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 static System.Tuple <ImageFormat, ImageMetaData> FindFormat(Stream file, string filename = null)
{
if (file.Length < 4)
{
return(null);
}
uint signature = FormatCatalog.ReadSignature(file);
Lazy <string> ext = null;
if (!string.IsNullOrEmpty(filename))
{
ext = new Lazy <string> (() => Path.GetExtension(filename).TrimStart('.').ToLowerInvariant());
}
for (;;)
{
var range = FormatCatalog.Instance.LookupSignature <ImageFormat> (signature);
// check formats that match filename extension first
if (ext != null && range.Skip(1).Any())
{
range = range.OrderByDescending(f => f.Extensions.Any(e => e == ext.Value));
}
foreach (var impl in range)
{
try
{
file.Position = 0;
ImageMetaData metadata = impl.ReadMetaData(file);
if (null != metadata)
{
metadata.FileName = filename;
return(Tuple.Create(impl, metadata));
}
}
catch { }
}
if (0 == signature)
{
break;
}
signature = 0;
}
return(null);
}
