www.pudn.com > waveindemo.rar > WaveNative.cs

 
using System; 
using System.Runtime.InteropServices; 
 
namespace WaveLib 
{ 
	internal class WaveNative 
	{ 
		// consts 
		public const int MMSYSERR_NOERROR = 0; // no error 
 
		public const int MM_WOM_OPEN = 0x3BB; 
		public const int MM_WOM_CLOSE = 0x3BC; 
		public const int MM_WOM_DONE = 0x3BD; 
 
		public const int MM_WIM_OPEN = 0x3BE; 
		public const int MM_WIM_CLOSE = 0x3BF; 
		public const int MM_WIM_DATA = 0x3C0; 
 
		public const int CALLBACK_FUNCTION = 0x00030000;    // dwCallback is a FARPROC  
 
		public const int TIME_MS = 0x0001;  // time in milliseconds  
		public const int TIME_SAMPLES = 0x0002;  // number of wave samples  
		public const int TIME_BYTES = 0x0004;  // current byte offset  
 
		// callbacks 
		public delegate void WaveDelegate(IntPtr hdrvr, int uMsg, int dwUser, ref WaveHdr wavhdr, int dwParam2); 
 
		// structs  
 
		[StructLayout(LayoutKind.Sequential)] public struct WaveHdr 
		{ 
			public IntPtr lpData; // pointer to locked data buffer 
			public int dwBufferLength; // length of data buffer 
			public int dwBytesRecorded; // used for input only 
			public IntPtr dwUser; // for client's use 
			public int dwFlags; // assorted flags (see defines) 
			public int dwLoops; // loop control counter 
			public IntPtr lpNext; // PWaveHdr, reserved for driver 
			public int reserved; // reserved for driver 
		} 
 
		private const string mmdll = "winmm.dll"; 
 
		// WaveOut calls 
		[DllImport(mmdll)] 
		public static extern int waveOutGetNumDevs(); 
		[DllImport(mmdll)] 
		public static extern int waveOutPrepareHeader(IntPtr hWaveOut, ref WaveHdr lpWaveOutHdr, int uSize); 
		[DllImport(mmdll)] 
		public static extern int waveOutUnprepareHeader(IntPtr hWaveOut, ref WaveHdr lpWaveOutHdr, int uSize); 
		[DllImport(mmdll)] 
		public static extern int waveOutWrite(IntPtr hWaveOut, ref WaveHdr lpWaveOutHdr, int uSize); 
		[DllImport(mmdll)] 
		public static extern int waveOutOpen(out IntPtr hWaveOut, int uDeviceID, WaveFormat lpFormat, WaveDelegate dwCallback, int dwInstance, int dwFlags); 
		[DllImport(mmdll)] 
		public static extern int waveOutReset(IntPtr hWaveOut); 
		[DllImport(mmdll)] 
		public static extern int waveOutClose(IntPtr hWaveOut); 
		[DllImport(mmdll)] 
		public static extern int waveOutPause(IntPtr hWaveOut); 
		[DllImport(mmdll)] 
		public static extern int waveOutRestart(IntPtr hWaveOut); 
		[DllImport(mmdll)] 
		public static extern int waveOutGetPosition(IntPtr hWaveOut, out int lpInfo, int uSize); 
		[DllImport(mmdll)] 
		public static extern int waveOutSetVolume(IntPtr hWaveOut, int dwVolume); 
		[DllImport(mmdll)] 
		public static extern int waveOutGetVolume(IntPtr hWaveOut, out int dwVolume); 
 
		// WaveIn calls 
		[DllImport(mmdll)] 
		public static extern int waveInGetNumDevs(); 
		[DllImport(mmdll)] 
		public static extern int waveInAddBuffer(IntPtr hwi, ref WaveHdr pwh, int cbwh); 
		[DllImport(mmdll)] 
		public static extern int waveInClose(IntPtr hwi); 
		[DllImport(mmdll)] 
		public static extern int waveInOpen(out IntPtr phwi, int uDeviceID, WaveFormat lpFormat, WaveDelegate dwCallback, int dwInstance, int dwFlags); 
		[DllImport(mmdll)] 
		public static extern int waveInPrepareHeader(IntPtr hWaveIn, ref WaveHdr lpWaveInHdr, int uSize); 
		[DllImport(mmdll)] 
		public static extern int waveInUnprepareHeader(IntPtr hWaveIn, ref WaveHdr lpWaveInHdr, int uSize); 
		[DllImport(mmdll)] 
		public static extern int waveInReset(IntPtr hwi); 
		[DllImport(mmdll)] 
		public static extern int waveInStart(IntPtr hwi); 
		[DllImport(mmdll)] 
		public static extern int waveInStop(IntPtr hwi); 
	} 
}