unsafe static void OnReadInStream
(ref SoundIO.InStreamData stream, int min, int left)
{
// Recover the 'this' reference from the UserData pointer.
var self = (InputDeviceHandle)
GCHandle.FromIntPtr(stream.UserData).Target;
while (left > 0)
{
// Start reading the buffer.
var count = left;
SoundIO.ChannelArea *areas;
stream.BeginRead(out areas, ref count);
// When getting count == 0, we must stop reading
// immediately without calling InStream.EndRead.
if (count == 0)
{
break;
}
if (areas == null)
{
// We must do zero-fill when receiving a null pointer.
lock (self._ring)
self._ring.WriteEmpty(stream.BytesPerFrame * count);
}
else
{
// Determine the memory span of the input data with
// assuming the data is tightly packed.
// TODO: Is this assumption always true?
var span = new ReadOnlySpan <Byte>
((void *)areas[0].Pointer, areas[0].Step * count);
// Transfer the data to the ring buffer.
lock (self._ring) self._ring.Write(span);
}
stream.EndRead();
left -= count;
}
}
static void OnErrorInStream
(ref SoundIO.InStreamData stream, SoundIO.Error error)
=> UnityEngine.Debug.LogWarning($"InStream error ({error})");
static void OnOverflowInStream(ref SoundIO.InStreamData stream)
=> UnityEngine.Debug.LogWarning("InStream overflow");
