unsafe T[] GetArray <T> (AudioConverterPropertyID prop, int elementSize)
{
int size;
bool writable;
if (AudioConverterGetPropertyInfo(handle, prop, out size, out writable) != AudioConverterError.None)
{
return(null);
}
var data = new T [size / elementSize];
var array_handle = GCHandle.Alloc(data, GCHandleType.Pinned);
try {
var ptr = array_handle.AddrOfPinnedObject();
var res = AudioConverterGetProperty(handle, prop, ref size, ptr);
if (res != 0)
{
return(null);
}
Array.Resize(ref data, size / elementSize);
return(data);
} finally {
array_handle.Free();
}
}
unsafe T[] GetArray <T> (AudioConverterPropertyID prop, int elementSize)
{
int size;
bool writable;
if (AudioConverterGetPropertyInfo(handle, prop, out size, out writable) != AudioConverterError.None)
{
return(null);
}
var data = new T [size / elementSize];
var array_handle = GCHandle.Alloc(data, GCHandleType.Pinned); // This requires a pinned GCHandle, since it's not possible to use unsafe code to get the address of a generic object.
try {
var ptr = array_handle.AddrOfPinnedObject();
var res = AudioConverterGetProperty(handle, prop, ref size, ptr);
if (res != 0)
{
return(null);
}
Array.Resize(ref data, size / elementSize);
return(data);
} finally {
array_handle.Free();
}
}
unsafe T[] GetArray <T> (AudioConverterPropertyID prop, int elementSize) where T : struct
{
int size;
bool writable;
if (AudioConverterGetPropertyInfo(handle, prop, out size, out writable) != AudioConverterError.None)
{
return(null);
}
var data = new T[size / elementSize];
fixed(T *ptr = &data[0])
{
var res = AudioConverterGetProperty(handle, prop, ref size, (IntPtr)ptr);
if (res != 0)
{
return(null);
}
Array.Resize(ref data, size / elementSize);
return(data);
}
}
void SetProperty(AudioConverterPropertyID propertyID, double value)
{
var res = AudioConverterSetProperty(handle, propertyID, sizeof(double), ref value);
if (res != AudioConverterError.None)
{
throw new ArgumentException(res.ToString());
}
}
double GetDoubleProperty(AudioConverterPropertyID propertyID)
{
double value;
var size = sizeof(double);
var res = AudioConverterGetProperty(handle, propertyID, ref size, out value);
if (res != AudioConverterError.None)
{
throw new ArgumentException(res.ToString());
}
return(value);
}
static extern AudioConverterError AudioConverterSetProperty(IntPtr inAudioConverter, AudioConverterPropertyID inPropertyID,
int inPropertyDataSize, byte[] inPropertyData);
static extern AudioConverterError AudioConverterGetPropertyInfo(IntPtr inAudioConverter, AudioConverterPropertyID inPropertyID,
out int outSize, out bool outWritable);
static extern AudioConverterError AudioConverterGetProperty(IntPtr inAudioConverter, AudioConverterPropertyID inPropertyID,
ref int ioPropertyDataSize, IntPtr outPropertyData);
unsafe AudioValueRange[] GetAudioValueRange(AudioConverterPropertyID prop)
{
return(GetArray <AudioValueRange> (prop, sizeof(AudioValueRange)));
}
static extern AudioConverterError AudioConverterGetPropertyInfo(IntPtr inAudioConverter, AudioConverterPropertyID inPropertyID,
out int outSize, [MarshalAs(UnmanagedType.I1)] out bool outWritable);
AudioValueRange[] GetAudioValueRange(AudioConverterPropertyID prop)
{
return(GetArray <AudioValueRange> (prop, Marshal.SizeOf(typeof(AudioValueRange))));
}
