[摘]C#用DirectSound录音

使用时请给mSoundDataProcess一个函数，这样就可以进行语音数据的处理了…

void sound_process(byte[] rawdata) {/* 处理声音数据rawdata */}

 

SoundCap var = new SoundCap();

var.mSoundDataProcess = sound_process;

这样再var.RecStart()就可以在录音过程中对声音数据进行处理了.

使用时令writeIntoFile=ture，并使用SetFileName确定文件名，就可以保存为录音文件了…

var.SetFileName("C://tmp.wav");

var.writeIntoFile=true,然后再var.RecStart()就可以对录音的声音保存为文件了...

 

RecStart() 开始录音

RecStop() 停止录音

 

 

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using System; using System.Collections.Generic; using System.Text; using System.Threading; using System.IO; using Microsoft.DirectX; using Microsoft.DirectX.DirectSound; namespace SoundRecord { delegate void SoundDataProcessHandle(byte[] rawdata); class SoundCap { public const int cNotifyNum = 16; // 缓冲队列的数目 public SoundDataProcessHandle mSoundDataProcess = null; public bool writeIntoFile = false; 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 public SoundCap() { // 初始化音频捕捉设备 InitCaptureDevice(); // 设定录音格式 mWavFormat = CreateWaveFormat(); } public void SetFileName(string filename) { mFileName = filename; } public void RecStart() { // 创建录音文件 if(writeIntoFile) 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); } 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 if (writeIntoFile) { 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; } 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 { System.Windows.Forms.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) { System.Windows.Forms.MessageBox.Show(e.ToString()); return false; } return true; } 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; } 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; } private bool InitNotifications() { if (null == mRecBuffer) { System.Windows.Forms.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; } 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 if(writeIntoFile) mWriter.Write(CaptureData, 0, CaptureData.Length); if (mSoundDataProcess != null) mSoundDataProcess(CaptureData); // 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 } 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(); } } 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. } } }