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C# DirectSound 錄音, 其他資訊: 並未將物件參考設定為物件的執行個體, test RRS feed

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  • test, 發問測試

    俺的目標是用 SOUND CARD 製造訊號或偵測 DTMF, 參考以下這個,

    http://khason.net/blog/sound-tone-and-dtmf-generation-by-using-managed-directsound-and-c-and-sine-tone-detection-with-pure-managed-goertzel-algorithm-implementation/

    後來找到以下的另外一篇,

    h t t p: / / b log. do news.com/u p look/archive/2005/12/14/657145.a s p x

    結果搞了一陣子後, 修修改改, 編譯算是通過了. 但是運行就出了這個錯誤. 俺的 Form1, 就兩個按鈕, 按 btnRecord 好像沒問題, 按 btnStop 就報錯.

    用 VS 2012, DirectX 2010/JUNE

    俺自己改的源碼 form1.cs

    // Form1.cs
    
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    //using System.Linq;
    using System.Text;
    //using System.Threading.Tasks;
    using System.Windows.Forms;
    
    // xioalaba, 2013-05-24
    // framework 2.0
    // CPU x86
    
    namespace directsound_rec
    
    
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                //SoundRecord recorder = null;    // 录音
                //recorder = new SoundRecord();
            }
         
    
            private void btnRecord_Click(object sender, EventArgs e)
            {
                //启动录音按钮:
                //
                // 录音设置
                //
                SoundRecord recorder = null;    // 录音
                recorder = new SoundRecord();
    
                string wavfile = null;
                wavfile = "test.wav";
                recorder.SetFileName(wavfile);
                recorder.RecStart();
            }
    
            private void btnStop_Click(object sender, EventArgs e)
            {
                SoundRecord recorder = null;    // 录音
                recorder = new SoundRecord();
                //中止录音按钮:
                recorder.RecStop();
                recorder = null;
            }
    
        }
    }





    按 btnStop 後, 報錯及停在 SoundRecord.cs 如下面的一行,

    mRecBuffer.Stop();

    俺自己改的 SoundRecord.cs 如下,

    //Soundrecord.cs
    
    //需要添加的外部引用文件
    //在系统的System32目录下添加以下两个引用文件,如果没有,在DirectX的开发包内可以找到。
    //Microsoft.DirectX.dll
    //Microsoft.DirectX.DirectSound.dll
    // REF : C#中使用DirectSound录音
    // h t t p://b log.d onews.com/up look/archive/2005/12/14/657145.a s p x
    // 只要貼以上這個網址, http://social.msdn.microsoft.com/Forums 每次都當掉...!!??
    
    //file namespace : SoundRecord.cs
    // xioalaba, 2013-05-24
    
    //frameworks 2.0
    // CPU x86
    
    using System.Collections.Generic;
    //using System.Linq;
    using System.Text;
    //using System.Threading.Tasks;
    
    //1.需要引用的程序集
    using System;
    using System.Windows.Forms;
    using System.Threading;
    using System.IO;
    // 对DirectSound的支持
    using Microsoft.DirectX;
    using Microsoft.DirectX.DirectSound;
    
    
    
    namespace directsound_rec
    {
    
        public class SoundRecord
        {
    
            //private SoundRecord recorder = null;    // 录音
            //窗体构造函数:
            //recorder = new SoundRecord();
    
            //2.   SoundRecord的成员数据
            public const int cNotifyNum = 16;       // 缓冲队列的数目
            private int mNextCaptureOffset = 0;      // 该次录音缓冲区的起始点
            private int mSampleCount = 0;            // 录制的样本数目
            private int mNotifySize = 0;             // 每次通知大小
            private int mBufferSize = 0;             // 缓冲队列大小
            private string mFileName = string.Empty;     // 文件名
            private FileStream mWaveFile = null;         // 文件流
            private BinaryWriter mWriter = null;         // 写文件
            private Capture mCapDev = null;              // 音频捕捉设备
            private CaptureBuffer mRecBuffer = null;     // 缓冲区对象
            private Notify mNotify = null;               // 消息通知对象
            private WaveFormat mWavFormat;                       // 录音的格式
            private Thread mNotifyThread = null;                 // 处理缓冲区消息的线程
            private AutoResetEvent mNotificationEvent = null;    // 通知事件
    
    
    
            //3.   对外操作的函数
            /// <summary>
            /// 构造函数,设定录音设备,设定录音格式.
            /// </summary>
            public SoundRecord()
            {
                // 初始化音频捕捉设备
                InitCaptureDevice();
    
                // 设定录音格式
                mWavFormat = CreateWaveFormat();
            }
    
            /// <summary>
            /// 设定录音结束后保存的文件,包括路径
            /// </summary>
            /// <param name="filename">保存wav文件的路径名</param>
            public void SetFileName(string filename)
            {
                mFileName = filename;
            }
    
            /// <summary>
            /// 开始录音
            /// </summary>
            public void RecStart()
            {
                // 创建录音文件
                CreateSoundFile();
    
                // 创建一个录音缓冲区,并开始录音
                CreateCaptureBuffer();
    
                // 建立通知消息,当缓冲区满的时候处理方法
                InitNotifications();
                mRecBuffer.Start(true);
    
                MessageBox.Show("xiaolaba, recording");
            }
    
    
            /// <summary>
            /// 停止录音
            /// </summary>
            public void RecStop()
            {
                // 关闭通知消息
                if (null != mNotificationEvent)
                    mNotificationEvent.Set();
    
                // 停止录音
                mRecBuffer.Stop();
    
                // 写入缓冲区最后的数据
                RecordCapturedData();
    
                // 回写长度信息
                mWriter.Seek(4, SeekOrigin.Begin);
                mWriter.Write((int)(mSampleCount + 36));   // 写文件长度
                mWriter.Seek(40, SeekOrigin.Begin);
                mWriter.Write(mSampleCount);                // 写数据长度
                mWriter.Close();
                mWaveFile.Close();
                mWriter = null;
                mWaveFile = null;
    
                MessageBox.Show("xiaolaba, Stop recording");
            }
    
            //4.内部调用函数
            /// <summary>
            /// 初始化录音设备,此处使用主录音设备.
            /// </summary>
            /// <returns>调用成功返回true,否则返回false</returns>
            private bool InitCaptureDevice()
            {
                // 获取默认音频捕捉设备
                CaptureDevicesCollection devices = new CaptureDevicesCollection();  // 枚举音频捕捉设备
                Guid deviceGuid = Guid.Empty;                                       // 音频捕捉设备的ID
                if (devices.Count > 0)
                    deviceGuid = devices[0].DriverGuid;
                else
                {
                    MessageBox.Show("系统中没有音频捕捉设备");
                    return false;
                }
    
                // 用指定的捕捉设备创建Capture对象
                try
                {
                    mCapDev = new Capture(deviceGuid);
                }
    
                catch (DirectXException e)
                {
                    MessageBox.Show(e.ToString());
                    return false;
                }
                return true;
            }
    
            /// <summary>
            /// 创建录音格式,此处使用16bit,16KHz,Mono的录音格式
            /// </summary>
            /// <returns>WaveFormat结构体</returns>
            private WaveFormat CreateWaveFormat()
            {
                WaveFormat format = new WaveFormat();
                format.FormatTag = WaveFormatTag.Pcm;   // PCM
                format.SamplesPerSecond = 16000;        // 16KHz
                format.BitsPerSample = 16;              // 16Bit
                format.Channels = 1;                    // Mono
                format.BlockAlign = (short)(format.Channels * (format.BitsPerSample / 8));
                format.AverageBytesPerSecond = format.BlockAlign * format.SamplesPerSecond;
                return format;
            }
    
            /// <summary>
            /// 创建录音使用的缓冲区
            /// </summary>
            private void CreateCaptureBuffer()
            {
                // 缓冲区的描述对象
                CaptureBufferDescription bufferdescription = new CaptureBufferDescription();
                if (null != mNotify)
                {
                    mNotify.Dispose();
                    mNotify = null;
                }
    
                if (null != mRecBuffer)
                {
                    mRecBuffer.Dispose();
                    mRecBuffer = null;
                }
    
                // 设定通知的大小,默认为1s钟
                mNotifySize = (1024 > mWavFormat.AverageBytesPerSecond / 8) ? 1024 : (mWavFormat.AverageBytesPerSecond / 8);
                mNotifySize -= mNotifySize % mWavFormat.BlockAlign;
    
                // 设定缓冲区大小
                mBufferSize = mNotifySize * cNotifyNum;
    
                // 创建缓冲区描述           
                bufferdescription.BufferBytes = mBufferSize;
                bufferdescription.Format = mWavFormat;           // 录音格式
    
                // 创建缓冲区
                mRecBuffer = new CaptureBuffer(bufferdescription, mCapDev);
                mNextCaptureOffset = 0;
            }
    
    
            /// <summary>
            /// 初始化通知事件,将原缓冲区分成16个缓冲队列,在每个缓冲队列的结束点设定通知点.
            /// </summary>
            /// <returns>是否成功</returns>
            private bool InitNotifications()
            {
                if (null == mRecBuffer)
                {
                    MessageBox.Show("未创建录音缓冲区");
                    return false;
                }
    
                // 创建一个通知事件,当缓冲队列满了就激发该事件.
                mNotificationEvent = new AutoResetEvent(false);
    
                // 创建一个线程管理缓冲区事件
                if (null == mNotifyThread)
                {
                    mNotifyThread = new Thread(new ThreadStart(WaitThread));
                    mNotifyThread.Start();
                }
    
                // 设定通知的位置
                BufferPositionNotify[] PositionNotify = new BufferPositionNotify[cNotifyNum + 1];
                for (int i = 0; i < cNotifyNum; i++)
                {
                    PositionNotify[i].Offset = (mNotifySize * i) + mNotifySize - 1;
                    PositionNotify[i].EventNotifyHandle = mNotificationEvent.Handle;
                }
    
                mNotify = new Notify(mRecBuffer);
                mNotify.SetNotificationPositions(PositionNotify, cNotifyNum);
                return true;
            }
    
            /// <summary>
            /// 将录制的数据写入wav文件
            /// </summary>
            private void RecordCapturedData()
            {
                byte[] CaptureData = null;
                int ReadPos;
                int CapturePos;
                int LockSize;
    
                mRecBuffer.GetCurrentPosition(out CapturePos, out ReadPos);
                LockSize = ReadPos - mNextCaptureOffset;
                if (LockSize < 0)
                    LockSize += mBufferSize;
    
                // 对齐缓冲区边界,实际上由于开始设定完整,这个操作是多余的.
                LockSize -= (LockSize % mNotifySize);
                if (0 == LockSize)
                    return;
    
                // 读取缓冲区内的数据
                CaptureData = (byte[])mRecBuffer.Read(mNextCaptureOffset, typeof(byte), LockFlag.None, LockSize);
    
                // 写入Wav文件
                mWriter.Write(CaptureData, 0, CaptureData.Length);
    
                // 更新已经录制的数据长度.
                mSampleCount += CaptureData.Length;
    
                // 移动录制数据的起始点,通知消息只负责指示产生消息的位置,并不记录上次录制的位置
                mNextCaptureOffset += CaptureData.Length;
                mNextCaptureOffset %= mBufferSize; // Circular buffer
            }
    
    
    
            /// <summary>
            /// 接收缓冲区满消息的处理线程
            /// </summary>
            private void WaitThread()
            {
                while (true)
                {
                    // 等待缓冲区的通知消息
                    mNotificationEvent.WaitOne(Timeout.Infinite, true);
    
                    // 录制数据
                    RecordCapturedData();
                }
            }
    
            /// <summary>
            /// 创建保存的波形文件,并写入必要的文件头.
            /// </summary>
            private void CreateSoundFile()
            {
    
                /**************************************************************************
    
             Here is where the file will be created. A
             wave file is a RIFF file, which has chunks
             of data that describe what the file contains.
    
             A wave RIFF file is put together like this:
             The 12 byte RIFF chunk is constructed like this:
             Bytes 0 – 3 :  'R' 'I' 'F' 'F'
             Bytes 4 – 7 :  Length of file, minus the first 8 bytes of the RIFF description.
                               (4 bytes for "WAVE" + 24 bytes for format chunk length +
                               8 bytes for data chunk description + actual sample data size.)
              Bytes 8 – 11: 'W' 'A' 'V' 'E'
                 * 
              The 24 byte FORMAT chunk is constructed like this:
              Bytes 0 – 3 : 'f' 'm' 't' ' '
              Bytes 4 – 7 : The format chunk length. This is always 16.
              Bytes 8 – 9 : File padding. Always 1.
              Bytes 10- 11: Number of channels. Either 1 for mono,  or 2 for stereo.
              Bytes 12- 15: Sample rate.
              Bytes 16- 19: Number of bytes per second.
              Bytes 20- 21: Bytes per sample. 1 for 8 bit mono, 2 for 8 bit stereo or
                            16 bit mono, 4 for 16 bit stereo.
              Bytes 22- 23: Number of bits per sample.
              The DATA chunk is constructed like this:
              Bytes 0 – 3 : 'd' 'a' 't' 'a'
              Bytes 4 – 7 : Length of data, in bytes.
              Bytes 8 -…: Actual sample data.
            ***************************************************************************/
    
                // Open up the wave file for writing.
                mWaveFile = new FileStream(mFileName, FileMode.Create);
                mWriter = new BinaryWriter(mWaveFile);
    
                // Set up file with RIFF chunk info.
                char[] ChunkRiff = { 'R', 'I', 'F', 'F' };
                char[] ChunkType = { 'W', 'A', 'V', 'E' };
                char[] ChunkFmt = { 'f', 'm', 't', ' ' };
                char[] ChunkData = { 'd', 'a', 't', 'a' };
                short shPad = 1;                // File padding
                int nFormatChunkLength = 0x10;  // Format chunk length.
                int nLength = 0;                // File length, minus first 8 bytes of RIFF description. This will be filled in later.
                short shBytesPerSample = 0;     // Bytes per sample.
    
                // 一个样本点的字节数目
                if (8 == mWavFormat.BitsPerSample && 1 == mWavFormat.Channels)
                    shBytesPerSample = 1;
                else if ((8 == mWavFormat.BitsPerSample && 2 == mWavFormat.Channels) || (16 == mWavFormat.BitsPerSample && 1 == mWavFormat.Channels))
                    shBytesPerSample = 2;
                else if (16 == mWavFormat.BitsPerSample && 2 == mWavFormat.Channels)
                    shBytesPerSample = 4;
    
                // RIFF 块
                mWriter.Write(ChunkRiff);
                mWriter.Write(nLength);
                mWriter.Write(ChunkType);
    
                // WAVE块
                mWriter.Write(ChunkFmt);
                mWriter.Write(nFormatChunkLength);
                mWriter.Write(shPad);
                mWriter.Write(mWavFormat.Channels);
                mWriter.Write(mWavFormat.SamplesPerSecond);
                mWriter.Write(mWavFormat.AverageBytesPerSecond);
                mWriter.Write(shBytesPerSample);
                mWriter.Write(mWavFormat.BitsPerSample);
                // 数据块
                mWriter.Write(ChunkData);
                mWriter.Write((int)0);   // The sample length will be written in later.
            }
    
            //6.需要添加的外部引用文件
            //在系统的System32目录下添加以下两个引用文件,如果没有,在DirectX的开发包内可以找到。
            //Microsoft.DirectX.dll
            //Microsoft.DirectX.DirectSound.dll
    
        }
    
    
    
    }






    2013年5月26日 上午 03:22

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    2013年5月26日 上午 05:14
    版主
  • 抱歉, 突然因為驗證錯誤, 全部都要重來,

    現在要等待驗證帳號才能繼續寫完.

    謝謝你的回應

    順道也請問版主, 俺已經用EMAIL通過驗證, 但是一直都不能貼圖到這個論壇, 啥原因呢

    2013年5月26日 上午 07:27