分类 Unity 下的文章

using UnityEngine;
using System.Collections;
using Id3Lib;
using NAudio.Wave;
using System.IO;
using System;
using System.Text;
using System.Runtime.InteropServices;
public class MusicPlayer : MonoBehaviour
{ 
 
    private IWavePlayer iwavePlayer;
    private WaveStream waveStream;
    private WaveChannel32 waveChannel32;
    Texture2D t;
    string path=""; 
    // Use this for initialization
    void Start()
    {
        
    }
 
    void LoadMusic(string path)
    { 
        byte[] imageData;
        using (FileStream fsRead = new FileStream(path, FileMode.Open))
        {
            int fsLen = (int)fsRead.Length;
            imageData = new byte[fsLen];
            fsRead.Read(imageData, 0, imageData.Length);
        }
        LoadAudioFromData(imageData);
        t = GetAlbumCover(path);
    }
 
    private bool LoadAudioFromData(byte[] data)
    {
        try
        {
            MemoryStream tmpStr = new MemoryStream(data);
            waveStream = new Mp3FileReader(tmpStr); 
            waveChannel32 = new WaveChannel32(waveStream);
 
            iwavePlayer = new WaveOut();
            iwavePlayer.Init(waveChannel32);
            return true;
        }
        catch (System.Exception ex)
        {
            Debug.LogWarning("Error! " + ex.Message);
        }
        return false;
    }
 
    // Update is called once per frame
    void Update()
    {
 
    }
 
 
    void OnGUI()
    {
        if (GUI.Button(new Rect(0, 0, 120, 30), "选择音乐"))
        {
            OpenFileName ofn = new OpenFileName();
 
            ofn.structSize = Marshal.SizeOf(ofn);
              
            ofn.filter = "mp3(*.mp3)\0*.mp3";
 
            ofn.file = new string(new char[256]);
 
            ofn.maxFile = ofn.file.Length;
 
            ofn.fileTitle = new string(new char[64]);
 
            ofn.maxFileTitle = ofn.fileTitle.Length;
 
            ofn.initialDir = UnityEngine.Application.dataPath;//默认路径  
 
            ofn.title = "选择音乐";
 
            ofn.defExt = "mp3";//显示文件的类型  
            //注意 一下项目不一定要全选 但是0x00000008项不要缺少  
            ofn.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;//OFN_EXPLORER|OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST| OFN_ALLOWMULTISELECT|OFN_NOCHANGEDIR  
 
            if (WindowDll.GetOpenFileName(ofn))
            {
                Debug.Log("Selected file with full path: {0}" + ofn.file);
                LoadMusic(ofn.file);
                path = ofn.file;
            }
            ofn = null;
            Resources.UnloadUnusedAssets();
        }
        if(GUI.Button(new Rect(0,30,120,30),"播放"))
        {
            iwavePlayer.Play();
        }
        if (GUI.Button(new Rect(0, 60, 120, 30), "暂停"))
        {
            iwavePlayer.Pause();
        }
        if (GUI.Button(new Rect(0, 90, 120, 30), "停止"))
        {
            iwavePlayer.Stop(); 
        }
        GUI.Label(new Rect(200, 170, 500, 30), path);
        if(t!=null)
        {
            GUI.DrawTexture(new Rect(200, 200, 200, 200), t);
        }
    }
 
    void OnApplicationQuit()
    {
        if (iwavePlayer!=null)
        {
            iwavePlayer.Dispose();
        }
    }
    /// <summary>
    /// 获取音乐封面
    /// </summary>
    /// <param name="path"></param>
    /// <returns></returns>
    public Texture2D GetAlbumCover(string path)
    {
        Texture2D image = null;
        FileStream fs = new FileStream(path, FileMode.Open);
        try
        {
            byte[] header = new byte[10]; //标签头
            int offset = 0;
            bool haveAPIC = false;
            fs.Read(header, 0, 10);
            offset += 10;
            string head = Encoding.Default.GetString(header, 0, 3);
 
            if (head.Equals("ID3"))
            {
                int sizeAll = header[6] * 0x200000 //获取该标签的尺寸,不包括标签头
                + header[7] * 0x4000
                + header[8] * 0x80
                + header[9];
                int size = 0;
                byte[] body = new byte[10]; //数据帧头,这里认为数据帧头不包括编码方式
                fs.Read(body, 0, 10);
                offset += 10;
                head = Encoding.Default.GetString(body, 0, 4);
                while (offset < sizeAll) //当数据帧不是图片的时候继续查找
                {
                    if (("APIC".Equals(head))) { haveAPIC = true; break; }
                    size = body[size + 4] * 0x1000000 //获取该数据帧的尺寸(不包括帧头)
                    + body[size + 5] * 0x10000
                    + body[size + 6] * 0x100
                    + body[size + 7];
                    body = new byte[size + 10];
                    fs.Read(body, 0, size + 10);
                    offset += size + 10;
                    head = Encoding.Default.GetString(body, size, 4);
                }
                if (haveAPIC)
                {
                    size = body[size + 4] * 0x1000000
                    + body[size + 5] * 0x10000
                    + body[size + 6] * 0x100
                    + body[size + 7];
                    byte[] temp = new byte[9];
                    byte[] temptype = new byte[10];
                    fs.Seek(1, SeekOrigin.Current);
                    fs.Read(temp, 0, 9);
                    int i = 0;
                    switch (Encoding.Default.GetString(temp))
                    {
                        case "image/jpe":
 
                            while (i < size) //jpeg开头0xFFD8
                            {
                                if (temptype[0] == 0 && temptype[1] == 255 && temptype[2] == 216)
                                {
                                    break;
                                }
                                fs.Seek(-2, SeekOrigin.Current);
                                fs.Read(temptype, 0, 3);
                                i++;
                            }
                            fs.Seek(-2, SeekOrigin.Current);
                            break;
                        case "image/jpg":
 
                            while (i < size) //jpg开头0xFFD8
                            {
                                if (temptype[0] == 0 && temptype[1] == 255 && temptype[2] == 216)
                                {
                                    break;
                                }
                                fs.Seek(-2, SeekOrigin.Current);
                                fs.Read(temptype, 0, 3);
                                i++;
                            }
                            fs.Seek(-2, SeekOrigin.Current);
                            break;
                        case "image/gif":
 
                            while (i < size) //gif开头474946
                            {
                                if (temptype[0] == 71 && temptype[1] == 73 && temptype[2] == 70)
                                {
                                    break;
                                }
                                fs.Seek(-2, SeekOrigin.Current);
                                fs.Read(temptype, 0, 3);
                                i++;
                            }
                            fs.Seek(-3, SeekOrigin.Current);
                            break;
                        case "image/bmp":
 
                            while (i < size) //bmp开头424d
                            {
                                if (temptype[0] == 66 && temptype[1] == 77)
                                {
                                    break;
                                }
                                fs.Seek(-1, SeekOrigin.Current);
                                fs.Read(temptype, 0, 2);
                                i++;
                            }
                            fs.Seek(-2, SeekOrigin.Current);
                            break;
                        case "image/png":
                            while (i < size) //png开头89 50 4e 47 0d 0a 1a 0a
                            {
                                if (temptype[0] == 137 && temptype[1] == 80 && temptype[2] == 78 && temptype[3] == 71 && temptype[4] == 13)
                                {
                                    break;
                                }
                                fs.Seek(-9, SeekOrigin.Current);
                                fs.Read(temptype, 0, 10);
                                i++;
                            }
                            fs.Seek(-10, SeekOrigin.Current);
                            break;
                        default://FFFB为音频的开头
                            break;
                    }
 
                    byte[] imageBytes = new byte[size];
                    fs.Read(imageBytes, 0, size);
                    image = new Texture2D(128, 128);
                    image.LoadImage(imageBytes);
                }
                else
                {
                    image = null;
                }
            }
            else
            {
                image = null;
            }
        }
        catch (Exception ex)
        {
            Debug.LogWarning(ex.Message);
        }
        finally
        {
            fs.Close();
        }
        return image;
    }
}

20160218152426016.png

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