private static unsafe int GetInt(SfCommand command)
{
var i = default(int);
sf_command((SndFile__ *)null, command, &i, sizeof(int));
return(i);
}
private static bool SetStructure <T>(SndFile sndFile, SfCommand command, T structure, int valid) where T : struct
{
using (var m = new Marshaller <T>(structure))
{
var i = sf_command(sndFile, command, m.Address, m.Size);
return(i == valid);
}
}
private static bool GetBool([NotNull] SndFile sndFile, SfCommand command)
{
if (sndFile == null)
{
throw new ArgumentNullException(nameof(sndFile));
}
return(SetBool(sndFile, command, false));
}
private static unsafe int sf_command([NotNull] SndFile sndFile, SfCommand cmd, void *data, int dataSize)
{
if (sndFile == null)
{
throw new ArgumentNullException(nameof(sndFile));
}
var i = sf_command(sndFile.Handle, cmd, data, dataSize);
return(i);
}
private static unsafe bool SetLong([NotNull] SndFile sndFile, SfCommand command, long value)
{
if (sndFile == null)
{
throw new ArgumentNullException(nameof(sndFile));
}
var i = sf_command(sndFile, command, &value, sizeof(long));
return(i == 0);
}
private static unsafe string GetString([CanBeNull] SndFile__ *sndFile, SfCommand command, int size)
{
if (size <= 0)
{
throw new ArgumentOutOfRangeException(nameof(size));
}
var ptr = stackalloc sbyte[size];
var cmd = sf_command(sndFile, command, ptr, size);
var str = new string(ptr);
return(str);
}
private static unsafe T?GetStructure <T>([CanBeNull] SndFile sndFile, SfCommand command, T structure, int valid)
where T : struct
{
using (var m = new Marshaller <T>(structure))
{
var handle = sndFile != null ? sndFile.Handle : null;
var i = sf_command(handle, command, m.Address, m.Size);
if (i != valid)
{
return(null);
}
return(m.Pop());
}
}
private static unsafe double?GetDouble([NotNull] SndFile sndFile, SfCommand command, int match)
{
if (sndFile == null)
{
throw new ArgumentNullException(nameof(sndFile));
}
var d = default(double);
var i = sf_command(sndFile, command, &d, sizeof(double));
if (i != match)
{
return(null);
}
return(d);
}
private static unsafe bool SetDouble([NotNull] SndFile sndFile, SfCommand command, double value)
{
if (sndFile == null)
{
throw new ArgumentNullException(nameof(sndFile));
}
var i = sf_command(sndFile, command, &value, sizeof(double));
switch (i)
{
case SF_TRUE:
return(true);
case SF_FALSE:
return(false);
default:
throw new ArgumentOutOfRangeException(nameof(i));
}
}
private static bool SetBool([NotNull] SndFile sndFile, SfCommand command, bool value)
{
if (sndFile == null)
{
throw new ArgumentNullException(nameof(sndFile));
}
var i = sf_command(sndFile, command, IntPtr.Zero, value ? SF_TRUE : SF_FALSE);
switch (i)
{
case SF_TRUE:
return(true);
case SF_FALSE:
return(false);
default:
throw new ArgumentOutOfRangeException(nameof(i));
}
}
private static unsafe double[] GetDoubles([NotNull] SndFile sndFile, SfCommand command, int match)
{
if (sndFile == null)
{
throw new ArgumentNullException(nameof(sndFile));
}
var doubles = new double[sndFile.Format.Channels];
fixed(double *d = doubles)
{
var i = sf_command(sndFile.Handle, command, d, sizeof(double) * doubles.Length);
if (i != match)
{
return(null);
}
return(doubles);
}
}
private static extern unsafe int sf_command(SndFile__ *sndFile, SfCommand cmd, void *data, int dataSize);
private static SfFormatInfo?GetFormatInfo(SfCommand command, int format)
{
return(GetStructure(null, command, new SfFormatInfo(format), 0));
}