public void WaveFormat_Equality()
{
// Create WaveFormat object
WaveFormat format = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 2, 8, 384000);
// Create an identical WaveFormat object and check for equality
WaveFormat copy = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 2, 8, 384000);
Assert.AreEqual(format, copy);
// Make multiple copies each with a field modified and verify inequality
copy = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_PCM, 48000, 32, 2, 8, 384000);
Assert.AreNotEqual(format, copy);
copy = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 16000, 32, 2, 8, 384000);
Assert.AreNotEqual(format, copy);
copy = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 16, 2, 8, 384000);
Assert.AreNotEqual(format, copy);
copy = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 1, 8, 384000);
Assert.AreNotEqual(format, copy);
copy = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 2, 4, 384000);
Assert.AreNotEqual(format, copy);
copy = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 2, 8, 32000);
Assert.AreNotEqual(format, copy);
// Test null and reference equality
copy = format;
Assert.AreEqual(format, copy);
copy = null;
Assert.AreNotEqual(format, copy);
}
public void WaveFormat_CreateCopy()
{
// Create WaveFormat object
WaveFormat format = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 2, 8, 384000);
// Create a copy and check for equality
WaveFormat copy = WaveFormat.Create(format);
Assert.AreEqual(format, copy);
}
public void WaveFormat_MarshalIncorrectNonZeroExtraSize()
{
// Create WaveFormat object
WaveFormat format = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_EXTENSIBLE, 48000, 32, 2, 8, 384000);
// Fiddle with the length to make it non-zero
format.ExtraSize = 16;
// Write WaveFormat object out to a memory stream (should throw expected exception)
IntPtr formatPtr = Marshal.AllocHGlobal(WaveFormat.MarshalSizeOf(format));
WaveFormat.MarshalToPtr(format, formatPtr);
Marshal.FreeHGlobal(formatPtr);
}
public void WaveFormatEx_CreateCopy()
{
// Create WaveFormatEx object
byte[] extraInfo = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 };
WaveFormat format = WaveFormatEx.Create(WaveFormatTag.WAVE_FORMAT_EXTENSIBLE, 48000, 32, 2, 8, 384000, extraInfo);
// Create a copy and check for equality
WaveFormat copy = WaveFormat.Create(format);
Assert.IsTrue(copy is WaveFormatEx);
Assert.AreEqual(format, copy);
// Create WaveFormatEx object (with no extra bytes)
format = WaveFormatEx.Create(WaveFormatTag.WAVE_FORMAT_EXTENSIBLE, 48000, 32, 2, 8, 384000);
// Create a copy and check for equality
copy = WaveFormat.Create(format);
Assert.IsTrue(copy is WaveFormatEx);
Assert.AreEqual(format, copy);
}
public void WaveFormat_Create()
{
// Define "native" WAVEFORMATEX structure
byte[] formatBytes = new byte[]
{
0x03, 0x00, // FormatTag = 3
0x02, 0x00, // Channels = 2
0x80, 0xbb, 0x00, 0x00, // SamplesPerSec = 48000
0x00, 0xdc, 0x05, 0x00, // AvgBytesPerSec = 384000
0x08, 0x00, // BlockAlign = 8
0x20, 0x00, // BitsPerSample = 32
0x00, 0x00, // ExtraSize = 0
};
// Create equivalent managed WaveFormat object
WaveFormat format = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 2, 8, 384000);
// Verify against expected
this.MarshalAndVerify(format, formatBytes);
}
public void WaveFormat_ReadWrite()
{
// Create WaveFormat object
WaveFormat format = WaveFormat.Create(WaveFormatTag.WAVE_FORMAT_IEEE_FLOAT, 48000, 32, 2, 8, 384000);
// Write WaveFormat object out to a memory stream
MemoryStream stream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(stream);
format.WriteTo(writer);
// Verify written bytes for equality
byte[] streamBytes = stream.ToArray();
this.MarshalAndVerify(format, streamBytes);
// Read WaveFormat back from the stream and verify
stream.Seek(0, SeekOrigin.Begin);
WaveFormat copy = WaveFormat.FromStream(stream, Marshal.SizeOf(format));
Assert.AreEqual(format, copy);
}