那么在.NET(WinForms)中播放简单生成的莫尔斯代码的最佳方法是什么,不需要任何外部文件,也没有任何第三方库?我只想使用CLR,没有不必要的依赖。欢迎使用C#或VB.NET代码。我是多语言的。 ; P
(我真的不在乎产生什么音频。一个简单的单频音就好了。)
答案 0 :(得分:2)
有很多方法可以实现你想要的......
我认为对你来说最简单的就是播放一些MIDI音符。
请参阅此文章:http://msdn.microsoft.com/en-us/magazine/ee336028.aspx
NAudio库是开源的,如果你真的很不开心'你可以将额外的DLL复制粘贴到你的项目中。
答案 1 :(得分:1)
我在其他网站上找到了一半的在线帮助,大约一半我想出了自己的方法。这是我所需要的几乎理想的解决方案:
1:创建一个MemoryStream,
2:将WAV文件的字节写入MemoryStream(永远不会保存到磁盘,但会像WAV文件一样播放),
3:寻找MemoryStream的开头,
4:使用System.Media.SoundPlayer(memoryStream).Play()
播放MemoryStream。
而已。最困难的部分是创建WAV格式的字节流......除非你只是复制像我这样的人的代码。 :P
这是一个.NET方法,它将播放没有外部DLL或.NET外部任何东西的声音:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Windows.Forms;
public static void PlayBeep(UInt16 frequency, int msDuration, UInt16 volume = 16383)
{
var mStrm = new MemoryStream();
BinaryWriter writer = new BinaryWriter(mStrm);
const double TAU = 2 * Math.PI;
int formatChunkSize = 16;
int headerSize = 8;
short formatType = 1;
short tracks = 1;
int samplesPerSecond = 44100;
short bitsPerSample = 16;
short frameSize = (short)(tracks * ((bitsPerSample + 7) / 8));
int bytesPerSecond = samplesPerSecond * frameSize;
int waveSize = 4;
int samples = (int)((decimal)samplesPerSecond * msDuration / 1000);
int dataChunkSize = samples * frameSize;
int fileSize = waveSize + headerSize + formatChunkSize + headerSize + dataChunkSize;
// var encoding = new System.Text.UTF8Encoding();
writer.Write(0x46464952); // = encoding.GetBytes("RIFF")
writer.Write(fileSize);
writer.Write(0x45564157); // = encoding.GetBytes("WAVE")
writer.Write(0x20746D66); // = encoding.GetBytes("fmt ")
writer.Write(formatChunkSize);
writer.Write(formatType);
writer.Write(tracks);
writer.Write(samplesPerSecond);
writer.Write(bytesPerSecond);
writer.Write(frameSize);
writer.Write(bitsPerSample);
writer.Write(0x61746164); // = encoding.GetBytes("data")
writer.Write(dataChunkSize);
{
double theta = frequency * TAU / (double)samplesPerSecond;
// 'volume' is UInt16 with range 0 thru Uint16.MaxValue ( = 65 535)
// we need 'amp' to have the range of 0 thru Int16.MaxValue ( = 32 767)
double amp = volume >> 2; // so we simply set amp = volume / 2
for (int step = 0; step < samples; step++)
{
short s = (short)(amp * Math.Sin(theta * (double)step));
writer.Write(s);
}
}
mStrm.Seek(0, SeekOrigin.Begin);
new System.Media.SoundPlayer(mStrm).Play();
writer.Close();
mStrm.Close();
} // public static void PlayBeep(UInt16 frequency, int msDuration, UInt16 volume = 16383)
快乐的编码!
-Humilulo&LT;&GT;&LT;
答案 2 :(得分:0)
使用Console.Beep(frequency, duration)
private static void Main(string[] args)
{
int freq = 500;
int duration = 500;
Console.Beep(freq, duration); //S
Console.Beep(freq, duration);
Console.Beep(freq, duration);
Console.Beep(freq, duration * 2); //O
Console.Beep(freq, duration * 2);
Console.Beep(freq, duration * 2);
Console.Beep(freq, duration); //S
Console.Beep(freq, duration);
Console.Beep(freq, duration);
}