public static bool Equals(WAVEFORMATEX x, WAVEFORMATEX y)
{
return
x.wFormatTag == y.wFormatTag &&
x.nChannels == y.nChannels &&
x.nSamplesPerSec == y.nSamplesPerSec &&
x.nAvgBytesPerSec == y.nAvgBytesPerSec &&
x.nBlockAlign == y.nBlockAlign &&
x.wBitsPerSample == y.wBitsPerSample;
}
public static WAVEFORMATEX ReadFrom(Stream stream)
{
var fmt = new WAVEFORMATEX();
var reader = new BinaryReader(stream);
fmt.wFormatTag = (WAVE_FORMAT_TAG)reader.ReadUInt16();
fmt.nChannels = reader.ReadUInt16();
fmt.nSamplesPerSec = reader.ReadUInt32();
fmt.nAvgBytesPerSec = reader.ReadUInt32();
fmt.nBlockAlign = reader.ReadUInt16();
fmt.wBitsPerSample = reader.ReadUInt16();
if (18 <= stream.Length)
fmt.cbSize = reader.ReadUInt16();
return fmt;
}
public static WAVEFORMATEX CreateLinearPcmFormat(long samplesPerSec, int bitsPerSample, int channles)
{
if (samplesPerSec <= 0)
throw new ArgumentOutOfRangeException("samplesPerSec", samplesPerSec, "must be non-zero positive number");
if (bitsPerSample <= 0)
throw new ArgumentOutOfRangeException("bitsPerSample", bitsPerSample, "must be non-zero positive number");
if ((bitsPerSample & 0x7) != 0x0)
throw new ArgumentOutOfRangeException("bitsPerSample", bitsPerSample, "must be number of n * 8");
if (channles <= 0)
throw new ArgumentOutOfRangeException("channles", channles, "must be non-zero positive number");
var format = new WAVEFORMATEX();
format.wFormatTag = WAVE_FORMAT_TAG.WAVE_FORMAT_PCM;
format.nChannels = (ushort)channles;
format.nSamplesPerSec = (uint)samplesPerSec;
format.wBitsPerSample = (ushort)bitsPerSample;
format.nBlockAlign = (ushort)((bitsPerSample * channles) >> 3);
format.nAvgBytesPerSec = format.nBlockAlign * format.nSamplesPerSec;
format.cbSize = 0;
return format;
}
