121 lines
4.1 KiB
C#
121 lines
4.1 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace SafeMobileLib
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{
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public enum WaveFormats
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{
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Pcm = 1,
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Float = 3
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}
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[StructLayout(LayoutKind.Sequential)]
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public class WaveFormat
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{
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public short wFormatTag;
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public short nChannels;
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public int nSamplesPerSec;
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public int nAvgBytesPerSec;
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public short nBlockAlign;
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public short wBitsPerSample;
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public short cbSize;
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public WaveFormat(int rate, int bits, int channels)
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{
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wFormatTag = (short)WaveFormats.Pcm;
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nChannels = (short)channels;
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nSamplesPerSec = rate;
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wBitsPerSample = (short)bits;
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cbSize = 0;
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nBlockAlign = (short)(channels * (bits / 8));
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nAvgBytesPerSec = nSamplesPerSec * nBlockAlign;
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}
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}
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internal class WaveNative
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{
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// consts
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public const int MMSYSERR_NOERROR = 0; // no error
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public const int MM_WOM_OPEN = 0x3BB;
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public const int MM_WOM_CLOSE = 0x3BC;
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public const int MM_WOM_DONE = 0x3BD;
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public const int MM_WIM_OPEN = 0x3BE;
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public const int MM_WIM_CLOSE = 0x3BF;
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public const int MM_WIM_DATA = 0x3C0;
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public const int CALLBACK_FUNCTION = 0x00030000; // dwCallback is a FARPROC
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public const int TIME_MS = 0x0001; // time in milliseconds
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public const int TIME_SAMPLES = 0x0002; // number of wave samples
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public const int TIME_BYTES = 0x0004; // current byte offset
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// callbacks
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public delegate void WaveDelegate(IntPtr hdrvr, int uMsg, int dwUser, ref WaveHdr wavhdr, int dwParam2);
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// structs
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[StructLayout(LayoutKind.Sequential)] public struct WaveHdr
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{
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public IntPtr lpData; // pointer to locked data buffer
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public int dwBufferLength; // length of data buffer
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public int dwBytesRecorded; // used for input only
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public IntPtr dwUser; // for client's use
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public int dwFlags; // assorted flags (see defines)
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public int dwLoops; // loop control counter
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public IntPtr lpNext; // PWaveHdr, reserved for driver
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public int reserved; // reserved for driver
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}
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private const string mmdll = "winmm.dll";
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// WaveOut calls
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[DllImport(mmdll)]
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public static extern int waveOutGetNumDevs();
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[DllImport(mmdll)]
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public static extern int waveOutPrepareHeader(IntPtr hWaveOut, ref WaveHdr lpWaveOutHdr, int uSize);
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[DllImport(mmdll)]
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public static extern int waveOutUnprepareHeader(IntPtr hWaveOut, ref WaveHdr lpWaveOutHdr, int uSize);
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[DllImport(mmdll)]
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public static extern int waveOutWrite(IntPtr hWaveOut, ref WaveHdr lpWaveOutHdr, int uSize);
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[DllImport(mmdll)]
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public static extern int waveOutOpen(out IntPtr hWaveOut, int uDeviceID, WaveFormat lpFormat, WaveDelegate dwCallback, int dwInstance, int dwFlags);
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[DllImport(mmdll)]
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public static extern int waveOutReset(IntPtr hWaveOut);
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[DllImport(mmdll)]
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public static extern int waveOutClose(IntPtr hWaveOut);
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[DllImport(mmdll)]
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public static extern int waveOutPause(IntPtr hWaveOut);
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[DllImport(mmdll)]
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public static extern int waveOutRestart(IntPtr hWaveOut);
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[DllImport(mmdll)]
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public static extern int waveOutGetPosition(IntPtr hWaveOut, out int lpInfo, int uSize);
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[DllImport(mmdll)]
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public static extern int waveOutSetVolume(IntPtr hWaveOut, int dwVolume);
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[DllImport(mmdll)]
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public static extern int waveOutGetVolume(IntPtr hWaveOut, out int dwVolume);
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// WaveIn calls
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[DllImport(mmdll)]
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public static extern int waveInGetNumDevs();
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[DllImport(mmdll)]
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public static extern int waveInAddBuffer(IntPtr hwi, ref WaveHdr pwh, int cbwh);
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[DllImport(mmdll)]
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public static extern int waveInClose(IntPtr hwi);
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[DllImport(mmdll)]
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public static extern int waveInOpen(out IntPtr phwi, int uDeviceID, WaveFormat lpFormat, WaveDelegate dwCallback, int dwInstance, int dwFlags);
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[DllImport(mmdll)]
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public static extern int waveInPrepareHeader(IntPtr hWaveIn, ref WaveHdr lpWaveInHdr, int uSize);
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[DllImport(mmdll)]
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public static extern int waveInUnprepareHeader(IntPtr hWaveIn, ref WaveHdr lpWaveInHdr, int uSize);
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[DllImport(mmdll)]
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public static extern int waveInReset(IntPtr hwi);
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[DllImport(mmdll)]
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public static extern int waveInStart(IntPtr hwi);
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[DllImport(mmdll)]
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public static extern int waveInStop(IntPtr hwi);
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}
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}
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