public static SoundInput FindFormat(Stream file)
{
uint signature = FormatCatalog.ReadSignature(file);
for (;;)
{
var range = FormatCatalog.Instance.LookupSignature <AudioFormat> (signature);
foreach (var impl in range)
{
try
{
file.Position = 0;
SoundInput sound = impl.TryOpen(file);
if (null != sound)
{
return(sound);
}
}
catch (System.Exception X)
{
FormatCatalog.Instance.LastError = X;
}
}
if (0 == signature)
{
break;
}
signature = 0;
}
return(null);
}
public override void Write(SoundInput source, Stream output)
{
using (var buffer = new BinaryWriter(output, Encoding.ASCII, true))
{
uint total_size = (uint)(0x2e - 8 + source.PcmSize);
buffer.Write(Signature);
buffer.Write(total_size);
buffer.Write(0x45564157); // 'WAVE'
buffer.Write(0x20746d66); // 'fmt '
buffer.Write(0x12);
buffer.Write(source.Format.FormatTag);
buffer.Write(source.Format.Channels);
buffer.Write(source.Format.SamplesPerSecond);
buffer.Write(source.Format.AverageBytesPerSecond);
buffer.Write(source.Format.BlockAlign);
buffer.Write(source.Format.BitsPerSample);
buffer.Write((ushort)0);
buffer.Write(0x61746164); // 'data'
buffer.Write((uint)source.PcmSize);
source.Position = 0;
source.CopyTo(output);
}
}
public static SoundInput Read(IBinaryStream file)
{
foreach (var impl in FormatCatalog.Instance.FindFormats <AudioFormat> (file.Name, file.Signature))
{
try
{
file.Position = 0;
SoundInput sound = impl.TryOpen(file);
if (null != sound)
{
return(sound);
}
}
catch (OperationCanceledException)
{
throw;
}
catch (System.Exception X)
{
FormatCatalog.Instance.LastError = X;
}
}
return(null);
}
public override void Write(SoundInput source, Stream output)
{
WriteRiffHeader(output, source.Format, (uint)source.PcmSize);
source.Position = 0;
source.CopyTo(output);
}
public virtual void Write(SoundInput source, Stream output)
{
throw new System.NotImplementedException("AudioFormat.Write not implemenented");
}
