)
            {
                RESULT result = Channel.setVolume(Value);
                if (EngineError != null) EngineError(result);
            }
        }
        #endregion
        #region Frequence Functions

        public static float GetFrequency()
        {
            float frq = 0;
            if (Channel != null)
            {
                RESULT result = Channel.getFrequency(ref frq);
                if (EngineError != null) EngineError(result);
            }
            return ((frq * 100.0f) / 48000);
        }
        public static void SetFrequency(float freq)
        {
            if (Channel != null)
            {
                RESULT result = Channel.setFrequency(freq * 48000 / 100.0f);
                if(EngineError!=null)EngineError(result);
            }
        }

        #endregion
        #region Position Functions

        public static void SetPosition(uint pos)
        {
            uint ln = 0;
            if (music != null) music.getLength(ref ln, TIMEUNIT.MS);
            pos = (ln * pos / 100);
            if (Channel != null)
            {
                RESULT result = Channel.setPosition(pos, TIMEUNIT.MS);
                if(EngineError!=null)EngineError(result);
            }
        }
        public static uint GetPosition()
        {
            uint ln = 0;
            uint ms = 0;
            if (music != null)
            {
                RESULT result = music.getLength(ref ln, TIMEUNIT.MS);
                if (EngineError != null) EngineError(result);
                ms = GetMsPosition();
                ms = (100 * ms / ln);
            }
            else
                ms = 0;
            return ms;
        }
        public static void SetMsPosition(uint ms)
        {
            if (Channel != null)
            {
                RESULT result = Channel.setPosition(ms, TIMEUNIT.MS);
                if(EngineError!=null)EngineError(result);
            }
        }
        public static uint GetMsPosition()
        {
            uint ms = 0;
            if (Channel != null)
            {
                RESULT result = Channel.getPosition(ref ms, TIMEUNIT.MS);
                if(EngineError!=null)EngineError(result);
            }
            return ms;
        }
        public static uint GetLength()
        {
            uint ln = 0;
            if (music != null) music.getLength(ref ln, TIMEUNIT.MS);
            return ln;
        }

        #endregion
        #endregion
        #region Event Functions
        private static RESULT OnEndMusic(IntPtr channelraw, FMOD.CHANNEL_CALLBACKTYPE type, int command, uint commanddata1, uint commanddata2)
        {
            Channel = null;// en premier pour ne pas avoir erreur lors d'un MessageBox :) ; cas particulier
            if (EndMusic != null)
                EndMusic(currentPath, new EventArgs());
            
            return RESULT.OK;
        }
        #endregion
        #region Error Functions

        public static void ShowErrorException(RESULT result)
        {
            if (result != RESULT.OK)
            {
                throw new ApplicationException("Sound Manager Error! " + result + " - " + Error.String(result));
            }
        }

        public static void ShowErrorDialogBox(RESULT result, string AppName)
        {
            if (result != RESULT.OK)
            {
                System.Windows.Forms.MessageBox.Show("Sound Manager Error! " + result + " - " + Error.String(result), AppName, System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);
            }
        }

        #endregion
        #region Other Functions

        public static bool IsPlaying()
        {
            bool ply = false;
            if (Channel != null)
            {
                RESULT result = Channel.isPlaying(ref ply);
                if(EngineError!=null)EngineError(result);
            }
            return ply;
        }

        #endregion
    }
}