private void TestEqual()
{
WaveFormatEx a1 = new WaveFormatEx();
WaveFormatEx a2 = new WaveFormatEx();
WaveFormatEx a3 = new WaveFormatEx();
WaveFormatEx a4 = null;
WaveFormatExWithData b1 = new WaveFormatExWithData();
WaveFormatExWithData b2 = new WaveFormatExWithData();
WaveFormatExWithData b3 = new WaveFormatExWithData();
WaveFormatEx b4 = null;
WaveFormatExtensible c1 = new WaveFormatExtensible();
WaveFormatExtensible c2 = new WaveFormatExtensible();
WaveFormatExtensible c3 = new WaveFormatExtensible();
WaveFormatEx c4 = null;
WaveFormatExtensibleWithData d1 = new WaveFormatExtensibleWithData();
WaveFormatExtensibleWithData d2 = new WaveFormatExtensibleWithData();
WaveFormatExtensibleWithData d3 = new WaveFormatExtensibleWithData();
WaveFormatEx d4 = null;
FillWave(a1, 1);
FillWave(a2, 1);
FillWave(a3, 2);
FillWave(b1, 1);
FillWave(b2, 1);
FillWave(b3, 2);
FillWave(c1, 1);
FillWave(c2, 1);
FillWave(c3, 2);
FillWave(d1, 1);
FillWave(d2, 1);
FillWave(d3, 2);
b1.byteData = new byte[3];
b2.byteData = new byte[3];
d1.byteData = new byte[3];
d2.byteData = new byte[3];
FillByteData(b1.byteData, 2);
FillByteData(b2.byteData, 2);
FillByteData(d1.byteData, 2);
FillByteData(d2.byteData, 2);
Debug.Assert(!a1.Equals(null));
Debug.Assert(!a1.Equals(this));
Debug.Assert(a1.Equals(a1));
Debug.Assert(a1.Equals(a2));
Debug.Assert(!a1.Equals(a3));
Debug.Assert(!a1.Equals(a4));
Debug.Assert(a1 != null);
Debug.Assert(null != a1);
Debug.Assert(a1 == a2);
Debug.Assert(a2 == a1);
Debug.Assert(a1 != a3);
Debug.Assert(a3 != a1);
Debug.Assert(a4 != a1);
Debug.Assert(a1 != a4);
Debug.Assert(!b1.Equals(null));
Debug.Assert(!b1.Equals(this));
Debug.Assert(b1.Equals(b1));
Debug.Assert(b1.Equals(b2));
Debug.Assert(!b1.Equals(b3));
Debug.Assert(!b1.Equals(b4));
Debug.Assert(b1 != null);
Debug.Assert(null != b1);
Debug.Assert(b1 == b2);
Debug.Assert(b2 == b1);
Debug.Assert(b1 != b3);
Debug.Assert(b3 != b1);
Debug.Assert(b4 != b1);
Debug.Assert(b1 != b4);
Debug.Assert(!c1.Equals(null));
Debug.Assert(!c1.Equals(this));
Debug.Assert(c1.Equals(c1));
Debug.Assert(c1.Equals(c2));
Debug.Assert(!c1.Equals(c3));
Debug.Assert(!c1.Equals(c4));
Debug.Assert(c1 != null);
Debug.Assert(null != c1);
Debug.Assert(c1 == c2);
Debug.Assert(c2 == c1);
Debug.Assert(c1 != c3);
Debug.Assert(c3 != c1);
Debug.Assert(c4 != c1);
Debug.Assert(c1 != c4);
Debug.Assert(!d1.Equals(null));
Debug.Assert(!d1.Equals(this));
Debug.Assert(d1.Equals(d1));
Debug.Assert(d1.Equals(d2));
Debug.Assert(!d1.Equals(d3));
Debug.Assert(!d1.Equals(d4));
Debug.Assert(d1 != null);
Debug.Assert(null != d1);
Debug.Assert(d1 == d2);
Debug.Assert(d2 == d1);
Debug.Assert(d1 != d3);
Debug.Assert(d3 != d1);
Debug.Assert(d4 != d1);
Debug.Assert(d1 != d4);
Debug.Assert(!a1.Equals(b1));
Debug.Assert(!a1.Equals(c1));
Debug.Assert(!a1.Equals(d1));
Debug.Assert(!b1.Equals(a1));
Debug.Assert(!b1.Equals(c1));
Debug.Assert(!b1.Equals(d1));
Debug.Assert(!c1.Equals(a1));
Debug.Assert(!c1.Equals(b1));
Debug.Assert(!c1.Equals(d1));
Debug.Assert(!d1.Equals(a1));
Debug.Assert(!d1.Equals(b1));
Debug.Assert(!d1.Equals(c1));
Debug.Assert(a1 != b1);
Debug.Assert(a1 != c1);
Debug.Assert(a1 != d1);
Debug.Assert(b1 != a1);
Debug.Assert(b1 != c1);
Debug.Assert(b1 != d1);
Debug.Assert(c1 != a1);
Debug.Assert(c1 != b1);
Debug.Assert(c1 != d1);
Debug.Assert(d1 != a1);
Debug.Assert(d1 != b1);
Debug.Assert(d1 != c1);
}
private void TestWaveFormatExtensible()
{
WaveFormatExtensible w1 = new WaveFormatExtensible();
FillWave(w1, 0);
w1.wFormatTag = -2;
w1.cbSize = 22;
FillExtensible(w1, 6);
IntPtr ip = w1.GetPtr();
WaveFormatExtensible w2 = WaveFormatExtensible.PtrToWave(ip) as WaveFormatExtensible;
Marshal.FreeCoTaskMem(ip);
Debug.Assert(w1 == w2);
}
private void FillExtensible(WaveFormatExtensible w1, short iOffset)
{
w1.wReserved = iOffset;
w1.dwChannelMask = (WaveMask)(iOffset + 1);
w1.SubFormat = Guid.NewGuid();
}
public static WaveFormatEx PtrToWave(IntPtr pNativeData)
{
short wFormatTag = Marshal.ReadInt16(pNativeData);
WaveFormatEx wfe;
// WAVE_FORMAT_EXTENSIBLE == -2
if (wFormatTag != -2)
{
short cbSize;
// By spec, PCM has no cbSize element
if (wFormatTag != 1)
{
cbSize = Marshal.ReadInt16(pNativeData, 16);
}
else
{
cbSize = 0;
}
// Does the structure contain extra data?
if (cbSize == 0)
{
// Create a simple WaveFormatEx struct
wfe = new WaveFormatEx();
Marshal.PtrToStructure(pNativeData, wfe);
// It probably already has the right value, but there is a special case
// where it might not, so, just to be safe...
wfe.cbSize = 0;
}
else
{
WaveFormatExWithData dat = new WaveFormatExWithData();
// Manually parse the data into the structure
dat.wFormatTag = wFormatTag;
dat.nChannels = Marshal.ReadInt16(pNativeData, 2);
dat.nSamplesPerSec = Marshal.ReadInt32(pNativeData, 4);
dat.nAvgBytesPerSec = Marshal.ReadInt32(pNativeData, 8);
dat.nBlockAlign = Marshal.ReadInt16(pNativeData, 12);
dat.wBitsPerSample = Marshal.ReadInt16(pNativeData, 14);
dat.cbSize = cbSize;
dat.byteData = new byte[dat.cbSize];
IntPtr ip2 = new IntPtr(pNativeData.ToInt64() + 18);
Marshal.Copy(ip2, dat.byteData, 0, dat.cbSize);
wfe = dat as WaveFormatEx;
}
}
else
{
short cbSize;
int extrasize = Marshal.SizeOf(typeof(WaveFormatExtensible)) - Marshal.SizeOf(typeof(WaveFormatEx));
cbSize = Marshal.ReadInt16(pNativeData, 16);
if (cbSize == extrasize)
{
WaveFormatExtensible ext = new WaveFormatExtensible();
Marshal.PtrToStructure(pNativeData, ext);
wfe = ext as WaveFormatEx;
}
else
{
WaveFormatExtensibleWithData ext = new WaveFormatExtensibleWithData();
int iExtraBytes = cbSize - extrasize;
ext.wFormatTag = wFormatTag;
ext.nChannels = Marshal.ReadInt16(pNativeData, 2);
ext.nSamplesPerSec = Marshal.ReadInt32(pNativeData, 4);
ext.nAvgBytesPerSec = Marshal.ReadInt32(pNativeData, 8);
ext.nBlockAlign = Marshal.ReadInt16(pNativeData, 12);
ext.wBitsPerSample = Marshal.ReadInt16(pNativeData, 14);
ext.cbSize = cbSize;
ext.wValidBitsPerSample = Marshal.ReadInt16(pNativeData, 18);
ext.dwChannelMask = (WaveMask)Marshal.ReadInt16(pNativeData, 20);
// Read the Guid
byte[] byteGuid = new byte[16];
Marshal.Copy(new IntPtr(pNativeData.ToInt64() + 24), byteGuid, 0, 16);
ext.SubFormat = new Guid(byteGuid);
ext.byteData = new byte[iExtraBytes];
IntPtr ip2 = new IntPtr(pNativeData.ToInt64() + Marshal.SizeOf(typeof(WaveFormatExtensible)));
Marshal.Copy(ip2, ext.byteData, 0, iExtraBytes);
wfe = ext as WaveFormatEx;
}
}
return wfe;
}