我想将 NAudio 用于录制程序,但遇到了意想不到的限制。NAudio.Wave.WaveIn.GetCapabilities(deviceNumber) 返回一个 WaveInCapabilities 结构,但该结构中只有少数字段是公开的。
特别是我需要知道设备支持哪些格式。该信息位于:
私有 SupportedWaveFormat 支持格式;
我可以将其更改为公共并构建 NAaudio.dll,但我想知道是否有某些原因将该字段标记为私有?或者还有其他地方我可以找到这些信息吗?
网上有一个例子,我编辑了它,这对我来说可以从不同的设备上获取所有的功能(它很丑,但它可以工作......):
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Collections;
namespace _4ch_stream
{
class clsRecDevices
{
[StructLayout(LayoutKind.Sequential, Pack = 4)]
public struct WaveInCaps
{
public short wMid;
public short wPid;
public int vDriverVersion;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
public char[] szPname;
public uint dwFormats;
public short wChannels;
public short wReserved1;
}
[DllImport("winmm.dll")]
public static extern int waveInGetNumDevs();
[DllImport("winmm.dll", EntryPoint = "waveInGetDevCaps")]
public static extern int waveInGetDevCapsA(int uDeviceID,
ref WaveInCaps lpCaps, int uSize);
public ArrayList arrLst = new ArrayList();
//using to store all sound recording devices strings
static int devcount = waveInGetNumDevs();
public static short[] Mid = new short[devcount];
public static short[] Pid = new short[devcount];
public static int[] DriverVersion = new int[devcount];
public static uint[] Formats = new uint[devcount];
public static short[] Channels = new short[devcount];
public static short[] Reserved1 = new short[devcount];
public int Count
//to return total sound recording devices found
{
get { return arrLst.Count; }
}
public string this[int indexer]
//return spesipic sound recording device name
{
get { return (string)arrLst[indexer]; }
}
public clsRecDevices() //fill sound recording devices array
{
int waveInDevicesCount = waveInGetNumDevs(); //get total
if (waveInDevicesCount > 0)
{
for (int uDeviceID = 0; uDeviceID < waveInDevicesCount; uDeviceID++)
{
WaveInCaps waveInCaps = new WaveInCaps();
waveInGetDevCapsA(uDeviceID, ref waveInCaps,
Marshal.SizeOf(typeof(WaveInCaps)));
arrLst.Add(new string(waveInCaps.szPname).Remove(
new string(waveInCaps.szPname).IndexOf('\0')).Trim());
Mid[uDeviceID] = waveInCaps.wMid;
Pid[uDeviceID] = waveInCaps.wPid;
Formats[uDeviceID] = waveInCaps.dwFormats;
Channels[uDeviceID] = waveInCaps.wChannels;
Reserved1[uDeviceID] = waveInCaps.wReserved1;
//clean garbage
}
}
}
}
}
希望它有所帮助。