作为学习C#的借口,我一直在尝试编写一个简单的项目:创建音频文件。首先,我想确保我能够编写符合WAVE格式的文件。我已经在线上研究了该格式(例如here),但每当我尝试播放文件时,它都无法正确打开。以下是我的代码。是否有什么遗漏或不正确的地方?
uint numsamples = 44100;
ushort numchannels = 1;
ushort samplelength = 1; // in bytes
uint samplerate = 22050;
FileStream f = new FileStream("a.wav", FileMode.Create);
BinaryWriter wr = new BinaryWriter(f);
wr.Write("RIFF");
wr.Write(36 + numsamples * numchannels * samplelength);
wr.Write("WAVEfmt ");
wr.Write(16);
wr.Write((ushort)1);
wr.Write(numchannels);
wr.Write(samplerate);
wr.Write(samplerate * samplelength * numchannels);
wr.Write(samplelength * numchannels);
wr.Write((ushort)(8 * samplelength));
wr.Write("data");
wr.Write(numsamples * samplelength);
// for now, just a square wave
Waveform a = new Waveform(440, 50);
double t = 0.0;
for (int i = 0; i < numsamples; i++, t += 1.0 / samplerate)
{
wr.Write((byte)((a.sample(t) + (samplelength == 1 ? 128 : 0)) & 0xff));
}
WaveForm
是什么?来自哪个库? - Matthieu Charbonnier