protected override void WndProc(ref System.Windows.Forms.Message m) { WaveMessage message = (WaveMessage)m.Msg; switch (message) { case WaveMessage.WaveOutDone: case WaveMessage.WaveInData: IntPtr hOutputDevice = m.WParam; WaveHeader waveHeader = new WaveHeader(); Marshal.PtrToStructure(m.LParam, waveHeader); waveCallback(hOutputDevice, message, IntPtr.Zero, waveHeader, IntPtr.Zero); break; case WaveMessage.WaveOutOpen: case WaveMessage.WaveOutClose: case WaveMessage.WaveInClose: case WaveMessage.WaveInOpen: waveCallback(m.WParam, message, IntPtr.Zero, null, IntPtr.Zero); break; default: base.WndProc(ref m); break; } }
private GCHandle hThis; // for the user callback /// <summary> /// creates a new wavebuffer /// </summary> /// <param name="waveInHandle">WaveIn device to write to</param> /// <param name="bufferSize">Buffer size in bytes</param> public WaveInBuffer(IntPtr waveInHandle, Int32 bufferSize) { this.bufferSize = bufferSize; this.buffer = new byte[bufferSize]; this.hBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned); this.waveInHandle = waveInHandle; header = new WaveHeader(); hHeader = GCHandle.Alloc(header, GCHandleType.Pinned); header.dataBuffer = hBuffer.AddrOfPinnedObject(); header.bufferLength = bufferSize; header.loops = 1; hThis = GCHandle.Alloc(this); header.userData = (IntPtr)hThis; MmException.Try(WaveInterop.waveInPrepareHeader(waveInHandle, header, Marshal.SizeOf(header)), "waveInPrepareHeader"); //MmException.Try(WaveInterop.waveInAddBuffer(waveInHandle, header, Marshal.SizeOf(header)), "waveInAddBuffer"); }
private GCHandle hThis; // for the user callback /// <summary> /// creates a new wavebuffer /// </summary> /// <param name="hWaveOut">WaveOut device to write to</param> /// <param name="bufferSize">Buffer size in bytes</param> /// <param name="bufferFillStream">Stream to provide more data</param> /// <param name="waveOutLock">Lock to protect WaveOut API's from being called on >1 thread</param> public WaveOutBuffer(IntPtr hWaveOut, Int32 bufferSize, IWaveProvider bufferFillStream, object waveOutLock) { this.bufferSize = bufferSize; this.buffer = new byte[bufferSize]; this.hBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned); this.hWaveOut = hWaveOut; this.waveStream = bufferFillStream; this.waveOutLock = waveOutLock; header = new WaveHeader(); hHeader = GCHandle.Alloc(header, GCHandleType.Pinned); header.dataBuffer = hBuffer.AddrOfPinnedObject(); header.bufferLength = bufferSize; header.loops = 1; hThis = GCHandle.Alloc(this); header.userData = (IntPtr)hThis; lock (waveOutLock) { MmException.Try(WaveInterop.waveOutPrepareHeader(hWaveOut, header, Marshal.SizeOf(header)), "waveOutPrepareHeader"); } }
public static extern MmResult waveInAddBuffer(IntPtr hWaveIn, WaveHeader pwh, int cbwh);
public static extern MmResult waveInUnprepareHeader(IntPtr hWaveIn, WaveHeader lpWaveInHdr, int uSize);
public static extern MmResult waveOutWrite(IntPtr hWaveOut, WaveHeader lpWaveOutHdr, int uSize);
public static extern MmResult waveOutPrepareHeader(IntPtr hWaveOut, WaveHeader lpWaveOutHdr, int uSize);
/// <summary> /// Called when we get a new buffer of recorded data /// </summary> private void Callback(IntPtr waveInHandle, WaveMessage message, IntPtr userData, WaveHeader waveHeader, IntPtr reserved) { if (message == WaveMessage.WaveInData) { if (recording) { var hBuffer = (GCHandle)waveHeader.userData; var buffer = (WaveInBuffer)hBuffer.Target; if (buffer == null) { return; } lastReturnedBufferIndex = Array.IndexOf(buffers, buffer); RaiseDataAvailable(buffer); try { buffer.Reuse(); } catch (Exception e) { recording = false; RaiseRecordingStopped(e); } } } }