public void TestLoadStandardWaveFile()
{
using (MemoryStream memoryStream = new MemoryStream()) {
{
byte[] testData = new byte[] {
0x66, 0x6D, 0x74, 0x20, 0x32, 0x00, 0x00, 0x00,
0x02, 0x00, 0x02, 0x00, 0x22, 0x56, 0x00, 0x00,
0x27, 0x57, 0x00, 0x00, 0x00, 0x04
};
memoryStream.Write(testData, 0, testData.Length);
}
memoryStream.Position = 0;
{
WaveFormat restored;
BinaryReader reader = new BinaryReader(memoryStream);
int restoredFileLength = WaveFormat.Load(reader, out restored);
Assert.AreEqual(50, restoredFileLength);
Assert.AreEqual(2, restored.FormatTag);
Assert.AreEqual(2, restored.ChannelCount);
Assert.AreEqual(22050, restored.SamplesPerSecond);
Assert.AreEqual(22311, restored.AverageBytesPerSecond);
Assert.AreEqual(1024, restored.BlockAlignment);
}
}
}
public void TestLoadVersusSave()
{
WaveFormat original;
original.FormatTag = 0x1A2B;
original.ChannelCount = 42;
original.SamplesPerSecond = 123456789;
original.AverageBytesPerSecond = 987654321;
original.BlockAlignment = 1928;
using (MemoryStream memoryStream = new MemoryStream()) {
{
BinaryWriter writer = new BinaryWriter(memoryStream);
WaveFormat.Save(writer, ref original);
}
memoryStream.Position = 0;
{
WaveFormat restored;
BinaryReader reader = new BinaryReader(memoryStream);
int restoredFileLength = WaveFormat.Load(reader, out restored);
Assert.AreEqual(WaveFormat.Size, restoredFileLength);
Assert.AreEqual(original.FormatTag, restored.FormatTag);
Assert.AreEqual(original.ChannelCount, restored.ChannelCount);
Assert.AreEqual(original.SamplesPerSecond, restored.SamplesPerSecond);
Assert.AreEqual(original.AverageBytesPerSecond, restored.AverageBytesPerSecond);
Assert.AreEqual(original.BlockAlignment, restored.BlockAlignment);
}
}
}
/// <summary>Reads the WaveFormat information structure from a binary stream</summary>
/// <param name="reader">Reader from which to read the WaveFormat structure</param>
/// <param name="waveFormatEx">Wave format structure to be written to the file</param>
/// <returns>The total size of the structure as indicated in the size field</returns>
public static int Load(BinaryReader reader, out WaveFormatEx waveFormatEx)
{
int chunkLength = WaveFormat.Load(reader, out waveFormatEx.WaveFormat);
waveFormatEx.BitsPerSample = reader.ReadUInt16();
waveFormatEx.ExtraInformationSize = reader.ReadUInt16();
// Done, return the chunk's indicated length, the caller might be interested
// in this number to either skip additional data or process it
return(chunkLength);
}
public void TestLoadNonWaveData()
{
using (MemoryStream memoryStream = new MemoryStream()) {
{
byte[] testData = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
memoryStream.Write(testData, 0, testData.Length);
}
memoryStream.Position = 0;
{
WaveFormat restored;
BinaryReader reader = new BinaryReader(memoryStream);
Assert.Throws <IOException>(
delegate() { WaveFormat.Load(reader, out restored); }
);
}
}
}