public WaveFormatExtensible(ESampleRate rate, EBitDepth bits, ESpeakerConfiguration channelMask, Guid subFormat)
: base(rate, bits, channelMask, WaveFormatEncoding.Extensible, Marshal.SizeOf(typeof(WaveFormatExtensible)))
{
wValidBitsPerSample = (short)bits;
dwChannelMask = (int)channelMask;
this.subFormat = subFormat;
}
public void SetSampleRate(ESampleRate sampleRate)
{
lock (lockObject)
{
switch (sampleRate)
{
case ESampleRate.Sps_49K:
//设置49K Hz 采样率
g_CtrlByte0 &= 0xf0;
g_CtrlByte0 |= 0x0e;
MyDLLimport.USBCtrlTrans(0x94, g_CtrlByte0, 1);
break;
case ESampleRate.Sps_96K:
//设置96K Hz 采样率
g_CtrlByte0 &= 0xf0;
g_CtrlByte0 |= 0x04;
MyDLLimport.USBCtrlTrans(0x94, g_CtrlByte0, 1);
break;
case ESampleRate.Sps_781K:
//设置781K Hz 采样率
g_CtrlByte0 &= 0xf0;
g_CtrlByte0 |= 0x0c;
MyDLLimport.USBCtrlTrans(0x94, g_CtrlByte0, 1);
break;
case ESampleRate.Sps_12M5:
// 设置12.5M Hz 采样率
g_CtrlByte0 &= 0xf0;
g_CtrlByte0 |= 0x08;
MyDLLimport.USBCtrlTrans(0x94, g_CtrlByte0, 1);
break;
case ESampleRate.Sps_100M:
//设置100M Hz 采样率
g_CtrlByte0 &= 0xf0;
g_CtrlByte0 |= 0x00;
MyDLLimport.USBCtrlTrans(0x94, g_CtrlByte0, 1);
break;
default:
break;
}
}
}
protected WaveFormat(ESampleRate rate, EBitDepth bits, ESpeakerConfiguration channelMask, WaveFormatEncoding formatTag, int totalSize)
{
channels = ChannelsFromMask((int)channelMask);
if (channels < 1)
{
throw new ArgumentOutOfRangeException(nameof(channelMask), "Channels must be 1 or greater");
}
SampleRate = (int)rate;
BitsPerSample = (short)bits;
cbSize = 0;
//blockAlign = (short)(channels * (bitsPerSample / 8));
//avgBytesPerSec = samplesPerSec * blockAlign;
this.formatTag = formatTag;
cbSize = (short)(totalSize - Marshal.SizeOf(typeof(WaveFormat)));
}
public WaveFormat(ESampleRate rate, EBitDepth bits, ESpeakerConfiguration channelMask)
: this(rate, bits, channelMask, WaveFormatEncoding.Pcm, Marshal.SizeOf(typeof(WaveFormat)))
{
}
/// <summary>
/// Creates a new WaveFormatExtensible for PCM
/// WMMEDIASUBTYPE_PCM("00000001-0000-0010-8000-00AA00389B71")
/// </summary>
public WaveFormatExtensible(ESampleRate rate, EBitDepth bits, ESpeakerConfiguration channelMask)
: this(rate, bits, channelMask, new Guid("00000001-0000-0010-8000-00AA00389B71"))
{
}
