public AudioConverterError FillComplexBuffer(ref int outputDataPacketSize,
AudioBuffers outputData, AudioStreamPacketDescription[] packetDescription)
{
if (outputData == null)
{
throw new ArgumentNullException(nameof(outputData));
}
return(FillComplexBuffer(ref outputDataPacketSize, outputData, packetDescription, new Tuple <AudioConverter, AudioConverterComplexInputData> (this, null)));
}
public AudioConverterError ConvertComplexBuffer(int numberPCMFrames, AudioBuffers inputData, AudioBuffers outputData)
{
if (inputData == null)
{
throw new ArgumentNullException("inputData");
}
if (outputData == null)
{
throw new ArgumentNullException("outputData");
}
return(AudioConverterConvertComplexBuffer(handle, numberPCMFrames, (IntPtr)inputData, (IntPtr)outputData));
}
public AudioConverterError ConvertComplexBuffer(int numberPCMFrames, AudioBuffers inputData, AudioBuffers outputData)
{
if (inputData is null)
{
ObjCRuntime.ThrowHelper.ThrowArgumentNullException(nameof(inputData));
}
if (outputData is null)
{
ObjCRuntime.ThrowHelper.ThrowArgumentNullException(nameof(outputData));
}
return(AudioConverterConvertComplexBuffer(Handle, numberPCMFrames, (IntPtr)inputData, (IntPtr)outputData));
}
public AudioConverterError FillComplexBuffer(ref int outputDataPacketSize,
AudioBuffers outputData, AudioStreamPacketDescription[] packetDescription, AudioConverterComplexInputData newInputDataHandler)
{
if (outputData is null)
{
ObjCRuntime.ThrowHelper.ThrowArgumentNullException(nameof(outputData));
}
if (newInputDataHandler is null)
{
ObjCRuntime.ThrowHelper.ThrowArgumentNullException(nameof(newInputDataHandler));
}
return(FillComplexBuffer(ref outputDataPacketSize, outputData, packetDescription, new Tuple <AudioConverter, AudioConverterComplexInputData?> (this, newInputDataHandler)));
}
AudioConverterError FillComplexBuffer(ref int outputDataPacketSize,
AudioBuffers outputData, AudioStreamPacketDescription[] packetDescription, Tuple <AudioConverter, AudioConverterComplexInputData> instanceData)
{
var this_handle = GCHandle.Alloc(instanceData);
try {
var this_ptr = GCHandle.ToIntPtr(this_handle);
if (packetDescription == null)
{
return(AudioConverterFillComplexBuffer(handle, ComplexInputDataShared, this_ptr, ref outputDataPacketSize, (IntPtr)outputData, IntPtr.Zero));
}
unsafe
{
fixed(AudioStreamPacketDescription *pdesc = &packetDescription[0])
{
return(AudioConverterFillComplexBuffer(handle, ComplexInputDataShared, this_ptr, ref outputDataPacketSize, (IntPtr)outputData, (IntPtr)pdesc));
}
}
} finally {
this_handle.Free();
}
}
static AudioConverterError FillComplexBufferShared(IntPtr inAudioConverter, ref int ioNumberDataPackets, IntPtr ioData,
IntPtr outDataPacketDescription, IntPtr inUserData)
{
var handler = GCHandle.FromIntPtr(inUserData);
var instanceData = (Tuple <AudioConverter, AudioConverterComplexInputData>)handler.Target;
var inst = instanceData.Item1;
var callback = instanceData.Item2;
// Invoke event handler with an argument
// since callback is not provided, must come from the old FillComplexBuffer call
if (callback == null && inst.InputData == null)
{
throw new ArgumentNullException("InputData");
}
// Check if subscribed to event and provided a callback, error out if true
else if (callback != null && inst.InputData != null)
{
throw new InvalidOperationException("Please either only subscribe to InputData event or provide newInputDataHandler in FillComplexBuffer, using both is unsuported.");
}
using (var buffers = new AudioBuffers(ioData)) {
//
// Callback is supposed to fill outDataPacketDescription when outDataPacketDescription is not NULL
// Using 0-size array as marker because the size of pre-allocated memory is not known
//
var data = outDataPacketDescription == IntPtr.Zero ? null : new AudioStreamPacketDescription [0];
var res = inst.InputData != null?
inst.InputData(ref ioNumberDataPackets, buffers, ref data) :
callback(ref ioNumberDataPackets, buffers, ref data);
if (outDataPacketDescription != IntPtr.Zero)
{
if (ioNumberDataPackets > 0)
{
if (data == null || data.Length == 0)
{
throw new ArgumentException("ref argument outDataPacketDescription has to be set");
}
//
// Apple doc says the output buffer has to be pre-allocated using last argument to
// AudioConverterFillComplexBuffer but even if NULL is passed and convertor requires
// packet description outDataPacketDescription is not NULL and it such case we will
// write at some unknown pointer location, similar situation happens when initialization
// size does not match data size
//
int size = Marshal.SizeOf(data [0]);
// Clear our buffer if it's not big enough
if (inst.packetDescriptionSize < data.Length && inst.packetDescriptions != IntPtr.Zero)
{
Marshal.FreeHGlobal(inst.packetDescriptions);
inst.packetDescriptions = IntPtr.Zero;
}
// Create a new buffer if we don't already have one
if (inst.packetDescriptions == IntPtr.Zero)
{
inst.packetDescriptionSize = data.Length;
inst.packetDescriptions = Marshal.AllocHGlobal(data.Length * size);
}
unsafe
{
fixed(void *source = data)
{
Buffer.MemoryCopy(source, (void *)inst.packetDescriptions, inst.packetDescriptionSize * size, data.Length * size);
}
}
Marshal.WriteIntPtr(outDataPacketDescription, inst.packetDescriptions);
}
else
{
Marshal.WriteIntPtr(outDataPacketDescription, IntPtr.Zero);
}
}
return(res);
}
}
