Fun with Sound

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace MCIDEMO

{   

    public partial class Form1 : Form
    {
        internal class ListItem
        {
            string _filename = "";

            public string Filename
            {
                get { return _filename; }
                set { _filename = value; }
            }
            string _alias = "";

            public string Alias
            {
                get { return _alias; }
                set { _alias = value; }
            }

            public ListItem(string filename, string alias)
            {
                _filename = filename;
                _alias = alias;
            }

            public override string ToString()
            {
                return _filename;
            }
        }


        static int nextnum=0;
        public const int MM_MCINOTIFY = 953;
        Form2 f2;


        public Form1()
        {
            InitializeComponent();
        }

        private bool IsAnsiName(string s)
        {
            UnicodeEncoding u = new UnicodeEncoding();
            byte[] b=u.GetBytes(s);
            for (int i = 1; i < b.Length; i += 2)
            {
                if (b[i] != 0) return false;
            }

            return true;
        }

        private string getAliasFromFileName(string s)
        {
            if (s == "") return "";
            string s1 = s.Replace(' ', '_');
            return s1;
        }

        private MciPlayer CreateMCIPlayer(string filename, ref string alias)
        {
            bool isansiname = this.IsAnsiName(filename);

            MciPlayer m = null;
            if (isansiname)
            {
                alias = getAliasFromFileName(filename);
                m = new MciPlayer(Application.StartupPath + @"\" + filename, getAliasFromFileName(filename));

            }
            else
            {
                nextnum++;
                string ext = filename.Substring(filename.Length - 4);
                string relocatedfile = Application.StartupPath + "\\unicodenamesupport\\" + nextnum + ext;
                if (System.IO.File.Exists(relocatedfile))
                    System.IO.File.Delete(relocatedfile);
                System.IO.File.Copy(Application.StartupPath + @"\" + filename, relocatedfile);
                alias = nextnum + "";
                m = new MciPlayer(relocatedfile, nextnum + "");
            }
            return m;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex < 0) return;
           
            ListItem itm=(ListItem)listBox1.SelectedItem;
            string filename = itm.ToString();
            bool isansiname = this.IsAnsiName(filename);
      
            if (f2.Tag == null)
            {
                string alias = "";
                 MciPlayer m = CreateMCIPlayer(filename,ref alias);
                 itm.Alias = alias;
                f2.Tag = filename;
                m.PlayFromStart(f2.Handle);
            }
            else
            {
                MessageBox.Show("Notifer is busy. Please try again!");
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            f2 = new Form2();
            f2.Left = this.Left + this.Width;
            f2.Top = this.Top;
            f2.Show();

            string apppath = Application.StartupPath;
            var files_mp3=System.IO.Directory.GetFiles(apppath,"*.mp3");
            var files_wav = System.IO.Directory.GetFiles(apppath, "*.wav");
            var files = new string[files_mp3.Length  + files_wav.Length];
            files_mp3.CopyTo(files, 0);
            files_wav.CopyTo(files, files_mp3.Length);
            foreach( var s in files)
            {
                var s1 = s.Substring(apppath.Length + 1);

                ListItem itm= new ListItem(s1, "");
                listBox1.Items.Add(itm);
            }

            if(!System.IO.Directory.Exists(apppath +"\\unicodenamesupport"))
                System.IO.Directory.CreateDirectory(apppath +"\\unicodenamesupport");          

        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex < 0) return;

            ListItem itm = (ListItem)listBox1.SelectedItem;
            string filename = (itm).ToString();
            string alias = "";
            MciPlayer m = CreateMCIPlayer(filename, ref alias); 
            itm.Alias=alias;
            m.PlayFromStart();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex < 0) return;
            ListItem itm = (ListItem)listBox1.SelectedItem;
            string filename = (itm).ToString();
            if (filename.LastIndexOf(".wav") == filename.Length - 4)
            {
                MessageBox.Show("Repeat play for .wav file not supported");
                return;
            }
            string alias = "";
  
            MciPlayer m = CreateMCIPlayer(filename,ref alias); 
            itm.Alias = alias;
            m.PlayLoop();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedIndex < 0) return;
            ListItem itm = (ListItem)listBox1.SelectedItem;
            string filename = itm.ToString();
            MciPlayer m = new MciPlayer();
            m.Alias = itm.Alias;//getAliasFromFileName(filename);
            if(m.Alias !="")
               m.StopPlaying();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            foreach (ListItem itm in listBox1.Items)
            {
                string filename = itm.ToString();
                MciPlayer m = new MciPlayer();
                m.Alias = itm.Alias;//getAliasFromFileName(filename);
                if(m.Alias !="")
                   m.StopPlaying();
            }
        }
    }
   

}