private static unsafe void CopyPropertyFromFileToQueue(AudioStream *pThis, AudioFileProperty fileProp, AudioQueueProperty queueProp)
{
int size = sizeof(uint);
OSStatus status = API.AudioFileGetPropertyInfo(pThis->AudioFile, fileProp, &size, null);
if (status == 0 && size > 0)
{
void *pData = (void *)Marshal.AllocHGlobal(size);
API.AudioFileGetProperty(pThis->AudioFile, fileProp, &size, pData);
API.AudioQueueSetProperty(pThis->Queue, queueProp, pData, size);
Marshal.FreeHGlobal((IntPtr)pData);
}
}
private static unsafe void CreateQueue(AudioStream *pThis)
{
int dataFormatSize = sizeof(AudioStreamBasicDescription);
AudioStreamBasicDescription *pDataFormat = &pThis->DataFormat;
OSStatus status = API.AudioFileGetProperty(pThis->AudioFile, AudioFileProperty.DataFormat, &dataFormatSize, pDataFormat);
API.CheckStatus(status);
status = API.AudioQueueNewOutput(pDataFormat, OnReadBuffer, pThis, null, null, 0, &pThis->Queue);
API.CheckStatus(status);
dataFormatSize = sizeof(int);
int *pMaxPacketSize = &pThis->MaxPacketSize;
status = API.AudioFileGetProperty(pThis->AudioFile, AudioFileProperty.PacketSizeUpperBound, &dataFormatSize, pMaxPacketSize);
API.CheckStatus(status);
DeriveBufferSize(&pThis->DataFormat, pThis->MaxPacketSize, 0.5, &pThis->BufferByteSize, &pThis->NumPacketsToRead);
}
